1 /* 2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "c1/c1_CodeStubs.hpp" 27 #include "c1/c1_FrameMap.hpp" 28 #include "c1/c1_LIRAssembler.hpp" 29 #include "c1/c1_MacroAssembler.hpp" 30 #include "c1/c1_Runtime1.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "nativeInst_x86.hpp" 33 #include "oops/objArrayKlass.hpp" 34 #include "runtime/sharedRuntime.hpp" 35 #include "utilities/align.hpp" 36 #include "utilities/macros.hpp" 37 #include "vmreg_x86.inline.hpp" 38 39 40 #define __ ce->masm()-> 41 42 #ifndef _LP64 43 float ConversionStub::float_zero = 0.0; 44 double ConversionStub::double_zero = 0.0; 45 46 void ConversionStub::emit_code(LIR_Assembler* ce) { 47 __ bind(_entry); 48 assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub"); 49 50 51 if (input()->is_single_xmm()) { 52 __ comiss(input()->as_xmm_float_reg(), 53 ExternalAddress((address)&float_zero)); 54 } else if (input()->is_double_xmm()) { 55 __ comisd(input()->as_xmm_double_reg(), 56 ExternalAddress((address)&double_zero)); 57 } else { 58 __ push(rax); 59 __ ftst(); 60 __ fnstsw_ax(); 61 __ sahf(); 62 __ pop(rax); 63 } 64 65 Label NaN, do_return; 66 __ jccb(Assembler::parity, NaN); 67 __ jccb(Assembler::below, do_return); 68 69 // input is > 0 -> return maxInt 70 // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff 71 __ decrement(result()->as_register()); 72 __ jmpb(do_return); 73 74 // input is NaN -> return 0 75 __ bind(NaN); 76 __ xorptr(result()->as_register(), result()->as_register()); 77 78 __ bind(do_return); 79 __ jmp(_continuation); 80 } 81 #endif // !_LP64 82 83 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) { 84 __ bind(_entry); 85 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset()); 86 #ifdef _LP64 87 __ lea(rscratch1, safepoint_pc); 88 __ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1); 89 #else 90 const Register tmp1 = rcx; 91 const Register tmp2 = rdx; 92 __ push(tmp1); 93 __ push(tmp2); 94 95 __ lea(tmp1, safepoint_pc); 96 __ get_thread(tmp2); 97 __ movptr(Address(tmp2, JavaThread::saved_exception_pc_offset()), tmp1); 98 99 __ pop(tmp2); 100 __ pop(tmp1); 101 #endif /* _LP64 */ 102 assert(SharedRuntime::polling_page_return_handler_blob() != nullptr, 103 "polling page return stub not created yet"); 104 105 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); 106 __ jump(RuntimeAddress(stub)); 107 } 108 109 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 110 __ bind(_entry); 111 Metadata *m = _method->as_constant_ptr()->as_metadata(); 112 ce->store_parameter(m, 1); 113 ce->store_parameter(_bci, 0); 114 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id))); 115 ce->add_call_info_here(_info); 116 ce->verify_oop_map(_info); 117 __ jmp(_continuation); 118 } 119 120 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 121 __ bind(_entry); 122 if (_info->deoptimize_on_exception()) { 123 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 124 __ call(RuntimeAddress(a)); 125 ce->add_call_info_here(_info); 126 ce->verify_oop_map(_info); 127 debug_only(__ should_not_reach_here()); 128 return; 129 } 130 131 // pass the array index on stack because all registers must be preserved 132 if (_index->is_cpu_register()) { 133 ce->store_parameter(_index->as_register(), 0); 134 } else { 135 ce->store_parameter(_index->as_jint(), 0); 136 } 137 Runtime1::StubID stub_id; 138 if (_throw_index_out_of_bounds_exception) { 139 stub_id = Runtime1::throw_index_exception_id; 140 } else { 141 stub_id = Runtime1::throw_range_check_failed_id; 142 ce->store_parameter(_array->as_pointer_register(), 1); 143 } 144 __ call(RuntimeAddress(Runtime1::entry_for(stub_id))); 145 ce->add_call_info_here(_info); 146 ce->verify_oop_map(_info); 147 debug_only(__ should_not_reach_here()); 148 } 149 150 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 151 _info = new CodeEmitInfo(info); 152 } 153 154 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { 155 __ bind(_entry); 156 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 157 __ call(RuntimeAddress(a)); 158 ce->add_call_info_here(_info); 159 ce->verify_oop_map(_info); 160 debug_only(__ should_not_reach_here()); 161 } 162 163 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 164 if (_offset != -1) { 165 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 166 } 167 __ bind(_entry); 168 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id))); 169 ce->add_call_info_here(_info); 170 debug_only(__ should_not_reach_here()); 171 } 172 173 174 // Implementation of LoadFlattenedArrayStub 175 176 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { 177 _array = array; 178 _index = index; 179 _result = result; 180 // Tell the register allocator that the runtime call will scratch rax. 181 _scratch_reg = FrameMap::rax_oop_opr; 182 _info = new CodeEmitInfo(info); 183 } 184 185 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) { 186 assert(__ rsp_offset() == 0, "frame size should be fixed"); 187 __ bind(_entry); 188 ce->store_parameter(_array->as_register(), 1); 189 ce->store_parameter(_index->as_register(), 0); 190 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flat_array_id))); 191 ce->add_call_info_here(_info); 192 ce->verify_oop_map(_info); 193 if (_result->as_register() != rax) { 194 __ movptr(_result->as_register(), rax); 195 } 196 __ jmp(_continuation); 197 } 198 199 200 // Implementation of StoreFlattenedArrayStub 201 202 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) { 203 _array = array; 204 _index = index; 205 _value = value; 206 // Tell the register allocator that the runtime call will scratch rax. 207 _scratch_reg = FrameMap::rax_oop_opr; 208 _info = new CodeEmitInfo(info); 209 } 210 211 212 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) { 213 assert(__ rsp_offset() == 0, "frame size should be fixed"); 214 __ bind(_entry); 215 ce->store_parameter(_array->as_register(), 2); 216 ce->store_parameter(_index->as_register(), 1); 217 ce->store_parameter(_value->as_register(), 0); 218 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flat_array_id))); 219 ce->add_call_info_here(_info); 220 ce->verify_oop_map(_info); 221 __ jmp(_continuation); 222 } 223 224 225 // Implementation of SubstitutabilityCheckStub 226 227 SubstitutabilityCheckStub::SubstitutabilityCheckStub(LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { 228 _left = left; 229 _right = right; 230 // Tell the register allocator that the runtime call will scratch rax. 231 _scratch_reg = FrameMap::rax_oop_opr; 232 _info = new CodeEmitInfo(info); 233 } 234 235 void SubstitutabilityCheckStub::emit_code(LIR_Assembler* ce) { 236 assert(__ rsp_offset() == 0, "frame size should be fixed"); 237 __ bind(_entry); 238 ce->store_parameter(_left->as_register(), 1); 239 ce->store_parameter(_right->as_register(), 0); 240 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::substitutability_check_id))); 241 ce->add_call_info_here(_info); 242 ce->verify_oop_map(_info); 243 __ jmp(_continuation); 244 } 245 246 247 // Implementation of NewInstanceStub 248 249 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 250 _result = result; 251 _klass = klass; 252 _klass_reg = klass_reg; 253 _info = new CodeEmitInfo(info); 254 assert(stub_id == Runtime1::new_instance_id || 255 stub_id == Runtime1::fast_new_instance_id || 256 stub_id == Runtime1::fast_new_instance_init_check_id, 257 "need new_instance id"); 258 _stub_id = stub_id; 259 } 260 261 262 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 263 assert(__ rsp_offset() == 0, "frame size should be fixed"); 264 __ bind(_entry); 265 __ movptr(rdx, _klass_reg->as_register()); 266 __ call(RuntimeAddress(Runtime1::entry_for(_stub_id))); 267 ce->add_call_info_here(_info); 268 ce->verify_oop_map(_info); 269 assert(_result->as_register() == rax, "result must in rax,"); 270 __ jmp(_continuation); 271 } 272 273 274 // Implementation of NewTypeArrayStub 275 276 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 277 _klass_reg = klass_reg; 278 _length = length; 279 _result = result; 280 _info = new CodeEmitInfo(info); 281 } 282 283 284 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 285 assert(__ rsp_offset() == 0, "frame size should be fixed"); 286 __ bind(_entry); 287 assert(_length->as_register() == rbx, "length must in rbx,"); 288 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); 289 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id))); 290 ce->add_call_info_here(_info); 291 ce->verify_oop_map(_info); 292 assert(_result->as_register() == rax, "result must in rax,"); 293 __ jmp(_continuation); 294 } 295 296 297 // Implementation of NewObjectArrayStub 298 299 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, 300 CodeEmitInfo* info, bool is_null_free) { 301 _klass_reg = klass_reg; 302 _result = result; 303 _length = length; 304 _info = new CodeEmitInfo(info); 305 _is_null_free = is_null_free; 306 } 307 308 309 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 310 assert(__ rsp_offset() == 0, "frame size should be fixed"); 311 __ bind(_entry); 312 assert(_length->as_register() == rbx, "length must in rbx,"); 313 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); 314 if (_is_null_free) { 315 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_null_free_array_id))); 316 } else { 317 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id))); 318 } 319 ce->add_call_info_here(_info); 320 ce->verify_oop_map(_info); 321 assert(_result->as_register() == rax, "result must in rax,"); 322 __ jmp(_continuation); 323 } 324 325 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 326 assert(__ rsp_offset() == 0, "frame size should be fixed"); 327 __ bind(_entry); 328 if (_throw_ie_stub != nullptr) { 329 // When we come here, _obj_reg has already been checked to be non-null. 330 const int is_value_mask = markWord::inline_type_pattern; 331 Register mark = _scratch_reg->as_register(); 332 __ movptr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes())); 333 __ andptr(mark, is_value_mask); 334 __ cmpl(mark, is_value_mask); 335 __ jcc(Assembler::equal, *_throw_ie_stub->entry()); 336 } 337 ce->store_parameter(_obj_reg->as_register(), 1); 338 ce->store_parameter(_lock_reg->as_register(), 0); 339 Runtime1::StubID enter_id; 340 if (ce->compilation()->has_fpu_code()) { 341 enter_id = Runtime1::monitorenter_id; 342 } else { 343 enter_id = Runtime1::monitorenter_nofpu_id; 344 } 345 __ call(RuntimeAddress(Runtime1::entry_for(enter_id))); 346 ce->add_call_info_here(_info); 347 ce->verify_oop_map(_info); 348 __ jmp(_continuation); 349 } 350 351 352 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 353 __ bind(_entry); 354 if (_compute_lock) { 355 // lock_reg was destroyed by fast unlocking attempt => recompute it 356 ce->monitor_address(_monitor_ix, _lock_reg); 357 } 358 ce->store_parameter(_lock_reg->as_register(), 0); 359 // note: non-blocking leaf routine => no call info needed 360 Runtime1::StubID exit_id; 361 if (ce->compilation()->has_fpu_code()) { 362 exit_id = Runtime1::monitorexit_id; 363 } else { 364 exit_id = Runtime1::monitorexit_nofpu_id; 365 } 366 __ call(RuntimeAddress(Runtime1::entry_for(exit_id))); 367 __ jmp(_continuation); 368 } 369 370 371 // Implementation of patching: 372 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) 373 // - Replace original code with a call to the stub 374 // At Runtime: 375 // - call to stub, jump to runtime 376 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object) 377 // - in runtime: after initializing class, restore original code, reexecute instruction 378 379 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; 380 381 void PatchingStub::align_patch_site(MacroAssembler* masm) { 382 // We're patching a 5-7 byte instruction on intel and we need to 383 // make sure that we don't see a piece of the instruction. It 384 // appears mostly impossible on Intel to simply invalidate other 385 // processors caches and since they may do aggressive prefetch it's 386 // very hard to make a guess about what code might be in the icache. 387 // Force the instruction to be double word aligned so that it 388 // doesn't span a cache line. 389 masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize)); 390 } 391 392 void PatchingStub::emit_code(LIR_Assembler* ce) { 393 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call"); 394 395 Label call_patch; 396 397 // static field accesses have special semantics while the class 398 // initializer is being run so we emit a test which can be used to 399 // check that this code is being executed by the initializing 400 // thread. 401 address being_initialized_entry = __ pc(); 402 if (CommentedAssembly) { 403 __ block_comment(" patch template"); 404 } 405 if (_id == load_klass_id) { 406 // produce a copy of the load klass instruction for use by the being initialized case 407 #ifdef ASSERT 408 address start = __ pc(); 409 #endif 410 Metadata* o = nullptr; 411 __ mov_metadata(_obj, o); 412 #ifdef ASSERT 413 for (int i = 0; i < _bytes_to_copy; i++) { 414 address ptr = (address)(_pc_start + i); 415 int a_byte = (*ptr) & 0xFF; 416 assert(a_byte == *start++, "should be the same code"); 417 } 418 #endif 419 } else if (_id == load_mirror_id) { 420 // produce a copy of the load mirror instruction for use by the being 421 // initialized case 422 #ifdef ASSERT 423 address start = __ pc(); 424 #endif 425 jobject o = nullptr; 426 __ movoop(_obj, o); 427 #ifdef ASSERT 428 for (int i = 0; i < _bytes_to_copy; i++) { 429 address ptr = (address)(_pc_start + i); 430 int a_byte = (*ptr) & 0xFF; 431 assert(a_byte == *start++, "should be the same code"); 432 } 433 #endif 434 } else { 435 // make a copy the code which is going to be patched. 436 for (int i = 0; i < _bytes_to_copy; i++) { 437 address ptr = (address)(_pc_start + i); 438 int a_byte = (*ptr) & 0xFF; 439 __ emit_int8(a_byte); 440 *ptr = 0x90; // make the site look like a nop 441 } 442 } 443 444 address end_of_patch = __ pc(); 445 int bytes_to_skip = 0; 446 if (_id == load_mirror_id) { 447 int offset = __ offset(); 448 if (CommentedAssembly) { 449 __ block_comment(" being_initialized check"); 450 } 451 assert(_obj != noreg, "must be a valid register"); 452 Register tmp = rax; 453 Register tmp2 = rbx; 454 __ push(tmp); 455 __ push(tmp2); 456 // Load without verification to keep code size small. We need it because 457 // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null. 458 __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset())); 459 __ get_thread(tmp); 460 __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset())); 461 __ pop(tmp2); 462 __ pop(tmp); 463 __ jcc(Assembler::notEqual, call_patch); 464 465 // access_field patches may execute the patched code before it's 466 // copied back into place so we need to jump back into the main 467 // code of the nmethod to continue execution. 468 __ jmp(_patch_site_continuation); 469 470 // make sure this extra code gets skipped 471 bytes_to_skip += __ offset() - offset; 472 } 473 if (CommentedAssembly) { 474 __ block_comment("patch data encoded as movl"); 475 } 476 // Now emit the patch record telling the runtime how to find the 477 // pieces of the patch. We only need 3 bytes but for readability of 478 // the disassembly we make the data look like a movl reg, imm32, 479 // which requires 5 bytes 480 int sizeof_patch_record = 5; 481 bytes_to_skip += sizeof_patch_record; 482 483 // emit the offsets needed to find the code to patch 484 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record; 485 486 __ emit_int8((unsigned char)0xB8); 487 __ emit_int8(0); 488 __ emit_int8(being_initialized_entry_offset); 489 __ emit_int8(bytes_to_skip); 490 __ emit_int8(_bytes_to_copy); 491 address patch_info_pc = __ pc(); 492 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 493 494 address entry = __ pc(); 495 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 496 address target = nullptr; 497 relocInfo::relocType reloc_type = relocInfo::none; 498 switch (_id) { 499 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 500 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; 501 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; 502 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; 503 default: ShouldNotReachHere(); 504 } 505 __ bind(call_patch); 506 507 if (CommentedAssembly) { 508 __ block_comment("patch entry point"); 509 } 510 __ call(RuntimeAddress(target)); 511 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 512 ce->add_call_info_here(_info); 513 int jmp_off = __ offset(); 514 __ jmp(_patch_site_entry); 515 // Add enough nops so deoptimization can overwrite the jmp above with a call 516 // and not destroy the world. We cannot use fat nops here, since the concurrent 517 // code rewrite may transiently create the illegal instruction sequence. 518 for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) { 519 __ nop(); 520 } 521 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { 522 CodeSection* cs = __ code_section(); 523 RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1)); 524 relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none); 525 } 526 } 527 528 529 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 530 __ bind(_entry); 531 ce->store_parameter(_trap_request, 0); 532 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id))); 533 ce->add_call_info_here(_info); 534 DEBUG_ONLY(__ should_not_reach_here()); 535 } 536 537 538 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 539 address a; 540 if (_info->deoptimize_on_exception()) { 541 // Deoptimize, do not throw the exception, because it is probably wrong to do it here. 542 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 543 } else { 544 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); 545 } 546 547 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 548 __ bind(_entry); 549 __ call(RuntimeAddress(a)); 550 ce->add_call_info_here(_info); 551 ce->verify_oop_map(_info); 552 debug_only(__ should_not_reach_here()); 553 } 554 555 556 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 557 assert(__ rsp_offset() == 0, "frame size should be fixed"); 558 559 __ bind(_entry); 560 // pass the object on stack because all registers must be preserved 561 if (_obj->is_cpu_register()) { 562 ce->store_parameter(_obj->as_register(), 0); 563 } 564 __ call(RuntimeAddress(Runtime1::entry_for(_stub))); 565 ce->add_call_info_here(_info); 566 debug_only(__ should_not_reach_here()); 567 } 568 569 570 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 571 //---------------slow case: call to native----------------- 572 __ bind(_entry); 573 // Figure out where the args should go 574 // This should really convert the IntrinsicID to the Method* and signature 575 // but I don't know how to do that. 576 // 577 VMRegPair args[5]; 578 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT}; 579 SharedRuntime::java_calling_convention(signature, args, 5); 580 581 // push parameters 582 // (src, src_pos, dest, destPos, length) 583 Register r[5]; 584 r[0] = src()->as_register(); 585 r[1] = src_pos()->as_register(); 586 r[2] = dst()->as_register(); 587 r[3] = dst_pos()->as_register(); 588 r[4] = length()->as_register(); 589 590 // next registers will get stored on the stack 591 for (int i = 0; i < 5 ; i++ ) { 592 VMReg r_1 = args[i].first(); 593 if (r_1->is_stack()) { 594 int st_off = r_1->reg2stack() * wordSize; 595 __ movptr (Address(rsp, st_off), r[i]); 596 } else { 597 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg "); 598 } 599 } 600 601 ce->align_call(lir_static_call); 602 603 ce->emit_static_call_stub(); 604 if (ce->compilation()->bailed_out()) { 605 return; // CodeCache is full 606 } 607 AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(), 608 relocInfo::static_call_type); 609 __ call(resolve); 610 ce->add_call_info_here(info()); 611 612 #ifndef PRODUCT 613 if (PrintC1Statistics) { 614 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt), rscratch1); 615 } 616 #endif 617 618 __ jmp(_continuation); 619 } 620 621 #undef __