Mercurial > hg > graal-compiler
annotate src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 10479:40b8c383bc31
Throw InvalidInstalledCodeException directly in the stubs.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Sun, 23 Jun 2013 15:49:01 +0200 |
| parents | 291ffc492eb6 |
| children | 6b0fd0964b87 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.inline.hpp" |
| 1972 | 27 #include "interpreter/interpreter.hpp" |
| 28 #include "nativeInst_sparc.hpp" | |
| 29 #include "oops/instanceOop.hpp" | |
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30 #include "oops/method.hpp" |
| 1972 | 31 #include "oops/objArrayKlass.hpp" |
| 32 #include "oops/oop.inline.hpp" | |
| 33 #include "prims/methodHandles.hpp" | |
| 34 #include "runtime/frame.inline.hpp" | |
| 35 #include "runtime/handles.inline.hpp" | |
| 36 #include "runtime/sharedRuntime.hpp" | |
| 37 #include "runtime/stubCodeGenerator.hpp" | |
| 38 #include "runtime/stubRoutines.hpp" | |
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39 #include "runtime/thread.inline.hpp" |
| 1972 | 40 #include "utilities/top.hpp" |
| 41 #ifdef COMPILER2 | |
| 42 #include "opto/runtime.hpp" | |
| 43 #endif | |
| 0 | 44 |
| 45 // Declaration and definition of StubGenerator (no .hpp file). | |
| 46 // For a more detailed description of the stub routine structure | |
| 47 // see the comment in stubRoutines.hpp. | |
| 48 | |
| 49 #define __ _masm-> | |
| 50 | |
| 51 #ifdef PRODUCT | |
| 52 #define BLOCK_COMMENT(str) /* nothing */ | |
| 53 #else | |
| 54 #define BLOCK_COMMENT(str) __ block_comment(str) | |
| 55 #endif | |
| 56 | |
| 57 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
| 58 | |
| 59 // Note: The register L7 is used as L7_thread_cache, and may not be used | |
| 60 // any other way within this module. | |
| 61 | |
| 62 | |
| 63 static const Register& Lstub_temp = L2; | |
| 64 | |
| 65 // ------------------------------------------------------------------------------------------------------------------------- | |
| 66 // Stub Code definitions | |
| 67 | |
| 68 static address handle_unsafe_access() { | |
| 69 JavaThread* thread = JavaThread::current(); | |
| 70 address pc = thread->saved_exception_pc(); | |
| 71 address npc = thread->saved_exception_npc(); | |
| 72 // pc is the instruction which we must emulate | |
| 73 // doing a no-op is fine: return garbage from the load | |
| 74 | |
| 75 // request an async exception | |
| 76 thread->set_pending_unsafe_access_error(); | |
| 77 | |
| 78 // return address of next instruction to execute | |
| 79 return npc; | |
| 80 } | |
| 81 | |
| 82 class StubGenerator: public StubCodeGenerator { | |
| 83 private: | |
| 84 | |
| 85 #ifdef PRODUCT | |
| 86 #define inc_counter_np(a,b,c) (0) | |
| 87 #else | |
| 88 #define inc_counter_np(counter, t1, t2) \ | |
| 89 BLOCK_COMMENT("inc_counter " #counter); \ | |
| 727 | 90 __ inc_counter(&counter, t1, t2); |
| 0 | 91 #endif |
| 92 | |
| 93 //---------------------------------------------------------------------------------------------------- | |
| 94 // Call stubs are used to call Java from C | |
| 95 | |
| 96 address generate_call_stub(address& return_pc) { | |
| 97 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
| 98 address start = __ pc(); | |
| 99 | |
| 100 // Incoming arguments: | |
| 101 // | |
| 102 // o0 : call wrapper address | |
| 103 // o1 : result (address) | |
| 104 // o2 : result type | |
| 105 // o3 : method | |
| 106 // o4 : (interpreter) entry point | |
| 107 // o5 : parameters (address) | |
| 108 // [sp + 0x5c]: parameter size (in words) | |
| 109 // [sp + 0x60]: thread | |
| 110 // | |
| 111 // +---------------+ <--- sp + 0 | |
| 112 // | | | |
| 113 // . reg save area . | |
| 114 // | | | |
| 115 // +---------------+ <--- sp + 0x40 | |
| 116 // | | | |
| 117 // . extra 7 slots . | |
| 118 // | | | |
| 119 // +---------------+ <--- sp + 0x5c | |
| 120 // | param. size | | |
| 121 // +---------------+ <--- sp + 0x60 | |
| 122 // | thread | | |
| 123 // +---------------+ | |
| 124 // | | | |
| 125 | |
| 126 // note: if the link argument position changes, adjust | |
| 127 // the code in frame::entry_frame_call_wrapper() | |
| 128 | |
| 129 const Argument link = Argument(0, false); // used only for GC | |
| 130 const Argument result = Argument(1, false); | |
| 131 const Argument result_type = Argument(2, false); | |
| 132 const Argument method = Argument(3, false); | |
| 133 const Argument entry_point = Argument(4, false); | |
| 134 const Argument parameters = Argument(5, false); | |
| 135 const Argument parameter_size = Argument(6, false); | |
| 136 const Argument thread = Argument(7, false); | |
| 137 | |
| 138 // setup thread register | |
| 139 __ ld_ptr(thread.as_address(), G2_thread); | |
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140 __ reinit_heapbase(); |
| 0 | 141 |
| 142 #ifdef ASSERT | |
| 143 // make sure we have no pending exceptions | |
| 144 { const Register t = G3_scratch; | |
| 145 Label L; | |
| 146 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), t); | |
| 3839 | 147 __ br_null_short(t, Assembler::pt, L); |
| 0 | 148 __ stop("StubRoutines::call_stub: entered with pending exception"); |
| 149 __ bind(L); | |
| 150 } | |
| 151 #endif | |
| 152 | |
| 153 // create activation frame & allocate space for parameters | |
| 154 { const Register t = G3_scratch; | |
| 155 __ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words) | |
| 156 __ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words) | |
| 157 __ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words) | |
| 1506 | 158 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
| 0 | 159 __ neg(t); // negate so it can be used with save |
| 160 __ save(SP, t, SP); // setup new frame | |
| 161 } | |
| 162 | |
| 163 // +---------------+ <--- sp + 0 | |
| 164 // | | | |
| 165 // . reg save area . | |
| 166 // | | | |
| 167 // +---------------+ <--- sp + 0x40 | |
| 168 // | | | |
| 169 // . extra 7 slots . | |
| 170 // | | | |
| 171 // +---------------+ <--- sp + 0x5c | |
| 172 // | empty slot | (only if parameter size is even) | |
| 173 // +---------------+ | |
| 174 // | | | |
| 175 // . parameters . | |
| 176 // | | | |
| 177 // +---------------+ <--- fp + 0 | |
| 178 // | | | |
| 179 // . reg save area . | |
| 180 // | | | |
| 181 // +---------------+ <--- fp + 0x40 | |
| 182 // | | | |
| 183 // . extra 7 slots . | |
| 184 // | | | |
| 185 // +---------------+ <--- fp + 0x5c | |
| 186 // | param. size | | |
| 187 // +---------------+ <--- fp + 0x60 | |
| 188 // | thread | | |
| 189 // +---------------+ | |
| 190 // | | | |
| 191 | |
| 192 // pass parameters if any | |
| 193 BLOCK_COMMENT("pass parameters if any"); | |
| 194 { const Register src = parameters.as_in().as_register(); | |
| 195 const Register dst = Lentry_args; | |
| 196 const Register tmp = G3_scratch; | |
| 197 const Register cnt = G4_scratch; | |
| 198 | |
| 199 // test if any parameters & setup of Lentry_args | |
| 200 Label exit; | |
| 201 __ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter | |
| 202 __ add( FP, STACK_BIAS, dst ); | |
| 3839 | 203 __ cmp_zero_and_br(Assembler::zero, cnt, exit); |
| 0 | 204 __ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args |
| 205 | |
| 206 // copy parameters if any | |
| 207 Label loop; | |
| 208 __ BIND(loop); | |
| 209 // Store parameter value | |
| 210 __ ld_ptr(src, 0, tmp); | |
| 211 __ add(src, BytesPerWord, src); | |
| 1506 | 212 __ st_ptr(tmp, dst, 0); |
| 0 | 213 __ deccc(cnt); |
| 214 __ br(Assembler::greater, false, Assembler::pt, loop); | |
| 1506 | 215 __ delayed()->sub(dst, Interpreter::stackElementSize, dst); |
| 0 | 216 |
| 217 // done | |
| 218 __ BIND(exit); | |
| 219 } | |
| 220 | |
| 221 // setup parameters, method & call Java function | |
| 222 #ifdef ASSERT | |
| 223 // layout_activation_impl checks it's notion of saved SP against | |
| 224 // this register, so if this changes update it as well. | |
| 225 const Register saved_SP = Lscratch; | |
| 226 __ mov(SP, saved_SP); // keep track of SP before call | |
| 227 #endif | |
| 228 | |
| 229 // setup parameters | |
| 230 const Register t = G3_scratch; | |
| 231 __ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words) | |
| 1506 | 232 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
| 0 | 233 __ sub(FP, t, Gargs); // setup parameter pointer |
| 234 #ifdef _LP64 | |
| 235 __ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias | |
| 236 #endif | |
| 237 __ mov(SP, O5_savedSP); | |
| 238 | |
| 239 | |
| 240 // do the call | |
| 241 // | |
| 242 // the following register must be setup: | |
| 243 // | |
| 244 // G2_thread | |
| 245 // G5_method | |
| 246 // Gargs | |
| 247 BLOCK_COMMENT("call Java function"); | |
| 248 __ jmpl(entry_point.as_in().as_register(), G0, O7); | |
| 249 __ delayed()->mov(method.as_in().as_register(), G5_method); // setup method | |
| 250 | |
| 251 BLOCK_COMMENT("call_stub_return_address:"); | |
| 252 return_pc = __ pc(); | |
| 253 | |
| 254 // The callee, if it wasn't interpreted, can return with SP changed so | |
| 255 // we can no longer assert of change of SP. | |
| 256 | |
| 257 // store result depending on type | |
| 258 // (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE | |
| 259 // is treated as T_INT) | |
| 260 { const Register addr = result .as_in().as_register(); | |
| 261 const Register type = result_type.as_in().as_register(); | |
| 262 Label is_long, is_float, is_double, is_object, exit; | |
| 263 __ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object); | |
| 264 __ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float); | |
| 265 __ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double); | |
| 266 __ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long); | |
| 267 __ delayed()->nop(); | |
| 268 | |
| 269 // store int result | |
| 270 __ st(O0, addr, G0); | |
| 271 | |
| 272 __ BIND(exit); | |
| 273 __ ret(); | |
| 274 __ delayed()->restore(); | |
| 275 | |
| 276 __ BIND(is_object); | |
| 3839 | 277 __ ba(exit); |
| 0 | 278 __ delayed()->st_ptr(O0, addr, G0); |
| 279 | |
| 280 __ BIND(is_float); | |
| 3839 | 281 __ ba(exit); |
| 0 | 282 __ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0); |
| 283 | |
| 284 __ BIND(is_double); | |
| 3839 | 285 __ ba(exit); |
| 0 | 286 __ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0); |
| 287 | |
| 288 __ BIND(is_long); | |
| 289 #ifdef _LP64 | |
| 3839 | 290 __ ba(exit); |
| 0 | 291 __ delayed()->st_long(O0, addr, G0); // store entire long |
| 292 #else | |
| 293 #if defined(COMPILER2) | |
| 294 // All return values are where we want them, except for Longs. C2 returns | |
| 295 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
| 296 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
| 297 // build we simply always use G1. | |
| 298 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
| 299 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
| 300 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
| 301 | |
| 3839 | 302 __ ba(exit); |
| 0 | 303 __ delayed()->stx(G1, addr, G0); // store entire long |
| 304 #else | |
| 305 __ st(O1, addr, BytesPerInt); | |
| 3839 | 306 __ ba(exit); |
| 0 | 307 __ delayed()->st(O0, addr, G0); |
| 308 #endif /* COMPILER2 */ | |
| 309 #endif /* _LP64 */ | |
| 310 } | |
| 311 return start; | |
| 312 } | |
| 313 | |
| 314 | |
| 315 //---------------------------------------------------------------------------------------------------- | |
| 316 // Return point for a Java call if there's an exception thrown in Java code. | |
| 317 // The exception is caught and transformed into a pending exception stored in | |
| 318 // JavaThread that can be tested from within the VM. | |
| 319 // | |
| 320 // Oexception: exception oop | |
| 321 | |
| 322 address generate_catch_exception() { | |
| 323 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
| 324 | |
| 325 address start = __ pc(); | |
| 326 // verify that thread corresponds | |
| 327 __ verify_thread(); | |
| 328 | |
| 329 const Register& temp_reg = Gtemp; | |
| 727 | 330 Address pending_exception_addr (G2_thread, Thread::pending_exception_offset()); |
| 331 Address exception_file_offset_addr(G2_thread, Thread::exception_file_offset ()); | |
| 332 Address exception_line_offset_addr(G2_thread, Thread::exception_line_offset ()); | |
| 0 | 333 |
| 334 // set pending exception | |
| 335 __ verify_oop(Oexception); | |
| 336 __ st_ptr(Oexception, pending_exception_addr); | |
| 337 __ set((intptr_t)__FILE__, temp_reg); | |
| 338 __ st_ptr(temp_reg, exception_file_offset_addr); | |
| 339 __ set((intptr_t)__LINE__, temp_reg); | |
| 340 __ st(temp_reg, exception_line_offset_addr); | |
| 341 | |
| 342 // complete return to VM | |
| 343 assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before"); | |
| 344 | |
| 727 | 345 AddressLiteral stub_ret(StubRoutines::_call_stub_return_address); |
| 346 __ jump_to(stub_ret, temp_reg); | |
| 0 | 347 __ delayed()->nop(); |
| 348 | |
| 349 return start; | |
| 350 } | |
| 351 | |
| 352 | |
| 353 //---------------------------------------------------------------------------------------------------- | |
| 354 // Continuation point for runtime calls returning with a pending exception | |
| 355 // The pending exception check happened in the runtime or native call stub | |
| 356 // The pending exception in Thread is converted into a Java-level exception | |
| 357 // | |
| 358 // Contract with Java-level exception handler: O0 = exception | |
| 359 // O1 = throwing pc | |
| 360 | |
| 361 address generate_forward_exception() { | |
| 362 StubCodeMark mark(this, "StubRoutines", "forward_exception"); | |
| 363 address start = __ pc(); | |
| 364 | |
| 365 // Upon entry, O7 has the return address returning into Java | |
| 366 // (interpreted or compiled) code; i.e. the return address | |
| 367 // becomes the throwing pc. | |
| 368 | |
| 369 const Register& handler_reg = Gtemp; | |
| 370 | |
| 727 | 371 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| 0 | 372 |
| 373 #ifdef ASSERT | |
| 374 // make sure that this code is only executed if there is a pending exception | |
| 375 { Label L; | |
| 376 __ ld_ptr(exception_addr, Gtemp); | |
| 3839 | 377 __ br_notnull_short(Gtemp, Assembler::pt, L); |
| 0 | 378 __ stop("StubRoutines::forward exception: no pending exception (1)"); |
| 379 __ bind(L); | |
| 380 } | |
| 381 #endif | |
| 382 | |
| 383 // compute exception handler into handler_reg | |
| 384 __ get_thread(); | |
| 385 __ ld_ptr(exception_addr, Oexception); | |
| 386 __ verify_oop(Oexception); | |
| 387 __ save_frame(0); // compensates for compiler weakness | |
| 388 __ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC | |
| 389 BLOCK_COMMENT("call exception_handler_for_return_address"); | |
| 1295 | 390 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), G2_thread, Lscratch); |
| 0 | 391 __ mov(O0, handler_reg); |
| 392 __ restore(); // compensates for compiler weakness | |
| 393 | |
| 394 __ ld_ptr(exception_addr, Oexception); | |
| 395 __ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC | |
| 396 | |
| 397 #ifdef ASSERT | |
| 398 // make sure exception is set | |
| 399 { Label L; | |
| 3839 | 400 __ br_notnull_short(Oexception, Assembler::pt, L); |
| 0 | 401 __ stop("StubRoutines::forward exception: no pending exception (2)"); |
| 402 __ bind(L); | |
| 403 } | |
| 404 #endif | |
| 405 // jump to exception handler | |
| 406 __ jmp(handler_reg, 0); | |
| 407 // clear pending exception | |
| 408 __ delayed()->st_ptr(G0, exception_addr); | |
| 409 | |
| 410 return start; | |
| 411 } | |
| 412 | |
| 413 | |
| 414 //------------------------------------------------------------------------------------------------------------------------ | |
| 415 // Continuation point for throwing of implicit exceptions that are not handled in | |
| 416 // the current activation. Fabricates an exception oop and initiates normal | |
| 417 // exception dispatching in this frame. Only callee-saved registers are preserved | |
| 418 // (through the normal register window / RegisterMap handling). | |
| 419 // If the compiler needs all registers to be preserved between the fault | |
| 420 // point and the exception handler then it must assume responsibility for that in | |
| 421 // AbstractCompiler::continuation_for_implicit_null_exception or | |
| 422 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
| 423 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
| 424 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
| 425 // so caller saved registers were assumed volatile in the compiler. | |
| 426 | |
| 427 // Note that we generate only this stub into a RuntimeStub, because it needs to be | |
| 428 // properly traversed and ignored during GC, so we change the meaning of the "__" | |
| 429 // macro within this method. | |
| 430 #undef __ | |
| 431 #define __ masm-> | |
| 432 | |
| 3937 | 433 address generate_throw_exception(const char* name, address runtime_entry, |
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434 Register arg1 = noreg, Register arg2 = noreg) { |
| 0 | 435 #ifdef ASSERT |
| 436 int insts_size = VerifyThread ? 1 * K : 600; | |
| 437 #else | |
| 438 int insts_size = VerifyThread ? 1 * K : 256; | |
| 439 #endif /* ASSERT */ | |
| 440 int locs_size = 32; | |
| 441 | |
| 442 CodeBuffer code(name, insts_size, locs_size); | |
| 443 MacroAssembler* masm = new MacroAssembler(&code); | |
| 444 | |
| 445 __ verify_thread(); | |
| 446 | |
| 447 // This is an inlined and slightly modified version of call_VM | |
| 448 // which has the ability to fetch the return PC out of thread-local storage | |
| 449 __ assert_not_delayed(); | |
| 450 | |
| 451 // Note that we always push a frame because on the SPARC | |
| 452 // architecture, for all of our implicit exception kinds at call | |
| 453 // sites, the implicit exception is taken before the callee frame | |
| 454 // is pushed. | |
| 455 __ save_frame(0); | |
| 456 | |
| 457 int frame_complete = __ offset(); | |
| 458 | |
| 459 // Note that we always have a runtime stub frame on the top of stack by this point | |
| 460 Register last_java_sp = SP; | |
| 461 // 64-bit last_java_sp is biased! | |
| 462 __ set_last_Java_frame(last_java_sp, G0); | |
| 463 if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early | |
| 464 __ save_thread(noreg); | |
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465 if (arg1 != noreg) { |
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466 assert(arg2 != O1, "clobbered"); |
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467 __ mov(arg1, O1); |
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468 } |
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469 if (arg2 != noreg) { |
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470 __ mov(arg2, O2); |
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471 } |
| 0 | 472 // do the call |
| 473 BLOCK_COMMENT("call runtime_entry"); | |
| 474 __ call(runtime_entry, relocInfo::runtime_call_type); | |
| 475 if (!VerifyThread) | |
| 476 __ delayed()->mov(G2_thread, O0); // pass thread as first argument | |
| 477 else | |
| 478 __ delayed()->nop(); // (thread already passed) | |
| 479 __ restore_thread(noreg); | |
| 480 __ reset_last_Java_frame(); | |
| 481 | |
| 482 // check for pending exceptions. use Gtemp as scratch register. | |
| 483 #ifdef ASSERT | |
| 484 Label L; | |
| 485 | |
| 727 | 486 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| 0 | 487 Register scratch_reg = Gtemp; |
| 488 __ ld_ptr(exception_addr, scratch_reg); | |
| 3839 | 489 __ br_notnull_short(scratch_reg, Assembler::pt, L); |
| 0 | 490 __ should_not_reach_here(); |
| 491 __ bind(L); | |
| 492 #endif // ASSERT | |
| 493 BLOCK_COMMENT("call forward_exception_entry"); | |
| 494 __ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
| 495 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
| 496 __ delayed()->restore(); | |
| 497 | |
| 498 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false); | |
| 499 return stub->entry_point(); | |
| 500 } | |
| 501 | |
| 502 #undef __ | |
| 503 #define __ _masm-> | |
| 504 | |
| 505 | |
| 506 // Generate a routine that sets all the registers so we | |
| 507 // can tell if the stop routine prints them correctly. | |
| 508 address generate_test_stop() { | |
| 509 StubCodeMark mark(this, "StubRoutines", "test_stop"); | |
| 510 address start = __ pc(); | |
| 511 | |
| 512 int i; | |
| 513 | |
| 514 __ save_frame(0); | |
| 515 | |
| 516 static jfloat zero = 0.0, one = 1.0; | |
| 517 | |
| 518 // put addr in L0, then load through L0 to F0 | |
| 519 __ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0); | |
| 520 __ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1 | |
| 521 | |
| 522 // use add to put 2..18 in F2..F18 | |
| 523 for ( i = 2; i <= 18; ++i ) { | |
| 524 __ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i)); | |
| 525 } | |
| 526 | |
| 527 // Now put double 2 in F16, double 18 in F18 | |
| 528 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 ); | |
| 529 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 ); | |
| 530 | |
| 531 // use add to put 20..32 in F20..F32 | |
| 532 for (i = 20; i < 32; i += 2) { | |
| 533 __ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i)); | |
| 534 } | |
| 535 | |
| 536 // put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's | |
| 537 for ( i = 0; i < 8; ++i ) { | |
| 538 if (i < 6) { | |
| 539 __ set( i, as_iRegister(i)); | |
| 540 __ set(16 + i, as_oRegister(i)); | |
| 541 __ set(24 + i, as_gRegister(i)); | |
| 542 } | |
| 543 __ set( 8 + i, as_lRegister(i)); | |
| 544 } | |
| 545 | |
| 546 __ stop("testing stop"); | |
| 547 | |
| 548 | |
| 549 __ ret(); | |
| 550 __ delayed()->restore(); | |
| 551 | |
| 552 return start; | |
| 553 } | |
| 554 | |
| 555 | |
| 556 address generate_stop_subroutine() { | |
| 557 StubCodeMark mark(this, "StubRoutines", "stop_subroutine"); | |
| 558 address start = __ pc(); | |
| 559 | |
| 560 __ stop_subroutine(); | |
| 561 | |
| 562 return start; | |
| 563 } | |
| 564 | |
| 565 address generate_flush_callers_register_windows() { | |
| 566 StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows"); | |
| 567 address start = __ pc(); | |
| 568 | |
| 569 __ flush_windows(); | |
| 570 __ retl(false); | |
| 571 __ delayed()->add( FP, STACK_BIAS, O0 ); | |
| 572 // The returned value must be a stack pointer whose register save area | |
| 573 // is flushed, and will stay flushed while the caller executes. | |
| 574 | |
| 575 return start; | |
| 576 } | |
| 577 | |
| 578 // Helper functions for v8 atomic operations. | |
| 579 // | |
| 580 void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) { | |
| 581 if (mark_oop_reg == noreg) { | |
| 582 address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(); | |
| 583 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
| 584 } else { | |
| 585 assert(scratch_reg != noreg, "just checking"); | |
| 586 address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache; | |
| 587 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
| 588 __ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg); | |
| 589 __ add(lock_ptr_reg, scratch_reg, lock_ptr_reg); | |
| 590 } | |
| 591 } | |
| 592 | |
| 593 void generate_v8_lock_prologue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) { | |
| 594 | |
| 595 get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg); | |
| 596 __ set(StubRoutines::Sparc::locked, lock_reg); | |
| 597 // Initialize yield counter | |
| 598 __ mov(G0,yield_reg); | |
| 599 | |
| 600 __ BIND(retry); | |
| 3839 | 601 __ cmp_and_br_short(yield_reg, V8AtomicOperationUnderLockSpinCount, Assembler::less, Assembler::pt, dontyield); |
| 0 | 602 |
| 603 // This code can only be called from inside the VM, this | |
| 604 // stub is only invoked from Atomic::add(). We do not | |
| 605 // want to use call_VM, because _last_java_sp and such | |
| 606 // must already be set. | |
| 607 // | |
| 608 // Save the regs and make space for a C call | |
| 609 __ save(SP, -96, SP); | |
| 610 __ save_all_globals_into_locals(); | |
| 611 BLOCK_COMMENT("call os::naked_sleep"); | |
| 612 __ call(CAST_FROM_FN_PTR(address, os::naked_sleep)); | |
| 613 __ delayed()->nop(); | |
| 614 __ restore_globals_from_locals(); | |
| 615 __ restore(); | |
| 616 // reset the counter | |
| 617 __ mov(G0,yield_reg); | |
| 618 | |
| 619 __ BIND(dontyield); | |
| 620 | |
| 621 // try to get lock | |
| 622 __ swap(lock_ptr_reg, 0, lock_reg); | |
| 623 | |
| 624 // did we get the lock? | |
| 625 __ cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
| 626 __ br(Assembler::notEqual, true, Assembler::pn, retry); | |
| 627 __ delayed()->add(yield_reg,1,yield_reg); | |
| 628 | |
| 629 // yes, got lock. do the operation here. | |
| 630 } | |
| 631 | |
| 632 void generate_v8_lock_epilogue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) { | |
| 633 __ st(lock_reg, lock_ptr_reg, 0); // unlock | |
| 634 } | |
| 635 | |
| 636 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest). | |
| 637 // | |
| 638 // Arguments : | |
| 639 // | |
| 640 // exchange_value: O0 | |
| 641 // dest: O1 | |
| 642 // | |
| 643 // Results: | |
| 644 // | |
| 645 // O0: the value previously stored in dest | |
| 646 // | |
| 647 address generate_atomic_xchg() { | |
| 648 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
| 649 address start = __ pc(); | |
| 650 | |
| 651 if (UseCASForSwap) { | |
| 652 // Use CAS instead of swap, just in case the MP hardware | |
| 653 // prefers to work with just one kind of synch. instruction. | |
| 654 Label retry; | |
| 655 __ BIND(retry); | |
| 656 __ mov(O0, O3); // scratch copy of exchange value | |
| 657 __ ld(O1, 0, O2); // observe the previous value | |
| 658 // try to replace O2 with O3 | |
| 659 __ cas_under_lock(O1, O2, O3, | |
| 660 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
| 3839 | 661 __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry); |
| 0 | 662 |
| 663 __ retl(false); | |
| 664 __ delayed()->mov(O2, O0); // report previous value to caller | |
| 665 | |
| 666 } else { | |
| 667 if (VM_Version::v9_instructions_work()) { | |
| 668 __ retl(false); | |
| 669 __ delayed()->swap(O1, 0, O0); | |
| 670 } else { | |
| 671 const Register& lock_reg = O2; | |
| 672 const Register& lock_ptr_reg = O3; | |
| 673 const Register& yield_reg = O4; | |
| 674 | |
| 675 Label retry; | |
| 676 Label dontyield; | |
| 677 | |
| 678 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 679 // got the lock, do the swap | |
| 680 __ swap(O1, 0, O0); | |
| 681 | |
| 682 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 683 __ retl(false); | |
| 684 __ delayed()->nop(); | |
| 685 } | |
| 686 } | |
| 687 | |
| 688 return start; | |
| 689 } | |
| 690 | |
| 691 | |
| 692 // Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) | |
| 693 // | |
| 694 // Arguments : | |
| 695 // | |
| 696 // exchange_value: O0 | |
| 697 // dest: O1 | |
| 698 // compare_value: O2 | |
| 699 // | |
| 700 // Results: | |
| 701 // | |
| 702 // O0: the value previously stored in dest | |
| 703 // | |
| 704 // Overwrites (v8): O3,O4,O5 | |
| 705 // | |
| 706 address generate_atomic_cmpxchg() { | |
| 707 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
| 708 address start = __ pc(); | |
| 709 | |
| 710 // cmpxchg(dest, compare_value, exchange_value) | |
| 711 __ cas_under_lock(O1, O2, O0, | |
| 712 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
| 713 __ retl(false); | |
| 714 __ delayed()->nop(); | |
| 715 | |
| 716 return start; | |
| 717 } | |
| 718 | |
| 719 // Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value) | |
| 720 // | |
| 721 // Arguments : | |
| 722 // | |
| 723 // exchange_value: O1:O0 | |
| 724 // dest: O2 | |
| 725 // compare_value: O4:O3 | |
| 726 // | |
| 727 // Results: | |
| 728 // | |
| 729 // O1:O0: the value previously stored in dest | |
| 730 // | |
| 731 // This only works on V9, on V8 we don't generate any | |
| 732 // code and just return NULL. | |
| 733 // | |
| 734 // Overwrites: G1,G2,G3 | |
| 735 // | |
| 736 address generate_atomic_cmpxchg_long() { | |
| 737 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
| 738 address start = __ pc(); | |
| 739 | |
| 740 if (!VM_Version::supports_cx8()) | |
| 741 return NULL;; | |
| 742 __ sllx(O0, 32, O0); | |
| 743 __ srl(O1, 0, O1); | |
| 744 __ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value | |
| 745 __ sllx(O3, 32, O3); | |
| 746 __ srl(O4, 0, O4); | |
| 747 __ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value | |
| 748 __ casx(O2, O3, O0); | |
| 749 __ srl(O0, 0, O1); // unpacked return value in O1:O0 | |
| 750 __ retl(false); | |
| 751 __ delayed()->srlx(O0, 32, O0); | |
| 752 | |
| 753 return start; | |
| 754 } | |
| 755 | |
| 756 | |
| 757 // Support for jint Atomic::add(jint add_value, volatile jint* dest). | |
| 758 // | |
| 759 // Arguments : | |
| 760 // | |
| 761 // add_value: O0 (e.g., +1 or -1) | |
| 762 // dest: O1 | |
| 763 // | |
| 764 // Results: | |
| 765 // | |
| 766 // O0: the new value stored in dest | |
| 767 // | |
| 768 // Overwrites (v9): O3 | |
| 769 // Overwrites (v8): O3,O4,O5 | |
| 770 // | |
| 771 address generate_atomic_add() { | |
| 772 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
| 773 address start = __ pc(); | |
| 774 __ BIND(_atomic_add_stub); | |
| 775 | |
| 776 if (VM_Version::v9_instructions_work()) { | |
| 777 Label(retry); | |
| 778 __ BIND(retry); | |
| 779 | |
| 780 __ lduw(O1, 0, O2); | |
| 3839 | 781 __ add(O0, O2, O3); |
| 782 __ cas(O1, O2, O3); | |
| 783 __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry); | |
| 0 | 784 __ retl(false); |
| 785 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 | |
| 786 } else { | |
| 787 const Register& lock_reg = O2; | |
| 788 const Register& lock_ptr_reg = O3; | |
| 789 const Register& value_reg = O4; | |
| 790 const Register& yield_reg = O5; | |
| 791 | |
| 792 Label(retry); | |
| 793 Label(dontyield); | |
| 794 | |
| 795 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 796 // got lock, do the increment | |
| 797 __ ld(O1, 0, value_reg); | |
| 798 __ add(O0, value_reg, value_reg); | |
| 799 __ st(value_reg, O1, 0); | |
| 800 | |
| 801 // %%% only for RMO and PSO | |
| 802 __ membar(Assembler::StoreStore); | |
| 803 | |
| 804 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 805 | |
| 806 __ retl(false); | |
| 807 __ delayed()->mov(value_reg, O0); | |
| 808 } | |
| 809 | |
| 810 return start; | |
| 811 } | |
| 812 Label _atomic_add_stub; // called from other stubs | |
| 813 | |
| 814 | |
| 815 //------------------------------------------------------------------------------------------------------------------------ | |
| 816 // The following routine generates a subroutine to throw an asynchronous | |
| 817 // UnknownError when an unsafe access gets a fault that could not be | |
| 818 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
| 819 // | |
| 820 // Arguments : | |
| 821 // | |
| 822 // trapping PC: O7 | |
| 823 // | |
| 824 // Results: | |
| 825 // posts an asynchronous exception, skips the trapping instruction | |
| 826 // | |
| 827 | |
| 828 address generate_handler_for_unsafe_access() { | |
| 829 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
| 830 address start = __ pc(); | |
| 831 | |
| 832 const int preserve_register_words = (64 * 2); | |
| 727 | 833 Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS); |
| 0 | 834 |
| 835 Register Lthread = L7_thread_cache; | |
| 836 int i; | |
| 837 | |
| 838 __ save_frame(0); | |
| 839 __ mov(G1, L1); | |
| 840 __ mov(G2, L2); | |
| 841 __ mov(G3, L3); | |
| 842 __ mov(G4, L4); | |
| 843 __ mov(G5, L5); | |
| 844 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
| 845 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); | |
| 846 } | |
| 847 | |
| 848 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); | |
| 849 BLOCK_COMMENT("call handle_unsafe_access"); | |
| 850 __ call(entry_point, relocInfo::runtime_call_type); | |
| 851 __ delayed()->nop(); | |
| 852 | |
| 853 __ mov(L1, G1); | |
| 854 __ mov(L2, G2); | |
| 855 __ mov(L3, G3); | |
| 856 __ mov(L4, G4); | |
| 857 __ mov(L5, G5); | |
| 858 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
| 859 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); | |
| 860 } | |
| 861 | |
| 862 __ verify_thread(); | |
| 863 | |
| 864 __ jmp(O0, 0); | |
| 865 __ delayed()->restore(); | |
| 866 | |
| 867 return start; | |
| 868 } | |
| 869 | |
| 870 | |
| 871 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); | |
| 872 // Arguments : | |
| 873 // | |
| 874 // ret : O0, returned | |
| 875 // icc/xcc: set as O0 (depending on wordSize) | |
| 876 // sub : O1, argument, not changed | |
| 877 // super: O2, argument, not changed | |
| 878 // raddr: O7, blown by call | |
| 879 address generate_partial_subtype_check() { | |
|
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880 __ align(CodeEntryAlignment); |
| 0 | 881 StubCodeMark mark(this, "StubRoutines", "partial_subtype_check"); |
| 882 address start = __ pc(); | |
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883 Label miss; |
| 0 | 884 |
| 885 #if defined(COMPILER2) && !defined(_LP64) | |
| 886 // Do not use a 'save' because it blows the 64-bit O registers. | |
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887 __ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned) |
| 0 | 888 __ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize); |
| 889 __ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize); | |
| 890 __ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize); | |
| 891 __ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize); | |
| 892 Register Rret = O0; | |
| 893 Register Rsub = O1; | |
| 894 Register Rsuper = O2; | |
| 895 #else | |
| 896 __ save_frame(0); | |
| 897 Register Rret = I0; | |
| 898 Register Rsub = I1; | |
| 899 Register Rsuper = I2; | |
| 900 #endif | |
| 901 | |
| 902 Register L0_ary_len = L0; | |
| 903 Register L1_ary_ptr = L1; | |
| 904 Register L2_super = L2; | |
| 905 Register L3_index = L3; | |
| 906 | |
|
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907 __ check_klass_subtype_slow_path(Rsub, Rsuper, |
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908 L0, L1, L2, L3, |
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909 NULL, &miss); |
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910 |
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911 // Match falls through here. |
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912 __ addcc(G0,0,Rret); // set Z flags, Z result |
| 0 | 913 |
| 914 #if defined(COMPILER2) && !defined(_LP64) | |
| 915 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
| 916 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
| 917 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
| 918 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
| 919 __ retl(); // Result in Rret is zero; flags set to Z | |
| 920 __ delayed()->add(SP,4*wordSize,SP); | |
| 921 #else | |
| 922 __ ret(); // Result in Rret is zero; flags set to Z | |
| 923 __ delayed()->restore(); | |
| 924 #endif | |
| 925 | |
| 926 __ BIND(miss); | |
| 927 __ addcc(G0,1,Rret); // set NZ flags, NZ result | |
| 928 | |
| 929 #if defined(COMPILER2) && !defined(_LP64) | |
| 930 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
| 931 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
| 932 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
| 933 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
| 934 __ retl(); // Result in Rret is != 0; flags set to NZ | |
| 935 __ delayed()->add(SP,4*wordSize,SP); | |
| 936 #else | |
| 937 __ ret(); // Result in Rret is != 0; flags set to NZ | |
| 938 __ delayed()->restore(); | |
| 939 #endif | |
| 940 | |
| 941 return start; | |
| 942 } | |
| 943 | |
| 944 | |
| 945 // Called from MacroAssembler::verify_oop | |
| 946 // | |
| 947 address generate_verify_oop_subroutine() { | |
| 948 StubCodeMark mark(this, "StubRoutines", "verify_oop_stub"); | |
| 949 | |
| 950 address start = __ pc(); | |
| 951 | |
| 952 __ verify_oop_subroutine(); | |
| 953 | |
| 954 return start; | |
| 955 } | |
| 956 | |
| 957 | |
| 958 // | |
| 959 // Verify that a register contains clean 32-bits positive value | |
| 960 // (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax). | |
| 961 // | |
| 962 // Input: | |
| 963 // Rint - 32-bits value | |
| 964 // Rtmp - scratch | |
| 965 // | |
| 966 void assert_clean_int(Register Rint, Register Rtmp) { | |
| 967 #if defined(ASSERT) && defined(_LP64) | |
| 968 __ signx(Rint, Rtmp); | |
| 969 __ cmp(Rint, Rtmp); | |
| 970 __ breakpoint_trap(Assembler::notEqual, Assembler::xcc); | |
| 971 #endif | |
| 972 } | |
| 973 | |
| 974 // | |
| 975 // Generate overlap test for array copy stubs | |
| 976 // | |
| 977 // Input: | |
| 978 // O0 - array1 | |
| 979 // O1 - array2 | |
| 980 // O2 - element count | |
| 981 // | |
| 982 // Kills temps: O3, O4 | |
| 983 // | |
| 984 void array_overlap_test(address no_overlap_target, int log2_elem_size) { | |
| 985 assert(no_overlap_target != NULL, "must be generated"); | |
| 986 array_overlap_test(no_overlap_target, NULL, log2_elem_size); | |
| 987 } | |
| 988 void array_overlap_test(Label& L_no_overlap, int log2_elem_size) { | |
| 989 array_overlap_test(NULL, &L_no_overlap, log2_elem_size); | |
| 990 } | |
| 991 void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) { | |
| 992 const Register from = O0; | |
| 993 const Register to = O1; | |
| 994 const Register count = O2; | |
| 995 const Register to_from = O3; // to - from | |
| 996 const Register byte_count = O4; // count << log2_elem_size | |
| 997 | |
| 998 __ subcc(to, from, to_from); | |
| 999 __ sll_ptr(count, log2_elem_size, byte_count); | |
| 1000 if (NOLp == NULL) | |
| 1001 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target); | |
| 1002 else | |
| 1003 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp)); | |
| 1004 __ delayed()->cmp(to_from, byte_count); | |
| 1005 if (NOLp == NULL) | |
|
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1006 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, no_overlap_target); |
| 0 | 1007 else |
|
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1008 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, (*NOLp)); |
| 0 | 1009 __ delayed()->nop(); |
| 1010 } | |
| 1011 | |
| 1012 // | |
| 1013 // Generate pre-write barrier for array. | |
| 1014 // | |
| 1015 // Input: | |
| 1016 // addr - register containing starting address | |
| 1017 // count - register containing element count | |
| 1018 // tmp - scratch register | |
| 1019 // | |
| 1020 // The input registers are overwritten. | |
| 1021 // | |
| 2324 | 1022 void gen_write_ref_array_pre_barrier(Register addr, Register count, bool dest_uninitialized) { |
| 0 | 1023 BarrierSet* bs = Universe::heap()->barrier_set(); |
| 2324 | 1024 switch (bs->kind()) { |
| 1025 case BarrierSet::G1SATBCT: | |
| 1026 case BarrierSet::G1SATBCTLogging: | |
| 1027 // With G1, don't generate the call if we statically know that the target in uninitialized | |
| 1028 if (!dest_uninitialized) { | |
| 1029 __ save_frame(0); | |
| 1030 // Save the necessary global regs... will be used after. | |
| 1031 if (addr->is_global()) { | |
| 1032 __ mov(addr, L0); | |
| 1033 } | |
| 1034 if (count->is_global()) { | |
| 1035 __ mov(count, L1); | |
| 1036 } | |
| 1037 __ mov(addr->after_save(), O0); | |
| 1038 // Get the count into O1 | |
| 1039 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre)); | |
| 1040 __ delayed()->mov(count->after_save(), O1); | |
| 1041 if (addr->is_global()) { | |
| 1042 __ mov(L0, addr); | |
| 1043 } | |
| 1044 if (count->is_global()) { | |
| 1045 __ mov(L1, count); | |
| 1046 } | |
| 1047 __ restore(); | |
| 1048 } | |
| 1049 break; | |
| 1050 case BarrierSet::CardTableModRef: | |
| 1051 case BarrierSet::CardTableExtension: | |
| 1052 case BarrierSet::ModRef: | |
| 1053 break; | |
| 1054 default: | |
| 1055 ShouldNotReachHere(); | |
| 0 | 1056 } |
| 1057 } | |
| 1058 // | |
| 1059 // Generate post-write barrier for array. | |
| 1060 // | |
| 1061 // Input: | |
| 1062 // addr - register containing starting address | |
| 1063 // count - register containing element count | |
| 1064 // tmp - scratch register | |
| 1065 // | |
| 1066 // The input registers are overwritten. | |
| 1067 // | |
| 1068 void gen_write_ref_array_post_barrier(Register addr, Register count, | |
| 2324 | 1069 Register tmp) { |
| 0 | 1070 BarrierSet* bs = Universe::heap()->barrier_set(); |
| 1071 | |
| 1072 switch (bs->kind()) { | |
| 1073 case BarrierSet::G1SATBCT: | |
| 1074 case BarrierSet::G1SATBCTLogging: | |
| 1075 { | |
| 1076 // Get some new fresh output registers. | |
| 1077 __ save_frame(0); | |
|
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1078 __ mov(addr->after_save(), O0); |
| 0 | 1079 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post)); |
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1080 __ delayed()->mov(count->after_save(), O1); |
| 0 | 1081 __ restore(); |
| 1082 } | |
| 1083 break; | |
| 1084 case BarrierSet::CardTableModRef: | |
| 1085 case BarrierSet::CardTableExtension: | |
| 1086 { | |
| 1087 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
| 1088 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
| 1089 assert_different_registers(addr, count, tmp); | |
| 1090 | |
| 1091 Label L_loop; | |
| 1092 | |
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1093 __ sll_ptr(count, LogBytesPerHeapOop, count); |
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1094 __ sub(count, BytesPerHeapOop, count); |
| 0 | 1095 __ add(count, addr, count); |
| 1096 // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) | |
| 1097 __ srl_ptr(addr, CardTableModRefBS::card_shift, addr); | |
| 1098 __ srl_ptr(count, CardTableModRefBS::card_shift, count); | |
| 1099 __ sub(count, addr, count); | |
| 727 | 1100 AddressLiteral rs(ct->byte_map_base); |
| 1101 __ set(rs, tmp); | |
| 0 | 1102 __ BIND(L_loop); |
| 727 | 1103 __ stb(G0, tmp, addr); |
| 0 | 1104 __ subcc(count, 1, count); |
| 1105 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 1106 __ delayed()->add(addr, 1, addr); | |
| 727 | 1107 } |
| 0 | 1108 break; |
| 1109 case BarrierSet::ModRef: | |
| 1110 break; | |
| 727 | 1111 default: |
| 0 | 1112 ShouldNotReachHere(); |
| 1113 } | |
| 1114 } | |
| 1115 | |
| 3903 | 1116 // |
| 1117 // Generate main code for disjoint arraycopy | |
| 1118 // | |
| 1119 typedef void (StubGenerator::*CopyLoopFunc)(Register from, Register to, Register count, int count_dec, | |
| 1120 Label& L_loop, bool use_prefetch, bool use_bis); | |
| 1121 | |
| 1122 void disjoint_copy_core(Register from, Register to, Register count, int log2_elem_size, | |
| 1123 int iter_size, CopyLoopFunc copy_loop_func) { | |
| 1124 Label L_copy; | |
| 1125 | |
| 1126 assert(log2_elem_size <= 3, "the following code should be changed"); | |
| 1127 int count_dec = 16>>log2_elem_size; | |
| 1128 | |
| 1129 int prefetch_dist = MAX2(ArraycopySrcPrefetchDistance, ArraycopyDstPrefetchDistance); | |
| 1130 assert(prefetch_dist < 4096, "invalid value"); | |
| 1131 prefetch_dist = (prefetch_dist + (iter_size-1)) & (-iter_size); // round up to one iteration copy size | |
| 1132 int prefetch_count = (prefetch_dist >> log2_elem_size); // elements count | |
| 1133 | |
| 1134 if (UseBlockCopy) { | |
| 1135 Label L_block_copy, L_block_copy_prefetch, L_skip_block_copy; | |
| 1136 | |
| 1137 // 64 bytes tail + bytes copied in one loop iteration | |
| 1138 int tail_size = 64 + iter_size; | |
| 1139 int block_copy_count = (MAX2(tail_size, (int)BlockCopyLowLimit)) >> log2_elem_size; | |
| 1140 // Use BIS copy only for big arrays since it requires membar. | |
| 1141 __ set(block_copy_count, O4); | |
| 1142 __ cmp_and_br_short(count, O4, Assembler::lessUnsigned, Assembler::pt, L_skip_block_copy); | |
| 1143 // This code is for disjoint source and destination: | |
| 1144 // to <= from || to >= from+count | |
| 1145 // but BIS will stomp over 'from' if (to > from-tail_size && to <= from) | |
| 1146 __ sub(from, to, O4); | |
| 1147 __ srax(O4, 4, O4); // divide by 16 since following short branch have only 5 bits for imm. | |
| 1148 __ cmp_and_br_short(O4, (tail_size>>4), Assembler::lessEqualUnsigned, Assembler::pn, L_skip_block_copy); | |
| 1149 | |
| 1150 __ wrasi(G0, Assembler::ASI_ST_BLKINIT_PRIMARY); | |
| 1151 // BIS should not be used to copy tail (64 bytes+iter_size) | |
| 1152 // to avoid zeroing of following values. | |
| 1153 __ sub(count, (tail_size>>log2_elem_size), count); // count is still positive >= 0 | |
| 1154 | |
| 1155 if (prefetch_count > 0) { // rounded up to one iteration count | |
| 1156 // Do prefetching only if copy size is bigger | |
| 1157 // than prefetch distance. | |
| 1158 __ set(prefetch_count, O4); | |
| 1159 __ cmp_and_brx_short(count, O4, Assembler::less, Assembler::pt, L_block_copy); | |
| 1160 __ sub(count, prefetch_count, count); | |
| 1161 | |
| 1162 (this->*copy_loop_func)(from, to, count, count_dec, L_block_copy_prefetch, true, true); | |
| 1163 __ add(count, prefetch_count, count); // restore count | |
| 1164 | |
| 1165 } // prefetch_count > 0 | |
| 1166 | |
| 1167 (this->*copy_loop_func)(from, to, count, count_dec, L_block_copy, false, true); | |
| 1168 __ add(count, (tail_size>>log2_elem_size), count); // restore count | |
| 1169 | |
| 1170 __ wrasi(G0, Assembler::ASI_PRIMARY_NOFAULT); | |
| 1171 // BIS needs membar. | |
| 1172 __ membar(Assembler::StoreLoad); | |
| 1173 // Copy tail | |
| 1174 __ ba_short(L_copy); | |
| 1175 | |
| 1176 __ BIND(L_skip_block_copy); | |
| 1177 } // UseBlockCopy | |
| 1178 | |
| 1179 if (prefetch_count > 0) { // rounded up to one iteration count | |
| 1180 // Do prefetching only if copy size is bigger | |
| 1181 // than prefetch distance. | |
| 1182 __ set(prefetch_count, O4); | |
| 1183 __ cmp_and_brx_short(count, O4, Assembler::lessUnsigned, Assembler::pt, L_copy); | |
| 1184 __ sub(count, prefetch_count, count); | |
| 1185 | |
| 1186 Label L_copy_prefetch; | |
| 1187 (this->*copy_loop_func)(from, to, count, count_dec, L_copy_prefetch, true, false); | |
| 1188 __ add(count, prefetch_count, count); // restore count | |
| 1189 | |
| 1190 } // prefetch_count > 0 | |
| 1191 | |
| 1192 (this->*copy_loop_func)(from, to, count, count_dec, L_copy, false, false); | |
| 1193 } | |
| 1194 | |
| 1195 | |
| 1196 | |
| 1197 // | |
| 1198 // Helper methods for copy_16_bytes_forward_with_shift() | |
| 1199 // | |
| 1200 void copy_16_bytes_shift_loop(Register from, Register to, Register count, int count_dec, | |
| 1201 Label& L_loop, bool use_prefetch, bool use_bis) { | |
| 1202 | |
| 1203 const Register left_shift = G1; // left shift bit counter | |
| 1204 const Register right_shift = G5; // right shift bit counter | |
| 1205 | |
| 1206 __ align(OptoLoopAlignment); | |
| 1207 __ BIND(L_loop); | |
| 1208 if (use_prefetch) { | |
| 1209 if (ArraycopySrcPrefetchDistance > 0) { | |
| 1210 __ prefetch(from, ArraycopySrcPrefetchDistance, Assembler::severalReads); | |
| 1211 } | |
| 1212 if (ArraycopyDstPrefetchDistance > 0) { | |
| 1213 __ prefetch(to, ArraycopyDstPrefetchDistance, Assembler::severalWritesAndPossiblyReads); | |
| 1214 } | |
| 1215 } | |
| 1216 __ ldx(from, 0, O4); | |
| 1217 __ ldx(from, 8, G4); | |
| 1218 __ inc(to, 16); | |
| 1219 __ inc(from, 16); | |
| 1220 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
| 1221 __ srlx(O4, right_shift, G3); | |
| 1222 __ bset(G3, O3); | |
| 1223 __ sllx(O4, left_shift, O4); | |
| 1224 __ srlx(G4, right_shift, G3); | |
| 1225 __ bset(G3, O4); | |
| 1226 if (use_bis) { | |
| 1227 __ stxa(O3, to, -16); | |
| 1228 __ stxa(O4, to, -8); | |
| 1229 } else { | |
| 1230 __ stx(O3, to, -16); | |
| 1231 __ stx(O4, to, -8); | |
| 1232 } | |
| 1233 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 1234 __ delayed()->sllx(G4, left_shift, O3); | |
| 1235 } | |
| 0 | 1236 |
| 1237 // Copy big chunks forward with shift | |
| 1238 // | |
| 1239 // Inputs: | |
| 1240 // from - source arrays | |
| 1241 // to - destination array aligned to 8-bytes | |
| 1242 // count - elements count to copy >= the count equivalent to 16 bytes | |
| 1243 // count_dec - elements count's decrement equivalent to 16 bytes | |
| 1244 // L_copy_bytes - copy exit label | |
| 1245 // | |
| 1246 void copy_16_bytes_forward_with_shift(Register from, Register to, | |
| 3903 | 1247 Register count, int log2_elem_size, Label& L_copy_bytes) { |
| 1248 Label L_aligned_copy, L_copy_last_bytes; | |
| 1249 assert(log2_elem_size <= 3, "the following code should be changed"); | |
| 1250 int count_dec = 16>>log2_elem_size; | |
| 0 | 1251 |
| 1252 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
| 3903 | 1253 __ andcc(from, 7, G1); // misaligned bytes |
| 1254 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 1255 __ delayed()->nop(); | |
| 0 | 1256 |
| 1257 const Register left_shift = G1; // left shift bit counter | |
| 1258 const Register right_shift = G5; // right shift bit counter | |
| 1259 | |
| 3903 | 1260 __ sll(G1, LogBitsPerByte, left_shift); |
| 1261 __ mov(64, right_shift); | |
| 1262 __ sub(right_shift, left_shift, right_shift); | |
| 0 | 1263 |
| 1264 // | |
| 1265 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 1266 // to form 2 aligned 8-bytes chunks to store. | |
| 1267 // | |
| 3903 | 1268 __ dec(count, count_dec); // Pre-decrement 'count' |
| 1269 __ andn(from, 7, from); // Align address | |
| 1270 __ ldx(from, 0, O3); | |
| 1271 __ inc(from, 8); | |
| 1272 __ sllx(O3, left_shift, O3); | |
| 1273 | |
| 1274 disjoint_copy_core(from, to, count, log2_elem_size, 16, copy_16_bytes_shift_loop); | |
| 1275 | |
| 1276 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
| 1277 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
| 1278 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
| 1279 | |
| 1280 // copy 8 bytes, part of them already loaded in O3 | |
| 1281 __ ldx(from, 0, O4); | |
| 1282 __ inc(to, 8); | |
| 1283 __ inc(from, 8); | |
| 1284 __ srlx(O4, right_shift, G3); | |
| 1285 __ bset(O3, G3); | |
| 1286 __ stx(G3, to, -8); | |
| 0 | 1287 |
| 1288 __ BIND(L_copy_last_bytes); | |
| 3903 | 1289 __ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes |
| 1290 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
| 1291 __ delayed()->sub(from, right_shift, from); // restore address | |
| 0 | 1292 |
| 1293 __ BIND(L_aligned_copy); | |
| 1294 } | |
| 1295 | |
| 1296 // Copy big chunks backward with shift | |
| 1297 // | |
| 1298 // Inputs: | |
| 1299 // end_from - source arrays end address | |
| 1300 // end_to - destination array end address aligned to 8-bytes | |
| 1301 // count - elements count to copy >= the count equivalent to 16 bytes | |
| 1302 // count_dec - elements count's decrement equivalent to 16 bytes | |
| 1303 // L_aligned_copy - aligned copy exit label | |
| 1304 // L_copy_bytes - copy exit label | |
| 1305 // | |
| 1306 void copy_16_bytes_backward_with_shift(Register end_from, Register end_to, | |
| 1307 Register count, int count_dec, | |
| 1308 Label& L_aligned_copy, Label& L_copy_bytes) { | |
| 1309 Label L_loop, L_copy_last_bytes; | |
| 1310 | |
| 1311 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
| 1312 __ andcc(end_from, 7, G1); // misaligned bytes | |
| 1313 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 1314 __ delayed()->deccc(count, count_dec); // Pre-decrement 'count' | |
| 1315 | |
| 1316 const Register left_shift = G1; // left shift bit counter | |
| 1317 const Register right_shift = G5; // right shift bit counter | |
| 1318 | |
| 1319 __ sll(G1, LogBitsPerByte, left_shift); | |
| 1320 __ mov(64, right_shift); | |
| 1321 __ sub(right_shift, left_shift, right_shift); | |
| 1322 | |
| 1323 // | |
| 1324 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 1325 // to form 2 aligned 8-bytes chunks to store. | |
| 1326 // | |
| 1327 __ andn(end_from, 7, end_from); // Align address | |
| 1328 __ ldx(end_from, 0, O3); | |
| 1365 | 1329 __ align(OptoLoopAlignment); |
| 0 | 1330 __ BIND(L_loop); |
| 1331 __ ldx(end_from, -8, O4); | |
| 1332 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
| 1333 __ ldx(end_from, -16, G4); | |
| 1334 __ dec(end_to, 16); | |
| 1335 __ dec(end_from, 16); | |
| 1336 __ srlx(O3, right_shift, O3); | |
| 1337 __ sllx(O4, left_shift, G3); | |
| 1338 __ bset(G3, O3); | |
| 1339 __ stx(O3, end_to, 8); | |
| 1340 __ srlx(O4, right_shift, O4); | |
| 1341 __ sllx(G4, left_shift, G3); | |
| 1342 __ bset(G3, O4); | |
| 1343 __ stx(O4, end_to, 0); | |
| 1344 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 1345 __ delayed()->mov(G4, O3); | |
| 1346 | |
| 1347 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
| 1348 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
| 1349 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
| 1350 | |
| 1351 // copy 8 bytes, part of them already loaded in O3 | |
| 1352 __ ldx(end_from, -8, O4); | |
| 1353 __ dec(end_to, 8); | |
| 1354 __ dec(end_from, 8); | |
| 1355 __ srlx(O3, right_shift, O3); | |
| 1356 __ sllx(O4, left_shift, G3); | |
| 1357 __ bset(O3, G3); | |
| 1358 __ stx(G3, end_to, 0); | |
| 1359 | |
| 1360 __ BIND(L_copy_last_bytes); | |
| 1361 __ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes | |
| 1362 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
| 1363 __ delayed()->add(end_from, left_shift, end_from); // restore address | |
| 1364 } | |
| 1365 | |
| 1366 // | |
| 1367 // Generate stub for disjoint byte copy. If "aligned" is true, the | |
| 1368 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1369 // | |
| 1370 // Arguments for generated stub: | |
| 1371 // from: O0 | |
| 1372 // to: O1 | |
| 1373 // count: O2 treated as signed | |
| 1374 // | |
|
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1375 address generate_disjoint_byte_copy(bool aligned, address *entry, const char *name) { |
| 0 | 1376 __ align(CodeEntryAlignment); |
| 1377 StubCodeMark mark(this, "StubRoutines", name); | |
| 1378 address start = __ pc(); | |
| 1379 | |
| 1380 Label L_skip_alignment, L_align; | |
| 1381 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
| 1382 | |
| 1383 const Register from = O0; // source array address | |
| 1384 const Register to = O1; // destination array address | |
| 1385 const Register count = O2; // elements count | |
| 1386 const Register offset = O5; // offset from start of arrays | |
| 1387 // O3, O4, G3, G4 are used as temp registers | |
| 1388 | |
| 1389 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1390 | |
|
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1391 if (entry != NULL) { |
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1392 *entry = __ pc(); |
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1393 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1394 BLOCK_COMMENT("Entry:"); |
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1395 } |
| 0 | 1396 |
| 1397 // for short arrays, just do single element copy | |
| 1398 __ cmp(count, 23); // 16 + 7 | |
| 1399 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
| 1400 __ delayed()->mov(G0, offset); | |
| 1401 | |
| 1402 if (aligned) { | |
| 1403 // 'aligned' == true when it is known statically during compilation | |
| 1404 // of this arraycopy call site that both 'from' and 'to' addresses | |
| 1405 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
| 1406 // | |
| 1407 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
| 1408 // and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM | |
| 1409 // | |
| 1410 #ifndef _LP64 | |
| 1411 // copy a 4-bytes word if necessary to align 'to' to 8 bytes | |
| 1412 __ andcc(to, 7, G0); | |
| 1413 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment); | |
| 1414 __ delayed()->ld(from, 0, O3); | |
| 1415 __ inc(from, 4); | |
| 1416 __ inc(to, 4); | |
| 1417 __ dec(count, 4); | |
| 1418 __ st(O3, to, -4); | |
| 1419 __ BIND(L_skip_alignment); | |
| 1420 #endif | |
| 1421 } else { | |
| 1422 // copy bytes to align 'to' on 8 byte boundary | |
| 1423 __ andcc(to, 7, G1); // misaligned bytes | |
| 1424 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1425 __ delayed()->neg(G1); | |
| 1426 __ inc(G1, 8); // bytes need to copy to next 8-bytes alignment | |
| 1427 __ sub(count, G1, count); | |
| 1428 __ BIND(L_align); | |
| 1429 __ ldub(from, 0, O3); | |
| 1430 __ deccc(G1); | |
| 1431 __ inc(from); | |
| 1432 __ stb(O3, to, 0); | |
| 1433 __ br(Assembler::notZero, false, Assembler::pt, L_align); | |
| 1434 __ delayed()->inc(to); | |
| 1435 __ BIND(L_skip_alignment); | |
| 1436 } | |
| 1437 #ifdef _LP64 | |
| 1438 if (!aligned) | |
| 1439 #endif | |
| 1440 { | |
| 1441 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1442 // the same alignment mod 8, otherwise fall through to the next | |
| 1443 // code for aligned copy. | |
| 1444 // The compare above (count >= 23) guarantes 'count' >= 16 bytes. | |
| 1445 // Also jump over aligned copy after the copy with shift completed. | |
| 1446 | |
| 3903 | 1447 copy_16_bytes_forward_with_shift(from, to, count, 0, L_copy_byte); |
| 0 | 1448 } |
| 1449 | |
| 1450 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
| 1451 __ and3(count, 7, G4); // Save count | |
| 1452 __ srl(count, 3, count); | |
| 1453 generate_disjoint_long_copy_core(aligned); | |
| 1454 __ mov(G4, count); // Restore count | |
| 1455 | |
| 1456 // copy tailing bytes | |
| 1457 __ BIND(L_copy_byte); | |
| 3839 | 1458 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
| 1365 | 1459 __ align(OptoLoopAlignment); |
| 0 | 1460 __ BIND(L_copy_byte_loop); |
| 1461 __ ldub(from, offset, O3); | |
| 1462 __ deccc(count); | |
| 1463 __ stb(O3, to, offset); | |
| 1464 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop); | |
| 1465 __ delayed()->inc(offset); | |
| 1466 | |
| 1467 __ BIND(L_exit); | |
| 1468 // O3, O4 are used as temp registers | |
| 1469 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
| 1470 __ retl(); | |
| 1471 __ delayed()->mov(G0, O0); // return 0 | |
| 1472 return start; | |
| 1473 } | |
| 1474 | |
| 1475 // | |
| 1476 // Generate stub for conjoint byte copy. If "aligned" is true, the | |
| 1477 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1478 // | |
| 1479 // Arguments for generated stub: | |
| 1480 // from: O0 | |
| 1481 // to: O1 | |
| 1482 // count: O2 treated as signed | |
| 1483 // | |
|
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1484 address generate_conjoint_byte_copy(bool aligned, address nooverlap_target, |
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1485 address *entry, const char *name) { |
| 0 | 1486 // Do reverse copy. |
| 1487 | |
| 1488 __ align(CodeEntryAlignment); | |
| 1489 StubCodeMark mark(this, "StubRoutines", name); | |
| 1490 address start = __ pc(); | |
| 1491 | |
| 1492 Label L_skip_alignment, L_align, L_aligned_copy; | |
| 1493 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
| 1494 | |
| 1495 const Register from = O0; // source array address | |
| 1496 const Register to = O1; // destination array address | |
| 1497 const Register count = O2; // elements count | |
| 1498 const Register end_from = from; // source array end address | |
| 1499 const Register end_to = to; // destination array end address | |
| 1500 | |
| 1501 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1502 | |
|
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1503 if (entry != NULL) { |
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1504 *entry = __ pc(); |
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1505 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1506 BLOCK_COMMENT("Entry:"); |
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1507 } |
| 0 | 1508 |
| 1509 array_overlap_test(nooverlap_target, 0); | |
| 1510 | |
| 1511 __ add(to, count, end_to); // offset after last copied element | |
| 1512 | |
| 1513 // for short arrays, just do single element copy | |
| 1514 __ cmp(count, 23); // 16 + 7 | |
| 1515 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
| 1516 __ delayed()->add(from, count, end_from); | |
| 1517 | |
| 1518 { | |
| 1519 // Align end of arrays since they could be not aligned even | |
| 1520 // when arrays itself are aligned. | |
| 1521 | |
| 1522 // copy bytes to align 'end_to' on 8 byte boundary | |
| 1523 __ andcc(end_to, 7, G1); // misaligned bytes | |
| 1524 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1525 __ delayed()->nop(); | |
| 1526 __ sub(count, G1, count); | |
| 1527 __ BIND(L_align); | |
| 1528 __ dec(end_from); | |
| 1529 __ dec(end_to); | |
| 1530 __ ldub(end_from, 0, O3); | |
| 1531 __ deccc(G1); | |
| 1532 __ brx(Assembler::notZero, false, Assembler::pt, L_align); | |
| 1533 __ delayed()->stb(O3, end_to, 0); | |
| 1534 __ BIND(L_skip_alignment); | |
| 1535 } | |
| 1536 #ifdef _LP64 | |
| 1537 if (aligned) { | |
| 1538 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
| 1539 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
| 1540 // in unaligned case. | |
| 1541 __ dec(count, 16); | |
| 1542 } else | |
| 1543 #endif | |
| 1544 { | |
| 1545 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1546 // the same alignment mod 8, otherwise jump to the next | |
| 1547 // code for aligned copy (and substracting 16 from 'count' before jump). | |
| 1548 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
| 1549 // Also jump over aligned copy after the copy with shift completed. | |
| 1550 | |
| 1551 copy_16_bytes_backward_with_shift(end_from, end_to, count, 16, | |
| 1552 L_aligned_copy, L_copy_byte); | |
| 1553 } | |
| 1554 // copy 4 elements (16 bytes) at a time | |
| 1365 | 1555 __ align(OptoLoopAlignment); |
| 0 | 1556 __ BIND(L_aligned_copy); |
| 1557 __ dec(end_from, 16); | |
| 1558 __ ldx(end_from, 8, O3); | |
| 1559 __ ldx(end_from, 0, O4); | |
| 1560 __ dec(end_to, 16); | |
| 1561 __ deccc(count, 16); | |
| 1562 __ stx(O3, end_to, 8); | |
| 1563 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
| 1564 __ delayed()->stx(O4, end_to, 0); | |
| 1565 __ inc(count, 16); | |
| 1566 | |
| 1567 // copy 1 element (2 bytes) at a time | |
| 1568 __ BIND(L_copy_byte); | |
| 3839 | 1569 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
| 1365 | 1570 __ align(OptoLoopAlignment); |
| 0 | 1571 __ BIND(L_copy_byte_loop); |
| 1572 __ dec(end_from); | |
| 1573 __ dec(end_to); | |
| 1574 __ ldub(end_from, 0, O4); | |
| 1575 __ deccc(count); | |
| 1576 __ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop); | |
| 1577 __ delayed()->stb(O4, end_to, 0); | |
| 1578 | |
| 1579 __ BIND(L_exit); | |
| 1580 // O3, O4 are used as temp registers | |
| 1581 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
| 1582 __ retl(); | |
| 1583 __ delayed()->mov(G0, O0); // return 0 | |
| 1584 return start; | |
| 1585 } | |
| 1586 | |
| 1587 // | |
| 1588 // Generate stub for disjoint short copy. If "aligned" is true, the | |
| 1589 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1590 // | |
| 1591 // Arguments for generated stub: | |
| 1592 // from: O0 | |
| 1593 // to: O1 | |
| 1594 // count: O2 treated as signed | |
| 1595 // | |
|
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1596 address generate_disjoint_short_copy(bool aligned, address *entry, const char * name) { |
| 0 | 1597 __ align(CodeEntryAlignment); |
| 1598 StubCodeMark mark(this, "StubRoutines", name); | |
| 1599 address start = __ pc(); | |
| 1600 | |
| 1601 Label L_skip_alignment, L_skip_alignment2; | |
| 1602 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
| 1603 | |
| 1604 const Register from = O0; // source array address | |
| 1605 const Register to = O1; // destination array address | |
| 1606 const Register count = O2; // elements count | |
| 1607 const Register offset = O5; // offset from start of arrays | |
| 1608 // O3, O4, G3, G4 are used as temp registers | |
| 1609 | |
| 1610 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1611 | |
|
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1612 if (entry != NULL) { |
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1613 *entry = __ pc(); |
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1614 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1615 BLOCK_COMMENT("Entry:"); |
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1616 } |
| 0 | 1617 |
| 1618 // for short arrays, just do single element copy | |
| 1619 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
| 1620 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
| 1621 __ delayed()->mov(G0, offset); | |
| 1622 | |
| 1623 if (aligned) { | |
| 1624 // 'aligned' == true when it is known statically during compilation | |
| 1625 // of this arraycopy call site that both 'from' and 'to' addresses | |
| 1626 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
| 1627 // | |
| 1628 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
| 1629 // and 8 bytes - in 64-bits VM. | |
| 1630 // | |
| 1631 #ifndef _LP64 | |
| 1632 // copy a 2-elements word if necessary to align 'to' to 8 bytes | |
| 1633 __ andcc(to, 7, G0); | |
| 1634 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1635 __ delayed()->ld(from, 0, O3); | |
| 1636 __ inc(from, 4); | |
| 1637 __ inc(to, 4); | |
| 1638 __ dec(count, 2); | |
| 1639 __ st(O3, to, -4); | |
| 1640 __ BIND(L_skip_alignment); | |
| 1641 #endif | |
| 1642 } else { | |
| 1643 // copy 1 element if necessary to align 'to' on an 4 bytes | |
| 1644 __ andcc(to, 3, G0); | |
| 1645 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1646 __ delayed()->lduh(from, 0, O3); | |
| 1647 __ inc(from, 2); | |
| 1648 __ inc(to, 2); | |
| 1649 __ dec(count); | |
| 1650 __ sth(O3, to, -2); | |
| 1651 __ BIND(L_skip_alignment); | |
| 1652 | |
| 1653 // copy 2 elements to align 'to' on an 8 byte boundary | |
| 1654 __ andcc(to, 7, G0); | |
| 1655 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
| 1656 __ delayed()->lduh(from, 0, O3); | |
| 1657 __ dec(count, 2); | |
| 1658 __ lduh(from, 2, O4); | |
| 1659 __ inc(from, 4); | |
| 1660 __ inc(to, 4); | |
| 1661 __ sth(O3, to, -4); | |
| 1662 __ sth(O4, to, -2); | |
| 1663 __ BIND(L_skip_alignment2); | |
| 1664 } | |
| 1665 #ifdef _LP64 | |
| 1666 if (!aligned) | |
| 1667 #endif | |
| 1668 { | |
| 1669 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1670 // the same alignment mod 8, otherwise fall through to the next | |
| 1671 // code for aligned copy. | |
| 1672 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
| 1673 // Also jump over aligned copy after the copy with shift completed. | |
| 1674 | |
| 3903 | 1675 copy_16_bytes_forward_with_shift(from, to, count, 1, L_copy_2_bytes); |
| 0 | 1676 } |
| 1677 | |
| 1678 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
| 1679 __ and3(count, 3, G4); // Save | |
| 1680 __ srl(count, 2, count); | |
| 1681 generate_disjoint_long_copy_core(aligned); | |
| 1682 __ mov(G4, count); // restore | |
| 1683 | |
| 1684 // copy 1 element at a time | |
| 1685 __ BIND(L_copy_2_bytes); | |
| 3839 | 1686 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
| 1365 | 1687 __ align(OptoLoopAlignment); |
| 0 | 1688 __ BIND(L_copy_2_bytes_loop); |
| 1689 __ lduh(from, offset, O3); | |
| 1690 __ deccc(count); | |
| 1691 __ sth(O3, to, offset); | |
| 1692 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop); | |
| 1693 __ delayed()->inc(offset, 2); | |
| 1694 | |
| 1695 __ BIND(L_exit); | |
| 1696 // O3, O4 are used as temp registers | |
| 1697 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
| 1698 __ retl(); | |
| 1699 __ delayed()->mov(G0, O0); // return 0 | |
| 1700 return start; | |
| 1701 } | |
| 1702 | |
| 1703 // | |
| 1763 | 1704 // Generate stub for disjoint short fill. If "aligned" is true, the |
| 1705 // "to" address is assumed to be heapword aligned. | |
| 1706 // | |
| 1707 // Arguments for generated stub: | |
| 1708 // to: O0 | |
| 1709 // value: O1 | |
| 1710 // count: O2 treated as signed | |
| 1711 // | |
| 1712 address generate_fill(BasicType t, bool aligned, const char* name) { | |
| 1713 __ align(CodeEntryAlignment); | |
| 1714 StubCodeMark mark(this, "StubRoutines", name); | |
| 1715 address start = __ pc(); | |
| 1716 | |
| 1717 const Register to = O0; // source array address | |
| 1718 const Register value = O1; // fill value | |
| 1719 const Register count = O2; // elements count | |
| 1720 // O3 is used as a temp register | |
| 1721 | |
| 1722 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1723 | |
| 1724 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
| 1794 | 1725 Label L_fill_2_bytes, L_fill_elements, L_fill_32_bytes; |
| 1763 | 1726 |
| 1727 int shift = -1; | |
| 1728 switch (t) { | |
| 1729 case T_BYTE: | |
| 1730 shift = 2; | |
| 1731 break; | |
| 1732 case T_SHORT: | |
| 1733 shift = 1; | |
| 1734 break; | |
| 1735 case T_INT: | |
| 1736 shift = 0; | |
| 1737 break; | |
| 1738 default: ShouldNotReachHere(); | |
| 1739 } | |
| 1740 | |
| 1741 BLOCK_COMMENT("Entry:"); | |
| 1742 | |
| 1743 if (t == T_BYTE) { | |
| 1744 // Zero extend value | |
| 1745 __ and3(value, 0xff, value); | |
| 1746 __ sllx(value, 8, O3); | |
| 1747 __ or3(value, O3, value); | |
| 1748 } | |
| 1749 if (t == T_SHORT) { | |
| 1750 // Zero extend value | |
| 1794 | 1751 __ sllx(value, 48, value); |
| 1752 __ srlx(value, 48, value); | |
| 1763 | 1753 } |
| 1754 if (t == T_BYTE || t == T_SHORT) { | |
| 1755 __ sllx(value, 16, O3); | |
| 1756 __ or3(value, O3, value); | |
| 1757 } | |
| 1758 | |
| 1759 __ cmp(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
| 1794 | 1760 __ brx(Assembler::lessUnsigned, false, Assembler::pn, L_fill_elements); // use unsigned cmp |
| 1761 __ delayed()->andcc(count, 1, G0); | |
| 1763 | 1762 |
| 1763 if (!aligned && (t == T_BYTE || t == T_SHORT)) { | |
| 1764 // align source address at 4 bytes address boundary | |
| 1765 if (t == T_BYTE) { | |
| 1766 // One byte misalignment happens only for byte arrays | |
| 1767 __ andcc(to, 1, G0); | |
| 1768 __ br(Assembler::zero, false, Assembler::pt, L_skip_align1); | |
| 1769 __ delayed()->nop(); | |
| 1770 __ stb(value, to, 0); | |
| 1771 __ inc(to, 1); | |
| 1772 __ dec(count, 1); | |
| 1773 __ BIND(L_skip_align1); | |
| 1774 } | |
| 1775 // Two bytes misalignment happens only for byte and short (char) arrays | |
| 1776 __ andcc(to, 2, G0); | |
| 1777 __ br(Assembler::zero, false, Assembler::pt, L_skip_align2); | |
| 1778 __ delayed()->nop(); | |
| 1779 __ sth(value, to, 0); | |
| 1780 __ inc(to, 2); | |
| 1781 __ dec(count, 1 << (shift - 1)); | |
| 1782 __ BIND(L_skip_align2); | |
| 1783 } | |
| 1784 #ifdef _LP64 | |
| 1785 if (!aligned) { | |
| 1786 #endif | |
| 1787 // align to 8 bytes, we know we are 4 byte aligned to start | |
| 1788 __ andcc(to, 7, G0); | |
| 1789 __ br(Assembler::zero, false, Assembler::pt, L_fill_32_bytes); | |
| 1790 __ delayed()->nop(); | |
| 1791 __ stw(value, to, 0); | |
| 1792 __ inc(to, 4); | |
| 1793 __ dec(count, 1 << shift); | |
| 1794 __ BIND(L_fill_32_bytes); | |
| 1795 #ifdef _LP64 | |
| 1796 } | |
| 1797 #endif | |
| 1798 | |
| 1799 if (t == T_INT) { | |
| 1800 // Zero extend value | |
| 1801 __ srl(value, 0, value); | |
| 1802 } | |
| 1803 if (t == T_BYTE || t == T_SHORT || t == T_INT) { | |
| 1804 __ sllx(value, 32, O3); | |
| 1805 __ or3(value, O3, value); | |
| 1806 } | |
| 1807 | |
| 1782 | 1808 Label L_check_fill_8_bytes; |
| 1809 // Fill 32-byte chunks | |
| 1810 __ subcc(count, 8 << shift, count); | |
| 1811 __ brx(Assembler::less, false, Assembler::pt, L_check_fill_8_bytes); | |
| 1812 __ delayed()->nop(); | |
| 1813 | |
| 1794 | 1814 Label L_fill_32_bytes_loop, L_fill_4_bytes; |
| 1763 | 1815 __ align(16); |
| 1816 __ BIND(L_fill_32_bytes_loop); | |
| 1817 | |
| 1818 __ stx(value, to, 0); | |
| 1819 __ stx(value, to, 8); | |
| 1820 __ stx(value, to, 16); | |
| 1821 __ stx(value, to, 24); | |
| 1822 | |
| 1823 __ subcc(count, 8 << shift, count); | |
| 1824 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_fill_32_bytes_loop); | |
| 1825 __ delayed()->add(to, 32, to); | |
| 1826 | |
| 1827 __ BIND(L_check_fill_8_bytes); | |
| 1828 __ addcc(count, 8 << shift, count); | |
| 1829 __ brx(Assembler::zero, false, Assembler::pn, L_exit); | |
| 1830 __ delayed()->subcc(count, 1 << (shift + 1), count); | |
| 1831 __ brx(Assembler::less, false, Assembler::pn, L_fill_4_bytes); | |
| 1832 __ delayed()->andcc(count, 1<<shift, G0); | |
| 1833 | |
| 1834 // | |
| 1835 // length is too short, just fill 8 bytes at a time | |
| 1836 // | |
| 1837 Label L_fill_8_bytes_loop; | |
| 1838 __ BIND(L_fill_8_bytes_loop); | |
| 1839 __ stx(value, to, 0); | |
| 1840 __ subcc(count, 1 << (shift + 1), count); | |
| 1841 __ brx(Assembler::greaterEqual, false, Assembler::pn, L_fill_8_bytes_loop); | |
| 1842 __ delayed()->add(to, 8, to); | |
| 1843 | |
| 1844 // fill trailing 4 bytes | |
| 1845 __ andcc(count, 1<<shift, G0); // in delay slot of branches | |
| 1794 | 1846 if (t == T_INT) { |
| 1847 __ BIND(L_fill_elements); | |
| 1848 } | |
| 1763 | 1849 __ BIND(L_fill_4_bytes); |
| 1850 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2_bytes); | |
| 1851 if (t == T_BYTE || t == T_SHORT) { | |
| 1852 __ delayed()->andcc(count, 1<<(shift-1), G0); | |
| 1853 } else { | |
| 1854 __ delayed()->nop(); | |
| 1855 } | |
| 1856 __ stw(value, to, 0); | |
| 1857 if (t == T_BYTE || t == T_SHORT) { | |
| 1858 __ inc(to, 4); | |
| 1859 // fill trailing 2 bytes | |
| 1860 __ andcc(count, 1<<(shift-1), G0); // in delay slot of branches | |
| 1861 __ BIND(L_fill_2_bytes); | |
| 1862 __ brx(Assembler::zero, false, Assembler::pt, L_fill_byte); | |
| 1863 __ delayed()->andcc(count, 1, count); | |
| 1864 __ sth(value, to, 0); | |
| 1865 if (t == T_BYTE) { | |
| 1866 __ inc(to, 2); | |
| 1867 // fill trailing byte | |
| 1868 __ andcc(count, 1, count); // in delay slot of branches | |
| 1869 __ BIND(L_fill_byte); | |
| 1870 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
| 1871 __ delayed()->nop(); | |
| 1872 __ stb(value, to, 0); | |
| 1873 } else { | |
| 1874 __ BIND(L_fill_byte); | |
| 1875 } | |
| 1876 } else { | |
| 1877 __ BIND(L_fill_2_bytes); | |
| 1878 } | |
| 1879 __ BIND(L_exit); | |
| 1880 __ retl(); | |
| 1794 | 1881 __ delayed()->nop(); |
| 1882 | |
| 1883 // Handle copies less than 8 bytes. Int is handled elsewhere. | |
| 1884 if (t == T_BYTE) { | |
| 1885 __ BIND(L_fill_elements); | |
| 1886 Label L_fill_2, L_fill_4; | |
| 1887 // in delay slot __ andcc(count, 1, G0); | |
| 1888 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
| 1889 __ delayed()->andcc(count, 2, G0); | |
| 1890 __ stb(value, to, 0); | |
| 1891 __ inc(to, 1); | |
| 1892 __ BIND(L_fill_2); | |
| 1893 __ brx(Assembler::zero, false, Assembler::pt, L_fill_4); | |
| 1894 __ delayed()->andcc(count, 4, G0); | |
| 1895 __ stb(value, to, 0); | |
| 1896 __ stb(value, to, 1); | |
| 1897 __ inc(to, 2); | |
| 1898 __ BIND(L_fill_4); | |
| 1899 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
| 1900 __ delayed()->nop(); | |
| 1901 __ stb(value, to, 0); | |
| 1902 __ stb(value, to, 1); | |
| 1903 __ stb(value, to, 2); | |
| 1904 __ retl(); | |
| 1905 __ delayed()->stb(value, to, 3); | |
| 1906 } | |
| 1907 | |
| 1908 if (t == T_SHORT) { | |
| 1909 Label L_fill_2; | |
| 1910 __ BIND(L_fill_elements); | |
| 1911 // in delay slot __ andcc(count, 1, G0); | |
| 1912 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
| 1913 __ delayed()->andcc(count, 2, G0); | |
| 1914 __ sth(value, to, 0); | |
| 1915 __ inc(to, 2); | |
| 1916 __ BIND(L_fill_2); | |
| 1917 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
| 1918 __ delayed()->nop(); | |
| 1919 __ sth(value, to, 0); | |
| 1920 __ retl(); | |
| 1921 __ delayed()->sth(value, to, 2); | |
| 1922 } | |
| 1763 | 1923 return start; |
| 1924 } | |
| 1925 | |
| 1926 // | |
| 0 | 1927 // Generate stub for conjoint short copy. If "aligned" is true, the |
| 1928 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1929 // | |
| 1930 // Arguments for generated stub: | |
| 1931 // from: O0 | |
| 1932 // to: O1 | |
| 1933 // count: O2 treated as signed | |
| 1934 // | |
|
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1935 address generate_conjoint_short_copy(bool aligned, address nooverlap_target, |
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1936 address *entry, const char *name) { |
| 0 | 1937 // Do reverse copy. |
| 1938 | |
| 1939 __ align(CodeEntryAlignment); | |
| 1940 StubCodeMark mark(this, "StubRoutines", name); | |
| 1941 address start = __ pc(); | |
| 1942 | |
| 1943 Label L_skip_alignment, L_skip_alignment2, L_aligned_copy; | |
| 1944 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
| 1945 | |
| 1946 const Register from = O0; // source array address | |
| 1947 const Register to = O1; // destination array address | |
| 1948 const Register count = O2; // elements count | |
| 1949 const Register end_from = from; // source array end address | |
| 1950 const Register end_to = to; // destination array end address | |
| 1951 | |
| 1952 const Register byte_count = O3; // bytes count to copy | |
| 1953 | |
| 1954 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1955 | |
|
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1956 if (entry != NULL) { |
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1957 *entry = __ pc(); |
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1958 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1959 BLOCK_COMMENT("Entry:"); |
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1960 } |
| 0 | 1961 |
| 1962 array_overlap_test(nooverlap_target, 1); | |
| 1963 | |
| 1964 __ sllx(count, LogBytesPerShort, byte_count); | |
| 1965 __ add(to, byte_count, end_to); // offset after last copied element | |
| 1966 | |
| 1967 // for short arrays, just do single element copy | |
| 1968 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
| 1969 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
| 1970 __ delayed()->add(from, byte_count, end_from); | |
| 1971 | |
| 1972 { | |
| 1973 // Align end of arrays since they could be not aligned even | |
| 1974 // when arrays itself are aligned. | |
| 1975 | |
| 1976 // copy 1 element if necessary to align 'end_to' on an 4 bytes | |
| 1977 __ andcc(end_to, 3, G0); | |
| 1978 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1979 __ delayed()->lduh(end_from, -2, O3); | |
| 1980 __ dec(end_from, 2); | |
| 1981 __ dec(end_to, 2); | |
| 1982 __ dec(count); | |
| 1983 __ sth(O3, end_to, 0); | |
| 1984 __ BIND(L_skip_alignment); | |
| 1985 | |
| 1986 // copy 2 elements to align 'end_to' on an 8 byte boundary | |
| 1987 __ andcc(end_to, 7, G0); | |
| 1988 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
| 1989 __ delayed()->lduh(end_from, -2, O3); | |
| 1990 __ dec(count, 2); | |
| 1991 __ lduh(end_from, -4, O4); | |
| 1992 __ dec(end_from, 4); | |
| 1993 __ dec(end_to, 4); | |
| 1994 __ sth(O3, end_to, 2); | |
| 1995 __ sth(O4, end_to, 0); | |
| 1996 __ BIND(L_skip_alignment2); | |
| 1997 } | |
| 1998 #ifdef _LP64 | |
| 1999 if (aligned) { | |
| 2000 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
| 2001 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
| 2002 // in unaligned case. | |
| 2003 __ dec(count, 8); | |
| 2004 } else | |
| 2005 #endif | |
| 2006 { | |
| 2007 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 2008 // the same alignment mod 8, otherwise jump to the next | |
| 2009 // code for aligned copy (and substracting 8 from 'count' before jump). | |
| 2010 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
| 2011 // Also jump over aligned copy after the copy with shift completed. | |
| 2012 | |
| 2013 copy_16_bytes_backward_with_shift(end_from, end_to, count, 8, | |
| 2014 L_aligned_copy, L_copy_2_bytes); | |
| 2015 } | |
| 2016 // copy 4 elements (16 bytes) at a time | |
| 1365 | 2017 __ align(OptoLoopAlignment); |
| 0 | 2018 __ BIND(L_aligned_copy); |
| 2019 __ dec(end_from, 16); | |
| 2020 __ ldx(end_from, 8, O3); | |
| 2021 __ ldx(end_from, 0, O4); | |
| 2022 __ dec(end_to, 16); | |
| 2023 __ deccc(count, 8); | |
| 2024 __ stx(O3, end_to, 8); | |
| 2025 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
| 2026 __ delayed()->stx(O4, end_to, 0); | |
| 2027 __ inc(count, 8); | |
| 2028 | |
| 2029 // copy 1 element (2 bytes) at a time | |
| 2030 __ BIND(L_copy_2_bytes); | |
| 3839 | 2031 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
| 0 | 2032 __ BIND(L_copy_2_bytes_loop); |
| 2033 __ dec(end_from, 2); | |
| 2034 __ dec(end_to, 2); | |
| 2035 __ lduh(end_from, 0, O4); | |
| 2036 __ deccc(count); | |
| 2037 __ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop); | |
| 2038 __ delayed()->sth(O4, end_to, 0); | |
| 2039 | |
| 2040 __ BIND(L_exit); | |
| 2041 // O3, O4 are used as temp registers | |
| 2042 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
| 2043 __ retl(); | |
| 2044 __ delayed()->mov(G0, O0); // return 0 | |
| 2045 return start; | |
| 2046 } | |
| 2047 | |
| 2048 // | |
| 3903 | 2049 // Helper methods for generate_disjoint_int_copy_core() |
| 2050 // | |
| 2051 void copy_16_bytes_loop(Register from, Register to, Register count, int count_dec, | |
| 2052 Label& L_loop, bool use_prefetch, bool use_bis) { | |
| 2053 | |
| 2054 __ align(OptoLoopAlignment); | |
| 2055 __ BIND(L_loop); | |
| 2056 if (use_prefetch) { | |
| 2057 if (ArraycopySrcPrefetchDistance > 0) { | |
| 2058 __ prefetch(from, ArraycopySrcPrefetchDistance, Assembler::severalReads); | |
| 2059 } | |
| 2060 if (ArraycopyDstPrefetchDistance > 0) { | |
| 2061 __ prefetch(to, ArraycopyDstPrefetchDistance, Assembler::severalWritesAndPossiblyReads); | |
| 2062 } | |
| 2063 } | |
| 2064 __ ldx(from, 4, O4); | |
| 2065 __ ldx(from, 12, G4); | |
| 2066 __ inc(to, 16); | |
| 2067 __ inc(from, 16); | |
| 2068 __ deccc(count, 4); // Can we do next iteration after this one? | |
| 2069 | |
| 2070 __ srlx(O4, 32, G3); | |
| 2071 __ bset(G3, O3); | |
| 2072 __ sllx(O4, 32, O4); | |
| 2073 __ srlx(G4, 32, G3); | |
| 2074 __ bset(G3, O4); | |
| 2075 if (use_bis) { | |
| 2076 __ stxa(O3, to, -16); | |
| 2077 __ stxa(O4, to, -8); | |
| 2078 } else { | |
| 2079 __ stx(O3, to, -16); | |
| 2080 __ stx(O4, to, -8); | |
| 2081 } | |
| 2082 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 2083 __ delayed()->sllx(G4, 32, O3); | |
| 2084 | |
| 2085 } | |
| 2086 | |
| 2087 // | |
| 0 | 2088 // Generate core code for disjoint int copy (and oop copy on 32-bit). |
| 2089 // If "aligned" is true, the "from" and "to" addresses are assumed | |
| 2090 // to be heapword aligned. | |
| 2091 // | |
| 2092 // Arguments: | |
| 2093 // from: O0 | |
| 2094 // to: O1 | |
| 2095 // count: O2 treated as signed | |
| 2096 // | |
| 2097 void generate_disjoint_int_copy_core(bool aligned) { | |
| 2098 | |
| 2099 Label L_skip_alignment, L_aligned_copy; | |
| 3903 | 2100 Label L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; |
| 0 | 2101 |
| 2102 const Register from = O0; // source array address | |
| 2103 const Register to = O1; // destination array address | |
| 2104 const Register count = O2; // elements count | |
| 2105 const Register offset = O5; // offset from start of arrays | |
| 2106 // O3, O4, G3, G4 are used as temp registers | |
| 2107 | |
| 2108 // 'aligned' == true when it is known statically during compilation | |
| 2109 // of this arraycopy call site that both 'from' and 'to' addresses | |
| 2110 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
| 2111 // | |
| 2112 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
| 2113 // and 8 bytes - in 64-bits VM. | |
| 2114 // | |
| 2115 #ifdef _LP64 | |
| 2116 if (!aligned) | |
| 2117 #endif | |
| 2118 { | |
| 2119 // The next check could be put under 'ifndef' since the code in | |
| 2120 // generate_disjoint_long_copy_core() has own checks and set 'offset'. | |
| 2121 | |
| 2122 // for short arrays, just do single element copy | |
| 2123 __ cmp(count, 5); // 4 + 1 (20 bytes) | |
| 2124 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
| 2125 __ delayed()->mov(G0, offset); | |
| 2126 | |
| 2127 // copy 1 element to align 'to' on an 8 byte boundary | |
| 2128 __ andcc(to, 7, G0); | |
| 2129 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 2130 __ delayed()->ld(from, 0, O3); | |
| 2131 __ inc(from, 4); | |
| 2132 __ inc(to, 4); | |
| 2133 __ dec(count); | |
| 2134 __ st(O3, to, -4); | |
| 2135 __ BIND(L_skip_alignment); | |
| 2136 | |
| 2137 // if arrays have same alignment mod 8, do 4 elements copy | |
| 2138 __ andcc(from, 7, G0); | |
| 2139 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 2140 __ delayed()->ld(from, 0, O3); | |
| 2141 | |
| 2142 // | |
| 2143 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 2144 // to form 2 aligned 8-bytes chunks to store. | |
| 2145 // | |
| 2146 // copy_16_bytes_forward_with_shift() is not used here since this | |
| 2147 // code is more optimal. | |
| 2148 | |
| 2149 // copy with shift 4 elements (16 bytes) at a time | |
| 2150 __ dec(count, 4); // The cmp at the beginning guaranty count >= 4 | |
| 3903 | 2151 __ sllx(O3, 32, O3); |
| 2152 | |
| 2153 disjoint_copy_core(from, to, count, 2, 16, copy_16_bytes_loop); | |
| 0 | 2154 |
| 2155 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
| 2156 __ delayed()->inc(count, 4); // restore 'count' | |
| 2157 | |
| 2158 __ BIND(L_aligned_copy); | |
| 3903 | 2159 } // !aligned |
| 2160 | |
| 0 | 2161 // copy 4 elements (16 bytes) at a time |
| 2162 __ and3(count, 1, G4); // Save | |
| 2163 __ srl(count, 1, count); | |
| 2164 generate_disjoint_long_copy_core(aligned); | |
| 2165 __ mov(G4, count); // Restore | |
| 2166 | |
| 2167 // copy 1 element at a time | |
| 2168 __ BIND(L_copy_4_bytes); | |
| 3839 | 2169 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
| 0 | 2170 __ BIND(L_copy_4_bytes_loop); |
| 2171 __ ld(from, offset, O3); | |
| 2172 __ deccc(count); | |
| 2173 __ st(O3, to, offset); | |
| 2174 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop); | |
| 2175 __ delayed()->inc(offset, 4); | |
| 2176 __ BIND(L_exit); | |
| 2177 } | |
| 2178 | |
| 2179 // | |
| 2180 // Generate stub for disjoint int copy. If "aligned" is true, the | |
| 2181 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2182 // | |
| 2183 // Arguments for generated stub: | |
| 2184 // from: O0 | |
| 2185 // to: O1 | |
| 2186 // count: O2 treated as signed | |
| 2187 // | |
|
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2188 address generate_disjoint_int_copy(bool aligned, address *entry, const char *name) { |
| 0 | 2189 __ align(CodeEntryAlignment); |
| 2190 StubCodeMark mark(this, "StubRoutines", name); | |
| 2191 address start = __ pc(); | |
| 2192 | |
| 2193 const Register count = O2; | |
| 2194 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 2195 | |
|
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2196 if (entry != NULL) { |
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2197 *entry = __ pc(); |
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2198 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2199 BLOCK_COMMENT("Entry:"); |
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2200 } |
| 0 | 2201 |
| 2202 generate_disjoint_int_copy_core(aligned); | |
| 2203 | |
| 2204 // O3, O4 are used as temp registers | |
| 2205 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
| 2206 __ retl(); | |
| 2207 __ delayed()->mov(G0, O0); // return 0 | |
| 2208 return start; | |
| 2209 } | |
| 2210 | |
| 2211 // | |
| 2212 // Generate core code for conjoint int copy (and oop copy on 32-bit). | |
| 2213 // If "aligned" is true, the "from" and "to" addresses are assumed | |
| 2214 // to be heapword aligned. | |
| 2215 // | |
| 2216 // Arguments: | |
| 2217 // from: O0 | |
| 2218 // to: O1 | |
| 2219 // count: O2 treated as signed | |
| 2220 // | |
| 2221 void generate_conjoint_int_copy_core(bool aligned) { | |
| 2222 // Do reverse copy. | |
| 2223 | |
| 2224 Label L_skip_alignment, L_aligned_copy; | |
| 2225 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
| 2226 | |
| 2227 const Register from = O0; // source array address | |
| 2228 const Register to = O1; // destination array address | |
| 2229 const Register count = O2; // elements count | |
| 2230 const Register end_from = from; // source array end address | |
| 2231 const Register end_to = to; // destination array end address | |
| 2232 // O3, O4, O5, G3 are used as temp registers | |
| 2233 | |
| 2234 const Register byte_count = O3; // bytes count to copy | |
| 2235 | |
| 2236 __ sllx(count, LogBytesPerInt, byte_count); | |
| 2237 __ add(to, byte_count, end_to); // offset after last copied element | |
| 2238 | |
| 2239 __ cmp(count, 5); // for short arrays, just do single element copy | |
| 2240 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
| 2241 __ delayed()->add(from, byte_count, end_from); | |
| 2242 | |
| 2243 // copy 1 element to align 'to' on an 8 byte boundary | |
| 2244 __ andcc(end_to, 7, G0); | |
| 2245 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 2246 __ delayed()->nop(); | |
| 2247 __ dec(count); | |
| 2248 __ dec(end_from, 4); | |
| 2249 __ dec(end_to, 4); | |
| 2250 __ ld(end_from, 0, O4); | |
| 2251 __ st(O4, end_to, 0); | |
| 2252 __ BIND(L_skip_alignment); | |
| 2253 | |
| 2254 // Check if 'end_from' and 'end_to' has the same alignment. | |
| 2255 __ andcc(end_from, 7, G0); | |
| 2256 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 2257 __ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4 | |
| 2258 | |
| 2259 // copy with shift 4 elements (16 bytes) at a time | |
| 2260 // | |
| 2261 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 2262 // to form 2 aligned 8-bytes chunks to store. | |
| 2263 // | |
| 2264 __ ldx(end_from, -4, O3); | |
| 1365 | 2265 __ align(OptoLoopAlignment); |
| 0 | 2266 __ BIND(L_copy_16_bytes); |
| 2267 __ ldx(end_from, -12, O4); | |
| 2268 __ deccc(count, 4); | |
| 2269 __ ldx(end_from, -20, O5); | |
| 2270 __ dec(end_to, 16); | |
| 2271 __ dec(end_from, 16); | |
| 2272 __ srlx(O3, 32, O3); | |
| 2273 __ sllx(O4, 32, G3); | |
| 2274 __ bset(G3, O3); | |
| 2275 __ stx(O3, end_to, 8); | |
| 2276 __ srlx(O4, 32, O4); | |
| 2277 __ sllx(O5, 32, G3); | |
| 2278 __ bset(O4, G3); | |
| 2279 __ stx(G3, end_to, 0); | |
| 2280 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
| 2281 __ delayed()->mov(O5, O3); | |
| 2282 | |
| 2283 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
| 2284 __ delayed()->inc(count, 4); | |
| 2285 | |
| 2286 // copy 4 elements (16 bytes) at a time | |
| 1365 | 2287 __ align(OptoLoopAlignment); |
| 0 | 2288 __ BIND(L_aligned_copy); |
| 2289 __ dec(end_from, 16); | |
| 2290 __ ldx(end_from, 8, O3); | |
| 2291 __ ldx(end_from, 0, O4); | |
| 2292 __ dec(end_to, 16); | |
| 2293 __ deccc(count, 4); | |
| 2294 __ stx(O3, end_to, 8); | |
| 2295 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
| 2296 __ delayed()->stx(O4, end_to, 0); | |
| 2297 __ inc(count, 4); | |
| 2298 | |
| 2299 // copy 1 element (4 bytes) at a time | |
| 2300 __ BIND(L_copy_4_bytes); | |
| 3839 | 2301 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
| 0 | 2302 __ BIND(L_copy_4_bytes_loop); |
| 2303 __ dec(end_from, 4); | |
| 2304 __ dec(end_to, 4); | |
| 2305 __ ld(end_from, 0, O4); | |
| 2306 __ deccc(count); | |
| 2307 __ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop); | |
| 2308 __ delayed()->st(O4, end_to, 0); | |
| 2309 __ BIND(L_exit); | |
| 2310 } | |
| 2311 | |
| 2312 // | |
| 2313 // Generate stub for conjoint int copy. If "aligned" is true, the | |
| 2314 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2315 // | |
| 2316 // Arguments for generated stub: | |
| 2317 // from: O0 | |
| 2318 // to: O1 | |
| 2319 // count: O2 treated as signed | |
| 2320 // | |
|
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2321 address generate_conjoint_int_copy(bool aligned, address nooverlap_target, |
|
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2322 address *entry, const char *name) { |
| 0 | 2323 __ align(CodeEntryAlignment); |
| 2324 StubCodeMark mark(this, "StubRoutines", name); | |
| 2325 address start = __ pc(); | |
| 2326 | |
| 2327 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
| 2328 | |
|
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2329 if (entry != NULL) { |
|
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2330 *entry = __ pc(); |
|
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2331 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
|
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2332 BLOCK_COMMENT("Entry:"); |
|
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|
2333 } |
| 0 | 2334 |
| 2335 array_overlap_test(nooverlap_target, 2); | |
| 2336 | |
| 2337 generate_conjoint_int_copy_core(aligned); | |
| 2338 | |
| 2339 // O3, O4 are used as temp registers | |
| 2340 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
| 2341 __ retl(); | |
| 2342 __ delayed()->mov(G0, O0); // return 0 | |
| 2343 return start; | |
| 2344 } | |
| 2345 | |
| 2346 // | |
| 3903 | 2347 // Helper methods for generate_disjoint_long_copy_core() |
| 2348 // | |
| 2349 void copy_64_bytes_loop(Register from, Register to, Register count, int count_dec, | |
| 2350 Label& L_loop, bool use_prefetch, bool use_bis) { | |
| 2351 __ align(OptoLoopAlignment); | |
| 2352 __ BIND(L_loop); | |
| 2353 for (int off = 0; off < 64; off += 16) { | |
| 2354 if (use_prefetch && (off & 31) == 0) { | |
| 2355 if (ArraycopySrcPrefetchDistance > 0) { | |
|
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2356 __ prefetch(from, ArraycopySrcPrefetchDistance+off, Assembler::severalReads); |
| 3903 | 2357 } |
| 2358 if (ArraycopyDstPrefetchDistance > 0) { | |
|
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2359 __ prefetch(to, ArraycopyDstPrefetchDistance+off, Assembler::severalWritesAndPossiblyReads); |
| 3903 | 2360 } |
| 2361 } | |
| 2362 __ ldx(from, off+0, O4); | |
| 2363 __ ldx(from, off+8, O5); | |
| 2364 if (use_bis) { | |
| 2365 __ stxa(O4, to, off+0); | |
| 2366 __ stxa(O5, to, off+8); | |
| 2367 } else { | |
| 2368 __ stx(O4, to, off+0); | |
| 2369 __ stx(O5, to, off+8); | |
| 2370 } | |
| 2371 } | |
| 2372 __ deccc(count, 8); | |
| 2373 __ inc(from, 64); | |
| 2374 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 2375 __ delayed()->inc(to, 64); | |
| 2376 } | |
| 2377 | |
| 2378 // | |
| 0 | 2379 // Generate core code for disjoint long copy (and oop copy on 64-bit). |
| 2380 // "aligned" is ignored, because we must make the stronger | |
| 2381 // assumption that both addresses are always 64-bit aligned. | |
| 2382 // | |
| 2383 // Arguments: | |
| 2384 // from: O0 | |
| 2385 // to: O1 | |
| 2386 // count: O2 treated as signed | |
| 2387 // | |
|
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2388 // count -= 2; |
|
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2389 // if ( count >= 0 ) { // >= 2 elements |
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2390 // if ( count > 6) { // >= 8 elements |
|
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2391 // count -= 6; // original count - 8 |
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2392 // do { |
|
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2393 // copy_8_elements; |
|
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2394 // count -= 8; |
|
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2395 // } while ( count >= 0 ); |
|
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2396 // count += 6; |
|
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2397 // } |
|
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2398 // if ( count >= 0 ) { // >= 2 elements |
|
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2399 // do { |
|
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2400 // copy_2_elements; |
|
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2401 // } while ( (count=count-2) >= 0 ); |
|
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2402 // } |
|
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2403 // } |
|
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2404 // count += 2; |
|
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2405 // if ( count != 0 ) { // 1 element left |
|
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2406 // copy_1_element; |
|
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|
2407 // } |
|
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2408 // |
| 0 | 2409 void generate_disjoint_long_copy_core(bool aligned) { |
| 2410 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
| 2411 const Register from = O0; // source array address | |
| 2412 const Register to = O1; // destination array address | |
| 2413 const Register count = O2; // elements count | |
| 2414 const Register offset0 = O4; // element offset | |
| 2415 const Register offset8 = O5; // next element offset | |
| 2416 | |
| 3903 | 2417 __ deccc(count, 2); |
| 2418 __ mov(G0, offset0); // offset from start of arrays (0) | |
| 2419 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); | |
| 2420 __ delayed()->add(offset0, 8, offset8); | |
|
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2421 |
|
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2422 // Copy by 64 bytes chunks |
| 3903 | 2423 |
|
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2424 const Register from64 = O3; // source address |
|
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2425 const Register to64 = G3; // destination address |
| 3903 | 2426 __ subcc(count, 6, O3); |
| 2427 __ brx(Assembler::negative, false, Assembler::pt, L_copy_16_bytes ); | |
| 2428 __ delayed()->mov(to, to64); | |
| 2429 // Now we can use O4(offset0), O5(offset8) as temps | |
| 2430 __ mov(O3, count); | |
| 2431 // count >= 0 (original count - 8) | |
| 2432 __ mov(from, from64); | |
| 2433 | |
| 2434 disjoint_copy_core(from64, to64, count, 3, 64, copy_64_bytes_loop); | |
|
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2435 |
|
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2436 // Restore O4(offset0), O5(offset8) |
|
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2437 __ sub(from64, from, offset0); |
| 3903 | 2438 __ inccc(count, 6); // restore count |
|
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2439 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); |
|
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2440 __ delayed()->add(offset0, 8, offset8); |
|
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|
2441 |
|
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|
2442 // Copy by 16 bytes chunks |
| 1365 | 2443 __ align(OptoLoopAlignment); |
| 0 | 2444 __ BIND(L_copy_16_bytes); |
| 2445 __ ldx(from, offset0, O3); | |
| 2446 __ ldx(from, offset8, G3); | |
| 2447 __ deccc(count, 2); | |
| 2448 __ stx(O3, to, offset0); | |
| 2449 __ inc(offset0, 16); | |
| 2450 __ stx(G3, to, offset8); | |
| 2451 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
| 2452 __ delayed()->inc(offset8, 16); | |
| 2453 | |
|
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|
2454 // Copy last 8 bytes |
| 0 | 2455 __ BIND(L_copy_8_bytes); |
| 2456 __ inccc(count, 2); | |
| 2457 __ brx(Assembler::zero, true, Assembler::pn, L_exit ); | |
| 2458 __ delayed()->mov(offset0, offset8); // Set O5 used by other stubs | |
| 2459 __ ldx(from, offset0, O3); | |
| 2460 __ stx(O3, to, offset0); | |
| 2461 __ BIND(L_exit); | |
| 2462 } | |
| 2463 | |
| 2464 // | |
| 2465 // Generate stub for disjoint long copy. | |
| 2466 // "aligned" is ignored, because we must make the stronger | |
| 2467 // assumption that both addresses are always 64-bit aligned. | |
| 2468 // | |
| 2469 // Arguments for generated stub: | |
| 2470 // from: O0 | |
| 2471 // to: O1 | |
| 2472 // count: O2 treated as signed | |
| 2473 // | |
|
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|
2474 address generate_disjoint_long_copy(bool aligned, address *entry, const char *name) { |
| 0 | 2475 __ align(CodeEntryAlignment); |
| 2476 StubCodeMark mark(this, "StubRoutines", name); | |
| 2477 address start = __ pc(); | |
| 2478 | |
| 2479 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
| 2480 | |
|
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2481 if (entry != NULL) { |
|
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|
2482 *entry = __ pc(); |
|
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|
2483 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
|
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|
2484 BLOCK_COMMENT("Entry:"); |
|
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|
2485 } |
| 0 | 2486 |
| 2487 generate_disjoint_long_copy_core(aligned); | |
| 2488 | |
| 2489 // O3, O4 are used as temp registers | |
| 2490 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
| 2491 __ retl(); | |
| 2492 __ delayed()->mov(G0, O0); // return 0 | |
| 2493 return start; | |
| 2494 } | |
| 2495 | |
| 2496 // | |
| 2497 // Generate core code for conjoint long copy (and oop copy on 64-bit). | |
| 2498 // "aligned" is ignored, because we must make the stronger | |
| 2499 // assumption that both addresses are always 64-bit aligned. | |
| 2500 // | |
| 2501 // Arguments: | |
| 2502 // from: O0 | |
| 2503 // to: O1 | |
| 2504 // count: O2 treated as signed | |
| 2505 // | |
| 2506 void generate_conjoint_long_copy_core(bool aligned) { | |
| 2507 // Do reverse copy. | |
| 2508 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
| 2509 const Register from = O0; // source array address | |
| 2510 const Register to = O1; // destination array address | |
| 2511 const Register count = O2; // elements count | |
| 2512 const Register offset8 = O4; // element offset | |
| 2513 const Register offset0 = O5; // previous element offset | |
| 2514 | |
| 2515 __ subcc(count, 1, count); | |
| 2516 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes ); | |
| 2517 __ delayed()->sllx(count, LogBytesPerLong, offset8); | |
| 2518 __ sub(offset8, 8, offset0); | |
| 1365 | 2519 __ align(OptoLoopAlignment); |
| 0 | 2520 __ BIND(L_copy_16_bytes); |
| 2521 __ ldx(from, offset8, O2); | |
| 2522 __ ldx(from, offset0, O3); | |
| 2523 __ stx(O2, to, offset8); | |
| 2524 __ deccc(offset8, 16); // use offset8 as counter | |
| 2525 __ stx(O3, to, offset0); | |
| 2526 __ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes); | |
| 2527 __ delayed()->dec(offset0, 16); | |
| 2528 | |
| 2529 __ BIND(L_copy_8_bytes); | |
| 2530 __ brx(Assembler::negative, false, Assembler::pn, L_exit ); | |
| 2531 __ delayed()->nop(); | |
| 2532 __ ldx(from, 0, O3); | |
| 2533 __ stx(O3, to, 0); | |
| 2534 __ BIND(L_exit); | |
| 2535 } | |
| 2536 | |
| 2537 // Generate stub for conjoint long copy. | |
| 2538 // "aligned" is ignored, because we must make the stronger | |
| 2539 // assumption that both addresses are always 64-bit aligned. | |
| 2540 // | |
| 2541 // Arguments for generated stub: | |
| 2542 // from: O0 | |
| 2543 // to: O1 | |
| 2544 // count: O2 treated as signed | |
| 2545 // | |
|
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|
2546 address generate_conjoint_long_copy(bool aligned, address nooverlap_target, |
|
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|
2547 address *entry, const char *name) { |
| 0 | 2548 __ align(CodeEntryAlignment); |
| 2549 StubCodeMark mark(this, "StubRoutines", name); | |
| 2550 address start = __ pc(); | |
| 2551 | |
| 2324 | 2552 assert(aligned, "Should always be aligned"); |
| 0 | 2553 |
| 2554 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
| 2555 | |
|
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2556 if (entry != NULL) { |
|
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|
2557 *entry = __ pc(); |
|
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|
2558 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
|
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|
2559 BLOCK_COMMENT("Entry:"); |
|
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|
2560 } |
| 0 | 2561 |
| 2562 array_overlap_test(nooverlap_target, 3); | |
| 2563 | |
| 2564 generate_conjoint_long_copy_core(aligned); | |
| 2565 | |
| 2566 // O3, O4 are used as temp registers | |
| 2567 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
| 2568 __ retl(); | |
| 2569 __ delayed()->mov(G0, O0); // return 0 | |
| 2570 return start; | |
| 2571 } | |
| 2572 | |
| 2573 // Generate stub for disjoint oop copy. If "aligned" is true, the | |
| 2574 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2575 // | |
| 2576 // Arguments for generated stub: | |
| 2577 // from: O0 | |
| 2578 // to: O1 | |
| 2579 // count: O2 treated as signed | |
| 2580 // | |
| 2324 | 2581 address generate_disjoint_oop_copy(bool aligned, address *entry, const char *name, |
| 2582 bool dest_uninitialized = false) { | |
| 0 | 2583 |
| 2584 const Register from = O0; // source array address | |
| 2585 const Register to = O1; // destination array address | |
| 2586 const Register count = O2; // elements count | |
| 2587 | |
| 2588 __ align(CodeEntryAlignment); | |
| 2589 StubCodeMark mark(this, "StubRoutines", name); | |
| 2590 address start = __ pc(); | |
| 2591 | |
| 2592 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 2593 | |
|
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2594 if (entry != NULL) { |
|
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|
2595 *entry = __ pc(); |
|
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|
2596 // caller can pass a 64-bit byte count here |
|
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|
2597 BLOCK_COMMENT("Entry:"); |
|
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|
2598 } |
| 0 | 2599 |
| 2600 // save arguments for barrier generation | |
| 2601 __ mov(to, G1); | |
| 2602 __ mov(count, G5); | |
| 2324 | 2603 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
| 0 | 2604 #ifdef _LP64 |
|
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2605 assert_clean_int(count, O3); // Make sure 'count' is clean int. |
|
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2606 if (UseCompressedOops) { |
|
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|
2607 generate_disjoint_int_copy_core(aligned); |
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2608 } else { |
|
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|
2609 generate_disjoint_long_copy_core(aligned); |
|
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2610 } |
| 0 | 2611 #else |
| 2612 generate_disjoint_int_copy_core(aligned); | |
| 2613 #endif | |
| 2614 // O0 is used as temp register | |
| 2615 gen_write_ref_array_post_barrier(G1, G5, O0); | |
| 2616 | |
| 2617 // O3, O4 are used as temp registers | |
| 2618 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
| 2619 __ retl(); | |
| 2620 __ delayed()->mov(G0, O0); // return 0 | |
| 2621 return start; | |
| 2622 } | |
| 2623 | |
| 2624 // Generate stub for conjoint oop copy. If "aligned" is true, the | |
| 2625 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2626 // | |
| 2627 // Arguments for generated stub: | |
| 2628 // from: O0 | |
| 2629 // to: O1 | |
| 2630 // count: O2 treated as signed | |
| 2631 // | |
|
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2632 address generate_conjoint_oop_copy(bool aligned, address nooverlap_target, |
| 2324 | 2633 address *entry, const char *name, |
| 2634 bool dest_uninitialized = false) { | |
| 0 | 2635 |
| 2636 const Register from = O0; // source array address | |
| 2637 const Register to = O1; // destination array address | |
| 2638 const Register count = O2; // elements count | |
| 2639 | |
| 2640 __ align(CodeEntryAlignment); | |
| 2641 StubCodeMark mark(this, "StubRoutines", name); | |
| 2642 address start = __ pc(); | |
| 2643 | |
| 2644 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 2645 | |
|
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2646 if (entry != NULL) { |
|
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|
2647 *entry = __ pc(); |
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2648 // caller can pass a 64-bit byte count here |
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2649 BLOCK_COMMENT("Entry:"); |
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|
2650 } |
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2651 |
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|
2652 array_overlap_test(nooverlap_target, LogBytesPerHeapOop); |
| 0 | 2653 |
| 2654 // save arguments for barrier generation | |
| 2655 __ mov(to, G1); | |
| 2656 __ mov(count, G5); | |
| 2324 | 2657 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
| 0 | 2658 |
| 2659 #ifdef _LP64 | |
|
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2660 if (UseCompressedOops) { |
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2661 generate_conjoint_int_copy_core(aligned); |
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2662 } else { |
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2663 generate_conjoint_long_copy_core(aligned); |
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2664 } |
| 0 | 2665 #else |
| 2666 generate_conjoint_int_copy_core(aligned); | |
| 2667 #endif | |
| 2668 | |
| 2669 // O0 is used as temp register | |
| 2670 gen_write_ref_array_post_barrier(G1, G5, O0); | |
| 2671 | |
| 2672 // O3, O4 are used as temp registers | |
| 2673 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
| 2674 __ retl(); | |
| 2675 __ delayed()->mov(G0, O0); // return 0 | |
| 2676 return start; | |
| 2677 } | |
| 2678 | |
| 2679 | |
| 2680 // Helper for generating a dynamic type check. | |
| 2681 // Smashes only the given temp registers. | |
| 2682 void generate_type_check(Register sub_klass, | |
| 2683 Register super_check_offset, | |
| 2684 Register super_klass, | |
| 2685 Register temp, | |
|
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2686 Label& L_success) { |
| 0 | 2687 assert_different_registers(sub_klass, super_check_offset, super_klass, temp); |
| 2688 | |
| 2689 BLOCK_COMMENT("type_check:"); | |
| 2690 | |
|
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2691 Label L_miss, L_pop_to_miss; |
| 0 | 2692 |
| 2693 assert_clean_int(super_check_offset, temp); | |
| 2694 | |
|
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2695 __ check_klass_subtype_fast_path(sub_klass, super_klass, temp, noreg, |
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2696 &L_success, &L_miss, NULL, |
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2697 super_check_offset); |
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2698 |
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2699 BLOCK_COMMENT("type_check_slow_path:"); |
| 0 | 2700 __ save_frame(0); |
|
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2701 __ check_klass_subtype_slow_path(sub_klass->after_save(), |
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2702 super_klass->after_save(), |
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2703 L0, L1, L2, L4, |
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2704 NULL, &L_pop_to_miss); |
| 3839 | 2705 __ ba(L_success); |
|
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2706 __ delayed()->restore(); |
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2707 |
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2708 __ bind(L_pop_to_miss); |
| 0 | 2709 __ restore(); |
| 2710 | |
| 2711 // Fall through on failure! | |
| 2712 __ BIND(L_miss); | |
| 2713 } | |
| 2714 | |
| 2715 | |
| 2716 // Generate stub for checked oop copy. | |
| 2717 // | |
| 2718 // Arguments for generated stub: | |
| 2719 // from: O0 | |
| 2720 // to: O1 | |
| 2721 // count: O2 treated as signed | |
| 2722 // ckoff: O3 (super_check_offset) | |
| 2723 // ckval: O4 (super_klass) | |
| 2724 // ret: O0 zero for success; (-1^K) where K is partial transfer count | |
| 2725 // | |
| 2324 | 2726 address generate_checkcast_copy(const char *name, address *entry, bool dest_uninitialized = false) { |
| 0 | 2727 |
| 2728 const Register O0_from = O0; // source array address | |
| 2729 const Register O1_to = O1; // destination array address | |
| 2730 const Register O2_count = O2; // elements count | |
| 2731 const Register O3_ckoff = O3; // super_check_offset | |
| 2732 const Register O4_ckval = O4; // super_klass | |
| 2733 | |
| 2734 const Register O5_offset = O5; // loop var, with stride wordSize | |
| 2735 const Register G1_remain = G1; // loop var, with stride -1 | |
| 2736 const Register G3_oop = G3; // actual oop copied | |
| 2737 const Register G4_klass = G4; // oop._klass | |
| 2738 const Register G5_super = G5; // oop._klass._primary_supers[ckval] | |
| 2739 | |
| 2740 __ align(CodeEntryAlignment); | |
| 2741 StubCodeMark mark(this, "StubRoutines", name); | |
| 2742 address start = __ pc(); | |
| 2743 | |
| 2744 #ifdef ASSERT | |
|
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2745 // We sometimes save a frame (see generate_type_check below). |
| 0 | 2746 // If this will cause trouble, let's fail now instead of later. |
| 2747 __ save_frame(0); | |
| 2748 __ restore(); | |
| 2749 #endif | |
| 2750 | |
|
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2751 assert_clean_int(O2_count, G1); // Make sure 'count' is clean int. |
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2752 |
| 0 | 2753 #ifdef ASSERT |
| 2754 // caller guarantees that the arrays really are different | |
| 2755 // otherwise, we would have to make conjoint checks | |
| 2756 { Label L; | |
| 2757 __ mov(O3, G1); // spill: overlap test smashes O3 | |
| 2758 __ mov(O4, G4); // spill: overlap test smashes O4 | |
|
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2759 array_overlap_test(L, LogBytesPerHeapOop); |
| 0 | 2760 __ stop("checkcast_copy within a single array"); |
| 2761 __ bind(L); | |
| 2762 __ mov(G1, O3); | |
| 2763 __ mov(G4, O4); | |
| 2764 } | |
| 2765 #endif //ASSERT | |
| 2766 | |
|
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2767 if (entry != NULL) { |
|
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2768 *entry = __ pc(); |
|
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2769 // caller can pass a 64-bit byte count here (from generic stub) |
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2770 BLOCK_COMMENT("Entry:"); |
|
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|
2771 } |
| 2324 | 2772 gen_write_ref_array_pre_barrier(O1_to, O2_count, dest_uninitialized); |
| 0 | 2773 |
| 2774 Label load_element, store_element, do_card_marks, fail, done; | |
| 2775 __ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it | |
| 2776 __ brx(Assembler::notZero, false, Assembler::pt, load_element); | |
| 2777 __ delayed()->mov(G0, O5_offset); // offset from start of arrays | |
| 2778 | |
| 2779 // Empty array: Nothing to do. | |
| 2780 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
| 2781 __ retl(); | |
| 2782 __ delayed()->set(0, O0); // return 0 on (trivial) success | |
| 2783 | |
| 2784 // ======== begin loop ======== | |
| 2785 // (Loop is rotated; its entry is load_element.) | |
| 2786 // Loop variables: | |
| 2787 // (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays | |
| 2788 // (O2 = len; O2 != 0; O2--) --- number of oops *remaining* | |
| 2789 // G3, G4, G5 --- current oop, oop.klass, oop.klass.super | |
| 1365 | 2790 __ align(OptoLoopAlignment); |
| 0 | 2791 |
|
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2792 __ BIND(store_element); |
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2793 __ deccc(G1_remain); // decrement the count |
|
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2794 __ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop |
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2795 __ inc(O5_offset, heapOopSize); // step to next offset |
| 0 | 2796 __ brx(Assembler::zero, true, Assembler::pt, do_card_marks); |
| 2797 __ delayed()->set(0, O0); // return -1 on success | |
| 2798 | |
| 2799 // ======== loop entry is here ======== | |
|
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2800 __ BIND(load_element); |
|
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2801 __ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop |
| 3839 | 2802 __ br_null_short(G3_oop, Assembler::pt, store_element); |
| 0 | 2803 |
|
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2804 __ load_klass(G3_oop, G4_klass); // query the object klass |
| 0 | 2805 |
| 2806 generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super, | |
| 2807 // branch to this on success: | |
|
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2808 store_element); |
| 0 | 2809 // ======== end loop ======== |
| 2810 | |
| 2811 // It was a real error; we must depend on the caller to finish the job. | |
| 2812 // Register G1 has number of *remaining* oops, O2 number of *total* oops. | |
| 2813 // Emit GC store barriers for the oops we have copied (O2 minus G1), | |
| 2814 // and report their number to the caller. | |
|
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2815 __ BIND(fail); |
| 0 | 2816 __ subcc(O2_count, G1_remain, O2_count); |
| 2817 __ brx(Assembler::zero, false, Assembler::pt, done); | |
| 2818 __ delayed()->not1(O2_count, O0); // report (-1^K) to caller | |
| 2819 | |
|
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2820 __ BIND(do_card_marks); |
| 0 | 2821 gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2] |
| 2822 | |
|
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2823 __ BIND(done); |
| 0 | 2824 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); |
| 2825 __ retl(); | |
| 2826 __ delayed()->nop(); // return value in 00 | |
| 2827 | |
| 2828 return start; | |
| 2829 } | |
| 2830 | |
| 2831 | |
| 2832 // Generate 'unsafe' array copy stub | |
| 2833 // Though just as safe as the other stubs, it takes an unscaled | |
| 2834 // size_t argument instead of an element count. | |
| 2835 // | |
| 2836 // Arguments for generated stub: | |
| 2837 // from: O0 | |
| 2838 // to: O1 | |
| 2839 // count: O2 byte count, treated as ssize_t, can be zero | |
| 2840 // | |
| 2841 // Examines the alignment of the operands and dispatches | |
| 2842 // to a long, int, short, or byte copy loop. | |
| 2843 // | |
|
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2844 address generate_unsafe_copy(const char* name, |
|
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2845 address byte_copy_entry, |
|
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2846 address short_copy_entry, |
|
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2847 address int_copy_entry, |
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2848 address long_copy_entry) { |
| 0 | 2849 |
| 2850 const Register O0_from = O0; // source array address | |
| 2851 const Register O1_to = O1; // destination array address | |
| 2852 const Register O2_count = O2; // elements count | |
| 2853 | |
| 2854 const Register G1_bits = G1; // test copy of low bits | |
| 2855 | |
| 2856 __ align(CodeEntryAlignment); | |
| 2857 StubCodeMark mark(this, "StubRoutines", name); | |
| 2858 address start = __ pc(); | |
| 2859 | |
| 2860 // bump this on entry, not on exit: | |
| 2861 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3); | |
| 2862 | |
| 2863 __ or3(O0_from, O1_to, G1_bits); | |
| 2864 __ or3(O2_count, G1_bits, G1_bits); | |
| 2865 | |
| 2866 __ btst(BytesPerLong-1, G1_bits); | |
| 2867 __ br(Assembler::zero, true, Assembler::pt, | |
| 2868 long_copy_entry, relocInfo::runtime_call_type); | |
| 2869 // scale the count on the way out: | |
| 2870 __ delayed()->srax(O2_count, LogBytesPerLong, O2_count); | |
| 2871 | |
| 2872 __ btst(BytesPerInt-1, G1_bits); | |
| 2873 __ br(Assembler::zero, true, Assembler::pt, | |
| 2874 int_copy_entry, relocInfo::runtime_call_type); | |
| 2875 // scale the count on the way out: | |
| 2876 __ delayed()->srax(O2_count, LogBytesPerInt, O2_count); | |
| 2877 | |
| 2878 __ btst(BytesPerShort-1, G1_bits); | |
| 2879 __ br(Assembler::zero, true, Assembler::pt, | |
| 2880 short_copy_entry, relocInfo::runtime_call_type); | |
| 2881 // scale the count on the way out: | |
| 2882 __ delayed()->srax(O2_count, LogBytesPerShort, O2_count); | |
| 2883 | |
| 2884 __ br(Assembler::always, false, Assembler::pt, | |
| 2885 byte_copy_entry, relocInfo::runtime_call_type); | |
| 2886 __ delayed()->nop(); | |
| 2887 | |
| 2888 return start; | |
| 2889 } | |
| 2890 | |
| 2891 | |
| 2892 // Perform range checks on the proposed arraycopy. | |
| 2893 // Kills the two temps, but nothing else. | |
| 2894 // Also, clean the sign bits of src_pos and dst_pos. | |
| 2895 void arraycopy_range_checks(Register src, // source array oop (O0) | |
| 2896 Register src_pos, // source position (O1) | |
| 2897 Register dst, // destination array oo (O2) | |
| 2898 Register dst_pos, // destination position (O3) | |
| 2899 Register length, // length of copy (O4) | |
| 2900 Register temp1, Register temp2, | |
| 2901 Label& L_failed) { | |
| 2902 BLOCK_COMMENT("arraycopy_range_checks:"); | |
| 2903 | |
| 2904 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
| 2905 | |
| 2906 const Register array_length = temp1; // scratch | |
| 2907 const Register end_pos = temp2; // scratch | |
| 2908 | |
| 2909 // Note: This next instruction may be in the delay slot of a branch: | |
| 2910 __ add(length, src_pos, end_pos); // src_pos + length | |
| 2911 __ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length); | |
| 2912 __ cmp(end_pos, array_length); | |
| 2913 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
| 2914 | |
| 2915 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
| 2916 __ delayed()->add(length, dst_pos, end_pos); // dst_pos + length | |
| 2917 __ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length); | |
| 2918 __ cmp(end_pos, array_length); | |
| 2919 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
| 2920 | |
| 2921 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
| 2922 // Move with sign extension can be used since they are positive. | |
| 2923 __ delayed()->signx(src_pos, src_pos); | |
| 2924 __ signx(dst_pos, dst_pos); | |
| 2925 | |
| 2926 BLOCK_COMMENT("arraycopy_range_checks done"); | |
| 2927 } | |
| 2928 | |
| 2929 | |
| 2930 // | |
| 2931 // Generate generic array copy stubs | |
| 2932 // | |
| 2933 // Input: | |
| 2934 // O0 - src oop | |
| 2935 // O1 - src_pos | |
| 2936 // O2 - dst oop | |
| 2937 // O3 - dst_pos | |
| 2938 // O4 - element count | |
| 2939 // | |
| 2940 // Output: | |
| 2941 // O0 == 0 - success | |
| 2942 // O0 == -1 - need to call System.arraycopy | |
| 2943 // | |
|
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|
2944 address generate_generic_copy(const char *name, |
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2945 address entry_jbyte_arraycopy, |
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2946 address entry_jshort_arraycopy, |
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|
2947 address entry_jint_arraycopy, |
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|
2948 address entry_oop_arraycopy, |
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2949 address entry_jlong_arraycopy, |
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|
2950 address entry_checkcast_arraycopy) { |
| 0 | 2951 Label L_failed, L_objArray; |
| 2952 | |
| 2953 // Input registers | |
| 2954 const Register src = O0; // source array oop | |
| 2955 const Register src_pos = O1; // source position | |
| 2956 const Register dst = O2; // destination array oop | |
| 2957 const Register dst_pos = O3; // destination position | |
| 2958 const Register length = O4; // elements count | |
| 2959 | |
| 2960 // registers used as temp | |
| 2961 const Register G3_src_klass = G3; // source array klass | |
| 2962 const Register G4_dst_klass = G4; // destination array klass | |
| 2963 const Register G5_lh = G5; // layout handler | |
| 2964 const Register O5_temp = O5; | |
| 2965 | |
| 2966 __ align(CodeEntryAlignment); | |
| 2967 StubCodeMark mark(this, "StubRoutines", name); | |
| 2968 address start = __ pc(); | |
| 2969 | |
| 2970 // bump this on entry, not on exit: | |
| 2971 inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3); | |
| 2972 | |
| 2973 // In principle, the int arguments could be dirty. | |
| 2974 //assert_clean_int(src_pos, G1); | |
| 2975 //assert_clean_int(dst_pos, G1); | |
| 2976 //assert_clean_int(length, G1); | |
| 2977 | |
| 2978 //----------------------------------------------------------------------- | |
| 2979 // Assembler stubs will be used for this call to arraycopy | |
| 2980 // if the following conditions are met: | |
| 2981 // | |
| 2982 // (1) src and dst must not be null. | |
| 2983 // (2) src_pos must not be negative. | |
| 2984 // (3) dst_pos must not be negative. | |
| 2985 // (4) length must not be negative. | |
| 2986 // (5) src klass and dst klass should be the same and not NULL. | |
| 2987 // (6) src and dst should be arrays. | |
| 2988 // (7) src_pos + length must not exceed length of src. | |
| 2989 // (8) dst_pos + length must not exceed length of dst. | |
| 2990 BLOCK_COMMENT("arraycopy initial argument checks"); | |
| 2991 | |
| 2992 // if (src == NULL) return -1; | |
| 2993 __ br_null(src, false, Assembler::pn, L_failed); | |
| 2994 | |
| 2995 // if (src_pos < 0) return -1; | |
| 2996 __ delayed()->tst(src_pos); | |
| 2997 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
| 2998 __ delayed()->nop(); | |
| 2999 | |
| 3000 // if (dst == NULL) return -1; | |
| 3001 __ br_null(dst, false, Assembler::pn, L_failed); | |
| 3002 | |
| 3003 // if (dst_pos < 0) return -1; | |
| 3004 __ delayed()->tst(dst_pos); | |
| 3005 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
| 3006 | |
| 3007 // if (length < 0) return -1; | |
| 3008 __ delayed()->tst(length); | |
| 3009 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
| 3010 | |
| 3011 BLOCK_COMMENT("arraycopy argument klass checks"); | |
| 3012 // get src->klass() | |
|
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3013 if (UseCompressedKlassPointers) { |
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3014 __ delayed()->nop(); // ??? not good |
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3015 __ load_klass(src, G3_src_klass); |
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3016 } else { |
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3017 __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass); |
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3018 } |
| 0 | 3019 |
| 3020 #ifdef ASSERT | |
| 3021 // assert(src->klass() != NULL); | |
| 3022 BLOCK_COMMENT("assert klasses not null"); | |
| 3023 { Label L_a, L_b; | |
| 3839 | 3024 __ br_notnull_short(G3_src_klass, Assembler::pt, L_b); // it is broken if klass is NULL |
| 0 | 3025 __ bind(L_a); |
| 3026 __ stop("broken null klass"); | |
| 3027 __ bind(L_b); | |
|
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3028 __ load_klass(dst, G4_dst_klass); |
| 0 | 3029 __ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also |
| 3030 __ delayed()->mov(G0, G4_dst_klass); // scribble the temp | |
| 3031 BLOCK_COMMENT("assert done"); | |
| 3032 } | |
| 3033 #endif | |
| 3034 | |
| 3035 // Load layout helper | |
| 3036 // | |
| 3037 // |array_tag| | header_size | element_type | |log2_element_size| | |
| 3038 // 32 30 24 16 8 2 0 | |
| 3039 // | |
| 3040 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
| 3041 // | |
| 3042 | |
|
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3043 int lh_offset = in_bytes(Klass::layout_helper_offset()); |
| 0 | 3044 |
| 3045 // Load 32-bits signed value. Use br() instruction with it to check icc. | |
| 3046 __ lduw(G3_src_klass, lh_offset, G5_lh); | |
| 3047 | |
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3048 if (UseCompressedKlassPointers) { |
|
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3049 __ load_klass(dst, G4_dst_klass); |
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3050 } |
| 0 | 3051 // Handle objArrays completely differently... |
| 3052 juint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
| 3053 __ set(objArray_lh, O5_temp); | |
| 3054 __ cmp(G5_lh, O5_temp); | |
| 3055 __ br(Assembler::equal, false, Assembler::pt, L_objArray); | |
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3056 if (UseCompressedKlassPointers) { |
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3057 __ delayed()->nop(); |
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3058 } else { |
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3059 __ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass); |
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3060 } |
| 0 | 3061 |
| 3062 // if (src->klass() != dst->klass()) return -1; | |
| 3839 | 3063 __ cmp_and_brx_short(G3_src_klass, G4_dst_klass, Assembler::notEqual, Assembler::pn, L_failed); |
| 0 | 3064 |
| 3065 // if (!src->is_Array()) return -1; | |
| 3066 __ cmp(G5_lh, Klass::_lh_neutral_value); // < 0 | |
| 3067 __ br(Assembler::greaterEqual, false, Assembler::pn, L_failed); | |
| 3068 | |
| 3069 // At this point, it is known to be a typeArray (array_tag 0x3). | |
| 3070 #ifdef ASSERT | |
| 3071 __ delayed()->nop(); | |
| 3072 { Label L; | |
| 3073 jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift); | |
| 3074 __ set(lh_prim_tag_in_place, O5_temp); | |
| 3075 __ cmp(G5_lh, O5_temp); | |
| 3076 __ br(Assembler::greaterEqual, false, Assembler::pt, L); | |
| 3077 __ delayed()->nop(); | |
| 3078 __ stop("must be a primitive array"); | |
| 3079 __ bind(L); | |
| 3080 } | |
| 3081 #else | |
| 3082 __ delayed(); // match next insn to prev branch | |
| 3083 #endif | |
| 3084 | |
| 3085 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
| 3086 O5_temp, G4_dst_klass, L_failed); | |
| 3087 | |
|
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3088 // TypeArrayKlass |
| 0 | 3089 // |
| 3090 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
| 3091 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
| 3092 // | |
| 3093 | |
| 3094 const Register G4_offset = G4_dst_klass; // array offset | |
| 3095 const Register G3_elsize = G3_src_klass; // log2 element size | |
| 3096 | |
| 3097 __ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset); | |
| 3098 __ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset | |
| 3099 __ add(src, G4_offset, src); // src array offset | |
| 3100 __ add(dst, G4_offset, dst); // dst array offset | |
| 3101 __ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size | |
| 3102 | |
| 3103 // next registers should be set before the jump to corresponding stub | |
| 3104 const Register from = O0; // source array address | |
| 3105 const Register to = O1; // destination array address | |
| 3106 const Register count = O2; // elements count | |
| 3107 | |
| 3108 // 'from', 'to', 'count' registers should be set in this order | |
| 3109 // since they are the same as 'src', 'src_pos', 'dst'. | |
| 3110 | |
| 3111 BLOCK_COMMENT("scale indexes to element size"); | |
| 3112 __ sll_ptr(src_pos, G3_elsize, src_pos); | |
| 3113 __ sll_ptr(dst_pos, G3_elsize, dst_pos); | |
| 3114 __ add(src, src_pos, from); // src_addr | |
| 3115 __ add(dst, dst_pos, to); // dst_addr | |
| 3116 | |
| 3117 BLOCK_COMMENT("choose copy loop based on element size"); | |
| 3118 __ cmp(G3_elsize, 0); | |
|
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3119 __ br(Assembler::equal, true, Assembler::pt, entry_jbyte_arraycopy); |
| 0 | 3120 __ delayed()->signx(length, count); // length |
| 3121 | |
| 3122 __ cmp(G3_elsize, LogBytesPerShort); | |
|
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3123 __ br(Assembler::equal, true, Assembler::pt, entry_jshort_arraycopy); |
| 0 | 3124 __ delayed()->signx(length, count); // length |
| 3125 | |
| 3126 __ cmp(G3_elsize, LogBytesPerInt); | |
|
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|
3127 __ br(Assembler::equal, true, Assembler::pt, entry_jint_arraycopy); |
| 0 | 3128 __ delayed()->signx(length, count); // length |
| 3129 #ifdef ASSERT | |
| 3130 { Label L; | |
| 3839 | 3131 __ cmp_and_br_short(G3_elsize, LogBytesPerLong, Assembler::equal, Assembler::pt, L); |
| 0 | 3132 __ stop("must be long copy, but elsize is wrong"); |
| 3133 __ bind(L); | |
| 3134 } | |
| 3135 #endif | |
|
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3136 __ br(Assembler::always, false, Assembler::pt, entry_jlong_arraycopy); |
| 0 | 3137 __ delayed()->signx(length, count); // length |
| 3138 | |
|
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3139 // ObjArrayKlass |
| 0 | 3140 __ BIND(L_objArray); |
| 3141 // live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length | |
| 3142 | |
| 3143 Label L_plain_copy, L_checkcast_copy; | |
| 3144 // test array classes for subtyping | |
| 3145 __ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality | |
| 3146 __ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy); | |
| 3147 __ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below | |
| 3148 | |
| 3149 // Identically typed arrays can be copied without element-wise checks. | |
| 3150 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
| 3151 O5_temp, G5_lh, L_failed); | |
| 3152 | |
| 3153 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
| 3154 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
|
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3155 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3156 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
| 0 | 3157 __ add(src, src_pos, from); // src_addr |
| 3158 __ add(dst, dst_pos, to); // dst_addr | |
| 3159 __ BIND(L_plain_copy); | |
|
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3160 __ br(Assembler::always, false, Assembler::pt, entry_oop_arraycopy); |
| 0 | 3161 __ delayed()->signx(length, count); // length |
| 3162 | |
| 3163 __ BIND(L_checkcast_copy); | |
| 3164 // live at this point: G3_src_klass, G4_dst_klass | |
| 3165 { | |
| 3166 // Before looking at dst.length, make sure dst is also an objArray. | |
| 3167 // lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot | |
| 3168 __ cmp(G5_lh, O5_temp); | |
| 3169 __ br(Assembler::notEqual, false, Assembler::pn, L_failed); | |
| 3170 | |
| 3171 // It is safe to examine both src.length and dst.length. | |
| 3172 __ delayed(); // match next insn to prev branch | |
| 3173 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
| 3174 O5_temp, G5_lh, L_failed); | |
| 3175 | |
| 3176 // Marshal the base address arguments now, freeing registers. | |
| 3177 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
| 3178 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3179 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3180 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
| 0 | 3181 __ add(src, src_pos, from); // src_addr |
| 3182 __ add(dst, dst_pos, to); // dst_addr | |
| 3183 __ signx(length, count); // length (reloaded) | |
| 3184 | |
| 3185 Register sco_temp = O3; // this register is free now | |
| 3186 assert_different_registers(from, to, count, sco_temp, | |
| 3187 G4_dst_klass, G3_src_klass); | |
| 3188 | |
| 3189 // Generate the type check. | |
|
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3190 int sco_offset = in_bytes(Klass::super_check_offset_offset()); |
| 0 | 3191 __ lduw(G4_dst_klass, sco_offset, sco_temp); |
| 3192 generate_type_check(G3_src_klass, sco_temp, G4_dst_klass, | |
| 3193 O5_temp, L_plain_copy); | |
| 3194 | |
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3195 // Fetch destination element klass from the ObjArrayKlass header. |
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3196 int ek_offset = in_bytes(ObjArrayKlass::element_klass_offset()); |
| 0 | 3197 |
| 3198 // the checkcast_copy loop needs two extra arguments: | |
| 3199 __ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass | |
| 3200 // lduw(O4, sco_offset, O3); // sco of elem klass | |
| 3201 | |
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3202 __ br(Assembler::always, false, Assembler::pt, entry_checkcast_arraycopy); |
| 0 | 3203 __ delayed()->lduw(O4, sco_offset, O3); |
| 3204 } | |
| 3205 | |
| 3206 __ BIND(L_failed); | |
| 3207 __ retl(); | |
| 3208 __ delayed()->sub(G0, 1, O0); // return -1 | |
| 3209 return start; | |
| 3210 } | |
| 3211 | |
| 3892 | 3212 // |
| 3213 // Generate stub for heap zeroing. | |
| 3214 // "to" address is aligned to jlong (8 bytes). | |
| 3215 // | |
| 3216 // Arguments for generated stub: | |
| 3217 // to: O0 | |
| 3218 // count: O1 treated as signed (count of HeapWord) | |
| 3219 // count could be 0 | |
| 3220 // | |
| 3221 address generate_zero_aligned_words(const char* name) { | |
| 3222 __ align(CodeEntryAlignment); | |
| 3223 StubCodeMark mark(this, "StubRoutines", name); | |
| 3224 address start = __ pc(); | |
| 3225 | |
| 3226 const Register to = O0; // source array address | |
| 3227 const Register count = O1; // HeapWords count | |
| 3228 const Register temp = O2; // scratch | |
| 3229 | |
| 3230 Label Ldone; | |
| 3231 __ sllx(count, LogHeapWordSize, count); // to bytes count | |
| 3232 // Use BIS for zeroing | |
| 3233 __ bis_zeroing(to, count, temp, Ldone); | |
| 3234 __ bind(Ldone); | |
| 3235 __ retl(); | |
| 3236 __ delayed()->nop(); | |
| 3237 return start; | |
| 3238 } | |
| 3239 | |
| 0 | 3240 void generate_arraycopy_stubs() { |
|
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3241 address entry; |
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3242 address entry_jbyte_arraycopy; |
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3243 address entry_jshort_arraycopy; |
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3244 address entry_jint_arraycopy; |
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3245 address entry_oop_arraycopy; |
|
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3246 address entry_jlong_arraycopy; |
|
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3247 address entry_checkcast_arraycopy; |
|
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3248 |
| 2324 | 3249 //*** jbyte |
| 3250 // Always need aligned and unaligned versions | |
| 3251 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, &entry, | |
| 3252 "jbyte_disjoint_arraycopy"); | |
| 3253 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, entry, | |
| 3254 &entry_jbyte_arraycopy, | |
| 3255 "jbyte_arraycopy"); | |
| 3256 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, &entry, | |
| 3257 "arrayof_jbyte_disjoint_arraycopy"); | |
| 3258 StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, entry, NULL, | |
| 3259 "arrayof_jbyte_arraycopy"); | |
| 3260 | |
| 3261 //*** jshort | |
| 3262 // Always need aligned and unaligned versions | |
| 3263 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, &entry, | |
| 3264 "jshort_disjoint_arraycopy"); | |
| 3265 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, entry, | |
| 3266 &entry_jshort_arraycopy, | |
| 3267 "jshort_arraycopy"); | |
|
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|
3268 StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, &entry, |
|
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|
3269 "arrayof_jshort_disjoint_arraycopy"); |
|
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diff
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3270 StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, entry, NULL, |
|
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|
3271 "arrayof_jshort_arraycopy"); |
|
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|
3272 |
| 2324 | 3273 //*** jint |
| 3274 // Aligned versions | |
| 3275 StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, &entry, | |
| 3276 "arrayof_jint_disjoint_arraycopy"); | |
| 3277 StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, entry, &entry_jint_arraycopy, | |
| 3278 "arrayof_jint_arraycopy"); | |
| 0 | 3279 #ifdef _LP64 |
| 2324 | 3280 // In 64 bit we need both aligned and unaligned versions of jint arraycopy. |
| 3281 // entry_jint_arraycopy always points to the unaligned version (notice that we overwrite it). | |
| 3282 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, &entry, | |
| 3283 "jint_disjoint_arraycopy"); | |
| 3284 StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, entry, | |
| 3285 &entry_jint_arraycopy, | |
| 3286 "jint_arraycopy"); | |
| 3287 #else | |
| 3288 // In 32 bit jints are always HeapWordSize aligned, so always use the aligned version | |
| 3289 // (in fact in 32bit we always have a pre-loop part even in the aligned version, | |
| 3290 // because it uses 64-bit loads/stores, so the aligned flag is actually ignored). | |
| 3291 StubRoutines::_jint_disjoint_arraycopy = StubRoutines::_arrayof_jint_disjoint_arraycopy; | |
| 3292 StubRoutines::_jint_arraycopy = StubRoutines::_arrayof_jint_arraycopy; | |
| 0 | 3293 #endif |
|
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|
3294 |
| 2324 | 3295 |
| 3296 //*** jlong | |
| 3297 // It is always aligned | |
| 3298 StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, &entry, | |
| 3299 "arrayof_jlong_disjoint_arraycopy"); | |
| 3300 StubRoutines::_arrayof_jlong_arraycopy = generate_conjoint_long_copy(true, entry, &entry_jlong_arraycopy, | |
| 3301 "arrayof_jlong_arraycopy"); | |
| 3302 StubRoutines::_jlong_disjoint_arraycopy = StubRoutines::_arrayof_jlong_disjoint_arraycopy; | |
| 3303 StubRoutines::_jlong_arraycopy = StubRoutines::_arrayof_jlong_arraycopy; | |
| 3304 | |
| 3305 | |
| 3306 //*** oops | |
| 3307 // Aligned versions | |
| 3308 StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, &entry, | |
| 3309 "arrayof_oop_disjoint_arraycopy"); | |
| 3310 StubRoutines::_arrayof_oop_arraycopy = generate_conjoint_oop_copy(true, entry, &entry_oop_arraycopy, | |
| 3311 "arrayof_oop_arraycopy"); | |
| 3312 // Aligned versions without pre-barriers | |
| 3313 StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(true, &entry, | |
| 3314 "arrayof_oop_disjoint_arraycopy_uninit", | |
| 3315 /*dest_uninitialized*/true); | |
| 3316 StubRoutines::_arrayof_oop_arraycopy_uninit = generate_conjoint_oop_copy(true, entry, NULL, | |
| 3317 "arrayof_oop_arraycopy_uninit", | |
| 3318 /*dest_uninitialized*/true); | |
| 3319 #ifdef _LP64 | |
| 3320 if (UseCompressedOops) { | |
| 3321 // With compressed oops we need unaligned versions, notice that we overwrite entry_oop_arraycopy. | |
| 3322 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, &entry, | |
| 3323 "oop_disjoint_arraycopy"); | |
| 3324 StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, entry, &entry_oop_arraycopy, | |
| 3325 "oop_arraycopy"); | |
| 3326 // Unaligned versions without pre-barriers | |
| 3327 StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(false, &entry, | |
| 3328 "oop_disjoint_arraycopy_uninit", | |
| 3329 /*dest_uninitialized*/true); | |
| 3330 StubRoutines::_oop_arraycopy_uninit = generate_conjoint_oop_copy(false, entry, NULL, | |
| 3331 "oop_arraycopy_uninit", | |
| 3332 /*dest_uninitialized*/true); | |
| 3333 } else | |
| 3334 #endif | |
| 3335 { | |
| 3336 // oop arraycopy is always aligned on 32bit and 64bit without compressed oops | |
| 3337 StubRoutines::_oop_disjoint_arraycopy = StubRoutines::_arrayof_oop_disjoint_arraycopy; | |
| 3338 StubRoutines::_oop_arraycopy = StubRoutines::_arrayof_oop_arraycopy; | |
| 3339 StubRoutines::_oop_disjoint_arraycopy_uninit = StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit; | |
| 3340 StubRoutines::_oop_arraycopy_uninit = StubRoutines::_arrayof_oop_arraycopy_uninit; | |
| 3341 } | |
| 3342 | |
| 3343 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); | |
| 3344 StubRoutines::_checkcast_arraycopy_uninit = generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, | |
| 3345 /*dest_uninitialized*/true); | |
| 3346 | |
|
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|
3347 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy", |
|
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diff
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|
3348 entry_jbyte_arraycopy, |
|
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diff
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|
3349 entry_jshort_arraycopy, |
|
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diff
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|
3350 entry_jint_arraycopy, |
|
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diff
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|
3351 entry_jlong_arraycopy); |
|
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diff
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|
3352 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy", |
|
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diff
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|
3353 entry_jbyte_arraycopy, |
|
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diff
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|
3354 entry_jshort_arraycopy, |
|
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diff
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|
3355 entry_jint_arraycopy, |
|
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diff
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|
3356 entry_oop_arraycopy, |
|
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|
3357 entry_jlong_arraycopy, |
|
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|
3358 entry_checkcast_arraycopy); |
| 1763 | 3359 |
| 3360 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); | |
| 3361 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
| 3362 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
| 3363 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
| 3364 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
| 3365 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
| 3892 | 3366 |
| 3367 if (UseBlockZeroing) { | |
| 3368 StubRoutines::_zero_aligned_words = generate_zero_aligned_words("zero_aligned_words"); | |
| 3369 } | |
| 0 | 3370 } |
| 3371 | |
| 3372 void generate_initial() { | |
| 3373 // Generates all stubs and initializes the entry points | |
| 3374 | |
| 3375 //------------------------------------------------------------------------------------------------------------------------ | |
| 3376 // entry points that exist in all platforms | |
| 3377 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
| 3378 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
| 3379 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
| 3380 | |
| 3381 StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); | |
| 3382 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
| 3383 | |
| 3384 //------------------------------------------------------------------------------------------------------------------------ | |
| 3385 // entry points that are platform specific | |
| 3386 StubRoutines::Sparc::_test_stop_entry = generate_test_stop(); | |
| 3387 | |
| 3388 StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine(); | |
| 3389 StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows(); | |
| 3390 | |
| 3391 #if !defined(COMPILER2) && !defined(_LP64) | |
| 3392 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
| 3393 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
| 3394 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
| 3395 StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry; | |
| 3396 StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry; | |
| 3397 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
| 3398 StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry; | |
| 3399 #endif // COMPILER2 !=> _LP64 | |
|
3451
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2324
diff
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|
3400 |
| 4743 | 3401 // Build this early so it's available for the interpreter. |
| 3402 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError)); | |
| 0 | 3403 } |
| 3404 | |
| 3405 | |
| 3406 void generate_all() { | |
| 3407 // Generates all stubs and initializes the entry points | |
| 3408 | |
|
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660978a2a31a
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422
diff
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|
3409 // Generate partial_subtype_check first here since its code depends on |
|
660978a2a31a
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diff
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|
3410 // UseZeroBaseCompressedOops which is defined after heap initialization. |
|
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diff
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|
3411 StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check(); |
| 0 | 3412 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
| 3937 | 3413 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError)); |
| 3414 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError)); | |
|
10479
40b8c383bc31
Throw InvalidInstalledCodeException directly in the stubs.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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7212
diff
changeset
|
3415 StubRoutines::_throw_InvalidInstalledCodeException_entry= generate_throw_exception("InvalidInstalledCodeException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_InvalidInstalledCodeException)); |
| 3937 | 3416 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call)); |
| 0 | 3417 |
| 3418 StubRoutines::_handler_for_unsafe_access_entry = | |
| 3419 generate_handler_for_unsafe_access(); | |
| 3420 | |
| 3421 // support for verify_oop (must happen after universe_init) | |
| 3422 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); | |
| 3423 | |
| 3424 // arraycopy stubs used by compilers | |
| 3425 generate_arraycopy_stubs(); | |
|
1174
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|
3426 |
|
ddb7834449d0
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727
diff
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|
3427 // Don't initialize the platform math functions since sparc |
|
ddb7834449d0
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diff
changeset
|
3428 // doesn't have intrinsics for these operations. |
| 0 | 3429 } |
| 3430 | |
| 3431 | |
| 3432 public: | |
| 3433 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
| 3434 // replace the standard masm with a special one: | |
| 3435 _masm = new MacroAssembler(code); | |
| 3436 | |
| 3437 _stub_count = !all ? 0x100 : 0x200; | |
| 3438 if (all) { | |
| 3439 generate_all(); | |
| 3440 } else { | |
| 3441 generate_initial(); | |
| 3442 } | |
| 3443 | |
| 3444 // make sure this stub is available for all local calls | |
| 3445 if (_atomic_add_stub.is_unbound()) { | |
| 3446 // generate a second time, if necessary | |
| 3447 (void) generate_atomic_add(); | |
| 3448 } | |
| 3449 } | |
| 3450 | |
| 3451 | |
| 3452 private: | |
| 3453 int _stub_count; | |
| 3454 void stub_prolog(StubCodeDesc* cdesc) { | |
| 3455 # ifdef ASSERT | |
| 3456 // put extra information in the stub code, to make it more readable | |
| 3457 #ifdef _LP64 | |
| 3458 // Write the high part of the address | |
| 3459 // [RGV] Check if there is a dependency on the size of this prolog | |
| 3460 __ emit_data((intptr_t)cdesc >> 32, relocInfo::none); | |
| 3461 #endif | |
| 3462 __ emit_data((intptr_t)cdesc, relocInfo::none); | |
| 3463 __ emit_data(++_stub_count, relocInfo::none); | |
| 3464 # endif | |
| 3465 align(true); | |
| 3466 } | |
| 3467 | |
| 3468 void align(bool at_header = false) { | |
| 3469 // %%%%% move this constant somewhere else | |
| 3470 // UltraSPARC cache line size is 8 instructions: | |
| 3471 const unsigned int icache_line_size = 32; | |
| 3472 const unsigned int icache_half_line_size = 16; | |
| 3473 | |
| 3474 if (at_header) { | |
| 3475 while ((intptr_t)(__ pc()) % icache_line_size != 0) { | |
| 3476 __ emit_data(0, relocInfo::none); | |
| 3477 } | |
| 3478 } else { | |
| 3479 while ((intptr_t)(__ pc()) % icache_half_line_size != 0) { | |
| 3480 __ nop(); | |
| 3481 } | |
| 3482 } | |
| 3483 } | |
| 3484 | |
| 3485 }; // end class declaration | |
| 3486 | |
| 3487 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
| 3488 StubGenerator g(code, all); | |
| 3489 } |