Mercurial > hg > graal-jvmci-8
annotate src/cpu/x86/vm/macroAssembler_x86.cpp @ 17922:400709e275c1
8029302: Performance regression in Math.pow intrinsic
Summary: Added special case for x^y where y == 2
Reviewed-by: kvn
| author | adlertz |
|---|---|
| date | Fri, 25 Apr 2014 12:48:34 +0200 |
| parents | 526acaf3626f |
| children | 78bbf4d43a14 |
| rev | line source |
|---|---|
| 7199 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 7199 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "asm/assembler.hpp" | |
| 27 #include "asm/assembler.inline.hpp" | |
| 28 #include "compiler/disassembler.hpp" | |
| 29 #include "gc_interface/collectedHeap.inline.hpp" | |
| 30 #include "interpreter/interpreter.hpp" | |
| 31 #include "memory/cardTableModRefBS.hpp" | |
| 32 #include "memory/resourceArea.hpp" | |
|
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33 #include "memory/universe.hpp" |
| 7199 | 34 #include "prims/methodHandles.hpp" |
| 35 #include "runtime/biasedLocking.hpp" | |
| 36 #include "runtime/interfaceSupport.hpp" | |
| 37 #include "runtime/objectMonitor.hpp" | |
| 38 #include "runtime/os.hpp" | |
| 39 #include "runtime/sharedRuntime.hpp" | |
| 40 #include "runtime/stubRoutines.hpp" | |
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41 #include "utilities/macros.hpp" |
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42 #if INCLUDE_ALL_GCS |
| 7199 | 43 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 44 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
| 45 #include "gc_implementation/g1/heapRegion.hpp" | |
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46 #endif // INCLUDE_ALL_GCS |
| 7199 | 47 |
| 48 #ifdef PRODUCT | |
| 49 #define BLOCK_COMMENT(str) /* nothing */ | |
| 50 #define STOP(error) stop(error) | |
| 51 #else | |
| 52 #define BLOCK_COMMENT(str) block_comment(str) | |
| 53 #define STOP(error) block_comment(error); stop(error) | |
| 54 #endif | |
| 55 | |
| 56 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
| 57 | |
| 58 | |
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59 #ifdef ASSERT |
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60 bool AbstractAssembler::pd_check_instruction_mark() { return true; } |
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61 #endif |
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62 |
| 7199 | 63 static Assembler::Condition reverse[] = { |
| 64 Assembler::noOverflow /* overflow = 0x0 */ , | |
| 65 Assembler::overflow /* noOverflow = 0x1 */ , | |
| 66 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ , | |
| 67 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ , | |
| 68 Assembler::notZero /* zero = 0x4, equal = 0x4 */ , | |
| 69 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ , | |
| 70 Assembler::above /* belowEqual = 0x6 */ , | |
| 71 Assembler::belowEqual /* above = 0x7 */ , | |
| 72 Assembler::positive /* negative = 0x8 */ , | |
| 73 Assembler::negative /* positive = 0x9 */ , | |
| 74 Assembler::noParity /* parity = 0xa */ , | |
| 75 Assembler::parity /* noParity = 0xb */ , | |
| 76 Assembler::greaterEqual /* less = 0xc */ , | |
| 77 Assembler::less /* greaterEqual = 0xd */ , | |
| 78 Assembler::greater /* lessEqual = 0xe */ , | |
| 79 Assembler::lessEqual /* greater = 0xf, */ | |
| 80 | |
| 81 }; | |
| 82 | |
| 83 | |
| 84 // Implementation of MacroAssembler | |
| 85 | |
| 86 // First all the versions that have distinct versions depending on 32/64 bit | |
| 87 // Unless the difference is trivial (1 line or so). | |
| 88 | |
| 89 #ifndef _LP64 | |
| 90 | |
| 91 // 32bit versions | |
| 92 | |
| 93 Address MacroAssembler::as_Address(AddressLiteral adr) { | |
| 94 return Address(adr.target(), adr.rspec()); | |
| 95 } | |
| 96 | |
| 97 Address MacroAssembler::as_Address(ArrayAddress adr) { | |
| 98 return Address::make_array(adr); | |
| 99 } | |
| 100 | |
| 101 void MacroAssembler::call_VM_leaf_base(address entry_point, | |
| 102 int number_of_arguments) { | |
| 103 call(RuntimeAddress(entry_point)); | |
| 104 increment(rsp, number_of_arguments * wordSize); | |
| 105 } | |
| 106 | |
| 107 void MacroAssembler::cmpklass(Address src1, Metadata* obj) { | |
| 108 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 109 } | |
| 110 | |
| 111 void MacroAssembler::cmpklass(Register src1, Metadata* obj) { | |
| 112 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 113 } | |
| 114 | |
| 115 void MacroAssembler::cmpoop(Address src1, jobject obj) { | |
| 116 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 117 } | |
| 118 | |
| 119 void MacroAssembler::cmpoop(Register src1, jobject obj) { | |
| 120 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 121 } | |
| 122 | |
| 123 void MacroAssembler::extend_sign(Register hi, Register lo) { | |
| 124 // According to Intel Doc. AP-526, "Integer Divide", p.18. | |
| 125 if (VM_Version::is_P6() && hi == rdx && lo == rax) { | |
| 126 cdql(); | |
| 127 } else { | |
| 128 movl(hi, lo); | |
| 129 sarl(hi, 31); | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 void MacroAssembler::jC2(Register tmp, Label& L) { | |
| 134 // set parity bit if FPU flag C2 is set (via rax) | |
| 135 save_rax(tmp); | |
| 136 fwait(); fnstsw_ax(); | |
| 137 sahf(); | |
| 138 restore_rax(tmp); | |
| 139 // branch | |
| 140 jcc(Assembler::parity, L); | |
| 141 } | |
| 142 | |
| 143 void MacroAssembler::jnC2(Register tmp, Label& L) { | |
| 144 // set parity bit if FPU flag C2 is set (via rax) | |
| 145 save_rax(tmp); | |
| 146 fwait(); fnstsw_ax(); | |
| 147 sahf(); | |
| 148 restore_rax(tmp); | |
| 149 // branch | |
| 150 jcc(Assembler::noParity, L); | |
| 151 } | |
| 152 | |
| 153 // 32bit can do a case table jump in one instruction but we no longer allow the base | |
| 154 // to be installed in the Address class | |
| 155 void MacroAssembler::jump(ArrayAddress entry) { | |
| 156 jmp(as_Address(entry)); | |
| 157 } | |
| 158 | |
| 159 // Note: y_lo will be destroyed | |
| 160 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { | |
| 161 // Long compare for Java (semantics as described in JVM spec.) | |
| 162 Label high, low, done; | |
| 163 | |
| 164 cmpl(x_hi, y_hi); | |
| 165 jcc(Assembler::less, low); | |
| 166 jcc(Assembler::greater, high); | |
| 167 // x_hi is the return register | |
| 168 xorl(x_hi, x_hi); | |
| 169 cmpl(x_lo, y_lo); | |
| 170 jcc(Assembler::below, low); | |
| 171 jcc(Assembler::equal, done); | |
| 172 | |
| 173 bind(high); | |
| 174 xorl(x_hi, x_hi); | |
| 175 increment(x_hi); | |
| 176 jmp(done); | |
| 177 | |
| 178 bind(low); | |
| 179 xorl(x_hi, x_hi); | |
| 180 decrementl(x_hi); | |
| 181 | |
| 182 bind(done); | |
| 183 } | |
| 184 | |
| 185 void MacroAssembler::lea(Register dst, AddressLiteral src) { | |
| 186 mov_literal32(dst, (int32_t)src.target(), src.rspec()); | |
| 187 } | |
| 188 | |
| 189 void MacroAssembler::lea(Address dst, AddressLiteral adr) { | |
| 190 // leal(dst, as_Address(adr)); | |
| 191 // see note in movl as to why we must use a move | |
| 192 mov_literal32(dst, (int32_t) adr.target(), adr.rspec()); | |
| 193 } | |
| 194 | |
| 195 void MacroAssembler::leave() { | |
| 196 mov(rsp, rbp); | |
| 197 pop(rbp); | |
| 198 } | |
| 199 | |
| 200 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) { | |
| 201 // Multiplication of two Java long values stored on the stack | |
| 202 // as illustrated below. Result is in rdx:rax. | |
| 203 // | |
| 204 // rsp ---> [ ?? ] \ \ | |
| 205 // .... | y_rsp_offset | | |
| 206 // [ y_lo ] / (in bytes) | x_rsp_offset | |
| 207 // [ y_hi ] | (in bytes) | |
| 208 // .... | | |
| 209 // [ x_lo ] / | |
| 210 // [ x_hi ] | |
| 211 // .... | |
| 212 // | |
| 213 // Basic idea: lo(result) = lo(x_lo * y_lo) | |
| 214 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi) | |
| 215 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset); | |
| 216 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset); | |
| 217 Label quick; | |
| 218 // load x_hi, y_hi and check if quick | |
| 219 // multiplication is possible | |
| 220 movl(rbx, x_hi); | |
| 221 movl(rcx, y_hi); | |
| 222 movl(rax, rbx); | |
| 223 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0 | |
| 224 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply | |
| 225 // do full multiplication | |
| 226 // 1st step | |
| 227 mull(y_lo); // x_hi * y_lo | |
| 228 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx, | |
| 229 // 2nd step | |
| 230 movl(rax, x_lo); | |
| 231 mull(rcx); // x_lo * y_hi | |
| 232 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx, | |
| 233 // 3rd step | |
| 234 bind(quick); // note: rbx, = 0 if quick multiply! | |
| 235 movl(rax, x_lo); | |
| 236 mull(y_lo); // x_lo * y_lo | |
| 237 addl(rdx, rbx); // correct hi(x_lo * y_lo) | |
| 238 } | |
| 239 | |
| 240 void MacroAssembler::lneg(Register hi, Register lo) { | |
| 241 negl(lo); | |
| 242 adcl(hi, 0); | |
| 243 negl(hi); | |
| 244 } | |
| 245 | |
| 246 void MacroAssembler::lshl(Register hi, Register lo) { | |
| 247 // Java shift left long support (semantics as described in JVM spec., p.305) | |
| 248 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n)) | |
| 249 // shift value is in rcx ! | |
| 250 assert(hi != rcx, "must not use rcx"); | |
| 251 assert(lo != rcx, "must not use rcx"); | |
| 252 const Register s = rcx; // shift count | |
| 253 const int n = BitsPerWord; | |
| 254 Label L; | |
| 255 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) | |
| 256 cmpl(s, n); // if (s < n) | |
| 257 jcc(Assembler::less, L); // else (s >= n) | |
| 258 movl(hi, lo); // x := x << n | |
| 259 xorl(lo, lo); | |
| 260 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! | |
| 261 bind(L); // s (mod n) < n | |
| 262 shldl(hi, lo); // x := x << s | |
| 263 shll(lo); | |
| 264 } | |
| 265 | |
| 266 | |
| 267 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) { | |
| 268 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310) | |
| 269 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n)) | |
| 270 assert(hi != rcx, "must not use rcx"); | |
| 271 assert(lo != rcx, "must not use rcx"); | |
| 272 const Register s = rcx; // shift count | |
| 273 const int n = BitsPerWord; | |
| 274 Label L; | |
| 275 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) | |
| 276 cmpl(s, n); // if (s < n) | |
| 277 jcc(Assembler::less, L); // else (s >= n) | |
| 278 movl(lo, hi); // x := x >> n | |
| 279 if (sign_extension) sarl(hi, 31); | |
| 280 else xorl(hi, hi); | |
| 281 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! | |
| 282 bind(L); // s (mod n) < n | |
| 283 shrdl(lo, hi); // x := x >> s | |
| 284 if (sign_extension) sarl(hi); | |
| 285 else shrl(hi); | |
| 286 } | |
| 287 | |
| 288 void MacroAssembler::movoop(Register dst, jobject obj) { | |
| 289 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 290 } | |
| 291 | |
| 292 void MacroAssembler::movoop(Address dst, jobject obj) { | |
| 293 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 294 } | |
| 295 | |
| 296 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { | |
| 297 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 298 } | |
| 299 | |
| 300 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { | |
| 301 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 302 } | |
| 303 | |
| 17780 | 304 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) { |
| 305 // scratch register is not used, | |
| 306 // it is defined to match parameters of 64-bit version of this method. | |
| 7199 | 307 if (src.is_lval()) { |
| 308 mov_literal32(dst, (intptr_t)src.target(), src.rspec()); | |
| 309 } else { | |
| 310 movl(dst, as_Address(src)); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 void MacroAssembler::movptr(ArrayAddress dst, Register src) { | |
| 315 movl(as_Address(dst), src); | |
| 316 } | |
| 317 | |
| 318 void MacroAssembler::movptr(Register dst, ArrayAddress src) { | |
| 319 movl(dst, as_Address(src)); | |
| 320 } | |
| 321 | |
| 322 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
| 323 void MacroAssembler::movptr(Address dst, intptr_t src) { | |
| 324 movl(dst, src); | |
| 325 } | |
| 326 | |
| 327 | |
| 328 void MacroAssembler::pop_callee_saved_registers() { | |
| 329 pop(rcx); | |
| 330 pop(rdx); | |
| 331 pop(rdi); | |
| 332 pop(rsi); | |
| 333 } | |
| 334 | |
| 335 void MacroAssembler::pop_fTOS() { | |
| 336 fld_d(Address(rsp, 0)); | |
| 337 addl(rsp, 2 * wordSize); | |
| 338 } | |
| 339 | |
| 340 void MacroAssembler::push_callee_saved_registers() { | |
| 341 push(rsi); | |
| 342 push(rdi); | |
| 343 push(rdx); | |
| 344 push(rcx); | |
| 345 } | |
| 346 | |
| 347 void MacroAssembler::push_fTOS() { | |
| 348 subl(rsp, 2 * wordSize); | |
| 349 fstp_d(Address(rsp, 0)); | |
| 350 } | |
| 351 | |
| 352 | |
| 353 void MacroAssembler::pushoop(jobject obj) { | |
| 354 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 355 } | |
| 356 | |
| 357 void MacroAssembler::pushklass(Metadata* obj) { | |
| 358 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 359 } | |
| 360 | |
| 361 void MacroAssembler::pushptr(AddressLiteral src) { | |
| 362 if (src.is_lval()) { | |
| 363 push_literal32((int32_t)src.target(), src.rspec()); | |
| 364 } else { | |
| 365 pushl(as_Address(src)); | |
| 366 } | |
| 367 } | |
| 368 | |
| 369 void MacroAssembler::set_word_if_not_zero(Register dst) { | |
| 370 xorl(dst, dst); | |
| 371 set_byte_if_not_zero(dst); | |
| 372 } | |
| 373 | |
| 374 static void pass_arg0(MacroAssembler* masm, Register arg) { | |
| 375 masm->push(arg); | |
| 376 } | |
| 377 | |
| 378 static void pass_arg1(MacroAssembler* masm, Register arg) { | |
| 379 masm->push(arg); | |
| 380 } | |
| 381 | |
| 382 static void pass_arg2(MacroAssembler* masm, Register arg) { | |
| 383 masm->push(arg); | |
| 384 } | |
| 385 | |
| 386 static void pass_arg3(MacroAssembler* masm, Register arg) { | |
| 387 masm->push(arg); | |
| 388 } | |
| 389 | |
| 390 #ifndef PRODUCT | |
| 391 extern "C" void findpc(intptr_t x); | |
| 392 #endif | |
| 393 | |
| 394 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) { | |
| 395 // In order to get locks to work, we need to fake a in_VM state | |
| 396 JavaThread* thread = JavaThread::current(); | |
| 397 JavaThreadState saved_state = thread->thread_state(); | |
| 398 thread->set_thread_state(_thread_in_vm); | |
| 399 if (ShowMessageBoxOnError) { | |
| 400 JavaThread* thread = JavaThread::current(); | |
| 401 JavaThreadState saved_state = thread->thread_state(); | |
| 402 thread->set_thread_state(_thread_in_vm); | |
| 403 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
| 404 ttyLocker ttyl; | |
| 405 BytecodeCounter::print(); | |
| 406 } | |
| 407 // To see where a verify_oop failed, get $ebx+40/X for this frame. | |
| 408 // This is the value of eip which points to where verify_oop will return. | |
| 409 if (os::message_box(msg, "Execution stopped, print registers?")) { | |
| 410 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip); | |
| 411 BREAKPOINT; | |
| 412 } | |
| 413 } else { | |
| 414 ttyLocker ttyl; | |
| 415 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); | |
| 416 } | |
| 417 // Don't assert holding the ttyLock | |
| 418 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
| 419 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); | |
| 420 } | |
| 421 | |
| 422 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) { | |
| 423 ttyLocker ttyl; | |
| 424 FlagSetting fs(Debugging, true); | |
| 425 tty->print_cr("eip = 0x%08x", eip); | |
| 426 #ifndef PRODUCT | |
| 427 if ((WizardMode || Verbose) && PrintMiscellaneous) { | |
| 428 tty->cr(); | |
| 429 findpc(eip); | |
| 430 tty->cr(); | |
| 431 } | |
| 432 #endif | |
| 433 #define PRINT_REG(rax) \ | |
| 434 { tty->print("%s = ", #rax); os::print_location(tty, rax); } | |
| 435 PRINT_REG(rax); | |
| 436 PRINT_REG(rbx); | |
| 437 PRINT_REG(rcx); | |
| 438 PRINT_REG(rdx); | |
| 439 PRINT_REG(rdi); | |
| 440 PRINT_REG(rsi); | |
| 441 PRINT_REG(rbp); | |
| 442 PRINT_REG(rsp); | |
| 443 #undef PRINT_REG | |
| 444 // Print some words near top of staack. | |
| 445 int* dump_sp = (int*) rsp; | |
| 446 for (int col1 = 0; col1 < 8; col1++) { | |
| 447 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); | |
| 448 os::print_location(tty, *dump_sp++); | |
| 449 } | |
| 450 for (int row = 0; row < 16; row++) { | |
| 451 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); | |
| 452 for (int col = 0; col < 8; col++) { | |
| 453 tty->print(" 0x%08x", *dump_sp++); | |
| 454 } | |
| 455 tty->cr(); | |
| 456 } | |
| 457 // Print some instructions around pc: | |
| 458 Disassembler::decode((address)eip-64, (address)eip); | |
| 459 tty->print_cr("--------"); | |
| 460 Disassembler::decode((address)eip, (address)eip+32); | |
| 461 } | |
| 462 | |
| 463 void MacroAssembler::stop(const char* msg) { | |
| 464 ExternalAddress message((address)msg); | |
| 465 // push address of message | |
| 466 pushptr(message.addr()); | |
| 467 { Label L; call(L, relocInfo::none); bind(L); } // push eip | |
| 468 pusha(); // push registers | |
| 469 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); | |
| 470 hlt(); | |
| 471 } | |
| 472 | |
| 473 void MacroAssembler::warn(const char* msg) { | |
| 474 push_CPU_state(); | |
| 475 | |
| 476 ExternalAddress message((address) msg); | |
| 477 // push address of message | |
| 478 pushptr(message.addr()); | |
| 479 | |
| 480 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning))); | |
| 481 addl(rsp, wordSize); // discard argument | |
| 482 pop_CPU_state(); | |
| 483 } | |
| 484 | |
| 485 void MacroAssembler::print_state() { | |
| 486 { Label L; call(L, relocInfo::none); bind(L); } // push eip | |
| 487 pusha(); // push registers | |
| 488 | |
| 489 push_CPU_state(); | |
| 490 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32))); | |
| 491 pop_CPU_state(); | |
| 492 | |
| 493 popa(); | |
| 494 addl(rsp, wordSize); | |
| 495 } | |
| 496 | |
| 497 #else // _LP64 | |
| 498 | |
| 499 // 64 bit versions | |
| 500 | |
| 501 Address MacroAssembler::as_Address(AddressLiteral adr) { | |
| 502 // amd64 always does this as a pc-rel | |
| 503 // we can be absolute or disp based on the instruction type | |
| 504 // jmp/call are displacements others are absolute | |
| 505 assert(!adr.is_lval(), "must be rval"); | |
| 506 assert(reachable(adr), "must be"); | |
| 507 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc()); | |
| 508 | |
| 509 } | |
| 510 | |
| 511 Address MacroAssembler::as_Address(ArrayAddress adr) { | |
| 512 AddressLiteral base = adr.base(); | |
| 513 lea(rscratch1, base); | |
| 514 Address index = adr.index(); | |
| 515 assert(index._disp == 0, "must not have disp"); // maybe it can? | |
| 516 Address array(rscratch1, index._index, index._scale, index._disp); | |
| 517 return array; | |
| 518 } | |
| 519 | |
| 520 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) { | |
| 521 Label L, E; | |
| 522 | |
| 523 #ifdef _WIN64 | |
| 524 // Windows always allocates space for it's register args | |
| 525 assert(num_args <= 4, "only register arguments supported"); | |
| 526 subq(rsp, frame::arg_reg_save_area_bytes); | |
| 527 #endif | |
| 528 | |
| 529 // Align stack if necessary | |
| 530 testl(rsp, 15); | |
| 531 jcc(Assembler::zero, L); | |
| 532 | |
| 533 subq(rsp, 8); | |
| 534 { | |
| 535 call(RuntimeAddress(entry_point)); | |
| 536 } | |
| 537 addq(rsp, 8); | |
| 538 jmp(E); | |
| 539 | |
| 540 bind(L); | |
| 541 { | |
| 542 call(RuntimeAddress(entry_point)); | |
| 543 } | |
| 544 | |
| 545 bind(E); | |
| 546 | |
| 547 #ifdef _WIN64 | |
| 548 // restore stack pointer | |
| 549 addq(rsp, frame::arg_reg_save_area_bytes); | |
| 550 #endif | |
| 551 | |
| 552 } | |
| 553 | |
| 554 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) { | |
| 555 assert(!src2.is_lval(), "should use cmpptr"); | |
| 556 | |
| 557 if (reachable(src2)) { | |
| 558 cmpq(src1, as_Address(src2)); | |
| 559 } else { | |
| 560 lea(rscratch1, src2); | |
| 561 Assembler::cmpq(src1, Address(rscratch1, 0)); | |
| 562 } | |
| 563 } | |
| 564 | |
| 565 int MacroAssembler::corrected_idivq(Register reg) { | |
| 566 // Full implementation of Java ldiv and lrem; checks for special | |
| 567 // case as described in JVM spec., p.243 & p.271. The function | |
| 568 // returns the (pc) offset of the idivl instruction - may be needed | |
| 569 // for implicit exceptions. | |
| 570 // | |
| 571 // normal case special case | |
| 572 // | |
| 573 // input : rax: dividend min_long | |
| 574 // reg: divisor (may not be eax/edx) -1 | |
| 575 // | |
| 576 // output: rax: quotient (= rax idiv reg) min_long | |
| 577 // rdx: remainder (= rax irem reg) 0 | |
| 578 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register"); | |
| 579 static const int64_t min_long = 0x8000000000000000; | |
| 580 Label normal_case, special_case; | |
| 581 | |
| 582 // check for special case | |
| 583 cmp64(rax, ExternalAddress((address) &min_long)); | |
| 584 jcc(Assembler::notEqual, normal_case); | |
| 585 xorl(rdx, rdx); // prepare rdx for possible special case (where | |
| 586 // remainder = 0) | |
| 587 cmpq(reg, -1); | |
| 588 jcc(Assembler::equal, special_case); | |
| 589 | |
| 590 // handle normal case | |
| 591 bind(normal_case); | |
| 592 cdqq(); | |
| 593 int idivq_offset = offset(); | |
| 594 idivq(reg); | |
| 595 | |
| 596 // normal and special case exit | |
| 597 bind(special_case); | |
| 598 | |
| 599 return idivq_offset; | |
| 600 } | |
| 601 | |
| 602 void MacroAssembler::decrementq(Register reg, int value) { | |
| 603 if (value == min_jint) { subq(reg, value); return; } | |
| 604 if (value < 0) { incrementq(reg, -value); return; } | |
| 605 if (value == 0) { ; return; } | |
| 606 if (value == 1 && UseIncDec) { decq(reg) ; return; } | |
| 607 /* else */ { subq(reg, value) ; return; } | |
| 608 } | |
| 609 | |
| 610 void MacroAssembler::decrementq(Address dst, int value) { | |
| 611 if (value == min_jint) { subq(dst, value); return; } | |
| 612 if (value < 0) { incrementq(dst, -value); return; } | |
| 613 if (value == 0) { ; return; } | |
| 614 if (value == 1 && UseIncDec) { decq(dst) ; return; } | |
| 615 /* else */ { subq(dst, value) ; return; } | |
| 616 } | |
| 617 | |
| 17780 | 618 void MacroAssembler::incrementq(AddressLiteral dst) { |
| 619 if (reachable(dst)) { | |
| 620 incrementq(as_Address(dst)); | |
| 621 } else { | |
| 622 lea(rscratch1, dst); | |
| 623 incrementq(Address(rscratch1, 0)); | |
| 624 } | |
| 625 } | |
| 626 | |
| 7199 | 627 void MacroAssembler::incrementq(Register reg, int value) { |
| 628 if (value == min_jint) { addq(reg, value); return; } | |
| 629 if (value < 0) { decrementq(reg, -value); return; } | |
| 630 if (value == 0) { ; return; } | |
| 631 if (value == 1 && UseIncDec) { incq(reg) ; return; } | |
| 632 /* else */ { addq(reg, value) ; return; } | |
| 633 } | |
| 634 | |
| 635 void MacroAssembler::incrementq(Address dst, int value) { | |
| 636 if (value == min_jint) { addq(dst, value); return; } | |
| 637 if (value < 0) { decrementq(dst, -value); return; } | |
| 638 if (value == 0) { ; return; } | |
| 639 if (value == 1 && UseIncDec) { incq(dst) ; return; } | |
| 640 /* else */ { addq(dst, value) ; return; } | |
| 641 } | |
| 642 | |
| 643 // 32bit can do a case table jump in one instruction but we no longer allow the base | |
| 644 // to be installed in the Address class | |
| 645 void MacroAssembler::jump(ArrayAddress entry) { | |
| 646 lea(rscratch1, entry.base()); | |
| 647 Address dispatch = entry.index(); | |
| 648 assert(dispatch._base == noreg, "must be"); | |
| 649 dispatch._base = rscratch1; | |
| 650 jmp(dispatch); | |
| 651 } | |
| 652 | |
| 653 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { | |
| 654 ShouldNotReachHere(); // 64bit doesn't use two regs | |
| 655 cmpq(x_lo, y_lo); | |
| 656 } | |
| 657 | |
| 658 void MacroAssembler::lea(Register dst, AddressLiteral src) { | |
| 659 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); | |
| 660 } | |
| 661 | |
| 662 void MacroAssembler::lea(Address dst, AddressLiteral adr) { | |
| 663 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec()); | |
| 664 movptr(dst, rscratch1); | |
| 665 } | |
| 666 | |
| 667 void MacroAssembler::leave() { | |
| 668 // %%% is this really better? Why not on 32bit too? | |
|
7430
d02120b7a34f
8004250: replace AbstractAssembler a_byte/a_long with emit_int8/emit_int32
twisti
parents:
7427
diff
changeset
|
669 emit_int8((unsigned char)0xC9); // LEAVE |
| 7199 | 670 } |
| 671 | |
| 672 void MacroAssembler::lneg(Register hi, Register lo) { | |
| 673 ShouldNotReachHere(); // 64bit doesn't use two regs | |
| 674 negq(lo); | |
| 675 } | |
| 676 | |
| 677 void MacroAssembler::movoop(Register dst, jobject obj) { | |
| 678 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate()); | |
| 679 } | |
| 680 | |
| 681 void MacroAssembler::movoop(Address dst, jobject obj) { | |
| 682 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate()); | |
| 683 movq(dst, rscratch1); | |
| 684 } | |
| 685 | |
| 686 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { | |
| 687 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 688 } | |
| 689 | |
| 690 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { | |
| 691 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 692 movq(dst, rscratch1); | |
| 693 } | |
| 694 | |
| 17780 | 695 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) { |
| 7199 | 696 if (src.is_lval()) { |
| 697 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); | |
| 698 } else { | |
| 699 if (reachable(src)) { | |
| 700 movq(dst, as_Address(src)); | |
| 701 } else { | |
| 17780 | 702 lea(scratch, src); |
| 703 movq(dst, Address(scratch, 0)); | |
| 7199 | 704 } |
| 705 } | |
| 706 } | |
| 707 | |
| 708 void MacroAssembler::movptr(ArrayAddress dst, Register src) { | |
| 709 movq(as_Address(dst), src); | |
| 710 } | |
| 711 | |
| 712 void MacroAssembler::movptr(Register dst, ArrayAddress src) { | |
| 713 movq(dst, as_Address(src)); | |
| 714 } | |
| 715 | |
| 716 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
| 717 void MacroAssembler::movptr(Address dst, intptr_t src) { | |
| 718 mov64(rscratch1, src); | |
| 719 movq(dst, rscratch1); | |
| 720 } | |
| 721 | |
| 722 // These are mostly for initializing NULL | |
| 723 void MacroAssembler::movptr(Address dst, int32_t src) { | |
| 724 movslq(dst, src); | |
| 725 } | |
| 726 | |
| 727 void MacroAssembler::movptr(Register dst, int32_t src) { | |
| 728 mov64(dst, (intptr_t)src); | |
| 729 } | |
| 730 | |
| 731 void MacroAssembler::pushoop(jobject obj) { | |
| 732 movoop(rscratch1, obj); | |
| 733 push(rscratch1); | |
| 734 } | |
| 735 | |
| 736 void MacroAssembler::pushklass(Metadata* obj) { | |
| 737 mov_metadata(rscratch1, obj); | |
| 738 push(rscratch1); | |
| 739 } | |
| 740 | |
| 741 void MacroAssembler::pushptr(AddressLiteral src) { | |
| 742 lea(rscratch1, src); | |
| 743 if (src.is_lval()) { | |
| 744 push(rscratch1); | |
| 745 } else { | |
| 746 pushq(Address(rscratch1, 0)); | |
| 747 } | |
| 748 } | |
| 749 | |
| 750 void MacroAssembler::reset_last_Java_frame(bool clear_fp, | |
| 751 bool clear_pc) { | |
| 752 // we must set sp to zero to clear frame | |
| 753 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); | |
| 754 // must clear fp, so that compiled frames are not confused; it is | |
| 755 // possible that we need it only for debugging | |
| 756 if (clear_fp) { | |
| 757 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); | |
| 758 } | |
| 759 | |
| 760 if (clear_pc) { | |
| 761 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); | |
| 762 } | |
| 763 } | |
| 764 | |
| 765 void MacroAssembler::set_last_Java_frame(Register last_java_sp, | |
| 766 Register last_java_fp, | |
| 767 address last_java_pc) { | |
| 768 // determine last_java_sp register | |
| 769 if (!last_java_sp->is_valid()) { | |
| 770 last_java_sp = rsp; | |
| 771 } | |
| 772 | |
| 773 // last_java_fp is optional | |
| 774 if (last_java_fp->is_valid()) { | |
| 775 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), | |
| 776 last_java_fp); | |
| 777 } | |
| 778 | |
| 779 // last_java_pc is optional | |
| 780 if (last_java_pc != NULL) { | |
| 781 Address java_pc(r15_thread, | |
| 782 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); | |
| 783 lea(rscratch1, InternalAddress(last_java_pc)); | |
| 784 movptr(java_pc, rscratch1); | |
| 785 } | |
| 786 | |
| 787 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp); | |
| 788 } | |
| 789 | |
| 790 static void pass_arg0(MacroAssembler* masm, Register arg) { | |
| 791 if (c_rarg0 != arg ) { | |
| 792 masm->mov(c_rarg0, arg); | |
| 793 } | |
| 794 } | |
| 795 | |
| 796 static void pass_arg1(MacroAssembler* masm, Register arg) { | |
| 797 if (c_rarg1 != arg ) { | |
| 798 masm->mov(c_rarg1, arg); | |
| 799 } | |
| 800 } | |
| 801 | |
| 802 static void pass_arg2(MacroAssembler* masm, Register arg) { | |
| 803 if (c_rarg2 != arg ) { | |
| 804 masm->mov(c_rarg2, arg); | |
| 805 } | |
| 806 } | |
| 807 | |
| 808 static void pass_arg3(MacroAssembler* masm, Register arg) { | |
| 809 if (c_rarg3 != arg ) { | |
| 810 masm->mov(c_rarg3, arg); | |
| 811 } | |
| 812 } | |
| 813 | |
| 814 void MacroAssembler::stop(const char* msg) { | |
| 815 address rip = pc(); | |
| 816 pusha(); // get regs on stack | |
| 817 lea(c_rarg0, ExternalAddress((address) msg)); | |
| 818 lea(c_rarg1, InternalAddress(rip)); | |
| 819 movq(c_rarg2, rsp); // pass pointer to regs array | |
| 820 andq(rsp, -16); // align stack as required by ABI | |
| 821 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); | |
| 822 hlt(); | |
| 823 } | |
| 824 | |
| 825 void MacroAssembler::warn(const char* msg) { | |
| 826 push(rbp); | |
| 827 movq(rbp, rsp); | |
| 828 andq(rsp, -16); // align stack as required by push_CPU_state and call | |
| 829 push_CPU_state(); // keeps alignment at 16 bytes | |
| 830 lea(c_rarg0, ExternalAddress((address) msg)); | |
| 831 call_VM_leaf(CAST_FROM_FN_PTR(address, warning), c_rarg0); | |
| 832 pop_CPU_state(); | |
| 833 mov(rsp, rbp); | |
| 834 pop(rbp); | |
| 835 } | |
| 836 | |
| 837 void MacroAssembler::print_state() { | |
| 838 address rip = pc(); | |
| 839 pusha(); // get regs on stack | |
| 840 push(rbp); | |
| 841 movq(rbp, rsp); | |
| 842 andq(rsp, -16); // align stack as required by push_CPU_state and call | |
| 843 push_CPU_state(); // keeps alignment at 16 bytes | |
| 844 | |
| 845 lea(c_rarg0, InternalAddress(rip)); | |
| 846 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array | |
| 847 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1); | |
| 848 | |
| 849 pop_CPU_state(); | |
| 850 mov(rsp, rbp); | |
| 851 pop(rbp); | |
| 852 popa(); | |
| 853 } | |
| 854 | |
| 855 #ifndef PRODUCT | |
| 856 extern "C" void findpc(intptr_t x); | |
| 857 #endif | |
| 858 | |
| 859 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) { | |
| 860 // In order to get locks to work, we need to fake a in_VM state | |
| 861 if (ShowMessageBoxOnError) { | |
| 862 JavaThread* thread = JavaThread::current(); | |
| 863 JavaThreadState saved_state = thread->thread_state(); | |
| 864 thread->set_thread_state(_thread_in_vm); | |
| 865 #ifndef PRODUCT | |
| 866 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
| 867 ttyLocker ttyl; | |
| 868 BytecodeCounter::print(); | |
| 869 } | |
| 870 #endif | |
| 871 // To see where a verify_oop failed, get $ebx+40/X for this frame. | |
| 872 // XXX correct this offset for amd64 | |
| 873 // This is the value of eip which points to where verify_oop will return. | |
| 874 if (os::message_box(msg, "Execution stopped, print registers?")) { | |
| 875 print_state64(pc, regs); | |
| 876 BREAKPOINT; | |
| 877 assert(false, "start up GDB"); | |
| 878 } | |
| 879 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); | |
| 880 } else { | |
| 881 ttyLocker ttyl; | |
| 882 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", | |
| 883 msg); | |
| 884 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
| 885 } | |
| 886 } | |
| 887 | |
| 888 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) { | |
| 889 ttyLocker ttyl; | |
| 890 FlagSetting fs(Debugging, true); | |
| 891 tty->print_cr("rip = 0x%016lx", pc); | |
| 892 #ifndef PRODUCT | |
| 893 tty->cr(); | |
| 894 findpc(pc); | |
| 895 tty->cr(); | |
| 896 #endif | |
| 897 #define PRINT_REG(rax, value) \ | |
| 898 { tty->print("%s = ", #rax); os::print_location(tty, value); } | |
| 899 PRINT_REG(rax, regs[15]); | |
| 900 PRINT_REG(rbx, regs[12]); | |
| 901 PRINT_REG(rcx, regs[14]); | |
| 902 PRINT_REG(rdx, regs[13]); | |
| 903 PRINT_REG(rdi, regs[8]); | |
| 904 PRINT_REG(rsi, regs[9]); | |
| 905 PRINT_REG(rbp, regs[10]); | |
| 906 PRINT_REG(rsp, regs[11]); | |
| 907 PRINT_REG(r8 , regs[7]); | |
| 908 PRINT_REG(r9 , regs[6]); | |
| 909 PRINT_REG(r10, regs[5]); | |
| 910 PRINT_REG(r11, regs[4]); | |
| 911 PRINT_REG(r12, regs[3]); | |
| 912 PRINT_REG(r13, regs[2]); | |
| 913 PRINT_REG(r14, regs[1]); | |
| 914 PRINT_REG(r15, regs[0]); | |
| 915 #undef PRINT_REG | |
| 916 // Print some words near top of staack. | |
| 917 int64_t* rsp = (int64_t*) regs[11]; | |
| 918 int64_t* dump_sp = rsp; | |
| 919 for (int col1 = 0; col1 < 8; col1++) { | |
| 920 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); | |
| 921 os::print_location(tty, *dump_sp++); | |
| 922 } | |
| 923 for (int row = 0; row < 25; row++) { | |
| 924 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); | |
| 925 for (int col = 0; col < 4; col++) { | |
| 926 tty->print(" 0x%016lx", *dump_sp++); | |
| 927 } | |
| 928 tty->cr(); | |
| 929 } | |
| 930 // Print some instructions around pc: | |
| 931 Disassembler::decode((address)pc-64, (address)pc); | |
| 932 tty->print_cr("--------"); | |
| 933 Disassembler::decode((address)pc, (address)pc+32); | |
| 934 } | |
| 935 | |
| 936 #endif // _LP64 | |
| 937 | |
| 938 // Now versions that are common to 32/64 bit | |
| 939 | |
| 940 void MacroAssembler::addptr(Register dst, int32_t imm32) { | |
| 941 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32)); | |
| 942 } | |
| 943 | |
| 944 void MacroAssembler::addptr(Register dst, Register src) { | |
| 945 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); | |
| 946 } | |
| 947 | |
| 948 void MacroAssembler::addptr(Address dst, Register src) { | |
| 949 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); | |
| 950 } | |
| 951 | |
| 952 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) { | |
| 953 if (reachable(src)) { | |
| 954 Assembler::addsd(dst, as_Address(src)); | |
| 955 } else { | |
| 956 lea(rscratch1, src); | |
| 957 Assembler::addsd(dst, Address(rscratch1, 0)); | |
| 958 } | |
| 959 } | |
| 960 | |
| 961 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) { | |
| 962 if (reachable(src)) { | |
| 963 addss(dst, as_Address(src)); | |
| 964 } else { | |
| 965 lea(rscratch1, src); | |
| 966 addss(dst, Address(rscratch1, 0)); | |
| 967 } | |
| 968 } | |
| 969 | |
| 970 void MacroAssembler::align(int modulus) { | |
| 971 if (offset() % modulus != 0) { | |
| 972 nop(modulus - (offset() % modulus)); | |
| 973 } | |
| 974 } | |
| 975 | |
| 976 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) { | |
| 977 // Used in sign-masking with aligned address. | |
| 978 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 979 if (reachable(src)) { | |
| 980 Assembler::andpd(dst, as_Address(src)); | |
| 981 } else { | |
| 982 lea(rscratch1, src); | |
| 983 Assembler::andpd(dst, Address(rscratch1, 0)); | |
| 984 } | |
| 985 } | |
| 986 | |
| 987 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) { | |
| 988 // Used in sign-masking with aligned address. | |
| 989 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 990 if (reachable(src)) { | |
| 991 Assembler::andps(dst, as_Address(src)); | |
| 992 } else { | |
| 993 lea(rscratch1, src); | |
| 994 Assembler::andps(dst, Address(rscratch1, 0)); | |
| 995 } | |
| 996 } | |
| 997 | |
| 998 void MacroAssembler::andptr(Register dst, int32_t imm32) { | |
| 999 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32)); | |
| 1000 } | |
| 1001 | |
| 17780 | 1002 void MacroAssembler::atomic_incl(Address counter_addr) { |
| 1003 if (os::is_MP()) | |
| 1004 lock(); | |
| 1005 incrementl(counter_addr); | |
| 1006 } | |
| 1007 | |
| 1008 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register scr) { | |
|
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1009 if (reachable(counter_addr)) { |
| 17780 | 1010 atomic_incl(as_Address(counter_addr)); |
|
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1011 } else { |
| 17780 | 1012 lea(scr, counter_addr); |
| 1013 atomic_incl(Address(scr, 0)); | |
| 1014 } | |
| 1015 } | |
| 1016 | |
| 1017 #ifdef _LP64 | |
| 1018 void MacroAssembler::atomic_incq(Address counter_addr) { | |
| 1019 if (os::is_MP()) | |
| 1020 lock(); | |
| 1021 incrementq(counter_addr); | |
| 1022 } | |
| 1023 | |
| 1024 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register scr) { | |
| 1025 if (reachable(counter_addr)) { | |
| 1026 atomic_incq(as_Address(counter_addr)); | |
| 1027 } else { | |
| 1028 lea(scr, counter_addr); | |
| 1029 atomic_incq(Address(scr, 0)); | |
| 1030 } | |
| 1031 } | |
| 1032 #endif | |
| 7199 | 1033 |
| 1034 // Writes to stack successive pages until offset reached to check for | |
| 1035 // stack overflow + shadow pages. This clobbers tmp. | |
| 1036 void MacroAssembler::bang_stack_size(Register size, Register tmp) { | |
| 1037 movptr(tmp, rsp); | |
| 1038 // Bang stack for total size given plus shadow page size. | |
| 1039 // Bang one page at a time because large size can bang beyond yellow and | |
| 1040 // red zones. | |
| 1041 Label loop; | |
| 1042 bind(loop); | |
| 1043 movl(Address(tmp, (-os::vm_page_size())), size ); | |
| 1044 subptr(tmp, os::vm_page_size()); | |
| 1045 subl(size, os::vm_page_size()); | |
| 1046 jcc(Assembler::greater, loop); | |
| 1047 | |
| 1048 // Bang down shadow pages too. | |
|
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1049 // At this point, (tmp-0) is the last address touched, so don't |
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1050 // touch it again. (It was touched as (tmp-pagesize) but then tmp |
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1051 // was post-decremented.) Skip this address by starting at i=1, and |
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1052 // touch a few more pages below. N.B. It is important to touch all |
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1053 // the way down to and including i=StackShadowPages. |
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1054 for (int i = 1; i <= StackShadowPages; i++) { |
| 7199 | 1055 // this could be any sized move but this is can be a debugging crumb |
| 1056 // so the bigger the better. | |
| 1057 movptr(Address(tmp, (-i*os::vm_page_size())), size ); | |
| 1058 } | |
| 1059 } | |
| 1060 | |
|
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1061 int MacroAssembler::biased_locking_enter(Register lock_reg, |
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1062 Register obj_reg, |
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1063 Register swap_reg, |
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1064 Register tmp_reg, |
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1065 bool swap_reg_contains_mark, |
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1066 Label& done, |
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1067 Label* slow_case, |
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1068 BiasedLockingCounters* counters) { |
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1069 assert(UseBiasedLocking, "why call this otherwise?"); |
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1070 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq"); |
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1071 LP64_ONLY( assert(tmp_reg != noreg, "tmp_reg must be supplied"); ) |
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1072 bool need_tmp_reg = false; |
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1073 if (tmp_reg == noreg) { |
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1074 need_tmp_reg = true; |
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1075 tmp_reg = lock_reg; |
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1076 assert_different_registers(lock_reg, obj_reg, swap_reg); |
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1077 } else { |
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1078 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); |
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1079 } |
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1080 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); |
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1081 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); |
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1082 Address saved_mark_addr(lock_reg, 0); |
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1083 |
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1084 if (PrintBiasedLockingStatistics && counters == NULL) { |
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1085 counters = BiasedLocking::counters(); |
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1086 } |
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1087 // Biased locking |
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1088 // See whether the lock is currently biased toward our thread and |
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1089 // whether the epoch is still valid |
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1090 // Note that the runtime guarantees sufficient alignment of JavaThread |
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1091 // pointers to allow age to be placed into low bits |
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1092 // First check to see whether biasing is even enabled for this object |
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1093 Label cas_label; |
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1094 int null_check_offset = -1; |
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1095 if (!swap_reg_contains_mark) { |
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1096 null_check_offset = offset(); |
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1097 movptr(swap_reg, mark_addr); |
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1098 } |
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1099 if (need_tmp_reg) { |
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1100 push(tmp_reg); |
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1101 } |
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1102 movptr(tmp_reg, swap_reg); |
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1103 andptr(tmp_reg, markOopDesc::biased_lock_mask_in_place); |
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1104 cmpptr(tmp_reg, markOopDesc::biased_lock_pattern); |
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1105 if (need_tmp_reg) { |
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1106 pop(tmp_reg); |
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1107 } |
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1108 jcc(Assembler::notEqual, cas_label); |
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1109 // The bias pattern is present in the object's header. Need to check |
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1110 // whether the bias owner and the epoch are both still current. |
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1111 #ifndef _LP64 |
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1112 // Note that because there is no current thread register on x86_32 we |
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1113 // need to store off the mark word we read out of the object to |
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1114 // avoid reloading it and needing to recheck invariants below. This |
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1115 // store is unfortunate but it makes the overall code shorter and |
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1116 // simpler. |
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1117 movptr(saved_mark_addr, swap_reg); |
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1118 #endif |
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1119 if (need_tmp_reg) { |
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1120 push(tmp_reg); |
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1121 } |
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1122 if (swap_reg_contains_mark) { |
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1123 null_check_offset = offset(); |
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1124 } |
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1125 load_prototype_header(tmp_reg, obj_reg); |
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1126 #ifdef _LP64 |
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1127 orptr(tmp_reg, r15_thread); |
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1128 xorptr(tmp_reg, swap_reg); |
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1129 Register header_reg = tmp_reg; |
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1130 #else |
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1131 xorptr(tmp_reg, swap_reg); |
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1132 get_thread(swap_reg); |
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1133 xorptr(swap_reg, tmp_reg); |
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1134 Register header_reg = swap_reg; |
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1135 #endif |
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1136 andptr(header_reg, ~((int) markOopDesc::age_mask_in_place)); |
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1137 if (need_tmp_reg) { |
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1138 pop(tmp_reg); |
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1139 } |
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1140 if (counters != NULL) { |
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1141 cond_inc32(Assembler::zero, |
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1142 ExternalAddress((address) counters->biased_lock_entry_count_addr())); |
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1143 } |
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1144 jcc(Assembler::equal, done); |
|
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|
1145 |
|
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|
1146 Label try_revoke_bias; |
|
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|
1147 Label try_rebias; |
|
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|
1148 |
|
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|
1149 // At this point we know that the header has the bias pattern and |
|
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|
1150 // that we are not the bias owner in the current epoch. We need to |
|
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|
1151 // figure out more details about the state of the header in order to |
|
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|
1152 // know what operations can be legally performed on the object's |
|
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|
1153 // header. |
|
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|
1154 |
|
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|
1155 // If the low three bits in the xor result aren't clear, that means |
|
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|
1156 // the prototype header is no longer biased and we have to revoke |
|
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|
1157 // the bias on this object. |
|
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|
1158 testptr(header_reg, markOopDesc::biased_lock_mask_in_place); |
|
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|
1159 jccb(Assembler::notZero, try_revoke_bias); |
|
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|
1160 |
|
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|
1161 // Biasing is still enabled for this data type. See whether the |
|
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|
1162 // epoch of the current bias is still valid, meaning that the epoch |
|
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|
1163 // bits of the mark word are equal to the epoch bits of the |
|
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|
1164 // prototype header. (Note that the prototype header's epoch bits |
|
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|
1165 // only change at a safepoint.) If not, attempt to rebias the object |
|
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|
1166 // toward the current thread. Note that we must be absolutely sure |
|
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|
1167 // that the current epoch is invalid in order to do this because |
|
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|
1168 // otherwise the manipulations it performs on the mark word are |
|
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|
1169 // illegal. |
|
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|
1170 testptr(header_reg, markOopDesc::epoch_mask_in_place); |
|
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|
1171 jccb(Assembler::notZero, try_rebias); |
|
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|
1172 |
|
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|
1173 // The epoch of the current bias is still valid but we know nothing |
|
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|
1174 // about the owner; it might be set or it might be clear. Try to |
|
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|
1175 // acquire the bias of the object using an atomic operation. If this |
|
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|
1176 // fails we will go in to the runtime to revoke the object's bias. |
|
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|
1177 // Note that we first construct the presumed unbiased header so we |
|
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|
1178 // don't accidentally blow away another thread's valid bias. |
|
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|
1179 NOT_LP64( movptr(swap_reg, saved_mark_addr); ) |
|
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|
1180 andptr(swap_reg, |
|
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|
1181 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); |
|
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|
1182 if (need_tmp_reg) { |
|
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|
1183 push(tmp_reg); |
|
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|
1184 } |
|
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|
1185 #ifdef _LP64 |
|
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|
1186 movptr(tmp_reg, swap_reg); |
|
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|
1187 orptr(tmp_reg, r15_thread); |
|
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|
1188 #else |
|
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|
1189 get_thread(tmp_reg); |
|
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|
1190 orptr(tmp_reg, swap_reg); |
|
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|
1191 #endif |
|
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|
1192 if (os::is_MP()) { |
|
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|
1193 lock(); |
|
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|
1194 } |
|
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|
1195 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg |
|
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|
1196 if (need_tmp_reg) { |
|
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|
1197 pop(tmp_reg); |
|
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|
1198 } |
|
4d4ea046d32a
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changeset
|
1199 // If the biasing toward our thread failed, this means that |
|
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|
1200 // another thread succeeded in biasing it toward itself and we |
|
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|
1201 // need to revoke that bias. The revocation will occur in the |
|
4d4ea046d32a
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|
1202 // interpreter runtime in the slow case. |
|
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diff
changeset
|
1203 if (counters != NULL) { |
|
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kvn
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changeset
|
1204 cond_inc32(Assembler::zero, |
|
4d4ea046d32a
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parents:
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|
1205 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); |
|
4d4ea046d32a
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changeset
|
1206 } |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1207 if (slow_case != NULL) { |
|
4d4ea046d32a
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diff
changeset
|
1208 jcc(Assembler::notZero, *slow_case); |
|
4d4ea046d32a
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parents:
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changeset
|
1209 } |
|
4d4ea046d32a
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parents:
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changeset
|
1210 jmp(done); |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1211 |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1212 bind(try_rebias); |
|
4d4ea046d32a
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diff
changeset
|
1213 // At this point we know the epoch has expired, meaning that the |
|
4d4ea046d32a
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diff
changeset
|
1214 // current "bias owner", if any, is actually invalid. Under these |
|
4d4ea046d32a
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diff
changeset
|
1215 // circumstances _only_, we are allowed to use the current header's |
|
4d4ea046d32a
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diff
changeset
|
1216 // value as the comparison value when doing the cas to acquire the |
|
4d4ea046d32a
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diff
changeset
|
1217 // bias in the current epoch. In other words, we allow transfer of |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1218 // the bias from one thread to another directly in this situation. |
|
4d4ea046d32a
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diff
changeset
|
1219 // |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
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diff
changeset
|
1220 // FIXME: due to a lack of registers we currently blow away the age |
|
4d4ea046d32a
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kvn
parents:
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diff
changeset
|
1221 // bits in this situation. Should attempt to preserve them. |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1222 if (need_tmp_reg) { |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1223 push(tmp_reg); |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1224 } |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1225 load_prototype_header(tmp_reg, obj_reg); |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1226 #ifdef _LP64 |
|
4d4ea046d32a
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diff
changeset
|
1227 orptr(tmp_reg, r15_thread); |
|
4d4ea046d32a
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diff
changeset
|
1228 #else |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1229 get_thread(swap_reg); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
1230 orptr(tmp_reg, swap_reg); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
1231 movptr(swap_reg, saved_mark_addr); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
1232 #endif |
|
4d4ea046d32a
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diff
changeset
|
1233 if (os::is_MP()) { |
|
4d4ea046d32a
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diff
changeset
|
1234 lock(); |
|
4d4ea046d32a
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diff
changeset
|
1235 } |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
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diff
changeset
|
1236 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1237 if (need_tmp_reg) { |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
13424
diff
changeset
|
1238 pop(tmp_reg); |
|
4d4ea046d32a
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kvn
parents:
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diff
changeset
|
1239 } |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1240 // If the biasing toward our thread failed, then another thread |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1241 // succeeded in biasing it toward itself and we need to revoke that |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1242 // bias. The revocation will occur in the runtime in the slow case. |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1243 if (counters != NULL) { |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
13424
diff
changeset
|
1244 cond_inc32(Assembler::zero, |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
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diff
changeset
|
1245 ExternalAddress((address) counters->rebiased_lock_entry_count_addr())); |
|
4d4ea046d32a
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kvn
parents:
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diff
changeset
|
1246 } |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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parents:
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diff
changeset
|
1247 if (slow_case != NULL) { |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
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diff
changeset
|
1248 jcc(Assembler::notZero, *slow_case); |
|
4d4ea046d32a
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diff
changeset
|
1249 } |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
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diff
changeset
|
1250 jmp(done); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
parents:
13424
diff
changeset
|
1251 |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1252 bind(try_revoke_bias); |
|
4d4ea046d32a
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parents:
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diff
changeset
|
1253 // The prototype mark in the klass doesn't have the bias bit set any |
|
4d4ea046d32a
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diff
changeset
|
1254 // more, indicating that objects of this data type are not supposed |
|
4d4ea046d32a
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1255 // to be biased any more. We are going to try to reset the mark of |
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1256 // this object to the prototype value and fall through to the |
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1257 // CAS-based locking scheme. Note that if our CAS fails, it means |
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1258 // that another thread raced us for the privilege of revoking the |
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1259 // bias of this particular object, so it's okay to continue in the |
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1260 // normal locking code. |
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1261 // |
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1262 // FIXME: due to a lack of registers we currently blow away the age |
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1263 // bits in this situation. Should attempt to preserve them. |
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1264 NOT_LP64( movptr(swap_reg, saved_mark_addr); ) |
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1265 if (need_tmp_reg) { |
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1266 push(tmp_reg); |
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1267 } |
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1268 load_prototype_header(tmp_reg, obj_reg); |
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1269 if (os::is_MP()) { |
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1270 lock(); |
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1271 } |
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1272 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg |
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1273 if (need_tmp_reg) { |
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1274 pop(tmp_reg); |
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1275 } |
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1276 // Fall through to the normal CAS-based lock, because no matter what |
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1277 // the result of the above CAS, some thread must have succeeded in |
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1278 // removing the bias bit from the object's header. |
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1279 if (counters != NULL) { |
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1280 cond_inc32(Assembler::zero, |
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1281 ExternalAddress((address) counters->revoked_lock_entry_count_addr())); |
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1282 } |
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1283 |
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1284 bind(cas_label); |
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1285 |
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1286 return null_check_offset; |
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1287 } |
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1288 |
| 7199 | 1289 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) { |
| 1290 assert(UseBiasedLocking, "why call this otherwise?"); | |
| 1291 | |
| 1292 // Check for biased locking unlock case, which is a no-op | |
| 1293 // Note: we do not have to check the thread ID for two reasons. | |
| 1294 // First, the interpreter checks for IllegalMonitorStateException at | |
| 1295 // a higher level. Second, if the bias was revoked while we held the | |
| 1296 // lock, the object could not be rebiased toward another thread, so | |
| 1297 // the bias bit would be clear. | |
| 1298 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); | |
| 1299 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place); | |
| 1300 cmpptr(temp_reg, markOopDesc::biased_lock_pattern); | |
| 1301 jcc(Assembler::equal, done); | |
| 1302 } | |
| 1303 | |
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1304 #ifdef COMPILER2 |
| 17780 | 1305 |
| 1306 #if INCLUDE_RTM_OPT | |
| 1307 | |
| 1308 // Update rtm_counters based on abort status | |
| 1309 // input: abort_status | |
| 1310 // rtm_counters (RTMLockingCounters*) | |
| 1311 // flags are killed | |
| 1312 void MacroAssembler::rtm_counters_update(Register abort_status, Register rtm_counters) { | |
| 1313 | |
| 1314 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abort_count_offset())); | |
| 1315 if (PrintPreciseRTMLockingStatistics) { | |
| 1316 for (int i = 0; i < RTMLockingCounters::ABORT_STATUS_LIMIT; i++) { | |
| 1317 Label check_abort; | |
| 1318 testl(abort_status, (1<<i)); | |
| 1319 jccb(Assembler::equal, check_abort); | |
| 1320 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abortX_count_offset() + (i * sizeof(uintx)))); | |
| 1321 bind(check_abort); | |
| 1322 } | |
| 1323 } | |
| 1324 } | |
| 1325 | |
| 1326 // Branch if (random & (count-1) != 0), count is 2^n | |
| 1327 // tmp, scr and flags are killed | |
| 1328 void MacroAssembler::branch_on_random_using_rdtsc(Register tmp, Register scr, int count, Label& brLabel) { | |
| 1329 assert(tmp == rax, ""); | |
| 1330 assert(scr == rdx, ""); | |
| 1331 rdtsc(); // modifies EDX:EAX | |
| 1332 andptr(tmp, count-1); | |
| 1333 jccb(Assembler::notZero, brLabel); | |
| 1334 } | |
| 1335 | |
| 1336 // Perform abort ratio calculation, set no_rtm bit if high ratio | |
| 1337 // input: rtm_counters_Reg (RTMLockingCounters* address) | |
| 1338 // tmpReg, rtm_counters_Reg and flags are killed | |
| 1339 void MacroAssembler::rtm_abort_ratio_calculation(Register tmpReg, | |
| 1340 Register rtm_counters_Reg, | |
| 1341 RTMLockingCounters* rtm_counters, | |
| 1342 Metadata* method_data) { | |
| 1343 Label L_done, L_check_always_rtm1, L_check_always_rtm2; | |
| 1344 | |
| 1345 if (RTMLockingCalculationDelay > 0) { | |
| 1346 // Delay calculation | |
| 1347 movptr(tmpReg, ExternalAddress((address) RTMLockingCounters::rtm_calculation_flag_addr()), tmpReg); | |
| 1348 testptr(tmpReg, tmpReg); | |
| 1349 jccb(Assembler::equal, L_done); | |
| 1350 } | |
| 1351 // Abort ratio calculation only if abort_count > RTMAbortThreshold | |
| 1352 // Aborted transactions = abort_count * 100 | |
| 1353 // All transactions = total_count * RTMTotalCountIncrRate | |
| 1354 // Set no_rtm bit if (Aborted transactions >= All transactions * RTMAbortRatio) | |
| 1355 | |
| 1356 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::abort_count_offset())); | |
| 1357 cmpptr(tmpReg, RTMAbortThreshold); | |
| 1358 jccb(Assembler::below, L_check_always_rtm2); | |
| 1359 imulptr(tmpReg, tmpReg, 100); | |
| 1360 | |
| 1361 Register scrReg = rtm_counters_Reg; | |
| 1362 movptr(scrReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset())); | |
| 1363 imulptr(scrReg, scrReg, RTMTotalCountIncrRate); | |
| 1364 imulptr(scrReg, scrReg, RTMAbortRatio); | |
| 1365 cmpptr(tmpReg, scrReg); | |
| 1366 jccb(Assembler::below, L_check_always_rtm1); | |
| 1367 if (method_data != NULL) { | |
| 1368 // set rtm_state to "no rtm" in MDO | |
| 1369 mov_metadata(tmpReg, method_data); | |
| 1370 if (os::is_MP()) { | |
| 1371 lock(); | |
| 1372 } | |
| 1373 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), NoRTM); | |
| 1374 } | |
| 1375 jmpb(L_done); | |
| 1376 bind(L_check_always_rtm1); | |
| 1377 // Reload RTMLockingCounters* address | |
| 1378 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters)); | |
| 1379 bind(L_check_always_rtm2); | |
| 1380 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset())); | |
| 1381 cmpptr(tmpReg, RTMLockingThreshold / RTMTotalCountIncrRate); | |
| 1382 jccb(Assembler::below, L_done); | |
| 1383 if (method_data != NULL) { | |
| 1384 // set rtm_state to "always rtm" in MDO | |
| 1385 mov_metadata(tmpReg, method_data); | |
| 1386 if (os::is_MP()) { | |
| 1387 lock(); | |
| 1388 } | |
| 1389 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), UseRTM); | |
| 1390 } | |
| 1391 bind(L_done); | |
| 1392 } | |
| 1393 | |
| 1394 // Update counters and perform abort ratio calculation | |
| 1395 // input: abort_status_Reg | |
| 1396 // rtm_counters_Reg, flags are killed | |
| 1397 void MacroAssembler::rtm_profiling(Register abort_status_Reg, | |
| 1398 Register rtm_counters_Reg, | |
| 1399 RTMLockingCounters* rtm_counters, | |
| 1400 Metadata* method_data, | |
| 1401 bool profile_rtm) { | |
| 1402 | |
| 1403 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); | |
| 1404 // update rtm counters based on rax value at abort | |
| 1405 // reads abort_status_Reg, updates flags | |
| 1406 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters)); | |
| 1407 rtm_counters_update(abort_status_Reg, rtm_counters_Reg); | |
| 1408 if (profile_rtm) { | |
| 1409 // Save abort status because abort_status_Reg is used by following code. | |
| 1410 if (RTMRetryCount > 0) { | |
| 1411 push(abort_status_Reg); | |
| 1412 } | |
| 1413 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); | |
| 1414 rtm_abort_ratio_calculation(abort_status_Reg, rtm_counters_Reg, rtm_counters, method_data); | |
| 1415 // restore abort status | |
| 1416 if (RTMRetryCount > 0) { | |
| 1417 pop(abort_status_Reg); | |
| 1418 } | |
| 1419 } | |
| 1420 } | |
| 1421 | |
| 1422 // Retry on abort if abort's status is 0x6: can retry (0x2) | memory conflict (0x4) | |
| 1423 // inputs: retry_count_Reg | |
| 1424 // : abort_status_Reg | |
| 1425 // output: retry_count_Reg decremented by 1 | |
| 1426 // flags are killed | |
| 1427 void MacroAssembler::rtm_retry_lock_on_abort(Register retry_count_Reg, Register abort_status_Reg, Label& retryLabel) { | |
| 1428 Label doneRetry; | |
| 1429 assert(abort_status_Reg == rax, ""); | |
| 1430 // The abort reason bits are in eax (see all states in rtmLocking.hpp) | |
| 1431 // 0x6 = conflict on which we can retry (0x2) | memory conflict (0x4) | |
| 1432 // if reason is in 0x6 and retry count != 0 then retry | |
| 1433 andptr(abort_status_Reg, 0x6); | |
| 1434 jccb(Assembler::zero, doneRetry); | |
| 1435 testl(retry_count_Reg, retry_count_Reg); | |
| 1436 jccb(Assembler::zero, doneRetry); | |
| 1437 pause(); | |
| 1438 decrementl(retry_count_Reg); | |
| 1439 jmp(retryLabel); | |
| 1440 bind(doneRetry); | |
| 1441 } | |
| 1442 | |
| 1443 // Spin and retry if lock is busy, | |
| 1444 // inputs: box_Reg (monitor address) | |
| 1445 // : retry_count_Reg | |
| 1446 // output: retry_count_Reg decremented by 1 | |
| 1447 // : clear z flag if retry count exceeded | |
| 1448 // tmp_Reg, scr_Reg, flags are killed | |
| 1449 void MacroAssembler::rtm_retry_lock_on_busy(Register retry_count_Reg, Register box_Reg, | |
| 1450 Register tmp_Reg, Register scr_Reg, Label& retryLabel) { | |
| 1451 Label SpinLoop, SpinExit, doneRetry; | |
| 1452 // Clean monitor_value bit to get valid pointer | |
| 1453 int owner_offset = ObjectMonitor::owner_offset_in_bytes() - markOopDesc::monitor_value; | |
| 1454 | |
| 1455 testl(retry_count_Reg, retry_count_Reg); | |
| 1456 jccb(Assembler::zero, doneRetry); | |
| 1457 decrementl(retry_count_Reg); | |
| 1458 movptr(scr_Reg, RTMSpinLoopCount); | |
| 1459 | |
| 1460 bind(SpinLoop); | |
| 1461 pause(); | |
| 1462 decrementl(scr_Reg); | |
| 1463 jccb(Assembler::lessEqual, SpinExit); | |
| 1464 movptr(tmp_Reg, Address(box_Reg, owner_offset)); | |
| 1465 testptr(tmp_Reg, tmp_Reg); | |
| 1466 jccb(Assembler::notZero, SpinLoop); | |
| 1467 | |
| 1468 bind(SpinExit); | |
| 1469 jmp(retryLabel); | |
| 1470 bind(doneRetry); | |
| 1471 incrementl(retry_count_Reg); // clear z flag | |
| 1472 } | |
| 1473 | |
| 1474 // Use RTM for normal stack locks | |
| 1475 // Input: objReg (object to lock) | |
| 1476 void MacroAssembler::rtm_stack_locking(Register objReg, Register tmpReg, Register scrReg, | |
| 1477 Register retry_on_abort_count_Reg, | |
| 1478 RTMLockingCounters* stack_rtm_counters, | |
| 1479 Metadata* method_data, bool profile_rtm, | |
| 1480 Label& DONE_LABEL, Label& IsInflated) { | |
| 1481 assert(UseRTMForStackLocks, "why call this otherwise?"); | |
| 1482 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking"); | |
| 1483 assert(tmpReg == rax, ""); | |
| 1484 assert(scrReg == rdx, ""); | |
| 1485 Label L_rtm_retry, L_decrement_retry, L_on_abort; | |
| 1486 | |
| 1487 if (RTMRetryCount > 0) { | |
| 1488 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort | |
| 1489 bind(L_rtm_retry); | |
| 1490 } | |
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1491 movptr(tmpReg, Address(objReg, 0)); |
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1492 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased |
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1493 jcc(Assembler::notZero, IsInflated); |
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1494 |
| 17780 | 1495 if (PrintPreciseRTMLockingStatistics || profile_rtm) { |
| 1496 Label L_noincrement; | |
| 1497 if (RTMTotalCountIncrRate > 1) { | |
| 1498 // tmpReg, scrReg and flags are killed | |
| 1499 branch_on_random_using_rdtsc(tmpReg, scrReg, (int)RTMTotalCountIncrRate, L_noincrement); | |
| 1500 } | |
| 1501 assert(stack_rtm_counters != NULL, "should not be NULL when profiling RTM"); | |
| 1502 atomic_incptr(ExternalAddress((address)stack_rtm_counters->total_count_addr()), scrReg); | |
| 1503 bind(L_noincrement); | |
| 1504 } | |
| 1505 xbegin(L_on_abort); | |
| 1506 movptr(tmpReg, Address(objReg, 0)); // fetch markword | |
| 1507 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits | |
| 1508 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked | |
| 1509 jcc(Assembler::equal, DONE_LABEL); // all done if unlocked | |
| 1510 | |
| 1511 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX | |
| 1512 if (UseRTMXendForLockBusy) { | |
| 1513 xend(); | |
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1514 movptr(abort_status_Reg, 0x2); // Set the abort status to 2 (so we can retry) |
| 17780 | 1515 jmp(L_decrement_retry); |
| 1516 } | |
| 1517 else { | |
| 1518 xabort(0); | |
| 1519 } | |
| 1520 bind(L_on_abort); | |
| 1521 if (PrintPreciseRTMLockingStatistics || profile_rtm) { | |
| 1522 rtm_profiling(abort_status_Reg, scrReg, stack_rtm_counters, method_data, profile_rtm); | |
| 1523 } | |
| 1524 bind(L_decrement_retry); | |
| 1525 if (RTMRetryCount > 0) { | |
| 1526 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4) | |
| 1527 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry); | |
| 1528 } | |
| 1529 } | |
| 1530 | |
| 1531 // Use RTM for inflating locks | |
| 1532 // inputs: objReg (object to lock) | |
| 1533 // boxReg (on-stack box address (displaced header location) - KILLED) | |
| 1534 // tmpReg (ObjectMonitor address + 2(monitor_value)) | |
| 1535 void MacroAssembler::rtm_inflated_locking(Register objReg, Register boxReg, Register tmpReg, | |
| 1536 Register scrReg, Register retry_on_busy_count_Reg, | |
| 1537 Register retry_on_abort_count_Reg, | |
| 1538 RTMLockingCounters* rtm_counters, | |
| 1539 Metadata* method_data, bool profile_rtm, | |
| 1540 Label& DONE_LABEL) { | |
| 1541 assert(UseRTMLocking, "why call this otherwise?"); | |
| 1542 assert(tmpReg == rax, ""); | |
| 1543 assert(scrReg == rdx, ""); | |
| 1544 Label L_rtm_retry, L_decrement_retry, L_on_abort; | |
| 1545 // Clean monitor_value bit to get valid pointer | |
| 1546 int owner_offset = ObjectMonitor::owner_offset_in_bytes() - markOopDesc::monitor_value; | |
| 1547 | |
| 1548 // Without cast to int32_t a movptr will destroy r10 which is typically obj | |
| 1549 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); | |
| 1550 movptr(boxReg, tmpReg); // Save ObjectMonitor address | |
| 1551 | |
| 1552 if (RTMRetryCount > 0) { | |
| 1553 movl(retry_on_busy_count_Reg, RTMRetryCount); // Retry on lock busy | |
| 1554 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort | |
| 1555 bind(L_rtm_retry); | |
| 1556 } | |
| 1557 if (PrintPreciseRTMLockingStatistics || profile_rtm) { | |
| 1558 Label L_noincrement; | |
| 1559 if (RTMTotalCountIncrRate > 1) { | |
| 1560 // tmpReg, scrReg and flags are killed | |
| 1561 branch_on_random_using_rdtsc(tmpReg, scrReg, (int)RTMTotalCountIncrRate, L_noincrement); | |
| 1562 } | |
| 1563 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); | |
| 1564 atomic_incptr(ExternalAddress((address)rtm_counters->total_count_addr()), scrReg); | |
| 1565 bind(L_noincrement); | |
| 1566 } | |
| 1567 xbegin(L_on_abort); | |
| 1568 movptr(tmpReg, Address(objReg, 0)); | |
| 1569 movptr(tmpReg, Address(tmpReg, owner_offset)); | |
| 1570 testptr(tmpReg, tmpReg); | |
| 1571 jcc(Assembler::zero, DONE_LABEL); | |
| 1572 if (UseRTMXendForLockBusy) { | |
| 1573 xend(); | |
| 1574 jmp(L_decrement_retry); | |
| 1575 } | |
| 1576 else { | |
| 1577 xabort(0); | |
| 1578 } | |
| 1579 bind(L_on_abort); | |
| 1580 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX | |
| 1581 if (PrintPreciseRTMLockingStatistics || profile_rtm) { | |
| 1582 rtm_profiling(abort_status_Reg, scrReg, rtm_counters, method_data, profile_rtm); | |
| 1583 } | |
| 1584 if (RTMRetryCount > 0) { | |
| 1585 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4) | |
| 1586 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry); | |
| 1587 } | |
| 1588 | |
| 1589 movptr(tmpReg, Address(boxReg, owner_offset)) ; | |
| 1590 testptr(tmpReg, tmpReg) ; | |
| 1591 jccb(Assembler::notZero, L_decrement_retry) ; | |
| 1592 | |
| 1593 // Appears unlocked - try to swing _owner from null to non-null. | |
| 1594 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. | |
| 1595 #ifdef _LP64 | |
| 1596 Register threadReg = r15_thread; | |
| 1597 #else | |
| 1598 get_thread(scrReg); | |
| 1599 Register threadReg = scrReg; | |
| 1600 #endif | |
| 1601 if (os::is_MP()) { | |
| 1602 lock(); | |
| 1603 } | |
| 1604 cmpxchgptr(threadReg, Address(boxReg, owner_offset)); // Updates tmpReg | |
| 1605 | |
| 1606 if (RTMRetryCount > 0) { | |
| 1607 // success done else retry | |
| 1608 jccb(Assembler::equal, DONE_LABEL) ; | |
| 1609 bind(L_decrement_retry); | |
| 1610 // Spin and retry if lock is busy. | |
| 1611 rtm_retry_lock_on_busy(retry_on_busy_count_Reg, boxReg, tmpReg, scrReg, L_rtm_retry); | |
| 1612 } | |
| 1613 else { | |
| 1614 bind(L_decrement_retry); | |
| 1615 } | |
| 1616 } | |
| 1617 | |
| 1618 #endif // INCLUDE_RTM_OPT | |
| 1619 | |
|
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|
1620 // Fast_Lock and Fast_Unlock used by C2 |
|
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|
1621 |
|
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|
1622 // Because the transitions from emitted code to the runtime |
|
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|
1623 // monitorenter/exit helper stubs are so slow it's critical that |
|
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|
1624 // we inline both the stack-locking fast-path and the inflated fast path. |
|
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|
1625 // |
|
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|
1626 // See also: cmpFastLock and cmpFastUnlock. |
|
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|
1627 // |
|
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|
1628 // What follows is a specialized inline transliteration of the code |
|
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|
1629 // in slow_enter() and slow_exit(). If we're concerned about I$ bloat |
|
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|
1630 // another option would be to emit TrySlowEnter and TrySlowExit methods |
|
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|
1631 // at startup-time. These methods would accept arguments as |
|
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|
1632 // (rax,=Obj, rbx=Self, rcx=box, rdx=Scratch) and return success-failure |
|
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|
1633 // indications in the icc.ZFlag. Fast_Lock and Fast_Unlock would simply |
|
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|
1634 // marshal the arguments and emit calls to TrySlowEnter and TrySlowExit. |
|
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|
1635 // In practice, however, the # of lock sites is bounded and is usually small. |
|
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|
1636 // Besides the call overhead, TrySlowEnter and TrySlowExit might suffer |
|
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|
1637 // if the processor uses simple bimodal branch predictors keyed by EIP |
|
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|
1638 // Since the helper routines would be called from multiple synchronization |
|
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|
1639 // sites. |
|
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|
1640 // |
|
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|
1641 // An even better approach would be write "MonitorEnter()" and "MonitorExit()" |
|
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|
1642 // in java - using j.u.c and unsafe - and just bind the lock and unlock sites |
|
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|
1643 // to those specialized methods. That'd give us a mostly platform-independent |
|
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|
1644 // implementation that the JITs could optimize and inline at their pleasure. |
|
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|
1645 // Done correctly, the only time we'd need to cross to native could would be |
|
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|
1646 // to park() or unpark() threads. We'd also need a few more unsafe operators |
|
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|
1647 // to (a) prevent compiler-JIT reordering of non-volatile accesses, and |
|
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|
1648 // (b) explicit barriers or fence operations. |
|
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|
1649 // |
|
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|
1650 // TODO: |
|
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|
1651 // |
|
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|
1652 // * Arrange for C2 to pass "Self" into Fast_Lock and Fast_Unlock in one of the registers (scr). |
|
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|
1653 // This avoids manifesting the Self pointer in the Fast_Lock and Fast_Unlock terminals. |
|
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|
1654 // Given TLAB allocation, Self is usually manifested in a register, so passing it into |
|
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|
1655 // the lock operators would typically be faster than reifying Self. |
|
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|
1656 // |
|
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|
1657 // * Ideally I'd define the primitives as: |
|
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|
1658 // fast_lock (nax Obj, nax box, EAX tmp, nax scr) where box, tmp and scr are KILLED. |
|
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|
1659 // fast_unlock (nax Obj, EAX box, nax tmp) where box and tmp are KILLED |
|
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|
1660 // Unfortunately ADLC bugs prevent us from expressing the ideal form. |
|
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|
1661 // Instead, we're stuck with a rather awkward and brittle register assignments below. |
|
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|
1662 // Furthermore the register assignments are overconstrained, possibly resulting in |
|
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|
1663 // sub-optimal code near the synchronization site. |
|
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|
1664 // |
|
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|
1665 // * Eliminate the sp-proximity tests and just use "== Self" tests instead. |
|
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|
1666 // Alternately, use a better sp-proximity test. |
|
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|
1667 // |
|
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|
1668 // * Currently ObjectMonitor._Owner can hold either an sp value or a (THREAD *) value. |
|
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|
1669 // Either one is sufficient to uniquely identify a thread. |
|
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|
1670 // TODO: eliminate use of sp in _owner and use get_thread(tr) instead. |
|
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|
1671 // |
|
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|
1672 // * Intrinsify notify() and notifyAll() for the common cases where the |
|
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|
1673 // object is locked by the calling thread but the waitlist is empty. |
|
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|
1674 // avoid the expensive JNI call to JVM_Notify() and JVM_NotifyAll(). |
|
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|
1675 // |
|
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|
1676 // * use jccb and jmpb instead of jcc and jmp to improve code density. |
|
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|
1677 // But beware of excessive branch density on AMD Opterons. |
|
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|
1678 // |
|
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|
1679 // * Both Fast_Lock and Fast_Unlock set the ICC.ZF to indicate success |
|
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|
1680 // or failure of the fast-path. If the fast-path fails then we pass |
|
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|
1681 // control to the slow-path, typically in C. In Fast_Lock and |
|
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|
1682 // Fast_Unlock we often branch to DONE_LABEL, just to find that C2 |
|
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|
1683 // will emit a conditional branch immediately after the node. |
|
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|
1684 // So we have branches to branches and lots of ICC.ZF games. |
|
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|
1685 // Instead, it might be better to have C2 pass a "FailureLabel" |
|
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|
1686 // into Fast_Lock and Fast_Unlock. In the case of success, control |
|
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|
1687 // will drop through the node. ICC.ZF is undefined at exit. |
|
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|
1688 // In the case of failure, the node will branch directly to the |
|
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|
1689 // FailureLabel |
|
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|
1690 |
|
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|
1691 |
|
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|
1692 // obj: object to lock |
|
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|
1693 // box: on-stack box address (displaced header location) - KILLED |
|
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|
1694 // rax,: tmp -- KILLED |
|
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|
1695 // scr: tmp -- KILLED |
| 17780 | 1696 void MacroAssembler::fast_lock(Register objReg, Register boxReg, Register tmpReg, |
| 1697 Register scrReg, Register cx1Reg, Register cx2Reg, | |
| 1698 BiasedLockingCounters* counters, | |
| 1699 RTMLockingCounters* rtm_counters, | |
| 1700 RTMLockingCounters* stack_rtm_counters, | |
| 1701 Metadata* method_data, | |
| 1702 bool use_rtm, bool profile_rtm) { | |
|
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|
1703 // Ensure the register assignents are disjoint |
| 17780 | 1704 assert(tmpReg == rax, ""); |
| 1705 | |
| 1706 if (use_rtm) { | |
| 1707 assert_different_registers(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg); | |
| 1708 } else { | |
| 1709 assert(cx1Reg == noreg, ""); | |
| 1710 assert(cx2Reg == noreg, ""); | |
| 1711 assert_different_registers(objReg, boxReg, tmpReg, scrReg); | |
| 1712 } | |
|
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|
1713 |
|
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|
1714 if (counters != NULL) { |
| 17780 | 1715 atomic_incl(ExternalAddress((address)counters->total_entry_count_addr()), scrReg); |
|
17714
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|
1716 } |
|
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|
1717 if (EmitSync & 1) { |
|
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|
1718 // set box->dhw = unused_mark (3) |
|
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|
1719 // Force all sync thru slow-path: slow_enter() and slow_exit() |
|
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|
1720 movptr (Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); |
|
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|
1721 cmpptr (rsp, (int32_t)NULL_WORD); |
|
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|
1722 } else |
|
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|
1723 if (EmitSync & 2) { |
|
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|
1724 Label DONE_LABEL ; |
|
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|
1725 if (UseBiasedLocking) { |
|
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changeset
|
1726 // Note: tmpReg maps to the swap_reg argument and scrReg to the tmp_reg argument. |
|
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|
1727 biased_locking_enter(boxReg, objReg, tmpReg, scrReg, false, DONE_LABEL, NULL, counters); |
|
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|
1728 } |
|
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|
1729 |
|
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|
1730 movptr(tmpReg, Address(objReg, 0)); // fetch markword |
|
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|
1731 orptr (tmpReg, 0x1); |
|
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|
1732 movptr(Address(boxReg, 0), tmpReg); // Anticipate successful CAS |
|
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1733 if (os::is_MP()) { |
|
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|
1734 lock(); |
|
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|
1735 } |
|
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|
1736 cmpxchgptr(boxReg, Address(objReg, 0)); // Updates tmpReg |
|
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1737 jccb(Assembler::equal, DONE_LABEL); |
|
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|
1738 // Recursive locking |
|
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|
1739 subptr(tmpReg, rsp); |
|
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1740 andptr(tmpReg, (int32_t) (NOT_LP64(0xFFFFF003) LP64_ONLY(7 - os::vm_page_size())) ); |
|
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|
1741 movptr(Address(boxReg, 0), tmpReg); |
|
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|
1742 bind(DONE_LABEL); |
|
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|
1743 } else { |
|
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|
1744 // Possible cases that we'll encounter in fast_lock |
|
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|
1745 // ------------------------------------------------ |
|
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|
1746 // * Inflated |
|
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|
1747 // -- unlocked |
|
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|
1748 // -- Locked |
|
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1749 // = by self |
|
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|
1750 // = by other |
|
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|
1751 // * biased |
|
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1752 // -- by Self |
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1753 // -- by other |
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|
1754 // * neutral |
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|
1755 // * stack-locked |
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1756 // -- by self |
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|
1757 // = sp-proximity test hits |
|
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1758 // = sp-proximity test generates false-negative |
|
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|
1759 // -- by other |
|
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|
1760 // |
|
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|
1761 |
|
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|
1762 Label IsInflated, DONE_LABEL; |
|
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|
1763 |
|
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|
1764 // it's stack-locked, biased or neutral |
|
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|
1765 // TODO: optimize away redundant LDs of obj->mark and improve the markword triage |
|
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|
1766 // order to reduce the number of conditional branches in the most common cases. |
|
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|
1767 // Beware -- there's a subtle invariant that fetch of the markword |
|
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|
1768 // at [FETCH], below, will never observe a biased encoding (*101b). |
|
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|
1769 // If this invariant is not held we risk exclusion (safety) failure. |
|
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|
1770 if (UseBiasedLocking && !UseOptoBiasInlining) { |
|
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|
1771 biased_locking_enter(boxReg, objReg, tmpReg, scrReg, true, DONE_LABEL, NULL, counters); |
|
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|
1772 } |
|
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|
1773 |
| 17780 | 1774 #if INCLUDE_RTM_OPT |
| 1775 if (UseRTMForStackLocks && use_rtm) { | |
| 1776 rtm_stack_locking(objReg, tmpReg, scrReg, cx2Reg, | |
| 1777 stack_rtm_counters, method_data, profile_rtm, | |
| 1778 DONE_LABEL, IsInflated); | |
| 1779 } | |
| 1780 #endif // INCLUDE_RTM_OPT | |
| 1781 | |
|
17714
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|
1782 movptr(tmpReg, Address(objReg, 0)); // [FETCH] |
| 17780 | 1783 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased |
| 1784 jccb(Assembler::notZero, IsInflated); | |
|
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|
1785 |
|
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|
1786 // Attempt stack-locking ... |
| 17780 | 1787 orptr (tmpReg, markOopDesc::unlocked_value); |
|
17714
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|
1788 movptr(Address(boxReg, 0), tmpReg); // Anticipate successful CAS |
|
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|
1789 if (os::is_MP()) { |
|
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|
1790 lock(); |
|
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|
1791 } |
|
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|
1792 cmpxchgptr(boxReg, Address(objReg, 0)); // Updates tmpReg |
|
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|
1793 if (counters != NULL) { |
|
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|
1794 cond_inc32(Assembler::equal, |
|
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|
1795 ExternalAddress((address)counters->fast_path_entry_count_addr())); |
|
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|
1796 } |
| 17780 | 1797 jcc(Assembler::equal, DONE_LABEL); // Success |
| 1798 | |
| 1799 // Recursive locking. | |
| 1800 // The object is stack-locked: markword contains stack pointer to BasicLock. | |
| 1801 // Locked by current thread if difference with current SP is less than one page. | |
|
17714
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|
1802 subptr(tmpReg, rsp); |
| 17780 | 1803 // Next instruction set ZFlag == 1 (Success) if difference is less then one page. |
|
17714
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|
1804 andptr(tmpReg, (int32_t) (NOT_LP64(0xFFFFF003) LP64_ONLY(7 - os::vm_page_size())) ); |
|
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|
1805 movptr(Address(boxReg, 0), tmpReg); |
|
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|
1806 if (counters != NULL) { |
|
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|
1807 cond_inc32(Assembler::equal, |
|
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|
1808 ExternalAddress((address)counters->fast_path_entry_count_addr())); |
|
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|
1809 } |
| 17780 | 1810 jmp(DONE_LABEL); |
|
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|
1811 |
|
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|
1812 bind(IsInflated); |
| 17780 | 1813 // The object is inflated. tmpReg contains pointer to ObjectMonitor* + 2(monitor_value) |
| 1814 | |
| 1815 #if INCLUDE_RTM_OPT | |
| 1816 // Use the same RTM locking code in 32- and 64-bit VM. | |
| 1817 if (use_rtm) { | |
| 1818 rtm_inflated_locking(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg, | |
| 1819 rtm_counters, method_data, profile_rtm, DONE_LABEL); | |
| 1820 } else { | |
| 1821 #endif // INCLUDE_RTM_OPT | |
| 1822 | |
|
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|
1823 #ifndef _LP64 |
|
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|
1824 // The object is inflated. |
|
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|
1825 // |
|
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|
1826 // TODO-FIXME: eliminate the ugly use of manifest constants: |
|
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|
1827 // Use markOopDesc::monitor_value instead of "2". |
|
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|
1828 // use markOop::unused_mark() instead of "3". |
|
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|
1829 // The tmpReg value is an objectMonitor reference ORed with |
|
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|
1830 // markOopDesc::monitor_value (2). We can either convert tmpReg to an |
|
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|
1831 // objectmonitor pointer by masking off the "2" bit or we can just |
|
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|
1832 // use tmpReg as an objectmonitor pointer but bias the objectmonitor |
|
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|
1833 // field offsets with "-2" to compensate for and annul the low-order tag bit. |
|
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|
1834 // |
|
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|
1835 // I use the latter as it avoids AGI stalls. |
|
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|
1836 // As such, we write "mov r, [tmpReg+OFFSETOF(Owner)-2]" |
|
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|
1837 // instead of "mov r, [tmpReg+OFFSETOF(Owner)]". |
|
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|
1838 // |
|
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|
1839 #define OFFSET_SKEWED(f) ((ObjectMonitor::f ## _offset_in_bytes())-2) |
|
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|
1840 |
|
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|
1841 // boxReg refers to the on-stack BasicLock in the current frame. |
|
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|
1842 // We'd like to write: |
|
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|
1843 // set box->_displaced_header = markOop::unused_mark(). Any non-0 value suffices. |
|
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|
1844 // This is convenient but results a ST-before-CAS penalty. The following CAS suffers |
|
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|
1845 // additional latency as we have another ST in the store buffer that must drain. |
|
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|
1846 |
|
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|
1847 if (EmitSync & 8192) { |
|
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|
1848 movptr(Address(boxReg, 0), 3); // results in ST-before-CAS penalty |
|
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|
1849 get_thread (scrReg); |
|
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|
1850 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2] |
|
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|
1851 movptr(tmpReg, NULL_WORD); // consider: xor vs mov |
|
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|
1852 if (os::is_MP()) { |
|
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|
1853 lock(); |
|
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|
1854 } |
|
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|
1855 cmpxchgptr(scrReg, Address(boxReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
1856 } else |
|
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1857 if ((EmitSync & 128) == 0) { // avoid ST-before-CAS |
|
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1858 movptr(scrReg, boxReg); |
|
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1859 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2] |
|
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|
1860 |
|
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|
1861 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes |
|
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1862 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { |
|
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|
1863 // prefetchw [eax + Offset(_owner)-2] |
|
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1864 prefetchw(Address(tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
1865 } |
|
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|
1866 |
|
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1867 if ((EmitSync & 64) == 0) { |
|
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1868 // Optimistic form: consider XORL tmpReg,tmpReg |
|
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1869 movptr(tmpReg, NULL_WORD); |
|
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1870 } else { |
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1871 // Can suffer RTS->RTO upgrades on shared or cold $ lines |
|
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1872 // Test-And-CAS instead of CAS |
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1873 movptr(tmpReg, Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); // rax, = m->_owner |
|
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1874 testptr(tmpReg, tmpReg); // Locked ? |
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1875 jccb (Assembler::notZero, DONE_LABEL); |
|
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1876 } |
|
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|
1877 |
|
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|
1878 // Appears unlocked - try to swing _owner from null to non-null. |
|
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1879 // Ideally, I'd manifest "Self" with get_thread and then attempt |
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1880 // to CAS the register containing Self into m->Owner. |
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1881 // But we don't have enough registers, so instead we can either try to CAS |
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1882 // rsp or the address of the box (in scr) into &m->owner. If the CAS succeeds |
|
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1883 // we later store "Self" into m->Owner. Transiently storing a stack address |
|
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1884 // (rsp or the address of the box) into m->owner is harmless. |
|
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1885 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. |
|
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1886 if (os::is_MP()) { |
|
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|
1887 lock(); |
|
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|
1888 } |
|
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1889 cmpxchgptr(scrReg, Address(boxReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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1890 movptr(Address(scrReg, 0), 3); // box->_displaced_header = 3 |
|
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1891 jccb (Assembler::notZero, DONE_LABEL); |
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1892 get_thread (scrReg); // beware: clobbers ICCs |
|
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1893 movptr(Address(boxReg, ObjectMonitor::owner_offset_in_bytes()-2), scrReg); |
|
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1894 xorptr(boxReg, boxReg); // set icc.ZFlag = 1 to indicate success |
|
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|
1895 |
|
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1896 // If the CAS fails we can either retry or pass control to the slow-path. |
|
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1897 // We use the latter tactic. |
|
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1898 // Pass the CAS result in the icc.ZFlag into DONE_LABEL |
|
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1899 // If the CAS was successful ... |
|
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1900 // Self has acquired the lock |
|
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1901 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it. |
|
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1902 // Intentional fall-through into DONE_LABEL ... |
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1903 } else { |
|
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1904 movptr(Address(boxReg, 0), intptr_t(markOopDesc::unused_mark())); // results in ST-before-CAS penalty |
|
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1905 movptr(boxReg, tmpReg); |
|
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1906 |
|
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1907 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes |
|
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1908 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { |
|
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1909 // prefetchw [eax + Offset(_owner)-2] |
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1910 prefetchw(Address(tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
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1911 } |
|
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1912 |
|
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1913 if ((EmitSync & 64) == 0) { |
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1914 // Optimistic form |
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1915 xorptr (tmpReg, tmpReg); |
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1916 } else { |
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1917 // Can suffer RTS->RTO upgrades on shared or cold $ lines |
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1918 movptr(tmpReg, Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); // rax, = m->_owner |
|
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1919 testptr(tmpReg, tmpReg); // Locked ? |
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1920 jccb (Assembler::notZero, DONE_LABEL); |
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1921 } |
|
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1922 |
|
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1923 // Appears unlocked - try to swing _owner from null to non-null. |
|
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1924 // Use either "Self" (in scr) or rsp as thread identity in _owner. |
|
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1925 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. |
|
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1926 get_thread (scrReg); |
|
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1927 if (os::is_MP()) { |
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|
1928 lock(); |
|
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1929 } |
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1930 cmpxchgptr(scrReg, Address(boxReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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1931 |
|
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1932 // If the CAS fails we can either retry or pass control to the slow-path. |
|
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1933 // We use the latter tactic. |
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1934 // Pass the CAS result in the icc.ZFlag into DONE_LABEL |
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1935 // If the CAS was successful ... |
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1936 // Self has acquired the lock |
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1937 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it. |
|
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1938 // Intentional fall-through into DONE_LABEL ... |
|
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1939 } |
|
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|
1940 #else // _LP64 |
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1941 // It's inflated |
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|
1942 |
|
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|
1943 // TODO: someday avoid the ST-before-CAS penalty by |
|
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1944 // relocating (deferring) the following ST. |
|
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1945 // We should also think about trying a CAS without having |
|
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1946 // fetched _owner. If the CAS is successful we may |
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1947 // avoid an RTO->RTS upgrade on the $line. |
|
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1948 |
|
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1949 // Without cast to int32_t a movptr will destroy r10 which is typically obj |
|
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1950 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); |
|
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1951 |
| 17780 | 1952 movptr (boxReg, tmpReg); |
|
17714
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1953 movptr (tmpReg, Address(boxReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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1954 testptr(tmpReg, tmpReg); |
|
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1955 jccb (Assembler::notZero, DONE_LABEL); |
|
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|
1956 |
|
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|
1957 // It's inflated and appears unlocked |
|
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1958 if (os::is_MP()) { |
|
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|
1959 lock(); |
|
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|
1960 } |
|
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|
1961 cmpxchgptr(r15_thread, Address(boxReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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1962 // Intentional fall-through into DONE_LABEL ... |
| 17780 | 1963 #endif // _LP64 |
| 1964 | |
| 1965 #if INCLUDE_RTM_OPT | |
| 1966 } // use_rtm() | |
|
17714
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|
1967 #endif |
|
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1968 // DONE_LABEL is a hot target - we'd really like to place it at the |
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1969 // start of cache line by padding with NOPs. |
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1970 // See the AMD and Intel software optimization manuals for the |
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1971 // most efficient "long" NOP encodings. |
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1972 // Unfortunately none of our alignment mechanisms suffice. |
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1973 bind(DONE_LABEL); |
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1974 |
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1975 // At DONE_LABEL the icc ZFlag is set as follows ... |
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1976 // Fast_Unlock uses the same protocol. |
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1977 // ZFlag == 1 -> Success |
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1978 // ZFlag == 0 -> Failure - force control through the slow-path |
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1979 } |
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1980 } |
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1981 |
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1982 // obj: object to unlock |
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1983 // box: box address (displaced header location), killed. Must be EAX. |
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1984 // tmp: killed, cannot be obj nor box. |
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1985 // |
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1986 // Some commentary on balanced locking: |
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1987 // |
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1988 // Fast_Lock and Fast_Unlock are emitted only for provably balanced lock sites. |
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1989 // Methods that don't have provably balanced locking are forced to run in the |
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1990 // interpreter - such methods won't be compiled to use fast_lock and fast_unlock. |
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1991 // The interpreter provides two properties: |
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1992 // I1: At return-time the interpreter automatically and quietly unlocks any |
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1993 // objects acquired the current activation (frame). Recall that the |
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1994 // interpreter maintains an on-stack list of locks currently held by |
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1995 // a frame. |
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1996 // I2: If a method attempts to unlock an object that is not held by the |
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1997 // the frame the interpreter throws IMSX. |
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1998 // |
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1999 // Lets say A(), which has provably balanced locking, acquires O and then calls B(). |
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2000 // B() doesn't have provably balanced locking so it runs in the interpreter. |
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2001 // Control returns to A() and A() unlocks O. By I1 and I2, above, we know that O |
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2002 // is still locked by A(). |
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2003 // |
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2004 // The only other source of unbalanced locking would be JNI. The "Java Native Interface: |
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2005 // Programmer's Guide and Specification" claims that an object locked by jni_monitorenter |
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2006 // should not be unlocked by "normal" java-level locking and vice-versa. The specification |
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2007 // doesn't specify what will occur if a program engages in such mixed-mode locking, however. |
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2008 |
| 17780 | 2009 void MacroAssembler::fast_unlock(Register objReg, Register boxReg, Register tmpReg, bool use_rtm) { |
| 2010 assert(boxReg == rax, ""); | |
| 2011 assert_different_registers(objReg, boxReg, tmpReg); | |
|
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2012 |
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2013 if (EmitSync & 4) { |
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2014 // Disable - inhibit all inlining. Force control through the slow-path |
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2015 cmpptr (rsp, 0); |
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2016 } else |
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2017 if (EmitSync & 8) { |
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2018 Label DONE_LABEL; |
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2019 if (UseBiasedLocking) { |
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2020 biased_locking_exit(objReg, tmpReg, DONE_LABEL); |
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2021 } |
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2022 // Classic stack-locking code ... |
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2023 // Check whether the displaced header is 0 |
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2024 //(=> recursive unlock) |
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2025 movptr(tmpReg, Address(boxReg, 0)); |
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2026 testptr(tmpReg, tmpReg); |
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2027 jccb(Assembler::zero, DONE_LABEL); |
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2028 // If not recursive lock, reset the header to displaced header |
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2029 if (os::is_MP()) { |
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2030 lock(); |
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2031 } |
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2032 cmpxchgptr(tmpReg, Address(objReg, 0)); // Uses RAX which is box |
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2033 bind(DONE_LABEL); |
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2034 } else { |
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2035 Label DONE_LABEL, Stacked, CheckSucc; |
|
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|
2036 |
|
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|
2037 // Critically, the biased locking test must have precedence over |
|
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2038 // and appear before the (box->dhw == 0) recursive stack-lock test. |
|
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|
2039 if (UseBiasedLocking && !UseOptoBiasInlining) { |
|
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|
2040 biased_locking_exit(objReg, tmpReg, DONE_LABEL); |
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|
2041 } |
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|
2042 |
| 17780 | 2043 #if INCLUDE_RTM_OPT |
| 2044 if (UseRTMForStackLocks && use_rtm) { | |
| 2045 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking"); | |
| 2046 Label L_regular_unlock; | |
| 2047 movptr(tmpReg, Address(objReg, 0)); // fetch markword | |
| 2048 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits | |
| 2049 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked | |
| 2050 jccb(Assembler::notEqual, L_regular_unlock); // if !HLE RegularLock | |
| 2051 xend(); // otherwise end... | |
| 2052 jmp(DONE_LABEL); // ... and we're done | |
| 2053 bind(L_regular_unlock); | |
| 2054 } | |
| 2055 #endif | |
| 2056 | |
|
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|
2057 cmpptr(Address(boxReg, 0), (int32_t)NULL_WORD); // Examine the displaced header |
| 17780 | 2058 jcc (Assembler::zero, DONE_LABEL); // 0 indicates recursive stack-lock |
|
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|
2059 movptr(tmpReg, Address(objReg, 0)); // Examine the object's markword |
| 17780 | 2060 testptr(tmpReg, markOopDesc::monitor_value); // Inflated? |
|
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|
2061 jccb (Assembler::zero, Stacked); |
|
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|
2062 |
|
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|
2063 // It's inflated. |
| 17780 | 2064 #if INCLUDE_RTM_OPT |
| 2065 if (use_rtm) { | |
| 2066 Label L_regular_inflated_unlock; | |
| 2067 // Clean monitor_value bit to get valid pointer | |
| 2068 int owner_offset = ObjectMonitor::owner_offset_in_bytes() - markOopDesc::monitor_value; | |
| 2069 movptr(boxReg, Address(tmpReg, owner_offset)); | |
| 2070 testptr(boxReg, boxReg); | |
| 2071 jccb(Assembler::notZero, L_regular_inflated_unlock); | |
| 2072 xend(); | |
| 2073 jmpb(DONE_LABEL); | |
| 2074 bind(L_regular_inflated_unlock); | |
| 2075 } | |
| 2076 #endif | |
| 2077 | |
|
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|
2078 // Despite our balanced locking property we still check that m->_owner == Self |
|
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|
2079 // as java routines or native JNI code called by this thread might |
|
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|
2080 // have released the lock. |
|
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|
2081 // Refer to the comments in synchronizer.cpp for how we might encode extra |
|
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|
2082 // state in _succ so we can avoid fetching EntryList|cxq. |
|
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|
2083 // |
|
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|
2084 // I'd like to add more cases in fast_lock() and fast_unlock() -- |
|
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|
2085 // such as recursive enter and exit -- but we have to be wary of |
|
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|
2086 // I$ bloat, T$ effects and BP$ effects. |
|
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|
2087 // |
|
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|
2088 // If there's no contention try a 1-0 exit. That is, exit without |
|
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|
2089 // a costly MEMBAR or CAS. See synchronizer.cpp for details on how |
|
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|
2090 // we detect and recover from the race that the 1-0 exit admits. |
|
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|
2091 // |
|
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|
2092 // Conceptually Fast_Unlock() must execute a STST|LDST "release" barrier |
|
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|
2093 // before it STs null into _owner, releasing the lock. Updates |
|
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|
2094 // to data protected by the critical section must be visible before |
|
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|
2095 // we drop the lock (and thus before any other thread could acquire |
|
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|
2096 // the lock and observe the fields protected by the lock). |
|
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|
2097 // IA32's memory-model is SPO, so STs are ordered with respect to |
|
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|
2098 // each other and there's no need for an explicit barrier (fence). |
|
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|
2099 // See also http://gee.cs.oswego.edu/dl/jmm/cookbook.html. |
|
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|
2100 #ifndef _LP64 |
|
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|
2101 get_thread (boxReg); |
|
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|
2102 if ((EmitSync & 4096) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { |
|
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|
2103 // prefetchw [ebx + Offset(_owner)-2] |
|
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|
2104 prefetchw(Address(tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
2105 } |
|
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|
2106 |
|
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|
2107 // Note that we could employ various encoding schemes to reduce |
|
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|
2108 // the number of loads below (currently 4) to just 2 or 3. |
|
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|
2109 // Refer to the comments in synchronizer.cpp. |
|
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|
2110 // In practice the chain of fetches doesn't seem to impact performance, however. |
|
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|
2111 if ((EmitSync & 65536) == 0 && (EmitSync & 256)) { |
|
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|
2112 // Attempt to reduce branch density - AMD's branch predictor. |
|
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|
2113 xorptr(boxReg, Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
2114 orptr(boxReg, Address (tmpReg, ObjectMonitor::recursions_offset_in_bytes()-2)); |
|
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|
2115 orptr(boxReg, Address (tmpReg, ObjectMonitor::EntryList_offset_in_bytes()-2)); |
|
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|
2116 orptr(boxReg, Address (tmpReg, ObjectMonitor::cxq_offset_in_bytes()-2)); |
|
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|
2117 jccb (Assembler::notZero, DONE_LABEL); |
|
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|
2118 movptr(Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2), NULL_WORD); |
|
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|
2119 jmpb (DONE_LABEL); |
|
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|
2120 } else { |
|
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|
2121 xorptr(boxReg, Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
2122 orptr(boxReg, Address (tmpReg, ObjectMonitor::recursions_offset_in_bytes()-2)); |
|
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|
2123 jccb (Assembler::notZero, DONE_LABEL); |
|
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|
2124 movptr(boxReg, Address (tmpReg, ObjectMonitor::EntryList_offset_in_bytes()-2)); |
|
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|
2125 orptr(boxReg, Address (tmpReg, ObjectMonitor::cxq_offset_in_bytes()-2)); |
|
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|
2126 jccb (Assembler::notZero, CheckSucc); |
|
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|
2127 movptr(Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2), NULL_WORD); |
|
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|
2128 jmpb (DONE_LABEL); |
|
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|
2129 } |
|
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|
2130 |
|
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|
2131 // The Following code fragment (EmitSync & 65536) improves the performance of |
|
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|
2132 // contended applications and contended synchronization microbenchmarks. |
|
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|
2133 // Unfortunately the emission of the code - even though not executed - causes regressions |
|
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|
2134 // in scimark and jetstream, evidently because of $ effects. Replacing the code |
|
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|
2135 // with an equal number of never-executed NOPs results in the same regression. |
|
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|
2136 // We leave it off by default. |
|
4d4ea046d32a
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changeset
|
2137 |
|
4d4ea046d32a
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|
2138 if ((EmitSync & 65536) != 0) { |
|
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|
2139 Label LSuccess, LGoSlowPath ; |
|
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|
2140 |
|
4d4ea046d32a
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|
2141 bind (CheckSucc); |
|
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|
2142 |
|
4d4ea046d32a
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|
2143 // Optional pre-test ... it's safe to elide this |
|
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|
2144 if ((EmitSync & 16) == 0) { |
|
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|
2145 cmpptr(Address (tmpReg, ObjectMonitor::succ_offset_in_bytes()-2), (int32_t)NULL_WORD); |
|
4d4ea046d32a
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|
2146 jccb (Assembler::zero, LGoSlowPath); |
|
4d4ea046d32a
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|
2147 } |
|
4d4ea046d32a
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|
2148 |
|
4d4ea046d32a
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changeset
|
2149 // We have a classic Dekker-style idiom: |
|
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|
2150 // ST m->_owner = 0 ; MEMBAR; LD m->_succ |
|
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|
2151 // There are a number of ways to implement the barrier: |
|
4d4ea046d32a
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|
2152 // (1) lock:andl &m->_owner, 0 |
|
4d4ea046d32a
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|
2153 // is fast, but mask doesn't currently support the "ANDL M,IMM32" form. |
|
4d4ea046d32a
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|
2154 // LOCK: ANDL [ebx+Offset(_Owner)-2], 0 |
|
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|
2155 // Encodes as 81 31 OFF32 IMM32 or 83 63 OFF8 IMM8 |
|
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|
2156 // (2) If supported, an explicit MFENCE is appealing. |
|
4d4ea046d32a
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|
2157 // In older IA32 processors MFENCE is slower than lock:add or xchg |
|
4d4ea046d32a
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|
2158 // particularly if the write-buffer is full as might be the case if |
|
4d4ea046d32a
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|
2159 // if stores closely precede the fence or fence-equivalent instruction. |
|
4d4ea046d32a
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|
2160 // In more modern implementations MFENCE appears faster, however. |
|
4d4ea046d32a
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|
2161 // (3) In lieu of an explicit fence, use lock:addl to the top-of-stack |
|
4d4ea046d32a
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|
2162 // The $lines underlying the top-of-stack should be in M-state. |
|
4d4ea046d32a
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|
2163 // The locked add instruction is serializing, of course. |
|
4d4ea046d32a
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diff
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|
2164 // (4) Use xchg, which is serializing |
|
4d4ea046d32a
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diff
changeset
|
2165 // mov boxReg, 0; xchgl boxReg, [tmpReg + Offset(_owner)-2] also works |
|
4d4ea046d32a
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|
2166 // (5) ST m->_owner = 0 and then execute lock:orl &m->_succ, 0. |
|
4d4ea046d32a
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|
2167 // The integer condition codes will tell us if succ was 0. |
|
4d4ea046d32a
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changeset
|
2168 // Since _succ and _owner should reside in the same $line and |
|
4d4ea046d32a
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diff
changeset
|
2169 // we just stored into _owner, it's likely that the $line |
|
4d4ea046d32a
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changeset
|
2170 // remains in M-state for the lock:orl. |
|
4d4ea046d32a
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|
2171 // |
|
4d4ea046d32a
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|
2172 // We currently use (3), although it's likely that switching to (2) |
|
4d4ea046d32a
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|
2173 // is correct for the future. |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
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13424
diff
changeset
|
2174 |
|
4d4ea046d32a
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diff
changeset
|
2175 movptr(Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2), NULL_WORD); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
2176 if (os::is_MP()) { |
|
4d4ea046d32a
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kvn
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changeset
|
2177 if (VM_Version::supports_sse2() && 1 == FenceInstruction) { |
|
4d4ea046d32a
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diff
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|
2178 mfence(); |
|
4d4ea046d32a
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changeset
|
2179 } else { |
|
4d4ea046d32a
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diff
changeset
|
2180 lock (); addptr(Address(rsp, 0), 0); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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changeset
|
2181 } |
|
4d4ea046d32a
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changeset
|
2182 } |
|
4d4ea046d32a
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diff
changeset
|
2183 // Ratify _succ remains non-null |
|
4d4ea046d32a
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changeset
|
2184 cmpptr(Address (tmpReg, ObjectMonitor::succ_offset_in_bytes()-2), 0); |
|
4d4ea046d32a
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changeset
|
2185 jccb (Assembler::notZero, LSuccess); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
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13424
diff
changeset
|
2186 |
|
4d4ea046d32a
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diff
changeset
|
2187 xorptr(boxReg, boxReg); // box is really EAX |
|
4d4ea046d32a
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changeset
|
2188 if (os::is_MP()) { lock(); } |
|
4d4ea046d32a
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changeset
|
2189 cmpxchgptr(rsp, Address(tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
4d4ea046d32a
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diff
changeset
|
2190 jccb (Assembler::notEqual, LSuccess); |
|
4d4ea046d32a
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kvn
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diff
changeset
|
2191 // Since we're low on registers we installed rsp as a placeholding in _owner. |
|
4d4ea046d32a
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diff
changeset
|
2192 // Now install Self over rsp. This is safe as we're transitioning from |
|
4d4ea046d32a
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changeset
|
2193 // non-null to non=null |
|
4d4ea046d32a
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diff
changeset
|
2194 get_thread (boxReg); |
|
4d4ea046d32a
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kvn
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diff
changeset
|
2195 movptr(Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2), boxReg); |
|
4d4ea046d32a
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diff
changeset
|
2196 // Intentional fall-through into LGoSlowPath ... |
|
4d4ea046d32a
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kvn
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diff
changeset
|
2197 |
|
4d4ea046d32a
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diff
changeset
|
2198 bind (LGoSlowPath); |
|
4d4ea046d32a
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diff
changeset
|
2199 orptr(boxReg, 1); // set ICC.ZF=0 to indicate failure |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
2200 jmpb (DONE_LABEL); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
kvn
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13424
diff
changeset
|
2201 |
|
4d4ea046d32a
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diff
changeset
|
2202 bind (LSuccess); |
|
4d4ea046d32a
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diff
changeset
|
2203 xorptr(boxReg, boxReg); // set ICC.ZF=1 to indicate success |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
2204 jmpb (DONE_LABEL); |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
2205 } |
|
4d4ea046d32a
8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler
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diff
changeset
|
2206 |
|
4d4ea046d32a
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kvn
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diff
changeset
|
2207 bind (Stacked); |
|
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2208 // It's not inflated and it's not recursively stack-locked and it's not biased. |
|
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|
2209 // It must be stack-locked. |
|
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|
2210 // Try to reset the header to displaced header. |
|
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|
2211 // The "box" value on the stack is stable, so we can reload |
|
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|
2212 // and be assured we observe the same value as above. |
|
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2213 movptr(tmpReg, Address(boxReg, 0)); |
|
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|
2214 if (os::is_MP()) { |
|
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|
2215 lock(); |
|
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|
2216 } |
|
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|
2217 cmpxchgptr(tmpReg, Address(objReg, 0)); // Uses RAX which is box |
|
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|
2218 // Intention fall-thru into DONE_LABEL |
|
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|
2219 |
|
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|
2220 // DONE_LABEL is a hot target - we'd really like to place it at the |
|
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|
2221 // start of cache line by padding with NOPs. |
|
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|
2222 // See the AMD and Intel software optimization manuals for the |
|
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|
2223 // most efficient "long" NOP encodings. |
|
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|
2224 // Unfortunately none of our alignment mechanisms suffice. |
|
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|
2225 if ((EmitSync & 65536) == 0) { |
|
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|
2226 bind (CheckSucc); |
|
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|
2227 } |
|
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|
2228 #else // _LP64 |
|
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|
2229 // It's inflated |
|
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|
2230 movptr(boxReg, Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
2231 xorptr(boxReg, r15_thread); |
|
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|
2232 orptr (boxReg, Address (tmpReg, ObjectMonitor::recursions_offset_in_bytes()-2)); |
|
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|
2233 jccb (Assembler::notZero, DONE_LABEL); |
|
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|
2234 movptr(boxReg, Address (tmpReg, ObjectMonitor::cxq_offset_in_bytes()-2)); |
|
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|
2235 orptr (boxReg, Address (tmpReg, ObjectMonitor::EntryList_offset_in_bytes()-2)); |
|
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|
2236 jccb (Assembler::notZero, CheckSucc); |
|
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|
2237 movptr(Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2), (int32_t)NULL_WORD); |
|
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|
2238 jmpb (DONE_LABEL); |
|
4d4ea046d32a
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|
2239 |
|
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|
2240 if ((EmitSync & 65536) == 0) { |
|
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|
2241 Label LSuccess, LGoSlowPath ; |
|
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|
2242 bind (CheckSucc); |
|
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|
2243 cmpptr(Address (tmpReg, ObjectMonitor::succ_offset_in_bytes()-2), (int32_t)NULL_WORD); |
|
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|
2244 jccb (Assembler::zero, LGoSlowPath); |
|
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|
2245 |
|
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|
2246 // I'd much rather use lock:andl m->_owner, 0 as it's faster than the |
|
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|
2247 // the explicit ST;MEMBAR combination, but masm doesn't currently support |
|
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|
2248 // "ANDQ M,IMM". Don't use MFENCE here. lock:add to TOS, xchg, etc |
|
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|
2249 // are all faster when the write buffer is populated. |
|
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|
2250 movptr (Address (tmpReg, ObjectMonitor::owner_offset_in_bytes()-2), (int32_t)NULL_WORD); |
|
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|
2251 if (os::is_MP()) { |
|
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|
2252 lock (); addl (Address(rsp, 0), 0); |
|
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|
2253 } |
|
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|
2254 cmpptr(Address (tmpReg, ObjectMonitor::succ_offset_in_bytes()-2), (int32_t)NULL_WORD); |
|
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|
2255 jccb (Assembler::notZero, LSuccess); |
|
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|
2256 |
|
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|
2257 movptr (boxReg, (int32_t)NULL_WORD); // box is really EAX |
|
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|
2258 if (os::is_MP()) { lock(); } |
|
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|
2259 cmpxchgptr(r15_thread, Address(tmpReg, ObjectMonitor::owner_offset_in_bytes()-2)); |
|
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|
2260 jccb (Assembler::notEqual, LSuccess); |
|
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|
2261 // Intentional fall-through into slow-path |
|
4d4ea046d32a
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|
2262 |
|
4d4ea046d32a
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|
2263 bind (LGoSlowPath); |
|
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|
2264 orl (boxReg, 1); // set ICC.ZF=0 to indicate failure |
|
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|
2265 jmpb (DONE_LABEL); |
|
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|
2266 |
|
4d4ea046d32a
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|
2267 bind (LSuccess); |
|
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|
2268 testl (boxReg, 0); // set ICC.ZF=1 to indicate success |
|
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|
2269 jmpb (DONE_LABEL); |
|
4d4ea046d32a
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|
2270 } |
|
4d4ea046d32a
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|
2271 |
|
4d4ea046d32a
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|
2272 bind (Stacked); |
|
4d4ea046d32a
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|
2273 movptr(tmpReg, Address (boxReg, 0)); // re-fetch |
|
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|
2274 if (os::is_MP()) { lock(); } |
|
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|
2275 cmpxchgptr(tmpReg, Address(objReg, 0)); // Uses RAX which is box |
|
4d4ea046d32a
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diff
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|
2276 |
|
4d4ea046d32a
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|
2277 if (EmitSync & 65536) { |
|
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|
2278 bind (CheckSucc); |
|
4d4ea046d32a
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|
2279 } |
|
4d4ea046d32a
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|
2280 #endif |
|
4d4ea046d32a
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diff
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|
2281 bind(DONE_LABEL); |
|
4d4ea046d32a
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diff
changeset
|
2282 // Avoid branch to branch on AMD processors |
|
4d4ea046d32a
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|
2283 if (EmitSync & 32768) { |
|
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|
2284 nop(); |
|
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|
2285 } |
|
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|
2286 } |
|
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|
2287 } |
|
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|
2288 #endif // COMPILER2 |
|
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|
2289 |
| 7199 | 2290 void MacroAssembler::c2bool(Register x) { |
| 2291 // implements x == 0 ? 0 : 1 | |
| 2292 // note: must only look at least-significant byte of x | |
| 2293 // since C-style booleans are stored in one byte | |
| 2294 // only! (was bug) | |
| 2295 andl(x, 0xFF); | |
| 2296 setb(Assembler::notZero, x); | |
| 2297 } | |
| 2298 | |
| 2299 // Wouldn't need if AddressLiteral version had new name | |
| 2300 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) { | |
| 2301 Assembler::call(L, rtype); | |
| 2302 } | |
| 2303 | |
| 2304 void MacroAssembler::call(Register entry) { | |
| 2305 Assembler::call(entry); | |
| 2306 } | |
| 2307 | |
| 2308 void MacroAssembler::call(AddressLiteral entry) { | |
| 2309 if (reachable(entry)) { | |
| 2310 Assembler::call_literal(entry.target(), entry.rspec()); | |
| 2311 } else { | |
| 2312 lea(rscratch1, entry); | |
| 2313 Assembler::call(rscratch1); | |
| 2314 } | |
| 2315 } | |
| 2316 | |
| 2317 void MacroAssembler::ic_call(address entry) { | |
| 2318 RelocationHolder rh = virtual_call_Relocation::spec(pc()); | |
| 2319 movptr(rax, (intptr_t)Universe::non_oop_word()); | |
| 2320 call(AddressLiteral(entry, rh)); | |
| 2321 } | |
| 2322 | |
| 2323 // Implementation of call_VM versions | |
| 2324 | |
| 2325 void MacroAssembler::call_VM(Register oop_result, | |
| 2326 address entry_point, | |
| 2327 bool check_exceptions) { | |
| 2328 Label C, E; | |
| 2329 call(C, relocInfo::none); | |
| 2330 jmp(E); | |
| 2331 | |
| 2332 bind(C); | |
| 2333 call_VM_helper(oop_result, entry_point, 0, check_exceptions); | |
| 2334 ret(0); | |
| 2335 | |
| 2336 bind(E); | |
| 2337 } | |
| 2338 | |
| 2339 void MacroAssembler::call_VM(Register oop_result, | |
| 2340 address entry_point, | |
| 2341 Register arg_1, | |
| 2342 bool check_exceptions) { | |
| 2343 Label C, E; | |
| 2344 call(C, relocInfo::none); | |
| 2345 jmp(E); | |
| 2346 | |
| 2347 bind(C); | |
| 2348 pass_arg1(this, arg_1); | |
| 2349 call_VM_helper(oop_result, entry_point, 1, check_exceptions); | |
| 2350 ret(0); | |
| 2351 | |
| 2352 bind(E); | |
| 2353 } | |
| 2354 | |
| 2355 void MacroAssembler::call_VM(Register oop_result, | |
| 2356 address entry_point, | |
| 2357 Register arg_1, | |
| 2358 Register arg_2, | |
| 2359 bool check_exceptions) { | |
| 2360 Label C, E; | |
| 2361 call(C, relocInfo::none); | |
| 2362 jmp(E); | |
| 2363 | |
| 2364 bind(C); | |
| 2365 | |
| 2366 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2367 | |
| 2368 pass_arg2(this, arg_2); | |
| 2369 pass_arg1(this, arg_1); | |
| 2370 call_VM_helper(oop_result, entry_point, 2, check_exceptions); | |
| 2371 ret(0); | |
| 2372 | |
| 2373 bind(E); | |
| 2374 } | |
| 2375 | |
| 2376 void MacroAssembler::call_VM(Register oop_result, | |
| 2377 address entry_point, | |
| 2378 Register arg_1, | |
| 2379 Register arg_2, | |
| 2380 Register arg_3, | |
| 2381 bool check_exceptions) { | |
| 2382 Label C, E; | |
| 2383 call(C, relocInfo::none); | |
| 2384 jmp(E); | |
| 2385 | |
| 2386 bind(C); | |
| 2387 | |
| 2388 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 2389 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 2390 pass_arg3(this, arg_3); | |
| 2391 | |
| 2392 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2393 pass_arg2(this, arg_2); | |
| 2394 | |
| 2395 pass_arg1(this, arg_1); | |
| 2396 call_VM_helper(oop_result, entry_point, 3, check_exceptions); | |
| 2397 ret(0); | |
| 2398 | |
| 2399 bind(E); | |
| 2400 } | |
| 2401 | |
| 2402 void MacroAssembler::call_VM(Register oop_result, | |
| 2403 Register last_java_sp, | |
| 2404 address entry_point, | |
| 2405 int number_of_arguments, | |
| 2406 bool check_exceptions) { | |
| 2407 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); | |
| 2408 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
| 2409 } | |
| 2410 | |
| 2411 void MacroAssembler::call_VM(Register oop_result, | |
| 2412 Register last_java_sp, | |
| 2413 address entry_point, | |
| 2414 Register arg_1, | |
| 2415 bool check_exceptions) { | |
| 2416 pass_arg1(this, arg_1); | |
| 2417 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
| 2418 } | |
| 2419 | |
| 2420 void MacroAssembler::call_VM(Register oop_result, | |
| 2421 Register last_java_sp, | |
| 2422 address entry_point, | |
| 2423 Register arg_1, | |
| 2424 Register arg_2, | |
| 2425 bool check_exceptions) { | |
| 2426 | |
| 2427 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2428 pass_arg2(this, arg_2); | |
| 2429 pass_arg1(this, arg_1); | |
| 2430 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
| 2431 } | |
| 2432 | |
| 2433 void MacroAssembler::call_VM(Register oop_result, | |
| 2434 Register last_java_sp, | |
| 2435 address entry_point, | |
| 2436 Register arg_1, | |
| 2437 Register arg_2, | |
| 2438 Register arg_3, | |
| 2439 bool check_exceptions) { | |
| 2440 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 2441 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 2442 pass_arg3(this, arg_3); | |
| 2443 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2444 pass_arg2(this, arg_2); | |
| 2445 pass_arg1(this, arg_1); | |
| 2446 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
| 2447 } | |
| 2448 | |
| 2449 void MacroAssembler::super_call_VM(Register oop_result, | |
| 2450 Register last_java_sp, | |
| 2451 address entry_point, | |
| 2452 int number_of_arguments, | |
| 2453 bool check_exceptions) { | |
| 2454 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); | |
| 2455 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
| 2456 } | |
| 2457 | |
| 2458 void MacroAssembler::super_call_VM(Register oop_result, | |
| 2459 Register last_java_sp, | |
| 2460 address entry_point, | |
| 2461 Register arg_1, | |
| 2462 bool check_exceptions) { | |
| 2463 pass_arg1(this, arg_1); | |
| 2464 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
| 2465 } | |
| 2466 | |
| 2467 void MacroAssembler::super_call_VM(Register oop_result, | |
| 2468 Register last_java_sp, | |
| 2469 address entry_point, | |
| 2470 Register arg_1, | |
| 2471 Register arg_2, | |
| 2472 bool check_exceptions) { | |
| 2473 | |
| 2474 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2475 pass_arg2(this, arg_2); | |
| 2476 pass_arg1(this, arg_1); | |
| 2477 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
| 2478 } | |
| 2479 | |
| 2480 void MacroAssembler::super_call_VM(Register oop_result, | |
| 2481 Register last_java_sp, | |
| 2482 address entry_point, | |
| 2483 Register arg_1, | |
| 2484 Register arg_2, | |
| 2485 Register arg_3, | |
| 2486 bool check_exceptions) { | |
| 2487 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 2488 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 2489 pass_arg3(this, arg_3); | |
| 2490 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2491 pass_arg2(this, arg_2); | |
| 2492 pass_arg1(this, arg_1); | |
| 2493 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
| 2494 } | |
| 2495 | |
| 2496 void MacroAssembler::call_VM_base(Register oop_result, | |
| 2497 Register java_thread, | |
| 2498 Register last_java_sp, | |
| 2499 address entry_point, | |
| 2500 int number_of_arguments, | |
| 2501 bool check_exceptions) { | |
| 2502 // determine java_thread register | |
| 2503 if (!java_thread->is_valid()) { | |
| 2504 #ifdef _LP64 | |
| 2505 java_thread = r15_thread; | |
| 2506 #else | |
| 2507 java_thread = rdi; | |
| 2508 get_thread(java_thread); | |
| 2509 #endif // LP64 | |
| 2510 } | |
| 2511 // determine last_java_sp register | |
| 2512 if (!last_java_sp->is_valid()) { | |
| 2513 last_java_sp = rsp; | |
| 2514 } | |
| 2515 // debugging support | |
| 2516 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); | |
| 2517 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register")); | |
| 2518 #ifdef ASSERT | |
| 2519 // TraceBytecodes does not use r12 but saves it over the call, so don't verify | |
| 2520 // r12 is the heapbase. | |
|
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2521 LP64_ONLY(if ((UseCompressedOops || UseCompressedClassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");) |
| 7199 | 2522 #endif // ASSERT |
| 2523 | |
| 2524 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result"); | |
| 2525 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp"); | |
| 2526 | |
| 2527 // push java thread (becomes first argument of C function) | |
| 2528 | |
| 2529 NOT_LP64(push(java_thread); number_of_arguments++); | |
| 2530 LP64_ONLY(mov(c_rarg0, r15_thread)); | |
| 2531 | |
| 2532 // set last Java frame before call | |
| 2533 assert(last_java_sp != rbp, "can't use ebp/rbp"); | |
| 2534 | |
| 2535 // Only interpreter should have to set fp | |
| 2536 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL); | |
| 2537 | |
| 2538 // do the call, remove parameters | |
| 2539 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
| 2540 | |
| 2541 // restore the thread (cannot use the pushed argument since arguments | |
| 2542 // may be overwritten by C code generated by an optimizing compiler); | |
| 2543 // however can use the register value directly if it is callee saved. | |
| 2544 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) { | |
| 2545 // rdi & rsi (also r15) are callee saved -> nothing to do | |
| 2546 #ifdef ASSERT | |
| 2547 guarantee(java_thread != rax, "change this code"); | |
| 2548 push(rax); | |
| 2549 { Label L; | |
| 2550 get_thread(rax); | |
| 2551 cmpptr(java_thread, rax); | |
| 2552 jcc(Assembler::equal, L); | |
| 2553 STOP("MacroAssembler::call_VM_base: rdi not callee saved?"); | |
| 2554 bind(L); | |
| 2555 } | |
| 2556 pop(rax); | |
| 2557 #endif | |
| 2558 } else { | |
| 2559 get_thread(java_thread); | |
| 2560 } | |
| 2561 // reset last Java frame | |
| 2562 // Only interpreter should have to clear fp | |
| 2563 reset_last_Java_frame(java_thread, true, false); | |
| 2564 | |
| 2565 #ifndef CC_INTERP | |
| 2566 // C++ interp handles this in the interpreter | |
| 2567 check_and_handle_popframe(java_thread); | |
| 2568 check_and_handle_earlyret(java_thread); | |
| 2569 #endif /* CC_INTERP */ | |
| 2570 | |
| 2571 if (check_exceptions) { | |
| 2572 // check for pending exceptions (java_thread is set upon return) | |
| 2573 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); | |
| 2574 #ifndef _LP64 | |
| 2575 jump_cc(Assembler::notEqual, | |
| 2576 RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 2577 #else | |
| 2578 // This used to conditionally jump to forward_exception however it is | |
| 2579 // possible if we relocate that the branch will not reach. So we must jump | |
| 2580 // around so we can always reach | |
| 2581 | |
| 2582 Label ok; | |
| 2583 jcc(Assembler::equal, ok); | |
| 2584 jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 2585 bind(ok); | |
| 2586 #endif // LP64 | |
| 2587 } | |
| 2588 | |
| 2589 // get oop result if there is one and reset the value in the thread | |
| 2590 if (oop_result->is_valid()) { | |
| 2591 get_vm_result(oop_result, java_thread); | |
| 2592 } | |
| 2593 } | |
| 2594 | |
| 2595 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { | |
| 2596 | |
| 2597 // Calculate the value for last_Java_sp | |
| 2598 // somewhat subtle. call_VM does an intermediate call | |
| 2599 // which places a return address on the stack just under the | |
| 2600 // stack pointer as the user finsihed with it. This allows | |
| 2601 // use to retrieve last_Java_pc from last_Java_sp[-1]. | |
| 2602 // On 32bit we then have to push additional args on the stack to accomplish | |
| 2603 // the actual requested call. On 64bit call_VM only can use register args | |
| 2604 // so the only extra space is the return address that call_VM created. | |
| 2605 // This hopefully explains the calculations here. | |
| 2606 | |
| 2607 #ifdef _LP64 | |
| 2608 // We've pushed one address, correct last_Java_sp | |
| 2609 lea(rax, Address(rsp, wordSize)); | |
| 2610 #else | |
| 2611 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize)); | |
| 2612 #endif // LP64 | |
| 2613 | |
| 2614 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions); | |
| 2615 | |
| 2616 } | |
| 2617 | |
| 2618 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) { | |
| 2619 call_VM_leaf_base(entry_point, number_of_arguments); | |
| 2620 } | |
| 2621 | |
| 2622 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) { | |
| 2623 pass_arg0(this, arg_0); | |
| 2624 call_VM_leaf(entry_point, 1); | |
| 2625 } | |
| 2626 | |
| 2627 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { | |
| 2628 | |
| 2629 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 2630 pass_arg1(this, arg_1); | |
| 2631 pass_arg0(this, arg_0); | |
| 2632 call_VM_leaf(entry_point, 2); | |
| 2633 } | |
| 2634 | |
| 2635 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { | |
| 2636 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
| 2637 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2638 pass_arg2(this, arg_2); | |
| 2639 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 2640 pass_arg1(this, arg_1); | |
| 2641 pass_arg0(this, arg_0); | |
| 2642 call_VM_leaf(entry_point, 3); | |
| 2643 } | |
| 2644 | |
| 2645 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) { | |
| 2646 pass_arg0(this, arg_0); | |
| 2647 MacroAssembler::call_VM_leaf_base(entry_point, 1); | |
| 2648 } | |
| 2649 | |
| 2650 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { | |
| 2651 | |
| 2652 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 2653 pass_arg1(this, arg_1); | |
| 2654 pass_arg0(this, arg_0); | |
| 2655 MacroAssembler::call_VM_leaf_base(entry_point, 2); | |
| 2656 } | |
| 2657 | |
| 2658 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { | |
| 2659 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
| 2660 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2661 pass_arg2(this, arg_2); | |
| 2662 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 2663 pass_arg1(this, arg_1); | |
| 2664 pass_arg0(this, arg_0); | |
| 2665 MacroAssembler::call_VM_leaf_base(entry_point, 3); | |
| 2666 } | |
| 2667 | |
| 2668 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) { | |
| 2669 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg")); | |
| 2670 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 2671 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 2672 pass_arg3(this, arg_3); | |
| 2673 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
| 2674 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 2675 pass_arg2(this, arg_2); | |
| 2676 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 2677 pass_arg1(this, arg_1); | |
| 2678 pass_arg0(this, arg_0); | |
| 2679 MacroAssembler::call_VM_leaf_base(entry_point, 4); | |
| 2680 } | |
| 2681 | |
| 2682 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) { | |
| 2683 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset())); | |
| 2684 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD); | |
| 2685 verify_oop(oop_result, "broken oop in call_VM_base"); | |
| 2686 } | |
| 2687 | |
| 2688 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) { | |
| 2689 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset())); | |
| 2690 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD); | |
| 2691 } | |
| 2692 | |
| 2693 void MacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
| 2694 } | |
| 2695 | |
| 2696 void MacroAssembler::check_and_handle_popframe(Register java_thread) { | |
| 2697 } | |
| 2698 | |
| 2699 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) { | |
| 2700 if (reachable(src1)) { | |
| 2701 cmpl(as_Address(src1), imm); | |
| 2702 } else { | |
| 2703 lea(rscratch1, src1); | |
| 2704 cmpl(Address(rscratch1, 0), imm); | |
| 2705 } | |
| 2706 } | |
| 2707 | |
| 2708 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) { | |
| 2709 assert(!src2.is_lval(), "use cmpptr"); | |
| 2710 if (reachable(src2)) { | |
| 2711 cmpl(src1, as_Address(src2)); | |
| 2712 } else { | |
| 2713 lea(rscratch1, src2); | |
| 2714 cmpl(src1, Address(rscratch1, 0)); | |
| 2715 } | |
| 2716 } | |
| 2717 | |
| 2718 void MacroAssembler::cmp32(Register src1, int32_t imm) { | |
| 2719 Assembler::cmpl(src1, imm); | |
| 2720 } | |
| 2721 | |
| 2722 void MacroAssembler::cmp32(Register src1, Address src2) { | |
| 2723 Assembler::cmpl(src1, src2); | |
| 2724 } | |
| 2725 | |
| 2726 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { | |
| 2727 ucomisd(opr1, opr2); | |
| 2728 | |
| 2729 Label L; | |
| 2730 if (unordered_is_less) { | |
| 2731 movl(dst, -1); | |
| 2732 jcc(Assembler::parity, L); | |
| 2733 jcc(Assembler::below , L); | |
| 2734 movl(dst, 0); | |
| 2735 jcc(Assembler::equal , L); | |
| 2736 increment(dst); | |
| 2737 } else { // unordered is greater | |
| 2738 movl(dst, 1); | |
| 2739 jcc(Assembler::parity, L); | |
| 2740 jcc(Assembler::above , L); | |
| 2741 movl(dst, 0); | |
| 2742 jcc(Assembler::equal , L); | |
| 2743 decrementl(dst); | |
| 2744 } | |
| 2745 bind(L); | |
| 2746 } | |
| 2747 | |
| 2748 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { | |
| 2749 ucomiss(opr1, opr2); | |
| 2750 | |
| 2751 Label L; | |
| 2752 if (unordered_is_less) { | |
| 2753 movl(dst, -1); | |
| 2754 jcc(Assembler::parity, L); | |
| 2755 jcc(Assembler::below , L); | |
| 2756 movl(dst, 0); | |
| 2757 jcc(Assembler::equal , L); | |
| 2758 increment(dst); | |
| 2759 } else { // unordered is greater | |
| 2760 movl(dst, 1); | |
| 2761 jcc(Assembler::parity, L); | |
| 2762 jcc(Assembler::above , L); | |
| 2763 movl(dst, 0); | |
| 2764 jcc(Assembler::equal , L); | |
| 2765 decrementl(dst); | |
| 2766 } | |
| 2767 bind(L); | |
| 2768 } | |
| 2769 | |
| 2770 | |
| 2771 void MacroAssembler::cmp8(AddressLiteral src1, int imm) { | |
| 2772 if (reachable(src1)) { | |
| 2773 cmpb(as_Address(src1), imm); | |
| 2774 } else { | |
| 2775 lea(rscratch1, src1); | |
| 2776 cmpb(Address(rscratch1, 0), imm); | |
| 2777 } | |
| 2778 } | |
| 2779 | |
| 2780 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) { | |
| 2781 #ifdef _LP64 | |
| 2782 if (src2.is_lval()) { | |
| 2783 movptr(rscratch1, src2); | |
| 2784 Assembler::cmpq(src1, rscratch1); | |
| 2785 } else if (reachable(src2)) { | |
| 2786 cmpq(src1, as_Address(src2)); | |
| 2787 } else { | |
| 2788 lea(rscratch1, src2); | |
| 2789 Assembler::cmpq(src1, Address(rscratch1, 0)); | |
| 2790 } | |
| 2791 #else | |
| 2792 if (src2.is_lval()) { | |
| 2793 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); | |
| 2794 } else { | |
| 2795 cmpl(src1, as_Address(src2)); | |
| 2796 } | |
| 2797 #endif // _LP64 | |
| 2798 } | |
| 2799 | |
| 2800 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) { | |
| 2801 assert(src2.is_lval(), "not a mem-mem compare"); | |
| 2802 #ifdef _LP64 | |
| 2803 // moves src2's literal address | |
| 2804 movptr(rscratch1, src2); | |
| 2805 Assembler::cmpq(src1, rscratch1); | |
| 2806 #else | |
| 2807 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); | |
| 2808 #endif // _LP64 | |
| 2809 } | |
| 2810 | |
| 2811 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) { | |
| 2812 if (reachable(adr)) { | |
| 2813 if (os::is_MP()) | |
| 2814 lock(); | |
| 2815 cmpxchgptr(reg, as_Address(adr)); | |
| 2816 } else { | |
| 2817 lea(rscratch1, adr); | |
| 2818 if (os::is_MP()) | |
| 2819 lock(); | |
| 2820 cmpxchgptr(reg, Address(rscratch1, 0)); | |
| 2821 } | |
| 2822 } | |
| 2823 | |
| 2824 void MacroAssembler::cmpxchgptr(Register reg, Address adr) { | |
| 2825 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr)); | |
| 2826 } | |
| 2827 | |
| 2828 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) { | |
| 2829 if (reachable(src)) { | |
| 2830 Assembler::comisd(dst, as_Address(src)); | |
| 2831 } else { | |
| 2832 lea(rscratch1, src); | |
| 2833 Assembler::comisd(dst, Address(rscratch1, 0)); | |
| 2834 } | |
| 2835 } | |
| 2836 | |
| 2837 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) { | |
| 2838 if (reachable(src)) { | |
| 2839 Assembler::comiss(dst, as_Address(src)); | |
| 2840 } else { | |
| 2841 lea(rscratch1, src); | |
| 2842 Assembler::comiss(dst, Address(rscratch1, 0)); | |
| 2843 } | |
| 2844 } | |
| 2845 | |
| 2846 | |
| 2847 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) { | |
| 2848 Condition negated_cond = negate_condition(cond); | |
| 2849 Label L; | |
| 2850 jcc(negated_cond, L); | |
| 17780 | 2851 pushf(); // Preserve flags |
| 7199 | 2852 atomic_incl(counter_addr); |
| 17780 | 2853 popf(); |
| 7199 | 2854 bind(L); |
| 2855 } | |
| 2856 | |
| 2857 int MacroAssembler::corrected_idivl(Register reg) { | |
| 2858 // Full implementation of Java idiv and irem; checks for | |
| 2859 // special case as described in JVM spec., p.243 & p.271. | |
| 2860 // The function returns the (pc) offset of the idivl | |
| 2861 // instruction - may be needed for implicit exceptions. | |
| 2862 // | |
| 2863 // normal case special case | |
| 2864 // | |
| 2865 // input : rax,: dividend min_int | |
| 2866 // reg: divisor (may not be rax,/rdx) -1 | |
| 2867 // | |
| 2868 // output: rax,: quotient (= rax, idiv reg) min_int | |
| 2869 // rdx: remainder (= rax, irem reg) 0 | |
| 2870 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register"); | |
| 2871 const int min_int = 0x80000000; | |
| 2872 Label normal_case, special_case; | |
| 2873 | |
| 2874 // check for special case | |
| 2875 cmpl(rax, min_int); | |
| 2876 jcc(Assembler::notEqual, normal_case); | |
| 2877 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0) | |
| 2878 cmpl(reg, -1); | |
| 2879 jcc(Assembler::equal, special_case); | |
| 2880 | |
| 2881 // handle normal case | |
| 2882 bind(normal_case); | |
| 2883 cdql(); | |
| 2884 int idivl_offset = offset(); | |
| 2885 idivl(reg); | |
| 2886 | |
| 2887 // normal and special case exit | |
| 2888 bind(special_case); | |
| 2889 | |
| 2890 return idivl_offset; | |
| 2891 } | |
| 2892 | |
| 2893 | |
| 2894 | |
| 2895 void MacroAssembler::decrementl(Register reg, int value) { | |
| 2896 if (value == min_jint) {subl(reg, value) ; return; } | |
| 2897 if (value < 0) { incrementl(reg, -value); return; } | |
| 2898 if (value == 0) { ; return; } | |
| 2899 if (value == 1 && UseIncDec) { decl(reg) ; return; } | |
| 2900 /* else */ { subl(reg, value) ; return; } | |
| 2901 } | |
| 2902 | |
| 2903 void MacroAssembler::decrementl(Address dst, int value) { | |
| 2904 if (value == min_jint) {subl(dst, value) ; return; } | |
| 2905 if (value < 0) { incrementl(dst, -value); return; } | |
| 2906 if (value == 0) { ; return; } | |
| 2907 if (value == 1 && UseIncDec) { decl(dst) ; return; } | |
| 2908 /* else */ { subl(dst, value) ; return; } | |
| 2909 } | |
| 2910 | |
| 2911 void MacroAssembler::division_with_shift (Register reg, int shift_value) { | |
| 2912 assert (shift_value > 0, "illegal shift value"); | |
| 2913 Label _is_positive; | |
| 2914 testl (reg, reg); | |
| 2915 jcc (Assembler::positive, _is_positive); | |
| 2916 int offset = (1 << shift_value) - 1 ; | |
| 2917 | |
| 2918 if (offset == 1) { | |
| 2919 incrementl(reg); | |
| 2920 } else { | |
| 2921 addl(reg, offset); | |
| 2922 } | |
| 2923 | |
| 2924 bind (_is_positive); | |
| 2925 sarl(reg, shift_value); | |
| 2926 } | |
| 2927 | |
| 2928 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) { | |
| 2929 if (reachable(src)) { | |
| 2930 Assembler::divsd(dst, as_Address(src)); | |
| 2931 } else { | |
| 2932 lea(rscratch1, src); | |
| 2933 Assembler::divsd(dst, Address(rscratch1, 0)); | |
| 2934 } | |
| 2935 } | |
| 2936 | |
| 2937 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) { | |
| 2938 if (reachable(src)) { | |
| 2939 Assembler::divss(dst, as_Address(src)); | |
| 2940 } else { | |
| 2941 lea(rscratch1, src); | |
| 2942 Assembler::divss(dst, Address(rscratch1, 0)); | |
| 2943 } | |
| 2944 } | |
| 2945 | |
| 2946 // !defined(COMPILER2) is because of stupid core builds | |
| 2947 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) | |
| 2948 void MacroAssembler::empty_FPU_stack() { | |
| 2949 if (VM_Version::supports_mmx()) { | |
| 2950 emms(); | |
| 2951 } else { | |
| 2952 for (int i = 8; i-- > 0; ) ffree(i); | |
| 2953 } | |
| 2954 } | |
| 2955 #endif // !LP64 || C1 || !C2 | |
| 2956 | |
| 2957 | |
| 2958 // Defines obj, preserves var_size_in_bytes | |
| 2959 void MacroAssembler::eden_allocate(Register obj, | |
| 2960 Register var_size_in_bytes, | |
| 2961 int con_size_in_bytes, | |
| 2962 Register t1, | |
| 2963 Label& slow_case) { | |
| 2964 assert(obj == rax, "obj must be in rax, for cmpxchg"); | |
| 2965 assert_different_registers(obj, var_size_in_bytes, t1); | |
| 2966 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
| 2967 jmp(slow_case); | |
| 2968 } else { | |
| 2969 Register end = t1; | |
| 2970 Label retry; | |
| 2971 bind(retry); | |
| 2972 ExternalAddress heap_top((address) Universe::heap()->top_addr()); | |
| 2973 movptr(obj, heap_top); | |
| 2974 if (var_size_in_bytes == noreg) { | |
| 2975 lea(end, Address(obj, con_size_in_bytes)); | |
| 2976 } else { | |
| 2977 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); | |
| 2978 } | |
| 2979 // if end < obj then we wrapped around => object too long => slow case | |
| 2980 cmpptr(end, obj); | |
| 2981 jcc(Assembler::below, slow_case); | |
| 2982 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr())); | |
| 2983 jcc(Assembler::above, slow_case); | |
| 2984 // Compare obj with the top addr, and if still equal, store the new top addr in | |
| 2985 // end at the address of the top addr pointer. Sets ZF if was equal, and clears | |
| 2986 // it otherwise. Use lock prefix for atomicity on MPs. | |
| 2987 locked_cmpxchgptr(end, heap_top); | |
| 2988 jcc(Assembler::notEqual, retry); | |
| 2989 } | |
| 2990 } | |
| 2991 | |
| 2992 void MacroAssembler::enter() { | |
| 2993 push(rbp); | |
| 2994 mov(rbp, rsp); | |
| 2995 } | |
| 2996 | |
| 2997 // A 5 byte nop that is safe for patching (see patch_verified_entry) | |
| 2998 void MacroAssembler::fat_nop() { | |
| 2999 if (UseAddressNop) { | |
| 3000 addr_nop_5(); | |
| 3001 } else { | |
|
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3002 emit_int8(0x26); // es: |
|
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|
3003 emit_int8(0x2e); // cs: |
|
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|
3004 emit_int8(0x64); // fs: |
|
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3005 emit_int8(0x65); // gs: |
|
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|
3006 emit_int8((unsigned char)0x90); |
| 7199 | 3007 } |
| 3008 } | |
| 3009 | |
| 3010 void MacroAssembler::fcmp(Register tmp) { | |
| 3011 fcmp(tmp, 1, true, true); | |
| 3012 } | |
| 3013 | |
| 3014 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) { | |
| 3015 assert(!pop_right || pop_left, "usage error"); | |
| 3016 if (VM_Version::supports_cmov()) { | |
| 3017 assert(tmp == noreg, "unneeded temp"); | |
| 3018 if (pop_left) { | |
| 3019 fucomip(index); | |
| 3020 } else { | |
| 3021 fucomi(index); | |
| 3022 } | |
| 3023 if (pop_right) { | |
| 3024 fpop(); | |
| 3025 } | |
| 3026 } else { | |
| 3027 assert(tmp != noreg, "need temp"); | |
| 3028 if (pop_left) { | |
| 3029 if (pop_right) { | |
| 3030 fcompp(); | |
| 3031 } else { | |
| 3032 fcomp(index); | |
| 3033 } | |
| 3034 } else { | |
| 3035 fcom(index); | |
| 3036 } | |
| 3037 // convert FPU condition into eflags condition via rax, | |
| 3038 save_rax(tmp); | |
| 3039 fwait(); fnstsw_ax(); | |
| 3040 sahf(); | |
| 3041 restore_rax(tmp); | |
| 3042 } | |
| 3043 // condition codes set as follows: | |
| 3044 // | |
| 3045 // CF (corresponds to C0) if x < y | |
| 3046 // PF (corresponds to C2) if unordered | |
| 3047 // ZF (corresponds to C3) if x = y | |
| 3048 } | |
| 3049 | |
| 3050 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) { | |
| 3051 fcmp2int(dst, unordered_is_less, 1, true, true); | |
| 3052 } | |
| 3053 | |
| 3054 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) { | |
| 3055 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right); | |
| 3056 Label L; | |
| 3057 if (unordered_is_less) { | |
| 3058 movl(dst, -1); | |
| 3059 jcc(Assembler::parity, L); | |
| 3060 jcc(Assembler::below , L); | |
| 3061 movl(dst, 0); | |
| 3062 jcc(Assembler::equal , L); | |
| 3063 increment(dst); | |
| 3064 } else { // unordered is greater | |
| 3065 movl(dst, 1); | |
| 3066 jcc(Assembler::parity, L); | |
| 3067 jcc(Assembler::above , L); | |
| 3068 movl(dst, 0); | |
| 3069 jcc(Assembler::equal , L); | |
| 3070 decrementl(dst); | |
| 3071 } | |
| 3072 bind(L); | |
| 3073 } | |
| 3074 | |
| 3075 void MacroAssembler::fld_d(AddressLiteral src) { | |
| 3076 fld_d(as_Address(src)); | |
| 3077 } | |
| 3078 | |
| 3079 void MacroAssembler::fld_s(AddressLiteral src) { | |
| 3080 fld_s(as_Address(src)); | |
| 3081 } | |
| 3082 | |
| 3083 void MacroAssembler::fld_x(AddressLiteral src) { | |
| 3084 Assembler::fld_x(as_Address(src)); | |
| 3085 } | |
| 3086 | |
| 3087 void MacroAssembler::fldcw(AddressLiteral src) { | |
| 3088 Assembler::fldcw(as_Address(src)); | |
| 3089 } | |
| 3090 | |
| 3091 void MacroAssembler::pow_exp_core_encoding() { | |
| 3092 // kills rax, rcx, rdx | |
| 3093 subptr(rsp,sizeof(jdouble)); | |
| 3094 // computes 2^X. Stack: X ... | |
| 3095 // f2xm1 computes 2^X-1 but only operates on -1<=X<=1. Get int(X) and | |
| 3096 // keep it on the thread's stack to compute 2^int(X) later | |
| 3097 // then compute 2^(X-int(X)) as (2^(X-int(X)-1+1) | |
| 3098 // final result is obtained with: 2^X = 2^int(X) * 2^(X-int(X)) | |
| 3099 fld_s(0); // Stack: X X ... | |
| 3100 frndint(); // Stack: int(X) X ... | |
| 3101 fsuba(1); // Stack: int(X) X-int(X) ... | |
| 3102 fistp_s(Address(rsp,0)); // move int(X) as integer to thread's stack. Stack: X-int(X) ... | |
| 3103 f2xm1(); // Stack: 2^(X-int(X))-1 ... | |
| 3104 fld1(); // Stack: 1 2^(X-int(X))-1 ... | |
| 3105 faddp(1); // Stack: 2^(X-int(X)) | |
| 3106 // computes 2^(int(X)): add exponent bias (1023) to int(X), then | |
| 3107 // shift int(X)+1023 to exponent position. | |
| 3108 // Exponent is limited to 11 bits if int(X)+1023 does not fit in 11 | |
| 3109 // bits, set result to NaN. 0x000 and 0x7FF are reserved exponent | |
| 3110 // values so detect them and set result to NaN. | |
| 3111 movl(rax,Address(rsp,0)); | |
| 3112 movl(rcx, -2048); // 11 bit mask and valid NaN binary encoding | |
| 3113 addl(rax, 1023); | |
| 3114 movl(rdx,rax); | |
| 3115 shll(rax,20); | |
| 3116 // Check that 0 < int(X)+1023 < 2047. Otherwise set rax to NaN. | |
| 3117 addl(rdx,1); | |
| 3118 // Check that 1 < int(X)+1023+1 < 2048 | |
| 3119 // in 3 steps: | |
| 3120 // 1- (int(X)+1023+1)&-2048 == 0 => 0 <= int(X)+1023+1 < 2048 | |
| 3121 // 2- (int(X)+1023+1)&-2048 != 0 | |
| 3122 // 3- (int(X)+1023+1)&-2048 != 1 | |
| 3123 // Do 2- first because addl just updated the flags. | |
| 3124 cmov32(Assembler::equal,rax,rcx); | |
| 3125 cmpl(rdx,1); | |
| 3126 cmov32(Assembler::equal,rax,rcx); | |
| 3127 testl(rdx,rcx); | |
| 3128 cmov32(Assembler::notEqual,rax,rcx); | |
| 3129 movl(Address(rsp,4),rax); | |
| 3130 movl(Address(rsp,0),0); | |
| 3131 fmul_d(Address(rsp,0)); // Stack: 2^X ... | |
| 3132 addptr(rsp,sizeof(jdouble)); | |
| 3133 } | |
| 3134 | |
| 3135 void MacroAssembler::increase_precision() { | |
| 3136 subptr(rsp, BytesPerWord); | |
| 3137 fnstcw(Address(rsp, 0)); | |
| 3138 movl(rax, Address(rsp, 0)); | |
| 3139 orl(rax, 0x300); | |
| 3140 push(rax); | |
| 3141 fldcw(Address(rsp, 0)); | |
| 3142 pop(rax); | |
| 3143 } | |
| 3144 | |
| 3145 void MacroAssembler::restore_precision() { | |
| 3146 fldcw(Address(rsp, 0)); | |
| 3147 addptr(rsp, BytesPerWord); | |
| 3148 } | |
| 3149 | |
| 3150 void MacroAssembler::fast_pow() { | |
| 3151 // computes X^Y = 2^(Y * log2(X)) | |
| 3152 // if fast computation is not possible, result is NaN. Requires | |
| 3153 // fallback from user of this macro. | |
| 3154 // increase precision for intermediate steps of the computation | |
|
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|
3155 BLOCK_COMMENT("fast_pow {"); |
| 7199 | 3156 increase_precision(); |
| 3157 fyl2x(); // Stack: (Y*log2(X)) ... | |
| 3158 pow_exp_core_encoding(); // Stack: exp(X) ... | |
| 3159 restore_precision(); | |
|
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|
3160 BLOCK_COMMENT("} fast_pow"); |
| 7199 | 3161 } |
| 3162 | |
| 3163 void MacroAssembler::fast_exp() { | |
| 3164 // computes exp(X) = 2^(X * log2(e)) | |
| 3165 // if fast computation is not possible, result is NaN. Requires | |
| 3166 // fallback from user of this macro. | |
| 3167 // increase precision for intermediate steps of the computation | |
| 3168 increase_precision(); | |
| 3169 fldl2e(); // Stack: log2(e) X ... | |
| 3170 fmulp(1); // Stack: (X*log2(e)) ... | |
| 3171 pow_exp_core_encoding(); // Stack: exp(X) ... | |
| 3172 restore_precision(); | |
| 3173 } | |
| 3174 | |
| 3175 void MacroAssembler::pow_or_exp(bool is_exp, int num_fpu_regs_in_use) { | |
| 3176 // kills rax, rcx, rdx | |
| 3177 // pow and exp needs 2 extra registers on the fpu stack. | |
| 3178 Label slow_case, done; | |
| 3179 Register tmp = noreg; | |
| 3180 if (!VM_Version::supports_cmov()) { | |
| 3181 // fcmp needs a temporary so preserve rdx, | |
| 3182 tmp = rdx; | |
| 3183 } | |
| 3184 Register tmp2 = rax; | |
| 3185 Register tmp3 = rcx; | |
| 3186 | |
| 3187 if (is_exp) { | |
| 3188 // Stack: X | |
| 3189 fld_s(0); // duplicate argument for runtime call. Stack: X X | |
| 3190 fast_exp(); // Stack: exp(X) X | |
| 3191 fcmp(tmp, 0, false, false); // Stack: exp(X) X | |
| 3192 // exp(X) not equal to itself: exp(X) is NaN go to slow case. | |
| 3193 jcc(Assembler::parity, slow_case); | |
| 3194 // get rid of duplicate argument. Stack: exp(X) | |
| 3195 if (num_fpu_regs_in_use > 0) { | |
| 3196 fxch(); | |
| 3197 fpop(); | |
| 3198 } else { | |
| 3199 ffree(1); | |
| 3200 } | |
| 3201 jmp(done); | |
| 3202 } else { | |
| 3203 // Stack: X Y | |
| 3204 Label x_negative, y_odd; | |
| 3205 | |
| 3206 fldz(); // Stack: 0 X Y | |
| 3207 fcmp(tmp, 1, true, false); // Stack: X Y | |
| 3208 jcc(Assembler::above, x_negative); | |
| 3209 | |
| 3210 // X >= 0 | |
| 3211 | |
| 3212 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y | |
| 3213 fld_s(1); // Stack: X Y X Y | |
| 3214 fast_pow(); // Stack: X^Y X Y | |
| 3215 fcmp(tmp, 0, false, false); // Stack: X^Y X Y | |
| 3216 // X^Y not equal to itself: X^Y is NaN go to slow case. | |
| 3217 jcc(Assembler::parity, slow_case); | |
| 3218 // get rid of duplicate arguments. Stack: X^Y | |
| 3219 if (num_fpu_regs_in_use > 0) { | |
| 3220 fxch(); fpop(); | |
| 3221 fxch(); fpop(); | |
| 3222 } else { | |
| 3223 ffree(2); | |
| 3224 ffree(1); | |
| 3225 } | |
| 3226 jmp(done); | |
| 3227 | |
| 3228 // X <= 0 | |
| 3229 bind(x_negative); | |
| 3230 | |
| 3231 fld_s(1); // Stack: Y X Y | |
| 3232 frndint(); // Stack: int(Y) X Y | |
| 3233 fcmp(tmp, 2, false, false); // Stack: int(Y) X Y | |
| 3234 jcc(Assembler::notEqual, slow_case); | |
| 3235 | |
| 3236 subptr(rsp, 8); | |
| 3237 | |
| 3238 // For X^Y, when X < 0, Y has to be an integer and the final | |
| 3239 // result depends on whether it's odd or even. We just checked | |
| 3240 // that int(Y) == Y. We move int(Y) to gp registers as a 64 bit | |
| 3241 // integer to test its parity. If int(Y) is huge and doesn't fit | |
| 3242 // in the 64 bit integer range, the integer indefinite value will | |
| 3243 // end up in the gp registers. Huge numbers are all even, the | |
| 3244 // integer indefinite number is even so it's fine. | |
| 3245 | |
| 3246 #ifdef ASSERT | |
| 3247 // Let's check we don't end up with an integer indefinite number | |
| 3248 // when not expected. First test for huge numbers: check whether | |
| 3249 // int(Y)+1 == int(Y) which is true for very large numbers and | |
| 3250 // those are all even. A 64 bit integer is guaranteed to not | |
| 3251 // overflow for numbers where y+1 != y (when precision is set to | |
| 3252 // double precision). | |
| 3253 Label y_not_huge; | |
| 3254 | |
| 3255 fld1(); // Stack: 1 int(Y) X Y | |
| 3256 fadd(1); // Stack: 1+int(Y) int(Y) X Y | |
| 3257 | |
| 3258 #ifdef _LP64 | |
| 3259 // trip to memory to force the precision down from double extended | |
| 3260 // precision | |
| 3261 fstp_d(Address(rsp, 0)); | |
| 3262 fld_d(Address(rsp, 0)); | |
| 3263 #endif | |
| 3264 | |
| 3265 fcmp(tmp, 1, true, false); // Stack: int(Y) X Y | |
| 3266 #endif | |
| 3267 | |
| 3268 // move int(Y) as 64 bit integer to thread's stack | |
| 3269 fistp_d(Address(rsp,0)); // Stack: X Y | |
| 3270 | |
| 3271 #ifdef ASSERT | |
| 3272 jcc(Assembler::notEqual, y_not_huge); | |
| 3273 | |
| 3274 // Y is huge so we know it's even. It may not fit in a 64 bit | |
| 3275 // integer and we don't want the debug code below to see the | |
| 3276 // integer indefinite value so overwrite int(Y) on the thread's | |
| 3277 // stack with 0. | |
| 3278 movl(Address(rsp, 0), 0); | |
| 3279 movl(Address(rsp, 4), 0); | |
| 3280 | |
| 3281 bind(y_not_huge); | |
| 3282 #endif | |
| 3283 | |
| 3284 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y | |
| 3285 fld_s(1); // Stack: X Y X Y | |
| 3286 fabs(); // Stack: abs(X) Y X Y | |
| 3287 fast_pow(); // Stack: abs(X)^Y X Y | |
| 3288 fcmp(tmp, 0, false, false); // Stack: abs(X)^Y X Y | |
| 3289 // abs(X)^Y not equal to itself: abs(X)^Y is NaN go to slow case. | |
| 3290 | |
| 3291 pop(tmp2); | |
| 3292 NOT_LP64(pop(tmp3)); | |
| 3293 jcc(Assembler::parity, slow_case); | |
| 3294 | |
| 3295 #ifdef ASSERT | |
| 3296 // Check that int(Y) is not integer indefinite value (int | |
| 3297 // overflow). Shouldn't happen because for values that would | |
| 3298 // overflow, 1+int(Y)==Y which was tested earlier. | |
| 3299 #ifndef _LP64 | |
| 3300 { | |
| 3301 Label integer; | |
| 3302 testl(tmp2, tmp2); | |
| 3303 jcc(Assembler::notZero, integer); | |
| 3304 cmpl(tmp3, 0x80000000); | |
| 3305 jcc(Assembler::notZero, integer); | |
| 3306 STOP("integer indefinite value shouldn't be seen here"); | |
| 3307 bind(integer); | |
| 3308 } | |
| 3309 #else | |
| 3310 { | |
| 3311 Label integer; | |
| 3312 mov(tmp3, tmp2); // preserve tmp2 for parity check below | |
| 3313 shlq(tmp3, 1); | |
| 3314 jcc(Assembler::carryClear, integer); | |
| 3315 jcc(Assembler::notZero, integer); | |
| 3316 STOP("integer indefinite value shouldn't be seen here"); | |
| 3317 bind(integer); | |
| 3318 } | |
| 3319 #endif | |
| 3320 #endif | |
| 3321 | |
| 3322 // get rid of duplicate arguments. Stack: X^Y | |
| 3323 if (num_fpu_regs_in_use > 0) { | |
| 3324 fxch(); fpop(); | |
| 3325 fxch(); fpop(); | |
| 3326 } else { | |
| 3327 ffree(2); | |
| 3328 ffree(1); | |
| 3329 } | |
| 3330 | |
| 3331 testl(tmp2, 1); | |
| 3332 jcc(Assembler::zero, done); // X <= 0, Y even: X^Y = abs(X)^Y | |
| 3333 // X <= 0, Y even: X^Y = -abs(X)^Y | |
| 3334 | |
| 3335 fchs(); // Stack: -abs(X)^Y Y | |
| 3336 jmp(done); | |
| 3337 } | |
| 3338 | |
| 3339 // slow case: runtime call | |
| 3340 bind(slow_case); | |
| 3341 | |
| 3342 fpop(); // pop incorrect result or int(Y) | |
| 3343 | |
| 3344 fp_runtime_fallback(is_exp ? CAST_FROM_FN_PTR(address, SharedRuntime::dexp) : CAST_FROM_FN_PTR(address, SharedRuntime::dpow), | |
| 3345 is_exp ? 1 : 2, num_fpu_regs_in_use); | |
| 3346 | |
| 3347 // Come here with result in F-TOS | |
| 3348 bind(done); | |
| 3349 } | |
| 3350 | |
| 3351 void MacroAssembler::fpop() { | |
| 3352 ffree(); | |
| 3353 fincstp(); | |
| 3354 } | |
| 3355 | |
| 3356 void MacroAssembler::fremr(Register tmp) { | |
| 3357 save_rax(tmp); | |
| 3358 { Label L; | |
| 3359 bind(L); | |
| 3360 fprem(); | |
| 3361 fwait(); fnstsw_ax(); | |
| 3362 #ifdef _LP64 | |
| 3363 testl(rax, 0x400); | |
| 3364 jcc(Assembler::notEqual, L); | |
| 3365 #else | |
| 3366 sahf(); | |
| 3367 jcc(Assembler::parity, L); | |
| 3368 #endif // _LP64 | |
| 3369 } | |
| 3370 restore_rax(tmp); | |
| 3371 // Result is in ST0. | |
| 3372 // Note: fxch & fpop to get rid of ST1 | |
| 3373 // (otherwise FPU stack could overflow eventually) | |
| 3374 fxch(1); | |
| 3375 fpop(); | |
| 3376 } | |
| 3377 | |
| 3378 | |
| 3379 void MacroAssembler::incrementl(AddressLiteral dst) { | |
| 3380 if (reachable(dst)) { | |
| 3381 incrementl(as_Address(dst)); | |
| 3382 } else { | |
| 3383 lea(rscratch1, dst); | |
| 3384 incrementl(Address(rscratch1, 0)); | |
| 3385 } | |
| 3386 } | |
| 3387 | |
| 3388 void MacroAssembler::incrementl(ArrayAddress dst) { | |
| 3389 incrementl(as_Address(dst)); | |
| 3390 } | |
| 3391 | |
| 3392 void MacroAssembler::incrementl(Register reg, int value) { | |
| 3393 if (value == min_jint) {addl(reg, value) ; return; } | |
| 3394 if (value < 0) { decrementl(reg, -value); return; } | |
| 3395 if (value == 0) { ; return; } | |
| 3396 if (value == 1 && UseIncDec) { incl(reg) ; return; } | |
| 3397 /* else */ { addl(reg, value) ; return; } | |
| 3398 } | |
| 3399 | |
| 3400 void MacroAssembler::incrementl(Address dst, int value) { | |
| 3401 if (value == min_jint) {addl(dst, value) ; return; } | |
| 3402 if (value < 0) { decrementl(dst, -value); return; } | |
| 3403 if (value == 0) { ; return; } | |
| 3404 if (value == 1 && UseIncDec) { incl(dst) ; return; } | |
| 3405 /* else */ { addl(dst, value) ; return; } | |
| 3406 } | |
| 3407 | |
| 3408 void MacroAssembler::jump(AddressLiteral dst) { | |
| 3409 if (reachable(dst)) { | |
| 3410 jmp_literal(dst.target(), dst.rspec()); | |
| 3411 } else { | |
| 3412 lea(rscratch1, dst); | |
| 3413 jmp(rscratch1); | |
| 3414 } | |
| 3415 } | |
| 3416 | |
| 3417 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) { | |
| 3418 if (reachable(dst)) { | |
| 3419 InstructionMark im(this); | |
| 3420 relocate(dst.reloc()); | |
| 3421 const int short_size = 2; | |
| 3422 const int long_size = 6; | |
| 3423 int offs = (intptr_t)dst.target() - ((intptr_t)pc()); | |
| 3424 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) { | |
| 3425 // 0111 tttn #8-bit disp | |
|
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diff
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|
3426 emit_int8(0x70 | cc); |
|
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diff
changeset
|
3427 emit_int8((offs - short_size) & 0xFF); |
| 7199 | 3428 } else { |
| 3429 // 0000 1111 1000 tttn #32-bit disp | |
|
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diff
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|
3430 emit_int8(0x0F); |
|
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diff
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|
3431 emit_int8((unsigned char)(0x80 | cc)); |
|
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ffa87474d7a4
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7475
diff
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|
3432 emit_int32(offs - long_size); |
| 7199 | 3433 } |
| 3434 } else { | |
| 3435 #ifdef ASSERT | |
| 3436 warning("reversing conditional branch"); | |
| 3437 #endif /* ASSERT */ | |
| 3438 Label skip; | |
| 3439 jccb(reverse[cc], skip); | |
| 3440 lea(rscratch1, dst); | |
| 3441 Assembler::jmp(rscratch1); | |
| 3442 bind(skip); | |
| 3443 } | |
| 3444 } | |
| 3445 | |
| 3446 void MacroAssembler::ldmxcsr(AddressLiteral src) { | |
| 3447 if (reachable(src)) { | |
| 3448 Assembler::ldmxcsr(as_Address(src)); | |
| 3449 } else { | |
| 3450 lea(rscratch1, src); | |
| 3451 Assembler::ldmxcsr(Address(rscratch1, 0)); | |
| 3452 } | |
| 3453 } | |
| 3454 | |
| 3455 int MacroAssembler::load_signed_byte(Register dst, Address src) { | |
| 3456 int off; | |
| 3457 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
| 3458 off = offset(); | |
| 3459 movsbl(dst, src); // movsxb | |
| 3460 } else { | |
| 3461 off = load_unsigned_byte(dst, src); | |
| 3462 shll(dst, 24); | |
| 3463 sarl(dst, 24); | |
| 3464 } | |
| 3465 return off; | |
| 3466 } | |
| 3467 | |
| 3468 // Note: load_signed_short used to be called load_signed_word. | |
| 3469 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler | |
| 3470 // manual, which means 16 bits, that usage is found nowhere in HotSpot code. | |
| 3471 // The term "word" in HotSpot means a 32- or 64-bit machine word. | |
| 3472 int MacroAssembler::load_signed_short(Register dst, Address src) { | |
| 3473 int off; | |
| 3474 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
| 3475 // This is dubious to me since it seems safe to do a signed 16 => 64 bit | |
| 3476 // version but this is what 64bit has always done. This seems to imply | |
| 3477 // that users are only using 32bits worth. | |
| 3478 off = offset(); | |
| 3479 movswl(dst, src); // movsxw | |
| 3480 } else { | |
| 3481 off = load_unsigned_short(dst, src); | |
| 3482 shll(dst, 16); | |
| 3483 sarl(dst, 16); | |
| 3484 } | |
| 3485 return off; | |
| 3486 } | |
| 3487 | |
| 3488 int MacroAssembler::load_unsigned_byte(Register dst, Address src) { | |
| 3489 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, | |
| 3490 // and "3.9 Partial Register Penalties", p. 22). | |
| 3491 int off; | |
| 3492 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) { | |
| 3493 off = offset(); | |
| 3494 movzbl(dst, src); // movzxb | |
| 3495 } else { | |
| 3496 xorl(dst, dst); | |
| 3497 off = offset(); | |
| 3498 movb(dst, src); | |
| 3499 } | |
| 3500 return off; | |
| 3501 } | |
| 3502 | |
| 3503 // Note: load_unsigned_short used to be called load_unsigned_word. | |
| 3504 int MacroAssembler::load_unsigned_short(Register dst, Address src) { | |
| 3505 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, | |
| 3506 // and "3.9 Partial Register Penalties", p. 22). | |
| 3507 int off; | |
| 3508 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) { | |
| 3509 off = offset(); | |
| 3510 movzwl(dst, src); // movzxw | |
| 3511 } else { | |
| 3512 xorl(dst, dst); | |
| 3513 off = offset(); | |
| 3514 movw(dst, src); | |
| 3515 } | |
| 3516 return off; | |
| 3517 } | |
| 3518 | |
| 3519 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) { | |
| 3520 switch (size_in_bytes) { | |
| 3521 #ifndef _LP64 | |
| 3522 case 8: | |
| 3523 assert(dst2 != noreg, "second dest register required"); | |
| 3524 movl(dst, src); | |
| 3525 movl(dst2, src.plus_disp(BytesPerInt)); | |
| 3526 break; | |
| 3527 #else | |
| 3528 case 8: movq(dst, src); break; | |
| 3529 #endif | |
| 3530 case 4: movl(dst, src); break; | |
| 3531 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break; | |
| 3532 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break; | |
| 3533 default: ShouldNotReachHere(); | |
| 3534 } | |
| 3535 } | |
| 3536 | |
| 3537 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) { | |
| 3538 switch (size_in_bytes) { | |
| 3539 #ifndef _LP64 | |
| 3540 case 8: | |
| 3541 assert(src2 != noreg, "second source register required"); | |
| 3542 movl(dst, src); | |
| 3543 movl(dst.plus_disp(BytesPerInt), src2); | |
| 3544 break; | |
| 3545 #else | |
| 3546 case 8: movq(dst, src); break; | |
| 3547 #endif | |
| 3548 case 4: movl(dst, src); break; | |
| 3549 case 2: movw(dst, src); break; | |
| 3550 case 1: movb(dst, src); break; | |
| 3551 default: ShouldNotReachHere(); | |
| 3552 } | |
| 3553 } | |
| 3554 | |
| 3555 void MacroAssembler::mov32(AddressLiteral dst, Register src) { | |
| 3556 if (reachable(dst)) { | |
| 3557 movl(as_Address(dst), src); | |
| 3558 } else { | |
| 3559 lea(rscratch1, dst); | |
| 3560 movl(Address(rscratch1, 0), src); | |
| 3561 } | |
| 3562 } | |
| 3563 | |
| 3564 void MacroAssembler::mov32(Register dst, AddressLiteral src) { | |
| 3565 if (reachable(src)) { | |
| 3566 movl(dst, as_Address(src)); | |
| 3567 } else { | |
| 3568 lea(rscratch1, src); | |
| 3569 movl(dst, Address(rscratch1, 0)); | |
| 3570 } | |
| 3571 } | |
| 3572 | |
| 3573 // C++ bool manipulation | |
| 3574 | |
| 3575 void MacroAssembler::movbool(Register dst, Address src) { | |
| 3576 if(sizeof(bool) == 1) | |
| 3577 movb(dst, src); | |
| 3578 else if(sizeof(bool) == 2) | |
| 3579 movw(dst, src); | |
| 3580 else if(sizeof(bool) == 4) | |
| 3581 movl(dst, src); | |
| 3582 else | |
| 3583 // unsupported | |
| 3584 ShouldNotReachHere(); | |
| 3585 } | |
| 3586 | |
| 3587 void MacroAssembler::movbool(Address dst, bool boolconst) { | |
| 3588 if(sizeof(bool) == 1) | |
| 3589 movb(dst, (int) boolconst); | |
| 3590 else if(sizeof(bool) == 2) | |
| 3591 movw(dst, (int) boolconst); | |
| 3592 else if(sizeof(bool) == 4) | |
| 3593 movl(dst, (int) boolconst); | |
| 3594 else | |
| 3595 // unsupported | |
| 3596 ShouldNotReachHere(); | |
| 3597 } | |
| 3598 | |
| 3599 void MacroAssembler::movbool(Address dst, Register src) { | |
| 3600 if(sizeof(bool) == 1) | |
| 3601 movb(dst, src); | |
| 3602 else if(sizeof(bool) == 2) | |
| 3603 movw(dst, src); | |
| 3604 else if(sizeof(bool) == 4) | |
| 3605 movl(dst, src); | |
| 3606 else | |
| 3607 // unsupported | |
| 3608 ShouldNotReachHere(); | |
| 3609 } | |
| 3610 | |
| 3611 void MacroAssembler::movbyte(ArrayAddress dst, int src) { | |
| 3612 movb(as_Address(dst), src); | |
| 3613 } | |
| 3614 | |
| 3615 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) { | |
| 3616 if (reachable(src)) { | |
| 3617 movdl(dst, as_Address(src)); | |
| 3618 } else { | |
| 3619 lea(rscratch1, src); | |
| 3620 movdl(dst, Address(rscratch1, 0)); | |
| 3621 } | |
| 3622 } | |
| 3623 | |
| 3624 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) { | |
| 3625 if (reachable(src)) { | |
| 3626 movq(dst, as_Address(src)); | |
| 3627 } else { | |
| 3628 lea(rscratch1, src); | |
| 3629 movq(dst, Address(rscratch1, 0)); | |
| 3630 } | |
| 3631 } | |
| 3632 | |
| 3633 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) { | |
| 3634 if (reachable(src)) { | |
| 3635 if (UseXmmLoadAndClearUpper) { | |
| 3636 movsd (dst, as_Address(src)); | |
| 3637 } else { | |
| 3638 movlpd(dst, as_Address(src)); | |
| 3639 } | |
| 3640 } else { | |
| 3641 lea(rscratch1, src); | |
| 3642 if (UseXmmLoadAndClearUpper) { | |
| 3643 movsd (dst, Address(rscratch1, 0)); | |
| 3644 } else { | |
| 3645 movlpd(dst, Address(rscratch1, 0)); | |
| 3646 } | |
| 3647 } | |
| 3648 } | |
| 3649 | |
| 3650 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) { | |
| 3651 if (reachable(src)) { | |
| 3652 movss(dst, as_Address(src)); | |
| 3653 } else { | |
| 3654 lea(rscratch1, src); | |
| 3655 movss(dst, Address(rscratch1, 0)); | |
| 3656 } | |
| 3657 } | |
| 3658 | |
| 3659 void MacroAssembler::movptr(Register dst, Register src) { | |
| 3660 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
| 3661 } | |
| 3662 | |
| 3663 void MacroAssembler::movptr(Register dst, Address src) { | |
| 3664 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
| 3665 } | |
| 3666 | |
| 3667 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
| 3668 void MacroAssembler::movptr(Register dst, intptr_t src) { | |
| 3669 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src)); | |
| 3670 } | |
| 3671 | |
| 3672 void MacroAssembler::movptr(Address dst, Register src) { | |
| 3673 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
| 3674 } | |
| 3675 | |
| 3676 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src) { | |
| 3677 if (reachable(src)) { | |
| 3678 Assembler::movdqu(dst, as_Address(src)); | |
| 3679 } else { | |
| 3680 lea(rscratch1, src); | |
| 3681 Assembler::movdqu(dst, Address(rscratch1, 0)); | |
| 3682 } | |
| 3683 } | |
| 3684 | |
|
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8873
diff
changeset
|
3685 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) { |
|
b800986664f4
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8873
diff
changeset
|
3686 if (reachable(src)) { |
|
b800986664f4
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8873
diff
changeset
|
3687 Assembler::movdqa(dst, as_Address(src)); |
|
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8873
diff
changeset
|
3688 } else { |
|
b800986664f4
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8873
diff
changeset
|
3689 lea(rscratch1, src); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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8873
diff
changeset
|
3690 Assembler::movdqa(dst, Address(rscratch1, 0)); |
|
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8873
diff
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|
3691 } |
|
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8873
diff
changeset
|
3692 } |
|
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|
3693 |
| 7199 | 3694 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) { |
| 3695 if (reachable(src)) { | |
| 3696 Assembler::movsd(dst, as_Address(src)); | |
| 3697 } else { | |
| 3698 lea(rscratch1, src); | |
| 3699 Assembler::movsd(dst, Address(rscratch1, 0)); | |
| 3700 } | |
| 3701 } | |
| 3702 | |
| 3703 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) { | |
| 3704 if (reachable(src)) { | |
| 3705 Assembler::movss(dst, as_Address(src)); | |
| 3706 } else { | |
| 3707 lea(rscratch1, src); | |
| 3708 Assembler::movss(dst, Address(rscratch1, 0)); | |
| 3709 } | |
| 3710 } | |
| 3711 | |
| 3712 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) { | |
| 3713 if (reachable(src)) { | |
| 3714 Assembler::mulsd(dst, as_Address(src)); | |
| 3715 } else { | |
| 3716 lea(rscratch1, src); | |
| 3717 Assembler::mulsd(dst, Address(rscratch1, 0)); | |
| 3718 } | |
| 3719 } | |
| 3720 | |
| 3721 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) { | |
| 3722 if (reachable(src)) { | |
| 3723 Assembler::mulss(dst, as_Address(src)); | |
| 3724 } else { | |
| 3725 lea(rscratch1, src); | |
| 3726 Assembler::mulss(dst, Address(rscratch1, 0)); | |
| 3727 } | |
| 3728 } | |
| 3729 | |
| 3730 void MacroAssembler::null_check(Register reg, int offset) { | |
| 3731 if (needs_explicit_null_check(offset)) { | |
| 3732 // provoke OS NULL exception if reg = NULL by | |
| 3733 // accessing M[reg] w/o changing any (non-CC) registers | |
| 3734 // NOTE: cmpl is plenty here to provoke a segv | |
| 3735 cmpptr(rax, Address(reg, 0)); | |
| 3736 // Note: should probably use testl(rax, Address(reg, 0)); | |
| 3737 // may be shorter code (however, this version of | |
| 3738 // testl needs to be implemented first) | |
| 3739 } else { | |
| 3740 // nothing to do, (later) access of M[reg + offset] | |
| 3741 // will provoke OS NULL exception if reg = NULL | |
| 3742 } | |
| 3743 } | |
| 3744 | |
| 3745 void MacroAssembler::os_breakpoint() { | |
| 3746 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability | |
| 3747 // (e.g., MSVC can't call ps() otherwise) | |
| 3748 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); | |
| 3749 } | |
| 3750 | |
| 3751 void MacroAssembler::pop_CPU_state() { | |
| 3752 pop_FPU_state(); | |
| 3753 pop_IU_state(); | |
| 3754 } | |
| 3755 | |
| 3756 void MacroAssembler::pop_FPU_state() { | |
| 3757 NOT_LP64(frstor(Address(rsp, 0));) | |
| 3758 LP64_ONLY(fxrstor(Address(rsp, 0));) | |
| 3759 addptr(rsp, FPUStateSizeInWords * wordSize); | |
| 3760 } | |
| 3761 | |
| 3762 void MacroAssembler::pop_IU_state() { | |
| 3763 popa(); | |
| 3764 LP64_ONLY(addq(rsp, 8)); | |
| 3765 popf(); | |
| 3766 } | |
| 3767 | |
| 3768 // Save Integer and Float state | |
| 3769 // Warning: Stack must be 16 byte aligned (64bit) | |
| 3770 void MacroAssembler::push_CPU_state() { | |
| 3771 push_IU_state(); | |
| 3772 push_FPU_state(); | |
| 3773 } | |
| 3774 | |
| 3775 void MacroAssembler::push_FPU_state() { | |
| 3776 subptr(rsp, FPUStateSizeInWords * wordSize); | |
| 3777 #ifndef _LP64 | |
| 3778 fnsave(Address(rsp, 0)); | |
| 3779 fwait(); | |
| 3780 #else | |
| 3781 fxsave(Address(rsp, 0)); | |
| 3782 #endif // LP64 | |
| 3783 } | |
| 3784 | |
| 3785 void MacroAssembler::push_IU_state() { | |
| 3786 // Push flags first because pusha kills them | |
| 3787 pushf(); | |
| 3788 // Make sure rsp stays 16-byte aligned | |
| 3789 LP64_ONLY(subq(rsp, 8)); | |
| 3790 pusha(); | |
| 3791 } | |
| 3792 | |
| 3793 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) { | |
| 3794 // determine java_thread register | |
| 3795 if (!java_thread->is_valid()) { | |
| 3796 java_thread = rdi; | |
| 3797 get_thread(java_thread); | |
| 3798 } | |
| 3799 // we must set sp to zero to clear frame | |
| 3800 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); | |
| 3801 if (clear_fp) { | |
| 3802 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); | |
| 3803 } | |
| 3804 | |
| 3805 if (clear_pc) | |
| 3806 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); | |
| 3807 | |
| 3808 } | |
| 3809 | |
| 3810 void MacroAssembler::restore_rax(Register tmp) { | |
| 3811 if (tmp == noreg) pop(rax); | |
| 3812 else if (tmp != rax) mov(rax, tmp); | |
| 3813 } | |
| 3814 | |
| 3815 void MacroAssembler::round_to(Register reg, int modulus) { | |
| 3816 addptr(reg, modulus - 1); | |
| 3817 andptr(reg, -modulus); | |
| 3818 } | |
| 3819 | |
| 3820 void MacroAssembler::save_rax(Register tmp) { | |
| 3821 if (tmp == noreg) push(rax); | |
| 3822 else if (tmp != rax) mov(tmp, rax); | |
| 3823 } | |
| 3824 | |
| 3825 // Write serialization page so VM thread can do a pseudo remote membar. | |
| 3826 // We use the current thread pointer to calculate a thread specific | |
| 3827 // offset to write to within the page. This minimizes bus traffic | |
| 3828 // due to cache line collision. | |
| 3829 void MacroAssembler::serialize_memory(Register thread, Register tmp) { | |
| 3830 movl(tmp, thread); | |
| 3831 shrl(tmp, os::get_serialize_page_shift_count()); | |
| 3832 andl(tmp, (os::vm_page_size() - sizeof(int))); | |
| 3833 | |
| 3834 Address index(noreg, tmp, Address::times_1); | |
| 3835 ExternalAddress page(os::get_memory_serialize_page()); | |
| 3836 | |
| 3837 // Size of store must match masking code above | |
| 3838 movl(as_Address(ArrayAddress(page, index)), tmp); | |
| 3839 } | |
| 3840 | |
| 3841 // Calls to C land | |
| 3842 // | |
| 3843 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded | |
| 3844 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp | |
| 3845 // has to be reset to 0. This is required to allow proper stack traversal. | |
| 3846 void MacroAssembler::set_last_Java_frame(Register java_thread, | |
| 3847 Register last_java_sp, | |
| 3848 Register last_java_fp, | |
| 3849 address last_java_pc) { | |
| 3850 // determine java_thread register | |
| 3851 if (!java_thread->is_valid()) { | |
| 3852 java_thread = rdi; | |
| 3853 get_thread(java_thread); | |
| 3854 } | |
| 3855 // determine last_java_sp register | |
| 3856 if (!last_java_sp->is_valid()) { | |
| 3857 last_java_sp = rsp; | |
| 3858 } | |
| 3859 | |
| 3860 // last_java_fp is optional | |
| 3861 | |
| 3862 if (last_java_fp->is_valid()) { | |
| 3863 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp); | |
| 3864 } | |
| 3865 | |
| 3866 // last_java_pc is optional | |
| 3867 | |
| 3868 if (last_java_pc != NULL) { | |
| 3869 lea(Address(java_thread, | |
| 3870 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()), | |
| 3871 InternalAddress(last_java_pc)); | |
| 3872 | |
| 3873 } | |
| 3874 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp); | |
| 3875 } | |
| 3876 | |
| 3877 void MacroAssembler::shlptr(Register dst, int imm8) { | |
| 3878 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8)); | |
| 3879 } | |
| 3880 | |
| 3881 void MacroAssembler::shrptr(Register dst, int imm8) { | |
| 3882 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8)); | |
| 3883 } | |
| 3884 | |
| 3885 void MacroAssembler::sign_extend_byte(Register reg) { | |
| 3886 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) { | |
| 3887 movsbl(reg, reg); // movsxb | |
| 3888 } else { | |
| 3889 shll(reg, 24); | |
| 3890 sarl(reg, 24); | |
| 3891 } | |
| 3892 } | |
| 3893 | |
| 3894 void MacroAssembler::sign_extend_short(Register reg) { | |
| 3895 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
| 3896 movswl(reg, reg); // movsxw | |
| 3897 } else { | |
| 3898 shll(reg, 16); | |
| 3899 sarl(reg, 16); | |
| 3900 } | |
| 3901 } | |
| 3902 | |
| 3903 void MacroAssembler::testl(Register dst, AddressLiteral src) { | |
| 3904 assert(reachable(src), "Address should be reachable"); | |
| 3905 testl(dst, as_Address(src)); | |
| 3906 } | |
| 3907 | |
| 3908 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) { | |
| 3909 if (reachable(src)) { | |
| 3910 Assembler::sqrtsd(dst, as_Address(src)); | |
| 3911 } else { | |
| 3912 lea(rscratch1, src); | |
| 3913 Assembler::sqrtsd(dst, Address(rscratch1, 0)); | |
| 3914 } | |
| 3915 } | |
| 3916 | |
| 3917 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) { | |
| 3918 if (reachable(src)) { | |
| 3919 Assembler::sqrtss(dst, as_Address(src)); | |
| 3920 } else { | |
| 3921 lea(rscratch1, src); | |
| 3922 Assembler::sqrtss(dst, Address(rscratch1, 0)); | |
| 3923 } | |
| 3924 } | |
| 3925 | |
| 3926 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) { | |
| 3927 if (reachable(src)) { | |
| 3928 Assembler::subsd(dst, as_Address(src)); | |
| 3929 } else { | |
| 3930 lea(rscratch1, src); | |
| 3931 Assembler::subsd(dst, Address(rscratch1, 0)); | |
| 3932 } | |
| 3933 } | |
| 3934 | |
| 3935 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) { | |
| 3936 if (reachable(src)) { | |
| 3937 Assembler::subss(dst, as_Address(src)); | |
| 3938 } else { | |
| 3939 lea(rscratch1, src); | |
| 3940 Assembler::subss(dst, Address(rscratch1, 0)); | |
| 3941 } | |
| 3942 } | |
| 3943 | |
| 3944 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) { | |
| 3945 if (reachable(src)) { | |
| 3946 Assembler::ucomisd(dst, as_Address(src)); | |
| 3947 } else { | |
| 3948 lea(rscratch1, src); | |
| 3949 Assembler::ucomisd(dst, Address(rscratch1, 0)); | |
| 3950 } | |
| 3951 } | |
| 3952 | |
| 3953 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) { | |
| 3954 if (reachable(src)) { | |
| 3955 Assembler::ucomiss(dst, as_Address(src)); | |
| 3956 } else { | |
| 3957 lea(rscratch1, src); | |
| 3958 Assembler::ucomiss(dst, Address(rscratch1, 0)); | |
| 3959 } | |
| 3960 } | |
| 3961 | |
| 3962 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) { | |
| 3963 // Used in sign-bit flipping with aligned address. | |
| 3964 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 3965 if (reachable(src)) { | |
| 3966 Assembler::xorpd(dst, as_Address(src)); | |
| 3967 } else { | |
| 3968 lea(rscratch1, src); | |
| 3969 Assembler::xorpd(dst, Address(rscratch1, 0)); | |
| 3970 } | |
| 3971 } | |
| 3972 | |
| 3973 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) { | |
| 3974 // Used in sign-bit flipping with aligned address. | |
| 3975 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 3976 if (reachable(src)) { | |
| 3977 Assembler::xorps(dst, as_Address(src)); | |
| 3978 } else { | |
| 3979 lea(rscratch1, src); | |
| 3980 Assembler::xorps(dst, Address(rscratch1, 0)); | |
| 3981 } | |
| 3982 } | |
| 3983 | |
| 3984 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) { | |
| 3985 // Used in sign-bit flipping with aligned address. | |
| 7427 | 3986 bool aligned_adr = (((intptr_t)src.target() & 15) == 0); |
| 3987 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes"); | |
| 7199 | 3988 if (reachable(src)) { |
| 3989 Assembler::pshufb(dst, as_Address(src)); | |
| 3990 } else { | |
| 3991 lea(rscratch1, src); | |
| 3992 Assembler::pshufb(dst, Address(rscratch1, 0)); | |
| 3993 } | |
| 3994 } | |
| 3995 | |
| 3996 // AVX 3-operands instructions | |
| 3997 | |
| 3998 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3999 if (reachable(src)) { | |
| 4000 vaddsd(dst, nds, as_Address(src)); | |
| 4001 } else { | |
| 4002 lea(rscratch1, src); | |
| 4003 vaddsd(dst, nds, Address(rscratch1, 0)); | |
| 4004 } | |
| 4005 } | |
| 4006 | |
| 4007 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4008 if (reachable(src)) { | |
| 4009 vaddss(dst, nds, as_Address(src)); | |
| 4010 } else { | |
| 4011 lea(rscratch1, src); | |
| 4012 vaddss(dst, nds, Address(rscratch1, 0)); | |
| 4013 } | |
| 4014 } | |
| 4015 | |
| 4016 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 4017 if (reachable(src)) { | |
| 4018 vandpd(dst, nds, as_Address(src), vector256); | |
| 4019 } else { | |
| 4020 lea(rscratch1, src); | |
| 4021 vandpd(dst, nds, Address(rscratch1, 0), vector256); | |
| 4022 } | |
| 4023 } | |
| 4024 | |
| 4025 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 4026 if (reachable(src)) { | |
| 4027 vandps(dst, nds, as_Address(src), vector256); | |
| 4028 } else { | |
| 4029 lea(rscratch1, src); | |
| 4030 vandps(dst, nds, Address(rscratch1, 0), vector256); | |
| 4031 } | |
| 4032 } | |
| 4033 | |
| 4034 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4035 if (reachable(src)) { | |
| 4036 vdivsd(dst, nds, as_Address(src)); | |
| 4037 } else { | |
| 4038 lea(rscratch1, src); | |
| 4039 vdivsd(dst, nds, Address(rscratch1, 0)); | |
| 4040 } | |
| 4041 } | |
| 4042 | |
| 4043 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4044 if (reachable(src)) { | |
| 4045 vdivss(dst, nds, as_Address(src)); | |
| 4046 } else { | |
| 4047 lea(rscratch1, src); | |
| 4048 vdivss(dst, nds, Address(rscratch1, 0)); | |
| 4049 } | |
| 4050 } | |
| 4051 | |
| 4052 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4053 if (reachable(src)) { | |
| 4054 vmulsd(dst, nds, as_Address(src)); | |
| 4055 } else { | |
| 4056 lea(rscratch1, src); | |
| 4057 vmulsd(dst, nds, Address(rscratch1, 0)); | |
| 4058 } | |
| 4059 } | |
| 4060 | |
| 4061 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4062 if (reachable(src)) { | |
| 4063 vmulss(dst, nds, as_Address(src)); | |
| 4064 } else { | |
| 4065 lea(rscratch1, src); | |
| 4066 vmulss(dst, nds, Address(rscratch1, 0)); | |
| 4067 } | |
| 4068 } | |
| 4069 | |
| 4070 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4071 if (reachable(src)) { | |
| 4072 vsubsd(dst, nds, as_Address(src)); | |
| 4073 } else { | |
| 4074 lea(rscratch1, src); | |
| 4075 vsubsd(dst, nds, Address(rscratch1, 0)); | |
| 4076 } | |
| 4077 } | |
| 4078 | |
| 4079 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 4080 if (reachable(src)) { | |
| 4081 vsubss(dst, nds, as_Address(src)); | |
| 4082 } else { | |
| 4083 lea(rscratch1, src); | |
| 4084 vsubss(dst, nds, Address(rscratch1, 0)); | |
| 4085 } | |
| 4086 } | |
| 4087 | |
| 4088 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 4089 if (reachable(src)) { | |
| 4090 vxorpd(dst, nds, as_Address(src), vector256); | |
| 4091 } else { | |
| 4092 lea(rscratch1, src); | |
| 4093 vxorpd(dst, nds, Address(rscratch1, 0), vector256); | |
| 4094 } | |
| 4095 } | |
| 4096 | |
| 4097 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 4098 if (reachable(src)) { | |
| 4099 vxorps(dst, nds, as_Address(src), vector256); | |
| 4100 } else { | |
| 4101 lea(rscratch1, src); | |
| 4102 vxorps(dst, nds, Address(rscratch1, 0), vector256); | |
| 4103 } | |
| 4104 } | |
| 4105 | |
| 4106 | |
| 4107 ////////////////////////////////////////////////////////////////////////////////// | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7477
diff
changeset
|
4108 #if INCLUDE_ALL_GCS |
| 7199 | 4109 |
| 4110 void MacroAssembler::g1_write_barrier_pre(Register obj, | |
| 4111 Register pre_val, | |
| 4112 Register thread, | |
| 4113 Register tmp, | |
| 4114 bool tosca_live, | |
| 4115 bool expand_call) { | |
| 4116 | |
| 4117 // If expand_call is true then we expand the call_VM_leaf macro | |
| 4118 // directly to skip generating the check by | |
| 4119 // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp. | |
| 4120 | |
| 4121 #ifdef _LP64 | |
| 4122 assert(thread == r15_thread, "must be"); | |
| 4123 #endif // _LP64 | |
| 4124 | |
| 4125 Label done; | |
| 4126 Label runtime; | |
| 4127 | |
| 4128 assert(pre_val != noreg, "check this code"); | |
| 4129 | |
| 4130 if (obj != noreg) { | |
| 4131 assert_different_registers(obj, pre_val, tmp); | |
| 4132 assert(pre_val != rax, "check this code"); | |
| 4133 } | |
| 4134 | |
| 4135 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
| 4136 PtrQueue::byte_offset_of_active())); | |
| 4137 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
| 4138 PtrQueue::byte_offset_of_index())); | |
| 4139 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
| 4140 PtrQueue::byte_offset_of_buf())); | |
| 4141 | |
| 4142 | |
| 4143 // Is marking active? | |
| 4144 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { | |
| 4145 cmpl(in_progress, 0); | |
| 4146 } else { | |
| 4147 assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption"); | |
| 4148 cmpb(in_progress, 0); | |
| 4149 } | |
| 4150 jcc(Assembler::equal, done); | |
| 4151 | |
| 4152 // Do we need to load the previous value? | |
| 4153 if (obj != noreg) { | |
| 4154 load_heap_oop(pre_val, Address(obj, 0)); | |
| 4155 } | |
| 4156 | |
| 4157 // Is the previous value null? | |
| 4158 cmpptr(pre_val, (int32_t) NULL_WORD); | |
| 4159 jcc(Assembler::equal, done); | |
| 4160 | |
| 4161 // Can we store original value in the thread's buffer? | |
| 4162 // Is index == 0? | |
| 4163 // (The index field is typed as size_t.) | |
| 4164 | |
| 4165 movptr(tmp, index); // tmp := *index_adr | |
| 4166 cmpptr(tmp, 0); // tmp == 0? | |
| 4167 jcc(Assembler::equal, runtime); // If yes, goto runtime | |
| 4168 | |
| 4169 subptr(tmp, wordSize); // tmp := tmp - wordSize | |
| 4170 movptr(index, tmp); // *index_adr := tmp | |
| 4171 addptr(tmp, buffer); // tmp := tmp + *buffer_adr | |
| 4172 | |
| 4173 // Record the previous value | |
| 4174 movptr(Address(tmp, 0), pre_val); | |
| 4175 jmp(done); | |
| 4176 | |
| 4177 bind(runtime); | |
| 4178 // save the live input values | |
| 4179 if(tosca_live) push(rax); | |
| 4180 | |
| 4181 if (obj != noreg && obj != rax) | |
| 4182 push(obj); | |
| 4183 | |
| 4184 if (pre_val != rax) | |
| 4185 push(pre_val); | |
| 4186 | |
| 4187 // Calling the runtime using the regular call_VM_leaf mechanism generates | |
| 4188 // code (generated by InterpreterMacroAssember::call_VM_leaf_base) | |
| 4189 // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL. | |
| 4190 // | |
| 4191 // If we care generating the pre-barrier without a frame (e.g. in the | |
| 4192 // intrinsified Reference.get() routine) then ebp might be pointing to | |
| 4193 // the caller frame and so this check will most likely fail at runtime. | |
| 4194 // | |
| 4195 // Expanding the call directly bypasses the generation of the check. | |
| 4196 // So when we do not have have a full interpreter frame on the stack | |
| 4197 // expand_call should be passed true. | |
| 4198 | |
| 4199 NOT_LP64( push(thread); ) | |
| 4200 | |
| 4201 if (expand_call) { | |
| 4202 LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); ) | |
| 4203 pass_arg1(this, thread); | |
| 4204 pass_arg0(this, pre_val); | |
| 4205 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), 2); | |
| 4206 } else { | |
| 4207 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread); | |
| 4208 } | |
| 4209 | |
| 4210 NOT_LP64( pop(thread); ) | |
| 4211 | |
| 4212 // save the live input values | |
| 4213 if (pre_val != rax) | |
| 4214 pop(pre_val); | |
| 4215 | |
| 4216 if (obj != noreg && obj != rax) | |
| 4217 pop(obj); | |
| 4218 | |
| 4219 if(tosca_live) pop(rax); | |
| 4220 | |
| 4221 bind(done); | |
| 4222 } | |
| 4223 | |
| 4224 void MacroAssembler::g1_write_barrier_post(Register store_addr, | |
| 4225 Register new_val, | |
| 4226 Register thread, | |
| 4227 Register tmp, | |
| 4228 Register tmp2) { | |
| 4229 #ifdef _LP64 | |
| 4230 assert(thread == r15_thread, "must be"); | |
| 4231 #endif // _LP64 | |
| 4232 | |
| 4233 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() + | |
| 4234 PtrQueue::byte_offset_of_index())); | |
| 4235 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() + | |
| 4236 PtrQueue::byte_offset_of_buf())); | |
| 4237 | |
| 4238 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 4239 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
|
13424
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4240 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4241 |
| 7199 | 4242 Label done; |
| 4243 Label runtime; | |
| 4244 | |
| 4245 // Does store cross heap regions? | |
| 4246 | |
| 4247 movptr(tmp, store_addr); | |
| 4248 xorptr(tmp, new_val); | |
| 4249 shrptr(tmp, HeapRegion::LogOfHRGrainBytes); | |
| 4250 jcc(Assembler::equal, done); | |
| 4251 | |
| 4252 // crosses regions, storing NULL? | |
| 4253 | |
| 4254 cmpptr(new_val, (int32_t) NULL_WORD); | |
| 4255 jcc(Assembler::equal, done); | |
| 4256 | |
| 4257 // storing region crossing non-NULL, is card already dirty? | |
| 4258 | |
| 4259 const Register card_addr = tmp; | |
|
13424
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4260 const Register cardtable = tmp2; |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4261 |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4262 movptr(card_addr, store_addr); |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4263 shrptr(card_addr, CardTableModRefBS::card_shift); |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4264 // Do not use ExternalAddress to load 'byte_map_base', since 'byte_map_base' is NOT |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4265 // a valid address and therefore is not properly handled by the relocation code. |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4266 movptr(cardtable, (intptr_t)ct->byte_map_base); |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4267 addptr(card_addr, cardtable); |
|
61746b5f0ed3
8028109: compiler/codecache/CheckReservedInitialCodeCacheSizeArgOrder.java crashes in RT_Baseline
anoll
parents:
13047
diff
changeset
|
4268 |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4269 cmpb(Address(card_addr, 0), (int)G1SATBCardTableModRefBS::g1_young_card_val()); |
| 7199 | 4270 jcc(Assembler::equal, done); |
| 4271 | |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4272 membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4273 cmpb(Address(card_addr, 0), (int)CardTableModRefBS::dirty_card_val()); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4274 jcc(Assembler::equal, done); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4275 |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4276 |
| 7199 | 4277 // storing a region crossing, non-NULL oop, card is clean. |
| 4278 // dirty card and log. | |
| 4279 | |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12226
diff
changeset
|
4280 movb(Address(card_addr, 0), (int)CardTableModRefBS::dirty_card_val()); |
| 7199 | 4281 |
| 4282 cmpl(queue_index, 0); | |
| 4283 jcc(Assembler::equal, runtime); | |
| 4284 subl(queue_index, wordSize); | |
| 4285 movptr(tmp2, buffer); | |
| 4286 #ifdef _LP64 | |
| 4287 movslq(rscratch1, queue_index); | |
| 4288 addq(tmp2, rscratch1); | |
| 4289 movq(Address(tmp2, 0), card_addr); | |
| 4290 #else | |
| 4291 addl(tmp2, queue_index); | |
|
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|
4292 movl(Address(tmp2, 0), card_addr); |
| 7199 | 4293 #endif |
| 4294 jmp(done); | |
| 4295 | |
| 4296 bind(runtime); | |
| 4297 // save the live input values | |
| 4298 push(store_addr); | |
| 4299 push(new_val); | |
| 4300 #ifdef _LP64 | |
| 4301 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread); | |
| 4302 #else | |
| 4303 push(thread); | |
| 4304 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread); | |
| 4305 pop(thread); | |
| 4306 #endif | |
| 4307 pop(new_val); | |
| 4308 pop(store_addr); | |
| 4309 | |
| 4310 bind(done); | |
| 4311 } | |
| 4312 | |
|
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diff
changeset
|
4313 #endif // INCLUDE_ALL_GCS |
| 7199 | 4314 ////////////////////////////////////////////////////////////////////////////////// |
| 4315 | |
| 4316 | |
| 4317 void MacroAssembler::store_check(Register obj) { | |
| 4318 // Does a store check for the oop in register obj. The content of | |
| 4319 // register obj is destroyed afterwards. | |
| 4320 store_check_part_1(obj); | |
| 4321 store_check_part_2(obj); | |
| 4322 } | |
| 4323 | |
| 4324 void MacroAssembler::store_check(Register obj, Address dst) { | |
| 4325 store_check(obj); | |
| 4326 } | |
| 4327 | |
| 4328 | |
| 4329 // split the store check operation so that other instructions can be scheduled inbetween | |
| 4330 void MacroAssembler::store_check_part_1(Register obj) { | |
| 4331 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 4332 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | |
| 4333 shrptr(obj, CardTableModRefBS::card_shift); | |
| 4334 } | |
| 4335 | |
| 4336 void MacroAssembler::store_check_part_2(Register obj) { | |
| 4337 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 4338 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | |
| 4339 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
| 4340 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
| 4341 | |
| 4342 // The calculation for byte_map_base is as follows: | |
| 4343 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift); | |
|
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|
4344 // So this essentially converts an address to a displacement and it will |
|
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diff
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|
4345 // never need to be relocated. On 64bit however the value may be too |
|
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diff
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|
4346 // large for a 32bit displacement. |
| 7199 | 4347 intptr_t disp = (intptr_t) ct->byte_map_base; |
| 4348 if (is_simm32(disp)) { | |
| 4349 Address cardtable(noreg, obj, Address::times_1, disp); | |
| 4350 movb(cardtable, 0); | |
| 4351 } else { | |
|
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|
4352 // By doing it as an ExternalAddress 'disp' could be converted to a rip-relative |
|
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diff
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|
4353 // displacement and done in a single instruction given favorable mapping and a |
|
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diff
changeset
|
4354 // smarter version of as_Address. However, 'ExternalAddress' generates a relocation |
|
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diff
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|
4355 // entry and that entry is not properly handled by the relocation code. |
|
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diff
changeset
|
4356 AddressLiteral cardtable((address)ct->byte_map_base, relocInfo::none); |
| 7199 | 4357 Address index(noreg, obj, Address::times_1); |
| 4358 movb(as_Address(ArrayAddress(cardtable, index)), 0); | |
| 4359 } | |
| 4360 } | |
| 4361 | |
| 4362 void MacroAssembler::subptr(Register dst, int32_t imm32) { | |
| 4363 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32)); | |
| 4364 } | |
| 4365 | |
| 4366 // Force generation of a 4 byte immediate value even if it fits into 8bit | |
| 4367 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) { | |
| 4368 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32)); | |
| 4369 } | |
| 4370 | |
| 4371 void MacroAssembler::subptr(Register dst, Register src) { | |
| 4372 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); | |
| 4373 } | |
| 4374 | |
| 4375 // C++ bool manipulation | |
| 4376 void MacroAssembler::testbool(Register dst) { | |
| 4377 if(sizeof(bool) == 1) | |
| 4378 testb(dst, 0xff); | |
| 4379 else if(sizeof(bool) == 2) { | |
| 4380 // testw implementation needed for two byte bools | |
| 4381 ShouldNotReachHere(); | |
| 4382 } else if(sizeof(bool) == 4) | |
| 4383 testl(dst, dst); | |
| 4384 else | |
| 4385 // unsupported | |
| 4386 ShouldNotReachHere(); | |
| 4387 } | |
| 4388 | |
| 4389 void MacroAssembler::testptr(Register dst, Register src) { | |
| 4390 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src)); | |
| 4391 } | |
| 4392 | |
| 4393 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes. | |
| 4394 void MacroAssembler::tlab_allocate(Register obj, | |
| 4395 Register var_size_in_bytes, | |
| 4396 int con_size_in_bytes, | |
| 4397 Register t1, | |
| 4398 Register t2, | |
| 4399 Label& slow_case) { | |
| 4400 assert_different_registers(obj, t1, t2); | |
| 4401 assert_different_registers(obj, var_size_in_bytes, t1); | |
| 4402 Register end = t2; | |
| 4403 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread); | |
| 4404 | |
| 4405 verify_tlab(); | |
| 4406 | |
| 4407 NOT_LP64(get_thread(thread)); | |
| 4408 | |
| 4409 movptr(obj, Address(thread, JavaThread::tlab_top_offset())); | |
| 4410 if (var_size_in_bytes == noreg) { | |
| 4411 lea(end, Address(obj, con_size_in_bytes)); | |
| 4412 } else { | |
| 4413 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); | |
| 4414 } | |
| 4415 cmpptr(end, Address(thread, JavaThread::tlab_end_offset())); | |
| 4416 jcc(Assembler::above, slow_case); | |
| 4417 | |
| 4418 // update the tlab top pointer | |
| 4419 movptr(Address(thread, JavaThread::tlab_top_offset()), end); | |
| 4420 | |
| 4421 // recover var_size_in_bytes if necessary | |
| 4422 if (var_size_in_bytes == end) { | |
| 4423 subptr(var_size_in_bytes, obj); | |
| 4424 } | |
| 4425 verify_tlab(); | |
| 4426 } | |
| 4427 | |
| 4428 // Preserves rbx, and rdx. | |
| 4429 Register MacroAssembler::tlab_refill(Label& retry, | |
| 4430 Label& try_eden, | |
| 4431 Label& slow_case) { | |
| 4432 Register top = rax; | |
| 4433 Register t1 = rcx; | |
| 4434 Register t2 = rsi; | |
| 4435 Register thread_reg = NOT_LP64(rdi) LP64_ONLY(r15_thread); | |
| 4436 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx); | |
| 4437 Label do_refill, discard_tlab; | |
| 4438 | |
| 4439 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
| 4440 // No allocation in the shared eden. | |
| 4441 jmp(slow_case); | |
| 4442 } | |
| 4443 | |
| 4444 NOT_LP64(get_thread(thread_reg)); | |
| 4445 | |
| 4446 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
| 4447 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); | |
| 4448 | |
| 4449 // calculate amount of free space | |
| 4450 subptr(t1, top); | |
| 4451 shrptr(t1, LogHeapWordSize); | |
| 4452 | |
| 4453 // Retain tlab and allocate object in shared space if | |
| 4454 // the amount free in the tlab is too large to discard. | |
| 4455 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset()))); | |
| 4456 jcc(Assembler::lessEqual, discard_tlab); | |
| 4457 | |
| 4458 // Retain | |
| 4459 // %%% yuck as movptr... | |
| 4460 movptr(t2, (int32_t) ThreadLocalAllocBuffer::refill_waste_limit_increment()); | |
| 4461 addptr(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2); | |
| 4462 if (TLABStats) { | |
| 4463 // increment number of slow_allocations | |
| 4464 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1); | |
| 4465 } | |
| 4466 jmp(try_eden); | |
| 4467 | |
| 4468 bind(discard_tlab); | |
| 4469 if (TLABStats) { | |
| 4470 // increment number of refills | |
| 4471 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1); | |
| 4472 // accumulate wastage -- t1 is amount free in tlab | |
| 4473 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1); | |
| 4474 } | |
| 4475 | |
| 4476 // if tlab is currently allocated (top or end != null) then | |
| 4477 // fill [top, end + alignment_reserve) with array object | |
| 4478 testptr(top, top); | |
| 4479 jcc(Assembler::zero, do_refill); | |
| 4480 | |
| 4481 // set up the mark word | |
| 4482 movptr(Address(top, oopDesc::mark_offset_in_bytes()), (intptr_t)markOopDesc::prototype()->copy_set_hash(0x2)); | |
| 4483 // set the length to the remaining space | |
| 4484 subptr(t1, typeArrayOopDesc::header_size(T_INT)); | |
| 4485 addptr(t1, (int32_t)ThreadLocalAllocBuffer::alignment_reserve()); | |
| 4486 shlptr(t1, log2_intptr(HeapWordSize/sizeof(jint))); | |
| 4487 movl(Address(top, arrayOopDesc::length_offset_in_bytes()), t1); | |
| 4488 // set klass to intArrayKlass | |
| 4489 // dubious reloc why not an oop reloc? | |
| 4490 movptr(t1, ExternalAddress((address)Universe::intArrayKlassObj_addr())); | |
| 4491 // store klass last. concurrent gcs assumes klass length is valid if | |
| 4492 // klass field is not null. | |
| 4493 store_klass(top, t1); | |
| 4494 | |
| 4495 movptr(t1, top); | |
| 4496 subptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); | |
| 4497 incr_allocated_bytes(thread_reg, t1, 0); | |
| 4498 | |
| 4499 // refill the tlab with an eden allocation | |
| 4500 bind(do_refill); | |
| 4501 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); | |
| 4502 shlptr(t1, LogHeapWordSize); | |
| 4503 // allocate new tlab, address returned in top | |
| 4504 eden_allocate(top, t1, 0, t2, slow_case); | |
| 4505 | |
| 4506 // Check that t1 was preserved in eden_allocate. | |
| 4507 #ifdef ASSERT | |
| 4508 if (UseTLAB) { | |
| 4509 Label ok; | |
| 4510 Register tsize = rsi; | |
| 4511 assert_different_registers(tsize, thread_reg, t1); | |
| 4512 push(tsize); | |
| 4513 movptr(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); | |
| 4514 shlptr(tsize, LogHeapWordSize); | |
| 4515 cmpptr(t1, tsize); | |
| 4516 jcc(Assembler::equal, ok); | |
| 4517 STOP("assert(t1 != tlab size)"); | |
| 4518 should_not_reach_here(); | |
| 4519 | |
| 4520 bind(ok); | |
| 4521 pop(tsize); | |
| 4522 } | |
| 4523 #endif | |
| 4524 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top); | |
| 4525 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top); | |
| 4526 addptr(top, t1); | |
| 4527 subptr(top, (int32_t)ThreadLocalAllocBuffer::alignment_reserve_in_bytes()); | |
| 4528 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top); | |
| 4529 verify_tlab(); | |
| 4530 jmp(retry); | |
| 4531 | |
| 4532 return thread_reg; // for use by caller | |
| 4533 } | |
| 4534 | |
| 4535 void MacroAssembler::incr_allocated_bytes(Register thread, | |
| 4536 Register var_size_in_bytes, | |
| 4537 int con_size_in_bytes, | |
| 4538 Register t1) { | |
| 4539 if (!thread->is_valid()) { | |
| 4540 #ifdef _LP64 | |
| 4541 thread = r15_thread; | |
| 4542 #else | |
| 4543 assert(t1->is_valid(), "need temp reg"); | |
| 4544 thread = t1; | |
| 4545 get_thread(thread); | |
| 4546 #endif | |
| 4547 } | |
| 4548 | |
| 4549 #ifdef _LP64 | |
| 4550 if (var_size_in_bytes->is_valid()) { | |
| 4551 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); | |
| 4552 } else { | |
| 4553 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); | |
| 4554 } | |
| 4555 #else | |
| 4556 if (var_size_in_bytes->is_valid()) { | |
| 4557 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); | |
| 4558 } else { | |
| 4559 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); | |
| 4560 } | |
| 4561 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0); | |
| 4562 #endif | |
| 4563 } | |
| 4564 | |
| 4565 void MacroAssembler::fp_runtime_fallback(address runtime_entry, int nb_args, int num_fpu_regs_in_use) { | |
| 4566 pusha(); | |
| 4567 | |
| 4568 // if we are coming from c1, xmm registers may be live | |
| 4569 int off = 0; | |
| 4570 if (UseSSE == 1) { | |
| 4571 subptr(rsp, sizeof(jdouble)*8); | |
| 4572 movflt(Address(rsp,off++*sizeof(jdouble)),xmm0); | |
| 4573 movflt(Address(rsp,off++*sizeof(jdouble)),xmm1); | |
| 4574 movflt(Address(rsp,off++*sizeof(jdouble)),xmm2); | |
| 4575 movflt(Address(rsp,off++*sizeof(jdouble)),xmm3); | |
| 4576 movflt(Address(rsp,off++*sizeof(jdouble)),xmm4); | |
| 4577 movflt(Address(rsp,off++*sizeof(jdouble)),xmm5); | |
| 4578 movflt(Address(rsp,off++*sizeof(jdouble)),xmm6); | |
| 4579 movflt(Address(rsp,off++*sizeof(jdouble)),xmm7); | |
| 4580 } else if (UseSSE >= 2) { | |
| 4581 #ifdef COMPILER2 | |
| 4582 if (MaxVectorSize > 16) { | |
| 4583 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); | |
| 4584 // Save upper half of YMM registes | |
| 4585 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 4586 vextractf128h(Address(rsp, 0),xmm0); | |
| 4587 vextractf128h(Address(rsp, 16),xmm1); | |
| 4588 vextractf128h(Address(rsp, 32),xmm2); | |
| 4589 vextractf128h(Address(rsp, 48),xmm3); | |
| 4590 vextractf128h(Address(rsp, 64),xmm4); | |
| 4591 vextractf128h(Address(rsp, 80),xmm5); | |
| 4592 vextractf128h(Address(rsp, 96),xmm6); | |
| 4593 vextractf128h(Address(rsp,112),xmm7); | |
| 4594 #ifdef _LP64 | |
| 4595 vextractf128h(Address(rsp,128),xmm8); | |
| 4596 vextractf128h(Address(rsp,144),xmm9); | |
| 4597 vextractf128h(Address(rsp,160),xmm10); | |
| 4598 vextractf128h(Address(rsp,176),xmm11); | |
| 4599 vextractf128h(Address(rsp,192),xmm12); | |
| 4600 vextractf128h(Address(rsp,208),xmm13); | |
| 4601 vextractf128h(Address(rsp,224),xmm14); | |
| 4602 vextractf128h(Address(rsp,240),xmm15); | |
| 4603 #endif | |
| 4604 } | |
| 4605 #endif | |
| 4606 // Save whole 128bit (16 bytes) XMM regiters | |
| 4607 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 4608 movdqu(Address(rsp,off++*16),xmm0); | |
| 4609 movdqu(Address(rsp,off++*16),xmm1); | |
| 4610 movdqu(Address(rsp,off++*16),xmm2); | |
| 4611 movdqu(Address(rsp,off++*16),xmm3); | |
| 4612 movdqu(Address(rsp,off++*16),xmm4); | |
| 4613 movdqu(Address(rsp,off++*16),xmm5); | |
| 4614 movdqu(Address(rsp,off++*16),xmm6); | |
| 4615 movdqu(Address(rsp,off++*16),xmm7); | |
| 4616 #ifdef _LP64 | |
| 4617 movdqu(Address(rsp,off++*16),xmm8); | |
| 4618 movdqu(Address(rsp,off++*16),xmm9); | |
| 4619 movdqu(Address(rsp,off++*16),xmm10); | |
| 4620 movdqu(Address(rsp,off++*16),xmm11); | |
| 4621 movdqu(Address(rsp,off++*16),xmm12); | |
| 4622 movdqu(Address(rsp,off++*16),xmm13); | |
| 4623 movdqu(Address(rsp,off++*16),xmm14); | |
| 4624 movdqu(Address(rsp,off++*16),xmm15); | |
| 4625 #endif | |
| 4626 } | |
| 4627 | |
| 4628 // Preserve registers across runtime call | |
| 4629 int incoming_argument_and_return_value_offset = -1; | |
| 4630 if (num_fpu_regs_in_use > 1) { | |
| 4631 // Must preserve all other FPU regs (could alternatively convert | |
| 4632 // SharedRuntime::dsin, dcos etc. into assembly routines known not to trash | |
| 4633 // FPU state, but can not trust C compiler) | |
| 4634 NEEDS_CLEANUP; | |
| 4635 // NOTE that in this case we also push the incoming argument(s) to | |
| 4636 // the stack and restore it later; we also use this stack slot to | |
| 4637 // hold the return value from dsin, dcos etc. | |
| 4638 for (int i = 0; i < num_fpu_regs_in_use; i++) { | |
| 4639 subptr(rsp, sizeof(jdouble)); | |
| 4640 fstp_d(Address(rsp, 0)); | |
| 4641 } | |
| 4642 incoming_argument_and_return_value_offset = sizeof(jdouble)*(num_fpu_regs_in_use-1); | |
| 4643 for (int i = nb_args-1; i >= 0; i--) { | |
| 4644 fld_d(Address(rsp, incoming_argument_and_return_value_offset-i*sizeof(jdouble))); | |
| 4645 } | |
| 4646 } | |
| 4647 | |
| 4648 subptr(rsp, nb_args*sizeof(jdouble)); | |
| 4649 for (int i = 0; i < nb_args; i++) { | |
| 4650 fstp_d(Address(rsp, i*sizeof(jdouble))); | |
| 4651 } | |
| 4652 | |
| 4653 #ifdef _LP64 | |
| 4654 if (nb_args > 0) { | |
| 4655 movdbl(xmm0, Address(rsp, 0)); | |
| 4656 } | |
| 4657 if (nb_args > 1) { | |
| 4658 movdbl(xmm1, Address(rsp, sizeof(jdouble))); | |
| 4659 } | |
| 4660 assert(nb_args <= 2, "unsupported number of args"); | |
| 4661 #endif // _LP64 | |
| 4662 | |
| 4663 // NOTE: we must not use call_VM_leaf here because that requires a | |
| 4664 // complete interpreter frame in debug mode -- same bug as 4387334 | |
| 4665 // MacroAssembler::call_VM_leaf_base is perfectly safe and will | |
| 4666 // do proper 64bit abi | |
| 4667 | |
| 4668 NEEDS_CLEANUP; | |
| 4669 // Need to add stack banging before this runtime call if it needs to | |
| 4670 // be taken; however, there is no generic stack banging routine at | |
| 4671 // the MacroAssembler level | |
| 4672 | |
| 4673 MacroAssembler::call_VM_leaf_base(runtime_entry, 0); | |
| 4674 | |
| 4675 #ifdef _LP64 | |
| 4676 movsd(Address(rsp, 0), xmm0); | |
| 4677 fld_d(Address(rsp, 0)); | |
| 4678 #endif // _LP64 | |
| 4679 addptr(rsp, sizeof(jdouble) * nb_args); | |
| 4680 if (num_fpu_regs_in_use > 1) { | |
| 4681 // Must save return value to stack and then restore entire FPU | |
| 4682 // stack except incoming arguments | |
| 4683 fstp_d(Address(rsp, incoming_argument_and_return_value_offset)); | |
| 4684 for (int i = 0; i < num_fpu_regs_in_use - nb_args; i++) { | |
| 4685 fld_d(Address(rsp, 0)); | |
| 4686 addptr(rsp, sizeof(jdouble)); | |
| 4687 } | |
| 4688 fld_d(Address(rsp, (nb_args-1)*sizeof(jdouble))); | |
| 4689 addptr(rsp, sizeof(jdouble) * nb_args); | |
| 4690 } | |
| 4691 | |
| 4692 off = 0; | |
| 4693 if (UseSSE == 1) { | |
| 4694 movflt(xmm0, Address(rsp,off++*sizeof(jdouble))); | |
| 4695 movflt(xmm1, Address(rsp,off++*sizeof(jdouble))); | |
| 4696 movflt(xmm2, Address(rsp,off++*sizeof(jdouble))); | |
| 4697 movflt(xmm3, Address(rsp,off++*sizeof(jdouble))); | |
| 4698 movflt(xmm4, Address(rsp,off++*sizeof(jdouble))); | |
| 4699 movflt(xmm5, Address(rsp,off++*sizeof(jdouble))); | |
| 4700 movflt(xmm6, Address(rsp,off++*sizeof(jdouble))); | |
| 4701 movflt(xmm7, Address(rsp,off++*sizeof(jdouble))); | |
| 4702 addptr(rsp, sizeof(jdouble)*8); | |
| 4703 } else if (UseSSE >= 2) { | |
| 4704 // Restore whole 128bit (16 bytes) XMM regiters | |
| 4705 movdqu(xmm0, Address(rsp,off++*16)); | |
| 4706 movdqu(xmm1, Address(rsp,off++*16)); | |
| 4707 movdqu(xmm2, Address(rsp,off++*16)); | |
| 4708 movdqu(xmm3, Address(rsp,off++*16)); | |
| 4709 movdqu(xmm4, Address(rsp,off++*16)); | |
| 4710 movdqu(xmm5, Address(rsp,off++*16)); | |
| 4711 movdqu(xmm6, Address(rsp,off++*16)); | |
| 4712 movdqu(xmm7, Address(rsp,off++*16)); | |
| 4713 #ifdef _LP64 | |
| 4714 movdqu(xmm8, Address(rsp,off++*16)); | |
| 4715 movdqu(xmm9, Address(rsp,off++*16)); | |
| 4716 movdqu(xmm10, Address(rsp,off++*16)); | |
| 4717 movdqu(xmm11, Address(rsp,off++*16)); | |
| 4718 movdqu(xmm12, Address(rsp,off++*16)); | |
| 4719 movdqu(xmm13, Address(rsp,off++*16)); | |
| 4720 movdqu(xmm14, Address(rsp,off++*16)); | |
| 4721 movdqu(xmm15, Address(rsp,off++*16)); | |
| 4722 #endif | |
| 4723 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 4724 #ifdef COMPILER2 | |
| 4725 if (MaxVectorSize > 16) { | |
| 4726 // Restore upper half of YMM registes. | |
| 4727 vinsertf128h(xmm0, Address(rsp, 0)); | |
| 4728 vinsertf128h(xmm1, Address(rsp, 16)); | |
| 4729 vinsertf128h(xmm2, Address(rsp, 32)); | |
| 4730 vinsertf128h(xmm3, Address(rsp, 48)); | |
| 4731 vinsertf128h(xmm4, Address(rsp, 64)); | |
| 4732 vinsertf128h(xmm5, Address(rsp, 80)); | |
| 4733 vinsertf128h(xmm6, Address(rsp, 96)); | |
| 4734 vinsertf128h(xmm7, Address(rsp,112)); | |
| 4735 #ifdef _LP64 | |
| 4736 vinsertf128h(xmm8, Address(rsp,128)); | |
| 4737 vinsertf128h(xmm9, Address(rsp,144)); | |
| 4738 vinsertf128h(xmm10, Address(rsp,160)); | |
| 4739 vinsertf128h(xmm11, Address(rsp,176)); | |
| 4740 vinsertf128h(xmm12, Address(rsp,192)); | |
| 4741 vinsertf128h(xmm13, Address(rsp,208)); | |
| 4742 vinsertf128h(xmm14, Address(rsp,224)); | |
| 4743 vinsertf128h(xmm15, Address(rsp,240)); | |
| 4744 #endif | |
| 4745 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 4746 } | |
| 4747 #endif | |
| 4748 } | |
| 4749 popa(); | |
| 4750 } | |
| 4751 | |
| 4752 static const double pi_4 = 0.7853981633974483; | |
| 4753 | |
| 4754 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) { | |
| 4755 // A hand-coded argument reduction for values in fabs(pi/4, pi/2) | |
| 4756 // was attempted in this code; unfortunately it appears that the | |
| 4757 // switch to 80-bit precision and back causes this to be | |
| 4758 // unprofitable compared with simply performing a runtime call if | |
| 4759 // the argument is out of the (-pi/4, pi/4) range. | |
| 4760 | |
| 4761 Register tmp = noreg; | |
| 4762 if (!VM_Version::supports_cmov()) { | |
| 4763 // fcmp needs a temporary so preserve rbx, | |
| 4764 tmp = rbx; | |
| 4765 push(tmp); | |
| 4766 } | |
| 4767 | |
| 4768 Label slow_case, done; | |
| 4769 | |
| 4770 ExternalAddress pi4_adr = (address)&pi_4; | |
| 4771 if (reachable(pi4_adr)) { | |
| 4772 // x ?<= pi/4 | |
| 4773 fld_d(pi4_adr); | |
| 4774 fld_s(1); // Stack: X PI/4 X | |
| 4775 fabs(); // Stack: |X| PI/4 X | |
| 4776 fcmp(tmp); | |
| 4777 jcc(Assembler::above, slow_case); | |
| 4778 | |
| 4779 // fastest case: -pi/4 <= x <= pi/4 | |
| 4780 switch(trig) { | |
| 4781 case 's': | |
| 4782 fsin(); | |
| 4783 break; | |
| 4784 case 'c': | |
| 4785 fcos(); | |
| 4786 break; | |
| 4787 case 't': | |
| 4788 ftan(); | |
| 4789 break; | |
| 4790 default: | |
| 4791 assert(false, "bad intrinsic"); | |
| 4792 break; | |
| 4793 } | |
| 4794 jmp(done); | |
| 4795 } | |
| 4796 | |
| 4797 // slow case: runtime call | |
| 4798 bind(slow_case); | |
| 4799 | |
| 4800 switch(trig) { | |
| 4801 case 's': | |
| 4802 { | |
| 4803 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 1, num_fpu_regs_in_use); | |
| 4804 } | |
| 4805 break; | |
| 4806 case 'c': | |
| 4807 { | |
| 4808 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 1, num_fpu_regs_in_use); | |
| 4809 } | |
| 4810 break; | |
| 4811 case 't': | |
| 4812 { | |
| 4813 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 1, num_fpu_regs_in_use); | |
| 4814 } | |
| 4815 break; | |
| 4816 default: | |
| 4817 assert(false, "bad intrinsic"); | |
| 4818 break; | |
| 4819 } | |
| 4820 | |
| 4821 // Come here with result in F-TOS | |
| 4822 bind(done); | |
| 4823 | |
| 4824 if (tmp != noreg) { | |
| 4825 pop(tmp); | |
| 4826 } | |
| 4827 } | |
| 4828 | |
| 4829 | |
| 4830 // Look up the method for a megamorphic invokeinterface call. | |
| 4831 // The target method is determined by <intf_klass, itable_index>. | |
| 4832 // The receiver klass is in recv_klass. | |
| 4833 // On success, the result will be in method_result, and execution falls through. | |
| 4834 // On failure, execution transfers to the given label. | |
| 4835 void MacroAssembler::lookup_interface_method(Register recv_klass, | |
| 4836 Register intf_klass, | |
| 4837 RegisterOrConstant itable_index, | |
| 4838 Register method_result, | |
| 4839 Register scan_temp, | |
| 4840 Label& L_no_such_interface) { | |
| 4841 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); | |
| 4842 assert(itable_index.is_constant() || itable_index.as_register() == method_result, | |
| 4843 "caller must use same register for non-constant itable index as for method"); | |
| 4844 | |
| 4845 // Compute start of first itableOffsetEntry (which is at the end of the vtable) | |
| 4846 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize; | |
| 4847 int itentry_off = itableMethodEntry::method_offset_in_bytes(); | |
| 4848 int scan_step = itableOffsetEntry::size() * wordSize; | |
| 4849 int vte_size = vtableEntry::size() * wordSize; | |
| 4850 Address::ScaleFactor times_vte_scale = Address::times_ptr; | |
| 4851 assert(vte_size == wordSize, "else adjust times_vte_scale"); | |
| 4852 | |
| 4853 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize)); | |
| 4854 | |
| 4855 // %%% Could store the aligned, prescaled offset in the klassoop. | |
| 4856 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base)); | |
| 4857 if (HeapWordsPerLong > 1) { | |
| 4858 // Round up to align_object_offset boundary | |
| 4859 // see code for InstanceKlass::start_of_itable! | |
| 4860 round_to(scan_temp, BytesPerLong); | |
| 4861 } | |
| 4862 | |
| 4863 // Adjust recv_klass by scaled itable_index, so we can free itable_index. | |
| 4864 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); | |
| 4865 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off)); | |
| 4866 | |
| 4867 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { | |
| 4868 // if (scan->interface() == intf) { | |
| 4869 // result = (klass + scan->offset() + itable_index); | |
| 4870 // } | |
| 4871 // } | |
| 4872 Label search, found_method; | |
| 4873 | |
| 4874 for (int peel = 1; peel >= 0; peel--) { | |
| 4875 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes())); | |
| 4876 cmpptr(intf_klass, method_result); | |
| 4877 | |
| 4878 if (peel) { | |
| 4879 jccb(Assembler::equal, found_method); | |
| 4880 } else { | |
| 4881 jccb(Assembler::notEqual, search); | |
| 4882 // (invert the test to fall through to found_method...) | |
| 4883 } | |
| 4884 | |
| 4885 if (!peel) break; | |
| 4886 | |
| 4887 bind(search); | |
| 4888 | |
| 4889 // Check that the previous entry is non-null. A null entry means that | |
| 4890 // the receiver class doesn't implement the interface, and wasn't the | |
| 4891 // same as when the caller was compiled. | |
| 4892 testptr(method_result, method_result); | |
| 4893 jcc(Assembler::zero, L_no_such_interface); | |
| 4894 addptr(scan_temp, scan_step); | |
| 4895 } | |
| 4896 | |
| 4897 bind(found_method); | |
| 4898 | |
| 4899 // Got a hit. | |
| 4900 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes())); | |
| 4901 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1)); | |
| 4902 } | |
| 4903 | |
| 4904 | |
| 4905 // virtual method calling | |
| 4906 void MacroAssembler::lookup_virtual_method(Register recv_klass, | |
| 4907 RegisterOrConstant vtable_index, | |
| 4908 Register method_result) { | |
| 4909 const int base = InstanceKlass::vtable_start_offset() * wordSize; | |
| 4910 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below"); | |
| 4911 Address vtable_entry_addr(recv_klass, | |
| 4912 vtable_index, Address::times_ptr, | |
| 4913 base + vtableEntry::method_offset_in_bytes()); | |
| 4914 movptr(method_result, vtable_entry_addr); | |
| 4915 } | |
| 4916 | |
| 4917 | |
| 4918 void MacroAssembler::check_klass_subtype(Register sub_klass, | |
| 4919 Register super_klass, | |
| 4920 Register temp_reg, | |
| 4921 Label& L_success) { | |
| 4922 Label L_failure; | |
| 4923 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL); | |
| 4924 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL); | |
| 4925 bind(L_failure); | |
| 4926 } | |
| 4927 | |
| 4928 | |
| 4929 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, | |
| 4930 Register super_klass, | |
| 4931 Register temp_reg, | |
| 4932 Label* L_success, | |
| 4933 Label* L_failure, | |
| 4934 Label* L_slow_path, | |
| 4935 RegisterOrConstant super_check_offset) { | |
| 4936 assert_different_registers(sub_klass, super_klass, temp_reg); | |
| 4937 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); | |
| 4938 if (super_check_offset.is_register()) { | |
| 4939 assert_different_registers(sub_klass, super_klass, | |
| 4940 super_check_offset.as_register()); | |
| 4941 } else if (must_load_sco) { | |
| 4942 assert(temp_reg != noreg, "supply either a temp or a register offset"); | |
| 4943 } | |
| 4944 | |
| 4945 Label L_fallthrough; | |
| 4946 int label_nulls = 0; | |
| 4947 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
| 4948 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
| 4949 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } | |
| 4950 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
| 4951 | |
| 4952 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
| 4953 int sco_offset = in_bytes(Klass::super_check_offset_offset()); | |
| 4954 Address super_check_offset_addr(super_klass, sco_offset); | |
| 4955 | |
| 4956 // Hacked jcc, which "knows" that L_fallthrough, at least, is in | |
| 4957 // range of a jccb. If this routine grows larger, reconsider at | |
| 4958 // least some of these. | |
| 4959 #define local_jcc(assembler_cond, label) \ | |
| 4960 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \ | |
| 4961 else jcc( assembler_cond, label) /*omit semi*/ | |
| 4962 | |
| 4963 // Hacked jmp, which may only be used just before L_fallthrough. | |
| 4964 #define final_jmp(label) \ | |
| 4965 if (&(label) == &L_fallthrough) { /*do nothing*/ } \ | |
| 4966 else jmp(label) /*omit semi*/ | |
| 4967 | |
| 4968 // If the pointers are equal, we are done (e.g., String[] elements). | |
| 4969 // This self-check enables sharing of secondary supertype arrays among | |
| 4970 // non-primary types such as array-of-interface. Otherwise, each such | |
| 4971 // type would need its own customized SSA. | |
| 4972 // We move this check to the front of the fast path because many | |
| 4973 // type checks are in fact trivially successful in this manner, | |
| 4974 // so we get a nicely predicted branch right at the start of the check. | |
| 4975 cmpptr(sub_klass, super_klass); | |
| 4976 local_jcc(Assembler::equal, *L_success); | |
| 4977 | |
| 4978 // Check the supertype display: | |
| 4979 if (must_load_sco) { | |
| 4980 // Positive movl does right thing on LP64. | |
| 4981 movl(temp_reg, super_check_offset_addr); | |
| 4982 super_check_offset = RegisterOrConstant(temp_reg); | |
| 4983 } | |
| 4984 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0); | |
| 4985 cmpptr(super_klass, super_check_addr); // load displayed supertype | |
| 4986 | |
| 4987 // This check has worked decisively for primary supers. | |
| 4988 // Secondary supers are sought in the super_cache ('super_cache_addr'). | |
| 4989 // (Secondary supers are interfaces and very deeply nested subtypes.) | |
| 4990 // This works in the same check above because of a tricky aliasing | |
| 4991 // between the super_cache and the primary super display elements. | |
| 4992 // (The 'super_check_addr' can address either, as the case requires.) | |
| 4993 // Note that the cache is updated below if it does not help us find | |
| 4994 // what we need immediately. | |
| 4995 // So if it was a primary super, we can just fail immediately. | |
| 4996 // Otherwise, it's the slow path for us (no success at this point). | |
| 4997 | |
| 4998 if (super_check_offset.is_register()) { | |
| 4999 local_jcc(Assembler::equal, *L_success); | |
| 5000 cmpl(super_check_offset.as_register(), sc_offset); | |
| 5001 if (L_failure == &L_fallthrough) { | |
| 5002 local_jcc(Assembler::equal, *L_slow_path); | |
| 5003 } else { | |
| 5004 local_jcc(Assembler::notEqual, *L_failure); | |
| 5005 final_jmp(*L_slow_path); | |
| 5006 } | |
| 5007 } else if (super_check_offset.as_constant() == sc_offset) { | |
| 5008 // Need a slow path; fast failure is impossible. | |
| 5009 if (L_slow_path == &L_fallthrough) { | |
| 5010 local_jcc(Assembler::equal, *L_success); | |
| 5011 } else { | |
| 5012 local_jcc(Assembler::notEqual, *L_slow_path); | |
| 5013 final_jmp(*L_success); | |
| 5014 } | |
| 5015 } else { | |
| 5016 // No slow path; it's a fast decision. | |
| 5017 if (L_failure == &L_fallthrough) { | |
| 5018 local_jcc(Assembler::equal, *L_success); | |
| 5019 } else { | |
| 5020 local_jcc(Assembler::notEqual, *L_failure); | |
| 5021 final_jmp(*L_success); | |
| 5022 } | |
| 5023 } | |
| 5024 | |
| 5025 bind(L_fallthrough); | |
| 5026 | |
| 5027 #undef local_jcc | |
| 5028 #undef final_jmp | |
| 5029 } | |
| 5030 | |
| 5031 | |
| 5032 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, | |
| 5033 Register super_klass, | |
| 5034 Register temp_reg, | |
| 5035 Register temp2_reg, | |
| 5036 Label* L_success, | |
| 5037 Label* L_failure, | |
| 5038 bool set_cond_codes) { | |
| 5039 assert_different_registers(sub_klass, super_klass, temp_reg); | |
| 5040 if (temp2_reg != noreg) | |
| 5041 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg); | |
| 5042 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg) | |
| 5043 | |
| 5044 Label L_fallthrough; | |
| 5045 int label_nulls = 0; | |
| 5046 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
| 5047 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
| 5048 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
| 5049 | |
| 5050 // a couple of useful fields in sub_klass: | |
| 5051 int ss_offset = in_bytes(Klass::secondary_supers_offset()); | |
| 5052 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
| 5053 Address secondary_supers_addr(sub_klass, ss_offset); | |
| 5054 Address super_cache_addr( sub_klass, sc_offset); | |
| 5055 | |
| 5056 // Do a linear scan of the secondary super-klass chain. | |
| 5057 // This code is rarely used, so simplicity is a virtue here. | |
| 5058 // The repne_scan instruction uses fixed registers, which we must spill. | |
| 5059 // Don't worry too much about pre-existing connections with the input regs. | |
| 5060 | |
| 5061 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super) | |
| 5062 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter) | |
| 5063 | |
| 5064 // Get super_klass value into rax (even if it was in rdi or rcx). | |
| 5065 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false; | |
| 5066 if (super_klass != rax || UseCompressedOops) { | |
| 5067 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; } | |
| 5068 mov(rax, super_klass); | |
| 5069 } | |
| 5070 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; } | |
| 5071 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; } | |
| 5072 | |
| 5073 #ifndef PRODUCT | |
| 5074 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; | |
| 5075 ExternalAddress pst_counter_addr((address) pst_counter); | |
| 5076 NOT_LP64( incrementl(pst_counter_addr) ); | |
| 5077 LP64_ONLY( lea(rcx, pst_counter_addr) ); | |
| 5078 LP64_ONLY( incrementl(Address(rcx, 0)) ); | |
| 5079 #endif //PRODUCT | |
| 5080 | |
| 5081 // We will consult the secondary-super array. | |
| 5082 movptr(rdi, secondary_supers_addr); | |
| 5083 // Load the array length. (Positive movl does right thing on LP64.) | |
| 5084 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes())); | |
| 5085 // Skip to start of data. | |
| 5086 addptr(rdi, Array<Klass*>::base_offset_in_bytes()); | |
| 5087 | |
| 5088 // Scan RCX words at [RDI] for an occurrence of RAX. | |
| 5089 // Set NZ/Z based on last compare. | |
| 5090 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does | |
| 5091 // not change flags (only scas instruction which is repeated sets flags). | |
| 5092 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found. | |
| 5093 | |
| 5094 testptr(rax,rax); // Set Z = 0 | |
| 5095 repne_scan(); | |
| 5096 | |
| 5097 // Unspill the temp. registers: | |
| 5098 if (pushed_rdi) pop(rdi); | |
| 5099 if (pushed_rcx) pop(rcx); | |
| 5100 if (pushed_rax) pop(rax); | |
| 5101 | |
| 5102 if (set_cond_codes) { | |
| 5103 // Special hack for the AD files: rdi is guaranteed non-zero. | |
| 5104 assert(!pushed_rdi, "rdi must be left non-NULL"); | |
| 5105 // Also, the condition codes are properly set Z/NZ on succeed/failure. | |
| 5106 } | |
| 5107 | |
| 5108 if (L_failure == &L_fallthrough) | |
| 5109 jccb(Assembler::notEqual, *L_failure); | |
| 5110 else jcc(Assembler::notEqual, *L_failure); | |
| 5111 | |
| 5112 // Success. Cache the super we found and proceed in triumph. | |
| 5113 movptr(super_cache_addr, super_klass); | |
| 5114 | |
| 5115 if (L_success != &L_fallthrough) { | |
| 5116 jmp(*L_success); | |
| 5117 } | |
| 5118 | |
| 5119 #undef IS_A_TEMP | |
| 5120 | |
| 5121 bind(L_fallthrough); | |
| 5122 } | |
| 5123 | |
| 5124 | |
| 5125 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) { | |
| 5126 if (VM_Version::supports_cmov()) { | |
| 5127 cmovl(cc, dst, src); | |
| 5128 } else { | |
| 5129 Label L; | |
| 5130 jccb(negate_condition(cc), L); | |
| 5131 movl(dst, src); | |
| 5132 bind(L); | |
| 5133 } | |
| 5134 } | |
| 5135 | |
| 5136 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) { | |
| 5137 if (VM_Version::supports_cmov()) { | |
| 5138 cmovl(cc, dst, src); | |
| 5139 } else { | |
| 5140 Label L; | |
| 5141 jccb(negate_condition(cc), L); | |
| 5142 movl(dst, src); | |
| 5143 bind(L); | |
| 5144 } | |
| 5145 } | |
| 5146 | |
| 5147 void MacroAssembler::verify_oop(Register reg, const char* s) { | |
| 5148 if (!VerifyOops) return; | |
| 5149 | |
| 5150 // Pass register number to verify_oop_subroutine | |
|
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5151 const char* b = NULL; |
|
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|
5152 { |
|
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5153 ResourceMark rm; |
|
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5154 stringStream ss; |
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5155 ss.print("verify_oop: %s: %s", reg->name(), s); |
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5156 b = code_string(ss.as_string()); |
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5157 } |
| 7199 | 5158 BLOCK_COMMENT("verify_oop {"); |
| 5159 #ifdef _LP64 | |
| 5160 push(rscratch1); // save r10, trashed by movptr() | |
| 5161 #endif | |
| 5162 push(rax); // save rax, | |
| 5163 push(reg); // pass register argument | |
| 5164 ExternalAddress buffer((address) b); | |
| 5165 // avoid using pushptr, as it modifies scratch registers | |
| 5166 // and our contract is not to modify anything | |
| 5167 movptr(rax, buffer.addr()); | |
| 5168 push(rax); | |
| 5169 // call indirectly to solve generation ordering problem | |
| 5170 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); | |
| 5171 call(rax); | |
| 5172 // Caller pops the arguments (oop, message) and restores rax, r10 | |
| 5173 BLOCK_COMMENT("} verify_oop"); | |
| 5174 } | |
| 5175 | |
| 5176 | |
| 5177 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, | |
| 5178 Register tmp, | |
| 5179 int offset) { | |
| 5180 intptr_t value = *delayed_value_addr; | |
| 5181 if (value != 0) | |
| 5182 return RegisterOrConstant(value + offset); | |
| 5183 | |
| 5184 // load indirectly to solve generation ordering problem | |
| 5185 movptr(tmp, ExternalAddress((address) delayed_value_addr)); | |
| 5186 | |
| 5187 #ifdef ASSERT | |
| 5188 { Label L; | |
| 5189 testptr(tmp, tmp); | |
| 5190 if (WizardMode) { | |
|
8767
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5191 const char* buf = NULL; |
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5192 { |
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5193 ResourceMark rm; |
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5194 stringStream ss; |
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5195 ss.print("DelayedValue="INTPTR_FORMAT, delayed_value_addr[1]); |
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5196 buf = code_string(ss.as_string()); |
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5197 } |
| 7199 | 5198 jcc(Assembler::notZero, L); |
| 5199 STOP(buf); | |
| 5200 } else { | |
| 5201 jccb(Assembler::notZero, L); | |
| 5202 hlt(); | |
| 5203 } | |
| 5204 bind(L); | |
| 5205 } | |
| 5206 #endif | |
| 5207 | |
| 5208 if (offset != 0) | |
| 5209 addptr(tmp, offset); | |
| 5210 | |
| 5211 return RegisterOrConstant(tmp); | |
| 5212 } | |
| 5213 | |
| 5214 | |
| 5215 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, | |
| 5216 int extra_slot_offset) { | |
| 5217 // cf. TemplateTable::prepare_invoke(), if (load_receiver). | |
| 5218 int stackElementSize = Interpreter::stackElementSize; | |
| 5219 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0); | |
| 5220 #ifdef ASSERT | |
| 5221 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1); | |
| 5222 assert(offset1 - offset == stackElementSize, "correct arithmetic"); | |
| 5223 #endif | |
| 5224 Register scale_reg = noreg; | |
| 5225 Address::ScaleFactor scale_factor = Address::no_scale; | |
| 5226 if (arg_slot.is_constant()) { | |
| 5227 offset += arg_slot.as_constant() * stackElementSize; | |
| 5228 } else { | |
| 5229 scale_reg = arg_slot.as_register(); | |
| 5230 scale_factor = Address::times(stackElementSize); | |
| 5231 } | |
| 5232 offset += wordSize; // return PC is on stack | |
| 5233 return Address(rsp, scale_reg, scale_factor, offset); | |
| 5234 } | |
| 5235 | |
| 5236 | |
| 5237 void MacroAssembler::verify_oop_addr(Address addr, const char* s) { | |
| 5238 if (!VerifyOops) return; | |
| 5239 | |
| 5240 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord); | |
| 5241 // Pass register number to verify_oop_subroutine | |
|
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5242 const char* b = NULL; |
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5243 { |
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5244 ResourceMark rm; |
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5245 stringStream ss; |
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5246 ss.print("verify_oop_addr: %s", s); |
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5247 b = code_string(ss.as_string()); |
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|
5248 } |
| 7199 | 5249 #ifdef _LP64 |
| 5250 push(rscratch1); // save r10, trashed by movptr() | |
| 5251 #endif | |
| 5252 push(rax); // save rax, | |
| 5253 // addr may contain rsp so we will have to adjust it based on the push | |
| 5254 // we just did (and on 64 bit we do two pushes) | |
| 5255 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which | |
| 5256 // stores rax into addr which is backwards of what was intended. | |
| 5257 if (addr.uses(rsp)) { | |
| 5258 lea(rax, addr); | |
| 5259 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord)); | |
| 5260 } else { | |
| 5261 pushptr(addr); | |
| 5262 } | |
| 5263 | |
| 5264 ExternalAddress buffer((address) b); | |
| 5265 // pass msg argument | |
| 5266 // avoid using pushptr, as it modifies scratch registers | |
| 5267 // and our contract is not to modify anything | |
| 5268 movptr(rax, buffer.addr()); | |
| 5269 push(rax); | |
| 5270 | |
| 5271 // call indirectly to solve generation ordering problem | |
| 5272 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); | |
| 5273 call(rax); | |
| 5274 // Caller pops the arguments (addr, message) and restores rax, r10. | |
| 5275 } | |
| 5276 | |
| 5277 void MacroAssembler::verify_tlab() { | |
| 5278 #ifdef ASSERT | |
| 5279 if (UseTLAB && VerifyOops) { | |
| 5280 Label next, ok; | |
| 5281 Register t1 = rsi; | |
| 5282 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread); | |
| 5283 | |
| 5284 push(t1); | |
| 5285 NOT_LP64(push(thread_reg)); | |
| 5286 NOT_LP64(get_thread(thread_reg)); | |
| 5287 | |
| 5288 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
| 5289 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); | |
| 5290 jcc(Assembler::aboveEqual, next); | |
| 5291 STOP("assert(top >= start)"); | |
| 5292 should_not_reach_here(); | |
| 5293 | |
| 5294 bind(next); | |
| 5295 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); | |
| 5296 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
| 5297 jcc(Assembler::aboveEqual, ok); | |
| 5298 STOP("assert(top <= end)"); | |
| 5299 should_not_reach_here(); | |
| 5300 | |
| 5301 bind(ok); | |
| 5302 NOT_LP64(pop(thread_reg)); | |
| 5303 pop(t1); | |
| 5304 } | |
| 5305 #endif | |
| 5306 } | |
| 5307 | |
| 5308 class ControlWord { | |
| 5309 public: | |
| 5310 int32_t _value; | |
| 5311 | |
| 5312 int rounding_control() const { return (_value >> 10) & 3 ; } | |
| 5313 int precision_control() const { return (_value >> 8) & 3 ; } | |
| 5314 bool precision() const { return ((_value >> 5) & 1) != 0; } | |
| 5315 bool underflow() const { return ((_value >> 4) & 1) != 0; } | |
| 5316 bool overflow() const { return ((_value >> 3) & 1) != 0; } | |
| 5317 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } | |
| 5318 bool denormalized() const { return ((_value >> 1) & 1) != 0; } | |
| 5319 bool invalid() const { return ((_value >> 0) & 1) != 0; } | |
| 5320 | |
| 5321 void print() const { | |
| 5322 // rounding control | |
| 5323 const char* rc; | |
| 5324 switch (rounding_control()) { | |
| 5325 case 0: rc = "round near"; break; | |
| 5326 case 1: rc = "round down"; break; | |
| 5327 case 2: rc = "round up "; break; | |
| 5328 case 3: rc = "chop "; break; | |
| 5329 }; | |
| 5330 // precision control | |
| 5331 const char* pc; | |
| 5332 switch (precision_control()) { | |
| 5333 case 0: pc = "24 bits "; break; | |
| 5334 case 1: pc = "reserved"; break; | |
| 5335 case 2: pc = "53 bits "; break; | |
| 5336 case 3: pc = "64 bits "; break; | |
| 5337 }; | |
| 5338 // flags | |
| 5339 char f[9]; | |
| 5340 f[0] = ' '; | |
| 5341 f[1] = ' '; | |
| 5342 f[2] = (precision ()) ? 'P' : 'p'; | |
| 5343 f[3] = (underflow ()) ? 'U' : 'u'; | |
| 5344 f[4] = (overflow ()) ? 'O' : 'o'; | |
| 5345 f[5] = (zero_divide ()) ? 'Z' : 'z'; | |
| 5346 f[6] = (denormalized()) ? 'D' : 'd'; | |
| 5347 f[7] = (invalid ()) ? 'I' : 'i'; | |
| 5348 f[8] = '\x0'; | |
| 5349 // output | |
| 5350 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc); | |
| 5351 } | |
| 5352 | |
| 5353 }; | |
| 5354 | |
| 5355 class StatusWord { | |
| 5356 public: | |
| 5357 int32_t _value; | |
| 5358 | |
| 5359 bool busy() const { return ((_value >> 15) & 1) != 0; } | |
| 5360 bool C3() const { return ((_value >> 14) & 1) != 0; } | |
| 5361 bool C2() const { return ((_value >> 10) & 1) != 0; } | |
| 5362 bool C1() const { return ((_value >> 9) & 1) != 0; } | |
| 5363 bool C0() const { return ((_value >> 8) & 1) != 0; } | |
| 5364 int top() const { return (_value >> 11) & 7 ; } | |
| 5365 bool error_status() const { return ((_value >> 7) & 1) != 0; } | |
| 5366 bool stack_fault() const { return ((_value >> 6) & 1) != 0; } | |
| 5367 bool precision() const { return ((_value >> 5) & 1) != 0; } | |
| 5368 bool underflow() const { return ((_value >> 4) & 1) != 0; } | |
| 5369 bool overflow() const { return ((_value >> 3) & 1) != 0; } | |
| 5370 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } | |
| 5371 bool denormalized() const { return ((_value >> 1) & 1) != 0; } | |
| 5372 bool invalid() const { return ((_value >> 0) & 1) != 0; } | |
| 5373 | |
| 5374 void print() const { | |
| 5375 // condition codes | |
| 5376 char c[5]; | |
| 5377 c[0] = (C3()) ? '3' : '-'; | |
| 5378 c[1] = (C2()) ? '2' : '-'; | |
| 5379 c[2] = (C1()) ? '1' : '-'; | |
| 5380 c[3] = (C0()) ? '0' : '-'; | |
| 5381 c[4] = '\x0'; | |
| 5382 // flags | |
| 5383 char f[9]; | |
| 5384 f[0] = (error_status()) ? 'E' : '-'; | |
| 5385 f[1] = (stack_fault ()) ? 'S' : '-'; | |
| 5386 f[2] = (precision ()) ? 'P' : '-'; | |
| 5387 f[3] = (underflow ()) ? 'U' : '-'; | |
| 5388 f[4] = (overflow ()) ? 'O' : '-'; | |
| 5389 f[5] = (zero_divide ()) ? 'Z' : '-'; | |
| 5390 f[6] = (denormalized()) ? 'D' : '-'; | |
| 5391 f[7] = (invalid ()) ? 'I' : '-'; | |
| 5392 f[8] = '\x0'; | |
| 5393 // output | |
| 5394 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top()); | |
| 5395 } | |
| 5396 | |
| 5397 }; | |
| 5398 | |
| 5399 class TagWord { | |
| 5400 public: | |
| 5401 int32_t _value; | |
| 5402 | |
| 5403 int tag_at(int i) const { return (_value >> (i*2)) & 3; } | |
| 5404 | |
| 5405 void print() const { | |
| 5406 printf("%04x", _value & 0xFFFF); | |
| 5407 } | |
| 5408 | |
| 5409 }; | |
| 5410 | |
| 5411 class FPU_Register { | |
| 5412 public: | |
| 5413 int32_t _m0; | |
| 5414 int32_t _m1; | |
| 5415 int16_t _ex; | |
| 5416 | |
| 5417 bool is_indefinite() const { | |
| 5418 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0; | |
| 5419 } | |
| 5420 | |
| 5421 void print() const { | |
| 5422 char sign = (_ex < 0) ? '-' : '+'; | |
| 5423 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " "; | |
| 5424 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind); | |
| 5425 }; | |
| 5426 | |
| 5427 }; | |
| 5428 | |
| 5429 class FPU_State { | |
| 5430 public: | |
| 5431 enum { | |
| 5432 register_size = 10, | |
| 5433 number_of_registers = 8, | |
| 5434 register_mask = 7 | |
| 5435 }; | |
| 5436 | |
| 5437 ControlWord _control_word; | |
| 5438 StatusWord _status_word; | |
| 5439 TagWord _tag_word; | |
| 5440 int32_t _error_offset; | |
| 5441 int32_t _error_selector; | |
| 5442 int32_t _data_offset; | |
| 5443 int32_t _data_selector; | |
| 5444 int8_t _register[register_size * number_of_registers]; | |
| 5445 | |
| 5446 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); } | |
| 5447 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; } | |
| 5448 | |
| 5449 const char* tag_as_string(int tag) const { | |
| 5450 switch (tag) { | |
| 5451 case 0: return "valid"; | |
| 5452 case 1: return "zero"; | |
| 5453 case 2: return "special"; | |
| 5454 case 3: return "empty"; | |
| 5455 } | |
| 5456 ShouldNotReachHere(); | |
| 5457 return NULL; | |
| 5458 } | |
| 5459 | |
| 5460 void print() const { | |
| 5461 // print computation registers | |
| 5462 { int t = _status_word.top(); | |
| 5463 for (int i = 0; i < number_of_registers; i++) { | |
| 5464 int j = (i - t) & register_mask; | |
| 5465 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j); | |
| 5466 st(j)->print(); | |
| 5467 printf(" %s\n", tag_as_string(_tag_word.tag_at(i))); | |
| 5468 } | |
| 5469 } | |
| 5470 printf("\n"); | |
| 5471 // print control registers | |
| 5472 printf("ctrl = "); _control_word.print(); printf("\n"); | |
| 5473 printf("stat = "); _status_word .print(); printf("\n"); | |
| 5474 printf("tags = "); _tag_word .print(); printf("\n"); | |
| 5475 } | |
| 5476 | |
| 5477 }; | |
| 5478 | |
| 5479 class Flag_Register { | |
| 5480 public: | |
| 5481 int32_t _value; | |
| 5482 | |
| 5483 bool overflow() const { return ((_value >> 11) & 1) != 0; } | |
| 5484 bool direction() const { return ((_value >> 10) & 1) != 0; } | |
| 5485 bool sign() const { return ((_value >> 7) & 1) != 0; } | |
| 5486 bool zero() const { return ((_value >> 6) & 1) != 0; } | |
| 5487 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; } | |
| 5488 bool parity() const { return ((_value >> 2) & 1) != 0; } | |
| 5489 bool carry() const { return ((_value >> 0) & 1) != 0; } | |
| 5490 | |
| 5491 void print() const { | |
| 5492 // flags | |
| 5493 char f[8]; | |
| 5494 f[0] = (overflow ()) ? 'O' : '-'; | |
| 5495 f[1] = (direction ()) ? 'D' : '-'; | |
| 5496 f[2] = (sign ()) ? 'S' : '-'; | |
| 5497 f[3] = (zero ()) ? 'Z' : '-'; | |
| 5498 f[4] = (auxiliary_carry()) ? 'A' : '-'; | |
| 5499 f[5] = (parity ()) ? 'P' : '-'; | |
| 5500 f[6] = (carry ()) ? 'C' : '-'; | |
| 5501 f[7] = '\x0'; | |
| 5502 // output | |
| 5503 printf("%08x flags = %s", _value, f); | |
| 5504 } | |
| 5505 | |
| 5506 }; | |
| 5507 | |
| 5508 class IU_Register { | |
| 5509 public: | |
| 5510 int32_t _value; | |
| 5511 | |
| 5512 void print() const { | |
| 5513 printf("%08x %11d", _value, _value); | |
| 5514 } | |
| 5515 | |
| 5516 }; | |
| 5517 | |
| 5518 class IU_State { | |
| 5519 public: | |
| 5520 Flag_Register _eflags; | |
| 5521 IU_Register _rdi; | |
| 5522 IU_Register _rsi; | |
| 5523 IU_Register _rbp; | |
| 5524 IU_Register _rsp; | |
| 5525 IU_Register _rbx; | |
| 5526 IU_Register _rdx; | |
| 5527 IU_Register _rcx; | |
| 5528 IU_Register _rax; | |
| 5529 | |
| 5530 void print() const { | |
| 5531 // computation registers | |
| 5532 printf("rax, = "); _rax.print(); printf("\n"); | |
| 5533 printf("rbx, = "); _rbx.print(); printf("\n"); | |
| 5534 printf("rcx = "); _rcx.print(); printf("\n"); | |
| 5535 printf("rdx = "); _rdx.print(); printf("\n"); | |
| 5536 printf("rdi = "); _rdi.print(); printf("\n"); | |
| 5537 printf("rsi = "); _rsi.print(); printf("\n"); | |
| 5538 printf("rbp, = "); _rbp.print(); printf("\n"); | |
| 5539 printf("rsp = "); _rsp.print(); printf("\n"); | |
| 5540 printf("\n"); | |
| 5541 // control registers | |
| 5542 printf("flgs = "); _eflags.print(); printf("\n"); | |
| 5543 } | |
| 5544 }; | |
| 5545 | |
| 5546 | |
| 5547 class CPU_State { | |
| 5548 public: | |
| 5549 FPU_State _fpu_state; | |
| 5550 IU_State _iu_state; | |
| 5551 | |
| 5552 void print() const { | |
| 5553 printf("--------------------------------------------------\n"); | |
| 5554 _iu_state .print(); | |
| 5555 printf("\n"); | |
| 5556 _fpu_state.print(); | |
| 5557 printf("--------------------------------------------------\n"); | |
| 5558 } | |
| 5559 | |
| 5560 }; | |
| 5561 | |
| 5562 | |
| 5563 static void _print_CPU_state(CPU_State* state) { | |
| 5564 state->print(); | |
| 5565 }; | |
| 5566 | |
| 5567 | |
| 5568 void MacroAssembler::print_CPU_state() { | |
| 5569 push_CPU_state(); | |
| 5570 push(rsp); // pass CPU state | |
| 5571 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state))); | |
| 5572 addptr(rsp, wordSize); // discard argument | |
| 5573 pop_CPU_state(); | |
| 5574 } | |
| 5575 | |
| 5576 | |
| 5577 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) { | |
| 5578 static int counter = 0; | |
| 5579 FPU_State* fs = &state->_fpu_state; | |
| 5580 counter++; | |
| 5581 // For leaf calls, only verify that the top few elements remain empty. | |
| 5582 // We only need 1 empty at the top for C2 code. | |
| 5583 if( stack_depth < 0 ) { | |
| 5584 if( fs->tag_for_st(7) != 3 ) { | |
| 5585 printf("FPR7 not empty\n"); | |
| 5586 state->print(); | |
| 5587 assert(false, "error"); | |
| 5588 return false; | |
| 5589 } | |
| 5590 return true; // All other stack states do not matter | |
| 5591 } | |
| 5592 | |
| 5593 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std, | |
| 5594 "bad FPU control word"); | |
| 5595 | |
| 5596 // compute stack depth | |
| 5597 int i = 0; | |
| 5598 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++; | |
| 5599 int d = i; | |
| 5600 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++; | |
| 5601 // verify findings | |
| 5602 if (i != FPU_State::number_of_registers) { | |
| 5603 // stack not contiguous | |
| 5604 printf("%s: stack not contiguous at ST%d\n", s, i); | |
| 5605 state->print(); | |
| 5606 assert(false, "error"); | |
| 5607 return false; | |
| 5608 } | |
| 5609 // check if computed stack depth corresponds to expected stack depth | |
| 5610 if (stack_depth < 0) { | |
| 5611 // expected stack depth is -stack_depth or less | |
| 5612 if (d > -stack_depth) { | |
| 5613 // too many elements on the stack | |
| 5614 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d); | |
| 5615 state->print(); | |
| 5616 assert(false, "error"); | |
| 5617 return false; | |
| 5618 } | |
| 5619 } else { | |
| 5620 // expected stack depth is stack_depth | |
| 5621 if (d != stack_depth) { | |
| 5622 // wrong stack depth | |
| 5623 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d); | |
| 5624 state->print(); | |
| 5625 assert(false, "error"); | |
| 5626 return false; | |
| 5627 } | |
| 5628 } | |
| 5629 // everything is cool | |
| 5630 return true; | |
| 5631 } | |
| 5632 | |
| 5633 | |
| 5634 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { | |
| 5635 if (!VerifyFPU) return; | |
| 5636 push_CPU_state(); | |
| 5637 push(rsp); // pass CPU state | |
| 5638 ExternalAddress msg((address) s); | |
| 5639 // pass message string s | |
| 5640 pushptr(msg.addr()); | |
| 5641 push(stack_depth); // pass stack depth | |
| 5642 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU))); | |
| 5643 addptr(rsp, 3 * wordSize); // discard arguments | |
| 5644 // check for error | |
| 5645 { Label L; | |
| 5646 testl(rax, rax); | |
| 5647 jcc(Assembler::notZero, L); | |
| 5648 int3(); // break if error condition | |
| 5649 bind(L); | |
| 5650 } | |
| 5651 pop_CPU_state(); | |
| 5652 } | |
| 5653 | |
|
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changeset
|
5654 void MacroAssembler::restore_cpu_control_state_after_jni() { |
|
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diff
changeset
|
5655 // Either restore the MXCSR register after returning from the JNI Call |
|
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diff
changeset
|
5656 // or verify that it wasn't changed (with -Xcheck:jni flag). |
|
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diff
changeset
|
5657 if (VM_Version::supports_sse()) { |
|
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diff
changeset
|
5658 if (RestoreMXCSROnJNICalls) { |
|
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diff
changeset
|
5659 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); |
|
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diff
changeset
|
5660 } else if (CheckJNICalls) { |
|
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kvn
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diff
changeset
|
5661 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); |
|
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diff
changeset
|
5662 } |
|
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diff
changeset
|
5663 } |
|
e961c11b85fe
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diff
changeset
|
5664 if (VM_Version::supports_avx()) { |
|
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parents:
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diff
changeset
|
5665 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty. |
|
e961c11b85fe
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parents:
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diff
changeset
|
5666 vzeroupper(); |
|
e961c11b85fe
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parents:
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diff
changeset
|
5667 } |
|
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diff
changeset
|
5668 |
|
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parents:
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diff
changeset
|
5669 #ifndef _LP64 |
|
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parents:
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diff
changeset
|
5670 // Either restore the x87 floating pointer control word after returning |
|
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diff
changeset
|
5671 // from the JNI call or verify that it wasn't changed. |
|
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diff
changeset
|
5672 if (CheckJNICalls) { |
|
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diff
changeset
|
5673 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); |
|
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parents:
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diff
changeset
|
5674 } |
|
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diff
changeset
|
5675 #endif // _LP64 |
|
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parents:
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diff
changeset
|
5676 } |
|
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kvn
parents:
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diff
changeset
|
5677 |
|
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kvn
parents:
8767
diff
changeset
|
5678 |
| 7199 | 5679 void MacroAssembler::load_klass(Register dst, Register src) { |
| 5680 #ifdef _LP64 | |
|
12226
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ehelin
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diff
changeset
|
5681 if (UseCompressedClassPointers) { |
| 7199 | 5682 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); |
| 5683 decode_klass_not_null(dst); | |
| 5684 } else | |
| 5685 #endif | |
| 5686 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); | |
| 5687 } | |
| 5688 | |
| 5689 void MacroAssembler::load_prototype_header(Register dst, Register src) { | |
|
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11080
diff
changeset
|
5690 load_klass(dst, src); |
|
740e263c80c6
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hseigel
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diff
changeset
|
5691 movptr(dst, Address(dst, Klass::prototype_header_offset())); |
| 7199 | 5692 } |
| 5693 | |
| 5694 void MacroAssembler::store_klass(Register dst, Register src) { | |
| 5695 #ifdef _LP64 | |
|
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ehelin
parents:
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diff
changeset
|
5696 if (UseCompressedClassPointers) { |
| 7199 | 5697 encode_klass_not_null(src); |
| 5698 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src); | |
| 5699 } else | |
| 5700 #endif | |
| 5701 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src); | |
| 5702 } | |
| 5703 | |
| 5704 void MacroAssembler::load_heap_oop(Register dst, Address src) { | |
| 5705 #ifdef _LP64 | |
| 5706 // FIXME: Must change all places where we try to load the klass. | |
| 5707 if (UseCompressedOops) { | |
| 5708 movl(dst, src); | |
| 5709 decode_heap_oop(dst); | |
| 5710 } else | |
| 5711 #endif | |
| 5712 movptr(dst, src); | |
| 5713 } | |
| 5714 | |
| 5715 // Doesn't do verfication, generates fixed size code | |
| 5716 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src) { | |
| 5717 #ifdef _LP64 | |
| 5718 if (UseCompressedOops) { | |
| 5719 movl(dst, src); | |
| 5720 decode_heap_oop_not_null(dst); | |
| 5721 } else | |
| 5722 #endif | |
| 5723 movptr(dst, src); | |
| 5724 } | |
| 5725 | |
| 5726 void MacroAssembler::store_heap_oop(Address dst, Register src) { | |
| 5727 #ifdef _LP64 | |
| 5728 if (UseCompressedOops) { | |
| 5729 assert(!dst.uses(src), "not enough registers"); | |
| 5730 encode_heap_oop(src); | |
| 5731 movl(dst, src); | |
| 5732 } else | |
| 5733 #endif | |
| 5734 movptr(dst, src); | |
| 5735 } | |
| 5736 | |
| 5737 void MacroAssembler::cmp_heap_oop(Register src1, Address src2, Register tmp) { | |
| 5738 assert_different_registers(src1, tmp); | |
| 5739 #ifdef _LP64 | |
| 5740 if (UseCompressedOops) { | |
| 5741 bool did_push = false; | |
| 5742 if (tmp == noreg) { | |
| 5743 tmp = rax; | |
| 5744 push(tmp); | |
| 5745 did_push = true; | |
| 5746 assert(!src2.uses(rsp), "can't push"); | |
| 5747 } | |
| 5748 load_heap_oop(tmp, src2); | |
| 5749 cmpptr(src1, tmp); | |
| 5750 if (did_push) pop(tmp); | |
| 5751 } else | |
| 5752 #endif | |
| 5753 cmpptr(src1, src2); | |
| 5754 } | |
| 5755 | |
| 5756 // Used for storing NULLs. | |
| 5757 void MacroAssembler::store_heap_oop_null(Address dst) { | |
| 5758 #ifdef _LP64 | |
| 5759 if (UseCompressedOops) { | |
| 5760 movl(dst, (int32_t)NULL_WORD); | |
| 5761 } else { | |
| 5762 movslq(dst, (int32_t)NULL_WORD); | |
| 5763 } | |
| 5764 #else | |
| 5765 movl(dst, (int32_t)NULL_WORD); | |
| 5766 #endif | |
| 5767 } | |
| 5768 | |
| 5769 #ifdef _LP64 | |
| 5770 void MacroAssembler::store_klass_gap(Register dst, Register src) { | |
|
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12056
diff
changeset
|
5771 if (UseCompressedClassPointers) { |
| 7199 | 5772 // Store to klass gap in destination |
| 5773 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src); | |
| 5774 } | |
| 5775 } | |
| 5776 | |
| 5777 #ifdef ASSERT | |
| 5778 void MacroAssembler::verify_heapbase(const char* msg) { | |
|
12056
740e263c80c6
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hseigel
parents:
11080
diff
changeset
|
5779 assert (UseCompressedOops, "should be compressed"); |
| 7199 | 5780 assert (Universe::heap() != NULL, "java heap should be initialized"); |
| 5781 if (CheckCompressedOops) { | |
| 5782 Label ok; | |
| 5783 push(rscratch1); // cmpptr trashes rscratch1 | |
| 5784 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); | |
| 5785 jcc(Assembler::equal, ok); | |
| 5786 STOP(msg); | |
| 5787 bind(ok); | |
| 5788 pop(rscratch1); | |
| 5789 } | |
| 5790 } | |
| 5791 #endif | |
| 5792 | |
| 5793 // Algorithm must match oop.inline.hpp encode_heap_oop. | |
| 5794 void MacroAssembler::encode_heap_oop(Register r) { | |
| 5795 #ifdef ASSERT | |
| 5796 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?"); | |
| 5797 #endif | |
| 5798 verify_oop(r, "broken oop in encode_heap_oop"); | |
| 5799 if (Universe::narrow_oop_base() == NULL) { | |
| 5800 if (Universe::narrow_oop_shift() != 0) { | |
| 5801 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5802 shrq(r, LogMinObjAlignmentInBytes); | |
| 5803 } | |
| 5804 return; | |
| 5805 } | |
| 5806 testq(r, r); | |
| 5807 cmovq(Assembler::equal, r, r12_heapbase); | |
| 5808 subq(r, r12_heapbase); | |
| 5809 shrq(r, LogMinObjAlignmentInBytes); | |
| 5810 } | |
| 5811 | |
| 5812 void MacroAssembler::encode_heap_oop_not_null(Register r) { | |
| 5813 #ifdef ASSERT | |
| 5814 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?"); | |
| 5815 if (CheckCompressedOops) { | |
| 5816 Label ok; | |
| 5817 testq(r, r); | |
| 5818 jcc(Assembler::notEqual, ok); | |
| 5819 STOP("null oop passed to encode_heap_oop_not_null"); | |
| 5820 bind(ok); | |
| 5821 } | |
| 5822 #endif | |
| 5823 verify_oop(r, "broken oop in encode_heap_oop_not_null"); | |
| 5824 if (Universe::narrow_oop_base() != NULL) { | |
| 5825 subq(r, r12_heapbase); | |
| 5826 } | |
| 5827 if (Universe::narrow_oop_shift() != 0) { | |
| 5828 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5829 shrq(r, LogMinObjAlignmentInBytes); | |
| 5830 } | |
| 5831 } | |
| 5832 | |
| 5833 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) { | |
| 5834 #ifdef ASSERT | |
| 5835 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?"); | |
| 5836 if (CheckCompressedOops) { | |
| 5837 Label ok; | |
| 5838 testq(src, src); | |
| 5839 jcc(Assembler::notEqual, ok); | |
| 5840 STOP("null oop passed to encode_heap_oop_not_null2"); | |
| 5841 bind(ok); | |
| 5842 } | |
| 5843 #endif | |
| 5844 verify_oop(src, "broken oop in encode_heap_oop_not_null2"); | |
| 5845 if (dst != src) { | |
| 5846 movq(dst, src); | |
| 5847 } | |
| 5848 if (Universe::narrow_oop_base() != NULL) { | |
| 5849 subq(dst, r12_heapbase); | |
| 5850 } | |
| 5851 if (Universe::narrow_oop_shift() != 0) { | |
| 5852 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5853 shrq(dst, LogMinObjAlignmentInBytes); | |
| 5854 } | |
| 5855 } | |
| 5856 | |
| 5857 void MacroAssembler::decode_heap_oop(Register r) { | |
| 5858 #ifdef ASSERT | |
| 5859 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?"); | |
| 5860 #endif | |
| 5861 if (Universe::narrow_oop_base() == NULL) { | |
| 5862 if (Universe::narrow_oop_shift() != 0) { | |
| 5863 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5864 shlq(r, LogMinObjAlignmentInBytes); | |
| 5865 } | |
| 5866 } else { | |
| 5867 Label done; | |
| 5868 shlq(r, LogMinObjAlignmentInBytes); | |
| 5869 jccb(Assembler::equal, done); | |
| 5870 addq(r, r12_heapbase); | |
| 5871 bind(done); | |
| 5872 } | |
| 5873 verify_oop(r, "broken oop in decode_heap_oop"); | |
| 5874 } | |
| 5875 | |
| 5876 void MacroAssembler::decode_heap_oop_not_null(Register r) { | |
| 5877 // Note: it will change flags | |
| 5878 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5879 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5880 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
| 5881 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5882 // Also do not verify_oop as this is called by verify_oop. | |
| 5883 if (Universe::narrow_oop_shift() != 0) { | |
| 5884 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5885 shlq(r, LogMinObjAlignmentInBytes); | |
| 5886 if (Universe::narrow_oop_base() != NULL) { | |
| 5887 addq(r, r12_heapbase); | |
| 5888 } | |
| 5889 } else { | |
| 5890 assert (Universe::narrow_oop_base() == NULL, "sanity"); | |
| 5891 } | |
| 5892 } | |
| 5893 | |
| 5894 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) { | |
| 5895 // Note: it will change flags | |
| 5896 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5897 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5898 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
| 5899 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5900 // Also do not verify_oop as this is called by verify_oop. | |
| 5901 if (Universe::narrow_oop_shift() != 0) { | |
| 5902 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5903 if (LogMinObjAlignmentInBytes == Address::times_8) { | |
| 5904 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); | |
| 5905 } else { | |
| 5906 if (dst != src) { | |
| 5907 movq(dst, src); | |
| 5908 } | |
| 5909 shlq(dst, LogMinObjAlignmentInBytes); | |
| 5910 if (Universe::narrow_oop_base() != NULL) { | |
| 5911 addq(dst, r12_heapbase); | |
| 5912 } | |
| 5913 } | |
| 5914 } else { | |
| 5915 assert (Universe::narrow_oop_base() == NULL, "sanity"); | |
| 5916 if (dst != src) { | |
| 5917 movq(dst, src); | |
| 5918 } | |
| 5919 } | |
| 5920 } | |
| 5921 | |
| 5922 void MacroAssembler::encode_klass_not_null(Register r) { | |
|
13000
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5923 if (Universe::narrow_klass_base() != NULL) { |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5924 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5925 assert(r != r12_heapbase, "Encoding a klass in r12"); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5926 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5927 subq(r, r12_heapbase); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5928 } |
| 7199 | 5929 if (Universe::narrow_klass_shift() != 0) { |
| 5930 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 5931 shrq(r, LogKlassAlignmentInBytes); | |
| 5932 } | |
|
13000
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
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12835
diff
changeset
|
5933 if (Universe::narrow_klass_base() != NULL) { |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5934 reinit_heapbase(); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5935 } |
| 7199 | 5936 } |
| 5937 | |
| 5938 void MacroAssembler::encode_klass_not_null(Register dst, Register src) { | |
|
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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11080
diff
changeset
|
5939 if (dst == src) { |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11080
diff
changeset
|
5940 encode_klass_not_null(src); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11080
diff
changeset
|
5941 } else { |
|
13000
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
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12835
diff
changeset
|
5942 if (Universe::narrow_klass_base() != NULL) { |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5943 mov64(dst, (int64_t)Universe::narrow_klass_base()); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5944 negq(dst); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5945 addq(dst, src); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5946 } else { |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5947 movptr(dst, src); |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12835
diff
changeset
|
5948 } |
|
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11080
diff
changeset
|
5949 if (Universe::narrow_klass_shift() != 0) { |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11080
diff
changeset
|
5950 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11080
diff
changeset
|
5951 shrq(dst, LogKlassAlignmentInBytes); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11080
diff
changeset
|
5952 } |
|
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11080
diff
changeset
|
5953 } |
|
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diff
changeset
|
5954 } |
|
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11080
diff
changeset
|
5955 |
|
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diff
changeset
|
5956 // Function instr_size_for_decode_klass_not_null() counts the instructions |
|
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diff
changeset
|
5957 // generated by decode_klass_not_null(register r) and reinit_heapbase(), |
|
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diff
changeset
|
5958 // when (Universe::heap() != NULL). Hence, if the instructions they |
|
740e263c80c6
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diff
changeset
|
5959 // generate change, then this method needs to be updated. |
|
740e263c80c6
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diff
changeset
|
5960 int MacroAssembler::instr_size_for_decode_klass_not_null() { |
|
12226
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diff
changeset
|
5961 assert (UseCompressedClassPointers, "only for compressed klass ptrs"); |
|
13000
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
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diff
changeset
|
5962 if (Universe::narrow_klass_base() != NULL) { |
|
209aa13ab8c0
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diff
changeset
|
5963 // mov64 + addq + shlq? + mov64 (for reinit_heapbase()). |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
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diff
changeset
|
5964 return (Universe::narrow_klass_shift() == 0 ? 20 : 24); |
|
209aa13ab8c0
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coleenp
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diff
changeset
|
5965 } else { |
|
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
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diff
changeset
|
5966 // longest load decode klass function, mov64, leaq |
|
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8024927: Nashorn performance regression with CompressedOops
coleenp
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diff
changeset
|
5967 return 16; |
|
209aa13ab8c0
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diff
changeset
|
5968 } |
|
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11080
diff
changeset
|
5969 } |
|
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diff
changeset
|
5970 |
|
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diff
changeset
|
5971 // !!! If the instructions that get generated here change then function |
|
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diff
changeset
|
5972 // instr_size_for_decode_klass_not_null() needs to get updated. |
| 7199 | 5973 void MacroAssembler::decode_klass_not_null(Register r) { |
| 5974 // Note: it will change flags | |
|
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diff
changeset
|
5975 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
|
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diff
changeset
|
5976 assert(r != r12_heapbase, "Decoding a klass in r12"); |
| 7199 | 5977 // Cannot assert, unverified entry point counts instructions (see .ad file) |
| 5978 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5979 // Also do not verify_oop as this is called by verify_oop. | |
| 5980 if (Universe::narrow_klass_shift() != 0) { | |
| 5981 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 5982 shlq(r, LogKlassAlignmentInBytes); | |
|
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diff
changeset
|
5983 } |
|
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diff
changeset
|
5984 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. |
|
13000
209aa13ab8c0
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diff
changeset
|
5985 if (Universe::narrow_klass_base() != NULL) { |
|
209aa13ab8c0
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diff
changeset
|
5986 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); |
|
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8024927: Nashorn performance regression with CompressedOops
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diff
changeset
|
5987 addq(r, r12_heapbase); |
|
209aa13ab8c0
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coleenp
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diff
changeset
|
5988 reinit_heapbase(); |
|
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diff
changeset
|
5989 } |
| 7199 | 5990 } |
| 5991 | |
| 5992 void MacroAssembler::decode_klass_not_null(Register dst, Register src) { | |
| 5993 // Note: it will change flags | |
|
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diff
changeset
|
5994 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
|
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diff
changeset
|
5995 if (dst == src) { |
|
740e263c80c6
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diff
changeset
|
5996 decode_klass_not_null(dst); |
| 7199 | 5997 } else { |
|
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diff
changeset
|
5998 // Cannot assert, unverified entry point counts instructions (see .ad file) |
|
740e263c80c6
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diff
changeset
|
5999 // vtableStubs also counts instructions in pd_code_size_limit. |
|
740e263c80c6
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diff
changeset
|
6000 // Also do not verify_oop as this is called by verify_oop. |
|
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diff
changeset
|
6001 mov64(dst, (int64_t)Universe::narrow_klass_base()); |
|
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diff
changeset
|
6002 if (Universe::narrow_klass_shift() != 0) { |
|
740e263c80c6
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hseigel
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diff
changeset
|
6003 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); |
|
740e263c80c6
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diff
changeset
|
6004 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?"); |
|
740e263c80c6
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diff
changeset
|
6005 leaq(dst, Address(dst, src, Address::times_8, 0)); |
|
740e263c80c6
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hseigel
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diff
changeset
|
6006 } else { |
|
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diff
changeset
|
6007 addq(dst, src); |
| 7199 | 6008 } |
| 6009 } | |
| 6010 } | |
| 6011 | |
| 6012 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) { | |
| 6013 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 6014 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 6015 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 6016 int oop_index = oop_recorder()->find_index(obj); | |
| 6017 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 6018 mov_narrow_oop(dst, oop_index, rspec); | |
| 6019 } | |
| 6020 | |
| 6021 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) { | |
| 6022 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 6023 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 6024 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 6025 int oop_index = oop_recorder()->find_index(obj); | |
| 6026 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 6027 mov_narrow_oop(dst, oop_index, rspec); | |
| 6028 } | |
| 6029 | |
| 6030 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) { | |
|
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12056
diff
changeset
|
6031 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
| 7199 | 6032 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
| 6033 int klass_index = oop_recorder()->find_index(k); | |
| 6034 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
|
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hseigel
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diff
changeset
|
6035 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); |
| 7199 | 6036 } |
| 6037 | |
| 6038 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) { | |
|
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diff
changeset
|
6039 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
| 7199 | 6040 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
| 6041 int klass_index = oop_recorder()->find_index(k); | |
| 6042 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
|
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diff
changeset
|
6043 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); |
| 7199 | 6044 } |
| 6045 | |
| 6046 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) { | |
| 6047 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 6048 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 6049 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 6050 int oop_index = oop_recorder()->find_index(obj); | |
| 6051 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 6052 Assembler::cmp_narrow_oop(dst, oop_index, rspec); | |
| 6053 } | |
| 6054 | |
| 6055 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) { | |
| 6056 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 6057 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 6058 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 6059 int oop_index = oop_recorder()->find_index(obj); | |
| 6060 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 6061 Assembler::cmp_narrow_oop(dst, oop_index, rspec); | |
| 6062 } | |
| 6063 | |
| 6064 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) { | |
|
12226
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diff
changeset
|
6065 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
| 7199 | 6066 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
| 6067 int klass_index = oop_recorder()->find_index(k); | |
| 6068 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
|
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hseigel
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diff
changeset
|
6069 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); |
| 7199 | 6070 } |
| 6071 | |
| 6072 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) { | |
|
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12056
diff
changeset
|
6073 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
| 7199 | 6074 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
| 6075 int klass_index = oop_recorder()->find_index(k); | |
| 6076 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
|
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hseigel
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11080
diff
changeset
|
6077 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); |
| 7199 | 6078 } |
| 6079 | |
| 6080 void MacroAssembler::reinit_heapbase() { | |
|
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diff
changeset
|
6081 if (UseCompressedOops || UseCompressedClassPointers) { |
|
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11080
diff
changeset
|
6082 if (Universe::heap() != NULL) { |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11080
diff
changeset
|
6083 if (Universe::narrow_oop_base() == NULL) { |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11080
diff
changeset
|
6084 MacroAssembler::xorptr(r12_heapbase, r12_heapbase); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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diff
changeset
|
6085 } else { |
|
740e263c80c6
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diff
changeset
|
6086 mov64(r12_heapbase, (int64_t)Universe::narrow_ptrs_base()); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
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diff
changeset
|
6087 } |
|
740e263c80c6
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11080
diff
changeset
|
6088 } else { |
|
740e263c80c6
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hseigel
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11080
diff
changeset
|
6089 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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diff
changeset
|
6090 } |
|
740e263c80c6
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diff
changeset
|
6091 } |
|
740e263c80c6
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diff
changeset
|
6092 } |
|
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diff
changeset
|
6093 |
| 7199 | 6094 #endif // _LP64 |
| 6095 | |
| 6096 | |
| 6097 // C2 compiled method's prolog code. | |
| 6098 void MacroAssembler::verified_entry(int framesize, bool stack_bang, bool fp_mode_24b) { | |
| 6099 | |
| 6100 // WARNING: Initial instruction MUST be 5 bytes or longer so that | |
| 6101 // NativeJump::patch_verified_entry will be able to patch out the entry | |
| 6102 // code safely. The push to verify stack depth is ok at 5 bytes, | |
| 6103 // the frame allocation can be either 3 or 6 bytes. So if we don't do | |
| 6104 // stack bang then we must use the 6 byte frame allocation even if | |
| 6105 // we have no frame. :-( | |
| 6106 | |
| 6107 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned"); | |
| 6108 // Remove word for return addr | |
| 6109 framesize -= wordSize; | |
| 6110 | |
| 6111 // Calls to C2R adapters often do not accept exceptional returns. | |
| 6112 // We require that their callers must bang for them. But be careful, because | |
| 6113 // some VM calls (such as call site linkage) can use several kilobytes of | |
| 6114 // stack. But the stack safety zone should account for that. | |
| 6115 // See bugs 4446381, 4468289, 4497237. | |
| 6116 if (stack_bang) { | |
| 6117 generate_stack_overflow_check(framesize); | |
| 6118 | |
| 6119 // We always push rbp, so that on return to interpreter rbp, will be | |
| 6120 // restored correctly and we can correct the stack. | |
| 6121 push(rbp); | |
| 6122 // Remove word for ebp | |
| 6123 framesize -= wordSize; | |
| 6124 | |
| 6125 // Create frame | |
| 6126 if (framesize) { | |
| 6127 subptr(rsp, framesize); | |
| 6128 } | |
| 6129 } else { | |
| 6130 // Create frame (force generation of a 4 byte immediate value) | |
| 6131 subptr_imm32(rsp, framesize); | |
| 6132 | |
| 6133 // Save RBP register now. | |
| 6134 framesize -= wordSize; | |
| 6135 movptr(Address(rsp, framesize), rbp); | |
| 6136 } | |
| 6137 | |
| 6138 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth | |
| 6139 framesize -= wordSize; | |
| 6140 movptr(Address(rsp, framesize), (int32_t)0xbadb100d); | |
| 6141 } | |
| 6142 | |
| 6143 #ifndef _LP64 | |
| 6144 // If method sets FPU control word do it now | |
| 6145 if (fp_mode_24b) { | |
| 6146 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); | |
| 6147 } | |
| 6148 if (UseSSE >= 2 && VerifyFPU) { | |
| 6149 verify_FPU(0, "FPU stack must be clean on entry"); | |
| 6150 } | |
| 6151 #endif | |
| 6152 | |
| 6153 #ifdef ASSERT | |
| 6154 if (VerifyStackAtCalls) { | |
| 6155 Label L; | |
| 6156 push(rax); | |
| 6157 mov(rax, rsp); | |
| 6158 andptr(rax, StackAlignmentInBytes-1); | |
| 6159 cmpptr(rax, StackAlignmentInBytes-wordSize); | |
| 6160 pop(rax); | |
| 6161 jcc(Assembler::equal, L); | |
| 6162 STOP("Stack is not properly aligned!"); | |
| 6163 bind(L); | |
| 6164 } | |
| 6165 #endif | |
| 6166 | |
| 6167 } | |
| 6168 | |
|
7474
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changeset
|
6169 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp) { |
|
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|
6170 // cnt - number of qwords (8-byte words). |
|
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|
6171 // base - start address, qword aligned. |
|
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diff
changeset
|
6172 assert(base==rdi, "base register must be edi for rep stos"); |
|
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changeset
|
6173 assert(tmp==rax, "tmp register must be eax for rep stos"); |
|
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changeset
|
6174 assert(cnt==rcx, "cnt register must be ecx for rep stos"); |
|
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|
6175 |
|
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changeset
|
6176 xorptr(tmp, tmp); |
|
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|
6177 if (UseFastStosb) { |
|
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diff
changeset
|
6178 shlptr(cnt,3); // convert to number of bytes |
|
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diff
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|
6179 rep_stosb(); |
|
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diff
changeset
|
6180 } else { |
|
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changeset
|
6181 NOT_LP64(shlptr(cnt,1);) // convert to number of dwords for 32-bit VM |
|
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|
6182 rep_stos(); |
|
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|
6183 } |
|
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|
6184 } |
| 7199 | 6185 |
| 6186 // IndexOf for constant substrings with size >= 8 chars | |
| 6187 // which don't need to be loaded through stack. | |
| 6188 void MacroAssembler::string_indexofC8(Register str1, Register str2, | |
| 6189 Register cnt1, Register cnt2, | |
| 6190 int int_cnt2, Register result, | |
| 6191 XMMRegister vec, Register tmp) { | |
| 6192 ShortBranchVerifier sbv(this); | |
| 6193 assert(UseSSE42Intrinsics, "SSE4.2 is required"); | |
| 6194 | |
| 6195 // This method uses pcmpestri inxtruction with bound registers | |
| 6196 // inputs: | |
| 6197 // xmm - substring | |
| 6198 // rax - substring length (elements count) | |
| 6199 // mem - scanned string | |
| 6200 // rdx - string length (elements count) | |
| 6201 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) | |
| 6202 // outputs: | |
| 6203 // rcx - matched index in string | |
| 6204 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
| 6205 | |
| 6206 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, | |
| 6207 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR, | |
| 6208 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE; | |
| 6209 | |
| 6210 // Note, inline_string_indexOf() generates checks: | |
| 6211 // if (substr.count > string.count) return -1; | |
| 6212 // if (substr.count == 0) return 0; | |
| 6213 assert(int_cnt2 >= 8, "this code isused only for cnt2 >= 8 chars"); | |
| 6214 | |
| 6215 // Load substring. | |
| 6216 movdqu(vec, Address(str2, 0)); | |
| 6217 movl(cnt2, int_cnt2); | |
| 6218 movptr(result, str1); // string addr | |
| 6219 | |
| 6220 if (int_cnt2 > 8) { | |
| 6221 jmpb(SCAN_TO_SUBSTR); | |
| 6222 | |
| 6223 // Reload substr for rescan, this code | |
| 6224 // is executed only for large substrings (> 8 chars) | |
| 6225 bind(RELOAD_SUBSTR); | |
| 6226 movdqu(vec, Address(str2, 0)); | |
| 6227 negptr(cnt2); // Jumped here with negative cnt2, convert to positive | |
| 6228 | |
| 6229 bind(RELOAD_STR); | |
| 6230 // We came here after the beginning of the substring was | |
| 6231 // matched but the rest of it was not so we need to search | |
| 6232 // again. Start from the next element after the previous match. | |
| 6233 | |
| 6234 // cnt2 is number of substring reminding elements and | |
| 6235 // cnt1 is number of string reminding elements when cmp failed. | |
| 6236 // Restored cnt1 = cnt1 - cnt2 + int_cnt2 | |
| 6237 subl(cnt1, cnt2); | |
| 6238 addl(cnt1, int_cnt2); | |
| 6239 movl(cnt2, int_cnt2); // Now restore cnt2 | |
| 6240 | |
| 6241 decrementl(cnt1); // Shift to next element | |
| 6242 cmpl(cnt1, cnt2); | |
| 6243 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 6244 | |
| 6245 addptr(result, 2); | |
| 6246 | |
| 6247 } // (int_cnt2 > 8) | |
| 6248 | |
| 6249 // Scan string for start of substr in 16-byte vectors | |
| 6250 bind(SCAN_TO_SUBSTR); | |
| 6251 pcmpestri(vec, Address(result, 0), 0x0d); | |
| 6252 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 | |
| 6253 subl(cnt1, 8); | |
| 6254 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string | |
| 6255 cmpl(cnt1, cnt2); | |
| 6256 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 6257 addptr(result, 16); | |
| 6258 jmpb(SCAN_TO_SUBSTR); | |
| 6259 | |
| 6260 // Found a potential substr | |
| 6261 bind(FOUND_CANDIDATE); | |
| 6262 // Matched whole vector if first element matched (tmp(rcx) == 0). | |
| 6263 if (int_cnt2 == 8) { | |
| 6264 jccb(Assembler::overflow, RET_FOUND); // OF == 1 | |
| 6265 } else { // int_cnt2 > 8 | |
| 6266 jccb(Assembler::overflow, FOUND_SUBSTR); | |
| 6267 } | |
| 6268 // After pcmpestri tmp(rcx) contains matched element index | |
| 6269 // Compute start addr of substr | |
| 6270 lea(result, Address(result, tmp, Address::times_2)); | |
| 6271 | |
| 6272 // Make sure string is still long enough | |
| 6273 subl(cnt1, tmp); | |
| 6274 cmpl(cnt1, cnt2); | |
| 6275 if (int_cnt2 == 8) { | |
| 6276 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); | |
| 6277 } else { // int_cnt2 > 8 | |
| 6278 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD); | |
| 6279 } | |
| 6280 // Left less then substring. | |
| 6281 | |
| 6282 bind(RET_NOT_FOUND); | |
| 6283 movl(result, -1); | |
| 6284 jmpb(EXIT); | |
| 6285 | |
| 6286 if (int_cnt2 > 8) { | |
| 6287 // This code is optimized for the case when whole substring | |
| 6288 // is matched if its head is matched. | |
| 6289 bind(MATCH_SUBSTR_HEAD); | |
| 6290 pcmpestri(vec, Address(result, 0), 0x0d); | |
| 6291 // Reload only string if does not match | |
| 6292 jccb(Assembler::noOverflow, RELOAD_STR); // OF == 0 | |
| 6293 | |
| 6294 Label CONT_SCAN_SUBSTR; | |
| 6295 // Compare the rest of substring (> 8 chars). | |
| 6296 bind(FOUND_SUBSTR); | |
| 6297 // First 8 chars are already matched. | |
| 6298 negptr(cnt2); | |
| 6299 addptr(cnt2, 8); | |
| 6300 | |
| 6301 bind(SCAN_SUBSTR); | |
| 6302 subl(cnt1, 8); | |
| 6303 cmpl(cnt2, -8); // Do not read beyond substring | |
| 6304 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR); | |
| 6305 // Back-up strings to avoid reading beyond substring: | |
| 6306 // cnt1 = cnt1 - cnt2 + 8 | |
| 6307 addl(cnt1, cnt2); // cnt2 is negative | |
| 6308 addl(cnt1, 8); | |
| 6309 movl(cnt2, 8); negptr(cnt2); | |
| 6310 bind(CONT_SCAN_SUBSTR); | |
| 6311 if (int_cnt2 < (int)G) { | |
| 6312 movdqu(vec, Address(str2, cnt2, Address::times_2, int_cnt2*2)); | |
| 6313 pcmpestri(vec, Address(result, cnt2, Address::times_2, int_cnt2*2), 0x0d); | |
| 6314 } else { | |
| 6315 // calculate index in register to avoid integer overflow (int_cnt2*2) | |
| 6316 movl(tmp, int_cnt2); | |
| 6317 addptr(tmp, cnt2); | |
| 6318 movdqu(vec, Address(str2, tmp, Address::times_2, 0)); | |
| 6319 pcmpestri(vec, Address(result, tmp, Address::times_2, 0), 0x0d); | |
| 6320 } | |
| 6321 // Need to reload strings pointers if not matched whole vector | |
| 6322 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 | |
| 6323 addptr(cnt2, 8); | |
| 6324 jcc(Assembler::negative, SCAN_SUBSTR); | |
| 6325 // Fall through if found full substring | |
| 6326 | |
| 6327 } // (int_cnt2 > 8) | |
| 6328 | |
| 6329 bind(RET_FOUND); | |
| 6330 // Found result if we matched full small substring. | |
| 6331 // Compute substr offset | |
| 6332 subptr(result, str1); | |
| 6333 shrl(result, 1); // index | |
| 6334 bind(EXIT); | |
| 6335 | |
| 6336 } // string_indexofC8 | |
| 6337 | |
| 6338 // Small strings are loaded through stack if they cross page boundary. | |
| 6339 void MacroAssembler::string_indexof(Register str1, Register str2, | |
| 6340 Register cnt1, Register cnt2, | |
| 6341 int int_cnt2, Register result, | |
| 6342 XMMRegister vec, Register tmp) { | |
| 6343 ShortBranchVerifier sbv(this); | |
| 6344 assert(UseSSE42Intrinsics, "SSE4.2 is required"); | |
| 6345 // | |
| 6346 // int_cnt2 is length of small (< 8 chars) constant substring | |
| 6347 // or (-1) for non constant substring in which case its length | |
| 6348 // is in cnt2 register. | |
| 6349 // | |
| 6350 // Note, inline_string_indexOf() generates checks: | |
| 6351 // if (substr.count > string.count) return -1; | |
| 6352 // if (substr.count == 0) return 0; | |
| 6353 // | |
| 6354 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < 8), "should be != 0"); | |
| 6355 | |
| 6356 // This method uses pcmpestri inxtruction with bound registers | |
| 6357 // inputs: | |
| 6358 // xmm - substring | |
| 6359 // rax - substring length (elements count) | |
| 6360 // mem - scanned string | |
| 6361 // rdx - string length (elements count) | |
| 6362 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) | |
| 6363 // outputs: | |
| 6364 // rcx - matched index in string | |
| 6365 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
| 6366 | |
| 6367 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR, | |
| 6368 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR, | |
| 6369 FOUND_CANDIDATE; | |
| 6370 | |
| 6371 { //======================================================== | |
| 6372 // We don't know where these strings are located | |
| 6373 // and we can't read beyond them. Load them through stack. | |
| 6374 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR; | |
| 6375 | |
| 6376 movptr(tmp, rsp); // save old SP | |
| 6377 | |
| 6378 if (int_cnt2 > 0) { // small (< 8 chars) constant substring | |
| 6379 if (int_cnt2 == 1) { // One char | |
| 6380 load_unsigned_short(result, Address(str2, 0)); | |
| 6381 movdl(vec, result); // move 32 bits | |
| 6382 } else if (int_cnt2 == 2) { // Two chars | |
| 6383 movdl(vec, Address(str2, 0)); // move 32 bits | |
| 6384 } else if (int_cnt2 == 4) { // Four chars | |
| 6385 movq(vec, Address(str2, 0)); // move 64 bits | |
| 6386 } else { // cnt2 = { 3, 5, 6, 7 } | |
| 6387 // Array header size is 12 bytes in 32-bit VM | |
| 6388 // + 6 bytes for 3 chars == 18 bytes, | |
| 6389 // enough space to load vec and shift. | |
| 6390 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity"); | |
| 6391 movdqu(vec, Address(str2, (int_cnt2*2)-16)); | |
| 6392 psrldq(vec, 16-(int_cnt2*2)); | |
| 6393 } | |
| 6394 } else { // not constant substring | |
| 6395 cmpl(cnt2, 8); | |
| 6396 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough | |
| 6397 | |
| 6398 // We can read beyond string if srt+16 does not cross page boundary | |
| 6399 // since heaps are aligned and mapped by pages. | |
| 6400 assert(os::vm_page_size() < (int)G, "default page should be small"); | |
| 6401 movl(result, str2); // We need only low 32 bits | |
| 6402 andl(result, (os::vm_page_size()-1)); | |
| 6403 cmpl(result, (os::vm_page_size()-16)); | |
| 6404 jccb(Assembler::belowEqual, CHECK_STR); | |
| 6405 | |
| 6406 // Move small strings to stack to allow load 16 bytes into vec. | |
| 6407 subptr(rsp, 16); | |
| 6408 int stk_offset = wordSize-2; | |
| 6409 push(cnt2); | |
| 6410 | |
| 6411 bind(COPY_SUBSTR); | |
| 6412 load_unsigned_short(result, Address(str2, cnt2, Address::times_2, -2)); | |
| 6413 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result); | |
| 6414 decrement(cnt2); | |
| 6415 jccb(Assembler::notZero, COPY_SUBSTR); | |
| 6416 | |
| 6417 pop(cnt2); | |
| 6418 movptr(str2, rsp); // New substring address | |
| 6419 } // non constant | |
| 6420 | |
| 6421 bind(CHECK_STR); | |
| 6422 cmpl(cnt1, 8); | |
| 6423 jccb(Assembler::aboveEqual, BIG_STRINGS); | |
| 6424 | |
| 6425 // Check cross page boundary. | |
| 6426 movl(result, str1); // We need only low 32 bits | |
| 6427 andl(result, (os::vm_page_size()-1)); | |
| 6428 cmpl(result, (os::vm_page_size()-16)); | |
| 6429 jccb(Assembler::belowEqual, BIG_STRINGS); | |
| 6430 | |
| 6431 subptr(rsp, 16); | |
| 6432 int stk_offset = -2; | |
| 6433 if (int_cnt2 < 0) { // not constant | |
| 6434 push(cnt2); | |
| 6435 stk_offset += wordSize; | |
| 6436 } | |
| 6437 movl(cnt2, cnt1); | |
| 6438 | |
| 6439 bind(COPY_STR); | |
| 6440 load_unsigned_short(result, Address(str1, cnt2, Address::times_2, -2)); | |
| 6441 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result); | |
| 6442 decrement(cnt2); | |
| 6443 jccb(Assembler::notZero, COPY_STR); | |
| 6444 | |
| 6445 if (int_cnt2 < 0) { // not constant | |
| 6446 pop(cnt2); | |
| 6447 } | |
| 6448 movptr(str1, rsp); // New string address | |
| 6449 | |
| 6450 bind(BIG_STRINGS); | |
| 6451 // Load substring. | |
| 6452 if (int_cnt2 < 0) { // -1 | |
| 6453 movdqu(vec, Address(str2, 0)); | |
| 6454 push(cnt2); // substr count | |
| 6455 push(str2); // substr addr | |
| 6456 push(str1); // string addr | |
| 6457 } else { | |
| 6458 // Small (< 8 chars) constant substrings are loaded already. | |
| 6459 movl(cnt2, int_cnt2); | |
| 6460 } | |
| 6461 push(tmp); // original SP | |
| 6462 | |
| 6463 } // Finished loading | |
| 6464 | |
| 6465 //======================================================== | |
| 6466 // Start search | |
| 6467 // | |
| 6468 | |
| 6469 movptr(result, str1); // string addr | |
| 6470 | |
| 6471 if (int_cnt2 < 0) { // Only for non constant substring | |
| 6472 jmpb(SCAN_TO_SUBSTR); | |
| 6473 | |
| 6474 // SP saved at sp+0 | |
| 6475 // String saved at sp+1*wordSize | |
| 6476 // Substr saved at sp+2*wordSize | |
| 6477 // Substr count saved at sp+3*wordSize | |
| 6478 | |
| 6479 // Reload substr for rescan, this code | |
| 6480 // is executed only for large substrings (> 8 chars) | |
| 6481 bind(RELOAD_SUBSTR); | |
| 6482 movptr(str2, Address(rsp, 2*wordSize)); | |
| 6483 movl(cnt2, Address(rsp, 3*wordSize)); | |
| 6484 movdqu(vec, Address(str2, 0)); | |
| 6485 // We came here after the beginning of the substring was | |
| 6486 // matched but the rest of it was not so we need to search | |
| 6487 // again. Start from the next element after the previous match. | |
| 6488 subptr(str1, result); // Restore counter | |
| 6489 shrl(str1, 1); | |
| 6490 addl(cnt1, str1); | |
| 6491 decrementl(cnt1); // Shift to next element | |
| 6492 cmpl(cnt1, cnt2); | |
| 6493 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 6494 | |
| 6495 addptr(result, 2); | |
| 6496 } // non constant | |
| 6497 | |
| 6498 // Scan string for start of substr in 16-byte vectors | |
| 6499 bind(SCAN_TO_SUBSTR); | |
| 6500 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
| 6501 pcmpestri(vec, Address(result, 0), 0x0d); | |
| 6502 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 | |
| 6503 subl(cnt1, 8); | |
| 6504 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string | |
| 6505 cmpl(cnt1, cnt2); | |
| 6506 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 6507 addptr(result, 16); | |
| 6508 | |
| 6509 bind(ADJUST_STR); | |
| 6510 cmpl(cnt1, 8); // Do not read beyond string | |
| 6511 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); | |
| 6512 // Back-up string to avoid reading beyond string. | |
| 6513 lea(result, Address(result, cnt1, Address::times_2, -16)); | |
| 6514 movl(cnt1, 8); | |
| 6515 jmpb(SCAN_TO_SUBSTR); | |
| 6516 | |
| 6517 // Found a potential substr | |
| 6518 bind(FOUND_CANDIDATE); | |
| 6519 // After pcmpestri tmp(rcx) contains matched element index | |
| 6520 | |
| 6521 // Make sure string is still long enough | |
| 6522 subl(cnt1, tmp); | |
| 6523 cmpl(cnt1, cnt2); | |
| 6524 jccb(Assembler::greaterEqual, FOUND_SUBSTR); | |
| 6525 // Left less then substring. | |
| 6526 | |
| 6527 bind(RET_NOT_FOUND); | |
| 6528 movl(result, -1); | |
| 6529 jmpb(CLEANUP); | |
| 6530 | |
| 6531 bind(FOUND_SUBSTR); | |
| 6532 // Compute start addr of substr | |
| 6533 lea(result, Address(result, tmp, Address::times_2)); | |
| 6534 | |
| 6535 if (int_cnt2 > 0) { // Constant substring | |
| 6536 // Repeat search for small substring (< 8 chars) | |
| 6537 // from new point without reloading substring. | |
| 6538 // Have to check that we don't read beyond string. | |
| 6539 cmpl(tmp, 8-int_cnt2); | |
| 6540 jccb(Assembler::greater, ADJUST_STR); | |
| 6541 // Fall through if matched whole substring. | |
| 6542 } else { // non constant | |
| 6543 assert(int_cnt2 == -1, "should be != 0"); | |
| 6544 | |
| 6545 addl(tmp, cnt2); | |
| 6546 // Found result if we matched whole substring. | |
| 6547 cmpl(tmp, 8); | |
| 6548 jccb(Assembler::lessEqual, RET_FOUND); | |
| 6549 | |
| 6550 // Repeat search for small substring (<= 8 chars) | |
| 6551 // from new point 'str1' without reloading substring. | |
| 6552 cmpl(cnt2, 8); | |
| 6553 // Have to check that we don't read beyond string. | |
| 6554 jccb(Assembler::lessEqual, ADJUST_STR); | |
| 6555 | |
| 6556 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG; | |
| 6557 // Compare the rest of substring (> 8 chars). | |
| 6558 movptr(str1, result); | |
| 6559 | |
| 6560 cmpl(tmp, cnt2); | |
| 6561 // First 8 chars are already matched. | |
| 6562 jccb(Assembler::equal, CHECK_NEXT); | |
| 6563 | |
| 6564 bind(SCAN_SUBSTR); | |
| 6565 pcmpestri(vec, Address(str1, 0), 0x0d); | |
| 6566 // Need to reload strings pointers if not matched whole vector | |
| 6567 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 | |
| 6568 | |
| 6569 bind(CHECK_NEXT); | |
| 6570 subl(cnt2, 8); | |
| 6571 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring | |
| 6572 addptr(str1, 16); | |
| 6573 addptr(str2, 16); | |
| 6574 subl(cnt1, 8); | |
| 6575 cmpl(cnt2, 8); // Do not read beyond substring | |
| 6576 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR); | |
| 6577 // Back-up strings to avoid reading beyond substring. | |
| 6578 lea(str2, Address(str2, cnt2, Address::times_2, -16)); | |
| 6579 lea(str1, Address(str1, cnt2, Address::times_2, -16)); | |
| 6580 subl(cnt1, cnt2); | |
| 6581 movl(cnt2, 8); | |
| 6582 addl(cnt1, 8); | |
| 6583 bind(CONT_SCAN_SUBSTR); | |
| 6584 movdqu(vec, Address(str2, 0)); | |
| 6585 jmpb(SCAN_SUBSTR); | |
| 6586 | |
| 6587 bind(RET_FOUND_LONG); | |
| 6588 movptr(str1, Address(rsp, wordSize)); | |
| 6589 } // non constant | |
| 6590 | |
| 6591 bind(RET_FOUND); | |
| 6592 // Compute substr offset | |
| 6593 subptr(result, str1); | |
| 6594 shrl(result, 1); // index | |
| 6595 | |
| 6596 bind(CLEANUP); | |
| 6597 pop(rsp); // restore SP | |
| 6598 | |
| 6599 } // string_indexof | |
| 6600 | |
| 6601 // Compare strings. | |
| 6602 void MacroAssembler::string_compare(Register str1, Register str2, | |
| 6603 Register cnt1, Register cnt2, Register result, | |
| 6604 XMMRegister vec1) { | |
| 6605 ShortBranchVerifier sbv(this); | |
| 6606 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL; | |
| 6607 | |
| 6608 // Compute the minimum of the string lengths and the | |
| 6609 // difference of the string lengths (stack). | |
| 6610 // Do the conditional move stuff | |
| 6611 movl(result, cnt1); | |
| 6612 subl(cnt1, cnt2); | |
| 6613 push(cnt1); | |
| 6614 cmov32(Assembler::lessEqual, cnt2, result); | |
| 6615 | |
| 6616 // Is the minimum length zero? | |
| 6617 testl(cnt2, cnt2); | |
| 6618 jcc(Assembler::zero, LENGTH_DIFF_LABEL); | |
| 6619 | |
|
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6620 // Compare first characters |
| 7199 | 6621 load_unsigned_short(result, Address(str1, 0)); |
| 6622 load_unsigned_short(cnt1, Address(str2, 0)); | |
| 6623 subl(result, cnt1); | |
| 6624 jcc(Assembler::notZero, POP_LABEL); | |
|
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6625 cmpl(cnt2, 1); |
|
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|
6626 jcc(Assembler::equal, LENGTH_DIFF_LABEL); |
|
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|
6627 |
|
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|
6628 // Check if the strings start at the same location. |
|
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diff
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|
6629 cmpptr(str1, str2); |
|
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changeset
|
6630 jcc(Assembler::equal, LENGTH_DIFF_LABEL); |
| 7199 | 6631 |
| 6632 Address::ScaleFactor scale = Address::times_2; | |
| 6633 int stride = 8; | |
| 6634 | |
|
8042
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|
6635 if (UseAVX >= 2 && UseSSE42Intrinsics) { |
|
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|
6636 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR; |
|
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|
6637 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR; |
|
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|
6638 Label COMPARE_TAIL_LONG; |
|
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|
6639 int pcmpmask = 0x19; |
|
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|
6640 |
|
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|
6641 // Setup to compare 16-chars (32-bytes) vectors, |
|
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changeset
|
6642 // start from first character again because it has aligned address. |
|
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|
6643 int stride2 = 16; |
|
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|
6644 int adr_stride = stride << scale; |
|
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|
6645 int adr_stride2 = stride2 << scale; |
|
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|
6646 |
|
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|
6647 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); |
|
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|
6648 // rax and rdx are used by pcmpestri as elements counters |
|
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|
6649 movl(result, cnt2); |
|
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|
6650 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count |
|
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|
6651 jcc(Assembler::zero, COMPARE_TAIL_LONG); |
|
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|
6652 |
|
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changeset
|
6653 // fast path : compare first 2 8-char vectors. |
|
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|
6654 bind(COMPARE_16_CHARS); |
|
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|
6655 movdqu(vec1, Address(str1, 0)); |
|
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|
6656 pcmpestri(vec1, Address(str2, 0), pcmpmask); |
|
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|
6657 jccb(Assembler::below, COMPARE_INDEX_CHAR); |
|
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|
6658 |
|
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|
6659 movdqu(vec1, Address(str1, adr_stride)); |
|
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|
6660 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask); |
|
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|
6661 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS); |
|
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|
6662 addl(cnt1, stride); |
|
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changeset
|
6663 |
|
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diff
changeset
|
6664 // Compare the characters at index in cnt1 |
|
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|
6665 bind(COMPARE_INDEX_CHAR); //cnt1 has the offset of the mismatching character |
|
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|
6666 load_unsigned_short(result, Address(str1, cnt1, scale)); |
|
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|
6667 load_unsigned_short(cnt2, Address(str2, cnt1, scale)); |
|
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|
6668 subl(result, cnt2); |
|
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|
6669 jmp(POP_LABEL); |
|
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|
6670 |
|
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changeset
|
6671 // Setup the registers to start vector comparison loop |
|
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|
6672 bind(COMPARE_WIDE_VECTORS); |
|
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|
6673 lea(str1, Address(str1, result, scale)); |
|
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|
6674 lea(str2, Address(str2, result, scale)); |
|
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|
6675 subl(result, stride2); |
|
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|
6676 subl(cnt2, stride2); |
|
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|
6677 jccb(Assembler::zero, COMPARE_WIDE_TAIL); |
|
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|
6678 negptr(result); |
|
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|
6679 |
|
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diff
changeset
|
6680 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest) |
|
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|
6681 bind(COMPARE_WIDE_VECTORS_LOOP); |
|
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|
6682 vmovdqu(vec1, Address(str1, result, scale)); |
|
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|
6683 vpxor(vec1, Address(str2, result, scale)); |
|
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|
6684 vptest(vec1, vec1); |
|
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|
6685 jccb(Assembler::notZero, VECTOR_NOT_EQUAL); |
|
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|
6686 addptr(result, stride2); |
|
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|
6687 subl(cnt2, stride2); |
|
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changeset
|
6688 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP); |
|
8873
e961c11b85fe
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8767
diff
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|
6689 // clean upper bits of YMM registers |
|
e961c11b85fe
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|
6690 vzeroupper(); |
|
7477
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changeset
|
6691 |
|
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diff
changeset
|
6692 // compare wide vectors tail |
|
038dd2875b94
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changeset
|
6693 bind(COMPARE_WIDE_TAIL); |
|
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diff
changeset
|
6694 testptr(result, result); |
|
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diff
changeset
|
6695 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
|
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diff
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|
6696 |
|
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diff
changeset
|
6697 movl(result, stride2); |
|
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changeset
|
6698 movl(cnt2, result); |
|
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|
6699 negptr(result); |
|
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|
6700 jmpb(COMPARE_WIDE_VECTORS_LOOP); |
|
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|
6701 |
|
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diff
changeset
|
6702 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors. |
|
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|
6703 bind(VECTOR_NOT_EQUAL); |
|
8873
e961c11b85fe
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|
6704 // clean upper bits of YMM registers |
|
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|
6705 vzeroupper(); |
|
7477
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|
6706 lea(str1, Address(str1, result, scale)); |
|
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|
6707 lea(str2, Address(str2, result, scale)); |
|
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|
6708 jmp(COMPARE_16_CHARS); |
|
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diff
changeset
|
6709 |
|
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changeset
|
6710 // Compare tail chars, length between 1 to 15 chars |
|
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changeset
|
6711 bind(COMPARE_TAIL_LONG); |
|
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diff
changeset
|
6712 movl(cnt2, result); |
|
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changeset
|
6713 cmpl(cnt2, stride); |
|
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changeset
|
6714 jccb(Assembler::less, COMPARE_SMALL_STR); |
|
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|
6715 |
|
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changeset
|
6716 movdqu(vec1, Address(str1, 0)); |
|
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changeset
|
6717 pcmpestri(vec1, Address(str2, 0), pcmpmask); |
|
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changeset
|
6718 jcc(Assembler::below, COMPARE_INDEX_CHAR); |
|
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changeset
|
6719 subptr(cnt2, stride); |
|
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|
6720 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
|
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|
6721 lea(str1, Address(str1, result, scale)); |
|
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|
6722 lea(str2, Address(str2, result, scale)); |
|
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|
6723 negptr(cnt2); |
|
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|
6724 jmpb(WHILE_HEAD_LABEL); |
|
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|
6725 |
|
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changeset
|
6726 bind(COMPARE_SMALL_STR); |
|
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changeset
|
6727 } else if (UseSSE42Intrinsics) { |
| 7199 | 6728 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL; |
| 6729 int pcmpmask = 0x19; | |
|
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changeset
|
6730 // Setup to compare 8-char (16-byte) vectors, |
|
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changeset
|
6731 // start from first character again because it has aligned address. |
| 7199 | 6732 movl(result, cnt2); |
| 6733 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count | |
| 6734 jccb(Assembler::zero, COMPARE_TAIL); | |
| 6735 | |
| 6736 lea(str1, Address(str1, result, scale)); | |
| 6737 lea(str2, Address(str2, result, scale)); | |
| 6738 negptr(result); | |
| 6739 | |
| 6740 // pcmpestri | |
| 6741 // inputs: | |
| 6742 // vec1- substring | |
| 6743 // rax - negative string length (elements count) | |
| 6744 // mem - scaned string | |
| 6745 // rdx - string length (elements count) | |
| 6746 // pcmpmask - cmp mode: 11000 (string compare with negated result) | |
| 6747 // + 00 (unsigned bytes) or + 01 (unsigned shorts) | |
| 6748 // outputs: | |
| 6749 // rcx - first mismatched element index | |
| 6750 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); | |
| 6751 | |
| 6752 bind(COMPARE_WIDE_VECTORS); | |
| 6753 movdqu(vec1, Address(str1, result, scale)); | |
| 6754 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); | |
| 6755 // After pcmpestri cnt1(rcx) contains mismatched element index | |
| 6756 | |
| 6757 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1 | |
| 6758 addptr(result, stride); | |
| 6759 subptr(cnt2, stride); | |
| 6760 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS); | |
| 6761 | |
| 6762 // compare wide vectors tail | |
|
7477
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changeset
|
6763 testptr(result, result); |
| 7199 | 6764 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
| 6765 | |
| 6766 movl(cnt2, stride); | |
| 6767 movl(result, stride); | |
| 6768 negptr(result); | |
| 6769 movdqu(vec1, Address(str1, result, scale)); | |
| 6770 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); | |
| 6771 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL); | |
| 6772 | |
| 6773 // Mismatched characters in the vectors | |
| 6774 bind(VECTOR_NOT_EQUAL); | |
|
7477
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changeset
|
6775 addptr(cnt1, result); |
|
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changeset
|
6776 load_unsigned_short(result, Address(str1, cnt1, scale)); |
|
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changeset
|
6777 load_unsigned_short(cnt2, Address(str2, cnt1, scale)); |
|
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changeset
|
6778 subl(result, cnt2); |
| 7199 | 6779 jmpb(POP_LABEL); |
| 6780 | |
| 6781 bind(COMPARE_TAIL); // limit is zero | |
| 6782 movl(cnt2, result); | |
| 6783 // Fallthru to tail compare | |
| 6784 } | |
| 6785 // Shift str2 and str1 to the end of the arrays, negate min | |
|
7477
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changeset
|
6786 lea(str1, Address(str1, cnt2, scale)); |
|
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changeset
|
6787 lea(str2, Address(str2, cnt2, scale)); |
|
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changeset
|
6788 decrementl(cnt2); // first character was compared already |
| 7199 | 6789 negptr(cnt2); |
| 6790 | |
| 6791 // Compare the rest of the elements | |
| 6792 bind(WHILE_HEAD_LABEL); | |
| 6793 load_unsigned_short(result, Address(str1, cnt2, scale, 0)); | |
| 6794 load_unsigned_short(cnt1, Address(str2, cnt2, scale, 0)); | |
| 6795 subl(result, cnt1); | |
| 6796 jccb(Assembler::notZero, POP_LABEL); | |
| 6797 increment(cnt2); | |
| 6798 jccb(Assembler::notZero, WHILE_HEAD_LABEL); | |
| 6799 | |
| 6800 // Strings are equal up to min length. Return the length difference. | |
| 6801 bind(LENGTH_DIFF_LABEL); | |
| 6802 pop(result); | |
| 6803 jmpb(DONE_LABEL); | |
| 6804 | |
| 6805 // Discard the stored length difference | |
| 6806 bind(POP_LABEL); | |
| 6807 pop(cnt1); | |
| 6808 | |
| 6809 // That's it | |
| 6810 bind(DONE_LABEL); | |
| 6811 } | |
| 6812 | |
| 6813 // Compare char[] arrays aligned to 4 bytes or substrings. | |
| 6814 void MacroAssembler::char_arrays_equals(bool is_array_equ, Register ary1, Register ary2, | |
| 6815 Register limit, Register result, Register chr, | |
| 6816 XMMRegister vec1, XMMRegister vec2) { | |
| 6817 ShortBranchVerifier sbv(this); | |
| 6818 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR; | |
| 6819 | |
| 6820 int length_offset = arrayOopDesc::length_offset_in_bytes(); | |
| 6821 int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR); | |
| 6822 | |
| 6823 // Check the input args | |
| 6824 cmpptr(ary1, ary2); | |
| 6825 jcc(Assembler::equal, TRUE_LABEL); | |
| 6826 | |
| 6827 if (is_array_equ) { | |
| 6828 // Need additional checks for arrays_equals. | |
| 6829 testptr(ary1, ary1); | |
| 6830 jcc(Assembler::zero, FALSE_LABEL); | |
| 6831 testptr(ary2, ary2); | |
| 6832 jcc(Assembler::zero, FALSE_LABEL); | |
| 6833 | |
| 6834 // Check the lengths | |
| 6835 movl(limit, Address(ary1, length_offset)); | |
| 6836 cmpl(limit, Address(ary2, length_offset)); | |
| 6837 jcc(Assembler::notEqual, FALSE_LABEL); | |
| 6838 } | |
| 6839 | |
| 6840 // count == 0 | |
| 6841 testl(limit, limit); | |
| 6842 jcc(Assembler::zero, TRUE_LABEL); | |
| 6843 | |
| 6844 if (is_array_equ) { | |
| 6845 // Load array address | |
| 6846 lea(ary1, Address(ary1, base_offset)); | |
| 6847 lea(ary2, Address(ary2, base_offset)); | |
| 6848 } | |
| 6849 | |
| 6850 shll(limit, 1); // byte count != 0 | |
| 6851 movl(result, limit); // copy | |
| 6852 | |
|
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|
6853 if (UseAVX >= 2) { |
|
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|
6854 // With AVX2, use 32-byte vector compare |
|
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|
6855 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; |
|
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|
6856 |
|
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|
6857 // Compare 32-byte vectors |
|
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|
6858 andl(result, 0x0000001e); // tail count (in bytes) |
|
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|
6859 andl(limit, 0xffffffe0); // vector count (in bytes) |
|
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|
6860 jccb(Assembler::zero, COMPARE_TAIL); |
|
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|
6861 |
|
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|
6862 lea(ary1, Address(ary1, limit, Address::times_1)); |
|
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|
6863 lea(ary2, Address(ary2, limit, Address::times_1)); |
|
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|
6864 negptr(limit); |
|
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|
6865 |
|
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|
6866 bind(COMPARE_WIDE_VECTORS); |
|
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|
6867 vmovdqu(vec1, Address(ary1, limit, Address::times_1)); |
|
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|
6868 vmovdqu(vec2, Address(ary2, limit, Address::times_1)); |
|
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|
6869 vpxor(vec1, vec2); |
|
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|
6870 |
|
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|
6871 vptest(vec1, vec1); |
|
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|
6872 jccb(Assembler::notZero, FALSE_LABEL); |
|
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|
6873 addptr(limit, 32); |
|
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|
6874 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); |
|
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|
6875 |
|
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|
6876 testl(result, result); |
|
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|
6877 jccb(Assembler::zero, TRUE_LABEL); |
|
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|
6878 |
|
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|
6879 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); |
|
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|
6880 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32)); |
|
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|
6881 vpxor(vec1, vec2); |
|
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|
6882 |
|
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|
6883 vptest(vec1, vec1); |
|
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|
6884 jccb(Assembler::notZero, FALSE_LABEL); |
|
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|
6885 jmpb(TRUE_LABEL); |
|
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|
6886 |
|
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|
6887 bind(COMPARE_TAIL); // limit is zero |
|
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|
6888 movl(limit, result); |
|
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changeset
|
6889 // Fallthru to tail compare |
|
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|
6890 } else if (UseSSE42Intrinsics) { |
| 7199 | 6891 // With SSE4.2, use double quad vector compare |
| 6892 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; | |
| 6893 | |
| 6894 // Compare 16-byte vectors | |
| 6895 andl(result, 0x0000000e); // tail count (in bytes) | |
| 6896 andl(limit, 0xfffffff0); // vector count (in bytes) | |
| 6897 jccb(Assembler::zero, COMPARE_TAIL); | |
| 6898 | |
| 6899 lea(ary1, Address(ary1, limit, Address::times_1)); | |
| 6900 lea(ary2, Address(ary2, limit, Address::times_1)); | |
| 6901 negptr(limit); | |
| 6902 | |
| 6903 bind(COMPARE_WIDE_VECTORS); | |
| 6904 movdqu(vec1, Address(ary1, limit, Address::times_1)); | |
| 6905 movdqu(vec2, Address(ary2, limit, Address::times_1)); | |
| 6906 pxor(vec1, vec2); | |
| 6907 | |
| 6908 ptest(vec1, vec1); | |
| 6909 jccb(Assembler::notZero, FALSE_LABEL); | |
| 6910 addptr(limit, 16); | |
| 6911 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); | |
| 6912 | |
| 6913 testl(result, result); | |
| 6914 jccb(Assembler::zero, TRUE_LABEL); | |
| 6915 | |
| 6916 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); | |
| 6917 movdqu(vec2, Address(ary2, result, Address::times_1, -16)); | |
| 6918 pxor(vec1, vec2); | |
| 6919 | |
| 6920 ptest(vec1, vec1); | |
| 6921 jccb(Assembler::notZero, FALSE_LABEL); | |
| 6922 jmpb(TRUE_LABEL); | |
| 6923 | |
| 6924 bind(COMPARE_TAIL); // limit is zero | |
| 6925 movl(limit, result); | |
| 6926 // Fallthru to tail compare | |
| 6927 } | |
| 6928 | |
| 6929 // Compare 4-byte vectors | |
| 6930 andl(limit, 0xfffffffc); // vector count (in bytes) | |
| 6931 jccb(Assembler::zero, COMPARE_CHAR); | |
| 6932 | |
| 6933 lea(ary1, Address(ary1, limit, Address::times_1)); | |
| 6934 lea(ary2, Address(ary2, limit, Address::times_1)); | |
| 6935 negptr(limit); | |
| 6936 | |
| 6937 bind(COMPARE_VECTORS); | |
| 6938 movl(chr, Address(ary1, limit, Address::times_1)); | |
| 6939 cmpl(chr, Address(ary2, limit, Address::times_1)); | |
| 6940 jccb(Assembler::notEqual, FALSE_LABEL); | |
| 6941 addptr(limit, 4); | |
| 6942 jcc(Assembler::notZero, COMPARE_VECTORS); | |
| 6943 | |
| 6944 // Compare trailing char (final 2 bytes), if any | |
| 6945 bind(COMPARE_CHAR); | |
| 6946 testl(result, 0x2); // tail char | |
| 6947 jccb(Assembler::zero, TRUE_LABEL); | |
| 6948 load_unsigned_short(chr, Address(ary1, 0)); | |
| 6949 load_unsigned_short(limit, Address(ary2, 0)); | |
| 6950 cmpl(chr, limit); | |
| 6951 jccb(Assembler::notEqual, FALSE_LABEL); | |
| 6952 | |
| 6953 bind(TRUE_LABEL); | |
| 6954 movl(result, 1); // return true | |
| 6955 jmpb(DONE); | |
| 6956 | |
| 6957 bind(FALSE_LABEL); | |
| 6958 xorl(result, result); // return false | |
| 6959 | |
| 6960 // That's it | |
| 6961 bind(DONE); | |
|
8873
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diff
changeset
|
6962 if (UseAVX >= 2) { |
|
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parents:
8767
diff
changeset
|
6963 // clean upper bits of YMM registers |
|
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8767
diff
changeset
|
6964 vzeroupper(); |
|
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|
6965 } |
| 7199 | 6966 } |
| 6967 | |
| 6968 void MacroAssembler::generate_fill(BasicType t, bool aligned, | |
| 6969 Register to, Register value, Register count, | |
| 6970 Register rtmp, XMMRegister xtmp) { | |
| 6971 ShortBranchVerifier sbv(this); | |
| 6972 assert_different_registers(to, value, count, rtmp); | |
| 6973 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
| 6974 Label L_fill_2_bytes, L_fill_4_bytes; | |
| 6975 | |
| 6976 int shift = -1; | |
| 6977 switch (t) { | |
| 6978 case T_BYTE: | |
| 6979 shift = 2; | |
| 6980 break; | |
| 6981 case T_SHORT: | |
| 6982 shift = 1; | |
| 6983 break; | |
| 6984 case T_INT: | |
| 6985 shift = 0; | |
| 6986 break; | |
| 6987 default: ShouldNotReachHere(); | |
| 6988 } | |
| 6989 | |
| 6990 if (t == T_BYTE) { | |
| 6991 andl(value, 0xff); | |
| 6992 movl(rtmp, value); | |
| 6993 shll(rtmp, 8); | |
| 6994 orl(value, rtmp); | |
| 6995 } | |
| 6996 if (t == T_SHORT) { | |
| 6997 andl(value, 0xffff); | |
| 6998 } | |
| 6999 if (t == T_BYTE || t == T_SHORT) { | |
| 7000 movl(rtmp, value); | |
| 7001 shll(rtmp, 16); | |
| 7002 orl(value, rtmp); | |
| 7003 } | |
| 7004 | |
| 7005 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
| 7006 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp | |
| 7007 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { | |
| 7008 // align source address at 4 bytes address boundary | |
| 7009 if (t == T_BYTE) { | |
| 7010 // One byte misalignment happens only for byte arrays | |
| 7011 testptr(to, 1); | |
| 7012 jccb(Assembler::zero, L_skip_align1); | |
| 7013 movb(Address(to, 0), value); | |
| 7014 increment(to); | |
| 7015 decrement(count); | |
| 7016 BIND(L_skip_align1); | |
| 7017 } | |
| 7018 // Two bytes misalignment happens only for byte and short (char) arrays | |
| 7019 testptr(to, 2); | |
| 7020 jccb(Assembler::zero, L_skip_align2); | |
| 7021 movw(Address(to, 0), value); | |
| 7022 addptr(to, 2); | |
| 7023 subl(count, 1<<(shift-1)); | |
| 7024 BIND(L_skip_align2); | |
| 7025 } | |
| 7026 if (UseSSE < 2) { | |
| 7027 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; | |
| 7028 // Fill 32-byte chunks | |
| 7029 subl(count, 8 << shift); | |
| 7030 jcc(Assembler::less, L_check_fill_8_bytes); | |
| 7031 align(16); | |
| 7032 | |
| 7033 BIND(L_fill_32_bytes_loop); | |
| 7034 | |
| 7035 for (int i = 0; i < 32; i += 4) { | |
| 7036 movl(Address(to, i), value); | |
| 7037 } | |
| 7038 | |
| 7039 addptr(to, 32); | |
| 7040 subl(count, 8 << shift); | |
| 7041 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); | |
| 7042 BIND(L_check_fill_8_bytes); | |
| 7043 addl(count, 8 << shift); | |
| 7044 jccb(Assembler::zero, L_exit); | |
| 7045 jmpb(L_fill_8_bytes); | |
| 7046 | |
| 7047 // | |
| 7048 // length is too short, just fill qwords | |
| 7049 // | |
| 7050 BIND(L_fill_8_bytes_loop); | |
| 7051 movl(Address(to, 0), value); | |
| 7052 movl(Address(to, 4), value); | |
| 7053 addptr(to, 8); | |
| 7054 BIND(L_fill_8_bytes); | |
| 7055 subl(count, 1 << (shift + 1)); | |
| 7056 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); | |
| 7057 // fall through to fill 4 bytes | |
| 7058 } else { | |
| 7059 Label L_fill_32_bytes; | |
| 7060 if (!UseUnalignedLoadStores) { | |
| 7061 // align to 8 bytes, we know we are 4 byte aligned to start | |
| 7062 testptr(to, 4); | |
| 7063 jccb(Assembler::zero, L_fill_32_bytes); | |
| 7064 movl(Address(to, 0), value); | |
| 7065 addptr(to, 4); | |
| 7066 subl(count, 1<<shift); | |
| 7067 } | |
| 7068 BIND(L_fill_32_bytes); | |
| 7069 { | |
| 7070 assert( UseSSE >= 2, "supported cpu only" ); | |
| 7071 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; | |
| 7072 movdl(xtmp, value); | |
|
7475
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|
7073 if (UseAVX >= 2 && UseUnalignedLoadStores) { |
|
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|
7074 // Fill 64-byte chunks |
|
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|
7075 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; |
|
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|
7076 vpbroadcastd(xtmp, xtmp); |
|
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|
7077 |
|
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|
7078 subl(count, 16 << shift); |
|
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|
7079 jcc(Assembler::less, L_check_fill_32_bytes); |
|
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|
7080 align(16); |
|
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|
7081 |
|
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|
7082 BIND(L_fill_64_bytes_loop); |
|
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|
7083 vmovdqu(Address(to, 0), xtmp); |
|
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|
7084 vmovdqu(Address(to, 32), xtmp); |
|
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changeset
|
7085 addptr(to, 64); |
|
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diff
changeset
|
7086 subl(count, 16 << shift); |
|
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changeset
|
7087 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); |
|
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|
7088 |
|
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changeset
|
7089 BIND(L_check_fill_32_bytes); |
|
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changeset
|
7090 addl(count, 8 << shift); |
|
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diff
changeset
|
7091 jccb(Assembler::less, L_check_fill_8_bytes); |
|
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kvn
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diff
changeset
|
7092 vmovdqu(Address(to, 0), xtmp); |
|
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parents:
7474
diff
changeset
|
7093 addptr(to, 32); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7094 subl(count, 8 << shift); |
|
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7095 |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7096 BIND(L_check_fill_8_bytes); |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7097 // clean upper bits of YMM registers |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7098 vzeroupper(); |
| 7199 | 7099 } else { |
|
7475
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7100 // Fill 32-byte chunks |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7101 pshufd(xtmp, xtmp, 0); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7102 |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7103 subl(count, 8 << shift); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7104 jcc(Assembler::less, L_check_fill_8_bytes); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7105 align(16); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7106 |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7107 BIND(L_fill_32_bytes_loop); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7108 |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7109 if (UseUnalignedLoadStores) { |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7110 movdqu(Address(to, 0), xtmp); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7111 movdqu(Address(to, 16), xtmp); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7112 } else { |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7113 movq(Address(to, 0), xtmp); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7114 movq(Address(to, 8), xtmp); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7115 movq(Address(to, 16), xtmp); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7116 movq(Address(to, 24), xtmp); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7117 } |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7118 |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7119 addptr(to, 32); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7120 subl(count, 8 << shift); |
|
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
7121 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); |
|
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7122 |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7123 BIND(L_check_fill_8_bytes); |
| 7199 | 7124 } |
| 7125 addl(count, 8 << shift); | |
| 7126 jccb(Assembler::zero, L_exit); | |
| 7127 jmpb(L_fill_8_bytes); | |
| 7128 | |
| 7129 // | |
| 7130 // length is too short, just fill qwords | |
| 7131 // | |
| 7132 BIND(L_fill_8_bytes_loop); | |
| 7133 movq(Address(to, 0), xtmp); | |
| 7134 addptr(to, 8); | |
| 7135 BIND(L_fill_8_bytes); | |
| 7136 subl(count, 1 << (shift + 1)); | |
| 7137 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); | |
| 7138 } | |
| 7139 } | |
| 7140 // fill trailing 4 bytes | |
| 7141 BIND(L_fill_4_bytes); | |
| 7142 testl(count, 1<<shift); | |
| 7143 jccb(Assembler::zero, L_fill_2_bytes); | |
| 7144 movl(Address(to, 0), value); | |
| 7145 if (t == T_BYTE || t == T_SHORT) { | |
| 7146 addptr(to, 4); | |
| 7147 BIND(L_fill_2_bytes); | |
| 7148 // fill trailing 2 bytes | |
| 7149 testl(count, 1<<(shift-1)); | |
| 7150 jccb(Assembler::zero, L_fill_byte); | |
| 7151 movw(Address(to, 0), value); | |
| 7152 if (t == T_BYTE) { | |
| 7153 addptr(to, 2); | |
| 7154 BIND(L_fill_byte); | |
| 7155 // fill trailing byte | |
| 7156 testl(count, 1); | |
| 7157 jccb(Assembler::zero, L_exit); | |
| 7158 movb(Address(to, 0), value); | |
| 7159 } else { | |
| 7160 BIND(L_fill_byte); | |
| 7161 } | |
| 7162 } else { | |
| 7163 BIND(L_fill_2_bytes); | |
| 7164 } | |
| 7165 BIND(L_exit); | |
| 7166 } | |
|
7637
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7167 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7168 // encode char[] to byte[] in ISO_8859_1 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7169 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len, |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7170 XMMRegister tmp1Reg, XMMRegister tmp2Reg, |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7171 XMMRegister tmp3Reg, XMMRegister tmp4Reg, |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7172 Register tmp5, Register result) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7173 // rsi: src |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7174 // rdi: dst |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7175 // rdx: len |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7176 // rcx: tmp5 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7177 // rax: result |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7178 ShortBranchVerifier sbv(this); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7179 assert_different_registers(src, dst, len, tmp5, result); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7180 Label L_done, L_copy_1_char, L_copy_1_char_exit; |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7181 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7182 // set result |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7183 xorl(result, result); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7184 // check for zero length |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7185 testl(len, len); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7186 jcc(Assembler::zero, L_done); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7187 movl(result, len); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7188 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7189 // Setup pointers |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7190 lea(src, Address(src, len, Address::times_2)); // char[] |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7191 lea(dst, Address(dst, len, Address::times_1)); // byte[] |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7192 negptr(len); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7193 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7194 if (UseSSE42Intrinsics || UseAVX >= 2) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7195 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit; |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7196 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit; |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7197 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7198 if (UseAVX >= 2) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7199 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit; |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7200 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7201 movdl(tmp1Reg, tmp5); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7202 vpbroadcastd(tmp1Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7203 jmpb(L_chars_32_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7204 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7205 bind(L_copy_32_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7206 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7207 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7208 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7209 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7210 jccb(Assembler::notZero, L_copy_32_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7211 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7212 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7213 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7214 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7215 bind(L_chars_32_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7216 addptr(len, 32); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7217 jccb(Assembler::lessEqual, L_copy_32_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7218 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7219 bind(L_copy_32_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7220 subptr(len, 16); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7221 jccb(Assembler::greater, L_copy_16_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7222 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7223 } else if (UseSSE42Intrinsics) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7224 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7225 movdl(tmp1Reg, tmp5); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7226 pshufd(tmp1Reg, tmp1Reg, 0); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7227 jmpb(L_chars_16_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7228 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7229 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7230 bind(L_copy_16_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7231 if (UseAVX >= 2) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7232 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7233 vptest(tmp2Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7234 jccb(Assembler::notZero, L_copy_16_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7235 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7236 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7237 } else { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7238 if (UseAVX > 0) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7239 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7240 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7241 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector256 */ false); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7242 } else { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7243 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7244 por(tmp2Reg, tmp3Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7245 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7246 por(tmp2Reg, tmp4Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7247 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7248 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7249 jccb(Assembler::notZero, L_copy_16_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7250 packuswb(tmp3Reg, tmp4Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7251 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7252 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7253 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7254 bind(L_chars_16_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7255 addptr(len, 16); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7256 jccb(Assembler::lessEqual, L_copy_16_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7257 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7258 bind(L_copy_16_chars_exit); |
|
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7259 if (UseAVX >= 2) { |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7260 // clean upper bits of YMM registers |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7261 vzeroupper(); |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
7262 } |
|
7637
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7263 subptr(len, 8); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7264 jccb(Assembler::greater, L_copy_8_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7265 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7266 bind(L_copy_8_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7267 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7268 ptest(tmp3Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7269 jccb(Assembler::notZero, L_copy_8_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7270 packuswb(tmp3Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7271 movq(Address(dst, len, Address::times_1, -8), tmp3Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7272 addptr(len, 8); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7273 jccb(Assembler::lessEqual, L_copy_8_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7274 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7275 bind(L_copy_8_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7276 subptr(len, 8); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7277 jccb(Assembler::zero, L_done); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7278 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7279 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7280 bind(L_copy_1_char); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7281 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7282 testl(tmp5, 0xff00); // check if Unicode char |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7283 jccb(Assembler::notZero, L_copy_1_char_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7284 movb(Address(dst, len, Address::times_1, 0), tmp5); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7285 addptr(len, 1); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7286 jccb(Assembler::less, L_copy_1_char); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7287 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7288 bind(L_copy_1_char_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7289 addptr(result, len); // len is negative count of not processed elements |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7290 bind(L_done); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7291 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
7292 |
|
11080
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7293 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7294 * Emits code to update CRC-32 with a byte value according to constants in table |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7295 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7296 * @param [in,out]crc Register containing the crc. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7297 * @param [in]val Register containing the byte to fold into the CRC. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7298 * @param [in]table Register containing the table of crc constants. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7299 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7300 * uint32_t crc; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7301 * val = crc_table[(val ^ crc) & 0xFF]; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7302 * crc = val ^ (crc >> 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7303 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7304 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7305 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7306 xorl(val, crc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7307 andl(val, 0xFF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7308 shrl(crc, 8); // unsigned shift |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7309 xorl(crc, Address(table, val, Address::times_4, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7310 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7311 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7312 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7313 * Fold 128-bit data chunk |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7314 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7315 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7316 vpclmulhdq(xtmp, xK, xcrc); // [123:64] |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7317 vpclmulldq(xcrc, xK, xcrc); // [63:0] |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7318 vpxor(xcrc, xcrc, Address(buf, offset), false /* vector256 */); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7319 pxor(xcrc, xtmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7320 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7321 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7322 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7323 vpclmulhdq(xtmp, xK, xcrc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7324 vpclmulldq(xcrc, xK, xcrc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7325 pxor(xcrc, xbuf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7326 pxor(xcrc, xtmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7327 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7328 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7329 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7330 * 8-bit folds to compute 32-bit CRC |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7331 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7332 * uint64_t xcrc; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7333 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7334 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7335 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7336 movdl(tmp, xcrc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7337 andl(tmp, 0xFF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7338 movdl(xtmp, Address(table, tmp, Address::times_4, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7339 psrldq(xcrc, 1); // unsigned shift one byte |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7340 pxor(xcrc, xtmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7341 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7342 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7343 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7344 * uint32_t crc; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7345 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7346 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7347 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7348 movl(tmp, crc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7349 andl(tmp, 0xFF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7350 shrl(crc, 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7351 xorl(crc, Address(table, tmp, Address::times_4, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7352 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7353 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7354 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7355 * @param crc register containing existing CRC (32-bit) |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7356 * @param buf register pointing to input byte buffer (byte*) |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7357 * @param len register containing number of bytes |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7358 * @param table register that will contain address of CRC table |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7359 * @param tmp scratch register |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7360 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7361 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7362 assert_different_registers(crc, buf, len, table, tmp, rax); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7363 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7364 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7365 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7366 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7367 lea(table, ExternalAddress(StubRoutines::crc_table_addr())); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7368 notl(crc); // ~crc |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7369 cmpl(len, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7370 jcc(Assembler::less, L_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7371 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7372 // Align buffer to 16 bytes |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7373 movl(tmp, buf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7374 andl(tmp, 0xF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7375 jccb(Assembler::zero, L_aligned); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7376 subl(tmp, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7377 addl(len, tmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7378 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7379 align(4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7380 BIND(L_align_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7381 movsbl(rax, Address(buf, 0)); // load byte with sign extension |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7382 update_byte_crc32(crc, rax, table); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7383 increment(buf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7384 incrementl(tmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7385 jccb(Assembler::less, L_align_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7386 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7387 BIND(L_aligned); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7388 movl(tmp, len); // save |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7389 shrl(len, 4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7390 jcc(Assembler::zero, L_tail_restore); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7391 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7392 // Fold crc into first bytes of vector |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7393 movdqa(xmm1, Address(buf, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7394 movdl(rax, xmm1); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7395 xorl(crc, rax); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7396 pinsrd(xmm1, crc, 0); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7397 addptr(buf, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7398 subl(len, 4); // len > 0 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7399 jcc(Assembler::less, L_fold_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7400 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7401 movdqa(xmm2, Address(buf, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7402 movdqa(xmm3, Address(buf, 16)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7403 movdqa(xmm4, Address(buf, 32)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7404 addptr(buf, 48); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7405 subl(len, 3); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7406 jcc(Assembler::lessEqual, L_fold_512b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7407 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7408 // Fold total 512 bits of polynomial on each iteration, |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7409 // 128 bits per each of 4 parallel streams. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7410 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7411 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7412 align(32); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7413 BIND(L_fold_512b_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7414 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7415 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7416 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7417 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7418 addptr(buf, 64); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7419 subl(len, 4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7420 jcc(Assembler::greater, L_fold_512b_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7421 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7422 // Fold 512 bits to 128 bits. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7423 BIND(L_fold_512b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7424 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7425 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7426 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7427 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7428 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7429 // Fold the rest of 128 bits data chunks |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7430 BIND(L_fold_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7431 addl(len, 3); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7432 jccb(Assembler::lessEqual, L_fold_128b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7433 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7434 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7435 BIND(L_fold_tail_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7436 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7437 addptr(buf, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7438 decrementl(len); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7439 jccb(Assembler::greater, L_fold_tail_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7440 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7441 // Fold 128 bits in xmm1 down into 32 bits in crc register. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7442 BIND(L_fold_128b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7443 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr())); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7444 vpclmulqdq(xmm2, xmm0, xmm1, 0x1); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7445 vpand(xmm3, xmm0, xmm2, false /* vector256 */); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
7446 vpclmulqdq(xmm0, xmm0, xmm3, 0x1); |
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7447 psrldq(xmm1, 8); |
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7448 psrldq(xmm2, 4); |
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7449 pxor(xmm0, xmm1); |
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7450 pxor(xmm0, xmm2); |
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7451 |
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|
7452 // 8 8-bit folds to compute 32-bit CRC. |
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7453 for (int j = 0; j < 4; j++) { |
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7454 fold_8bit_crc32(xmm0, table, xmm1, rax); |
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7455 } |
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7456 movdl(crc, xmm0); // mov 32 bits to general register |
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|
7457 for (int j = 0; j < 4; j++) { |
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7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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7458 fold_8bit_crc32(crc, table, rax); |
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7459 } |
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|
7460 |
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7461 BIND(L_tail_restore); |
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7462 movl(len, tmp); // restore |
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7463 BIND(L_tail); |
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7464 andl(len, 0xf); |
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7465 jccb(Assembler::zero, L_exit); |
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|
7466 |
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|
7467 // Fold the rest of bytes |
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7468 align(4); |
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7469 BIND(L_tail_loop); |
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7470 movsbl(rax, Address(buf, 0)); // load byte with sign extension |
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|
7471 update_byte_crc32(crc, rax, table); |
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7472 increment(buf); |
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|
7473 decrementl(len); |
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|
7474 jccb(Assembler::greater, L_tail_loop); |
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|
7475 |
|
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|
7476 BIND(L_exit); |
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|
7477 notl(crc); // ~c |
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7478 } |
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7479 |
| 7199 | 7480 #undef BIND |
| 7481 #undef BLOCK_COMMENT | |
| 7482 | |
| 7483 | |
| 7484 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { | |
| 7485 switch (cond) { | |
| 7486 // Note some conditions are synonyms for others | |
| 7487 case Assembler::zero: return Assembler::notZero; | |
| 7488 case Assembler::notZero: return Assembler::zero; | |
| 7489 case Assembler::less: return Assembler::greaterEqual; | |
| 7490 case Assembler::lessEqual: return Assembler::greater; | |
| 7491 case Assembler::greater: return Assembler::lessEqual; | |
| 7492 case Assembler::greaterEqual: return Assembler::less; | |
| 7493 case Assembler::below: return Assembler::aboveEqual; | |
| 7494 case Assembler::belowEqual: return Assembler::above; | |
| 7495 case Assembler::above: return Assembler::belowEqual; | |
| 7496 case Assembler::aboveEqual: return Assembler::below; | |
| 7497 case Assembler::overflow: return Assembler::noOverflow; | |
| 7498 case Assembler::noOverflow: return Assembler::overflow; | |
| 7499 case Assembler::negative: return Assembler::positive; | |
| 7500 case Assembler::positive: return Assembler::negative; | |
| 7501 case Assembler::parity: return Assembler::noParity; | |
| 7502 case Assembler::noParity: return Assembler::parity; | |
| 7503 } | |
| 7504 ShouldNotReachHere(); return Assembler::overflow; | |
| 7505 } | |
| 7506 | |
| 7507 SkipIfEqual::SkipIfEqual( | |
| 7508 MacroAssembler* masm, const bool* flag_addr, bool value) { | |
| 7509 _masm = masm; | |
| 7510 _masm->cmp8(ExternalAddress((address)flag_addr), value); | |
| 7511 _masm->jcc(Assembler::equal, _label); | |
| 7512 } | |
| 7513 | |
| 7514 SkipIfEqual::~SkipIfEqual() { | |
| 7515 _masm->bind(_label); | |
| 7516 } |