Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/macroAssembler_x86.cpp @ 11080:b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
Summary: add intrinsics using new instruction to interpreter, C1, C2, for suitable x86; add test
Reviewed-by: kvn, twisti
| author | drchase |
|---|---|
| date | Tue, 02 Jul 2013 20:42:12 -0400 |
| parents | e961c11b85fe |
| children | 6b0fd0964b87 740e263c80c6 |
| rev | line source |
|---|---|
| 7199 | 1 /* |
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7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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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" | |
| 33 #include "prims/methodHandles.hpp" | |
| 34 #include "runtime/biasedLocking.hpp" | |
| 35 #include "runtime/interfaceSupport.hpp" | |
| 36 #include "runtime/objectMonitor.hpp" | |
| 37 #include "runtime/os.hpp" | |
| 38 #include "runtime/sharedRuntime.hpp" | |
| 39 #include "runtime/stubRoutines.hpp" | |
|
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40 #include "utilities/macros.hpp" |
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41 #if INCLUDE_ALL_GCS |
| 7199 | 42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 43 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
| 44 #include "gc_implementation/g1/heapRegion.hpp" | |
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45 #endif // INCLUDE_ALL_GCS |
| 7199 | 46 |
| 47 #ifdef PRODUCT | |
| 48 #define BLOCK_COMMENT(str) /* nothing */ | |
| 49 #define STOP(error) stop(error) | |
| 50 #else | |
| 51 #define BLOCK_COMMENT(str) block_comment(str) | |
| 52 #define STOP(error) block_comment(error); stop(error) | |
| 53 #endif | |
| 54 | |
| 55 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
| 56 | |
| 57 | |
|
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58 #ifdef ASSERT |
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59 bool AbstractAssembler::pd_check_instruction_mark() { return true; } |
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60 #endif |
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61 |
| 7199 | 62 static Assembler::Condition reverse[] = { |
| 63 Assembler::noOverflow /* overflow = 0x0 */ , | |
| 64 Assembler::overflow /* noOverflow = 0x1 */ , | |
| 65 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ , | |
| 66 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ , | |
| 67 Assembler::notZero /* zero = 0x4, equal = 0x4 */ , | |
| 68 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ , | |
| 69 Assembler::above /* belowEqual = 0x6 */ , | |
| 70 Assembler::belowEqual /* above = 0x7 */ , | |
| 71 Assembler::positive /* negative = 0x8 */ , | |
| 72 Assembler::negative /* positive = 0x9 */ , | |
| 73 Assembler::noParity /* parity = 0xa */ , | |
| 74 Assembler::parity /* noParity = 0xb */ , | |
| 75 Assembler::greaterEqual /* less = 0xc */ , | |
| 76 Assembler::less /* greaterEqual = 0xd */ , | |
| 77 Assembler::greater /* lessEqual = 0xe */ , | |
| 78 Assembler::lessEqual /* greater = 0xf, */ | |
| 79 | |
| 80 }; | |
| 81 | |
| 82 | |
| 83 // Implementation of MacroAssembler | |
| 84 | |
| 85 // First all the versions that have distinct versions depending on 32/64 bit | |
| 86 // Unless the difference is trivial (1 line or so). | |
| 87 | |
| 88 #ifndef _LP64 | |
| 89 | |
| 90 // 32bit versions | |
| 91 | |
| 92 Address MacroAssembler::as_Address(AddressLiteral adr) { | |
| 93 return Address(adr.target(), adr.rspec()); | |
| 94 } | |
| 95 | |
| 96 Address MacroAssembler::as_Address(ArrayAddress adr) { | |
| 97 return Address::make_array(adr); | |
| 98 } | |
| 99 | |
| 100 int MacroAssembler::biased_locking_enter(Register lock_reg, | |
| 101 Register obj_reg, | |
| 102 Register swap_reg, | |
| 103 Register tmp_reg, | |
| 104 bool swap_reg_contains_mark, | |
| 105 Label& done, | |
| 106 Label* slow_case, | |
| 107 BiasedLockingCounters* counters) { | |
| 108 assert(UseBiasedLocking, "why call this otherwise?"); | |
| 109 assert(swap_reg == rax, "swap_reg must be rax, for cmpxchg"); | |
| 110 assert_different_registers(lock_reg, obj_reg, swap_reg); | |
| 111 | |
| 112 if (PrintBiasedLockingStatistics && counters == NULL) | |
| 113 counters = BiasedLocking::counters(); | |
| 114 | |
| 115 bool need_tmp_reg = false; | |
| 116 if (tmp_reg == noreg) { | |
| 117 need_tmp_reg = true; | |
| 118 tmp_reg = lock_reg; | |
| 119 } else { | |
| 120 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); | |
| 121 } | |
| 122 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); | |
| 123 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); | |
| 124 Address klass_addr (obj_reg, oopDesc::klass_offset_in_bytes()); | |
| 125 Address saved_mark_addr(lock_reg, 0); | |
| 126 | |
| 127 // Biased locking | |
| 128 // See whether the lock is currently biased toward our thread and | |
| 129 // whether the epoch is still valid | |
| 130 // Note that the runtime guarantees sufficient alignment of JavaThread | |
| 131 // pointers to allow age to be placed into low bits | |
| 132 // First check to see whether biasing is even enabled for this object | |
| 133 Label cas_label; | |
| 134 int null_check_offset = -1; | |
| 135 if (!swap_reg_contains_mark) { | |
| 136 null_check_offset = offset(); | |
| 137 movl(swap_reg, mark_addr); | |
| 138 } | |
| 139 if (need_tmp_reg) { | |
| 140 push(tmp_reg); | |
| 141 } | |
| 142 movl(tmp_reg, swap_reg); | |
| 143 andl(tmp_reg, markOopDesc::biased_lock_mask_in_place); | |
| 144 cmpl(tmp_reg, markOopDesc::biased_lock_pattern); | |
| 145 if (need_tmp_reg) { | |
| 146 pop(tmp_reg); | |
| 147 } | |
| 148 jcc(Assembler::notEqual, cas_label); | |
| 149 // The bias pattern is present in the object's header. Need to check | |
| 150 // whether the bias owner and the epoch are both still current. | |
| 151 // Note that because there is no current thread register on x86 we | |
| 152 // need to store off the mark word we read out of the object to | |
| 153 // avoid reloading it and needing to recheck invariants below. This | |
| 154 // store is unfortunate but it makes the overall code shorter and | |
| 155 // simpler. | |
| 156 movl(saved_mark_addr, swap_reg); | |
| 157 if (need_tmp_reg) { | |
| 158 push(tmp_reg); | |
| 159 } | |
| 160 get_thread(tmp_reg); | |
| 161 xorl(swap_reg, tmp_reg); | |
| 162 if (swap_reg_contains_mark) { | |
| 163 null_check_offset = offset(); | |
| 164 } | |
| 165 movl(tmp_reg, klass_addr); | |
| 166 xorl(swap_reg, Address(tmp_reg, Klass::prototype_header_offset())); | |
| 167 andl(swap_reg, ~((int) markOopDesc::age_mask_in_place)); | |
| 168 if (need_tmp_reg) { | |
| 169 pop(tmp_reg); | |
| 170 } | |
| 171 if (counters != NULL) { | |
| 172 cond_inc32(Assembler::zero, | |
| 173 ExternalAddress((address)counters->biased_lock_entry_count_addr())); | |
| 174 } | |
| 175 jcc(Assembler::equal, done); | |
| 176 | |
| 177 Label try_revoke_bias; | |
| 178 Label try_rebias; | |
| 179 | |
| 180 // At this point we know that the header has the bias pattern and | |
| 181 // that we are not the bias owner in the current epoch. We need to | |
| 182 // figure out more details about the state of the header in order to | |
| 183 // know what operations can be legally performed on the object's | |
| 184 // header. | |
| 185 | |
| 186 // If the low three bits in the xor result aren't clear, that means | |
| 187 // the prototype header is no longer biased and we have to revoke | |
| 188 // the bias on this object. | |
| 189 testl(swap_reg, markOopDesc::biased_lock_mask_in_place); | |
| 190 jcc(Assembler::notZero, try_revoke_bias); | |
| 191 | |
| 192 // Biasing is still enabled for this data type. See whether the | |
| 193 // epoch of the current bias is still valid, meaning that the epoch | |
| 194 // bits of the mark word are equal to the epoch bits of the | |
| 195 // prototype header. (Note that the prototype header's epoch bits | |
| 196 // only change at a safepoint.) If not, attempt to rebias the object | |
| 197 // toward the current thread. Note that we must be absolutely sure | |
| 198 // that the current epoch is invalid in order to do this because | |
| 199 // otherwise the manipulations it performs on the mark word are | |
| 200 // illegal. | |
| 201 testl(swap_reg, markOopDesc::epoch_mask_in_place); | |
| 202 jcc(Assembler::notZero, try_rebias); | |
| 203 | |
| 204 // The epoch of the current bias is still valid but we know nothing | |
| 205 // about the owner; it might be set or it might be clear. Try to | |
| 206 // acquire the bias of the object using an atomic operation. If this | |
| 207 // fails we will go in to the runtime to revoke the object's bias. | |
| 208 // Note that we first construct the presumed unbiased header so we | |
| 209 // don't accidentally blow away another thread's valid bias. | |
| 210 movl(swap_reg, saved_mark_addr); | |
| 211 andl(swap_reg, | |
| 212 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); | |
| 213 if (need_tmp_reg) { | |
| 214 push(tmp_reg); | |
| 215 } | |
| 216 get_thread(tmp_reg); | |
| 217 orl(tmp_reg, swap_reg); | |
| 218 if (os::is_MP()) { | |
| 219 lock(); | |
| 220 } | |
| 221 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); | |
| 222 if (need_tmp_reg) { | |
| 223 pop(tmp_reg); | |
| 224 } | |
| 225 // If the biasing toward our thread failed, this means that | |
| 226 // another thread succeeded in biasing it toward itself and we | |
| 227 // need to revoke that bias. The revocation will occur in the | |
| 228 // interpreter runtime in the slow case. | |
| 229 if (counters != NULL) { | |
| 230 cond_inc32(Assembler::zero, | |
| 231 ExternalAddress((address)counters->anonymously_biased_lock_entry_count_addr())); | |
| 232 } | |
| 233 if (slow_case != NULL) { | |
| 234 jcc(Assembler::notZero, *slow_case); | |
| 235 } | |
| 236 jmp(done); | |
| 237 | |
| 238 bind(try_rebias); | |
| 239 // At this point we know the epoch has expired, meaning that the | |
| 240 // current "bias owner", if any, is actually invalid. Under these | |
| 241 // circumstances _only_, we are allowed to use the current header's | |
| 242 // value as the comparison value when doing the cas to acquire the | |
| 243 // bias in the current epoch. In other words, we allow transfer of | |
| 244 // the bias from one thread to another directly in this situation. | |
| 245 // | |
| 246 // FIXME: due to a lack of registers we currently blow away the age | |
| 247 // bits in this situation. Should attempt to preserve them. | |
| 248 if (need_tmp_reg) { | |
| 249 push(tmp_reg); | |
| 250 } | |
| 251 get_thread(tmp_reg); | |
| 252 movl(swap_reg, klass_addr); | |
| 253 orl(tmp_reg, Address(swap_reg, Klass::prototype_header_offset())); | |
| 254 movl(swap_reg, saved_mark_addr); | |
| 255 if (os::is_MP()) { | |
| 256 lock(); | |
| 257 } | |
| 258 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); | |
| 259 if (need_tmp_reg) { | |
| 260 pop(tmp_reg); | |
| 261 } | |
| 262 // If the biasing toward our thread failed, then another thread | |
| 263 // succeeded in biasing it toward itself and we need to revoke that | |
| 264 // bias. The revocation will occur in the runtime in the slow case. | |
| 265 if (counters != NULL) { | |
| 266 cond_inc32(Assembler::zero, | |
| 267 ExternalAddress((address)counters->rebiased_lock_entry_count_addr())); | |
| 268 } | |
| 269 if (slow_case != NULL) { | |
| 270 jcc(Assembler::notZero, *slow_case); | |
| 271 } | |
| 272 jmp(done); | |
| 273 | |
| 274 bind(try_revoke_bias); | |
| 275 // The prototype mark in the klass doesn't have the bias bit set any | |
| 276 // more, indicating that objects of this data type are not supposed | |
| 277 // to be biased any more. We are going to try to reset the mark of | |
| 278 // this object to the prototype value and fall through to the | |
| 279 // CAS-based locking scheme. Note that if our CAS fails, it means | |
| 280 // that another thread raced us for the privilege of revoking the | |
| 281 // bias of this particular object, so it's okay to continue in the | |
| 282 // normal locking code. | |
| 283 // | |
| 284 // FIXME: due to a lack of registers we currently blow away the age | |
| 285 // bits in this situation. Should attempt to preserve them. | |
| 286 movl(swap_reg, saved_mark_addr); | |
| 287 if (need_tmp_reg) { | |
| 288 push(tmp_reg); | |
| 289 } | |
| 290 movl(tmp_reg, klass_addr); | |
| 291 movl(tmp_reg, Address(tmp_reg, Klass::prototype_header_offset())); | |
| 292 if (os::is_MP()) { | |
| 293 lock(); | |
| 294 } | |
| 295 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); | |
| 296 if (need_tmp_reg) { | |
| 297 pop(tmp_reg); | |
| 298 } | |
| 299 // Fall through to the normal CAS-based lock, because no matter what | |
| 300 // the result of the above CAS, some thread must have succeeded in | |
| 301 // removing the bias bit from the object's header. | |
| 302 if (counters != NULL) { | |
| 303 cond_inc32(Assembler::zero, | |
| 304 ExternalAddress((address)counters->revoked_lock_entry_count_addr())); | |
| 305 } | |
| 306 | |
| 307 bind(cas_label); | |
| 308 | |
| 309 return null_check_offset; | |
| 310 } | |
| 311 void MacroAssembler::call_VM_leaf_base(address entry_point, | |
| 312 int number_of_arguments) { | |
| 313 call(RuntimeAddress(entry_point)); | |
| 314 increment(rsp, number_of_arguments * wordSize); | |
| 315 } | |
| 316 | |
| 317 void MacroAssembler::cmpklass(Address src1, Metadata* obj) { | |
| 318 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 319 } | |
| 320 | |
| 321 void MacroAssembler::cmpklass(Register src1, Metadata* obj) { | |
| 322 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 323 } | |
| 324 | |
| 325 void MacroAssembler::cmpoop(Address src1, jobject obj) { | |
| 326 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 327 } | |
| 328 | |
| 329 void MacroAssembler::cmpoop(Register src1, jobject obj) { | |
| 330 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 331 } | |
| 332 | |
| 333 void MacroAssembler::extend_sign(Register hi, Register lo) { | |
| 334 // According to Intel Doc. AP-526, "Integer Divide", p.18. | |
| 335 if (VM_Version::is_P6() && hi == rdx && lo == rax) { | |
| 336 cdql(); | |
| 337 } else { | |
| 338 movl(hi, lo); | |
| 339 sarl(hi, 31); | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 void MacroAssembler::jC2(Register tmp, Label& L) { | |
| 344 // set parity bit if FPU flag C2 is set (via rax) | |
| 345 save_rax(tmp); | |
| 346 fwait(); fnstsw_ax(); | |
| 347 sahf(); | |
| 348 restore_rax(tmp); | |
| 349 // branch | |
| 350 jcc(Assembler::parity, L); | |
| 351 } | |
| 352 | |
| 353 void MacroAssembler::jnC2(Register tmp, Label& L) { | |
| 354 // set parity bit if FPU flag C2 is set (via rax) | |
| 355 save_rax(tmp); | |
| 356 fwait(); fnstsw_ax(); | |
| 357 sahf(); | |
| 358 restore_rax(tmp); | |
| 359 // branch | |
| 360 jcc(Assembler::noParity, L); | |
| 361 } | |
| 362 | |
| 363 // 32bit can do a case table jump in one instruction but we no longer allow the base | |
| 364 // to be installed in the Address class | |
| 365 void MacroAssembler::jump(ArrayAddress entry) { | |
| 366 jmp(as_Address(entry)); | |
| 367 } | |
| 368 | |
| 369 // Note: y_lo will be destroyed | |
| 370 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { | |
| 371 // Long compare for Java (semantics as described in JVM spec.) | |
| 372 Label high, low, done; | |
| 373 | |
| 374 cmpl(x_hi, y_hi); | |
| 375 jcc(Assembler::less, low); | |
| 376 jcc(Assembler::greater, high); | |
| 377 // x_hi is the return register | |
| 378 xorl(x_hi, x_hi); | |
| 379 cmpl(x_lo, y_lo); | |
| 380 jcc(Assembler::below, low); | |
| 381 jcc(Assembler::equal, done); | |
| 382 | |
| 383 bind(high); | |
| 384 xorl(x_hi, x_hi); | |
| 385 increment(x_hi); | |
| 386 jmp(done); | |
| 387 | |
| 388 bind(low); | |
| 389 xorl(x_hi, x_hi); | |
| 390 decrementl(x_hi); | |
| 391 | |
| 392 bind(done); | |
| 393 } | |
| 394 | |
| 395 void MacroAssembler::lea(Register dst, AddressLiteral src) { | |
| 396 mov_literal32(dst, (int32_t)src.target(), src.rspec()); | |
| 397 } | |
| 398 | |
| 399 void MacroAssembler::lea(Address dst, AddressLiteral adr) { | |
| 400 // leal(dst, as_Address(adr)); | |
| 401 // see note in movl as to why we must use a move | |
| 402 mov_literal32(dst, (int32_t) adr.target(), adr.rspec()); | |
| 403 } | |
| 404 | |
| 405 void MacroAssembler::leave() { | |
| 406 mov(rsp, rbp); | |
| 407 pop(rbp); | |
| 408 } | |
| 409 | |
| 410 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) { | |
| 411 // Multiplication of two Java long values stored on the stack | |
| 412 // as illustrated below. Result is in rdx:rax. | |
| 413 // | |
| 414 // rsp ---> [ ?? ] \ \ | |
| 415 // .... | y_rsp_offset | | |
| 416 // [ y_lo ] / (in bytes) | x_rsp_offset | |
| 417 // [ y_hi ] | (in bytes) | |
| 418 // .... | | |
| 419 // [ x_lo ] / | |
| 420 // [ x_hi ] | |
| 421 // .... | |
| 422 // | |
| 423 // Basic idea: lo(result) = lo(x_lo * y_lo) | |
| 424 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi) | |
| 425 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset); | |
| 426 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset); | |
| 427 Label quick; | |
| 428 // load x_hi, y_hi and check if quick | |
| 429 // multiplication is possible | |
| 430 movl(rbx, x_hi); | |
| 431 movl(rcx, y_hi); | |
| 432 movl(rax, rbx); | |
| 433 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0 | |
| 434 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply | |
| 435 // do full multiplication | |
| 436 // 1st step | |
| 437 mull(y_lo); // x_hi * y_lo | |
| 438 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx, | |
| 439 // 2nd step | |
| 440 movl(rax, x_lo); | |
| 441 mull(rcx); // x_lo * y_hi | |
| 442 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx, | |
| 443 // 3rd step | |
| 444 bind(quick); // note: rbx, = 0 if quick multiply! | |
| 445 movl(rax, x_lo); | |
| 446 mull(y_lo); // x_lo * y_lo | |
| 447 addl(rdx, rbx); // correct hi(x_lo * y_lo) | |
| 448 } | |
| 449 | |
| 450 void MacroAssembler::lneg(Register hi, Register lo) { | |
| 451 negl(lo); | |
| 452 adcl(hi, 0); | |
| 453 negl(hi); | |
| 454 } | |
| 455 | |
| 456 void MacroAssembler::lshl(Register hi, Register lo) { | |
| 457 // Java shift left long support (semantics as described in JVM spec., p.305) | |
| 458 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n)) | |
| 459 // shift value is in rcx ! | |
| 460 assert(hi != rcx, "must not use rcx"); | |
| 461 assert(lo != rcx, "must not use rcx"); | |
| 462 const Register s = rcx; // shift count | |
| 463 const int n = BitsPerWord; | |
| 464 Label L; | |
| 465 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) | |
| 466 cmpl(s, n); // if (s < n) | |
| 467 jcc(Assembler::less, L); // else (s >= n) | |
| 468 movl(hi, lo); // x := x << n | |
| 469 xorl(lo, lo); | |
| 470 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! | |
| 471 bind(L); // s (mod n) < n | |
| 472 shldl(hi, lo); // x := x << s | |
| 473 shll(lo); | |
| 474 } | |
| 475 | |
| 476 | |
| 477 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) { | |
| 478 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310) | |
| 479 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n)) | |
| 480 assert(hi != rcx, "must not use rcx"); | |
| 481 assert(lo != rcx, "must not use rcx"); | |
| 482 const Register s = rcx; // shift count | |
| 483 const int n = BitsPerWord; | |
| 484 Label L; | |
| 485 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) | |
| 486 cmpl(s, n); // if (s < n) | |
| 487 jcc(Assembler::less, L); // else (s >= n) | |
| 488 movl(lo, hi); // x := x >> n | |
| 489 if (sign_extension) sarl(hi, 31); | |
| 490 else xorl(hi, hi); | |
| 491 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! | |
| 492 bind(L); // s (mod n) < n | |
| 493 shrdl(lo, hi); // x := x >> s | |
| 494 if (sign_extension) sarl(hi); | |
| 495 else shrl(hi); | |
| 496 } | |
| 497 | |
| 498 void MacroAssembler::movoop(Register dst, jobject obj) { | |
| 499 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 500 } | |
| 501 | |
| 502 void MacroAssembler::movoop(Address dst, jobject obj) { | |
| 503 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 504 } | |
| 505 | |
| 506 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { | |
| 507 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 508 } | |
| 509 | |
| 510 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { | |
| 511 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 512 } | |
| 513 | |
| 514 void MacroAssembler::movptr(Register dst, AddressLiteral src) { | |
| 515 if (src.is_lval()) { | |
| 516 mov_literal32(dst, (intptr_t)src.target(), src.rspec()); | |
| 517 } else { | |
| 518 movl(dst, as_Address(src)); | |
| 519 } | |
| 520 } | |
| 521 | |
| 522 void MacroAssembler::movptr(ArrayAddress dst, Register src) { | |
| 523 movl(as_Address(dst), src); | |
| 524 } | |
| 525 | |
| 526 void MacroAssembler::movptr(Register dst, ArrayAddress src) { | |
| 527 movl(dst, as_Address(src)); | |
| 528 } | |
| 529 | |
| 530 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
| 531 void MacroAssembler::movptr(Address dst, intptr_t src) { | |
| 532 movl(dst, src); | |
| 533 } | |
| 534 | |
| 535 | |
| 536 void MacroAssembler::pop_callee_saved_registers() { | |
| 537 pop(rcx); | |
| 538 pop(rdx); | |
| 539 pop(rdi); | |
| 540 pop(rsi); | |
| 541 } | |
| 542 | |
| 543 void MacroAssembler::pop_fTOS() { | |
| 544 fld_d(Address(rsp, 0)); | |
| 545 addl(rsp, 2 * wordSize); | |
| 546 } | |
| 547 | |
| 548 void MacroAssembler::push_callee_saved_registers() { | |
| 549 push(rsi); | |
| 550 push(rdi); | |
| 551 push(rdx); | |
| 552 push(rcx); | |
| 553 } | |
| 554 | |
| 555 void MacroAssembler::push_fTOS() { | |
| 556 subl(rsp, 2 * wordSize); | |
| 557 fstp_d(Address(rsp, 0)); | |
| 558 } | |
| 559 | |
| 560 | |
| 561 void MacroAssembler::pushoop(jobject obj) { | |
| 562 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate()); | |
| 563 } | |
| 564 | |
| 565 void MacroAssembler::pushklass(Metadata* obj) { | |
| 566 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 567 } | |
| 568 | |
| 569 void MacroAssembler::pushptr(AddressLiteral src) { | |
| 570 if (src.is_lval()) { | |
| 571 push_literal32((int32_t)src.target(), src.rspec()); | |
| 572 } else { | |
| 573 pushl(as_Address(src)); | |
| 574 } | |
| 575 } | |
| 576 | |
| 577 void MacroAssembler::set_word_if_not_zero(Register dst) { | |
| 578 xorl(dst, dst); | |
| 579 set_byte_if_not_zero(dst); | |
| 580 } | |
| 581 | |
| 582 static void pass_arg0(MacroAssembler* masm, Register arg) { | |
| 583 masm->push(arg); | |
| 584 } | |
| 585 | |
| 586 static void pass_arg1(MacroAssembler* masm, Register arg) { | |
| 587 masm->push(arg); | |
| 588 } | |
| 589 | |
| 590 static void pass_arg2(MacroAssembler* masm, Register arg) { | |
| 591 masm->push(arg); | |
| 592 } | |
| 593 | |
| 594 static void pass_arg3(MacroAssembler* masm, Register arg) { | |
| 595 masm->push(arg); | |
| 596 } | |
| 597 | |
| 598 #ifndef PRODUCT | |
| 599 extern "C" void findpc(intptr_t x); | |
| 600 #endif | |
| 601 | |
| 602 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) { | |
| 603 // In order to get locks to work, we need to fake a in_VM state | |
| 604 JavaThread* thread = JavaThread::current(); | |
| 605 JavaThreadState saved_state = thread->thread_state(); | |
| 606 thread->set_thread_state(_thread_in_vm); | |
| 607 if (ShowMessageBoxOnError) { | |
| 608 JavaThread* thread = JavaThread::current(); | |
| 609 JavaThreadState saved_state = thread->thread_state(); | |
| 610 thread->set_thread_state(_thread_in_vm); | |
| 611 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
| 612 ttyLocker ttyl; | |
| 613 BytecodeCounter::print(); | |
| 614 } | |
| 615 // To see where a verify_oop failed, get $ebx+40/X for this frame. | |
| 616 // This is the value of eip which points to where verify_oop will return. | |
| 617 if (os::message_box(msg, "Execution stopped, print registers?")) { | |
| 618 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip); | |
| 619 BREAKPOINT; | |
| 620 } | |
| 621 } else { | |
| 622 ttyLocker ttyl; | |
| 623 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); | |
| 624 } | |
| 625 // Don't assert holding the ttyLock | |
| 626 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
| 627 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); | |
| 628 } | |
| 629 | |
| 630 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) { | |
| 631 ttyLocker ttyl; | |
| 632 FlagSetting fs(Debugging, true); | |
| 633 tty->print_cr("eip = 0x%08x", eip); | |
| 634 #ifndef PRODUCT | |
| 635 if ((WizardMode || Verbose) && PrintMiscellaneous) { | |
| 636 tty->cr(); | |
| 637 findpc(eip); | |
| 638 tty->cr(); | |
| 639 } | |
| 640 #endif | |
| 641 #define PRINT_REG(rax) \ | |
| 642 { tty->print("%s = ", #rax); os::print_location(tty, rax); } | |
| 643 PRINT_REG(rax); | |
| 644 PRINT_REG(rbx); | |
| 645 PRINT_REG(rcx); | |
| 646 PRINT_REG(rdx); | |
| 647 PRINT_REG(rdi); | |
| 648 PRINT_REG(rsi); | |
| 649 PRINT_REG(rbp); | |
| 650 PRINT_REG(rsp); | |
| 651 #undef PRINT_REG | |
| 652 // Print some words near top of staack. | |
| 653 int* dump_sp = (int*) rsp; | |
| 654 for (int col1 = 0; col1 < 8; col1++) { | |
| 655 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); | |
| 656 os::print_location(tty, *dump_sp++); | |
| 657 } | |
| 658 for (int row = 0; row < 16; row++) { | |
| 659 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); | |
| 660 for (int col = 0; col < 8; col++) { | |
| 661 tty->print(" 0x%08x", *dump_sp++); | |
| 662 } | |
| 663 tty->cr(); | |
| 664 } | |
| 665 // Print some instructions around pc: | |
| 666 Disassembler::decode((address)eip-64, (address)eip); | |
| 667 tty->print_cr("--------"); | |
| 668 Disassembler::decode((address)eip, (address)eip+32); | |
| 669 } | |
| 670 | |
| 671 void MacroAssembler::stop(const char* msg) { | |
| 672 ExternalAddress message((address)msg); | |
| 673 // push address of message | |
| 674 pushptr(message.addr()); | |
| 675 { Label L; call(L, relocInfo::none); bind(L); } // push eip | |
| 676 pusha(); // push registers | |
| 677 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); | |
| 678 hlt(); | |
| 679 } | |
| 680 | |
| 681 void MacroAssembler::warn(const char* msg) { | |
| 682 push_CPU_state(); | |
| 683 | |
| 684 ExternalAddress message((address) msg); | |
| 685 // push address of message | |
| 686 pushptr(message.addr()); | |
| 687 | |
| 688 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning))); | |
| 689 addl(rsp, wordSize); // discard argument | |
| 690 pop_CPU_state(); | |
| 691 } | |
| 692 | |
| 693 void MacroAssembler::print_state() { | |
| 694 { Label L; call(L, relocInfo::none); bind(L); } // push eip | |
| 695 pusha(); // push registers | |
| 696 | |
| 697 push_CPU_state(); | |
| 698 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32))); | |
| 699 pop_CPU_state(); | |
| 700 | |
| 701 popa(); | |
| 702 addl(rsp, wordSize); | |
| 703 } | |
| 704 | |
| 705 #else // _LP64 | |
| 706 | |
| 707 // 64 bit versions | |
| 708 | |
| 709 Address MacroAssembler::as_Address(AddressLiteral adr) { | |
| 710 // amd64 always does this as a pc-rel | |
| 711 // we can be absolute or disp based on the instruction type | |
| 712 // jmp/call are displacements others are absolute | |
| 713 assert(!adr.is_lval(), "must be rval"); | |
| 714 assert(reachable(adr), "must be"); | |
| 715 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc()); | |
| 716 | |
| 717 } | |
| 718 | |
| 719 Address MacroAssembler::as_Address(ArrayAddress adr) { | |
| 720 AddressLiteral base = adr.base(); | |
| 721 lea(rscratch1, base); | |
| 722 Address index = adr.index(); | |
| 723 assert(index._disp == 0, "must not have disp"); // maybe it can? | |
| 724 Address array(rscratch1, index._index, index._scale, index._disp); | |
| 725 return array; | |
| 726 } | |
| 727 | |
| 728 int MacroAssembler::biased_locking_enter(Register lock_reg, | |
| 729 Register obj_reg, | |
| 730 Register swap_reg, | |
| 731 Register tmp_reg, | |
| 732 bool swap_reg_contains_mark, | |
| 733 Label& done, | |
| 734 Label* slow_case, | |
| 735 BiasedLockingCounters* counters) { | |
| 736 assert(UseBiasedLocking, "why call this otherwise?"); | |
| 737 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq"); | |
| 738 assert(tmp_reg != noreg, "tmp_reg must be supplied"); | |
| 739 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); | |
| 740 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); | |
| 741 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); | |
| 742 Address saved_mark_addr(lock_reg, 0); | |
| 743 | |
| 744 if (PrintBiasedLockingStatistics && counters == NULL) | |
| 745 counters = BiasedLocking::counters(); | |
| 746 | |
| 747 // Biased locking | |
| 748 // See whether the lock is currently biased toward our thread and | |
| 749 // whether the epoch is still valid | |
| 750 // Note that the runtime guarantees sufficient alignment of JavaThread | |
| 751 // pointers to allow age to be placed into low bits | |
| 752 // First check to see whether biasing is even enabled for this object | |
| 753 Label cas_label; | |
| 754 int null_check_offset = -1; | |
| 755 if (!swap_reg_contains_mark) { | |
| 756 null_check_offset = offset(); | |
| 757 movq(swap_reg, mark_addr); | |
| 758 } | |
| 759 movq(tmp_reg, swap_reg); | |
| 760 andq(tmp_reg, markOopDesc::biased_lock_mask_in_place); | |
| 761 cmpq(tmp_reg, markOopDesc::biased_lock_pattern); | |
| 762 jcc(Assembler::notEqual, cas_label); | |
| 763 // The bias pattern is present in the object's header. Need to check | |
| 764 // whether the bias owner and the epoch are both still current. | |
| 765 load_prototype_header(tmp_reg, obj_reg); | |
| 766 orq(tmp_reg, r15_thread); | |
| 767 xorq(tmp_reg, swap_reg); | |
| 768 andq(tmp_reg, ~((int) markOopDesc::age_mask_in_place)); | |
| 769 if (counters != NULL) { | |
| 770 cond_inc32(Assembler::zero, | |
| 771 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); | |
| 772 } | |
| 773 jcc(Assembler::equal, done); | |
| 774 | |
| 775 Label try_revoke_bias; | |
| 776 Label try_rebias; | |
| 777 | |
| 778 // At this point we know that the header has the bias pattern and | |
| 779 // that we are not the bias owner in the current epoch. We need to | |
| 780 // figure out more details about the state of the header in order to | |
| 781 // know what operations can be legally performed on the object's | |
| 782 // header. | |
| 783 | |
| 784 // If the low three bits in the xor result aren't clear, that means | |
| 785 // the prototype header is no longer biased and we have to revoke | |
| 786 // the bias on this object. | |
| 787 testq(tmp_reg, markOopDesc::biased_lock_mask_in_place); | |
| 788 jcc(Assembler::notZero, try_revoke_bias); | |
| 789 | |
| 790 // Biasing is still enabled for this data type. See whether the | |
| 791 // epoch of the current bias is still valid, meaning that the epoch | |
| 792 // bits of the mark word are equal to the epoch bits of the | |
| 793 // prototype header. (Note that the prototype header's epoch bits | |
| 794 // only change at a safepoint.) If not, attempt to rebias the object | |
| 795 // toward the current thread. Note that we must be absolutely sure | |
| 796 // that the current epoch is invalid in order to do this because | |
| 797 // otherwise the manipulations it performs on the mark word are | |
| 798 // illegal. | |
| 799 testq(tmp_reg, markOopDesc::epoch_mask_in_place); | |
| 800 jcc(Assembler::notZero, try_rebias); | |
| 801 | |
| 802 // The epoch of the current bias is still valid but we know nothing | |
| 803 // about the owner; it might be set or it might be clear. Try to | |
| 804 // acquire the bias of the object using an atomic operation. If this | |
| 805 // fails we will go in to the runtime to revoke the object's bias. | |
| 806 // Note that we first construct the presumed unbiased header so we | |
| 807 // don't accidentally blow away another thread's valid bias. | |
| 808 andq(swap_reg, | |
| 809 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); | |
| 810 movq(tmp_reg, swap_reg); | |
| 811 orq(tmp_reg, r15_thread); | |
| 812 if (os::is_MP()) { | |
| 813 lock(); | |
| 814 } | |
| 815 cmpxchgq(tmp_reg, Address(obj_reg, 0)); | |
| 816 // If the biasing toward our thread failed, this means that | |
| 817 // another thread succeeded in biasing it toward itself and we | |
| 818 // need to revoke that bias. The revocation will occur in the | |
| 819 // interpreter runtime in the slow case. | |
| 820 if (counters != NULL) { | |
| 821 cond_inc32(Assembler::zero, | |
| 822 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); | |
| 823 } | |
| 824 if (slow_case != NULL) { | |
| 825 jcc(Assembler::notZero, *slow_case); | |
| 826 } | |
| 827 jmp(done); | |
| 828 | |
| 829 bind(try_rebias); | |
| 830 // At this point we know the epoch has expired, meaning that the | |
| 831 // current "bias owner", if any, is actually invalid. Under these | |
| 832 // circumstances _only_, we are allowed to use the current header's | |
| 833 // value as the comparison value when doing the cas to acquire the | |
| 834 // bias in the current epoch. In other words, we allow transfer of | |
| 835 // the bias from one thread to another directly in this situation. | |
| 836 // | |
| 837 // FIXME: due to a lack of registers we currently blow away the age | |
| 838 // bits in this situation. Should attempt to preserve them. | |
| 839 load_prototype_header(tmp_reg, obj_reg); | |
| 840 orq(tmp_reg, r15_thread); | |
| 841 if (os::is_MP()) { | |
| 842 lock(); | |
| 843 } | |
| 844 cmpxchgq(tmp_reg, Address(obj_reg, 0)); | |
| 845 // If the biasing toward our thread failed, then another thread | |
| 846 // succeeded in biasing it toward itself and we need to revoke that | |
| 847 // bias. The revocation will occur in the runtime in the slow case. | |
| 848 if (counters != NULL) { | |
| 849 cond_inc32(Assembler::zero, | |
| 850 ExternalAddress((address) counters->rebiased_lock_entry_count_addr())); | |
| 851 } | |
| 852 if (slow_case != NULL) { | |
| 853 jcc(Assembler::notZero, *slow_case); | |
| 854 } | |
| 855 jmp(done); | |
| 856 | |
| 857 bind(try_revoke_bias); | |
| 858 // The prototype mark in the klass doesn't have the bias bit set any | |
| 859 // more, indicating that objects of this data type are not supposed | |
| 860 // to be biased any more. We are going to try to reset the mark of | |
| 861 // this object to the prototype value and fall through to the | |
| 862 // CAS-based locking scheme. Note that if our CAS fails, it means | |
| 863 // that another thread raced us for the privilege of revoking the | |
| 864 // bias of this particular object, so it's okay to continue in the | |
| 865 // normal locking code. | |
| 866 // | |
| 867 // FIXME: due to a lack of registers we currently blow away the age | |
| 868 // bits in this situation. Should attempt to preserve them. | |
| 869 load_prototype_header(tmp_reg, obj_reg); | |
| 870 if (os::is_MP()) { | |
| 871 lock(); | |
| 872 } | |
| 873 cmpxchgq(tmp_reg, Address(obj_reg, 0)); | |
| 874 // Fall through to the normal CAS-based lock, because no matter what | |
| 875 // the result of the above CAS, some thread must have succeeded in | |
| 876 // removing the bias bit from the object's header. | |
| 877 if (counters != NULL) { | |
| 878 cond_inc32(Assembler::zero, | |
| 879 ExternalAddress((address) counters->revoked_lock_entry_count_addr())); | |
| 880 } | |
| 881 | |
| 882 bind(cas_label); | |
| 883 | |
| 884 return null_check_offset; | |
| 885 } | |
| 886 | |
| 887 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) { | |
| 888 Label L, E; | |
| 889 | |
| 890 #ifdef _WIN64 | |
| 891 // Windows always allocates space for it's register args | |
| 892 assert(num_args <= 4, "only register arguments supported"); | |
| 893 subq(rsp, frame::arg_reg_save_area_bytes); | |
| 894 #endif | |
| 895 | |
| 896 // Align stack if necessary | |
| 897 testl(rsp, 15); | |
| 898 jcc(Assembler::zero, L); | |
| 899 | |
| 900 subq(rsp, 8); | |
| 901 { | |
| 902 call(RuntimeAddress(entry_point)); | |
| 903 } | |
| 904 addq(rsp, 8); | |
| 905 jmp(E); | |
| 906 | |
| 907 bind(L); | |
| 908 { | |
| 909 call(RuntimeAddress(entry_point)); | |
| 910 } | |
| 911 | |
| 912 bind(E); | |
| 913 | |
| 914 #ifdef _WIN64 | |
| 915 // restore stack pointer | |
| 916 addq(rsp, frame::arg_reg_save_area_bytes); | |
| 917 #endif | |
| 918 | |
| 919 } | |
| 920 | |
| 921 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) { | |
| 922 assert(!src2.is_lval(), "should use cmpptr"); | |
| 923 | |
| 924 if (reachable(src2)) { | |
| 925 cmpq(src1, as_Address(src2)); | |
| 926 } else { | |
| 927 lea(rscratch1, src2); | |
| 928 Assembler::cmpq(src1, Address(rscratch1, 0)); | |
| 929 } | |
| 930 } | |
| 931 | |
| 932 int MacroAssembler::corrected_idivq(Register reg) { | |
| 933 // Full implementation of Java ldiv and lrem; checks for special | |
| 934 // case as described in JVM spec., p.243 & p.271. The function | |
| 935 // returns the (pc) offset of the idivl instruction - may be needed | |
| 936 // for implicit exceptions. | |
| 937 // | |
| 938 // normal case special case | |
| 939 // | |
| 940 // input : rax: dividend min_long | |
| 941 // reg: divisor (may not be eax/edx) -1 | |
| 942 // | |
| 943 // output: rax: quotient (= rax idiv reg) min_long | |
| 944 // rdx: remainder (= rax irem reg) 0 | |
| 945 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register"); | |
| 946 static const int64_t min_long = 0x8000000000000000; | |
| 947 Label normal_case, special_case; | |
| 948 | |
| 949 // check for special case | |
| 950 cmp64(rax, ExternalAddress((address) &min_long)); | |
| 951 jcc(Assembler::notEqual, normal_case); | |
| 952 xorl(rdx, rdx); // prepare rdx for possible special case (where | |
| 953 // remainder = 0) | |
| 954 cmpq(reg, -1); | |
| 955 jcc(Assembler::equal, special_case); | |
| 956 | |
| 957 // handle normal case | |
| 958 bind(normal_case); | |
| 959 cdqq(); | |
| 960 int idivq_offset = offset(); | |
| 961 idivq(reg); | |
| 962 | |
| 963 // normal and special case exit | |
| 964 bind(special_case); | |
| 965 | |
| 966 return idivq_offset; | |
| 967 } | |
| 968 | |
| 969 void MacroAssembler::decrementq(Register reg, int value) { | |
| 970 if (value == min_jint) { subq(reg, value); return; } | |
| 971 if (value < 0) { incrementq(reg, -value); return; } | |
| 972 if (value == 0) { ; return; } | |
| 973 if (value == 1 && UseIncDec) { decq(reg) ; return; } | |
| 974 /* else */ { subq(reg, value) ; return; } | |
| 975 } | |
| 976 | |
| 977 void MacroAssembler::decrementq(Address dst, int value) { | |
| 978 if (value == min_jint) { subq(dst, value); return; } | |
| 979 if (value < 0) { incrementq(dst, -value); return; } | |
| 980 if (value == 0) { ; return; } | |
| 981 if (value == 1 && UseIncDec) { decq(dst) ; return; } | |
| 982 /* else */ { subq(dst, value) ; return; } | |
| 983 } | |
| 984 | |
| 985 void MacroAssembler::incrementq(Register reg, int value) { | |
| 986 if (value == min_jint) { addq(reg, value); return; } | |
| 987 if (value < 0) { decrementq(reg, -value); return; } | |
| 988 if (value == 0) { ; return; } | |
| 989 if (value == 1 && UseIncDec) { incq(reg) ; return; } | |
| 990 /* else */ { addq(reg, value) ; return; } | |
| 991 } | |
| 992 | |
| 993 void MacroAssembler::incrementq(Address dst, int value) { | |
| 994 if (value == min_jint) { addq(dst, value); return; } | |
| 995 if (value < 0) { decrementq(dst, -value); return; } | |
| 996 if (value == 0) { ; return; } | |
| 997 if (value == 1 && UseIncDec) { incq(dst) ; return; } | |
| 998 /* else */ { addq(dst, value) ; return; } | |
| 999 } | |
| 1000 | |
| 1001 // 32bit can do a case table jump in one instruction but we no longer allow the base | |
| 1002 // to be installed in the Address class | |
| 1003 void MacroAssembler::jump(ArrayAddress entry) { | |
| 1004 lea(rscratch1, entry.base()); | |
| 1005 Address dispatch = entry.index(); | |
| 1006 assert(dispatch._base == noreg, "must be"); | |
| 1007 dispatch._base = rscratch1; | |
| 1008 jmp(dispatch); | |
| 1009 } | |
| 1010 | |
| 1011 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { | |
| 1012 ShouldNotReachHere(); // 64bit doesn't use two regs | |
| 1013 cmpq(x_lo, y_lo); | |
| 1014 } | |
| 1015 | |
| 1016 void MacroAssembler::lea(Register dst, AddressLiteral src) { | |
| 1017 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); | |
| 1018 } | |
| 1019 | |
| 1020 void MacroAssembler::lea(Address dst, AddressLiteral adr) { | |
| 1021 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec()); | |
| 1022 movptr(dst, rscratch1); | |
| 1023 } | |
| 1024 | |
| 1025 void MacroAssembler::leave() { | |
| 1026 // %%% 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
|
1027 emit_int8((unsigned char)0xC9); // LEAVE |
| 7199 | 1028 } |
| 1029 | |
| 1030 void MacroAssembler::lneg(Register hi, Register lo) { | |
| 1031 ShouldNotReachHere(); // 64bit doesn't use two regs | |
| 1032 negq(lo); | |
| 1033 } | |
| 1034 | |
| 1035 void MacroAssembler::movoop(Register dst, jobject obj) { | |
| 1036 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate()); | |
| 1037 } | |
| 1038 | |
| 1039 void MacroAssembler::movoop(Address dst, jobject obj) { | |
| 1040 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate()); | |
| 1041 movq(dst, rscratch1); | |
| 1042 } | |
| 1043 | |
| 1044 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { | |
| 1045 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 1046 } | |
| 1047 | |
| 1048 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { | |
| 1049 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); | |
| 1050 movq(dst, rscratch1); | |
| 1051 } | |
| 1052 | |
| 1053 void MacroAssembler::movptr(Register dst, AddressLiteral src) { | |
| 1054 if (src.is_lval()) { | |
| 1055 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); | |
| 1056 } else { | |
| 1057 if (reachable(src)) { | |
| 1058 movq(dst, as_Address(src)); | |
| 1059 } else { | |
| 1060 lea(rscratch1, src); | |
| 1061 movq(dst, Address(rscratch1,0)); | |
| 1062 } | |
| 1063 } | |
| 1064 } | |
| 1065 | |
| 1066 void MacroAssembler::movptr(ArrayAddress dst, Register src) { | |
| 1067 movq(as_Address(dst), src); | |
| 1068 } | |
| 1069 | |
| 1070 void MacroAssembler::movptr(Register dst, ArrayAddress src) { | |
| 1071 movq(dst, as_Address(src)); | |
| 1072 } | |
| 1073 | |
| 1074 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
| 1075 void MacroAssembler::movptr(Address dst, intptr_t src) { | |
| 1076 mov64(rscratch1, src); | |
| 1077 movq(dst, rscratch1); | |
| 1078 } | |
| 1079 | |
| 1080 // These are mostly for initializing NULL | |
| 1081 void MacroAssembler::movptr(Address dst, int32_t src) { | |
| 1082 movslq(dst, src); | |
| 1083 } | |
| 1084 | |
| 1085 void MacroAssembler::movptr(Register dst, int32_t src) { | |
| 1086 mov64(dst, (intptr_t)src); | |
| 1087 } | |
| 1088 | |
| 1089 void MacroAssembler::pushoop(jobject obj) { | |
| 1090 movoop(rscratch1, obj); | |
| 1091 push(rscratch1); | |
| 1092 } | |
| 1093 | |
| 1094 void MacroAssembler::pushklass(Metadata* obj) { | |
| 1095 mov_metadata(rscratch1, obj); | |
| 1096 push(rscratch1); | |
| 1097 } | |
| 1098 | |
| 1099 void MacroAssembler::pushptr(AddressLiteral src) { | |
| 1100 lea(rscratch1, src); | |
| 1101 if (src.is_lval()) { | |
| 1102 push(rscratch1); | |
| 1103 } else { | |
| 1104 pushq(Address(rscratch1, 0)); | |
| 1105 } | |
| 1106 } | |
| 1107 | |
| 1108 void MacroAssembler::reset_last_Java_frame(bool clear_fp, | |
| 1109 bool clear_pc) { | |
| 1110 // we must set sp to zero to clear frame | |
| 1111 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); | |
| 1112 // must clear fp, so that compiled frames are not confused; it is | |
| 1113 // possible that we need it only for debugging | |
| 1114 if (clear_fp) { | |
| 1115 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); | |
| 1116 } | |
| 1117 | |
| 1118 if (clear_pc) { | |
| 1119 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); | |
| 1120 } | |
| 1121 } | |
| 1122 | |
| 1123 void MacroAssembler::set_last_Java_frame(Register last_java_sp, | |
| 1124 Register last_java_fp, | |
| 1125 address last_java_pc) { | |
| 1126 // determine last_java_sp register | |
| 1127 if (!last_java_sp->is_valid()) { | |
| 1128 last_java_sp = rsp; | |
| 1129 } | |
| 1130 | |
| 1131 // last_java_fp is optional | |
| 1132 if (last_java_fp->is_valid()) { | |
| 1133 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), | |
| 1134 last_java_fp); | |
| 1135 } | |
| 1136 | |
| 1137 // last_java_pc is optional | |
| 1138 if (last_java_pc != NULL) { | |
| 1139 Address java_pc(r15_thread, | |
| 1140 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); | |
| 1141 lea(rscratch1, InternalAddress(last_java_pc)); | |
| 1142 movptr(java_pc, rscratch1); | |
| 1143 } | |
| 1144 | |
| 1145 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp); | |
| 1146 } | |
| 1147 | |
| 1148 static void pass_arg0(MacroAssembler* masm, Register arg) { | |
| 1149 if (c_rarg0 != arg ) { | |
| 1150 masm->mov(c_rarg0, arg); | |
| 1151 } | |
| 1152 } | |
| 1153 | |
| 1154 static void pass_arg1(MacroAssembler* masm, Register arg) { | |
| 1155 if (c_rarg1 != arg ) { | |
| 1156 masm->mov(c_rarg1, arg); | |
| 1157 } | |
| 1158 } | |
| 1159 | |
| 1160 static void pass_arg2(MacroAssembler* masm, Register arg) { | |
| 1161 if (c_rarg2 != arg ) { | |
| 1162 masm->mov(c_rarg2, arg); | |
| 1163 } | |
| 1164 } | |
| 1165 | |
| 1166 static void pass_arg3(MacroAssembler* masm, Register arg) { | |
| 1167 if (c_rarg3 != arg ) { | |
| 1168 masm->mov(c_rarg3, arg); | |
| 1169 } | |
| 1170 } | |
| 1171 | |
| 1172 void MacroAssembler::stop(const char* msg) { | |
| 1173 address rip = pc(); | |
| 1174 pusha(); // get regs on stack | |
| 1175 lea(c_rarg0, ExternalAddress((address) msg)); | |
| 1176 lea(c_rarg1, InternalAddress(rip)); | |
| 1177 movq(c_rarg2, rsp); // pass pointer to regs array | |
| 1178 andq(rsp, -16); // align stack as required by ABI | |
| 1179 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); | |
| 1180 hlt(); | |
| 1181 } | |
| 1182 | |
| 1183 void MacroAssembler::warn(const char* msg) { | |
| 1184 push(rbp); | |
| 1185 movq(rbp, rsp); | |
| 1186 andq(rsp, -16); // align stack as required by push_CPU_state and call | |
| 1187 push_CPU_state(); // keeps alignment at 16 bytes | |
| 1188 lea(c_rarg0, ExternalAddress((address) msg)); | |
| 1189 call_VM_leaf(CAST_FROM_FN_PTR(address, warning), c_rarg0); | |
| 1190 pop_CPU_state(); | |
| 1191 mov(rsp, rbp); | |
| 1192 pop(rbp); | |
| 1193 } | |
| 1194 | |
| 1195 void MacroAssembler::print_state() { | |
| 1196 address rip = pc(); | |
| 1197 pusha(); // get regs on stack | |
| 1198 push(rbp); | |
| 1199 movq(rbp, rsp); | |
| 1200 andq(rsp, -16); // align stack as required by push_CPU_state and call | |
| 1201 push_CPU_state(); // keeps alignment at 16 bytes | |
| 1202 | |
| 1203 lea(c_rarg0, InternalAddress(rip)); | |
| 1204 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array | |
| 1205 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1); | |
| 1206 | |
| 1207 pop_CPU_state(); | |
| 1208 mov(rsp, rbp); | |
| 1209 pop(rbp); | |
| 1210 popa(); | |
| 1211 } | |
| 1212 | |
| 1213 #ifndef PRODUCT | |
| 1214 extern "C" void findpc(intptr_t x); | |
| 1215 #endif | |
| 1216 | |
| 1217 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) { | |
| 1218 // In order to get locks to work, we need to fake a in_VM state | |
| 1219 if (ShowMessageBoxOnError) { | |
| 1220 JavaThread* thread = JavaThread::current(); | |
| 1221 JavaThreadState saved_state = thread->thread_state(); | |
| 1222 thread->set_thread_state(_thread_in_vm); | |
| 1223 #ifndef PRODUCT | |
| 1224 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
| 1225 ttyLocker ttyl; | |
| 1226 BytecodeCounter::print(); | |
| 1227 } | |
| 1228 #endif | |
| 1229 // To see where a verify_oop failed, get $ebx+40/X for this frame. | |
| 1230 // XXX correct this offset for amd64 | |
| 1231 // This is the value of eip which points to where verify_oop will return. | |
| 1232 if (os::message_box(msg, "Execution stopped, print registers?")) { | |
| 1233 print_state64(pc, regs); | |
| 1234 BREAKPOINT; | |
| 1235 assert(false, "start up GDB"); | |
| 1236 } | |
| 1237 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); | |
| 1238 } else { | |
| 1239 ttyLocker ttyl; | |
| 1240 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", | |
| 1241 msg); | |
| 1242 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
| 1243 } | |
| 1244 } | |
| 1245 | |
| 1246 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) { | |
| 1247 ttyLocker ttyl; | |
| 1248 FlagSetting fs(Debugging, true); | |
| 1249 tty->print_cr("rip = 0x%016lx", pc); | |
| 1250 #ifndef PRODUCT | |
| 1251 tty->cr(); | |
| 1252 findpc(pc); | |
| 1253 tty->cr(); | |
| 1254 #endif | |
| 1255 #define PRINT_REG(rax, value) \ | |
| 1256 { tty->print("%s = ", #rax); os::print_location(tty, value); } | |
| 1257 PRINT_REG(rax, regs[15]); | |
| 1258 PRINT_REG(rbx, regs[12]); | |
| 1259 PRINT_REG(rcx, regs[14]); | |
| 1260 PRINT_REG(rdx, regs[13]); | |
| 1261 PRINT_REG(rdi, regs[8]); | |
| 1262 PRINT_REG(rsi, regs[9]); | |
| 1263 PRINT_REG(rbp, regs[10]); | |
| 1264 PRINT_REG(rsp, regs[11]); | |
| 1265 PRINT_REG(r8 , regs[7]); | |
| 1266 PRINT_REG(r9 , regs[6]); | |
| 1267 PRINT_REG(r10, regs[5]); | |
| 1268 PRINT_REG(r11, regs[4]); | |
| 1269 PRINT_REG(r12, regs[3]); | |
| 1270 PRINT_REG(r13, regs[2]); | |
| 1271 PRINT_REG(r14, regs[1]); | |
| 1272 PRINT_REG(r15, regs[0]); | |
| 1273 #undef PRINT_REG | |
| 1274 // Print some words near top of staack. | |
| 1275 int64_t* rsp = (int64_t*) regs[11]; | |
| 1276 int64_t* dump_sp = rsp; | |
| 1277 for (int col1 = 0; col1 < 8; col1++) { | |
| 1278 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); | |
| 1279 os::print_location(tty, *dump_sp++); | |
| 1280 } | |
| 1281 for (int row = 0; row < 25; row++) { | |
| 1282 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); | |
| 1283 for (int col = 0; col < 4; col++) { | |
| 1284 tty->print(" 0x%016lx", *dump_sp++); | |
| 1285 } | |
| 1286 tty->cr(); | |
| 1287 } | |
| 1288 // Print some instructions around pc: | |
| 1289 Disassembler::decode((address)pc-64, (address)pc); | |
| 1290 tty->print_cr("--------"); | |
| 1291 Disassembler::decode((address)pc, (address)pc+32); | |
| 1292 } | |
| 1293 | |
| 1294 #endif // _LP64 | |
| 1295 | |
| 1296 // Now versions that are common to 32/64 bit | |
| 1297 | |
| 1298 void MacroAssembler::addptr(Register dst, int32_t imm32) { | |
| 1299 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32)); | |
| 1300 } | |
| 1301 | |
| 1302 void MacroAssembler::addptr(Register dst, Register src) { | |
| 1303 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); | |
| 1304 } | |
| 1305 | |
| 1306 void MacroAssembler::addptr(Address dst, Register src) { | |
| 1307 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); | |
| 1308 } | |
| 1309 | |
| 1310 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) { | |
| 1311 if (reachable(src)) { | |
| 1312 Assembler::addsd(dst, as_Address(src)); | |
| 1313 } else { | |
| 1314 lea(rscratch1, src); | |
| 1315 Assembler::addsd(dst, Address(rscratch1, 0)); | |
| 1316 } | |
| 1317 } | |
| 1318 | |
| 1319 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) { | |
| 1320 if (reachable(src)) { | |
| 1321 addss(dst, as_Address(src)); | |
| 1322 } else { | |
| 1323 lea(rscratch1, src); | |
| 1324 addss(dst, Address(rscratch1, 0)); | |
| 1325 } | |
| 1326 } | |
| 1327 | |
| 1328 void MacroAssembler::align(int modulus) { | |
| 1329 if (offset() % modulus != 0) { | |
| 1330 nop(modulus - (offset() % modulus)); | |
| 1331 } | |
| 1332 } | |
| 1333 | |
| 1334 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) { | |
| 1335 // Used in sign-masking with aligned address. | |
| 1336 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 1337 if (reachable(src)) { | |
| 1338 Assembler::andpd(dst, as_Address(src)); | |
| 1339 } else { | |
| 1340 lea(rscratch1, src); | |
| 1341 Assembler::andpd(dst, Address(rscratch1, 0)); | |
| 1342 } | |
| 1343 } | |
| 1344 | |
| 1345 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) { | |
| 1346 // Used in sign-masking with aligned address. | |
| 1347 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 1348 if (reachable(src)) { | |
| 1349 Assembler::andps(dst, as_Address(src)); | |
| 1350 } else { | |
| 1351 lea(rscratch1, src); | |
| 1352 Assembler::andps(dst, Address(rscratch1, 0)); | |
| 1353 } | |
| 1354 } | |
| 1355 | |
| 1356 void MacroAssembler::andptr(Register dst, int32_t imm32) { | |
| 1357 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32)); | |
| 1358 } | |
| 1359 | |
| 1360 void MacroAssembler::atomic_incl(AddressLiteral counter_addr) { | |
| 1361 pushf(); | |
| 1362 if (os::is_MP()) | |
| 1363 lock(); | |
| 1364 incrementl(counter_addr); | |
| 1365 popf(); | |
| 1366 } | |
| 1367 | |
| 1368 // Writes to stack successive pages until offset reached to check for | |
| 1369 // stack overflow + shadow pages. This clobbers tmp. | |
| 1370 void MacroAssembler::bang_stack_size(Register size, Register tmp) { | |
| 1371 movptr(tmp, rsp); | |
| 1372 // Bang stack for total size given plus shadow page size. | |
| 1373 // Bang one page at a time because large size can bang beyond yellow and | |
| 1374 // red zones. | |
| 1375 Label loop; | |
| 1376 bind(loop); | |
| 1377 movl(Address(tmp, (-os::vm_page_size())), size ); | |
| 1378 subptr(tmp, os::vm_page_size()); | |
| 1379 subl(size, os::vm_page_size()); | |
| 1380 jcc(Assembler::greater, loop); | |
| 1381 | |
| 1382 // Bang down shadow pages too. | |
| 1383 // The -1 because we already subtracted 1 page. | |
| 1384 for (int i = 0; i< StackShadowPages-1; i++) { | |
| 1385 // this could be any sized move but this is can be a debugging crumb | |
| 1386 // so the bigger the better. | |
| 1387 movptr(Address(tmp, (-i*os::vm_page_size())), size ); | |
| 1388 } | |
| 1389 } | |
| 1390 | |
| 1391 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) { | |
| 1392 assert(UseBiasedLocking, "why call this otherwise?"); | |
| 1393 | |
| 1394 // Check for biased locking unlock case, which is a no-op | |
| 1395 // Note: we do not have to check the thread ID for two reasons. | |
| 1396 // First, the interpreter checks for IllegalMonitorStateException at | |
| 1397 // a higher level. Second, if the bias was revoked while we held the | |
| 1398 // lock, the object could not be rebiased toward another thread, so | |
| 1399 // the bias bit would be clear. | |
| 1400 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); | |
| 1401 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place); | |
| 1402 cmpptr(temp_reg, markOopDesc::biased_lock_pattern); | |
| 1403 jcc(Assembler::equal, done); | |
| 1404 } | |
| 1405 | |
| 1406 void MacroAssembler::c2bool(Register x) { | |
| 1407 // implements x == 0 ? 0 : 1 | |
| 1408 // note: must only look at least-significant byte of x | |
| 1409 // since C-style booleans are stored in one byte | |
| 1410 // only! (was bug) | |
| 1411 andl(x, 0xFF); | |
| 1412 setb(Assembler::notZero, x); | |
| 1413 } | |
| 1414 | |
| 1415 // Wouldn't need if AddressLiteral version had new name | |
| 1416 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) { | |
| 1417 Assembler::call(L, rtype); | |
| 1418 } | |
| 1419 | |
| 1420 void MacroAssembler::call(Register entry) { | |
| 1421 Assembler::call(entry); | |
| 1422 } | |
| 1423 | |
| 1424 void MacroAssembler::call(AddressLiteral entry) { | |
| 1425 if (reachable(entry)) { | |
| 1426 Assembler::call_literal(entry.target(), entry.rspec()); | |
| 1427 } else { | |
| 1428 lea(rscratch1, entry); | |
| 1429 Assembler::call(rscratch1); | |
| 1430 } | |
| 1431 } | |
| 1432 | |
| 1433 void MacroAssembler::ic_call(address entry) { | |
| 1434 RelocationHolder rh = virtual_call_Relocation::spec(pc()); | |
| 1435 movptr(rax, (intptr_t)Universe::non_oop_word()); | |
| 1436 call(AddressLiteral(entry, rh)); | |
| 1437 } | |
| 1438 | |
| 1439 // Implementation of call_VM versions | |
| 1440 | |
| 1441 void MacroAssembler::call_VM(Register oop_result, | |
| 1442 address entry_point, | |
| 1443 bool check_exceptions) { | |
| 1444 Label C, E; | |
| 1445 call(C, relocInfo::none); | |
| 1446 jmp(E); | |
| 1447 | |
| 1448 bind(C); | |
| 1449 call_VM_helper(oop_result, entry_point, 0, check_exceptions); | |
| 1450 ret(0); | |
| 1451 | |
| 1452 bind(E); | |
| 1453 } | |
| 1454 | |
| 1455 void MacroAssembler::call_VM(Register oop_result, | |
| 1456 address entry_point, | |
| 1457 Register arg_1, | |
| 1458 bool check_exceptions) { | |
| 1459 Label C, E; | |
| 1460 call(C, relocInfo::none); | |
| 1461 jmp(E); | |
| 1462 | |
| 1463 bind(C); | |
| 1464 pass_arg1(this, arg_1); | |
| 1465 call_VM_helper(oop_result, entry_point, 1, check_exceptions); | |
| 1466 ret(0); | |
| 1467 | |
| 1468 bind(E); | |
| 1469 } | |
| 1470 | |
| 1471 void MacroAssembler::call_VM(Register oop_result, | |
| 1472 address entry_point, | |
| 1473 Register arg_1, | |
| 1474 Register arg_2, | |
| 1475 bool check_exceptions) { | |
| 1476 Label C, E; | |
| 1477 call(C, relocInfo::none); | |
| 1478 jmp(E); | |
| 1479 | |
| 1480 bind(C); | |
| 1481 | |
| 1482 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1483 | |
| 1484 pass_arg2(this, arg_2); | |
| 1485 pass_arg1(this, arg_1); | |
| 1486 call_VM_helper(oop_result, entry_point, 2, check_exceptions); | |
| 1487 ret(0); | |
| 1488 | |
| 1489 bind(E); | |
| 1490 } | |
| 1491 | |
| 1492 void MacroAssembler::call_VM(Register oop_result, | |
| 1493 address entry_point, | |
| 1494 Register arg_1, | |
| 1495 Register arg_2, | |
| 1496 Register arg_3, | |
| 1497 bool check_exceptions) { | |
| 1498 Label C, E; | |
| 1499 call(C, relocInfo::none); | |
| 1500 jmp(E); | |
| 1501 | |
| 1502 bind(C); | |
| 1503 | |
| 1504 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 1505 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 1506 pass_arg3(this, arg_3); | |
| 1507 | |
| 1508 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1509 pass_arg2(this, arg_2); | |
| 1510 | |
| 1511 pass_arg1(this, arg_1); | |
| 1512 call_VM_helper(oop_result, entry_point, 3, check_exceptions); | |
| 1513 ret(0); | |
| 1514 | |
| 1515 bind(E); | |
| 1516 } | |
| 1517 | |
| 1518 void MacroAssembler::call_VM(Register oop_result, | |
| 1519 Register last_java_sp, | |
| 1520 address entry_point, | |
| 1521 int number_of_arguments, | |
| 1522 bool check_exceptions) { | |
| 1523 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); | |
| 1524 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
| 1525 } | |
| 1526 | |
| 1527 void MacroAssembler::call_VM(Register oop_result, | |
| 1528 Register last_java_sp, | |
| 1529 address entry_point, | |
| 1530 Register arg_1, | |
| 1531 bool check_exceptions) { | |
| 1532 pass_arg1(this, arg_1); | |
| 1533 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
| 1534 } | |
| 1535 | |
| 1536 void MacroAssembler::call_VM(Register oop_result, | |
| 1537 Register last_java_sp, | |
| 1538 address entry_point, | |
| 1539 Register arg_1, | |
| 1540 Register arg_2, | |
| 1541 bool check_exceptions) { | |
| 1542 | |
| 1543 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1544 pass_arg2(this, arg_2); | |
| 1545 pass_arg1(this, arg_1); | |
| 1546 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
| 1547 } | |
| 1548 | |
| 1549 void MacroAssembler::call_VM(Register oop_result, | |
| 1550 Register last_java_sp, | |
| 1551 address entry_point, | |
| 1552 Register arg_1, | |
| 1553 Register arg_2, | |
| 1554 Register arg_3, | |
| 1555 bool check_exceptions) { | |
| 1556 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 1557 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 1558 pass_arg3(this, arg_3); | |
| 1559 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1560 pass_arg2(this, arg_2); | |
| 1561 pass_arg1(this, arg_1); | |
| 1562 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
| 1563 } | |
| 1564 | |
| 1565 void MacroAssembler::super_call_VM(Register oop_result, | |
| 1566 Register last_java_sp, | |
| 1567 address entry_point, | |
| 1568 int number_of_arguments, | |
| 1569 bool check_exceptions) { | |
| 1570 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); | |
| 1571 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
| 1572 } | |
| 1573 | |
| 1574 void MacroAssembler::super_call_VM(Register oop_result, | |
| 1575 Register last_java_sp, | |
| 1576 address entry_point, | |
| 1577 Register arg_1, | |
| 1578 bool check_exceptions) { | |
| 1579 pass_arg1(this, arg_1); | |
| 1580 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
| 1581 } | |
| 1582 | |
| 1583 void MacroAssembler::super_call_VM(Register oop_result, | |
| 1584 Register last_java_sp, | |
| 1585 address entry_point, | |
| 1586 Register arg_1, | |
| 1587 Register arg_2, | |
| 1588 bool check_exceptions) { | |
| 1589 | |
| 1590 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1591 pass_arg2(this, arg_2); | |
| 1592 pass_arg1(this, arg_1); | |
| 1593 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
| 1594 } | |
| 1595 | |
| 1596 void MacroAssembler::super_call_VM(Register oop_result, | |
| 1597 Register last_java_sp, | |
| 1598 address entry_point, | |
| 1599 Register arg_1, | |
| 1600 Register arg_2, | |
| 1601 Register arg_3, | |
| 1602 bool check_exceptions) { | |
| 1603 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 1604 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 1605 pass_arg3(this, arg_3); | |
| 1606 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1607 pass_arg2(this, arg_2); | |
| 1608 pass_arg1(this, arg_1); | |
| 1609 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
| 1610 } | |
| 1611 | |
| 1612 void MacroAssembler::call_VM_base(Register oop_result, | |
| 1613 Register java_thread, | |
| 1614 Register last_java_sp, | |
| 1615 address entry_point, | |
| 1616 int number_of_arguments, | |
| 1617 bool check_exceptions) { | |
| 1618 // determine java_thread register | |
| 1619 if (!java_thread->is_valid()) { | |
| 1620 #ifdef _LP64 | |
| 1621 java_thread = r15_thread; | |
| 1622 #else | |
| 1623 java_thread = rdi; | |
| 1624 get_thread(java_thread); | |
| 1625 #endif // LP64 | |
| 1626 } | |
| 1627 // determine last_java_sp register | |
| 1628 if (!last_java_sp->is_valid()) { | |
| 1629 last_java_sp = rsp; | |
| 1630 } | |
| 1631 // debugging support | |
| 1632 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); | |
| 1633 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register")); | |
| 1634 #ifdef ASSERT | |
| 1635 // TraceBytecodes does not use r12 but saves it over the call, so don't verify | |
| 1636 // r12 is the heapbase. | |
| 1637 LP64_ONLY(if ((UseCompressedOops || UseCompressedKlassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");) | |
| 1638 #endif // ASSERT | |
| 1639 | |
| 1640 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result"); | |
| 1641 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp"); | |
| 1642 | |
| 1643 // push java thread (becomes first argument of C function) | |
| 1644 | |
| 1645 NOT_LP64(push(java_thread); number_of_arguments++); | |
| 1646 LP64_ONLY(mov(c_rarg0, r15_thread)); | |
| 1647 | |
| 1648 // set last Java frame before call | |
| 1649 assert(last_java_sp != rbp, "can't use ebp/rbp"); | |
| 1650 | |
| 1651 // Only interpreter should have to set fp | |
| 1652 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL); | |
| 1653 | |
| 1654 // do the call, remove parameters | |
| 1655 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
| 1656 | |
| 1657 // restore the thread (cannot use the pushed argument since arguments | |
| 1658 // may be overwritten by C code generated by an optimizing compiler); | |
| 1659 // however can use the register value directly if it is callee saved. | |
| 1660 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) { | |
| 1661 // rdi & rsi (also r15) are callee saved -> nothing to do | |
| 1662 #ifdef ASSERT | |
| 1663 guarantee(java_thread != rax, "change this code"); | |
| 1664 push(rax); | |
| 1665 { Label L; | |
| 1666 get_thread(rax); | |
| 1667 cmpptr(java_thread, rax); | |
| 1668 jcc(Assembler::equal, L); | |
| 1669 STOP("MacroAssembler::call_VM_base: rdi not callee saved?"); | |
| 1670 bind(L); | |
| 1671 } | |
| 1672 pop(rax); | |
| 1673 #endif | |
| 1674 } else { | |
| 1675 get_thread(java_thread); | |
| 1676 } | |
| 1677 // reset last Java frame | |
| 1678 // Only interpreter should have to clear fp | |
| 1679 reset_last_Java_frame(java_thread, true, false); | |
| 1680 | |
| 1681 #ifndef CC_INTERP | |
| 1682 // C++ interp handles this in the interpreter | |
| 1683 check_and_handle_popframe(java_thread); | |
| 1684 check_and_handle_earlyret(java_thread); | |
| 1685 #endif /* CC_INTERP */ | |
| 1686 | |
| 1687 if (check_exceptions) { | |
| 1688 // check for pending exceptions (java_thread is set upon return) | |
| 1689 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); | |
| 1690 #ifndef _LP64 | |
| 1691 jump_cc(Assembler::notEqual, | |
| 1692 RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 1693 #else | |
| 1694 // This used to conditionally jump to forward_exception however it is | |
| 1695 // possible if we relocate that the branch will not reach. So we must jump | |
| 1696 // around so we can always reach | |
| 1697 | |
| 1698 Label ok; | |
| 1699 jcc(Assembler::equal, ok); | |
| 1700 jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 1701 bind(ok); | |
| 1702 #endif // LP64 | |
| 1703 } | |
| 1704 | |
| 1705 // get oop result if there is one and reset the value in the thread | |
| 1706 if (oop_result->is_valid()) { | |
| 1707 get_vm_result(oop_result, java_thread); | |
| 1708 } | |
| 1709 } | |
| 1710 | |
| 1711 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { | |
| 1712 | |
| 1713 // Calculate the value for last_Java_sp | |
| 1714 // somewhat subtle. call_VM does an intermediate call | |
| 1715 // which places a return address on the stack just under the | |
| 1716 // stack pointer as the user finsihed with it. This allows | |
| 1717 // use to retrieve last_Java_pc from last_Java_sp[-1]. | |
| 1718 // On 32bit we then have to push additional args on the stack to accomplish | |
| 1719 // the actual requested call. On 64bit call_VM only can use register args | |
| 1720 // so the only extra space is the return address that call_VM created. | |
| 1721 // This hopefully explains the calculations here. | |
| 1722 | |
| 1723 #ifdef _LP64 | |
| 1724 // We've pushed one address, correct last_Java_sp | |
| 1725 lea(rax, Address(rsp, wordSize)); | |
| 1726 #else | |
| 1727 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize)); | |
| 1728 #endif // LP64 | |
| 1729 | |
| 1730 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions); | |
| 1731 | |
| 1732 } | |
| 1733 | |
| 1734 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) { | |
| 1735 call_VM_leaf_base(entry_point, number_of_arguments); | |
| 1736 } | |
| 1737 | |
| 1738 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) { | |
| 1739 pass_arg0(this, arg_0); | |
| 1740 call_VM_leaf(entry_point, 1); | |
| 1741 } | |
| 1742 | |
| 1743 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { | |
| 1744 | |
| 1745 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 1746 pass_arg1(this, arg_1); | |
| 1747 pass_arg0(this, arg_0); | |
| 1748 call_VM_leaf(entry_point, 2); | |
| 1749 } | |
| 1750 | |
| 1751 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { | |
| 1752 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
| 1753 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1754 pass_arg2(this, arg_2); | |
| 1755 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 1756 pass_arg1(this, arg_1); | |
| 1757 pass_arg0(this, arg_0); | |
| 1758 call_VM_leaf(entry_point, 3); | |
| 1759 } | |
| 1760 | |
| 1761 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) { | |
| 1762 pass_arg0(this, arg_0); | |
| 1763 MacroAssembler::call_VM_leaf_base(entry_point, 1); | |
| 1764 } | |
| 1765 | |
| 1766 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { | |
| 1767 | |
| 1768 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 1769 pass_arg1(this, arg_1); | |
| 1770 pass_arg0(this, arg_0); | |
| 1771 MacroAssembler::call_VM_leaf_base(entry_point, 2); | |
| 1772 } | |
| 1773 | |
| 1774 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { | |
| 1775 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
| 1776 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1777 pass_arg2(this, arg_2); | |
| 1778 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 1779 pass_arg1(this, arg_1); | |
| 1780 pass_arg0(this, arg_0); | |
| 1781 MacroAssembler::call_VM_leaf_base(entry_point, 3); | |
| 1782 } | |
| 1783 | |
| 1784 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) { | |
| 1785 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg")); | |
| 1786 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
| 1787 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
| 1788 pass_arg3(this, arg_3); | |
| 1789 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
| 1790 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
| 1791 pass_arg2(this, arg_2); | |
| 1792 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
| 1793 pass_arg1(this, arg_1); | |
| 1794 pass_arg0(this, arg_0); | |
| 1795 MacroAssembler::call_VM_leaf_base(entry_point, 4); | |
| 1796 } | |
| 1797 | |
| 1798 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) { | |
| 1799 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset())); | |
| 1800 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD); | |
| 1801 verify_oop(oop_result, "broken oop in call_VM_base"); | |
| 1802 } | |
| 1803 | |
| 1804 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) { | |
| 1805 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset())); | |
| 1806 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD); | |
| 1807 } | |
| 1808 | |
| 1809 void MacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
| 1810 } | |
| 1811 | |
| 1812 void MacroAssembler::check_and_handle_popframe(Register java_thread) { | |
| 1813 } | |
| 1814 | |
| 1815 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) { | |
| 1816 if (reachable(src1)) { | |
| 1817 cmpl(as_Address(src1), imm); | |
| 1818 } else { | |
| 1819 lea(rscratch1, src1); | |
| 1820 cmpl(Address(rscratch1, 0), imm); | |
| 1821 } | |
| 1822 } | |
| 1823 | |
| 1824 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) { | |
| 1825 assert(!src2.is_lval(), "use cmpptr"); | |
| 1826 if (reachable(src2)) { | |
| 1827 cmpl(src1, as_Address(src2)); | |
| 1828 } else { | |
| 1829 lea(rscratch1, src2); | |
| 1830 cmpl(src1, Address(rscratch1, 0)); | |
| 1831 } | |
| 1832 } | |
| 1833 | |
| 1834 void MacroAssembler::cmp32(Register src1, int32_t imm) { | |
| 1835 Assembler::cmpl(src1, imm); | |
| 1836 } | |
| 1837 | |
| 1838 void MacroAssembler::cmp32(Register src1, Address src2) { | |
| 1839 Assembler::cmpl(src1, src2); | |
| 1840 } | |
| 1841 | |
| 1842 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { | |
| 1843 ucomisd(opr1, opr2); | |
| 1844 | |
| 1845 Label L; | |
| 1846 if (unordered_is_less) { | |
| 1847 movl(dst, -1); | |
| 1848 jcc(Assembler::parity, L); | |
| 1849 jcc(Assembler::below , L); | |
| 1850 movl(dst, 0); | |
| 1851 jcc(Assembler::equal , L); | |
| 1852 increment(dst); | |
| 1853 } else { // unordered is greater | |
| 1854 movl(dst, 1); | |
| 1855 jcc(Assembler::parity, L); | |
| 1856 jcc(Assembler::above , L); | |
| 1857 movl(dst, 0); | |
| 1858 jcc(Assembler::equal , L); | |
| 1859 decrementl(dst); | |
| 1860 } | |
| 1861 bind(L); | |
| 1862 } | |
| 1863 | |
| 1864 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { | |
| 1865 ucomiss(opr1, opr2); | |
| 1866 | |
| 1867 Label L; | |
| 1868 if (unordered_is_less) { | |
| 1869 movl(dst, -1); | |
| 1870 jcc(Assembler::parity, L); | |
| 1871 jcc(Assembler::below , L); | |
| 1872 movl(dst, 0); | |
| 1873 jcc(Assembler::equal , L); | |
| 1874 increment(dst); | |
| 1875 } else { // unordered is greater | |
| 1876 movl(dst, 1); | |
| 1877 jcc(Assembler::parity, L); | |
| 1878 jcc(Assembler::above , L); | |
| 1879 movl(dst, 0); | |
| 1880 jcc(Assembler::equal , L); | |
| 1881 decrementl(dst); | |
| 1882 } | |
| 1883 bind(L); | |
| 1884 } | |
| 1885 | |
| 1886 | |
| 1887 void MacroAssembler::cmp8(AddressLiteral src1, int imm) { | |
| 1888 if (reachable(src1)) { | |
| 1889 cmpb(as_Address(src1), imm); | |
| 1890 } else { | |
| 1891 lea(rscratch1, src1); | |
| 1892 cmpb(Address(rscratch1, 0), imm); | |
| 1893 } | |
| 1894 } | |
| 1895 | |
| 1896 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) { | |
| 1897 #ifdef _LP64 | |
| 1898 if (src2.is_lval()) { | |
| 1899 movptr(rscratch1, src2); | |
| 1900 Assembler::cmpq(src1, rscratch1); | |
| 1901 } else if (reachable(src2)) { | |
| 1902 cmpq(src1, as_Address(src2)); | |
| 1903 } else { | |
| 1904 lea(rscratch1, src2); | |
| 1905 Assembler::cmpq(src1, Address(rscratch1, 0)); | |
| 1906 } | |
| 1907 #else | |
| 1908 if (src2.is_lval()) { | |
| 1909 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); | |
| 1910 } else { | |
| 1911 cmpl(src1, as_Address(src2)); | |
| 1912 } | |
| 1913 #endif // _LP64 | |
| 1914 } | |
| 1915 | |
| 1916 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) { | |
| 1917 assert(src2.is_lval(), "not a mem-mem compare"); | |
| 1918 #ifdef _LP64 | |
| 1919 // moves src2's literal address | |
| 1920 movptr(rscratch1, src2); | |
| 1921 Assembler::cmpq(src1, rscratch1); | |
| 1922 #else | |
| 1923 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); | |
| 1924 #endif // _LP64 | |
| 1925 } | |
| 1926 | |
| 1927 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) { | |
| 1928 if (reachable(adr)) { | |
| 1929 if (os::is_MP()) | |
| 1930 lock(); | |
| 1931 cmpxchgptr(reg, as_Address(adr)); | |
| 1932 } else { | |
| 1933 lea(rscratch1, adr); | |
| 1934 if (os::is_MP()) | |
| 1935 lock(); | |
| 1936 cmpxchgptr(reg, Address(rscratch1, 0)); | |
| 1937 } | |
| 1938 } | |
| 1939 | |
| 1940 void MacroAssembler::cmpxchgptr(Register reg, Address adr) { | |
| 1941 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr)); | |
| 1942 } | |
| 1943 | |
| 1944 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) { | |
| 1945 if (reachable(src)) { | |
| 1946 Assembler::comisd(dst, as_Address(src)); | |
| 1947 } else { | |
| 1948 lea(rscratch1, src); | |
| 1949 Assembler::comisd(dst, Address(rscratch1, 0)); | |
| 1950 } | |
| 1951 } | |
| 1952 | |
| 1953 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) { | |
| 1954 if (reachable(src)) { | |
| 1955 Assembler::comiss(dst, as_Address(src)); | |
| 1956 } else { | |
| 1957 lea(rscratch1, src); | |
| 1958 Assembler::comiss(dst, Address(rscratch1, 0)); | |
| 1959 } | |
| 1960 } | |
| 1961 | |
| 1962 | |
| 1963 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) { | |
| 1964 Condition negated_cond = negate_condition(cond); | |
| 1965 Label L; | |
| 1966 jcc(negated_cond, L); | |
| 1967 atomic_incl(counter_addr); | |
| 1968 bind(L); | |
| 1969 } | |
| 1970 | |
| 1971 int MacroAssembler::corrected_idivl(Register reg) { | |
| 1972 // Full implementation of Java idiv and irem; checks for | |
| 1973 // special case as described in JVM spec., p.243 & p.271. | |
| 1974 // The function returns the (pc) offset of the idivl | |
| 1975 // instruction - may be needed for implicit exceptions. | |
| 1976 // | |
| 1977 // normal case special case | |
| 1978 // | |
| 1979 // input : rax,: dividend min_int | |
| 1980 // reg: divisor (may not be rax,/rdx) -1 | |
| 1981 // | |
| 1982 // output: rax,: quotient (= rax, idiv reg) min_int | |
| 1983 // rdx: remainder (= rax, irem reg) 0 | |
| 1984 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register"); | |
| 1985 const int min_int = 0x80000000; | |
| 1986 Label normal_case, special_case; | |
| 1987 | |
| 1988 // check for special case | |
| 1989 cmpl(rax, min_int); | |
| 1990 jcc(Assembler::notEqual, normal_case); | |
| 1991 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0) | |
| 1992 cmpl(reg, -1); | |
| 1993 jcc(Assembler::equal, special_case); | |
| 1994 | |
| 1995 // handle normal case | |
| 1996 bind(normal_case); | |
| 1997 cdql(); | |
| 1998 int idivl_offset = offset(); | |
| 1999 idivl(reg); | |
| 2000 | |
| 2001 // normal and special case exit | |
| 2002 bind(special_case); | |
| 2003 | |
| 2004 return idivl_offset; | |
| 2005 } | |
| 2006 | |
| 2007 | |
| 2008 | |
| 2009 void MacroAssembler::decrementl(Register reg, int value) { | |
| 2010 if (value == min_jint) {subl(reg, value) ; return; } | |
| 2011 if (value < 0) { incrementl(reg, -value); return; } | |
| 2012 if (value == 0) { ; return; } | |
| 2013 if (value == 1 && UseIncDec) { decl(reg) ; return; } | |
| 2014 /* else */ { subl(reg, value) ; return; } | |
| 2015 } | |
| 2016 | |
| 2017 void MacroAssembler::decrementl(Address dst, int value) { | |
| 2018 if (value == min_jint) {subl(dst, value) ; return; } | |
| 2019 if (value < 0) { incrementl(dst, -value); return; } | |
| 2020 if (value == 0) { ; return; } | |
| 2021 if (value == 1 && UseIncDec) { decl(dst) ; return; } | |
| 2022 /* else */ { subl(dst, value) ; return; } | |
| 2023 } | |
| 2024 | |
| 2025 void MacroAssembler::division_with_shift (Register reg, int shift_value) { | |
| 2026 assert (shift_value > 0, "illegal shift value"); | |
| 2027 Label _is_positive; | |
| 2028 testl (reg, reg); | |
| 2029 jcc (Assembler::positive, _is_positive); | |
| 2030 int offset = (1 << shift_value) - 1 ; | |
| 2031 | |
| 2032 if (offset == 1) { | |
| 2033 incrementl(reg); | |
| 2034 } else { | |
| 2035 addl(reg, offset); | |
| 2036 } | |
| 2037 | |
| 2038 bind (_is_positive); | |
| 2039 sarl(reg, shift_value); | |
| 2040 } | |
| 2041 | |
| 2042 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) { | |
| 2043 if (reachable(src)) { | |
| 2044 Assembler::divsd(dst, as_Address(src)); | |
| 2045 } else { | |
| 2046 lea(rscratch1, src); | |
| 2047 Assembler::divsd(dst, Address(rscratch1, 0)); | |
| 2048 } | |
| 2049 } | |
| 2050 | |
| 2051 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) { | |
| 2052 if (reachable(src)) { | |
| 2053 Assembler::divss(dst, as_Address(src)); | |
| 2054 } else { | |
| 2055 lea(rscratch1, src); | |
| 2056 Assembler::divss(dst, Address(rscratch1, 0)); | |
| 2057 } | |
| 2058 } | |
| 2059 | |
| 2060 // !defined(COMPILER2) is because of stupid core builds | |
| 2061 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) | |
| 2062 void MacroAssembler::empty_FPU_stack() { | |
| 2063 if (VM_Version::supports_mmx()) { | |
| 2064 emms(); | |
| 2065 } else { | |
| 2066 for (int i = 8; i-- > 0; ) ffree(i); | |
| 2067 } | |
| 2068 } | |
| 2069 #endif // !LP64 || C1 || !C2 | |
| 2070 | |
| 2071 | |
| 2072 // Defines obj, preserves var_size_in_bytes | |
| 2073 void MacroAssembler::eden_allocate(Register obj, | |
| 2074 Register var_size_in_bytes, | |
| 2075 int con_size_in_bytes, | |
| 2076 Register t1, | |
| 2077 Label& slow_case) { | |
| 2078 assert(obj == rax, "obj must be in rax, for cmpxchg"); | |
| 2079 assert_different_registers(obj, var_size_in_bytes, t1); | |
| 2080 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
| 2081 jmp(slow_case); | |
| 2082 } else { | |
| 2083 Register end = t1; | |
| 2084 Label retry; | |
| 2085 bind(retry); | |
| 2086 ExternalAddress heap_top((address) Universe::heap()->top_addr()); | |
| 2087 movptr(obj, heap_top); | |
| 2088 if (var_size_in_bytes == noreg) { | |
| 2089 lea(end, Address(obj, con_size_in_bytes)); | |
| 2090 } else { | |
| 2091 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); | |
| 2092 } | |
| 2093 // if end < obj then we wrapped around => object too long => slow case | |
| 2094 cmpptr(end, obj); | |
| 2095 jcc(Assembler::below, slow_case); | |
| 2096 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr())); | |
| 2097 jcc(Assembler::above, slow_case); | |
| 2098 // Compare obj with the top addr, and if still equal, store the new top addr in | |
| 2099 // end at the address of the top addr pointer. Sets ZF if was equal, and clears | |
| 2100 // it otherwise. Use lock prefix for atomicity on MPs. | |
| 2101 locked_cmpxchgptr(end, heap_top); | |
| 2102 jcc(Assembler::notEqual, retry); | |
| 2103 } | |
| 2104 } | |
| 2105 | |
| 2106 void MacroAssembler::enter() { | |
| 2107 push(rbp); | |
| 2108 mov(rbp, rsp); | |
| 2109 } | |
| 2110 | |
| 2111 // A 5 byte nop that is safe for patching (see patch_verified_entry) | |
| 2112 void MacroAssembler::fat_nop() { | |
| 2113 if (UseAddressNop) { | |
| 2114 addr_nop_5(); | |
| 2115 } else { | |
|
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2116 emit_int8(0x26); // es: |
|
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2117 emit_int8(0x2e); // cs: |
|
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2118 emit_int8(0x64); // fs: |
|
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2119 emit_int8(0x65); // gs: |
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|
2120 emit_int8((unsigned char)0x90); |
| 7199 | 2121 } |
| 2122 } | |
| 2123 | |
| 2124 void MacroAssembler::fcmp(Register tmp) { | |
| 2125 fcmp(tmp, 1, true, true); | |
| 2126 } | |
| 2127 | |
| 2128 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) { | |
| 2129 assert(!pop_right || pop_left, "usage error"); | |
| 2130 if (VM_Version::supports_cmov()) { | |
| 2131 assert(tmp == noreg, "unneeded temp"); | |
| 2132 if (pop_left) { | |
| 2133 fucomip(index); | |
| 2134 } else { | |
| 2135 fucomi(index); | |
| 2136 } | |
| 2137 if (pop_right) { | |
| 2138 fpop(); | |
| 2139 } | |
| 2140 } else { | |
| 2141 assert(tmp != noreg, "need temp"); | |
| 2142 if (pop_left) { | |
| 2143 if (pop_right) { | |
| 2144 fcompp(); | |
| 2145 } else { | |
| 2146 fcomp(index); | |
| 2147 } | |
| 2148 } else { | |
| 2149 fcom(index); | |
| 2150 } | |
| 2151 // convert FPU condition into eflags condition via rax, | |
| 2152 save_rax(tmp); | |
| 2153 fwait(); fnstsw_ax(); | |
| 2154 sahf(); | |
| 2155 restore_rax(tmp); | |
| 2156 } | |
| 2157 // condition codes set as follows: | |
| 2158 // | |
| 2159 // CF (corresponds to C0) if x < y | |
| 2160 // PF (corresponds to C2) if unordered | |
| 2161 // ZF (corresponds to C3) if x = y | |
| 2162 } | |
| 2163 | |
| 2164 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) { | |
| 2165 fcmp2int(dst, unordered_is_less, 1, true, true); | |
| 2166 } | |
| 2167 | |
| 2168 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) { | |
| 2169 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right); | |
| 2170 Label L; | |
| 2171 if (unordered_is_less) { | |
| 2172 movl(dst, -1); | |
| 2173 jcc(Assembler::parity, L); | |
| 2174 jcc(Assembler::below , L); | |
| 2175 movl(dst, 0); | |
| 2176 jcc(Assembler::equal , L); | |
| 2177 increment(dst); | |
| 2178 } else { // unordered is greater | |
| 2179 movl(dst, 1); | |
| 2180 jcc(Assembler::parity, L); | |
| 2181 jcc(Assembler::above , L); | |
| 2182 movl(dst, 0); | |
| 2183 jcc(Assembler::equal , L); | |
| 2184 decrementl(dst); | |
| 2185 } | |
| 2186 bind(L); | |
| 2187 } | |
| 2188 | |
| 2189 void MacroAssembler::fld_d(AddressLiteral src) { | |
| 2190 fld_d(as_Address(src)); | |
| 2191 } | |
| 2192 | |
| 2193 void MacroAssembler::fld_s(AddressLiteral src) { | |
| 2194 fld_s(as_Address(src)); | |
| 2195 } | |
| 2196 | |
| 2197 void MacroAssembler::fld_x(AddressLiteral src) { | |
| 2198 Assembler::fld_x(as_Address(src)); | |
| 2199 } | |
| 2200 | |
| 2201 void MacroAssembler::fldcw(AddressLiteral src) { | |
| 2202 Assembler::fldcw(as_Address(src)); | |
| 2203 } | |
| 2204 | |
| 2205 void MacroAssembler::pow_exp_core_encoding() { | |
| 2206 // kills rax, rcx, rdx | |
| 2207 subptr(rsp,sizeof(jdouble)); | |
| 2208 // computes 2^X. Stack: X ... | |
| 2209 // f2xm1 computes 2^X-1 but only operates on -1<=X<=1. Get int(X) and | |
| 2210 // keep it on the thread's stack to compute 2^int(X) later | |
| 2211 // then compute 2^(X-int(X)) as (2^(X-int(X)-1+1) | |
| 2212 // final result is obtained with: 2^X = 2^int(X) * 2^(X-int(X)) | |
| 2213 fld_s(0); // Stack: X X ... | |
| 2214 frndint(); // Stack: int(X) X ... | |
| 2215 fsuba(1); // Stack: int(X) X-int(X) ... | |
| 2216 fistp_s(Address(rsp,0)); // move int(X) as integer to thread's stack. Stack: X-int(X) ... | |
| 2217 f2xm1(); // Stack: 2^(X-int(X))-1 ... | |
| 2218 fld1(); // Stack: 1 2^(X-int(X))-1 ... | |
| 2219 faddp(1); // Stack: 2^(X-int(X)) | |
| 2220 // computes 2^(int(X)): add exponent bias (1023) to int(X), then | |
| 2221 // shift int(X)+1023 to exponent position. | |
| 2222 // Exponent is limited to 11 bits if int(X)+1023 does not fit in 11 | |
| 2223 // bits, set result to NaN. 0x000 and 0x7FF are reserved exponent | |
| 2224 // values so detect them and set result to NaN. | |
| 2225 movl(rax,Address(rsp,0)); | |
| 2226 movl(rcx, -2048); // 11 bit mask and valid NaN binary encoding | |
| 2227 addl(rax, 1023); | |
| 2228 movl(rdx,rax); | |
| 2229 shll(rax,20); | |
| 2230 // Check that 0 < int(X)+1023 < 2047. Otherwise set rax to NaN. | |
| 2231 addl(rdx,1); | |
| 2232 // Check that 1 < int(X)+1023+1 < 2048 | |
| 2233 // in 3 steps: | |
| 2234 // 1- (int(X)+1023+1)&-2048 == 0 => 0 <= int(X)+1023+1 < 2048 | |
| 2235 // 2- (int(X)+1023+1)&-2048 != 0 | |
| 2236 // 3- (int(X)+1023+1)&-2048 != 1 | |
| 2237 // Do 2- first because addl just updated the flags. | |
| 2238 cmov32(Assembler::equal,rax,rcx); | |
| 2239 cmpl(rdx,1); | |
| 2240 cmov32(Assembler::equal,rax,rcx); | |
| 2241 testl(rdx,rcx); | |
| 2242 cmov32(Assembler::notEqual,rax,rcx); | |
| 2243 movl(Address(rsp,4),rax); | |
| 2244 movl(Address(rsp,0),0); | |
| 2245 fmul_d(Address(rsp,0)); // Stack: 2^X ... | |
| 2246 addptr(rsp,sizeof(jdouble)); | |
| 2247 } | |
| 2248 | |
| 2249 void MacroAssembler::increase_precision() { | |
| 2250 subptr(rsp, BytesPerWord); | |
| 2251 fnstcw(Address(rsp, 0)); | |
| 2252 movl(rax, Address(rsp, 0)); | |
| 2253 orl(rax, 0x300); | |
| 2254 push(rax); | |
| 2255 fldcw(Address(rsp, 0)); | |
| 2256 pop(rax); | |
| 2257 } | |
| 2258 | |
| 2259 void MacroAssembler::restore_precision() { | |
| 2260 fldcw(Address(rsp, 0)); | |
| 2261 addptr(rsp, BytesPerWord); | |
| 2262 } | |
| 2263 | |
| 2264 void MacroAssembler::fast_pow() { | |
| 2265 // computes X^Y = 2^(Y * log2(X)) | |
| 2266 // if fast computation is not possible, result is NaN. Requires | |
| 2267 // fallback from user of this macro. | |
| 2268 // increase precision for intermediate steps of the computation | |
| 2269 increase_precision(); | |
| 2270 fyl2x(); // Stack: (Y*log2(X)) ... | |
| 2271 pow_exp_core_encoding(); // Stack: exp(X) ... | |
| 2272 restore_precision(); | |
| 2273 } | |
| 2274 | |
| 2275 void MacroAssembler::fast_exp() { | |
| 2276 // computes exp(X) = 2^(X * log2(e)) | |
| 2277 // if fast computation is not possible, result is NaN. Requires | |
| 2278 // fallback from user of this macro. | |
| 2279 // increase precision for intermediate steps of the computation | |
| 2280 increase_precision(); | |
| 2281 fldl2e(); // Stack: log2(e) X ... | |
| 2282 fmulp(1); // Stack: (X*log2(e)) ... | |
| 2283 pow_exp_core_encoding(); // Stack: exp(X) ... | |
| 2284 restore_precision(); | |
| 2285 } | |
| 2286 | |
| 2287 void MacroAssembler::pow_or_exp(bool is_exp, int num_fpu_regs_in_use) { | |
| 2288 // kills rax, rcx, rdx | |
| 2289 // pow and exp needs 2 extra registers on the fpu stack. | |
| 2290 Label slow_case, done; | |
| 2291 Register tmp = noreg; | |
| 2292 if (!VM_Version::supports_cmov()) { | |
| 2293 // fcmp needs a temporary so preserve rdx, | |
| 2294 tmp = rdx; | |
| 2295 } | |
| 2296 Register tmp2 = rax; | |
| 2297 Register tmp3 = rcx; | |
| 2298 | |
| 2299 if (is_exp) { | |
| 2300 // Stack: X | |
| 2301 fld_s(0); // duplicate argument for runtime call. Stack: X X | |
| 2302 fast_exp(); // Stack: exp(X) X | |
| 2303 fcmp(tmp, 0, false, false); // Stack: exp(X) X | |
| 2304 // exp(X) not equal to itself: exp(X) is NaN go to slow case. | |
| 2305 jcc(Assembler::parity, slow_case); | |
| 2306 // get rid of duplicate argument. Stack: exp(X) | |
| 2307 if (num_fpu_regs_in_use > 0) { | |
| 2308 fxch(); | |
| 2309 fpop(); | |
| 2310 } else { | |
| 2311 ffree(1); | |
| 2312 } | |
| 2313 jmp(done); | |
| 2314 } else { | |
| 2315 // Stack: X Y | |
| 2316 Label x_negative, y_odd; | |
| 2317 | |
| 2318 fldz(); // Stack: 0 X Y | |
| 2319 fcmp(tmp, 1, true, false); // Stack: X Y | |
| 2320 jcc(Assembler::above, x_negative); | |
| 2321 | |
| 2322 // X >= 0 | |
| 2323 | |
| 2324 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y | |
| 2325 fld_s(1); // Stack: X Y X Y | |
| 2326 fast_pow(); // Stack: X^Y X Y | |
| 2327 fcmp(tmp, 0, false, false); // Stack: X^Y X Y | |
| 2328 // X^Y not equal to itself: X^Y is NaN go to slow case. | |
| 2329 jcc(Assembler::parity, slow_case); | |
| 2330 // get rid of duplicate arguments. Stack: X^Y | |
| 2331 if (num_fpu_regs_in_use > 0) { | |
| 2332 fxch(); fpop(); | |
| 2333 fxch(); fpop(); | |
| 2334 } else { | |
| 2335 ffree(2); | |
| 2336 ffree(1); | |
| 2337 } | |
| 2338 jmp(done); | |
| 2339 | |
| 2340 // X <= 0 | |
| 2341 bind(x_negative); | |
| 2342 | |
| 2343 fld_s(1); // Stack: Y X Y | |
| 2344 frndint(); // Stack: int(Y) X Y | |
| 2345 fcmp(tmp, 2, false, false); // Stack: int(Y) X Y | |
| 2346 jcc(Assembler::notEqual, slow_case); | |
| 2347 | |
| 2348 subptr(rsp, 8); | |
| 2349 | |
| 2350 // For X^Y, when X < 0, Y has to be an integer and the final | |
| 2351 // result depends on whether it's odd or even. We just checked | |
| 2352 // that int(Y) == Y. We move int(Y) to gp registers as a 64 bit | |
| 2353 // integer to test its parity. If int(Y) is huge and doesn't fit | |
| 2354 // in the 64 bit integer range, the integer indefinite value will | |
| 2355 // end up in the gp registers. Huge numbers are all even, the | |
| 2356 // integer indefinite number is even so it's fine. | |
| 2357 | |
| 2358 #ifdef ASSERT | |
| 2359 // Let's check we don't end up with an integer indefinite number | |
| 2360 // when not expected. First test for huge numbers: check whether | |
| 2361 // int(Y)+1 == int(Y) which is true for very large numbers and | |
| 2362 // those are all even. A 64 bit integer is guaranteed to not | |
| 2363 // overflow for numbers where y+1 != y (when precision is set to | |
| 2364 // double precision). | |
| 2365 Label y_not_huge; | |
| 2366 | |
| 2367 fld1(); // Stack: 1 int(Y) X Y | |
| 2368 fadd(1); // Stack: 1+int(Y) int(Y) X Y | |
| 2369 | |
| 2370 #ifdef _LP64 | |
| 2371 // trip to memory to force the precision down from double extended | |
| 2372 // precision | |
| 2373 fstp_d(Address(rsp, 0)); | |
| 2374 fld_d(Address(rsp, 0)); | |
| 2375 #endif | |
| 2376 | |
| 2377 fcmp(tmp, 1, true, false); // Stack: int(Y) X Y | |
| 2378 #endif | |
| 2379 | |
| 2380 // move int(Y) as 64 bit integer to thread's stack | |
| 2381 fistp_d(Address(rsp,0)); // Stack: X Y | |
| 2382 | |
| 2383 #ifdef ASSERT | |
| 2384 jcc(Assembler::notEqual, y_not_huge); | |
| 2385 | |
| 2386 // Y is huge so we know it's even. It may not fit in a 64 bit | |
| 2387 // integer and we don't want the debug code below to see the | |
| 2388 // integer indefinite value so overwrite int(Y) on the thread's | |
| 2389 // stack with 0. | |
| 2390 movl(Address(rsp, 0), 0); | |
| 2391 movl(Address(rsp, 4), 0); | |
| 2392 | |
| 2393 bind(y_not_huge); | |
| 2394 #endif | |
| 2395 | |
| 2396 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y | |
| 2397 fld_s(1); // Stack: X Y X Y | |
| 2398 fabs(); // Stack: abs(X) Y X Y | |
| 2399 fast_pow(); // Stack: abs(X)^Y X Y | |
| 2400 fcmp(tmp, 0, false, false); // Stack: abs(X)^Y X Y | |
| 2401 // abs(X)^Y not equal to itself: abs(X)^Y is NaN go to slow case. | |
| 2402 | |
| 2403 pop(tmp2); | |
| 2404 NOT_LP64(pop(tmp3)); | |
| 2405 jcc(Assembler::parity, slow_case); | |
| 2406 | |
| 2407 #ifdef ASSERT | |
| 2408 // Check that int(Y) is not integer indefinite value (int | |
| 2409 // overflow). Shouldn't happen because for values that would | |
| 2410 // overflow, 1+int(Y)==Y which was tested earlier. | |
| 2411 #ifndef _LP64 | |
| 2412 { | |
| 2413 Label integer; | |
| 2414 testl(tmp2, tmp2); | |
| 2415 jcc(Assembler::notZero, integer); | |
| 2416 cmpl(tmp3, 0x80000000); | |
| 2417 jcc(Assembler::notZero, integer); | |
| 2418 STOP("integer indefinite value shouldn't be seen here"); | |
| 2419 bind(integer); | |
| 2420 } | |
| 2421 #else | |
| 2422 { | |
| 2423 Label integer; | |
| 2424 mov(tmp3, tmp2); // preserve tmp2 for parity check below | |
| 2425 shlq(tmp3, 1); | |
| 2426 jcc(Assembler::carryClear, integer); | |
| 2427 jcc(Assembler::notZero, integer); | |
| 2428 STOP("integer indefinite value shouldn't be seen here"); | |
| 2429 bind(integer); | |
| 2430 } | |
| 2431 #endif | |
| 2432 #endif | |
| 2433 | |
| 2434 // get rid of duplicate arguments. Stack: X^Y | |
| 2435 if (num_fpu_regs_in_use > 0) { | |
| 2436 fxch(); fpop(); | |
| 2437 fxch(); fpop(); | |
| 2438 } else { | |
| 2439 ffree(2); | |
| 2440 ffree(1); | |
| 2441 } | |
| 2442 | |
| 2443 testl(tmp2, 1); | |
| 2444 jcc(Assembler::zero, done); // X <= 0, Y even: X^Y = abs(X)^Y | |
| 2445 // X <= 0, Y even: X^Y = -abs(X)^Y | |
| 2446 | |
| 2447 fchs(); // Stack: -abs(X)^Y Y | |
| 2448 jmp(done); | |
| 2449 } | |
| 2450 | |
| 2451 // slow case: runtime call | |
| 2452 bind(slow_case); | |
| 2453 | |
| 2454 fpop(); // pop incorrect result or int(Y) | |
| 2455 | |
| 2456 fp_runtime_fallback(is_exp ? CAST_FROM_FN_PTR(address, SharedRuntime::dexp) : CAST_FROM_FN_PTR(address, SharedRuntime::dpow), | |
| 2457 is_exp ? 1 : 2, num_fpu_regs_in_use); | |
| 2458 | |
| 2459 // Come here with result in F-TOS | |
| 2460 bind(done); | |
| 2461 } | |
| 2462 | |
| 2463 void MacroAssembler::fpop() { | |
| 2464 ffree(); | |
| 2465 fincstp(); | |
| 2466 } | |
| 2467 | |
| 2468 void MacroAssembler::fremr(Register tmp) { | |
| 2469 save_rax(tmp); | |
| 2470 { Label L; | |
| 2471 bind(L); | |
| 2472 fprem(); | |
| 2473 fwait(); fnstsw_ax(); | |
| 2474 #ifdef _LP64 | |
| 2475 testl(rax, 0x400); | |
| 2476 jcc(Assembler::notEqual, L); | |
| 2477 #else | |
| 2478 sahf(); | |
| 2479 jcc(Assembler::parity, L); | |
| 2480 #endif // _LP64 | |
| 2481 } | |
| 2482 restore_rax(tmp); | |
| 2483 // Result is in ST0. | |
| 2484 // Note: fxch & fpop to get rid of ST1 | |
| 2485 // (otherwise FPU stack could overflow eventually) | |
| 2486 fxch(1); | |
| 2487 fpop(); | |
| 2488 } | |
| 2489 | |
| 2490 | |
| 2491 void MacroAssembler::incrementl(AddressLiteral dst) { | |
| 2492 if (reachable(dst)) { | |
| 2493 incrementl(as_Address(dst)); | |
| 2494 } else { | |
| 2495 lea(rscratch1, dst); | |
| 2496 incrementl(Address(rscratch1, 0)); | |
| 2497 } | |
| 2498 } | |
| 2499 | |
| 2500 void MacroAssembler::incrementl(ArrayAddress dst) { | |
| 2501 incrementl(as_Address(dst)); | |
| 2502 } | |
| 2503 | |
| 2504 void MacroAssembler::incrementl(Register reg, int value) { | |
| 2505 if (value == min_jint) {addl(reg, value) ; return; } | |
| 2506 if (value < 0) { decrementl(reg, -value); return; } | |
| 2507 if (value == 0) { ; return; } | |
| 2508 if (value == 1 && UseIncDec) { incl(reg) ; return; } | |
| 2509 /* else */ { addl(reg, value) ; return; } | |
| 2510 } | |
| 2511 | |
| 2512 void MacroAssembler::incrementl(Address dst, int value) { | |
| 2513 if (value == min_jint) {addl(dst, value) ; return; } | |
| 2514 if (value < 0) { decrementl(dst, -value); return; } | |
| 2515 if (value == 0) { ; return; } | |
| 2516 if (value == 1 && UseIncDec) { incl(dst) ; return; } | |
| 2517 /* else */ { addl(dst, value) ; return; } | |
| 2518 } | |
| 2519 | |
| 2520 void MacroAssembler::jump(AddressLiteral dst) { | |
| 2521 if (reachable(dst)) { | |
| 2522 jmp_literal(dst.target(), dst.rspec()); | |
| 2523 } else { | |
| 2524 lea(rscratch1, dst); | |
| 2525 jmp(rscratch1); | |
| 2526 } | |
| 2527 } | |
| 2528 | |
| 2529 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) { | |
| 2530 if (reachable(dst)) { | |
| 2531 InstructionMark im(this); | |
| 2532 relocate(dst.reloc()); | |
| 2533 const int short_size = 2; | |
| 2534 const int long_size = 6; | |
| 2535 int offs = (intptr_t)dst.target() - ((intptr_t)pc()); | |
| 2536 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) { | |
| 2537 // 0111 tttn #8-bit disp | |
|
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|
2538 emit_int8(0x70 | cc); |
|
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|
2539 emit_int8((offs - short_size) & 0xFF); |
| 7199 | 2540 } else { |
| 2541 // 0000 1111 1000 tttn #32-bit disp | |
|
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|
2542 emit_int8(0x0F); |
|
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|
2543 emit_int8((unsigned char)(0x80 | cc)); |
|
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|
2544 emit_int32(offs - long_size); |
| 7199 | 2545 } |
| 2546 } else { | |
| 2547 #ifdef ASSERT | |
| 2548 warning("reversing conditional branch"); | |
| 2549 #endif /* ASSERT */ | |
| 2550 Label skip; | |
| 2551 jccb(reverse[cc], skip); | |
| 2552 lea(rscratch1, dst); | |
| 2553 Assembler::jmp(rscratch1); | |
| 2554 bind(skip); | |
| 2555 } | |
| 2556 } | |
| 2557 | |
| 2558 void MacroAssembler::ldmxcsr(AddressLiteral src) { | |
| 2559 if (reachable(src)) { | |
| 2560 Assembler::ldmxcsr(as_Address(src)); | |
| 2561 } else { | |
| 2562 lea(rscratch1, src); | |
| 2563 Assembler::ldmxcsr(Address(rscratch1, 0)); | |
| 2564 } | |
| 2565 } | |
| 2566 | |
| 2567 int MacroAssembler::load_signed_byte(Register dst, Address src) { | |
| 2568 int off; | |
| 2569 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
| 2570 off = offset(); | |
| 2571 movsbl(dst, src); // movsxb | |
| 2572 } else { | |
| 2573 off = load_unsigned_byte(dst, src); | |
| 2574 shll(dst, 24); | |
| 2575 sarl(dst, 24); | |
| 2576 } | |
| 2577 return off; | |
| 2578 } | |
| 2579 | |
| 2580 // Note: load_signed_short used to be called load_signed_word. | |
| 2581 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler | |
| 2582 // manual, which means 16 bits, that usage is found nowhere in HotSpot code. | |
| 2583 // The term "word" in HotSpot means a 32- or 64-bit machine word. | |
| 2584 int MacroAssembler::load_signed_short(Register dst, Address src) { | |
| 2585 int off; | |
| 2586 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
| 2587 // This is dubious to me since it seems safe to do a signed 16 => 64 bit | |
| 2588 // version but this is what 64bit has always done. This seems to imply | |
| 2589 // that users are only using 32bits worth. | |
| 2590 off = offset(); | |
| 2591 movswl(dst, src); // movsxw | |
| 2592 } else { | |
| 2593 off = load_unsigned_short(dst, src); | |
| 2594 shll(dst, 16); | |
| 2595 sarl(dst, 16); | |
| 2596 } | |
| 2597 return off; | |
| 2598 } | |
| 2599 | |
| 2600 int MacroAssembler::load_unsigned_byte(Register dst, Address src) { | |
| 2601 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, | |
| 2602 // and "3.9 Partial Register Penalties", p. 22). | |
| 2603 int off; | |
| 2604 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) { | |
| 2605 off = offset(); | |
| 2606 movzbl(dst, src); // movzxb | |
| 2607 } else { | |
| 2608 xorl(dst, dst); | |
| 2609 off = offset(); | |
| 2610 movb(dst, src); | |
| 2611 } | |
| 2612 return off; | |
| 2613 } | |
| 2614 | |
| 2615 // Note: load_unsigned_short used to be called load_unsigned_word. | |
| 2616 int MacroAssembler::load_unsigned_short(Register dst, Address src) { | |
| 2617 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, | |
| 2618 // and "3.9 Partial Register Penalties", p. 22). | |
| 2619 int off; | |
| 2620 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) { | |
| 2621 off = offset(); | |
| 2622 movzwl(dst, src); // movzxw | |
| 2623 } else { | |
| 2624 xorl(dst, dst); | |
| 2625 off = offset(); | |
| 2626 movw(dst, src); | |
| 2627 } | |
| 2628 return off; | |
| 2629 } | |
| 2630 | |
| 2631 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) { | |
| 2632 switch (size_in_bytes) { | |
| 2633 #ifndef _LP64 | |
| 2634 case 8: | |
| 2635 assert(dst2 != noreg, "second dest register required"); | |
| 2636 movl(dst, src); | |
| 2637 movl(dst2, src.plus_disp(BytesPerInt)); | |
| 2638 break; | |
| 2639 #else | |
| 2640 case 8: movq(dst, src); break; | |
| 2641 #endif | |
| 2642 case 4: movl(dst, src); break; | |
| 2643 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break; | |
| 2644 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break; | |
| 2645 default: ShouldNotReachHere(); | |
| 2646 } | |
| 2647 } | |
| 2648 | |
| 2649 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) { | |
| 2650 switch (size_in_bytes) { | |
| 2651 #ifndef _LP64 | |
| 2652 case 8: | |
| 2653 assert(src2 != noreg, "second source register required"); | |
| 2654 movl(dst, src); | |
| 2655 movl(dst.plus_disp(BytesPerInt), src2); | |
| 2656 break; | |
| 2657 #else | |
| 2658 case 8: movq(dst, src); break; | |
| 2659 #endif | |
| 2660 case 4: movl(dst, src); break; | |
| 2661 case 2: movw(dst, src); break; | |
| 2662 case 1: movb(dst, src); break; | |
| 2663 default: ShouldNotReachHere(); | |
| 2664 } | |
| 2665 } | |
| 2666 | |
| 2667 void MacroAssembler::mov32(AddressLiteral dst, Register src) { | |
| 2668 if (reachable(dst)) { | |
| 2669 movl(as_Address(dst), src); | |
| 2670 } else { | |
| 2671 lea(rscratch1, dst); | |
| 2672 movl(Address(rscratch1, 0), src); | |
| 2673 } | |
| 2674 } | |
| 2675 | |
| 2676 void MacroAssembler::mov32(Register dst, AddressLiteral src) { | |
| 2677 if (reachable(src)) { | |
| 2678 movl(dst, as_Address(src)); | |
| 2679 } else { | |
| 2680 lea(rscratch1, src); | |
| 2681 movl(dst, Address(rscratch1, 0)); | |
| 2682 } | |
| 2683 } | |
| 2684 | |
| 2685 // C++ bool manipulation | |
| 2686 | |
| 2687 void MacroAssembler::movbool(Register dst, Address src) { | |
| 2688 if(sizeof(bool) == 1) | |
| 2689 movb(dst, src); | |
| 2690 else if(sizeof(bool) == 2) | |
| 2691 movw(dst, src); | |
| 2692 else if(sizeof(bool) == 4) | |
| 2693 movl(dst, src); | |
| 2694 else | |
| 2695 // unsupported | |
| 2696 ShouldNotReachHere(); | |
| 2697 } | |
| 2698 | |
| 2699 void MacroAssembler::movbool(Address dst, bool boolconst) { | |
| 2700 if(sizeof(bool) == 1) | |
| 2701 movb(dst, (int) boolconst); | |
| 2702 else if(sizeof(bool) == 2) | |
| 2703 movw(dst, (int) boolconst); | |
| 2704 else if(sizeof(bool) == 4) | |
| 2705 movl(dst, (int) boolconst); | |
| 2706 else | |
| 2707 // unsupported | |
| 2708 ShouldNotReachHere(); | |
| 2709 } | |
| 2710 | |
| 2711 void MacroAssembler::movbool(Address dst, Register src) { | |
| 2712 if(sizeof(bool) == 1) | |
| 2713 movb(dst, src); | |
| 2714 else if(sizeof(bool) == 2) | |
| 2715 movw(dst, src); | |
| 2716 else if(sizeof(bool) == 4) | |
| 2717 movl(dst, src); | |
| 2718 else | |
| 2719 // unsupported | |
| 2720 ShouldNotReachHere(); | |
| 2721 } | |
| 2722 | |
| 2723 void MacroAssembler::movbyte(ArrayAddress dst, int src) { | |
| 2724 movb(as_Address(dst), src); | |
| 2725 } | |
| 2726 | |
| 2727 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) { | |
| 2728 if (reachable(src)) { | |
| 2729 movdl(dst, as_Address(src)); | |
| 2730 } else { | |
| 2731 lea(rscratch1, src); | |
| 2732 movdl(dst, Address(rscratch1, 0)); | |
| 2733 } | |
| 2734 } | |
| 2735 | |
| 2736 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) { | |
| 2737 if (reachable(src)) { | |
| 2738 movq(dst, as_Address(src)); | |
| 2739 } else { | |
| 2740 lea(rscratch1, src); | |
| 2741 movq(dst, Address(rscratch1, 0)); | |
| 2742 } | |
| 2743 } | |
| 2744 | |
| 2745 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) { | |
| 2746 if (reachable(src)) { | |
| 2747 if (UseXmmLoadAndClearUpper) { | |
| 2748 movsd (dst, as_Address(src)); | |
| 2749 } else { | |
| 2750 movlpd(dst, as_Address(src)); | |
| 2751 } | |
| 2752 } else { | |
| 2753 lea(rscratch1, src); | |
| 2754 if (UseXmmLoadAndClearUpper) { | |
| 2755 movsd (dst, Address(rscratch1, 0)); | |
| 2756 } else { | |
| 2757 movlpd(dst, Address(rscratch1, 0)); | |
| 2758 } | |
| 2759 } | |
| 2760 } | |
| 2761 | |
| 2762 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) { | |
| 2763 if (reachable(src)) { | |
| 2764 movss(dst, as_Address(src)); | |
| 2765 } else { | |
| 2766 lea(rscratch1, src); | |
| 2767 movss(dst, Address(rscratch1, 0)); | |
| 2768 } | |
| 2769 } | |
| 2770 | |
| 2771 void MacroAssembler::movptr(Register dst, Register src) { | |
| 2772 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
| 2773 } | |
| 2774 | |
| 2775 void MacroAssembler::movptr(Register dst, Address src) { | |
| 2776 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
| 2777 } | |
| 2778 | |
| 2779 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
| 2780 void MacroAssembler::movptr(Register dst, intptr_t src) { | |
| 2781 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src)); | |
| 2782 } | |
| 2783 | |
| 2784 void MacroAssembler::movptr(Address dst, Register src) { | |
| 2785 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
| 2786 } | |
| 2787 | |
| 2788 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src) { | |
| 2789 if (reachable(src)) { | |
| 2790 Assembler::movdqu(dst, as_Address(src)); | |
| 2791 } else { | |
| 2792 lea(rscratch1, src); | |
| 2793 Assembler::movdqu(dst, Address(rscratch1, 0)); | |
| 2794 } | |
| 2795 } | |
| 2796 | |
|
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2797 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) { |
|
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2798 if (reachable(src)) { |
|
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|
2799 Assembler::movdqa(dst, as_Address(src)); |
|
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|
2800 } else { |
|
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|
2801 lea(rscratch1, src); |
|
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|
2802 Assembler::movdqa(dst, Address(rscratch1, 0)); |
|
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2803 } |
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2804 } |
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2805 |
| 7199 | 2806 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) { |
| 2807 if (reachable(src)) { | |
| 2808 Assembler::movsd(dst, as_Address(src)); | |
| 2809 } else { | |
| 2810 lea(rscratch1, src); | |
| 2811 Assembler::movsd(dst, Address(rscratch1, 0)); | |
| 2812 } | |
| 2813 } | |
| 2814 | |
| 2815 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) { | |
| 2816 if (reachable(src)) { | |
| 2817 Assembler::movss(dst, as_Address(src)); | |
| 2818 } else { | |
| 2819 lea(rscratch1, src); | |
| 2820 Assembler::movss(dst, Address(rscratch1, 0)); | |
| 2821 } | |
| 2822 } | |
| 2823 | |
| 2824 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) { | |
| 2825 if (reachable(src)) { | |
| 2826 Assembler::mulsd(dst, as_Address(src)); | |
| 2827 } else { | |
| 2828 lea(rscratch1, src); | |
| 2829 Assembler::mulsd(dst, Address(rscratch1, 0)); | |
| 2830 } | |
| 2831 } | |
| 2832 | |
| 2833 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) { | |
| 2834 if (reachable(src)) { | |
| 2835 Assembler::mulss(dst, as_Address(src)); | |
| 2836 } else { | |
| 2837 lea(rscratch1, src); | |
| 2838 Assembler::mulss(dst, Address(rscratch1, 0)); | |
| 2839 } | |
| 2840 } | |
| 2841 | |
| 2842 void MacroAssembler::null_check(Register reg, int offset) { | |
| 2843 if (needs_explicit_null_check(offset)) { | |
| 2844 // provoke OS NULL exception if reg = NULL by | |
| 2845 // accessing M[reg] w/o changing any (non-CC) registers | |
| 2846 // NOTE: cmpl is plenty here to provoke a segv | |
| 2847 cmpptr(rax, Address(reg, 0)); | |
| 2848 // Note: should probably use testl(rax, Address(reg, 0)); | |
| 2849 // may be shorter code (however, this version of | |
| 2850 // testl needs to be implemented first) | |
| 2851 } else { | |
| 2852 // nothing to do, (later) access of M[reg + offset] | |
| 2853 // will provoke OS NULL exception if reg = NULL | |
| 2854 } | |
| 2855 } | |
| 2856 | |
| 2857 void MacroAssembler::os_breakpoint() { | |
| 2858 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability | |
| 2859 // (e.g., MSVC can't call ps() otherwise) | |
| 2860 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); | |
| 2861 } | |
| 2862 | |
| 2863 void MacroAssembler::pop_CPU_state() { | |
| 2864 pop_FPU_state(); | |
| 2865 pop_IU_state(); | |
| 2866 } | |
| 2867 | |
| 2868 void MacroAssembler::pop_FPU_state() { | |
| 2869 NOT_LP64(frstor(Address(rsp, 0));) | |
| 2870 LP64_ONLY(fxrstor(Address(rsp, 0));) | |
| 2871 addptr(rsp, FPUStateSizeInWords * wordSize); | |
| 2872 } | |
| 2873 | |
| 2874 void MacroAssembler::pop_IU_state() { | |
| 2875 popa(); | |
| 2876 LP64_ONLY(addq(rsp, 8)); | |
| 2877 popf(); | |
| 2878 } | |
| 2879 | |
| 2880 // Save Integer and Float state | |
| 2881 // Warning: Stack must be 16 byte aligned (64bit) | |
| 2882 void MacroAssembler::push_CPU_state() { | |
| 2883 push_IU_state(); | |
| 2884 push_FPU_state(); | |
| 2885 } | |
| 2886 | |
| 2887 void MacroAssembler::push_FPU_state() { | |
| 2888 subptr(rsp, FPUStateSizeInWords * wordSize); | |
| 2889 #ifndef _LP64 | |
| 2890 fnsave(Address(rsp, 0)); | |
| 2891 fwait(); | |
| 2892 #else | |
| 2893 fxsave(Address(rsp, 0)); | |
| 2894 #endif // LP64 | |
| 2895 } | |
| 2896 | |
| 2897 void MacroAssembler::push_IU_state() { | |
| 2898 // Push flags first because pusha kills them | |
| 2899 pushf(); | |
| 2900 // Make sure rsp stays 16-byte aligned | |
| 2901 LP64_ONLY(subq(rsp, 8)); | |
| 2902 pusha(); | |
| 2903 } | |
| 2904 | |
| 2905 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) { | |
| 2906 // determine java_thread register | |
| 2907 if (!java_thread->is_valid()) { | |
| 2908 java_thread = rdi; | |
| 2909 get_thread(java_thread); | |
| 2910 } | |
| 2911 // we must set sp to zero to clear frame | |
| 2912 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); | |
| 2913 if (clear_fp) { | |
| 2914 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); | |
| 2915 } | |
| 2916 | |
| 2917 if (clear_pc) | |
| 2918 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); | |
| 2919 | |
| 2920 } | |
| 2921 | |
| 2922 void MacroAssembler::restore_rax(Register tmp) { | |
| 2923 if (tmp == noreg) pop(rax); | |
| 2924 else if (tmp != rax) mov(rax, tmp); | |
| 2925 } | |
| 2926 | |
| 2927 void MacroAssembler::round_to(Register reg, int modulus) { | |
| 2928 addptr(reg, modulus - 1); | |
| 2929 andptr(reg, -modulus); | |
| 2930 } | |
| 2931 | |
| 2932 void MacroAssembler::save_rax(Register tmp) { | |
| 2933 if (tmp == noreg) push(rax); | |
| 2934 else if (tmp != rax) mov(tmp, rax); | |
| 2935 } | |
| 2936 | |
| 2937 // Write serialization page so VM thread can do a pseudo remote membar. | |
| 2938 // We use the current thread pointer to calculate a thread specific | |
| 2939 // offset to write to within the page. This minimizes bus traffic | |
| 2940 // due to cache line collision. | |
| 2941 void MacroAssembler::serialize_memory(Register thread, Register tmp) { | |
| 2942 movl(tmp, thread); | |
| 2943 shrl(tmp, os::get_serialize_page_shift_count()); | |
| 2944 andl(tmp, (os::vm_page_size() - sizeof(int))); | |
| 2945 | |
| 2946 Address index(noreg, tmp, Address::times_1); | |
| 2947 ExternalAddress page(os::get_memory_serialize_page()); | |
| 2948 | |
| 2949 // Size of store must match masking code above | |
| 2950 movl(as_Address(ArrayAddress(page, index)), tmp); | |
| 2951 } | |
| 2952 | |
| 2953 // Calls to C land | |
| 2954 // | |
| 2955 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded | |
| 2956 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp | |
| 2957 // has to be reset to 0. This is required to allow proper stack traversal. | |
| 2958 void MacroAssembler::set_last_Java_frame(Register java_thread, | |
| 2959 Register last_java_sp, | |
| 2960 Register last_java_fp, | |
| 2961 address last_java_pc) { | |
| 2962 // determine java_thread register | |
| 2963 if (!java_thread->is_valid()) { | |
| 2964 java_thread = rdi; | |
| 2965 get_thread(java_thread); | |
| 2966 } | |
| 2967 // determine last_java_sp register | |
| 2968 if (!last_java_sp->is_valid()) { | |
| 2969 last_java_sp = rsp; | |
| 2970 } | |
| 2971 | |
| 2972 // last_java_fp is optional | |
| 2973 | |
| 2974 if (last_java_fp->is_valid()) { | |
| 2975 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp); | |
| 2976 } | |
| 2977 | |
| 2978 // last_java_pc is optional | |
| 2979 | |
| 2980 if (last_java_pc != NULL) { | |
| 2981 lea(Address(java_thread, | |
| 2982 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()), | |
| 2983 InternalAddress(last_java_pc)); | |
| 2984 | |
| 2985 } | |
| 2986 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp); | |
| 2987 } | |
| 2988 | |
| 2989 void MacroAssembler::shlptr(Register dst, int imm8) { | |
| 2990 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8)); | |
| 2991 } | |
| 2992 | |
| 2993 void MacroAssembler::shrptr(Register dst, int imm8) { | |
| 2994 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8)); | |
| 2995 } | |
| 2996 | |
| 2997 void MacroAssembler::sign_extend_byte(Register reg) { | |
| 2998 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) { | |
| 2999 movsbl(reg, reg); // movsxb | |
| 3000 } else { | |
| 3001 shll(reg, 24); | |
| 3002 sarl(reg, 24); | |
| 3003 } | |
| 3004 } | |
| 3005 | |
| 3006 void MacroAssembler::sign_extend_short(Register reg) { | |
| 3007 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
| 3008 movswl(reg, reg); // movsxw | |
| 3009 } else { | |
| 3010 shll(reg, 16); | |
| 3011 sarl(reg, 16); | |
| 3012 } | |
| 3013 } | |
| 3014 | |
| 3015 void MacroAssembler::testl(Register dst, AddressLiteral src) { | |
| 3016 assert(reachable(src), "Address should be reachable"); | |
| 3017 testl(dst, as_Address(src)); | |
| 3018 } | |
| 3019 | |
| 3020 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) { | |
| 3021 if (reachable(src)) { | |
| 3022 Assembler::sqrtsd(dst, as_Address(src)); | |
| 3023 } else { | |
| 3024 lea(rscratch1, src); | |
| 3025 Assembler::sqrtsd(dst, Address(rscratch1, 0)); | |
| 3026 } | |
| 3027 } | |
| 3028 | |
| 3029 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) { | |
| 3030 if (reachable(src)) { | |
| 3031 Assembler::sqrtss(dst, as_Address(src)); | |
| 3032 } else { | |
| 3033 lea(rscratch1, src); | |
| 3034 Assembler::sqrtss(dst, Address(rscratch1, 0)); | |
| 3035 } | |
| 3036 } | |
| 3037 | |
| 3038 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) { | |
| 3039 if (reachable(src)) { | |
| 3040 Assembler::subsd(dst, as_Address(src)); | |
| 3041 } else { | |
| 3042 lea(rscratch1, src); | |
| 3043 Assembler::subsd(dst, Address(rscratch1, 0)); | |
| 3044 } | |
| 3045 } | |
| 3046 | |
| 3047 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) { | |
| 3048 if (reachable(src)) { | |
| 3049 Assembler::subss(dst, as_Address(src)); | |
| 3050 } else { | |
| 3051 lea(rscratch1, src); | |
| 3052 Assembler::subss(dst, Address(rscratch1, 0)); | |
| 3053 } | |
| 3054 } | |
| 3055 | |
| 3056 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) { | |
| 3057 if (reachable(src)) { | |
| 3058 Assembler::ucomisd(dst, as_Address(src)); | |
| 3059 } else { | |
| 3060 lea(rscratch1, src); | |
| 3061 Assembler::ucomisd(dst, Address(rscratch1, 0)); | |
| 3062 } | |
| 3063 } | |
| 3064 | |
| 3065 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) { | |
| 3066 if (reachable(src)) { | |
| 3067 Assembler::ucomiss(dst, as_Address(src)); | |
| 3068 } else { | |
| 3069 lea(rscratch1, src); | |
| 3070 Assembler::ucomiss(dst, Address(rscratch1, 0)); | |
| 3071 } | |
| 3072 } | |
| 3073 | |
| 3074 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) { | |
| 3075 // Used in sign-bit flipping with aligned address. | |
| 3076 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 3077 if (reachable(src)) { | |
| 3078 Assembler::xorpd(dst, as_Address(src)); | |
| 3079 } else { | |
| 3080 lea(rscratch1, src); | |
| 3081 Assembler::xorpd(dst, Address(rscratch1, 0)); | |
| 3082 } | |
| 3083 } | |
| 3084 | |
| 3085 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) { | |
| 3086 // Used in sign-bit flipping with aligned address. | |
| 3087 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
| 3088 if (reachable(src)) { | |
| 3089 Assembler::xorps(dst, as_Address(src)); | |
| 3090 } else { | |
| 3091 lea(rscratch1, src); | |
| 3092 Assembler::xorps(dst, Address(rscratch1, 0)); | |
| 3093 } | |
| 3094 } | |
| 3095 | |
| 3096 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) { | |
| 3097 // Used in sign-bit flipping with aligned address. | |
| 7427 | 3098 bool aligned_adr = (((intptr_t)src.target() & 15) == 0); |
| 3099 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes"); | |
| 7199 | 3100 if (reachable(src)) { |
| 3101 Assembler::pshufb(dst, as_Address(src)); | |
| 3102 } else { | |
| 3103 lea(rscratch1, src); | |
| 3104 Assembler::pshufb(dst, Address(rscratch1, 0)); | |
| 3105 } | |
| 3106 } | |
| 3107 | |
| 3108 // AVX 3-operands instructions | |
| 3109 | |
| 3110 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3111 if (reachable(src)) { | |
| 3112 vaddsd(dst, nds, as_Address(src)); | |
| 3113 } else { | |
| 3114 lea(rscratch1, src); | |
| 3115 vaddsd(dst, nds, Address(rscratch1, 0)); | |
| 3116 } | |
| 3117 } | |
| 3118 | |
| 3119 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3120 if (reachable(src)) { | |
| 3121 vaddss(dst, nds, as_Address(src)); | |
| 3122 } else { | |
| 3123 lea(rscratch1, src); | |
| 3124 vaddss(dst, nds, Address(rscratch1, 0)); | |
| 3125 } | |
| 3126 } | |
| 3127 | |
| 3128 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 3129 if (reachable(src)) { | |
| 3130 vandpd(dst, nds, as_Address(src), vector256); | |
| 3131 } else { | |
| 3132 lea(rscratch1, src); | |
| 3133 vandpd(dst, nds, Address(rscratch1, 0), vector256); | |
| 3134 } | |
| 3135 } | |
| 3136 | |
| 3137 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 3138 if (reachable(src)) { | |
| 3139 vandps(dst, nds, as_Address(src), vector256); | |
| 3140 } else { | |
| 3141 lea(rscratch1, src); | |
| 3142 vandps(dst, nds, Address(rscratch1, 0), vector256); | |
| 3143 } | |
| 3144 } | |
| 3145 | |
| 3146 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3147 if (reachable(src)) { | |
| 3148 vdivsd(dst, nds, as_Address(src)); | |
| 3149 } else { | |
| 3150 lea(rscratch1, src); | |
| 3151 vdivsd(dst, nds, Address(rscratch1, 0)); | |
| 3152 } | |
| 3153 } | |
| 3154 | |
| 3155 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3156 if (reachable(src)) { | |
| 3157 vdivss(dst, nds, as_Address(src)); | |
| 3158 } else { | |
| 3159 lea(rscratch1, src); | |
| 3160 vdivss(dst, nds, Address(rscratch1, 0)); | |
| 3161 } | |
| 3162 } | |
| 3163 | |
| 3164 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3165 if (reachable(src)) { | |
| 3166 vmulsd(dst, nds, as_Address(src)); | |
| 3167 } else { | |
| 3168 lea(rscratch1, src); | |
| 3169 vmulsd(dst, nds, Address(rscratch1, 0)); | |
| 3170 } | |
| 3171 } | |
| 3172 | |
| 3173 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3174 if (reachable(src)) { | |
| 3175 vmulss(dst, nds, as_Address(src)); | |
| 3176 } else { | |
| 3177 lea(rscratch1, src); | |
| 3178 vmulss(dst, nds, Address(rscratch1, 0)); | |
| 3179 } | |
| 3180 } | |
| 3181 | |
| 3182 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3183 if (reachable(src)) { | |
| 3184 vsubsd(dst, nds, as_Address(src)); | |
| 3185 } else { | |
| 3186 lea(rscratch1, src); | |
| 3187 vsubsd(dst, nds, Address(rscratch1, 0)); | |
| 3188 } | |
| 3189 } | |
| 3190 | |
| 3191 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
| 3192 if (reachable(src)) { | |
| 3193 vsubss(dst, nds, as_Address(src)); | |
| 3194 } else { | |
| 3195 lea(rscratch1, src); | |
| 3196 vsubss(dst, nds, Address(rscratch1, 0)); | |
| 3197 } | |
| 3198 } | |
| 3199 | |
| 3200 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 3201 if (reachable(src)) { | |
| 3202 vxorpd(dst, nds, as_Address(src), vector256); | |
| 3203 } else { | |
| 3204 lea(rscratch1, src); | |
| 3205 vxorpd(dst, nds, Address(rscratch1, 0), vector256); | |
| 3206 } | |
| 3207 } | |
| 3208 | |
| 3209 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
| 3210 if (reachable(src)) { | |
| 3211 vxorps(dst, nds, as_Address(src), vector256); | |
| 3212 } else { | |
| 3213 lea(rscratch1, src); | |
| 3214 vxorps(dst, nds, Address(rscratch1, 0), vector256); | |
| 3215 } | |
| 3216 } | |
| 3217 | |
| 3218 | |
| 3219 ////////////////////////////////////////////////////////////////////////////////// | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7477
diff
changeset
|
3220 #if INCLUDE_ALL_GCS |
| 7199 | 3221 |
| 3222 void MacroAssembler::g1_write_barrier_pre(Register obj, | |
| 3223 Register pre_val, | |
| 3224 Register thread, | |
| 3225 Register tmp, | |
| 3226 bool tosca_live, | |
| 3227 bool expand_call) { | |
| 3228 | |
| 3229 // If expand_call is true then we expand the call_VM_leaf macro | |
| 3230 // directly to skip generating the check by | |
| 3231 // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp. | |
| 3232 | |
| 3233 #ifdef _LP64 | |
| 3234 assert(thread == r15_thread, "must be"); | |
| 3235 #endif // _LP64 | |
| 3236 | |
| 3237 Label done; | |
| 3238 Label runtime; | |
| 3239 | |
| 3240 assert(pre_val != noreg, "check this code"); | |
| 3241 | |
| 3242 if (obj != noreg) { | |
| 3243 assert_different_registers(obj, pre_val, tmp); | |
| 3244 assert(pre_val != rax, "check this code"); | |
| 3245 } | |
| 3246 | |
| 3247 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
| 3248 PtrQueue::byte_offset_of_active())); | |
| 3249 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
| 3250 PtrQueue::byte_offset_of_index())); | |
| 3251 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
| 3252 PtrQueue::byte_offset_of_buf())); | |
| 3253 | |
| 3254 | |
| 3255 // Is marking active? | |
| 3256 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { | |
| 3257 cmpl(in_progress, 0); | |
| 3258 } else { | |
| 3259 assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption"); | |
| 3260 cmpb(in_progress, 0); | |
| 3261 } | |
| 3262 jcc(Assembler::equal, done); | |
| 3263 | |
| 3264 // Do we need to load the previous value? | |
| 3265 if (obj != noreg) { | |
| 3266 load_heap_oop(pre_val, Address(obj, 0)); | |
| 3267 } | |
| 3268 | |
| 3269 // Is the previous value null? | |
| 3270 cmpptr(pre_val, (int32_t) NULL_WORD); | |
| 3271 jcc(Assembler::equal, done); | |
| 3272 | |
| 3273 // Can we store original value in the thread's buffer? | |
| 3274 // Is index == 0? | |
| 3275 // (The index field is typed as size_t.) | |
| 3276 | |
| 3277 movptr(tmp, index); // tmp := *index_adr | |
| 3278 cmpptr(tmp, 0); // tmp == 0? | |
| 3279 jcc(Assembler::equal, runtime); // If yes, goto runtime | |
| 3280 | |
| 3281 subptr(tmp, wordSize); // tmp := tmp - wordSize | |
| 3282 movptr(index, tmp); // *index_adr := tmp | |
| 3283 addptr(tmp, buffer); // tmp := tmp + *buffer_adr | |
| 3284 | |
| 3285 // Record the previous value | |
| 3286 movptr(Address(tmp, 0), pre_val); | |
| 3287 jmp(done); | |
| 3288 | |
| 3289 bind(runtime); | |
| 3290 // save the live input values | |
| 3291 if(tosca_live) push(rax); | |
| 3292 | |
| 3293 if (obj != noreg && obj != rax) | |
| 3294 push(obj); | |
| 3295 | |
| 3296 if (pre_val != rax) | |
| 3297 push(pre_val); | |
| 3298 | |
| 3299 // Calling the runtime using the regular call_VM_leaf mechanism generates | |
| 3300 // code (generated by InterpreterMacroAssember::call_VM_leaf_base) | |
| 3301 // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL. | |
| 3302 // | |
| 3303 // If we care generating the pre-barrier without a frame (e.g. in the | |
| 3304 // intrinsified Reference.get() routine) then ebp might be pointing to | |
| 3305 // the caller frame and so this check will most likely fail at runtime. | |
| 3306 // | |
| 3307 // Expanding the call directly bypasses the generation of the check. | |
| 3308 // So when we do not have have a full interpreter frame on the stack | |
| 3309 // expand_call should be passed true. | |
| 3310 | |
| 3311 NOT_LP64( push(thread); ) | |
| 3312 | |
| 3313 if (expand_call) { | |
| 3314 LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); ) | |
| 3315 pass_arg1(this, thread); | |
| 3316 pass_arg0(this, pre_val); | |
| 3317 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), 2); | |
| 3318 } else { | |
| 3319 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread); | |
| 3320 } | |
| 3321 | |
| 3322 NOT_LP64( pop(thread); ) | |
| 3323 | |
| 3324 // save the live input values | |
| 3325 if (pre_val != rax) | |
| 3326 pop(pre_val); | |
| 3327 | |
| 3328 if (obj != noreg && obj != rax) | |
| 3329 pop(obj); | |
| 3330 | |
| 3331 if(tosca_live) pop(rax); | |
| 3332 | |
| 3333 bind(done); | |
| 3334 } | |
| 3335 | |
| 3336 void MacroAssembler::g1_write_barrier_post(Register store_addr, | |
| 3337 Register new_val, | |
| 3338 Register thread, | |
| 3339 Register tmp, | |
| 3340 Register tmp2) { | |
| 3341 #ifdef _LP64 | |
| 3342 assert(thread == r15_thread, "must be"); | |
| 3343 #endif // _LP64 | |
| 3344 | |
| 3345 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() + | |
| 3346 PtrQueue::byte_offset_of_index())); | |
| 3347 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() + | |
| 3348 PtrQueue::byte_offset_of_buf())); | |
| 3349 | |
| 3350 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 3351 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
| 3352 Label done; | |
| 3353 Label runtime; | |
| 3354 | |
| 3355 // Does store cross heap regions? | |
| 3356 | |
| 3357 movptr(tmp, store_addr); | |
| 3358 xorptr(tmp, new_val); | |
| 3359 shrptr(tmp, HeapRegion::LogOfHRGrainBytes); | |
| 3360 jcc(Assembler::equal, done); | |
| 3361 | |
| 3362 // crosses regions, storing NULL? | |
| 3363 | |
| 3364 cmpptr(new_val, (int32_t) NULL_WORD); | |
| 3365 jcc(Assembler::equal, done); | |
| 3366 | |
| 3367 // storing region crossing non-NULL, is card already dirty? | |
| 3368 | |
| 3369 ExternalAddress cardtable((address) ct->byte_map_base); | |
| 3370 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
| 3371 #ifdef _LP64 | |
| 3372 const Register card_addr = tmp; | |
| 3373 | |
| 3374 movq(card_addr, store_addr); | |
| 3375 shrq(card_addr, CardTableModRefBS::card_shift); | |
| 3376 | |
| 3377 lea(tmp2, cardtable); | |
| 3378 | |
| 3379 // get the address of the card | |
| 3380 addq(card_addr, tmp2); | |
| 3381 #else | |
| 3382 const Register card_index = tmp; | |
| 3383 | |
| 3384 movl(card_index, store_addr); | |
| 3385 shrl(card_index, CardTableModRefBS::card_shift); | |
| 3386 | |
| 3387 Address index(noreg, card_index, Address::times_1); | |
| 3388 const Register card_addr = tmp; | |
| 3389 lea(card_addr, as_Address(ArrayAddress(cardtable, index))); | |
| 3390 #endif | |
| 3391 cmpb(Address(card_addr, 0), 0); | |
| 3392 jcc(Assembler::equal, done); | |
| 3393 | |
| 3394 // storing a region crossing, non-NULL oop, card is clean. | |
| 3395 // dirty card and log. | |
| 3396 | |
| 3397 movb(Address(card_addr, 0), 0); | |
| 3398 | |
| 3399 cmpl(queue_index, 0); | |
| 3400 jcc(Assembler::equal, runtime); | |
| 3401 subl(queue_index, wordSize); | |
| 3402 movptr(tmp2, buffer); | |
| 3403 #ifdef _LP64 | |
| 3404 movslq(rscratch1, queue_index); | |
| 3405 addq(tmp2, rscratch1); | |
| 3406 movq(Address(tmp2, 0), card_addr); | |
| 3407 #else | |
| 3408 addl(tmp2, queue_index); | |
| 3409 movl(Address(tmp2, 0), card_index); | |
| 3410 #endif | |
| 3411 jmp(done); | |
| 3412 | |
| 3413 bind(runtime); | |
| 3414 // save the live input values | |
| 3415 push(store_addr); | |
| 3416 push(new_val); | |
| 3417 #ifdef _LP64 | |
| 3418 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread); | |
| 3419 #else | |
| 3420 push(thread); | |
| 3421 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread); | |
| 3422 pop(thread); | |
| 3423 #endif | |
| 3424 pop(new_val); | |
| 3425 pop(store_addr); | |
| 3426 | |
| 3427 bind(done); | |
| 3428 } | |
| 3429 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7477
diff
changeset
|
3430 #endif // INCLUDE_ALL_GCS |
| 7199 | 3431 ////////////////////////////////////////////////////////////////////////////////// |
| 3432 | |
| 3433 | |
| 3434 void MacroAssembler::store_check(Register obj) { | |
| 3435 // Does a store check for the oop in register obj. The content of | |
| 3436 // register obj is destroyed afterwards. | |
| 3437 store_check_part_1(obj); | |
| 3438 store_check_part_2(obj); | |
| 3439 } | |
| 3440 | |
| 3441 void MacroAssembler::store_check(Register obj, Address dst) { | |
| 3442 store_check(obj); | |
| 3443 } | |
| 3444 | |
| 3445 | |
| 3446 // split the store check operation so that other instructions can be scheduled inbetween | |
| 3447 void MacroAssembler::store_check_part_1(Register obj) { | |
| 3448 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 3449 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | |
| 3450 shrptr(obj, CardTableModRefBS::card_shift); | |
| 3451 } | |
| 3452 | |
| 3453 void MacroAssembler::store_check_part_2(Register obj) { | |
| 3454 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 3455 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | |
| 3456 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
| 3457 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
| 3458 | |
| 3459 // The calculation for byte_map_base is as follows: | |
| 3460 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift); | |
| 3461 // So this essentially converts an address to a displacement and | |
| 3462 // it will never need to be relocated. On 64bit however the value may be too | |
| 3463 // large for a 32bit displacement | |
| 3464 | |
| 3465 intptr_t disp = (intptr_t) ct->byte_map_base; | |
| 3466 if (is_simm32(disp)) { | |
| 3467 Address cardtable(noreg, obj, Address::times_1, disp); | |
| 3468 movb(cardtable, 0); | |
| 3469 } else { | |
| 3470 // By doing it as an ExternalAddress disp could be converted to a rip-relative | |
| 3471 // displacement and done in a single instruction given favorable mapping and | |
| 3472 // a smarter version of as_Address. Worst case it is two instructions which | |
| 3473 // is no worse off then loading disp into a register and doing as a simple | |
| 3474 // Address() as above. | |
| 3475 // We can't do as ExternalAddress as the only style since if disp == 0 we'll | |
| 3476 // assert since NULL isn't acceptable in a reloci (see 6644928). In any case | |
| 3477 // in some cases we'll get a single instruction version. | |
| 3478 | |
| 3479 ExternalAddress cardtable((address)disp); | |
| 3480 Address index(noreg, obj, Address::times_1); | |
| 3481 movb(as_Address(ArrayAddress(cardtable, index)), 0); | |
| 3482 } | |
| 3483 } | |
| 3484 | |
| 3485 void MacroAssembler::subptr(Register dst, int32_t imm32) { | |
| 3486 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32)); | |
| 3487 } | |
| 3488 | |
| 3489 // Force generation of a 4 byte immediate value even if it fits into 8bit | |
| 3490 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) { | |
| 3491 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32)); | |
| 3492 } | |
| 3493 | |
| 3494 void MacroAssembler::subptr(Register dst, Register src) { | |
| 3495 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); | |
| 3496 } | |
| 3497 | |
| 3498 // C++ bool manipulation | |
| 3499 void MacroAssembler::testbool(Register dst) { | |
| 3500 if(sizeof(bool) == 1) | |
| 3501 testb(dst, 0xff); | |
| 3502 else if(sizeof(bool) == 2) { | |
| 3503 // testw implementation needed for two byte bools | |
| 3504 ShouldNotReachHere(); | |
| 3505 } else if(sizeof(bool) == 4) | |
| 3506 testl(dst, dst); | |
| 3507 else | |
| 3508 // unsupported | |
| 3509 ShouldNotReachHere(); | |
| 3510 } | |
| 3511 | |
| 3512 void MacroAssembler::testptr(Register dst, Register src) { | |
| 3513 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src)); | |
| 3514 } | |
| 3515 | |
| 3516 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes. | |
| 3517 void MacroAssembler::tlab_allocate(Register obj, | |
| 3518 Register var_size_in_bytes, | |
| 3519 int con_size_in_bytes, | |
| 3520 Register t1, | |
| 3521 Register t2, | |
| 3522 Label& slow_case) { | |
| 3523 assert_different_registers(obj, t1, t2); | |
| 3524 assert_different_registers(obj, var_size_in_bytes, t1); | |
| 3525 Register end = t2; | |
| 3526 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread); | |
| 3527 | |
| 3528 verify_tlab(); | |
| 3529 | |
| 3530 NOT_LP64(get_thread(thread)); | |
| 3531 | |
| 3532 movptr(obj, Address(thread, JavaThread::tlab_top_offset())); | |
| 3533 if (var_size_in_bytes == noreg) { | |
| 3534 lea(end, Address(obj, con_size_in_bytes)); | |
| 3535 } else { | |
| 3536 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); | |
| 3537 } | |
| 3538 cmpptr(end, Address(thread, JavaThread::tlab_end_offset())); | |
| 3539 jcc(Assembler::above, slow_case); | |
| 3540 | |
| 3541 // update the tlab top pointer | |
| 3542 movptr(Address(thread, JavaThread::tlab_top_offset()), end); | |
| 3543 | |
| 3544 // recover var_size_in_bytes if necessary | |
| 3545 if (var_size_in_bytes == end) { | |
| 3546 subptr(var_size_in_bytes, obj); | |
| 3547 } | |
| 3548 verify_tlab(); | |
| 3549 } | |
| 3550 | |
| 3551 // Preserves rbx, and rdx. | |
| 3552 Register MacroAssembler::tlab_refill(Label& retry, | |
| 3553 Label& try_eden, | |
| 3554 Label& slow_case) { | |
| 3555 Register top = rax; | |
| 3556 Register t1 = rcx; | |
| 3557 Register t2 = rsi; | |
| 3558 Register thread_reg = NOT_LP64(rdi) LP64_ONLY(r15_thread); | |
| 3559 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx); | |
| 3560 Label do_refill, discard_tlab; | |
| 3561 | |
| 3562 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
| 3563 // No allocation in the shared eden. | |
| 3564 jmp(slow_case); | |
| 3565 } | |
| 3566 | |
| 3567 NOT_LP64(get_thread(thread_reg)); | |
| 3568 | |
| 3569 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
| 3570 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); | |
| 3571 | |
| 3572 // calculate amount of free space | |
| 3573 subptr(t1, top); | |
| 3574 shrptr(t1, LogHeapWordSize); | |
| 3575 | |
| 3576 // Retain tlab and allocate object in shared space if | |
| 3577 // the amount free in the tlab is too large to discard. | |
| 3578 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset()))); | |
| 3579 jcc(Assembler::lessEqual, discard_tlab); | |
| 3580 | |
| 3581 // Retain | |
| 3582 // %%% yuck as movptr... | |
| 3583 movptr(t2, (int32_t) ThreadLocalAllocBuffer::refill_waste_limit_increment()); | |
| 3584 addptr(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2); | |
| 3585 if (TLABStats) { | |
| 3586 // increment number of slow_allocations | |
| 3587 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1); | |
| 3588 } | |
| 3589 jmp(try_eden); | |
| 3590 | |
| 3591 bind(discard_tlab); | |
| 3592 if (TLABStats) { | |
| 3593 // increment number of refills | |
| 3594 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1); | |
| 3595 // accumulate wastage -- t1 is amount free in tlab | |
| 3596 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1); | |
| 3597 } | |
| 3598 | |
| 3599 // if tlab is currently allocated (top or end != null) then | |
| 3600 // fill [top, end + alignment_reserve) with array object | |
| 3601 testptr(top, top); | |
| 3602 jcc(Assembler::zero, do_refill); | |
| 3603 | |
| 3604 // set up the mark word | |
| 3605 movptr(Address(top, oopDesc::mark_offset_in_bytes()), (intptr_t)markOopDesc::prototype()->copy_set_hash(0x2)); | |
| 3606 // set the length to the remaining space | |
| 3607 subptr(t1, typeArrayOopDesc::header_size(T_INT)); | |
| 3608 addptr(t1, (int32_t)ThreadLocalAllocBuffer::alignment_reserve()); | |
| 3609 shlptr(t1, log2_intptr(HeapWordSize/sizeof(jint))); | |
| 3610 movl(Address(top, arrayOopDesc::length_offset_in_bytes()), t1); | |
| 3611 // set klass to intArrayKlass | |
| 3612 // dubious reloc why not an oop reloc? | |
| 3613 movptr(t1, ExternalAddress((address)Universe::intArrayKlassObj_addr())); | |
| 3614 // store klass last. concurrent gcs assumes klass length is valid if | |
| 3615 // klass field is not null. | |
| 3616 store_klass(top, t1); | |
| 3617 | |
| 3618 movptr(t1, top); | |
| 3619 subptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); | |
| 3620 incr_allocated_bytes(thread_reg, t1, 0); | |
| 3621 | |
| 3622 // refill the tlab with an eden allocation | |
| 3623 bind(do_refill); | |
| 3624 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); | |
| 3625 shlptr(t1, LogHeapWordSize); | |
| 3626 // allocate new tlab, address returned in top | |
| 3627 eden_allocate(top, t1, 0, t2, slow_case); | |
| 3628 | |
| 3629 // Check that t1 was preserved in eden_allocate. | |
| 3630 #ifdef ASSERT | |
| 3631 if (UseTLAB) { | |
| 3632 Label ok; | |
| 3633 Register tsize = rsi; | |
| 3634 assert_different_registers(tsize, thread_reg, t1); | |
| 3635 push(tsize); | |
| 3636 movptr(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); | |
| 3637 shlptr(tsize, LogHeapWordSize); | |
| 3638 cmpptr(t1, tsize); | |
| 3639 jcc(Assembler::equal, ok); | |
| 3640 STOP("assert(t1 != tlab size)"); | |
| 3641 should_not_reach_here(); | |
| 3642 | |
| 3643 bind(ok); | |
| 3644 pop(tsize); | |
| 3645 } | |
| 3646 #endif | |
| 3647 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top); | |
| 3648 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top); | |
| 3649 addptr(top, t1); | |
| 3650 subptr(top, (int32_t)ThreadLocalAllocBuffer::alignment_reserve_in_bytes()); | |
| 3651 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top); | |
| 3652 verify_tlab(); | |
| 3653 jmp(retry); | |
| 3654 | |
| 3655 return thread_reg; // for use by caller | |
| 3656 } | |
| 3657 | |
| 3658 void MacroAssembler::incr_allocated_bytes(Register thread, | |
| 3659 Register var_size_in_bytes, | |
| 3660 int con_size_in_bytes, | |
| 3661 Register t1) { | |
| 3662 if (!thread->is_valid()) { | |
| 3663 #ifdef _LP64 | |
| 3664 thread = r15_thread; | |
| 3665 #else | |
| 3666 assert(t1->is_valid(), "need temp reg"); | |
| 3667 thread = t1; | |
| 3668 get_thread(thread); | |
| 3669 #endif | |
| 3670 } | |
| 3671 | |
| 3672 #ifdef _LP64 | |
| 3673 if (var_size_in_bytes->is_valid()) { | |
| 3674 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); | |
| 3675 } else { | |
| 3676 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); | |
| 3677 } | |
| 3678 #else | |
| 3679 if (var_size_in_bytes->is_valid()) { | |
| 3680 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); | |
| 3681 } else { | |
| 3682 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); | |
| 3683 } | |
| 3684 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0); | |
| 3685 #endif | |
| 3686 } | |
| 3687 | |
| 3688 void MacroAssembler::fp_runtime_fallback(address runtime_entry, int nb_args, int num_fpu_regs_in_use) { | |
| 3689 pusha(); | |
| 3690 | |
| 3691 // if we are coming from c1, xmm registers may be live | |
| 3692 int off = 0; | |
| 3693 if (UseSSE == 1) { | |
| 3694 subptr(rsp, sizeof(jdouble)*8); | |
| 3695 movflt(Address(rsp,off++*sizeof(jdouble)),xmm0); | |
| 3696 movflt(Address(rsp,off++*sizeof(jdouble)),xmm1); | |
| 3697 movflt(Address(rsp,off++*sizeof(jdouble)),xmm2); | |
| 3698 movflt(Address(rsp,off++*sizeof(jdouble)),xmm3); | |
| 3699 movflt(Address(rsp,off++*sizeof(jdouble)),xmm4); | |
| 3700 movflt(Address(rsp,off++*sizeof(jdouble)),xmm5); | |
| 3701 movflt(Address(rsp,off++*sizeof(jdouble)),xmm6); | |
| 3702 movflt(Address(rsp,off++*sizeof(jdouble)),xmm7); | |
| 3703 } else if (UseSSE >= 2) { | |
| 3704 #ifdef COMPILER2 | |
| 3705 if (MaxVectorSize > 16) { | |
| 3706 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); | |
| 3707 // Save upper half of YMM registes | |
| 3708 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 3709 vextractf128h(Address(rsp, 0),xmm0); | |
| 3710 vextractf128h(Address(rsp, 16),xmm1); | |
| 3711 vextractf128h(Address(rsp, 32),xmm2); | |
| 3712 vextractf128h(Address(rsp, 48),xmm3); | |
| 3713 vextractf128h(Address(rsp, 64),xmm4); | |
| 3714 vextractf128h(Address(rsp, 80),xmm5); | |
| 3715 vextractf128h(Address(rsp, 96),xmm6); | |
| 3716 vextractf128h(Address(rsp,112),xmm7); | |
| 3717 #ifdef _LP64 | |
| 3718 vextractf128h(Address(rsp,128),xmm8); | |
| 3719 vextractf128h(Address(rsp,144),xmm9); | |
| 3720 vextractf128h(Address(rsp,160),xmm10); | |
| 3721 vextractf128h(Address(rsp,176),xmm11); | |
| 3722 vextractf128h(Address(rsp,192),xmm12); | |
| 3723 vextractf128h(Address(rsp,208),xmm13); | |
| 3724 vextractf128h(Address(rsp,224),xmm14); | |
| 3725 vextractf128h(Address(rsp,240),xmm15); | |
| 3726 #endif | |
| 3727 } | |
| 3728 #endif | |
| 3729 // Save whole 128bit (16 bytes) XMM regiters | |
| 3730 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 3731 movdqu(Address(rsp,off++*16),xmm0); | |
| 3732 movdqu(Address(rsp,off++*16),xmm1); | |
| 3733 movdqu(Address(rsp,off++*16),xmm2); | |
| 3734 movdqu(Address(rsp,off++*16),xmm3); | |
| 3735 movdqu(Address(rsp,off++*16),xmm4); | |
| 3736 movdqu(Address(rsp,off++*16),xmm5); | |
| 3737 movdqu(Address(rsp,off++*16),xmm6); | |
| 3738 movdqu(Address(rsp,off++*16),xmm7); | |
| 3739 #ifdef _LP64 | |
| 3740 movdqu(Address(rsp,off++*16),xmm8); | |
| 3741 movdqu(Address(rsp,off++*16),xmm9); | |
| 3742 movdqu(Address(rsp,off++*16),xmm10); | |
| 3743 movdqu(Address(rsp,off++*16),xmm11); | |
| 3744 movdqu(Address(rsp,off++*16),xmm12); | |
| 3745 movdqu(Address(rsp,off++*16),xmm13); | |
| 3746 movdqu(Address(rsp,off++*16),xmm14); | |
| 3747 movdqu(Address(rsp,off++*16),xmm15); | |
| 3748 #endif | |
| 3749 } | |
| 3750 | |
| 3751 // Preserve registers across runtime call | |
| 3752 int incoming_argument_and_return_value_offset = -1; | |
| 3753 if (num_fpu_regs_in_use > 1) { | |
| 3754 // Must preserve all other FPU regs (could alternatively convert | |
| 3755 // SharedRuntime::dsin, dcos etc. into assembly routines known not to trash | |
| 3756 // FPU state, but can not trust C compiler) | |
| 3757 NEEDS_CLEANUP; | |
| 3758 // NOTE that in this case we also push the incoming argument(s) to | |
| 3759 // the stack and restore it later; we also use this stack slot to | |
| 3760 // hold the return value from dsin, dcos etc. | |
| 3761 for (int i = 0; i < num_fpu_regs_in_use; i++) { | |
| 3762 subptr(rsp, sizeof(jdouble)); | |
| 3763 fstp_d(Address(rsp, 0)); | |
| 3764 } | |
| 3765 incoming_argument_and_return_value_offset = sizeof(jdouble)*(num_fpu_regs_in_use-1); | |
| 3766 for (int i = nb_args-1; i >= 0; i--) { | |
| 3767 fld_d(Address(rsp, incoming_argument_and_return_value_offset-i*sizeof(jdouble))); | |
| 3768 } | |
| 3769 } | |
| 3770 | |
| 3771 subptr(rsp, nb_args*sizeof(jdouble)); | |
| 3772 for (int i = 0; i < nb_args; i++) { | |
| 3773 fstp_d(Address(rsp, i*sizeof(jdouble))); | |
| 3774 } | |
| 3775 | |
| 3776 #ifdef _LP64 | |
| 3777 if (nb_args > 0) { | |
| 3778 movdbl(xmm0, Address(rsp, 0)); | |
| 3779 } | |
| 3780 if (nb_args > 1) { | |
| 3781 movdbl(xmm1, Address(rsp, sizeof(jdouble))); | |
| 3782 } | |
| 3783 assert(nb_args <= 2, "unsupported number of args"); | |
| 3784 #endif // _LP64 | |
| 3785 | |
| 3786 // NOTE: we must not use call_VM_leaf here because that requires a | |
| 3787 // complete interpreter frame in debug mode -- same bug as 4387334 | |
| 3788 // MacroAssembler::call_VM_leaf_base is perfectly safe and will | |
| 3789 // do proper 64bit abi | |
| 3790 | |
| 3791 NEEDS_CLEANUP; | |
| 3792 // Need to add stack banging before this runtime call if it needs to | |
| 3793 // be taken; however, there is no generic stack banging routine at | |
| 3794 // the MacroAssembler level | |
| 3795 | |
| 3796 MacroAssembler::call_VM_leaf_base(runtime_entry, 0); | |
| 3797 | |
| 3798 #ifdef _LP64 | |
| 3799 movsd(Address(rsp, 0), xmm0); | |
| 3800 fld_d(Address(rsp, 0)); | |
| 3801 #endif // _LP64 | |
| 3802 addptr(rsp, sizeof(jdouble) * nb_args); | |
| 3803 if (num_fpu_regs_in_use > 1) { | |
| 3804 // Must save return value to stack and then restore entire FPU | |
| 3805 // stack except incoming arguments | |
| 3806 fstp_d(Address(rsp, incoming_argument_and_return_value_offset)); | |
| 3807 for (int i = 0; i < num_fpu_regs_in_use - nb_args; i++) { | |
| 3808 fld_d(Address(rsp, 0)); | |
| 3809 addptr(rsp, sizeof(jdouble)); | |
| 3810 } | |
| 3811 fld_d(Address(rsp, (nb_args-1)*sizeof(jdouble))); | |
| 3812 addptr(rsp, sizeof(jdouble) * nb_args); | |
| 3813 } | |
| 3814 | |
| 3815 off = 0; | |
| 3816 if (UseSSE == 1) { | |
| 3817 movflt(xmm0, Address(rsp,off++*sizeof(jdouble))); | |
| 3818 movflt(xmm1, Address(rsp,off++*sizeof(jdouble))); | |
| 3819 movflt(xmm2, Address(rsp,off++*sizeof(jdouble))); | |
| 3820 movflt(xmm3, Address(rsp,off++*sizeof(jdouble))); | |
| 3821 movflt(xmm4, Address(rsp,off++*sizeof(jdouble))); | |
| 3822 movflt(xmm5, Address(rsp,off++*sizeof(jdouble))); | |
| 3823 movflt(xmm6, Address(rsp,off++*sizeof(jdouble))); | |
| 3824 movflt(xmm7, Address(rsp,off++*sizeof(jdouble))); | |
| 3825 addptr(rsp, sizeof(jdouble)*8); | |
| 3826 } else if (UseSSE >= 2) { | |
| 3827 // Restore whole 128bit (16 bytes) XMM regiters | |
| 3828 movdqu(xmm0, Address(rsp,off++*16)); | |
| 3829 movdqu(xmm1, Address(rsp,off++*16)); | |
| 3830 movdqu(xmm2, Address(rsp,off++*16)); | |
| 3831 movdqu(xmm3, Address(rsp,off++*16)); | |
| 3832 movdqu(xmm4, Address(rsp,off++*16)); | |
| 3833 movdqu(xmm5, Address(rsp,off++*16)); | |
| 3834 movdqu(xmm6, Address(rsp,off++*16)); | |
| 3835 movdqu(xmm7, Address(rsp,off++*16)); | |
| 3836 #ifdef _LP64 | |
| 3837 movdqu(xmm8, Address(rsp,off++*16)); | |
| 3838 movdqu(xmm9, Address(rsp,off++*16)); | |
| 3839 movdqu(xmm10, Address(rsp,off++*16)); | |
| 3840 movdqu(xmm11, Address(rsp,off++*16)); | |
| 3841 movdqu(xmm12, Address(rsp,off++*16)); | |
| 3842 movdqu(xmm13, Address(rsp,off++*16)); | |
| 3843 movdqu(xmm14, Address(rsp,off++*16)); | |
| 3844 movdqu(xmm15, Address(rsp,off++*16)); | |
| 3845 #endif | |
| 3846 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 3847 #ifdef COMPILER2 | |
| 3848 if (MaxVectorSize > 16) { | |
| 3849 // Restore upper half of YMM registes. | |
| 3850 vinsertf128h(xmm0, Address(rsp, 0)); | |
| 3851 vinsertf128h(xmm1, Address(rsp, 16)); | |
| 3852 vinsertf128h(xmm2, Address(rsp, 32)); | |
| 3853 vinsertf128h(xmm3, Address(rsp, 48)); | |
| 3854 vinsertf128h(xmm4, Address(rsp, 64)); | |
| 3855 vinsertf128h(xmm5, Address(rsp, 80)); | |
| 3856 vinsertf128h(xmm6, Address(rsp, 96)); | |
| 3857 vinsertf128h(xmm7, Address(rsp,112)); | |
| 3858 #ifdef _LP64 | |
| 3859 vinsertf128h(xmm8, Address(rsp,128)); | |
| 3860 vinsertf128h(xmm9, Address(rsp,144)); | |
| 3861 vinsertf128h(xmm10, Address(rsp,160)); | |
| 3862 vinsertf128h(xmm11, Address(rsp,176)); | |
| 3863 vinsertf128h(xmm12, Address(rsp,192)); | |
| 3864 vinsertf128h(xmm13, Address(rsp,208)); | |
| 3865 vinsertf128h(xmm14, Address(rsp,224)); | |
| 3866 vinsertf128h(xmm15, Address(rsp,240)); | |
| 3867 #endif | |
| 3868 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
| 3869 } | |
| 3870 #endif | |
| 3871 } | |
| 3872 popa(); | |
| 3873 } | |
| 3874 | |
| 3875 static const double pi_4 = 0.7853981633974483; | |
| 3876 | |
| 3877 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) { | |
| 3878 // A hand-coded argument reduction for values in fabs(pi/4, pi/2) | |
| 3879 // was attempted in this code; unfortunately it appears that the | |
| 3880 // switch to 80-bit precision and back causes this to be | |
| 3881 // unprofitable compared with simply performing a runtime call if | |
| 3882 // the argument is out of the (-pi/4, pi/4) range. | |
| 3883 | |
| 3884 Register tmp = noreg; | |
| 3885 if (!VM_Version::supports_cmov()) { | |
| 3886 // fcmp needs a temporary so preserve rbx, | |
| 3887 tmp = rbx; | |
| 3888 push(tmp); | |
| 3889 } | |
| 3890 | |
| 3891 Label slow_case, done; | |
| 3892 | |
| 3893 ExternalAddress pi4_adr = (address)&pi_4; | |
| 3894 if (reachable(pi4_adr)) { | |
| 3895 // x ?<= pi/4 | |
| 3896 fld_d(pi4_adr); | |
| 3897 fld_s(1); // Stack: X PI/4 X | |
| 3898 fabs(); // Stack: |X| PI/4 X | |
| 3899 fcmp(tmp); | |
| 3900 jcc(Assembler::above, slow_case); | |
| 3901 | |
| 3902 // fastest case: -pi/4 <= x <= pi/4 | |
| 3903 switch(trig) { | |
| 3904 case 's': | |
| 3905 fsin(); | |
| 3906 break; | |
| 3907 case 'c': | |
| 3908 fcos(); | |
| 3909 break; | |
| 3910 case 't': | |
| 3911 ftan(); | |
| 3912 break; | |
| 3913 default: | |
| 3914 assert(false, "bad intrinsic"); | |
| 3915 break; | |
| 3916 } | |
| 3917 jmp(done); | |
| 3918 } | |
| 3919 | |
| 3920 // slow case: runtime call | |
| 3921 bind(slow_case); | |
| 3922 | |
| 3923 switch(trig) { | |
| 3924 case 's': | |
| 3925 { | |
| 3926 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 1, num_fpu_regs_in_use); | |
| 3927 } | |
| 3928 break; | |
| 3929 case 'c': | |
| 3930 { | |
| 3931 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 1, num_fpu_regs_in_use); | |
| 3932 } | |
| 3933 break; | |
| 3934 case 't': | |
| 3935 { | |
| 3936 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 1, num_fpu_regs_in_use); | |
| 3937 } | |
| 3938 break; | |
| 3939 default: | |
| 3940 assert(false, "bad intrinsic"); | |
| 3941 break; | |
| 3942 } | |
| 3943 | |
| 3944 // Come here with result in F-TOS | |
| 3945 bind(done); | |
| 3946 | |
| 3947 if (tmp != noreg) { | |
| 3948 pop(tmp); | |
| 3949 } | |
| 3950 } | |
| 3951 | |
| 3952 | |
| 3953 // Look up the method for a megamorphic invokeinterface call. | |
| 3954 // The target method is determined by <intf_klass, itable_index>. | |
| 3955 // The receiver klass is in recv_klass. | |
| 3956 // On success, the result will be in method_result, and execution falls through. | |
| 3957 // On failure, execution transfers to the given label. | |
| 3958 void MacroAssembler::lookup_interface_method(Register recv_klass, | |
| 3959 Register intf_klass, | |
| 3960 RegisterOrConstant itable_index, | |
| 3961 Register method_result, | |
| 3962 Register scan_temp, | |
| 3963 Label& L_no_such_interface) { | |
| 3964 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); | |
| 3965 assert(itable_index.is_constant() || itable_index.as_register() == method_result, | |
| 3966 "caller must use same register for non-constant itable index as for method"); | |
| 3967 | |
| 3968 // Compute start of first itableOffsetEntry (which is at the end of the vtable) | |
| 3969 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize; | |
| 3970 int itentry_off = itableMethodEntry::method_offset_in_bytes(); | |
| 3971 int scan_step = itableOffsetEntry::size() * wordSize; | |
| 3972 int vte_size = vtableEntry::size() * wordSize; | |
| 3973 Address::ScaleFactor times_vte_scale = Address::times_ptr; | |
| 3974 assert(vte_size == wordSize, "else adjust times_vte_scale"); | |
| 3975 | |
| 3976 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize)); | |
| 3977 | |
| 3978 // %%% Could store the aligned, prescaled offset in the klassoop. | |
| 3979 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base)); | |
| 3980 if (HeapWordsPerLong > 1) { | |
| 3981 // Round up to align_object_offset boundary | |
| 3982 // see code for InstanceKlass::start_of_itable! | |
| 3983 round_to(scan_temp, BytesPerLong); | |
| 3984 } | |
| 3985 | |
| 3986 // Adjust recv_klass by scaled itable_index, so we can free itable_index. | |
| 3987 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); | |
| 3988 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off)); | |
| 3989 | |
| 3990 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { | |
| 3991 // if (scan->interface() == intf) { | |
| 3992 // result = (klass + scan->offset() + itable_index); | |
| 3993 // } | |
| 3994 // } | |
| 3995 Label search, found_method; | |
| 3996 | |
| 3997 for (int peel = 1; peel >= 0; peel--) { | |
| 3998 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes())); | |
| 3999 cmpptr(intf_klass, method_result); | |
| 4000 | |
| 4001 if (peel) { | |
| 4002 jccb(Assembler::equal, found_method); | |
| 4003 } else { | |
| 4004 jccb(Assembler::notEqual, search); | |
| 4005 // (invert the test to fall through to found_method...) | |
| 4006 } | |
| 4007 | |
| 4008 if (!peel) break; | |
| 4009 | |
| 4010 bind(search); | |
| 4011 | |
| 4012 // Check that the previous entry is non-null. A null entry means that | |
| 4013 // the receiver class doesn't implement the interface, and wasn't the | |
| 4014 // same as when the caller was compiled. | |
| 4015 testptr(method_result, method_result); | |
| 4016 jcc(Assembler::zero, L_no_such_interface); | |
| 4017 addptr(scan_temp, scan_step); | |
| 4018 } | |
| 4019 | |
| 4020 bind(found_method); | |
| 4021 | |
| 4022 // Got a hit. | |
| 4023 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes())); | |
| 4024 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1)); | |
| 4025 } | |
| 4026 | |
| 4027 | |
| 4028 // virtual method calling | |
| 4029 void MacroAssembler::lookup_virtual_method(Register recv_klass, | |
| 4030 RegisterOrConstant vtable_index, | |
| 4031 Register method_result) { | |
| 4032 const int base = InstanceKlass::vtable_start_offset() * wordSize; | |
| 4033 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below"); | |
| 4034 Address vtable_entry_addr(recv_klass, | |
| 4035 vtable_index, Address::times_ptr, | |
| 4036 base + vtableEntry::method_offset_in_bytes()); | |
| 4037 movptr(method_result, vtable_entry_addr); | |
| 4038 } | |
| 4039 | |
| 4040 | |
| 4041 void MacroAssembler::check_klass_subtype(Register sub_klass, | |
| 4042 Register super_klass, | |
| 4043 Register temp_reg, | |
| 4044 Label& L_success) { | |
| 4045 Label L_failure; | |
| 4046 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL); | |
| 4047 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL); | |
| 4048 bind(L_failure); | |
| 4049 } | |
| 4050 | |
| 4051 | |
| 4052 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, | |
| 4053 Register super_klass, | |
| 4054 Register temp_reg, | |
| 4055 Label* L_success, | |
| 4056 Label* L_failure, | |
| 4057 Label* L_slow_path, | |
| 4058 RegisterOrConstant super_check_offset) { | |
| 4059 assert_different_registers(sub_klass, super_klass, temp_reg); | |
| 4060 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); | |
| 4061 if (super_check_offset.is_register()) { | |
| 4062 assert_different_registers(sub_klass, super_klass, | |
| 4063 super_check_offset.as_register()); | |
| 4064 } else if (must_load_sco) { | |
| 4065 assert(temp_reg != noreg, "supply either a temp or a register offset"); | |
| 4066 } | |
| 4067 | |
| 4068 Label L_fallthrough; | |
| 4069 int label_nulls = 0; | |
| 4070 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
| 4071 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
| 4072 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } | |
| 4073 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
| 4074 | |
| 4075 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
| 4076 int sco_offset = in_bytes(Klass::super_check_offset_offset()); | |
| 4077 Address super_check_offset_addr(super_klass, sco_offset); | |
| 4078 | |
| 4079 // Hacked jcc, which "knows" that L_fallthrough, at least, is in | |
| 4080 // range of a jccb. If this routine grows larger, reconsider at | |
| 4081 // least some of these. | |
| 4082 #define local_jcc(assembler_cond, label) \ | |
| 4083 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \ | |
| 4084 else jcc( assembler_cond, label) /*omit semi*/ | |
| 4085 | |
| 4086 // Hacked jmp, which may only be used just before L_fallthrough. | |
| 4087 #define final_jmp(label) \ | |
| 4088 if (&(label) == &L_fallthrough) { /*do nothing*/ } \ | |
| 4089 else jmp(label) /*omit semi*/ | |
| 4090 | |
| 4091 // If the pointers are equal, we are done (e.g., String[] elements). | |
| 4092 // This self-check enables sharing of secondary supertype arrays among | |
| 4093 // non-primary types such as array-of-interface. Otherwise, each such | |
| 4094 // type would need its own customized SSA. | |
| 4095 // We move this check to the front of the fast path because many | |
| 4096 // type checks are in fact trivially successful in this manner, | |
| 4097 // so we get a nicely predicted branch right at the start of the check. | |
| 4098 cmpptr(sub_klass, super_klass); | |
| 4099 local_jcc(Assembler::equal, *L_success); | |
| 4100 | |
| 4101 // Check the supertype display: | |
| 4102 if (must_load_sco) { | |
| 4103 // Positive movl does right thing on LP64. | |
| 4104 movl(temp_reg, super_check_offset_addr); | |
| 4105 super_check_offset = RegisterOrConstant(temp_reg); | |
| 4106 } | |
| 4107 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0); | |
| 4108 cmpptr(super_klass, super_check_addr); // load displayed supertype | |
| 4109 | |
| 4110 // This check has worked decisively for primary supers. | |
| 4111 // Secondary supers are sought in the super_cache ('super_cache_addr'). | |
| 4112 // (Secondary supers are interfaces and very deeply nested subtypes.) | |
| 4113 // This works in the same check above because of a tricky aliasing | |
| 4114 // between the super_cache and the primary super display elements. | |
| 4115 // (The 'super_check_addr' can address either, as the case requires.) | |
| 4116 // Note that the cache is updated below if it does not help us find | |
| 4117 // what we need immediately. | |
| 4118 // So if it was a primary super, we can just fail immediately. | |
| 4119 // Otherwise, it's the slow path for us (no success at this point). | |
| 4120 | |
| 4121 if (super_check_offset.is_register()) { | |
| 4122 local_jcc(Assembler::equal, *L_success); | |
| 4123 cmpl(super_check_offset.as_register(), sc_offset); | |
| 4124 if (L_failure == &L_fallthrough) { | |
| 4125 local_jcc(Assembler::equal, *L_slow_path); | |
| 4126 } else { | |
| 4127 local_jcc(Assembler::notEqual, *L_failure); | |
| 4128 final_jmp(*L_slow_path); | |
| 4129 } | |
| 4130 } else if (super_check_offset.as_constant() == sc_offset) { | |
| 4131 // Need a slow path; fast failure is impossible. | |
| 4132 if (L_slow_path == &L_fallthrough) { | |
| 4133 local_jcc(Assembler::equal, *L_success); | |
| 4134 } else { | |
| 4135 local_jcc(Assembler::notEqual, *L_slow_path); | |
| 4136 final_jmp(*L_success); | |
| 4137 } | |
| 4138 } else { | |
| 4139 // No slow path; it's a fast decision. | |
| 4140 if (L_failure == &L_fallthrough) { | |
| 4141 local_jcc(Assembler::equal, *L_success); | |
| 4142 } else { | |
| 4143 local_jcc(Assembler::notEqual, *L_failure); | |
| 4144 final_jmp(*L_success); | |
| 4145 } | |
| 4146 } | |
| 4147 | |
| 4148 bind(L_fallthrough); | |
| 4149 | |
| 4150 #undef local_jcc | |
| 4151 #undef final_jmp | |
| 4152 } | |
| 4153 | |
| 4154 | |
| 4155 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, | |
| 4156 Register super_klass, | |
| 4157 Register temp_reg, | |
| 4158 Register temp2_reg, | |
| 4159 Label* L_success, | |
| 4160 Label* L_failure, | |
| 4161 bool set_cond_codes) { | |
| 4162 assert_different_registers(sub_klass, super_klass, temp_reg); | |
| 4163 if (temp2_reg != noreg) | |
| 4164 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg); | |
| 4165 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg) | |
| 4166 | |
| 4167 Label L_fallthrough; | |
| 4168 int label_nulls = 0; | |
| 4169 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
| 4170 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
| 4171 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
| 4172 | |
| 4173 // a couple of useful fields in sub_klass: | |
| 4174 int ss_offset = in_bytes(Klass::secondary_supers_offset()); | |
| 4175 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
| 4176 Address secondary_supers_addr(sub_klass, ss_offset); | |
| 4177 Address super_cache_addr( sub_klass, sc_offset); | |
| 4178 | |
| 4179 // Do a linear scan of the secondary super-klass chain. | |
| 4180 // This code is rarely used, so simplicity is a virtue here. | |
| 4181 // The repne_scan instruction uses fixed registers, which we must spill. | |
| 4182 // Don't worry too much about pre-existing connections with the input regs. | |
| 4183 | |
| 4184 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super) | |
| 4185 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter) | |
| 4186 | |
| 4187 // Get super_klass value into rax (even if it was in rdi or rcx). | |
| 4188 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false; | |
| 4189 if (super_klass != rax || UseCompressedOops) { | |
| 4190 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; } | |
| 4191 mov(rax, super_klass); | |
| 4192 } | |
| 4193 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; } | |
| 4194 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; } | |
| 4195 | |
| 4196 #ifndef PRODUCT | |
| 4197 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; | |
| 4198 ExternalAddress pst_counter_addr((address) pst_counter); | |
| 4199 NOT_LP64( incrementl(pst_counter_addr) ); | |
| 4200 LP64_ONLY( lea(rcx, pst_counter_addr) ); | |
| 4201 LP64_ONLY( incrementl(Address(rcx, 0)) ); | |
| 4202 #endif //PRODUCT | |
| 4203 | |
| 4204 // We will consult the secondary-super array. | |
| 4205 movptr(rdi, secondary_supers_addr); | |
| 4206 // Load the array length. (Positive movl does right thing on LP64.) | |
| 4207 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes())); | |
| 4208 // Skip to start of data. | |
| 4209 addptr(rdi, Array<Klass*>::base_offset_in_bytes()); | |
| 4210 | |
| 4211 // Scan RCX words at [RDI] for an occurrence of RAX. | |
| 4212 // Set NZ/Z based on last compare. | |
| 4213 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does | |
| 4214 // not change flags (only scas instruction which is repeated sets flags). | |
| 4215 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found. | |
| 4216 | |
| 4217 testptr(rax,rax); // Set Z = 0 | |
| 4218 repne_scan(); | |
| 4219 | |
| 4220 // Unspill the temp. registers: | |
| 4221 if (pushed_rdi) pop(rdi); | |
| 4222 if (pushed_rcx) pop(rcx); | |
| 4223 if (pushed_rax) pop(rax); | |
| 4224 | |
| 4225 if (set_cond_codes) { | |
| 4226 // Special hack for the AD files: rdi is guaranteed non-zero. | |
| 4227 assert(!pushed_rdi, "rdi must be left non-NULL"); | |
| 4228 // Also, the condition codes are properly set Z/NZ on succeed/failure. | |
| 4229 } | |
| 4230 | |
| 4231 if (L_failure == &L_fallthrough) | |
| 4232 jccb(Assembler::notEqual, *L_failure); | |
| 4233 else jcc(Assembler::notEqual, *L_failure); | |
| 4234 | |
| 4235 // Success. Cache the super we found and proceed in triumph. | |
| 4236 movptr(super_cache_addr, super_klass); | |
| 4237 | |
| 4238 if (L_success != &L_fallthrough) { | |
| 4239 jmp(*L_success); | |
| 4240 } | |
| 4241 | |
| 4242 #undef IS_A_TEMP | |
| 4243 | |
| 4244 bind(L_fallthrough); | |
| 4245 } | |
| 4246 | |
| 4247 | |
| 4248 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) { | |
| 4249 if (VM_Version::supports_cmov()) { | |
| 4250 cmovl(cc, dst, src); | |
| 4251 } else { | |
| 4252 Label L; | |
| 4253 jccb(negate_condition(cc), L); | |
| 4254 movl(dst, src); | |
| 4255 bind(L); | |
| 4256 } | |
| 4257 } | |
| 4258 | |
| 4259 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) { | |
| 4260 if (VM_Version::supports_cmov()) { | |
| 4261 cmovl(cc, dst, src); | |
| 4262 } else { | |
| 4263 Label L; | |
| 4264 jccb(negate_condition(cc), L); | |
| 4265 movl(dst, src); | |
| 4266 bind(L); | |
| 4267 } | |
| 4268 } | |
| 4269 | |
| 4270 void MacroAssembler::verify_oop(Register reg, const char* s) { | |
| 4271 if (!VerifyOops) return; | |
| 4272 | |
| 4273 // Pass register number to verify_oop_subroutine | |
|
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4274 const char* b = NULL; |
|
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4275 { |
|
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|
4276 ResourceMark rm; |
|
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|
4277 stringStream ss; |
|
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|
4278 ss.print("verify_oop: %s: %s", reg->name(), s); |
|
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|
4279 b = code_string(ss.as_string()); |
|
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|
4280 } |
| 7199 | 4281 BLOCK_COMMENT("verify_oop {"); |
| 4282 #ifdef _LP64 | |
| 4283 push(rscratch1); // save r10, trashed by movptr() | |
| 4284 #endif | |
| 4285 push(rax); // save rax, | |
| 4286 push(reg); // pass register argument | |
| 4287 ExternalAddress buffer((address) b); | |
| 4288 // avoid using pushptr, as it modifies scratch registers | |
| 4289 // and our contract is not to modify anything | |
| 4290 movptr(rax, buffer.addr()); | |
| 4291 push(rax); | |
| 4292 // call indirectly to solve generation ordering problem | |
| 4293 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); | |
| 4294 call(rax); | |
| 4295 // Caller pops the arguments (oop, message) and restores rax, r10 | |
| 4296 BLOCK_COMMENT("} verify_oop"); | |
| 4297 } | |
| 4298 | |
| 4299 | |
| 4300 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, | |
| 4301 Register tmp, | |
| 4302 int offset) { | |
| 4303 intptr_t value = *delayed_value_addr; | |
| 4304 if (value != 0) | |
| 4305 return RegisterOrConstant(value + offset); | |
| 4306 | |
| 4307 // load indirectly to solve generation ordering problem | |
| 4308 movptr(tmp, ExternalAddress((address) delayed_value_addr)); | |
| 4309 | |
| 4310 #ifdef ASSERT | |
| 4311 { Label L; | |
| 4312 testptr(tmp, tmp); | |
| 4313 if (WizardMode) { | |
|
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4314 const char* buf = NULL; |
|
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4315 { |
|
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4316 ResourceMark rm; |
|
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4317 stringStream ss; |
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4318 ss.print("DelayedValue="INTPTR_FORMAT, delayed_value_addr[1]); |
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4319 buf = code_string(ss.as_string()); |
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4320 } |
| 7199 | 4321 jcc(Assembler::notZero, L); |
| 4322 STOP(buf); | |
| 4323 } else { | |
| 4324 jccb(Assembler::notZero, L); | |
| 4325 hlt(); | |
| 4326 } | |
| 4327 bind(L); | |
| 4328 } | |
| 4329 #endif | |
| 4330 | |
| 4331 if (offset != 0) | |
| 4332 addptr(tmp, offset); | |
| 4333 | |
| 4334 return RegisterOrConstant(tmp); | |
| 4335 } | |
| 4336 | |
| 4337 | |
| 4338 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, | |
| 4339 int extra_slot_offset) { | |
| 4340 // cf. TemplateTable::prepare_invoke(), if (load_receiver). | |
| 4341 int stackElementSize = Interpreter::stackElementSize; | |
| 4342 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0); | |
| 4343 #ifdef ASSERT | |
| 4344 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1); | |
| 4345 assert(offset1 - offset == stackElementSize, "correct arithmetic"); | |
| 4346 #endif | |
| 4347 Register scale_reg = noreg; | |
| 4348 Address::ScaleFactor scale_factor = Address::no_scale; | |
| 4349 if (arg_slot.is_constant()) { | |
| 4350 offset += arg_slot.as_constant() * stackElementSize; | |
| 4351 } else { | |
| 4352 scale_reg = arg_slot.as_register(); | |
| 4353 scale_factor = Address::times(stackElementSize); | |
| 4354 } | |
| 4355 offset += wordSize; // return PC is on stack | |
| 4356 return Address(rsp, scale_reg, scale_factor, offset); | |
| 4357 } | |
| 4358 | |
| 4359 | |
| 4360 void MacroAssembler::verify_oop_addr(Address addr, const char* s) { | |
| 4361 if (!VerifyOops) return; | |
| 4362 | |
| 4363 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord); | |
| 4364 // Pass register number to verify_oop_subroutine | |
|
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4365 const char* b = NULL; |
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4366 { |
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4367 ResourceMark rm; |
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4368 stringStream ss; |
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4369 ss.print("verify_oop_addr: %s", s); |
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4370 b = code_string(ss.as_string()); |
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|
4371 } |
| 7199 | 4372 #ifdef _LP64 |
| 4373 push(rscratch1); // save r10, trashed by movptr() | |
| 4374 #endif | |
| 4375 push(rax); // save rax, | |
| 4376 // addr may contain rsp so we will have to adjust it based on the push | |
| 4377 // we just did (and on 64 bit we do two pushes) | |
| 4378 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which | |
| 4379 // stores rax into addr which is backwards of what was intended. | |
| 4380 if (addr.uses(rsp)) { | |
| 4381 lea(rax, addr); | |
| 4382 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord)); | |
| 4383 } else { | |
| 4384 pushptr(addr); | |
| 4385 } | |
| 4386 | |
| 4387 ExternalAddress buffer((address) b); | |
| 4388 // pass msg argument | |
| 4389 // avoid using pushptr, as it modifies scratch registers | |
| 4390 // and our contract is not to modify anything | |
| 4391 movptr(rax, buffer.addr()); | |
| 4392 push(rax); | |
| 4393 | |
| 4394 // call indirectly to solve generation ordering problem | |
| 4395 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); | |
| 4396 call(rax); | |
| 4397 // Caller pops the arguments (addr, message) and restores rax, r10. | |
| 4398 } | |
| 4399 | |
| 4400 void MacroAssembler::verify_tlab() { | |
| 4401 #ifdef ASSERT | |
| 4402 if (UseTLAB && VerifyOops) { | |
| 4403 Label next, ok; | |
| 4404 Register t1 = rsi; | |
| 4405 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread); | |
| 4406 | |
| 4407 push(t1); | |
| 4408 NOT_LP64(push(thread_reg)); | |
| 4409 NOT_LP64(get_thread(thread_reg)); | |
| 4410 | |
| 4411 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
| 4412 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); | |
| 4413 jcc(Assembler::aboveEqual, next); | |
| 4414 STOP("assert(top >= start)"); | |
| 4415 should_not_reach_here(); | |
| 4416 | |
| 4417 bind(next); | |
| 4418 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); | |
| 4419 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
| 4420 jcc(Assembler::aboveEqual, ok); | |
| 4421 STOP("assert(top <= end)"); | |
| 4422 should_not_reach_here(); | |
| 4423 | |
| 4424 bind(ok); | |
| 4425 NOT_LP64(pop(thread_reg)); | |
| 4426 pop(t1); | |
| 4427 } | |
| 4428 #endif | |
| 4429 } | |
| 4430 | |
| 4431 class ControlWord { | |
| 4432 public: | |
| 4433 int32_t _value; | |
| 4434 | |
| 4435 int rounding_control() const { return (_value >> 10) & 3 ; } | |
| 4436 int precision_control() const { return (_value >> 8) & 3 ; } | |
| 4437 bool precision() const { return ((_value >> 5) & 1) != 0; } | |
| 4438 bool underflow() const { return ((_value >> 4) & 1) != 0; } | |
| 4439 bool overflow() const { return ((_value >> 3) & 1) != 0; } | |
| 4440 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } | |
| 4441 bool denormalized() const { return ((_value >> 1) & 1) != 0; } | |
| 4442 bool invalid() const { return ((_value >> 0) & 1) != 0; } | |
| 4443 | |
| 4444 void print() const { | |
| 4445 // rounding control | |
| 4446 const char* rc; | |
| 4447 switch (rounding_control()) { | |
| 4448 case 0: rc = "round near"; break; | |
| 4449 case 1: rc = "round down"; break; | |
| 4450 case 2: rc = "round up "; break; | |
| 4451 case 3: rc = "chop "; break; | |
| 4452 }; | |
| 4453 // precision control | |
| 4454 const char* pc; | |
| 4455 switch (precision_control()) { | |
| 4456 case 0: pc = "24 bits "; break; | |
| 4457 case 1: pc = "reserved"; break; | |
| 4458 case 2: pc = "53 bits "; break; | |
| 4459 case 3: pc = "64 bits "; break; | |
| 4460 }; | |
| 4461 // flags | |
| 4462 char f[9]; | |
| 4463 f[0] = ' '; | |
| 4464 f[1] = ' '; | |
| 4465 f[2] = (precision ()) ? 'P' : 'p'; | |
| 4466 f[3] = (underflow ()) ? 'U' : 'u'; | |
| 4467 f[4] = (overflow ()) ? 'O' : 'o'; | |
| 4468 f[5] = (zero_divide ()) ? 'Z' : 'z'; | |
| 4469 f[6] = (denormalized()) ? 'D' : 'd'; | |
| 4470 f[7] = (invalid ()) ? 'I' : 'i'; | |
| 4471 f[8] = '\x0'; | |
| 4472 // output | |
| 4473 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc); | |
| 4474 } | |
| 4475 | |
| 4476 }; | |
| 4477 | |
| 4478 class StatusWord { | |
| 4479 public: | |
| 4480 int32_t _value; | |
| 4481 | |
| 4482 bool busy() const { return ((_value >> 15) & 1) != 0; } | |
| 4483 bool C3() const { return ((_value >> 14) & 1) != 0; } | |
| 4484 bool C2() const { return ((_value >> 10) & 1) != 0; } | |
| 4485 bool C1() const { return ((_value >> 9) & 1) != 0; } | |
| 4486 bool C0() const { return ((_value >> 8) & 1) != 0; } | |
| 4487 int top() const { return (_value >> 11) & 7 ; } | |
| 4488 bool error_status() const { return ((_value >> 7) & 1) != 0; } | |
| 4489 bool stack_fault() const { return ((_value >> 6) & 1) != 0; } | |
| 4490 bool precision() const { return ((_value >> 5) & 1) != 0; } | |
| 4491 bool underflow() const { return ((_value >> 4) & 1) != 0; } | |
| 4492 bool overflow() const { return ((_value >> 3) & 1) != 0; } | |
| 4493 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } | |
| 4494 bool denormalized() const { return ((_value >> 1) & 1) != 0; } | |
| 4495 bool invalid() const { return ((_value >> 0) & 1) != 0; } | |
| 4496 | |
| 4497 void print() const { | |
| 4498 // condition codes | |
| 4499 char c[5]; | |
| 4500 c[0] = (C3()) ? '3' : '-'; | |
| 4501 c[1] = (C2()) ? '2' : '-'; | |
| 4502 c[2] = (C1()) ? '1' : '-'; | |
| 4503 c[3] = (C0()) ? '0' : '-'; | |
| 4504 c[4] = '\x0'; | |
| 4505 // flags | |
| 4506 char f[9]; | |
| 4507 f[0] = (error_status()) ? 'E' : '-'; | |
| 4508 f[1] = (stack_fault ()) ? 'S' : '-'; | |
| 4509 f[2] = (precision ()) ? 'P' : '-'; | |
| 4510 f[3] = (underflow ()) ? 'U' : '-'; | |
| 4511 f[4] = (overflow ()) ? 'O' : '-'; | |
| 4512 f[5] = (zero_divide ()) ? 'Z' : '-'; | |
| 4513 f[6] = (denormalized()) ? 'D' : '-'; | |
| 4514 f[7] = (invalid ()) ? 'I' : '-'; | |
| 4515 f[8] = '\x0'; | |
| 4516 // output | |
| 4517 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top()); | |
| 4518 } | |
| 4519 | |
| 4520 }; | |
| 4521 | |
| 4522 class TagWord { | |
| 4523 public: | |
| 4524 int32_t _value; | |
| 4525 | |
| 4526 int tag_at(int i) const { return (_value >> (i*2)) & 3; } | |
| 4527 | |
| 4528 void print() const { | |
| 4529 printf("%04x", _value & 0xFFFF); | |
| 4530 } | |
| 4531 | |
| 4532 }; | |
| 4533 | |
| 4534 class FPU_Register { | |
| 4535 public: | |
| 4536 int32_t _m0; | |
| 4537 int32_t _m1; | |
| 4538 int16_t _ex; | |
| 4539 | |
| 4540 bool is_indefinite() const { | |
| 4541 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0; | |
| 4542 } | |
| 4543 | |
| 4544 void print() const { | |
| 4545 char sign = (_ex < 0) ? '-' : '+'; | |
| 4546 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " "; | |
| 4547 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind); | |
| 4548 }; | |
| 4549 | |
| 4550 }; | |
| 4551 | |
| 4552 class FPU_State { | |
| 4553 public: | |
| 4554 enum { | |
| 4555 register_size = 10, | |
| 4556 number_of_registers = 8, | |
| 4557 register_mask = 7 | |
| 4558 }; | |
| 4559 | |
| 4560 ControlWord _control_word; | |
| 4561 StatusWord _status_word; | |
| 4562 TagWord _tag_word; | |
| 4563 int32_t _error_offset; | |
| 4564 int32_t _error_selector; | |
| 4565 int32_t _data_offset; | |
| 4566 int32_t _data_selector; | |
| 4567 int8_t _register[register_size * number_of_registers]; | |
| 4568 | |
| 4569 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); } | |
| 4570 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; } | |
| 4571 | |
| 4572 const char* tag_as_string(int tag) const { | |
| 4573 switch (tag) { | |
| 4574 case 0: return "valid"; | |
| 4575 case 1: return "zero"; | |
| 4576 case 2: return "special"; | |
| 4577 case 3: return "empty"; | |
| 4578 } | |
| 4579 ShouldNotReachHere(); | |
| 4580 return NULL; | |
| 4581 } | |
| 4582 | |
| 4583 void print() const { | |
| 4584 // print computation registers | |
| 4585 { int t = _status_word.top(); | |
| 4586 for (int i = 0; i < number_of_registers; i++) { | |
| 4587 int j = (i - t) & register_mask; | |
| 4588 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j); | |
| 4589 st(j)->print(); | |
| 4590 printf(" %s\n", tag_as_string(_tag_word.tag_at(i))); | |
| 4591 } | |
| 4592 } | |
| 4593 printf("\n"); | |
| 4594 // print control registers | |
| 4595 printf("ctrl = "); _control_word.print(); printf("\n"); | |
| 4596 printf("stat = "); _status_word .print(); printf("\n"); | |
| 4597 printf("tags = "); _tag_word .print(); printf("\n"); | |
| 4598 } | |
| 4599 | |
| 4600 }; | |
| 4601 | |
| 4602 class Flag_Register { | |
| 4603 public: | |
| 4604 int32_t _value; | |
| 4605 | |
| 4606 bool overflow() const { return ((_value >> 11) & 1) != 0; } | |
| 4607 bool direction() const { return ((_value >> 10) & 1) != 0; } | |
| 4608 bool sign() const { return ((_value >> 7) & 1) != 0; } | |
| 4609 bool zero() const { return ((_value >> 6) & 1) != 0; } | |
| 4610 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; } | |
| 4611 bool parity() const { return ((_value >> 2) & 1) != 0; } | |
| 4612 bool carry() const { return ((_value >> 0) & 1) != 0; } | |
| 4613 | |
| 4614 void print() const { | |
| 4615 // flags | |
| 4616 char f[8]; | |
| 4617 f[0] = (overflow ()) ? 'O' : '-'; | |
| 4618 f[1] = (direction ()) ? 'D' : '-'; | |
| 4619 f[2] = (sign ()) ? 'S' : '-'; | |
| 4620 f[3] = (zero ()) ? 'Z' : '-'; | |
| 4621 f[4] = (auxiliary_carry()) ? 'A' : '-'; | |
| 4622 f[5] = (parity ()) ? 'P' : '-'; | |
| 4623 f[6] = (carry ()) ? 'C' : '-'; | |
| 4624 f[7] = '\x0'; | |
| 4625 // output | |
| 4626 printf("%08x flags = %s", _value, f); | |
| 4627 } | |
| 4628 | |
| 4629 }; | |
| 4630 | |
| 4631 class IU_Register { | |
| 4632 public: | |
| 4633 int32_t _value; | |
| 4634 | |
| 4635 void print() const { | |
| 4636 printf("%08x %11d", _value, _value); | |
| 4637 } | |
| 4638 | |
| 4639 }; | |
| 4640 | |
| 4641 class IU_State { | |
| 4642 public: | |
| 4643 Flag_Register _eflags; | |
| 4644 IU_Register _rdi; | |
| 4645 IU_Register _rsi; | |
| 4646 IU_Register _rbp; | |
| 4647 IU_Register _rsp; | |
| 4648 IU_Register _rbx; | |
| 4649 IU_Register _rdx; | |
| 4650 IU_Register _rcx; | |
| 4651 IU_Register _rax; | |
| 4652 | |
| 4653 void print() const { | |
| 4654 // computation registers | |
| 4655 printf("rax, = "); _rax.print(); printf("\n"); | |
| 4656 printf("rbx, = "); _rbx.print(); printf("\n"); | |
| 4657 printf("rcx = "); _rcx.print(); printf("\n"); | |
| 4658 printf("rdx = "); _rdx.print(); printf("\n"); | |
| 4659 printf("rdi = "); _rdi.print(); printf("\n"); | |
| 4660 printf("rsi = "); _rsi.print(); printf("\n"); | |
| 4661 printf("rbp, = "); _rbp.print(); printf("\n"); | |
| 4662 printf("rsp = "); _rsp.print(); printf("\n"); | |
| 4663 printf("\n"); | |
| 4664 // control registers | |
| 4665 printf("flgs = "); _eflags.print(); printf("\n"); | |
| 4666 } | |
| 4667 }; | |
| 4668 | |
| 4669 | |
| 4670 class CPU_State { | |
| 4671 public: | |
| 4672 FPU_State _fpu_state; | |
| 4673 IU_State _iu_state; | |
| 4674 | |
| 4675 void print() const { | |
| 4676 printf("--------------------------------------------------\n"); | |
| 4677 _iu_state .print(); | |
| 4678 printf("\n"); | |
| 4679 _fpu_state.print(); | |
| 4680 printf("--------------------------------------------------\n"); | |
| 4681 } | |
| 4682 | |
| 4683 }; | |
| 4684 | |
| 4685 | |
| 4686 static void _print_CPU_state(CPU_State* state) { | |
| 4687 state->print(); | |
| 4688 }; | |
| 4689 | |
| 4690 | |
| 4691 void MacroAssembler::print_CPU_state() { | |
| 4692 push_CPU_state(); | |
| 4693 push(rsp); // pass CPU state | |
| 4694 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state))); | |
| 4695 addptr(rsp, wordSize); // discard argument | |
| 4696 pop_CPU_state(); | |
| 4697 } | |
| 4698 | |
| 4699 | |
| 4700 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) { | |
| 4701 static int counter = 0; | |
| 4702 FPU_State* fs = &state->_fpu_state; | |
| 4703 counter++; | |
| 4704 // For leaf calls, only verify that the top few elements remain empty. | |
| 4705 // We only need 1 empty at the top for C2 code. | |
| 4706 if( stack_depth < 0 ) { | |
| 4707 if( fs->tag_for_st(7) != 3 ) { | |
| 4708 printf("FPR7 not empty\n"); | |
| 4709 state->print(); | |
| 4710 assert(false, "error"); | |
| 4711 return false; | |
| 4712 } | |
| 4713 return true; // All other stack states do not matter | |
| 4714 } | |
| 4715 | |
| 4716 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std, | |
| 4717 "bad FPU control word"); | |
| 4718 | |
| 4719 // compute stack depth | |
| 4720 int i = 0; | |
| 4721 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++; | |
| 4722 int d = i; | |
| 4723 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++; | |
| 4724 // verify findings | |
| 4725 if (i != FPU_State::number_of_registers) { | |
| 4726 // stack not contiguous | |
| 4727 printf("%s: stack not contiguous at ST%d\n", s, i); | |
| 4728 state->print(); | |
| 4729 assert(false, "error"); | |
| 4730 return false; | |
| 4731 } | |
| 4732 // check if computed stack depth corresponds to expected stack depth | |
| 4733 if (stack_depth < 0) { | |
| 4734 // expected stack depth is -stack_depth or less | |
| 4735 if (d > -stack_depth) { | |
| 4736 // too many elements on the stack | |
| 4737 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d); | |
| 4738 state->print(); | |
| 4739 assert(false, "error"); | |
| 4740 return false; | |
| 4741 } | |
| 4742 } else { | |
| 4743 // expected stack depth is stack_depth | |
| 4744 if (d != stack_depth) { | |
| 4745 // wrong stack depth | |
| 4746 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d); | |
| 4747 state->print(); | |
| 4748 assert(false, "error"); | |
| 4749 return false; | |
| 4750 } | |
| 4751 } | |
| 4752 // everything is cool | |
| 4753 return true; | |
| 4754 } | |
| 4755 | |
| 4756 | |
| 4757 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { | |
| 4758 if (!VerifyFPU) return; | |
| 4759 push_CPU_state(); | |
| 4760 push(rsp); // pass CPU state | |
| 4761 ExternalAddress msg((address) s); | |
| 4762 // pass message string s | |
| 4763 pushptr(msg.addr()); | |
| 4764 push(stack_depth); // pass stack depth | |
| 4765 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU))); | |
| 4766 addptr(rsp, 3 * wordSize); // discard arguments | |
| 4767 // check for error | |
| 4768 { Label L; | |
| 4769 testl(rax, rax); | |
| 4770 jcc(Assembler::notZero, L); | |
| 4771 int3(); // break if error condition | |
| 4772 bind(L); | |
| 4773 } | |
| 4774 pop_CPU_state(); | |
| 4775 } | |
| 4776 | |
|
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4777 void MacroAssembler::restore_cpu_control_state_after_jni() { |
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4778 // Either restore the MXCSR register after returning from the JNI Call |
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4779 // or verify that it wasn't changed (with -Xcheck:jni flag). |
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4780 if (VM_Version::supports_sse()) { |
|
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4781 if (RestoreMXCSROnJNICalls) { |
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4782 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); |
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4783 } else if (CheckJNICalls) { |
|
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4784 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); |
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4785 } |
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|
4786 } |
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4787 if (VM_Version::supports_avx()) { |
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4788 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty. |
|
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|
4789 vzeroupper(); |
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|
4790 } |
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4791 |
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4792 #ifndef _LP64 |
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4793 // Either restore the x87 floating pointer control word after returning |
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4794 // from the JNI call or verify that it wasn't changed. |
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4795 if (CheckJNICalls) { |
|
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4796 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); |
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4797 } |
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4798 #endif // _LP64 |
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4799 } |
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4800 |
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|
4801 |
| 7199 | 4802 void MacroAssembler::load_klass(Register dst, Register src) { |
| 4803 #ifdef _LP64 | |
| 4804 if (UseCompressedKlassPointers) { | |
| 4805 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); | |
| 4806 decode_klass_not_null(dst); | |
| 4807 } else | |
| 4808 #endif | |
| 4809 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); | |
| 4810 } | |
| 4811 | |
| 4812 void MacroAssembler::load_prototype_header(Register dst, Register src) { | |
| 4813 #ifdef _LP64 | |
| 4814 if (UseCompressedKlassPointers) { | |
| 4815 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 4816 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); | |
| 4817 if (Universe::narrow_klass_shift() != 0) { | |
| 4818 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 4819 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?"); | |
| 4820 movq(dst, Address(r12_heapbase, dst, Address::times_8, Klass::prototype_header_offset())); | |
| 4821 } else { | |
| 4822 movq(dst, Address(dst, Klass::prototype_header_offset())); | |
| 4823 } | |
| 4824 } else | |
| 4825 #endif | |
| 4826 { | |
| 4827 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); | |
| 4828 movptr(dst, Address(dst, Klass::prototype_header_offset())); | |
| 4829 } | |
| 4830 } | |
| 4831 | |
| 4832 void MacroAssembler::store_klass(Register dst, Register src) { | |
| 4833 #ifdef _LP64 | |
| 4834 if (UseCompressedKlassPointers) { | |
| 4835 encode_klass_not_null(src); | |
| 4836 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src); | |
| 4837 } else | |
| 4838 #endif | |
| 4839 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src); | |
| 4840 } | |
| 4841 | |
| 4842 void MacroAssembler::load_heap_oop(Register dst, Address src) { | |
| 4843 #ifdef _LP64 | |
| 4844 // FIXME: Must change all places where we try to load the klass. | |
| 4845 if (UseCompressedOops) { | |
| 4846 movl(dst, src); | |
| 4847 decode_heap_oop(dst); | |
| 4848 } else | |
| 4849 #endif | |
| 4850 movptr(dst, src); | |
| 4851 } | |
| 4852 | |
| 4853 // Doesn't do verfication, generates fixed size code | |
| 4854 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src) { | |
| 4855 #ifdef _LP64 | |
| 4856 if (UseCompressedOops) { | |
| 4857 movl(dst, src); | |
| 4858 decode_heap_oop_not_null(dst); | |
| 4859 } else | |
| 4860 #endif | |
| 4861 movptr(dst, src); | |
| 4862 } | |
| 4863 | |
| 4864 void MacroAssembler::store_heap_oop(Address dst, Register src) { | |
| 4865 #ifdef _LP64 | |
| 4866 if (UseCompressedOops) { | |
| 4867 assert(!dst.uses(src), "not enough registers"); | |
| 4868 encode_heap_oop(src); | |
| 4869 movl(dst, src); | |
| 4870 } else | |
| 4871 #endif | |
| 4872 movptr(dst, src); | |
| 4873 } | |
| 4874 | |
| 4875 void MacroAssembler::cmp_heap_oop(Register src1, Address src2, Register tmp) { | |
| 4876 assert_different_registers(src1, tmp); | |
| 4877 #ifdef _LP64 | |
| 4878 if (UseCompressedOops) { | |
| 4879 bool did_push = false; | |
| 4880 if (tmp == noreg) { | |
| 4881 tmp = rax; | |
| 4882 push(tmp); | |
| 4883 did_push = true; | |
| 4884 assert(!src2.uses(rsp), "can't push"); | |
| 4885 } | |
| 4886 load_heap_oop(tmp, src2); | |
| 4887 cmpptr(src1, tmp); | |
| 4888 if (did_push) pop(tmp); | |
| 4889 } else | |
| 4890 #endif | |
| 4891 cmpptr(src1, src2); | |
| 4892 } | |
| 4893 | |
| 4894 // Used for storing NULLs. | |
| 4895 void MacroAssembler::store_heap_oop_null(Address dst) { | |
| 4896 #ifdef _LP64 | |
| 4897 if (UseCompressedOops) { | |
| 4898 movl(dst, (int32_t)NULL_WORD); | |
| 4899 } else { | |
| 4900 movslq(dst, (int32_t)NULL_WORD); | |
| 4901 } | |
| 4902 #else | |
| 4903 movl(dst, (int32_t)NULL_WORD); | |
| 4904 #endif | |
| 4905 } | |
| 4906 | |
| 4907 #ifdef _LP64 | |
| 4908 void MacroAssembler::store_klass_gap(Register dst, Register src) { | |
| 4909 if (UseCompressedKlassPointers) { | |
| 4910 // Store to klass gap in destination | |
| 4911 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src); | |
| 4912 } | |
| 4913 } | |
| 4914 | |
| 4915 #ifdef ASSERT | |
| 4916 void MacroAssembler::verify_heapbase(const char* msg) { | |
| 4917 assert (UseCompressedOops || UseCompressedKlassPointers, "should be compressed"); | |
| 4918 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 4919 if (CheckCompressedOops) { | |
| 4920 Label ok; | |
| 4921 push(rscratch1); // cmpptr trashes rscratch1 | |
| 4922 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); | |
| 4923 jcc(Assembler::equal, ok); | |
| 4924 STOP(msg); | |
| 4925 bind(ok); | |
| 4926 pop(rscratch1); | |
| 4927 } | |
| 4928 } | |
| 4929 #endif | |
| 4930 | |
| 4931 // Algorithm must match oop.inline.hpp encode_heap_oop. | |
| 4932 void MacroAssembler::encode_heap_oop(Register r) { | |
| 4933 #ifdef ASSERT | |
| 4934 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?"); | |
| 4935 #endif | |
| 4936 verify_oop(r, "broken oop in encode_heap_oop"); | |
| 4937 if (Universe::narrow_oop_base() == NULL) { | |
| 4938 if (Universe::narrow_oop_shift() != 0) { | |
| 4939 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 4940 shrq(r, LogMinObjAlignmentInBytes); | |
| 4941 } | |
| 4942 return; | |
| 4943 } | |
| 4944 testq(r, r); | |
| 4945 cmovq(Assembler::equal, r, r12_heapbase); | |
| 4946 subq(r, r12_heapbase); | |
| 4947 shrq(r, LogMinObjAlignmentInBytes); | |
| 4948 } | |
| 4949 | |
| 4950 void MacroAssembler::encode_heap_oop_not_null(Register r) { | |
| 4951 #ifdef ASSERT | |
| 4952 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?"); | |
| 4953 if (CheckCompressedOops) { | |
| 4954 Label ok; | |
| 4955 testq(r, r); | |
| 4956 jcc(Assembler::notEqual, ok); | |
| 4957 STOP("null oop passed to encode_heap_oop_not_null"); | |
| 4958 bind(ok); | |
| 4959 } | |
| 4960 #endif | |
| 4961 verify_oop(r, "broken oop in encode_heap_oop_not_null"); | |
| 4962 if (Universe::narrow_oop_base() != NULL) { | |
| 4963 subq(r, r12_heapbase); | |
| 4964 } | |
| 4965 if (Universe::narrow_oop_shift() != 0) { | |
| 4966 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 4967 shrq(r, LogMinObjAlignmentInBytes); | |
| 4968 } | |
| 4969 } | |
| 4970 | |
| 4971 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) { | |
| 4972 #ifdef ASSERT | |
| 4973 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?"); | |
| 4974 if (CheckCompressedOops) { | |
| 4975 Label ok; | |
| 4976 testq(src, src); | |
| 4977 jcc(Assembler::notEqual, ok); | |
| 4978 STOP("null oop passed to encode_heap_oop_not_null2"); | |
| 4979 bind(ok); | |
| 4980 } | |
| 4981 #endif | |
| 4982 verify_oop(src, "broken oop in encode_heap_oop_not_null2"); | |
| 4983 if (dst != src) { | |
| 4984 movq(dst, src); | |
| 4985 } | |
| 4986 if (Universe::narrow_oop_base() != NULL) { | |
| 4987 subq(dst, r12_heapbase); | |
| 4988 } | |
| 4989 if (Universe::narrow_oop_shift() != 0) { | |
| 4990 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 4991 shrq(dst, LogMinObjAlignmentInBytes); | |
| 4992 } | |
| 4993 } | |
| 4994 | |
| 4995 void MacroAssembler::decode_heap_oop(Register r) { | |
| 4996 #ifdef ASSERT | |
| 4997 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?"); | |
| 4998 #endif | |
| 4999 if (Universe::narrow_oop_base() == NULL) { | |
| 5000 if (Universe::narrow_oop_shift() != 0) { | |
| 5001 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5002 shlq(r, LogMinObjAlignmentInBytes); | |
| 5003 } | |
| 5004 } else { | |
| 5005 Label done; | |
| 5006 shlq(r, LogMinObjAlignmentInBytes); | |
| 5007 jccb(Assembler::equal, done); | |
| 5008 addq(r, r12_heapbase); | |
| 5009 bind(done); | |
| 5010 } | |
| 5011 verify_oop(r, "broken oop in decode_heap_oop"); | |
| 5012 } | |
| 5013 | |
| 5014 void MacroAssembler::decode_heap_oop_not_null(Register r) { | |
| 5015 // Note: it will change flags | |
| 5016 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5017 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5018 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
| 5019 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5020 // Also do not verify_oop as this is called by verify_oop. | |
| 5021 if (Universe::narrow_oop_shift() != 0) { | |
| 5022 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5023 shlq(r, LogMinObjAlignmentInBytes); | |
| 5024 if (Universe::narrow_oop_base() != NULL) { | |
| 5025 addq(r, r12_heapbase); | |
| 5026 } | |
| 5027 } else { | |
| 5028 assert (Universe::narrow_oop_base() == NULL, "sanity"); | |
| 5029 } | |
| 5030 } | |
| 5031 | |
| 5032 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) { | |
| 5033 // Note: it will change flags | |
| 5034 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5035 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5036 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
| 5037 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5038 // Also do not verify_oop as this is called by verify_oop. | |
| 5039 if (Universe::narrow_oop_shift() != 0) { | |
| 5040 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
| 5041 if (LogMinObjAlignmentInBytes == Address::times_8) { | |
| 5042 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); | |
| 5043 } else { | |
| 5044 if (dst != src) { | |
| 5045 movq(dst, src); | |
| 5046 } | |
| 5047 shlq(dst, LogMinObjAlignmentInBytes); | |
| 5048 if (Universe::narrow_oop_base() != NULL) { | |
| 5049 addq(dst, r12_heapbase); | |
| 5050 } | |
| 5051 } | |
| 5052 } else { | |
| 5053 assert (Universe::narrow_oop_base() == NULL, "sanity"); | |
| 5054 if (dst != src) { | |
| 5055 movq(dst, src); | |
| 5056 } | |
| 5057 } | |
| 5058 } | |
| 5059 | |
| 5060 void MacroAssembler::encode_klass_not_null(Register r) { | |
| 5061 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
| 5062 #ifdef ASSERT | |
| 5063 verify_heapbase("MacroAssembler::encode_klass_not_null: heap base corrupted?"); | |
| 5064 #endif | |
| 5065 if (Universe::narrow_klass_base() != NULL) { | |
| 5066 subq(r, r12_heapbase); | |
| 5067 } | |
| 5068 if (Universe::narrow_klass_shift() != 0) { | |
| 5069 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 5070 shrq(r, LogKlassAlignmentInBytes); | |
| 5071 } | |
| 5072 } | |
| 5073 | |
| 5074 void MacroAssembler::encode_klass_not_null(Register dst, Register src) { | |
| 5075 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
| 5076 #ifdef ASSERT | |
| 5077 verify_heapbase("MacroAssembler::encode_klass_not_null2: heap base corrupted?"); | |
| 5078 #endif | |
| 5079 if (dst != src) { | |
| 5080 movq(dst, src); | |
| 5081 } | |
| 5082 if (Universe::narrow_klass_base() != NULL) { | |
| 5083 subq(dst, r12_heapbase); | |
| 5084 } | |
| 5085 if (Universe::narrow_klass_shift() != 0) { | |
| 5086 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 5087 shrq(dst, LogKlassAlignmentInBytes); | |
| 5088 } | |
| 5089 } | |
| 5090 | |
| 5091 void MacroAssembler::decode_klass_not_null(Register r) { | |
| 5092 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
| 5093 // Note: it will change flags | |
| 5094 assert (UseCompressedKlassPointers, "should only be used for compressed headers"); | |
| 5095 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
| 5096 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5097 // Also do not verify_oop as this is called by verify_oop. | |
| 5098 if (Universe::narrow_klass_shift() != 0) { | |
| 5099 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 5100 shlq(r, LogKlassAlignmentInBytes); | |
| 5101 if (Universe::narrow_klass_base() != NULL) { | |
| 5102 addq(r, r12_heapbase); | |
| 5103 } | |
| 5104 } else { | |
| 5105 assert (Universe::narrow_klass_base() == NULL, "sanity"); | |
| 5106 } | |
| 5107 } | |
| 5108 | |
| 5109 void MacroAssembler::decode_klass_not_null(Register dst, Register src) { | |
| 5110 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
| 5111 // Note: it will change flags | |
| 5112 assert (UseCompressedKlassPointers, "should only be used for compressed headers"); | |
| 5113 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
| 5114 // vtableStubs also counts instructions in pd_code_size_limit. | |
| 5115 // Also do not verify_oop as this is called by verify_oop. | |
| 5116 if (Universe::narrow_klass_shift() != 0) { | |
| 5117 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
| 5118 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?"); | |
| 5119 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); | |
| 5120 } else { | |
| 5121 assert (Universe::narrow_klass_base() == NULL, "sanity"); | |
| 5122 if (dst != src) { | |
| 5123 movq(dst, src); | |
| 5124 } | |
| 5125 } | |
| 5126 } | |
| 5127 | |
| 5128 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) { | |
| 5129 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5130 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5131 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5132 int oop_index = oop_recorder()->find_index(obj); | |
| 5133 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 5134 mov_narrow_oop(dst, oop_index, rspec); | |
| 5135 } | |
| 5136 | |
| 5137 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) { | |
| 5138 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5139 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5140 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5141 int oop_index = oop_recorder()->find_index(obj); | |
| 5142 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 5143 mov_narrow_oop(dst, oop_index, rspec); | |
| 5144 } | |
| 5145 | |
| 5146 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) { | |
| 5147 assert (UseCompressedKlassPointers, "should only be used for compressed headers"); | |
| 5148 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5149 int klass_index = oop_recorder()->find_index(k); | |
| 5150 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
| 5151 mov_narrow_oop(dst, oopDesc::encode_klass(k), rspec); | |
| 5152 } | |
| 5153 | |
| 5154 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) { | |
| 5155 assert (UseCompressedKlassPointers, "should only be used for compressed headers"); | |
| 5156 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5157 int klass_index = oop_recorder()->find_index(k); | |
| 5158 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
| 5159 mov_narrow_oop(dst, oopDesc::encode_klass(k), rspec); | |
| 5160 } | |
| 5161 | |
| 5162 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) { | |
| 5163 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5164 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5165 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5166 int oop_index = oop_recorder()->find_index(obj); | |
| 5167 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 5168 Assembler::cmp_narrow_oop(dst, oop_index, rspec); | |
| 5169 } | |
| 5170 | |
| 5171 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) { | |
| 5172 assert (UseCompressedOops, "should only be used for compressed headers"); | |
| 5173 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
| 5174 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5175 int oop_index = oop_recorder()->find_index(obj); | |
| 5176 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
| 5177 Assembler::cmp_narrow_oop(dst, oop_index, rspec); | |
| 5178 } | |
| 5179 | |
| 5180 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) { | |
| 5181 assert (UseCompressedKlassPointers, "should only be used for compressed headers"); | |
| 5182 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5183 int klass_index = oop_recorder()->find_index(k); | |
| 5184 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
| 5185 Assembler::cmp_narrow_oop(dst, oopDesc::encode_klass(k), rspec); | |
| 5186 } | |
| 5187 | |
| 5188 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) { | |
| 5189 assert (UseCompressedKlassPointers, "should only be used for compressed headers"); | |
| 5190 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
| 5191 int klass_index = oop_recorder()->find_index(k); | |
| 5192 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
| 5193 Assembler::cmp_narrow_oop(dst, oopDesc::encode_klass(k), rspec); | |
| 5194 } | |
| 5195 | |
| 5196 void MacroAssembler::reinit_heapbase() { | |
| 5197 if (UseCompressedOops || UseCompressedKlassPointers) { | |
| 5198 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); | |
| 5199 } | |
| 5200 } | |
| 5201 #endif // _LP64 | |
| 5202 | |
| 5203 | |
| 5204 // C2 compiled method's prolog code. | |
| 5205 void MacroAssembler::verified_entry(int framesize, bool stack_bang, bool fp_mode_24b) { | |
| 5206 | |
| 5207 // WARNING: Initial instruction MUST be 5 bytes or longer so that | |
| 5208 // NativeJump::patch_verified_entry will be able to patch out the entry | |
| 5209 // code safely. The push to verify stack depth is ok at 5 bytes, | |
| 5210 // the frame allocation can be either 3 or 6 bytes. So if we don't do | |
| 5211 // stack bang then we must use the 6 byte frame allocation even if | |
| 5212 // we have no frame. :-( | |
| 5213 | |
| 5214 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned"); | |
| 5215 // Remove word for return addr | |
| 5216 framesize -= wordSize; | |
| 5217 | |
| 5218 // Calls to C2R adapters often do not accept exceptional returns. | |
| 5219 // We require that their callers must bang for them. But be careful, because | |
| 5220 // some VM calls (such as call site linkage) can use several kilobytes of | |
| 5221 // stack. But the stack safety zone should account for that. | |
| 5222 // See bugs 4446381, 4468289, 4497237. | |
| 5223 if (stack_bang) { | |
| 5224 generate_stack_overflow_check(framesize); | |
| 5225 | |
| 5226 // We always push rbp, so that on return to interpreter rbp, will be | |
| 5227 // restored correctly and we can correct the stack. | |
| 5228 push(rbp); | |
| 5229 // Remove word for ebp | |
| 5230 framesize -= wordSize; | |
| 5231 | |
| 5232 // Create frame | |
| 5233 if (framesize) { | |
| 5234 subptr(rsp, framesize); | |
| 5235 } | |
| 5236 } else { | |
| 5237 // Create frame (force generation of a 4 byte immediate value) | |
| 5238 subptr_imm32(rsp, framesize); | |
| 5239 | |
| 5240 // Save RBP register now. | |
| 5241 framesize -= wordSize; | |
| 5242 movptr(Address(rsp, framesize), rbp); | |
| 5243 } | |
| 5244 | |
| 5245 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth | |
| 5246 framesize -= wordSize; | |
| 5247 movptr(Address(rsp, framesize), (int32_t)0xbadb100d); | |
| 5248 } | |
| 5249 | |
| 5250 #ifndef _LP64 | |
| 5251 // If method sets FPU control word do it now | |
| 5252 if (fp_mode_24b) { | |
| 5253 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); | |
| 5254 } | |
| 5255 if (UseSSE >= 2 && VerifyFPU) { | |
| 5256 verify_FPU(0, "FPU stack must be clean on entry"); | |
| 5257 } | |
| 5258 #endif | |
| 5259 | |
| 5260 #ifdef ASSERT | |
| 5261 if (VerifyStackAtCalls) { | |
| 5262 Label L; | |
| 5263 push(rax); | |
| 5264 mov(rax, rsp); | |
| 5265 andptr(rax, StackAlignmentInBytes-1); | |
| 5266 cmpptr(rax, StackAlignmentInBytes-wordSize); | |
| 5267 pop(rax); | |
| 5268 jcc(Assembler::equal, L); | |
| 5269 STOP("Stack is not properly aligned!"); | |
| 5270 bind(L); | |
| 5271 } | |
| 5272 #endif | |
| 5273 | |
| 5274 } | |
| 5275 | |
|
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5276 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp) { |
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5277 // cnt - number of qwords (8-byte words). |
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5278 // base - start address, qword aligned. |
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5279 assert(base==rdi, "base register must be edi for rep stos"); |
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5280 assert(tmp==rax, "tmp register must be eax for rep stos"); |
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5281 assert(cnt==rcx, "cnt register must be ecx for rep stos"); |
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5282 |
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5283 xorptr(tmp, tmp); |
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5284 if (UseFastStosb) { |
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5285 shlptr(cnt,3); // convert to number of bytes |
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5286 rep_stosb(); |
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5287 } else { |
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5288 NOT_LP64(shlptr(cnt,1);) // convert to number of dwords for 32-bit VM |
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5289 rep_stos(); |
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5290 } |
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5291 } |
| 7199 | 5292 |
| 5293 // IndexOf for constant substrings with size >= 8 chars | |
| 5294 // which don't need to be loaded through stack. | |
| 5295 void MacroAssembler::string_indexofC8(Register str1, Register str2, | |
| 5296 Register cnt1, Register cnt2, | |
| 5297 int int_cnt2, Register result, | |
| 5298 XMMRegister vec, Register tmp) { | |
| 5299 ShortBranchVerifier sbv(this); | |
| 5300 assert(UseSSE42Intrinsics, "SSE4.2 is required"); | |
| 5301 | |
| 5302 // This method uses pcmpestri inxtruction with bound registers | |
| 5303 // inputs: | |
| 5304 // xmm - substring | |
| 5305 // rax - substring length (elements count) | |
| 5306 // mem - scanned string | |
| 5307 // rdx - string length (elements count) | |
| 5308 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) | |
| 5309 // outputs: | |
| 5310 // rcx - matched index in string | |
| 5311 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
| 5312 | |
| 5313 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, | |
| 5314 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR, | |
| 5315 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE; | |
| 5316 | |
| 5317 // Note, inline_string_indexOf() generates checks: | |
| 5318 // if (substr.count > string.count) return -1; | |
| 5319 // if (substr.count == 0) return 0; | |
| 5320 assert(int_cnt2 >= 8, "this code isused only for cnt2 >= 8 chars"); | |
| 5321 | |
| 5322 // Load substring. | |
| 5323 movdqu(vec, Address(str2, 0)); | |
| 5324 movl(cnt2, int_cnt2); | |
| 5325 movptr(result, str1); // string addr | |
| 5326 | |
| 5327 if (int_cnt2 > 8) { | |
| 5328 jmpb(SCAN_TO_SUBSTR); | |
| 5329 | |
| 5330 // Reload substr for rescan, this code | |
| 5331 // is executed only for large substrings (> 8 chars) | |
| 5332 bind(RELOAD_SUBSTR); | |
| 5333 movdqu(vec, Address(str2, 0)); | |
| 5334 negptr(cnt2); // Jumped here with negative cnt2, convert to positive | |
| 5335 | |
| 5336 bind(RELOAD_STR); | |
| 5337 // We came here after the beginning of the substring was | |
| 5338 // matched but the rest of it was not so we need to search | |
| 5339 // again. Start from the next element after the previous match. | |
| 5340 | |
| 5341 // cnt2 is number of substring reminding elements and | |
| 5342 // cnt1 is number of string reminding elements when cmp failed. | |
| 5343 // Restored cnt1 = cnt1 - cnt2 + int_cnt2 | |
| 5344 subl(cnt1, cnt2); | |
| 5345 addl(cnt1, int_cnt2); | |
| 5346 movl(cnt2, int_cnt2); // Now restore cnt2 | |
| 5347 | |
| 5348 decrementl(cnt1); // Shift to next element | |
| 5349 cmpl(cnt1, cnt2); | |
| 5350 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 5351 | |
| 5352 addptr(result, 2); | |
| 5353 | |
| 5354 } // (int_cnt2 > 8) | |
| 5355 | |
| 5356 // Scan string for start of substr in 16-byte vectors | |
| 5357 bind(SCAN_TO_SUBSTR); | |
| 5358 pcmpestri(vec, Address(result, 0), 0x0d); | |
| 5359 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 | |
| 5360 subl(cnt1, 8); | |
| 5361 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string | |
| 5362 cmpl(cnt1, cnt2); | |
| 5363 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 5364 addptr(result, 16); | |
| 5365 jmpb(SCAN_TO_SUBSTR); | |
| 5366 | |
| 5367 // Found a potential substr | |
| 5368 bind(FOUND_CANDIDATE); | |
| 5369 // Matched whole vector if first element matched (tmp(rcx) == 0). | |
| 5370 if (int_cnt2 == 8) { | |
| 5371 jccb(Assembler::overflow, RET_FOUND); // OF == 1 | |
| 5372 } else { // int_cnt2 > 8 | |
| 5373 jccb(Assembler::overflow, FOUND_SUBSTR); | |
| 5374 } | |
| 5375 // After pcmpestri tmp(rcx) contains matched element index | |
| 5376 // Compute start addr of substr | |
| 5377 lea(result, Address(result, tmp, Address::times_2)); | |
| 5378 | |
| 5379 // Make sure string is still long enough | |
| 5380 subl(cnt1, tmp); | |
| 5381 cmpl(cnt1, cnt2); | |
| 5382 if (int_cnt2 == 8) { | |
| 5383 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); | |
| 5384 } else { // int_cnt2 > 8 | |
| 5385 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD); | |
| 5386 } | |
| 5387 // Left less then substring. | |
| 5388 | |
| 5389 bind(RET_NOT_FOUND); | |
| 5390 movl(result, -1); | |
| 5391 jmpb(EXIT); | |
| 5392 | |
| 5393 if (int_cnt2 > 8) { | |
| 5394 // This code is optimized for the case when whole substring | |
| 5395 // is matched if its head is matched. | |
| 5396 bind(MATCH_SUBSTR_HEAD); | |
| 5397 pcmpestri(vec, Address(result, 0), 0x0d); | |
| 5398 // Reload only string if does not match | |
| 5399 jccb(Assembler::noOverflow, RELOAD_STR); // OF == 0 | |
| 5400 | |
| 5401 Label CONT_SCAN_SUBSTR; | |
| 5402 // Compare the rest of substring (> 8 chars). | |
| 5403 bind(FOUND_SUBSTR); | |
| 5404 // First 8 chars are already matched. | |
| 5405 negptr(cnt2); | |
| 5406 addptr(cnt2, 8); | |
| 5407 | |
| 5408 bind(SCAN_SUBSTR); | |
| 5409 subl(cnt1, 8); | |
| 5410 cmpl(cnt2, -8); // Do not read beyond substring | |
| 5411 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR); | |
| 5412 // Back-up strings to avoid reading beyond substring: | |
| 5413 // cnt1 = cnt1 - cnt2 + 8 | |
| 5414 addl(cnt1, cnt2); // cnt2 is negative | |
| 5415 addl(cnt1, 8); | |
| 5416 movl(cnt2, 8); negptr(cnt2); | |
| 5417 bind(CONT_SCAN_SUBSTR); | |
| 5418 if (int_cnt2 < (int)G) { | |
| 5419 movdqu(vec, Address(str2, cnt2, Address::times_2, int_cnt2*2)); | |
| 5420 pcmpestri(vec, Address(result, cnt2, Address::times_2, int_cnt2*2), 0x0d); | |
| 5421 } else { | |
| 5422 // calculate index in register to avoid integer overflow (int_cnt2*2) | |
| 5423 movl(tmp, int_cnt2); | |
| 5424 addptr(tmp, cnt2); | |
| 5425 movdqu(vec, Address(str2, tmp, Address::times_2, 0)); | |
| 5426 pcmpestri(vec, Address(result, tmp, Address::times_2, 0), 0x0d); | |
| 5427 } | |
| 5428 // Need to reload strings pointers if not matched whole vector | |
| 5429 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 | |
| 5430 addptr(cnt2, 8); | |
| 5431 jcc(Assembler::negative, SCAN_SUBSTR); | |
| 5432 // Fall through if found full substring | |
| 5433 | |
| 5434 } // (int_cnt2 > 8) | |
| 5435 | |
| 5436 bind(RET_FOUND); | |
| 5437 // Found result if we matched full small substring. | |
| 5438 // Compute substr offset | |
| 5439 subptr(result, str1); | |
| 5440 shrl(result, 1); // index | |
| 5441 bind(EXIT); | |
| 5442 | |
| 5443 } // string_indexofC8 | |
| 5444 | |
| 5445 // Small strings are loaded through stack if they cross page boundary. | |
| 5446 void MacroAssembler::string_indexof(Register str1, Register str2, | |
| 5447 Register cnt1, Register cnt2, | |
| 5448 int int_cnt2, Register result, | |
| 5449 XMMRegister vec, Register tmp) { | |
| 5450 ShortBranchVerifier sbv(this); | |
| 5451 assert(UseSSE42Intrinsics, "SSE4.2 is required"); | |
| 5452 // | |
| 5453 // int_cnt2 is length of small (< 8 chars) constant substring | |
| 5454 // or (-1) for non constant substring in which case its length | |
| 5455 // is in cnt2 register. | |
| 5456 // | |
| 5457 // Note, inline_string_indexOf() generates checks: | |
| 5458 // if (substr.count > string.count) return -1; | |
| 5459 // if (substr.count == 0) return 0; | |
| 5460 // | |
| 5461 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < 8), "should be != 0"); | |
| 5462 | |
| 5463 // This method uses pcmpestri inxtruction with bound registers | |
| 5464 // inputs: | |
| 5465 // xmm - substring | |
| 5466 // rax - substring length (elements count) | |
| 5467 // mem - scanned string | |
| 5468 // rdx - string length (elements count) | |
| 5469 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) | |
| 5470 // outputs: | |
| 5471 // rcx - matched index in string | |
| 5472 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
| 5473 | |
| 5474 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR, | |
| 5475 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR, | |
| 5476 FOUND_CANDIDATE; | |
| 5477 | |
| 5478 { //======================================================== | |
| 5479 // We don't know where these strings are located | |
| 5480 // and we can't read beyond them. Load them through stack. | |
| 5481 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR; | |
| 5482 | |
| 5483 movptr(tmp, rsp); // save old SP | |
| 5484 | |
| 5485 if (int_cnt2 > 0) { // small (< 8 chars) constant substring | |
| 5486 if (int_cnt2 == 1) { // One char | |
| 5487 load_unsigned_short(result, Address(str2, 0)); | |
| 5488 movdl(vec, result); // move 32 bits | |
| 5489 } else if (int_cnt2 == 2) { // Two chars | |
| 5490 movdl(vec, Address(str2, 0)); // move 32 bits | |
| 5491 } else if (int_cnt2 == 4) { // Four chars | |
| 5492 movq(vec, Address(str2, 0)); // move 64 bits | |
| 5493 } else { // cnt2 = { 3, 5, 6, 7 } | |
| 5494 // Array header size is 12 bytes in 32-bit VM | |
| 5495 // + 6 bytes for 3 chars == 18 bytes, | |
| 5496 // enough space to load vec and shift. | |
| 5497 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity"); | |
| 5498 movdqu(vec, Address(str2, (int_cnt2*2)-16)); | |
| 5499 psrldq(vec, 16-(int_cnt2*2)); | |
| 5500 } | |
| 5501 } else { // not constant substring | |
| 5502 cmpl(cnt2, 8); | |
| 5503 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough | |
| 5504 | |
| 5505 // We can read beyond string if srt+16 does not cross page boundary | |
| 5506 // since heaps are aligned and mapped by pages. | |
| 5507 assert(os::vm_page_size() < (int)G, "default page should be small"); | |
| 5508 movl(result, str2); // We need only low 32 bits | |
| 5509 andl(result, (os::vm_page_size()-1)); | |
| 5510 cmpl(result, (os::vm_page_size()-16)); | |
| 5511 jccb(Assembler::belowEqual, CHECK_STR); | |
| 5512 | |
| 5513 // Move small strings to stack to allow load 16 bytes into vec. | |
| 5514 subptr(rsp, 16); | |
| 5515 int stk_offset = wordSize-2; | |
| 5516 push(cnt2); | |
| 5517 | |
| 5518 bind(COPY_SUBSTR); | |
| 5519 load_unsigned_short(result, Address(str2, cnt2, Address::times_2, -2)); | |
| 5520 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result); | |
| 5521 decrement(cnt2); | |
| 5522 jccb(Assembler::notZero, COPY_SUBSTR); | |
| 5523 | |
| 5524 pop(cnt2); | |
| 5525 movptr(str2, rsp); // New substring address | |
| 5526 } // non constant | |
| 5527 | |
| 5528 bind(CHECK_STR); | |
| 5529 cmpl(cnt1, 8); | |
| 5530 jccb(Assembler::aboveEqual, BIG_STRINGS); | |
| 5531 | |
| 5532 // Check cross page boundary. | |
| 5533 movl(result, str1); // We need only low 32 bits | |
| 5534 andl(result, (os::vm_page_size()-1)); | |
| 5535 cmpl(result, (os::vm_page_size()-16)); | |
| 5536 jccb(Assembler::belowEqual, BIG_STRINGS); | |
| 5537 | |
| 5538 subptr(rsp, 16); | |
| 5539 int stk_offset = -2; | |
| 5540 if (int_cnt2 < 0) { // not constant | |
| 5541 push(cnt2); | |
| 5542 stk_offset += wordSize; | |
| 5543 } | |
| 5544 movl(cnt2, cnt1); | |
| 5545 | |
| 5546 bind(COPY_STR); | |
| 5547 load_unsigned_short(result, Address(str1, cnt2, Address::times_2, -2)); | |
| 5548 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result); | |
| 5549 decrement(cnt2); | |
| 5550 jccb(Assembler::notZero, COPY_STR); | |
| 5551 | |
| 5552 if (int_cnt2 < 0) { // not constant | |
| 5553 pop(cnt2); | |
| 5554 } | |
| 5555 movptr(str1, rsp); // New string address | |
| 5556 | |
| 5557 bind(BIG_STRINGS); | |
| 5558 // Load substring. | |
| 5559 if (int_cnt2 < 0) { // -1 | |
| 5560 movdqu(vec, Address(str2, 0)); | |
| 5561 push(cnt2); // substr count | |
| 5562 push(str2); // substr addr | |
| 5563 push(str1); // string addr | |
| 5564 } else { | |
| 5565 // Small (< 8 chars) constant substrings are loaded already. | |
| 5566 movl(cnt2, int_cnt2); | |
| 5567 } | |
| 5568 push(tmp); // original SP | |
| 5569 | |
| 5570 } // Finished loading | |
| 5571 | |
| 5572 //======================================================== | |
| 5573 // Start search | |
| 5574 // | |
| 5575 | |
| 5576 movptr(result, str1); // string addr | |
| 5577 | |
| 5578 if (int_cnt2 < 0) { // Only for non constant substring | |
| 5579 jmpb(SCAN_TO_SUBSTR); | |
| 5580 | |
| 5581 // SP saved at sp+0 | |
| 5582 // String saved at sp+1*wordSize | |
| 5583 // Substr saved at sp+2*wordSize | |
| 5584 // Substr count saved at sp+3*wordSize | |
| 5585 | |
| 5586 // Reload substr for rescan, this code | |
| 5587 // is executed only for large substrings (> 8 chars) | |
| 5588 bind(RELOAD_SUBSTR); | |
| 5589 movptr(str2, Address(rsp, 2*wordSize)); | |
| 5590 movl(cnt2, Address(rsp, 3*wordSize)); | |
| 5591 movdqu(vec, Address(str2, 0)); | |
| 5592 // We came here after the beginning of the substring was | |
| 5593 // matched but the rest of it was not so we need to search | |
| 5594 // again. Start from the next element after the previous match. | |
| 5595 subptr(str1, result); // Restore counter | |
| 5596 shrl(str1, 1); | |
| 5597 addl(cnt1, str1); | |
| 5598 decrementl(cnt1); // Shift to next element | |
| 5599 cmpl(cnt1, cnt2); | |
| 5600 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 5601 | |
| 5602 addptr(result, 2); | |
| 5603 } // non constant | |
| 5604 | |
| 5605 // Scan string for start of substr in 16-byte vectors | |
| 5606 bind(SCAN_TO_SUBSTR); | |
| 5607 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
| 5608 pcmpestri(vec, Address(result, 0), 0x0d); | |
| 5609 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 | |
| 5610 subl(cnt1, 8); | |
| 5611 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string | |
| 5612 cmpl(cnt1, cnt2); | |
| 5613 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
| 5614 addptr(result, 16); | |
| 5615 | |
| 5616 bind(ADJUST_STR); | |
| 5617 cmpl(cnt1, 8); // Do not read beyond string | |
| 5618 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); | |
| 5619 // Back-up string to avoid reading beyond string. | |
| 5620 lea(result, Address(result, cnt1, Address::times_2, -16)); | |
| 5621 movl(cnt1, 8); | |
| 5622 jmpb(SCAN_TO_SUBSTR); | |
| 5623 | |
| 5624 // Found a potential substr | |
| 5625 bind(FOUND_CANDIDATE); | |
| 5626 // After pcmpestri tmp(rcx) contains matched element index | |
| 5627 | |
| 5628 // Make sure string is still long enough | |
| 5629 subl(cnt1, tmp); | |
| 5630 cmpl(cnt1, cnt2); | |
| 5631 jccb(Assembler::greaterEqual, FOUND_SUBSTR); | |
| 5632 // Left less then substring. | |
| 5633 | |
| 5634 bind(RET_NOT_FOUND); | |
| 5635 movl(result, -1); | |
| 5636 jmpb(CLEANUP); | |
| 5637 | |
| 5638 bind(FOUND_SUBSTR); | |
| 5639 // Compute start addr of substr | |
| 5640 lea(result, Address(result, tmp, Address::times_2)); | |
| 5641 | |
| 5642 if (int_cnt2 > 0) { // Constant substring | |
| 5643 // Repeat search for small substring (< 8 chars) | |
| 5644 // from new point without reloading substring. | |
| 5645 // Have to check that we don't read beyond string. | |
| 5646 cmpl(tmp, 8-int_cnt2); | |
| 5647 jccb(Assembler::greater, ADJUST_STR); | |
| 5648 // Fall through if matched whole substring. | |
| 5649 } else { // non constant | |
| 5650 assert(int_cnt2 == -1, "should be != 0"); | |
| 5651 | |
| 5652 addl(tmp, cnt2); | |
| 5653 // Found result if we matched whole substring. | |
| 5654 cmpl(tmp, 8); | |
| 5655 jccb(Assembler::lessEqual, RET_FOUND); | |
| 5656 | |
| 5657 // Repeat search for small substring (<= 8 chars) | |
| 5658 // from new point 'str1' without reloading substring. | |
| 5659 cmpl(cnt2, 8); | |
| 5660 // Have to check that we don't read beyond string. | |
| 5661 jccb(Assembler::lessEqual, ADJUST_STR); | |
| 5662 | |
| 5663 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG; | |
| 5664 // Compare the rest of substring (> 8 chars). | |
| 5665 movptr(str1, result); | |
| 5666 | |
| 5667 cmpl(tmp, cnt2); | |
| 5668 // First 8 chars are already matched. | |
| 5669 jccb(Assembler::equal, CHECK_NEXT); | |
| 5670 | |
| 5671 bind(SCAN_SUBSTR); | |
| 5672 pcmpestri(vec, Address(str1, 0), 0x0d); | |
| 5673 // Need to reload strings pointers if not matched whole vector | |
| 5674 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 | |
| 5675 | |
| 5676 bind(CHECK_NEXT); | |
| 5677 subl(cnt2, 8); | |
| 5678 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring | |
| 5679 addptr(str1, 16); | |
| 5680 addptr(str2, 16); | |
| 5681 subl(cnt1, 8); | |
| 5682 cmpl(cnt2, 8); // Do not read beyond substring | |
| 5683 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR); | |
| 5684 // Back-up strings to avoid reading beyond substring. | |
| 5685 lea(str2, Address(str2, cnt2, Address::times_2, -16)); | |
| 5686 lea(str1, Address(str1, cnt2, Address::times_2, -16)); | |
| 5687 subl(cnt1, cnt2); | |
| 5688 movl(cnt2, 8); | |
| 5689 addl(cnt1, 8); | |
| 5690 bind(CONT_SCAN_SUBSTR); | |
| 5691 movdqu(vec, Address(str2, 0)); | |
| 5692 jmpb(SCAN_SUBSTR); | |
| 5693 | |
| 5694 bind(RET_FOUND_LONG); | |
| 5695 movptr(str1, Address(rsp, wordSize)); | |
| 5696 } // non constant | |
| 5697 | |
| 5698 bind(RET_FOUND); | |
| 5699 // Compute substr offset | |
| 5700 subptr(result, str1); | |
| 5701 shrl(result, 1); // index | |
| 5702 | |
| 5703 bind(CLEANUP); | |
| 5704 pop(rsp); // restore SP | |
| 5705 | |
| 5706 } // string_indexof | |
| 5707 | |
| 5708 // Compare strings. | |
| 5709 void MacroAssembler::string_compare(Register str1, Register str2, | |
| 5710 Register cnt1, Register cnt2, Register result, | |
| 5711 XMMRegister vec1) { | |
| 5712 ShortBranchVerifier sbv(this); | |
| 5713 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL; | |
| 5714 | |
| 5715 // Compute the minimum of the string lengths and the | |
| 5716 // difference of the string lengths (stack). | |
| 5717 // Do the conditional move stuff | |
| 5718 movl(result, cnt1); | |
| 5719 subl(cnt1, cnt2); | |
| 5720 push(cnt1); | |
| 5721 cmov32(Assembler::lessEqual, cnt2, result); | |
| 5722 | |
| 5723 // Is the minimum length zero? | |
| 5724 testl(cnt2, cnt2); | |
| 5725 jcc(Assembler::zero, LENGTH_DIFF_LABEL); | |
| 5726 | |
|
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|
5727 // Compare first characters |
| 7199 | 5728 load_unsigned_short(result, Address(str1, 0)); |
| 5729 load_unsigned_short(cnt1, Address(str2, 0)); | |
| 5730 subl(result, cnt1); | |
| 5731 jcc(Assembler::notZero, POP_LABEL); | |
|
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|
5732 cmpl(cnt2, 1); |
|
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|
5733 jcc(Assembler::equal, LENGTH_DIFF_LABEL); |
|
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|
5734 |
|
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|
5735 // Check if the strings start at the same location. |
|
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|
5736 cmpptr(str1, str2); |
|
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|
5737 jcc(Assembler::equal, LENGTH_DIFF_LABEL); |
| 7199 | 5738 |
| 5739 Address::ScaleFactor scale = Address::times_2; | |
| 5740 int stride = 8; | |
| 5741 | |
|
8042
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|
5742 if (UseAVX >= 2 && UseSSE42Intrinsics) { |
|
7477
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|
5743 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR; |
|
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|
5744 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR; |
|
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|
5745 Label COMPARE_TAIL_LONG; |
|
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|
5746 int pcmpmask = 0x19; |
|
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|
5747 |
|
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|
5748 // Setup to compare 16-chars (32-bytes) vectors, |
|
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|
5749 // start from first character again because it has aligned address. |
|
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|
5750 int stride2 = 16; |
|
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|
5751 int adr_stride = stride << scale; |
|
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|
5752 int adr_stride2 = stride2 << scale; |
|
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|
5753 |
|
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|
5754 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); |
|
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|
5755 // rax and rdx are used by pcmpestri as elements counters |
|
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|
5756 movl(result, cnt2); |
|
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|
5757 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count |
|
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|
5758 jcc(Assembler::zero, COMPARE_TAIL_LONG); |
|
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|
5759 |
|
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|
5760 // fast path : compare first 2 8-char vectors. |
|
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|
5761 bind(COMPARE_16_CHARS); |
|
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|
5762 movdqu(vec1, Address(str1, 0)); |
|
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|
5763 pcmpestri(vec1, Address(str2, 0), pcmpmask); |
|
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|
5764 jccb(Assembler::below, COMPARE_INDEX_CHAR); |
|
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|
5765 |
|
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|
5766 movdqu(vec1, Address(str1, adr_stride)); |
|
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|
5767 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask); |
|
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|
5768 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS); |
|
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|
5769 addl(cnt1, stride); |
|
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|
5770 |
|
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|
5771 // Compare the characters at index in cnt1 |
|
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|
5772 bind(COMPARE_INDEX_CHAR); //cnt1 has the offset of the mismatching character |
|
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|
5773 load_unsigned_short(result, Address(str1, cnt1, scale)); |
|
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|
5774 load_unsigned_short(cnt2, Address(str2, cnt1, scale)); |
|
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|
5775 subl(result, cnt2); |
|
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|
5776 jmp(POP_LABEL); |
|
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|
5777 |
|
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|
5778 // Setup the registers to start vector comparison loop |
|
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|
5779 bind(COMPARE_WIDE_VECTORS); |
|
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|
5780 lea(str1, Address(str1, result, scale)); |
|
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|
5781 lea(str2, Address(str2, result, scale)); |
|
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|
5782 subl(result, stride2); |
|
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|
5783 subl(cnt2, stride2); |
|
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|
5784 jccb(Assembler::zero, COMPARE_WIDE_TAIL); |
|
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|
5785 negptr(result); |
|
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|
5786 |
|
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|
5787 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest) |
|
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|
5788 bind(COMPARE_WIDE_VECTORS_LOOP); |
|
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|
5789 vmovdqu(vec1, Address(str1, result, scale)); |
|
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|
5790 vpxor(vec1, Address(str2, result, scale)); |
|
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|
5791 vptest(vec1, vec1); |
|
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|
5792 jccb(Assembler::notZero, VECTOR_NOT_EQUAL); |
|
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|
5793 addptr(result, stride2); |
|
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|
5794 subl(cnt2, stride2); |
|
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|
5795 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP); |
|
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|
5796 // clean upper bits of YMM registers |
|
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|
5797 vzeroupper(); |
|
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|
5798 |
|
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|
5799 // compare wide vectors tail |
|
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|
5800 bind(COMPARE_WIDE_TAIL); |
|
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|
5801 testptr(result, result); |
|
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|
5802 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
|
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|
5803 |
|
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|
5804 movl(result, stride2); |
|
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|
5805 movl(cnt2, result); |
|
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|
5806 negptr(result); |
|
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|
5807 jmpb(COMPARE_WIDE_VECTORS_LOOP); |
|
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|
5808 |
|
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|
5809 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors. |
|
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|
5810 bind(VECTOR_NOT_EQUAL); |
|
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|
5811 // clean upper bits of YMM registers |
|
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|
5812 vzeroupper(); |
|
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|
5813 lea(str1, Address(str1, result, scale)); |
|
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|
5814 lea(str2, Address(str2, result, scale)); |
|
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|
5815 jmp(COMPARE_16_CHARS); |
|
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|
5816 |
|
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|
5817 // Compare tail chars, length between 1 to 15 chars |
|
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|
5818 bind(COMPARE_TAIL_LONG); |
|
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|
5819 movl(cnt2, result); |
|
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|
5820 cmpl(cnt2, stride); |
|
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|
5821 jccb(Assembler::less, COMPARE_SMALL_STR); |
|
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5822 |
|
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|
5823 movdqu(vec1, Address(str1, 0)); |
|
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|
5824 pcmpestri(vec1, Address(str2, 0), pcmpmask); |
|
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|
5825 jcc(Assembler::below, COMPARE_INDEX_CHAR); |
|
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|
5826 subptr(cnt2, stride); |
|
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|
5827 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
|
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|
5828 lea(str1, Address(str1, result, scale)); |
|
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|
5829 lea(str2, Address(str2, result, scale)); |
|
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|
5830 negptr(cnt2); |
|
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|
5831 jmpb(WHILE_HEAD_LABEL); |
|
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|
5832 |
|
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|
5833 bind(COMPARE_SMALL_STR); |
|
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|
5834 } else if (UseSSE42Intrinsics) { |
| 7199 | 5835 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL; |
| 5836 int pcmpmask = 0x19; | |
|
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|
5837 // Setup to compare 8-char (16-byte) vectors, |
|
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|
5838 // start from first character again because it has aligned address. |
| 7199 | 5839 movl(result, cnt2); |
| 5840 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count | |
| 5841 jccb(Assembler::zero, COMPARE_TAIL); | |
| 5842 | |
| 5843 lea(str1, Address(str1, result, scale)); | |
| 5844 lea(str2, Address(str2, result, scale)); | |
| 5845 negptr(result); | |
| 5846 | |
| 5847 // pcmpestri | |
| 5848 // inputs: | |
| 5849 // vec1- substring | |
| 5850 // rax - negative string length (elements count) | |
| 5851 // mem - scaned string | |
| 5852 // rdx - string length (elements count) | |
| 5853 // pcmpmask - cmp mode: 11000 (string compare with negated result) | |
| 5854 // + 00 (unsigned bytes) or + 01 (unsigned shorts) | |
| 5855 // outputs: | |
| 5856 // rcx - first mismatched element index | |
| 5857 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); | |
| 5858 | |
| 5859 bind(COMPARE_WIDE_VECTORS); | |
| 5860 movdqu(vec1, Address(str1, result, scale)); | |
| 5861 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); | |
| 5862 // After pcmpestri cnt1(rcx) contains mismatched element index | |
| 5863 | |
| 5864 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1 | |
| 5865 addptr(result, stride); | |
| 5866 subptr(cnt2, stride); | |
| 5867 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS); | |
| 5868 | |
| 5869 // compare wide vectors tail | |
|
7477
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|
5870 testptr(result, result); |
| 7199 | 5871 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
| 5872 | |
| 5873 movl(cnt2, stride); | |
| 5874 movl(result, stride); | |
| 5875 negptr(result); | |
| 5876 movdqu(vec1, Address(str1, result, scale)); | |
| 5877 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); | |
| 5878 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL); | |
| 5879 | |
| 5880 // Mismatched characters in the vectors | |
| 5881 bind(VECTOR_NOT_EQUAL); | |
|
7477
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|
5882 addptr(cnt1, result); |
|
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|
5883 load_unsigned_short(result, Address(str1, cnt1, scale)); |
|
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|
5884 load_unsigned_short(cnt2, Address(str2, cnt1, scale)); |
|
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|
5885 subl(result, cnt2); |
| 7199 | 5886 jmpb(POP_LABEL); |
| 5887 | |
| 5888 bind(COMPARE_TAIL); // limit is zero | |
| 5889 movl(cnt2, result); | |
| 5890 // Fallthru to tail compare | |
| 5891 } | |
| 5892 // Shift str2 and str1 to the end of the arrays, negate min | |
|
7477
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|
5893 lea(str1, Address(str1, cnt2, scale)); |
|
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|
5894 lea(str2, Address(str2, cnt2, scale)); |
|
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|
5895 decrementl(cnt2); // first character was compared already |
| 7199 | 5896 negptr(cnt2); |
| 5897 | |
| 5898 // Compare the rest of the elements | |
| 5899 bind(WHILE_HEAD_LABEL); | |
| 5900 load_unsigned_short(result, Address(str1, cnt2, scale, 0)); | |
| 5901 load_unsigned_short(cnt1, Address(str2, cnt2, scale, 0)); | |
| 5902 subl(result, cnt1); | |
| 5903 jccb(Assembler::notZero, POP_LABEL); | |
| 5904 increment(cnt2); | |
| 5905 jccb(Assembler::notZero, WHILE_HEAD_LABEL); | |
| 5906 | |
| 5907 // Strings are equal up to min length. Return the length difference. | |
| 5908 bind(LENGTH_DIFF_LABEL); | |
| 5909 pop(result); | |
| 5910 jmpb(DONE_LABEL); | |
| 5911 | |
| 5912 // Discard the stored length difference | |
| 5913 bind(POP_LABEL); | |
| 5914 pop(cnt1); | |
| 5915 | |
| 5916 // That's it | |
| 5917 bind(DONE_LABEL); | |
| 5918 } | |
| 5919 | |
| 5920 // Compare char[] arrays aligned to 4 bytes or substrings. | |
| 5921 void MacroAssembler::char_arrays_equals(bool is_array_equ, Register ary1, Register ary2, | |
| 5922 Register limit, Register result, Register chr, | |
| 5923 XMMRegister vec1, XMMRegister vec2) { | |
| 5924 ShortBranchVerifier sbv(this); | |
| 5925 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR; | |
| 5926 | |
| 5927 int length_offset = arrayOopDesc::length_offset_in_bytes(); | |
| 5928 int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR); | |
| 5929 | |
| 5930 // Check the input args | |
| 5931 cmpptr(ary1, ary2); | |
| 5932 jcc(Assembler::equal, TRUE_LABEL); | |
| 5933 | |
| 5934 if (is_array_equ) { | |
| 5935 // Need additional checks for arrays_equals. | |
| 5936 testptr(ary1, ary1); | |
| 5937 jcc(Assembler::zero, FALSE_LABEL); | |
| 5938 testptr(ary2, ary2); | |
| 5939 jcc(Assembler::zero, FALSE_LABEL); | |
| 5940 | |
| 5941 // Check the lengths | |
| 5942 movl(limit, Address(ary1, length_offset)); | |
| 5943 cmpl(limit, Address(ary2, length_offset)); | |
| 5944 jcc(Assembler::notEqual, FALSE_LABEL); | |
| 5945 } | |
| 5946 | |
| 5947 // count == 0 | |
| 5948 testl(limit, limit); | |
| 5949 jcc(Assembler::zero, TRUE_LABEL); | |
| 5950 | |
| 5951 if (is_array_equ) { | |
| 5952 // Load array address | |
| 5953 lea(ary1, Address(ary1, base_offset)); | |
| 5954 lea(ary2, Address(ary2, base_offset)); | |
| 5955 } | |
| 5956 | |
| 5957 shll(limit, 1); // byte count != 0 | |
| 5958 movl(result, limit); // copy | |
| 5959 | |
|
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5960 if (UseAVX >= 2) { |
|
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|
5961 // With AVX2, use 32-byte vector compare |
|
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|
5962 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; |
|
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|
5963 |
|
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|
5964 // Compare 32-byte vectors |
|
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|
5965 andl(result, 0x0000001e); // tail count (in bytes) |
|
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|
5966 andl(limit, 0xffffffe0); // vector count (in bytes) |
|
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|
5967 jccb(Assembler::zero, COMPARE_TAIL); |
|
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|
5968 |
|
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|
5969 lea(ary1, Address(ary1, limit, Address::times_1)); |
|
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|
5970 lea(ary2, Address(ary2, limit, Address::times_1)); |
|
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|
5971 negptr(limit); |
|
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|
5972 |
|
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|
5973 bind(COMPARE_WIDE_VECTORS); |
|
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|
5974 vmovdqu(vec1, Address(ary1, limit, Address::times_1)); |
|
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|
5975 vmovdqu(vec2, Address(ary2, limit, Address::times_1)); |
|
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|
5976 vpxor(vec1, vec2); |
|
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|
5977 |
|
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|
5978 vptest(vec1, vec1); |
|
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|
5979 jccb(Assembler::notZero, FALSE_LABEL); |
|
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|
5980 addptr(limit, 32); |
|
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|
5981 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); |
|
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|
5982 |
|
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|
5983 testl(result, result); |
|
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|
5984 jccb(Assembler::zero, TRUE_LABEL); |
|
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|
5985 |
|
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|
5986 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); |
|
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|
5987 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32)); |
|
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|
5988 vpxor(vec1, vec2); |
|
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|
5989 |
|
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|
5990 vptest(vec1, vec1); |
|
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|
5991 jccb(Assembler::notZero, FALSE_LABEL); |
|
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|
5992 jmpb(TRUE_LABEL); |
|
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|
5993 |
|
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|
5994 bind(COMPARE_TAIL); // limit is zero |
|
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|
5995 movl(limit, result); |
|
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|
5996 // Fallthru to tail compare |
|
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|
5997 } else if (UseSSE42Intrinsics) { |
| 7199 | 5998 // With SSE4.2, use double quad vector compare |
| 5999 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; | |
| 6000 | |
| 6001 // Compare 16-byte vectors | |
| 6002 andl(result, 0x0000000e); // tail count (in bytes) | |
| 6003 andl(limit, 0xfffffff0); // vector count (in bytes) | |
| 6004 jccb(Assembler::zero, COMPARE_TAIL); | |
| 6005 | |
| 6006 lea(ary1, Address(ary1, limit, Address::times_1)); | |
| 6007 lea(ary2, Address(ary2, limit, Address::times_1)); | |
| 6008 negptr(limit); | |
| 6009 | |
| 6010 bind(COMPARE_WIDE_VECTORS); | |
| 6011 movdqu(vec1, Address(ary1, limit, Address::times_1)); | |
| 6012 movdqu(vec2, Address(ary2, limit, Address::times_1)); | |
| 6013 pxor(vec1, vec2); | |
| 6014 | |
| 6015 ptest(vec1, vec1); | |
| 6016 jccb(Assembler::notZero, FALSE_LABEL); | |
| 6017 addptr(limit, 16); | |
| 6018 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); | |
| 6019 | |
| 6020 testl(result, result); | |
| 6021 jccb(Assembler::zero, TRUE_LABEL); | |
| 6022 | |
| 6023 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); | |
| 6024 movdqu(vec2, Address(ary2, result, Address::times_1, -16)); | |
| 6025 pxor(vec1, vec2); | |
| 6026 | |
| 6027 ptest(vec1, vec1); | |
| 6028 jccb(Assembler::notZero, FALSE_LABEL); | |
| 6029 jmpb(TRUE_LABEL); | |
| 6030 | |
| 6031 bind(COMPARE_TAIL); // limit is zero | |
| 6032 movl(limit, result); | |
| 6033 // Fallthru to tail compare | |
| 6034 } | |
| 6035 | |
| 6036 // Compare 4-byte vectors | |
| 6037 andl(limit, 0xfffffffc); // vector count (in bytes) | |
| 6038 jccb(Assembler::zero, COMPARE_CHAR); | |
| 6039 | |
| 6040 lea(ary1, Address(ary1, limit, Address::times_1)); | |
| 6041 lea(ary2, Address(ary2, limit, Address::times_1)); | |
| 6042 negptr(limit); | |
| 6043 | |
| 6044 bind(COMPARE_VECTORS); | |
| 6045 movl(chr, Address(ary1, limit, Address::times_1)); | |
| 6046 cmpl(chr, Address(ary2, limit, Address::times_1)); | |
| 6047 jccb(Assembler::notEqual, FALSE_LABEL); | |
| 6048 addptr(limit, 4); | |
| 6049 jcc(Assembler::notZero, COMPARE_VECTORS); | |
| 6050 | |
| 6051 // Compare trailing char (final 2 bytes), if any | |
| 6052 bind(COMPARE_CHAR); | |
| 6053 testl(result, 0x2); // tail char | |
| 6054 jccb(Assembler::zero, TRUE_LABEL); | |
| 6055 load_unsigned_short(chr, Address(ary1, 0)); | |
| 6056 load_unsigned_short(limit, Address(ary2, 0)); | |
| 6057 cmpl(chr, limit); | |
| 6058 jccb(Assembler::notEqual, FALSE_LABEL); | |
| 6059 | |
| 6060 bind(TRUE_LABEL); | |
| 6061 movl(result, 1); // return true | |
| 6062 jmpb(DONE); | |
| 6063 | |
| 6064 bind(FALSE_LABEL); | |
| 6065 xorl(result, result); // return false | |
| 6066 | |
| 6067 // That's it | |
| 6068 bind(DONE); | |
|
8873
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|
6069 if (UseAVX >= 2) { |
|
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|
6070 // clean upper bits of YMM registers |
|
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|
6071 vzeroupper(); |
|
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|
6072 } |
| 7199 | 6073 } |
| 6074 | |
| 6075 void MacroAssembler::generate_fill(BasicType t, bool aligned, | |
| 6076 Register to, Register value, Register count, | |
| 6077 Register rtmp, XMMRegister xtmp) { | |
| 6078 ShortBranchVerifier sbv(this); | |
| 6079 assert_different_registers(to, value, count, rtmp); | |
| 6080 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
| 6081 Label L_fill_2_bytes, L_fill_4_bytes; | |
| 6082 | |
| 6083 int shift = -1; | |
| 6084 switch (t) { | |
| 6085 case T_BYTE: | |
| 6086 shift = 2; | |
| 6087 break; | |
| 6088 case T_SHORT: | |
| 6089 shift = 1; | |
| 6090 break; | |
| 6091 case T_INT: | |
| 6092 shift = 0; | |
| 6093 break; | |
| 6094 default: ShouldNotReachHere(); | |
| 6095 } | |
| 6096 | |
| 6097 if (t == T_BYTE) { | |
| 6098 andl(value, 0xff); | |
| 6099 movl(rtmp, value); | |
| 6100 shll(rtmp, 8); | |
| 6101 orl(value, rtmp); | |
| 6102 } | |
| 6103 if (t == T_SHORT) { | |
| 6104 andl(value, 0xffff); | |
| 6105 } | |
| 6106 if (t == T_BYTE || t == T_SHORT) { | |
| 6107 movl(rtmp, value); | |
| 6108 shll(rtmp, 16); | |
| 6109 orl(value, rtmp); | |
| 6110 } | |
| 6111 | |
| 6112 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
| 6113 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp | |
| 6114 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { | |
| 6115 // align source address at 4 bytes address boundary | |
| 6116 if (t == T_BYTE) { | |
| 6117 // One byte misalignment happens only for byte arrays | |
| 6118 testptr(to, 1); | |
| 6119 jccb(Assembler::zero, L_skip_align1); | |
| 6120 movb(Address(to, 0), value); | |
| 6121 increment(to); | |
| 6122 decrement(count); | |
| 6123 BIND(L_skip_align1); | |
| 6124 } | |
| 6125 // Two bytes misalignment happens only for byte and short (char) arrays | |
| 6126 testptr(to, 2); | |
| 6127 jccb(Assembler::zero, L_skip_align2); | |
| 6128 movw(Address(to, 0), value); | |
| 6129 addptr(to, 2); | |
| 6130 subl(count, 1<<(shift-1)); | |
| 6131 BIND(L_skip_align2); | |
| 6132 } | |
| 6133 if (UseSSE < 2) { | |
| 6134 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; | |
| 6135 // Fill 32-byte chunks | |
| 6136 subl(count, 8 << shift); | |
| 6137 jcc(Assembler::less, L_check_fill_8_bytes); | |
| 6138 align(16); | |
| 6139 | |
| 6140 BIND(L_fill_32_bytes_loop); | |
| 6141 | |
| 6142 for (int i = 0; i < 32; i += 4) { | |
| 6143 movl(Address(to, i), value); | |
| 6144 } | |
| 6145 | |
| 6146 addptr(to, 32); | |
| 6147 subl(count, 8 << shift); | |
| 6148 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); | |
| 6149 BIND(L_check_fill_8_bytes); | |
| 6150 addl(count, 8 << shift); | |
| 6151 jccb(Assembler::zero, L_exit); | |
| 6152 jmpb(L_fill_8_bytes); | |
| 6153 | |
| 6154 // | |
| 6155 // length is too short, just fill qwords | |
| 6156 // | |
| 6157 BIND(L_fill_8_bytes_loop); | |
| 6158 movl(Address(to, 0), value); | |
| 6159 movl(Address(to, 4), value); | |
| 6160 addptr(to, 8); | |
| 6161 BIND(L_fill_8_bytes); | |
| 6162 subl(count, 1 << (shift + 1)); | |
| 6163 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); | |
| 6164 // fall through to fill 4 bytes | |
| 6165 } else { | |
| 6166 Label L_fill_32_bytes; | |
| 6167 if (!UseUnalignedLoadStores) { | |
| 6168 // align to 8 bytes, we know we are 4 byte aligned to start | |
| 6169 testptr(to, 4); | |
| 6170 jccb(Assembler::zero, L_fill_32_bytes); | |
| 6171 movl(Address(to, 0), value); | |
| 6172 addptr(to, 4); | |
| 6173 subl(count, 1<<shift); | |
| 6174 } | |
| 6175 BIND(L_fill_32_bytes); | |
| 6176 { | |
| 6177 assert( UseSSE >= 2, "supported cpu only" ); | |
| 6178 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; | |
| 6179 movdl(xtmp, value); | |
|
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|
6180 if (UseAVX >= 2 && UseUnalignedLoadStores) { |
|
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|
6181 // Fill 64-byte chunks |
|
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|
6182 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; |
|
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|
6183 vpbroadcastd(xtmp, xtmp); |
|
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|
6184 |
|
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|
6185 subl(count, 16 << shift); |
|
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|
6186 jcc(Assembler::less, L_check_fill_32_bytes); |
|
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|
6187 align(16); |
|
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|
6188 |
|
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|
6189 BIND(L_fill_64_bytes_loop); |
|
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|
6190 vmovdqu(Address(to, 0), xtmp); |
|
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|
6191 vmovdqu(Address(to, 32), xtmp); |
|
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|
6192 addptr(to, 64); |
|
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|
6193 subl(count, 16 << shift); |
|
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|
6194 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); |
|
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|
6195 |
|
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|
6196 BIND(L_check_fill_32_bytes); |
|
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|
6197 addl(count, 8 << shift); |
|
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6198 jccb(Assembler::less, L_check_fill_8_bytes); |
|
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|
6199 vmovdqu(Address(to, 0), xtmp); |
|
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|
6200 addptr(to, 32); |
|
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|
6201 subl(count, 8 << shift); |
|
8873
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|
6202 |
|
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|
6203 BIND(L_check_fill_8_bytes); |
|
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|
6204 // clean upper bits of YMM registers |
|
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|
6205 vzeroupper(); |
| 7199 | 6206 } else { |
|
7475
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|
6207 // Fill 32-byte chunks |
|
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|
6208 pshufd(xtmp, xtmp, 0); |
|
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|
6209 |
|
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changeset
|
6210 subl(count, 8 << shift); |
|
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|
6211 jcc(Assembler::less, L_check_fill_8_bytes); |
|
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|
6212 align(16); |
|
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|
6213 |
|
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|
6214 BIND(L_fill_32_bytes_loop); |
|
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diff
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|
6215 |
|
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diff
changeset
|
6216 if (UseUnalignedLoadStores) { |
|
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|
6217 movdqu(Address(to, 0), xtmp); |
|
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|
6218 movdqu(Address(to, 16), xtmp); |
|
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|
6219 } else { |
|
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changeset
|
6220 movq(Address(to, 0), xtmp); |
|
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|
6221 movq(Address(to, 8), xtmp); |
|
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|
6222 movq(Address(to, 16), xtmp); |
|
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|
6223 movq(Address(to, 24), xtmp); |
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|
6224 } |
|
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|
6225 |
|
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changeset
|
6226 addptr(to, 32); |
|
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changeset
|
6227 subl(count, 8 << shift); |
|
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diff
changeset
|
6228 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); |
|
8873
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|
6229 |
|
e961c11b85fe
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changeset
|
6230 BIND(L_check_fill_8_bytes); |
| 7199 | 6231 } |
| 6232 addl(count, 8 << shift); | |
| 6233 jccb(Assembler::zero, L_exit); | |
| 6234 jmpb(L_fill_8_bytes); | |
| 6235 | |
| 6236 // | |
| 6237 // length is too short, just fill qwords | |
| 6238 // | |
| 6239 BIND(L_fill_8_bytes_loop); | |
| 6240 movq(Address(to, 0), xtmp); | |
| 6241 addptr(to, 8); | |
| 6242 BIND(L_fill_8_bytes); | |
| 6243 subl(count, 1 << (shift + 1)); | |
| 6244 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); | |
| 6245 } | |
| 6246 } | |
| 6247 // fill trailing 4 bytes | |
| 6248 BIND(L_fill_4_bytes); | |
| 6249 testl(count, 1<<shift); | |
| 6250 jccb(Assembler::zero, L_fill_2_bytes); | |
| 6251 movl(Address(to, 0), value); | |
| 6252 if (t == T_BYTE || t == T_SHORT) { | |
| 6253 addptr(to, 4); | |
| 6254 BIND(L_fill_2_bytes); | |
| 6255 // fill trailing 2 bytes | |
| 6256 testl(count, 1<<(shift-1)); | |
| 6257 jccb(Assembler::zero, L_fill_byte); | |
| 6258 movw(Address(to, 0), value); | |
| 6259 if (t == T_BYTE) { | |
| 6260 addptr(to, 2); | |
| 6261 BIND(L_fill_byte); | |
| 6262 // fill trailing byte | |
| 6263 testl(count, 1); | |
| 6264 jccb(Assembler::zero, L_exit); | |
| 6265 movb(Address(to, 0), value); | |
| 6266 } else { | |
| 6267 BIND(L_fill_byte); | |
| 6268 } | |
| 6269 } else { | |
| 6270 BIND(L_fill_2_bytes); | |
| 6271 } | |
| 6272 BIND(L_exit); | |
| 6273 } | |
|
7637
b30b3c2a0cf2
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changeset
|
6274 |
|
b30b3c2a0cf2
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changeset
|
6275 // encode char[] to byte[] in ISO_8859_1 |
|
b30b3c2a0cf2
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|
6276 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len, |
|
b30b3c2a0cf2
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|
6277 XMMRegister tmp1Reg, XMMRegister tmp2Reg, |
|
b30b3c2a0cf2
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|
6278 XMMRegister tmp3Reg, XMMRegister tmp4Reg, |
|
b30b3c2a0cf2
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|
6279 Register tmp5, Register result) { |
|
b30b3c2a0cf2
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|
6280 // rsi: src |
|
b30b3c2a0cf2
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|
6281 // rdi: dst |
|
b30b3c2a0cf2
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|
6282 // rdx: len |
|
b30b3c2a0cf2
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|
6283 // rcx: tmp5 |
|
b30b3c2a0cf2
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|
6284 // rax: result |
|
b30b3c2a0cf2
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changeset
|
6285 ShortBranchVerifier sbv(this); |
|
b30b3c2a0cf2
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changeset
|
6286 assert_different_registers(src, dst, len, tmp5, result); |
|
b30b3c2a0cf2
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|
6287 Label L_done, L_copy_1_char, L_copy_1_char_exit; |
|
b30b3c2a0cf2
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|
6288 |
|
b30b3c2a0cf2
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changeset
|
6289 // set result |
|
b30b3c2a0cf2
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changeset
|
6290 xorl(result, result); |
|
b30b3c2a0cf2
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|
6291 // check for zero length |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6292 testl(len, len); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6293 jcc(Assembler::zero, L_done); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6294 movl(result, len); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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|
6295 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6296 // Setup pointers |
|
b30b3c2a0cf2
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changeset
|
6297 lea(src, Address(src, len, Address::times_2)); // char[] |
|
b30b3c2a0cf2
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changeset
|
6298 lea(dst, Address(dst, len, Address::times_1)); // byte[] |
|
b30b3c2a0cf2
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changeset
|
6299 negptr(len); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6300 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6301 if (UseSSE42Intrinsics || UseAVX >= 2) { |
|
b30b3c2a0cf2
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changeset
|
6302 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit; |
|
b30b3c2a0cf2
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|
6303 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit; |
|
b30b3c2a0cf2
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changeset
|
6304 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6305 if (UseAVX >= 2) { |
|
b30b3c2a0cf2
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changeset
|
6306 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit; |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6307 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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changeset
|
6308 movdl(tmp1Reg, tmp5); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6309 vpbroadcastd(tmp1Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6310 jmpb(L_chars_32_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6311 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6312 bind(L_copy_32_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6313 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6314 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6315 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6316 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6317 jccb(Assembler::notZero, L_copy_32_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6318 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6319 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6320 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6321 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6322 bind(L_chars_32_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6323 addptr(len, 32); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6324 jccb(Assembler::lessEqual, L_copy_32_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6325 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6326 bind(L_copy_32_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6327 subptr(len, 16); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6328 jccb(Assembler::greater, L_copy_16_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6329 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6330 } else if (UseSSE42Intrinsics) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6331 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6332 movdl(tmp1Reg, tmp5); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6333 pshufd(tmp1Reg, tmp1Reg, 0); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6334 jmpb(L_chars_16_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6335 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6336 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6337 bind(L_copy_16_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6338 if (UseAVX >= 2) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6339 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6340 vptest(tmp2Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6341 jccb(Assembler::notZero, L_copy_16_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6342 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6343 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector256 */ true); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6344 } else { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6345 if (UseAVX > 0) { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6346 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6347 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6348 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector256 */ false); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6349 } else { |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6350 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6351 por(tmp2Reg, tmp3Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6352 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6353 por(tmp2Reg, tmp4Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6354 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6355 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6356 jccb(Assembler::notZero, L_copy_16_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6357 packuswb(tmp3Reg, tmp4Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6358 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6359 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6360 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6361 bind(L_chars_16_check); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6362 addptr(len, 16); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6363 jccb(Assembler::lessEqual, L_copy_16_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6364 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6365 bind(L_copy_16_chars_exit); |
|
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6366 if (UseAVX >= 2) { |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6367 // clean upper bits of YMM registers |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6368 vzeroupper(); |
|
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6369 } |
|
7637
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6370 subptr(len, 8); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6371 jccb(Assembler::greater, L_copy_8_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6372 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6373 bind(L_copy_8_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6374 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6375 ptest(tmp3Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6376 jccb(Assembler::notZero, L_copy_8_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6377 packuswb(tmp3Reg, tmp1Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6378 movq(Address(dst, len, Address::times_1, -8), tmp3Reg); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6379 addptr(len, 8); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6380 jccb(Assembler::lessEqual, L_copy_8_chars); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6381 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6382 bind(L_copy_8_chars_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6383 subptr(len, 8); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6384 jccb(Assembler::zero, L_done); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6385 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6386 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6387 bind(L_copy_1_char); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6388 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0)); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6389 testl(tmp5, 0xff00); // check if Unicode char |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6390 jccb(Assembler::notZero, L_copy_1_char_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6391 movb(Address(dst, len, Address::times_1, 0), tmp5); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6392 addptr(len, 1); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6393 jccb(Assembler::less, L_copy_1_char); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6394 |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6395 bind(L_copy_1_char_exit); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6396 addptr(result, len); // len is negative count of not processed elements |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6397 bind(L_done); |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6398 } |
|
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6399 |
|
11080
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6400 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6401 * 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
|
6402 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6403 * @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
|
6404 * @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
|
6405 * @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
|
6406 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6407 * uint32_t crc; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6408 * val = crc_table[(val ^ crc) & 0xFF]; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6409 * crc = val ^ (crc >> 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6410 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6411 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6412 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
|
6413 xorl(val, crc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6414 andl(val, 0xFF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6415 shrl(crc, 8); // unsigned shift |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6416 xorl(crc, Address(table, val, Address::times_4, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6417 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6418 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6419 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6420 * Fold 128-bit data chunk |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6421 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6422 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
|
6423 vpclmulhdq(xtmp, xK, xcrc); // [123:64] |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6424 vpclmulldq(xcrc, xK, xcrc); // [63:0] |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6425 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
|
6426 pxor(xcrc, xtmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6427 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6428 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6429 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
|
6430 vpclmulhdq(xtmp, xK, xcrc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6431 vpclmulldq(xcrc, xK, xcrc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6432 pxor(xcrc, xbuf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6433 pxor(xcrc, xtmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6434 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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parents:
8873
diff
changeset
|
6435 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6436 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6437 * 8-bit folds to compute 32-bit CRC |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6438 * |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6439 * uint64_t xcrc; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6440 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6441 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6442 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
|
6443 movdl(tmp, xcrc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6444 andl(tmp, 0xFF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6445 movdl(xtmp, Address(table, tmp, Address::times_4, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6446 psrldq(xcrc, 1); // unsigned shift one byte |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6447 pxor(xcrc, xtmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6448 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6449 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6450 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6451 * uint32_t crc; |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6452 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6453 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6454 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:
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diff
changeset
|
6455 movl(tmp, crc); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6456 andl(tmp, 0xFF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6457 shrl(crc, 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6458 xorl(crc, Address(table, tmp, Address::times_4, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6459 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6460 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6461 /** |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6462 * @param crc register containing existing CRC (32-bit) |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6463 * @param buf register pointing to input byte buffer (byte*) |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6464 * @param len register containing number of bytes |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6465 * @param table register that will contain address of CRC table |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6466 * @param tmp scratch register |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6467 */ |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6468 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:
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diff
changeset
|
6469 assert_different_registers(crc, buf, len, table, tmp, rax); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6470 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6471 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
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diff
changeset
|
6472 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:
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diff
changeset
|
6473 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6474 lea(table, ExternalAddress(StubRoutines::crc_table_addr())); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6475 notl(crc); // ~crc |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6476 cmpl(len, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6477 jcc(Assembler::less, L_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6478 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6479 // Align buffer to 16 bytes |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6480 movl(tmp, buf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6481 andl(tmp, 0xF); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6482 jccb(Assembler::zero, L_aligned); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6483 subl(tmp, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6484 addl(len, tmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6485 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6486 align(4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6487 BIND(L_align_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6488 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
|
6489 update_byte_crc32(crc, rax, table); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6490 increment(buf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6491 incrementl(tmp); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6492 jccb(Assembler::less, L_align_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6493 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6494 BIND(L_aligned); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6495 movl(tmp, len); // save |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6496 shrl(len, 4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6497 jcc(Assembler::zero, L_tail_restore); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6498 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6499 // Fold crc into first bytes of vector |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6500 movdqa(xmm1, Address(buf, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6501 movdl(rax, xmm1); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6502 xorl(crc, rax); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6503 pinsrd(xmm1, crc, 0); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6504 addptr(buf, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6505 subl(len, 4); // len > 0 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6506 jcc(Assembler::less, L_fold_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6507 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6508 movdqa(xmm2, Address(buf, 0)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6509 movdqa(xmm3, Address(buf, 16)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6510 movdqa(xmm4, Address(buf, 32)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6511 addptr(buf, 48); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6512 subl(len, 3); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6513 jcc(Assembler::lessEqual, L_fold_512b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6514 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6515 // 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
|
6516 // 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
|
6517 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
|
6518 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6519 align(32); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6520 BIND(L_fold_512b_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6521 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6522 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6523 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6524 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6525 addptr(buf, 64); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6526 subl(len, 4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6527 jcc(Assembler::greater, L_fold_512b_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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8873
diff
changeset
|
6528 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6529 // Fold 512 bits to 128 bits. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6530 BIND(L_fold_512b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6531 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6532 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6533 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6534 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6535 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6536 // Fold the rest of 128 bits data chunks |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6537 BIND(L_fold_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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parents:
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diff
changeset
|
6538 addl(len, 3); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6539 jccb(Assembler::lessEqual, L_fold_128b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6540 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6541 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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8873
diff
changeset
|
6542 BIND(L_fold_tail_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6543 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6544 addptr(buf, 16); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6545 decrementl(len); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6546 jccb(Assembler::greater, L_fold_tail_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6547 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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8873
diff
changeset
|
6548 // 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
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8873
diff
changeset
|
6549 BIND(L_fold_128b); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6550 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr())); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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8873
diff
changeset
|
6551 vpclmulqdq(xmm2, xmm0, xmm1, 0x1); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6552 vpand(xmm3, xmm0, xmm2, false /* vector256 */); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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8873
diff
changeset
|
6553 vpclmulqdq(xmm0, xmm0, xmm3, 0x1); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6554 psrldq(xmm1, 8); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6555 psrldq(xmm2, 4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6556 pxor(xmm0, xmm1); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6557 pxor(xmm0, xmm2); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6558 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6559 // 8 8-bit folds to compute 32-bit CRC. |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6560 for (int j = 0; j < 4; j++) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6561 fold_8bit_crc32(xmm0, table, xmm1, rax); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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|
6562 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6563 movdl(crc, xmm0); // mov 32 bits to general register |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6564 for (int j = 0; j < 4; j++) { |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6565 fold_8bit_crc32(crc, table, rax); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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|
6566 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6567 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6568 BIND(L_tail_restore); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6569 movl(len, tmp); // restore |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6570 BIND(L_tail); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6571 andl(len, 0xf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6572 jccb(Assembler::zero, L_exit); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6573 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6574 // Fold the rest of bytes |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6575 align(4); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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changeset
|
6576 BIND(L_tail_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6577 movsbl(rax, Address(buf, 0)); // load byte with sign extension |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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diff
changeset
|
6578 update_byte_crc32(crc, rax, table); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
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changeset
|
6579 increment(buf); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6580 decrementl(len); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6581 jccb(Assembler::greater, L_tail_loop); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6582 |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6583 BIND(L_exit); |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6584 notl(crc); // ~c |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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diff
changeset
|
6585 } |
|
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
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changeset
|
6586 |
| 7199 | 6587 #undef BIND |
| 6588 #undef BLOCK_COMMENT | |
| 6589 | |
| 6590 | |
| 6591 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { | |
| 6592 switch (cond) { | |
| 6593 // Note some conditions are synonyms for others | |
| 6594 case Assembler::zero: return Assembler::notZero; | |
| 6595 case Assembler::notZero: return Assembler::zero; | |
| 6596 case Assembler::less: return Assembler::greaterEqual; | |
| 6597 case Assembler::lessEqual: return Assembler::greater; | |
| 6598 case Assembler::greater: return Assembler::lessEqual; | |
| 6599 case Assembler::greaterEqual: return Assembler::less; | |
| 6600 case Assembler::below: return Assembler::aboveEqual; | |
| 6601 case Assembler::belowEqual: return Assembler::above; | |
| 6602 case Assembler::above: return Assembler::belowEqual; | |
| 6603 case Assembler::aboveEqual: return Assembler::below; | |
| 6604 case Assembler::overflow: return Assembler::noOverflow; | |
| 6605 case Assembler::noOverflow: return Assembler::overflow; | |
| 6606 case Assembler::negative: return Assembler::positive; | |
| 6607 case Assembler::positive: return Assembler::negative; | |
| 6608 case Assembler::parity: return Assembler::noParity; | |
| 6609 case Assembler::noParity: return Assembler::parity; | |
| 6610 } | |
| 6611 ShouldNotReachHere(); return Assembler::overflow; | |
| 6612 } | |
| 6613 | |
| 6614 SkipIfEqual::SkipIfEqual( | |
| 6615 MacroAssembler* masm, const bool* flag_addr, bool value) { | |
| 6616 _masm = masm; | |
| 6617 _masm->cmp8(ExternalAddress((address)flag_addr), value); | |
| 6618 _masm->jcc(Assembler::equal, _label); | |
| 6619 } | |
| 6620 | |
| 6621 SkipIfEqual::~SkipIfEqual() { | |
| 6622 _masm->bind(_label); | |
| 6623 } |