1 /* 2 * Copyright (c) 1997, 2016, 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 "asm/macroAssembler.hpp" 27 #include "interpreter/interpreter.hpp" 28 #include "interpreter/interpreterRuntime.hpp" 29 #include "interpreter/interp_masm.hpp" 30 #include "interpreter/templateTable.hpp" 31 #include "memory/universe.inline.hpp" 32 #include "oops/methodData.hpp" 33 #include "oops/objArrayKlass.hpp" 34 #include "oops/oop.inline.hpp" 35 #include "prims/methodHandles.hpp" 36 #include "runtime/sharedRuntime.hpp" 37 #include "runtime/stubRoutines.hpp" 38 #include "runtime/synchronizer.hpp" 39 #include "utilities/macros.hpp" 40 41 #define __ _masm-> 42 43 // Global Register Names 44 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi); 45 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi); 46 47 // Platform-dependent initialization 48 void TemplateTable::pd_initialize() { 49 // No x86 specific initialization 50 } 51 52 // Address Computation: local variables 53 static inline Address iaddress(int n) { 54 return Address(rlocals, Interpreter::local_offset_in_bytes(n)); 55 } 56 57 static inline Address laddress(int n) { 58 return iaddress(n + 1); 59 } 60 61 #ifndef _LP64 62 static inline Address haddress(int n) { 63 return iaddress(n + 0); 64 } 65 #endif 66 67 static inline Address faddress(int n) { 68 return iaddress(n); 69 } 70 71 static inline Address daddress(int n) { 72 return laddress(n); 73 } 74 75 static inline Address aaddress(int n) { 76 return iaddress(n); 77 } 78 79 static inline Address iaddress(Register r) { 80 return Address(rlocals, r, Address::times_ptr); 81 } 82 83 static inline Address laddress(Register r) { 84 return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1)); 85 } 86 87 #ifndef _LP64 88 static inline Address haddress(Register r) { 89 return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0)); 90 } 91 #endif 92 93 static inline Address faddress(Register r) { 94 return iaddress(r); 95 } 96 97 static inline Address daddress(Register r) { 98 return laddress(r); 99 } 100 101 static inline Address aaddress(Register r) { 102 return iaddress(r); 103 } 104 105 106 // expression stack 107 // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store 108 // data beyond the rsp which is potentially unsafe in an MT environment; 109 // an interrupt may overwrite that data.) 110 static inline Address at_rsp () { 111 return Address(rsp, 0); 112 } 113 114 // At top of Java expression stack which may be different than esp(). It 115 // isn't for category 1 objects. 116 static inline Address at_tos () { 117 return Address(rsp, Interpreter::expr_offset_in_bytes(0)); 118 } 119 120 static inline Address at_tos_p1() { 121 return Address(rsp, Interpreter::expr_offset_in_bytes(1)); 122 } 123 124 static inline Address at_tos_p2() { 125 return Address(rsp, Interpreter::expr_offset_in_bytes(2)); 126 } 127 128 // Condition conversion 129 static Assembler::Condition j_not(TemplateTable::Condition cc) { 130 switch (cc) { 131 case TemplateTable::equal : return Assembler::notEqual; 132 case TemplateTable::not_equal : return Assembler::equal; 133 case TemplateTable::less : return Assembler::greaterEqual; 134 case TemplateTable::less_equal : return Assembler::greater; 135 case TemplateTable::greater : return Assembler::lessEqual; 136 case TemplateTable::greater_equal: return Assembler::less; 137 } 138 ShouldNotReachHere(); 139 return Assembler::zero; 140 } 141 142 143 144 // Miscelaneous helper routines 145 // Store an oop (or NULL) at the address described by obj. 146 // If val == noreg this means store a NULL 147 148 149 static void do_oop_store(InterpreterMacroAssembler* _masm, 150 Address obj, 151 Register val, 152 BarrierSet::Name barrier, 153 bool precise) { 154 assert(val == noreg || val == rax, "parameter is just for looks"); 155 switch (barrier) { 156 #if INCLUDE_ALL_GCS 157 case BarrierSet::G1SATBCTLogging: 158 { 159 // flatten object address if needed 160 // We do it regardless of precise because we need the registers 161 if (obj.index() == noreg && obj.disp() == 0) { 162 if (obj.base() != rdx) { 163 __ movptr(rdx, obj.base()); 164 } 165 } else { 166 __ lea(rdx, obj); 167 } 168 169 Register rtmp = LP64_ONLY(r8) NOT_LP64(rsi); 170 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 171 172 NOT_LP64(__ get_thread(rcx)); 173 NOT_LP64(__ save_bcp()); 174 175 __ g1_write_barrier_pre(rdx /* obj */, 176 rbx /* pre_val */, 177 rthread /* thread */, 178 rtmp /* tmp */, 179 val != noreg /* tosca_live */, 180 false /* expand_call */); 181 if (val == noreg) { 182 __ store_heap_oop_null(Address(rdx, 0)); 183 } else { 184 // G1 barrier needs uncompressed oop for region cross check. 185 Register new_val = val; 186 if (UseCompressedOops) { 187 new_val = rbx; 188 __ movptr(new_val, val); 189 } 190 __ store_heap_oop(Address(rdx, 0), val); 191 __ g1_write_barrier_post(rdx /* store_adr */, 192 new_val /* new_val */, 193 rthread /* thread */, 194 rtmp /* tmp */, 195 rbx /* tmp2 */); 196 } 197 NOT_LP64( __ restore_bcp()); 198 } 199 break; 200 #endif // INCLUDE_ALL_GCS 201 case BarrierSet::CardTableForRS: 202 case BarrierSet::CardTableExtension: 203 { 204 if (val == noreg) { 205 __ store_heap_oop_null(obj); 206 } else { 207 __ store_heap_oop(obj, val); 208 // flatten object address if needed 209 if (!precise || (obj.index() == noreg && obj.disp() == 0)) { 210 __ store_check(obj.base()); 211 } else { 212 __ lea(rdx, obj); 213 __ store_check(rdx); 214 } 215 } 216 } 217 break; 218 case BarrierSet::ModRef: 219 if (val == noreg) { 220 __ store_heap_oop_null(obj); 221 } else { 222 __ store_heap_oop(obj, val); 223 } 224 break; 225 default : 226 ShouldNotReachHere(); 227 228 } 229 } 230 231 Address TemplateTable::at_bcp(int offset) { 232 assert(_desc->uses_bcp(), "inconsistent uses_bcp information"); 233 return Address(rbcp, offset); 234 } 235 236 237 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg, 238 Register temp_reg, bool load_bc_into_bc_reg/*=true*/, 239 int byte_no) { 240 if (!RewriteBytecodes) return; 241 Label L_patch_done; 242 243 switch (bc) { 244 case Bytecodes::_fast_aputfield: 245 case Bytecodes::_fast_bputfield: 246 case Bytecodes::_fast_zputfield: 247 case Bytecodes::_fast_cputfield: 248 case Bytecodes::_fast_dputfield: 249 case Bytecodes::_fast_fputfield: 250 case Bytecodes::_fast_iputfield: 251 case Bytecodes::_fast_lputfield: 252 case Bytecodes::_fast_sputfield: 253 { 254 // We skip bytecode quickening for putfield instructions when 255 // the put_code written to the constant pool cache is zero. 256 // This is required so that every execution of this instruction 257 // calls out to InterpreterRuntime::resolve_get_put to do 258 // additional, required work. 259 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 260 assert(load_bc_into_bc_reg, "we use bc_reg as temp"); 261 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1); 262 __ movl(bc_reg, bc); 263 __ cmpl(temp_reg, (int) 0); 264 __ jcc(Assembler::zero, L_patch_done); // don't patch 265 } 266 break; 267 default: 268 assert(byte_no == -1, "sanity"); 269 // the pair bytecodes have already done the load. 270 if (load_bc_into_bc_reg) { 271 __ movl(bc_reg, bc); 272 } 273 } 274 275 if (JvmtiExport::can_post_breakpoint()) { 276 Label L_fast_patch; 277 // if a breakpoint is present we can't rewrite the stream directly 278 __ movzbl(temp_reg, at_bcp(0)); 279 __ cmpl(temp_reg, Bytecodes::_breakpoint); 280 __ jcc(Assembler::notEqual, L_fast_patch); 281 __ get_method(temp_reg); 282 // Let breakpoint table handling rewrite to quicker bytecode 283 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg); 284 #ifndef ASSERT 285 __ jmpb(L_patch_done); 286 #else 287 __ jmp(L_patch_done); 288 #endif 289 __ bind(L_fast_patch); 290 } 291 292 #ifdef ASSERT 293 Label L_okay; 294 __ load_unsigned_byte(temp_reg, at_bcp(0)); 295 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc)); 296 __ jcc(Assembler::equal, L_okay); 297 __ cmpl(temp_reg, bc_reg); 298 __ jcc(Assembler::equal, L_okay); 299 __ stop("patching the wrong bytecode"); 300 __ bind(L_okay); 301 #endif 302 303 // patch bytecode 304 __ movb(at_bcp(0), bc_reg); 305 __ bind(L_patch_done); 306 } 307 // Individual instructions 308 309 310 void TemplateTable::nop() { 311 transition(vtos, vtos); 312 // nothing to do 313 } 314 315 void TemplateTable::shouldnotreachhere() { 316 transition(vtos, vtos); 317 __ stop("shouldnotreachhere bytecode"); 318 } 319 320 void TemplateTable::aconst_null() { 321 transition(vtos, atos); 322 __ xorl(rax, rax); 323 } 324 325 void TemplateTable::iconst(int value) { 326 transition(vtos, itos); 327 if (value == 0) { 328 __ xorl(rax, rax); 329 } else { 330 __ movl(rax, value); 331 } 332 } 333 334 void TemplateTable::lconst(int value) { 335 transition(vtos, ltos); 336 if (value == 0) { 337 __ xorl(rax, rax); 338 } else { 339 __ movl(rax, value); 340 } 341 #ifndef _LP64 342 assert(value >= 0, "check this code"); 343 __ xorptr(rdx, rdx); 344 #endif 345 } 346 347 348 349 void TemplateTable::fconst(int value) { 350 transition(vtos, ftos); 351 if (UseSSE >= 1) { 352 static float one = 1.0f, two = 2.0f; 353 switch (value) { 354 case 0: 355 __ xorps(xmm0, xmm0); 356 break; 357 case 1: 358 __ movflt(xmm0, ExternalAddress((address) &one)); 359 break; 360 case 2: 361 __ movflt(xmm0, ExternalAddress((address) &two)); 362 break; 363 default: 364 ShouldNotReachHere(); 365 break; 366 } 367 } else { 368 #ifdef _LP64 369 ShouldNotReachHere(); 370 #else 371 if (value == 0) { __ fldz(); 372 } else if (value == 1) { __ fld1(); 373 } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here 374 } else { ShouldNotReachHere(); 375 } 376 #endif // _LP64 377 } 378 } 379 380 void TemplateTable::dconst(int value) { 381 transition(vtos, dtos); 382 if (UseSSE >= 2) { 383 static double one = 1.0; 384 switch (value) { 385 case 0: 386 __ xorpd(xmm0, xmm0); 387 break; 388 case 1: 389 __ movdbl(xmm0, ExternalAddress((address) &one)); 390 break; 391 default: 392 ShouldNotReachHere(); 393 break; 394 } 395 } else { 396 #ifdef _LP64 397 ShouldNotReachHere(); 398 #else 399 if (value == 0) { __ fldz(); 400 } else if (value == 1) { __ fld1(); 401 } else { ShouldNotReachHere(); 402 } 403 #endif 404 } 405 } 406 407 void TemplateTable::bipush() { 408 transition(vtos, itos); 409 __ load_signed_byte(rax, at_bcp(1)); 410 } 411 412 void TemplateTable::sipush() { 413 transition(vtos, itos); 414 __ load_unsigned_short(rax, at_bcp(1)); 415 __ bswapl(rax); 416 __ sarl(rax, 16); 417 } 418 419 void TemplateTable::ldc(bool wide) { 420 transition(vtos, vtos); 421 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1); 422 Label call_ldc, notFloat, notClass, Done; 423 424 if (wide) { 425 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); 426 } else { 427 __ load_unsigned_byte(rbx, at_bcp(1)); 428 } 429 430 __ get_cpool_and_tags(rcx, rax); 431 const int base_offset = ConstantPool::header_size() * wordSize; 432 const int tags_offset = Array<u1>::base_offset_in_bytes(); 433 434 // get type 435 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset)); 436 437 // unresolved class - get the resolved class 438 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass); 439 __ jccb(Assembler::equal, call_ldc); 440 441 // unresolved class in error state - call into runtime to throw the error 442 // from the first resolution attempt 443 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError); 444 __ jccb(Assembler::equal, call_ldc); 445 446 // resolved class - need to call vm to get java mirror of the class 447 __ cmpl(rdx, JVM_CONSTANT_Class); 448 __ jcc(Assembler::notEqual, notClass); 449 450 __ bind(call_ldc); 451 452 __ movl(rarg, wide); 453 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg); 454 455 __ push(atos); 456 __ jmp(Done); 457 458 __ bind(notClass); 459 __ cmpl(rdx, JVM_CONSTANT_Float); 460 __ jccb(Assembler::notEqual, notFloat); 461 462 // ftos 463 __ load_float(Address(rcx, rbx, Address::times_ptr, base_offset)); 464 __ push(ftos); 465 __ jmp(Done); 466 467 __ bind(notFloat); 468 #ifdef ASSERT 469 { 470 Label L; 471 __ cmpl(rdx, JVM_CONSTANT_Integer); 472 __ jcc(Assembler::equal, L); 473 // String and Object are rewritten to fast_aldc 474 __ stop("unexpected tag type in ldc"); 475 __ bind(L); 476 } 477 #endif 478 // itos JVM_CONSTANT_Integer only 479 __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset)); 480 __ push(itos); 481 __ bind(Done); 482 } 483 484 // Fast path for caching oop constants. 485 void TemplateTable::fast_aldc(bool wide) { 486 transition(vtos, atos); 487 488 Register result = rax; 489 Register tmp = rdx; 490 int index_size = wide ? sizeof(u2) : sizeof(u1); 491 492 Label resolved; 493 494 // We are resolved if the resolved reference cache entry contains a 495 // non-null object (String, MethodType, etc.) 496 assert_different_registers(result, tmp); 497 __ get_cache_index_at_bcp(tmp, 1, index_size); 498 __ load_resolved_reference_at_index(result, tmp); 499 __ testl(result, result); 500 __ jcc(Assembler::notZero, resolved); 501 502 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); 503 504 // first time invocation - must resolve first 505 __ movl(tmp, (int)bytecode()); 506 __ call_VM(result, entry, tmp); 507 508 __ bind(resolved); 509 510 if (VerifyOops) { 511 __ verify_oop(result); 512 } 513 } 514 515 void TemplateTable::ldc2_w() { 516 transition(vtos, vtos); 517 Label Long, Done; 518 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); 519 520 __ get_cpool_and_tags(rcx, rax); 521 const int base_offset = ConstantPool::header_size() * wordSize; 522 const int tags_offset = Array<u1>::base_offset_in_bytes(); 523 524 // get type 525 __ cmpb(Address(rax, rbx, Address::times_1, tags_offset), 526 JVM_CONSTANT_Double); 527 __ jccb(Assembler::notEqual, Long); 528 529 // dtos 530 __ load_double(Address(rcx, rbx, Address::times_ptr, base_offset)); 531 __ push(dtos); 532 533 __ jmpb(Done); 534 __ bind(Long); 535 536 // ltos 537 __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize)); 538 NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize))); 539 __ push(ltos); 540 541 __ bind(Done); 542 } 543 544 void TemplateTable::locals_index(Register reg, int offset) { 545 __ load_unsigned_byte(reg, at_bcp(offset)); 546 __ negptr(reg); 547 } 548 549 void TemplateTable::iload() { 550 iload_internal(); 551 } 552 553 void TemplateTable::nofast_iload() { 554 iload_internal(may_not_rewrite); 555 } 556 557 void TemplateTable::iload_internal(RewriteControl rc) { 558 transition(vtos, itos); 559 if (RewriteFrequentPairs && rc == may_rewrite) { 560 Label rewrite, done; 561 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 562 LP64_ONLY(assert(rbx != bc, "register damaged")); 563 564 // get next byte 565 __ load_unsigned_byte(rbx, 566 at_bcp(Bytecodes::length_for(Bytecodes::_iload))); 567 // if _iload, wait to rewrite to iload2. We only want to rewrite the 568 // last two iloads in a pair. Comparing against fast_iload means that 569 // the next bytecode is neither an iload or a caload, and therefore 570 // an iload pair. 571 __ cmpl(rbx, Bytecodes::_iload); 572 __ jcc(Assembler::equal, done); 573 574 __ cmpl(rbx, Bytecodes::_fast_iload); 575 __ movl(bc, Bytecodes::_fast_iload2); 576 577 __ jccb(Assembler::equal, rewrite); 578 579 // if _caload, rewrite to fast_icaload 580 __ cmpl(rbx, Bytecodes::_caload); 581 __ movl(bc, Bytecodes::_fast_icaload); 582 __ jccb(Assembler::equal, rewrite); 583 584 // rewrite so iload doesn't check again. 585 __ movl(bc, Bytecodes::_fast_iload); 586 587 // rewrite 588 // bc: fast bytecode 589 __ bind(rewrite); 590 patch_bytecode(Bytecodes::_iload, bc, rbx, false); 591 __ bind(done); 592 } 593 594 // Get the local value into tos 595 locals_index(rbx); 596 __ movl(rax, iaddress(rbx)); 597 } 598 599 void TemplateTable::fast_iload2() { 600 transition(vtos, itos); 601 locals_index(rbx); 602 __ movl(rax, iaddress(rbx)); 603 __ push(itos); 604 locals_index(rbx, 3); 605 __ movl(rax, iaddress(rbx)); 606 } 607 608 void TemplateTable::fast_iload() { 609 transition(vtos, itos); 610 locals_index(rbx); 611 __ movl(rax, iaddress(rbx)); 612 } 613 614 void TemplateTable::lload() { 615 transition(vtos, ltos); 616 locals_index(rbx); 617 __ movptr(rax, laddress(rbx)); 618 NOT_LP64(__ movl(rdx, haddress(rbx))); 619 } 620 621 void TemplateTable::fload() { 622 transition(vtos, ftos); 623 locals_index(rbx); 624 __ load_float(faddress(rbx)); 625 } 626 627 void TemplateTable::dload() { 628 transition(vtos, dtos); 629 locals_index(rbx); 630 __ load_double(daddress(rbx)); 631 } 632 633 void TemplateTable::aload() { 634 transition(vtos, atos); 635 locals_index(rbx); 636 __ movptr(rax, aaddress(rbx)); 637 } 638 639 void TemplateTable::locals_index_wide(Register reg) { 640 __ load_unsigned_short(reg, at_bcp(2)); 641 __ bswapl(reg); 642 __ shrl(reg, 16); 643 __ negptr(reg); 644 } 645 646 void TemplateTable::wide_iload() { 647 transition(vtos, itos); 648 locals_index_wide(rbx); 649 __ movl(rax, iaddress(rbx)); 650 } 651 652 void TemplateTable::wide_lload() { 653 transition(vtos, ltos); 654 locals_index_wide(rbx); 655 __ movptr(rax, laddress(rbx)); 656 NOT_LP64(__ movl(rdx, haddress(rbx))); 657 } 658 659 void TemplateTable::wide_fload() { 660 transition(vtos, ftos); 661 locals_index_wide(rbx); 662 __ load_float(faddress(rbx)); 663 } 664 665 void TemplateTable::wide_dload() { 666 transition(vtos, dtos); 667 locals_index_wide(rbx); 668 __ load_double(daddress(rbx)); 669 } 670 671 void TemplateTable::wide_aload() { 672 transition(vtos, atos); 673 locals_index_wide(rbx); 674 __ movptr(rax, aaddress(rbx)); 675 } 676 677 void TemplateTable::index_check(Register array, Register index) { 678 // Pop ptr into array 679 __ pop_ptr(array); 680 index_check_without_pop(array, index); 681 } 682 683 void TemplateTable::index_check_without_pop(Register array, Register index) { 684 // destroys rbx 685 // check array 686 __ null_check(array, arrayOopDesc::length_offset_in_bytes()); 687 // sign extend index for use by indexed load 688 __ movl2ptr(index, index); 689 // check index 690 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes())); 691 if (index != rbx) { 692 // ??? convention: move aberrant index into rbx for exception message 693 assert(rbx != array, "different registers"); 694 __ movl(rbx, index); 695 } 696 __ jump_cc(Assembler::aboveEqual, 697 ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry)); 698 } 699 700 701 void TemplateTable::iaload() { 702 transition(itos, itos); 703 // rax: index 704 // rdx: array 705 index_check(rdx, rax); // kills rbx 706 __ movl(rax, Address(rdx, rax, 707 Address::times_4, 708 arrayOopDesc::base_offset_in_bytes(T_INT))); 709 } 710 711 void TemplateTable::laload() { 712 transition(itos, ltos); 713 // rax: index 714 // rdx: array 715 index_check(rdx, rax); // kills rbx 716 NOT_LP64(__ mov(rbx, rax)); 717 // rbx,: index 718 __ movptr(rax, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize)); 719 NOT_LP64(__ movl(rdx, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize))); 720 } 721 722 723 724 void TemplateTable::faload() { 725 transition(itos, ftos); 726 // rax: index 727 // rdx: array 728 index_check(rdx, rax); // kills rbx 729 __ load_float(Address(rdx, rax, 730 Address::times_4, 731 arrayOopDesc::base_offset_in_bytes(T_FLOAT))); 732 } 733 734 void TemplateTable::daload() { 735 transition(itos, dtos); 736 // rax: index 737 // rdx: array 738 index_check(rdx, rax); // kills rbx 739 __ load_double(Address(rdx, rax, 740 Address::times_8, 741 arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); 742 } 743 744 void TemplateTable::aaload() { 745 transition(itos, atos); 746 // rax: index 747 // rdx: array 748 index_check(rdx, rax); // kills rbx 749 __ load_heap_oop(rax, Address(rdx, rax, 750 UseCompressedOops ? Address::times_4 : Address::times_ptr, 751 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 752 } 753 754 void TemplateTable::baload() { 755 transition(itos, itos); 756 // rax: index 757 // rdx: array 758 index_check(rdx, rax); // kills rbx 759 __ load_signed_byte(rax, Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE))); 760 } 761 762 void TemplateTable::caload() { 763 transition(itos, itos); 764 // rax: index 765 // rdx: array 766 index_check(rdx, rax); // kills rbx 767 __ load_unsigned_short(rax, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 768 } 769 770 // iload followed by caload frequent pair 771 void TemplateTable::fast_icaload() { 772 transition(vtos, itos); 773 // load index out of locals 774 locals_index(rbx); 775 __ movl(rax, iaddress(rbx)); 776 777 // rax: index 778 // rdx: array 779 index_check(rdx, rax); // kills rbx 780 __ load_unsigned_short(rax, 781 Address(rdx, rax, 782 Address::times_2, 783 arrayOopDesc::base_offset_in_bytes(T_CHAR))); 784 } 785 786 787 void TemplateTable::saload() { 788 transition(itos, itos); 789 // rax: index 790 // rdx: array 791 index_check(rdx, rax); // kills rbx 792 __ load_signed_short(rax, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT))); 793 } 794 795 void TemplateTable::iload(int n) { 796 transition(vtos, itos); 797 __ movl(rax, iaddress(n)); 798 } 799 800 void TemplateTable::lload(int n) { 801 transition(vtos, ltos); 802 __ movptr(rax, laddress(n)); 803 NOT_LP64(__ movptr(rdx, haddress(n))); 804 } 805 806 void TemplateTable::fload(int n) { 807 transition(vtos, ftos); 808 __ load_float(faddress(n)); 809 } 810 811 void TemplateTable::dload(int n) { 812 transition(vtos, dtos); 813 __ load_double(daddress(n)); 814 } 815 816 void TemplateTable::aload(int n) { 817 transition(vtos, atos); 818 __ movptr(rax, aaddress(n)); 819 } 820 821 void TemplateTable::aload_0() { 822 aload_0_internal(); 823 } 824 825 void TemplateTable::nofast_aload_0() { 826 aload_0_internal(may_not_rewrite); 827 } 828 829 void TemplateTable::aload_0_internal(RewriteControl rc) { 830 transition(vtos, atos); 831 // According to bytecode histograms, the pairs: 832 // 833 // _aload_0, _fast_igetfield 834 // _aload_0, _fast_agetfield 835 // _aload_0, _fast_fgetfield 836 // 837 // occur frequently. If RewriteFrequentPairs is set, the (slow) 838 // _aload_0 bytecode checks if the next bytecode is either 839 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then 840 // rewrites the current bytecode into a pair bytecode; otherwise it 841 // rewrites the current bytecode into _fast_aload_0 that doesn't do 842 // the pair check anymore. 843 // 844 // Note: If the next bytecode is _getfield, the rewrite must be 845 // delayed, otherwise we may miss an opportunity for a pair. 846 // 847 // Also rewrite frequent pairs 848 // aload_0, aload_1 849 // aload_0, iload_1 850 // These bytecodes with a small amount of code are most profitable 851 // to rewrite 852 if (RewriteFrequentPairs && rc == may_rewrite) { 853 Label rewrite, done; 854 855 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 856 LP64_ONLY(assert(rbx != bc, "register damaged")); 857 858 // get next byte 859 __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0))); 860 861 // if _getfield then wait with rewrite 862 __ cmpl(rbx, Bytecodes::_getfield); 863 __ jcc(Assembler::equal, done); 864 865 // if _igetfield then rewrite to _fast_iaccess_0 866 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 867 __ cmpl(rbx, Bytecodes::_fast_igetfield); 868 __ movl(bc, Bytecodes::_fast_iaccess_0); 869 __ jccb(Assembler::equal, rewrite); 870 871 // if _agetfield then rewrite to _fast_aaccess_0 872 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 873 __ cmpl(rbx, Bytecodes::_fast_agetfield); 874 __ movl(bc, Bytecodes::_fast_aaccess_0); 875 __ jccb(Assembler::equal, rewrite); 876 877 // if _fgetfield then rewrite to _fast_faccess_0 878 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 879 __ cmpl(rbx, Bytecodes::_fast_fgetfield); 880 __ movl(bc, Bytecodes::_fast_faccess_0); 881 __ jccb(Assembler::equal, rewrite); 882 883 // else rewrite to _fast_aload0 884 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition"); 885 __ movl(bc, Bytecodes::_fast_aload_0); 886 887 // rewrite 888 // bc: fast bytecode 889 __ bind(rewrite); 890 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false); 891 892 __ bind(done); 893 } 894 895 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop). 896 aload(0); 897 } 898 899 void TemplateTable::istore() { 900 transition(itos, vtos); 901 locals_index(rbx); 902 __ movl(iaddress(rbx), rax); 903 } 904 905 906 void TemplateTable::lstore() { 907 transition(ltos, vtos); 908 locals_index(rbx); 909 __ movptr(laddress(rbx), rax); 910 NOT_LP64(__ movptr(haddress(rbx), rdx)); 911 } 912 913 void TemplateTable::fstore() { 914 transition(ftos, vtos); 915 locals_index(rbx); 916 __ store_float(faddress(rbx)); 917 } 918 919 void TemplateTable::dstore() { 920 transition(dtos, vtos); 921 locals_index(rbx); 922 __ store_double(daddress(rbx)); 923 } 924 925 void TemplateTable::astore() { 926 transition(vtos, vtos); 927 __ pop_ptr(rax); 928 locals_index(rbx); 929 __ movptr(aaddress(rbx), rax); 930 } 931 932 void TemplateTable::wide_istore() { 933 transition(vtos, vtos); 934 __ pop_i(); 935 locals_index_wide(rbx); 936 __ movl(iaddress(rbx), rax); 937 } 938 939 void TemplateTable::wide_lstore() { 940 transition(vtos, vtos); 941 NOT_LP64(__ pop_l(rax, rdx)); 942 LP64_ONLY(__ pop_l()); 943 locals_index_wide(rbx); 944 __ movptr(laddress(rbx), rax); 945 NOT_LP64(__ movl(haddress(rbx), rdx)); 946 } 947 948 void TemplateTable::wide_fstore() { 949 #ifdef _LP64 950 transition(vtos, vtos); 951 __ pop_f(xmm0); 952 locals_index_wide(rbx); 953 __ movflt(faddress(rbx), xmm0); 954 #else 955 wide_istore(); 956 #endif 957 } 958 959 void TemplateTable::wide_dstore() { 960 #ifdef _LP64 961 transition(vtos, vtos); 962 __ pop_d(xmm0); 963 locals_index_wide(rbx); 964 __ movdbl(daddress(rbx), xmm0); 965 #else 966 wide_lstore(); 967 #endif 968 } 969 970 void TemplateTable::wide_astore() { 971 transition(vtos, vtos); 972 __ pop_ptr(rax); 973 locals_index_wide(rbx); 974 __ movptr(aaddress(rbx), rax); 975 } 976 977 void TemplateTable::iastore() { 978 transition(itos, vtos); 979 __ pop_i(rbx); 980 // rax: value 981 // rbx: index 982 // rdx: array 983 index_check(rdx, rbx); // prefer index in rbx 984 __ movl(Address(rdx, rbx, 985 Address::times_4, 986 arrayOopDesc::base_offset_in_bytes(T_INT)), 987 rax); 988 } 989 990 void TemplateTable::lastore() { 991 transition(ltos, vtos); 992 __ pop_i(rbx); 993 // rax,: low(value) 994 // rcx: array 995 // rdx: high(value) 996 index_check(rcx, rbx); // prefer index in rbx, 997 // rbx,: index 998 __ movptr(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize), rax); 999 NOT_LP64(__ movl(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize), rdx)); 1000 } 1001 1002 1003 void TemplateTable::fastore() { 1004 transition(ftos, vtos); 1005 __ pop_i(rbx); 1006 // value is in UseSSE >= 1 ? xmm0 : ST(0) 1007 // rbx: index 1008 // rdx: array 1009 index_check(rdx, rbx); // prefer index in rbx 1010 __ store_float(Address(rdx, rbx, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_FLOAT))); 1011 } 1012 1013 void TemplateTable::dastore() { 1014 transition(dtos, vtos); 1015 __ pop_i(rbx); 1016 // value is in UseSSE >= 2 ? xmm0 : ST(0) 1017 // rbx: index 1018 // rdx: array 1019 index_check(rdx, rbx); // prefer index in rbx 1020 __ store_double(Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); 1021 } 1022 1023 void TemplateTable::aastore() { 1024 Label is_null, ok_is_subtype, done; 1025 transition(vtos, vtos); 1026 // stack: ..., array, index, value 1027 __ movptr(rax, at_tos()); // value 1028 __ movl(rcx, at_tos_p1()); // index 1029 __ movptr(rdx, at_tos_p2()); // array 1030 1031 Address element_address(rdx, rcx, 1032 UseCompressedOops? Address::times_4 : Address::times_ptr, 1033 arrayOopDesc::base_offset_in_bytes(T_OBJECT)); 1034 1035 index_check_without_pop(rdx, rcx); // kills rbx 1036 __ testptr(rax, rax); 1037 __ jcc(Assembler::zero, is_null); 1038 1039 // Move subklass into rbx 1040 __ load_klass(rbx, rax); 1041 // Move superklass into rax 1042 __ load_klass(rax, rdx); 1043 __ movptr(rax, Address(rax, 1044 ObjArrayKlass::element_klass_offset())); 1045 // Compress array + index*oopSize + 12 into a single register. Frees rcx. 1046 __ lea(rdx, element_address); 1047 1048 // Generate subtype check. Blows rcx, rdi 1049 // Superklass in rax. Subklass in rbx. 1050 __ gen_subtype_check(rbx, ok_is_subtype); 1051 1052 // Come here on failure 1053 // object is at TOS 1054 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry)); 1055 1056 // Come here on success 1057 __ bind(ok_is_subtype); 1058 1059 // Get the value we will store 1060 __ movptr(rax, at_tos()); 1061 // Now store using the appropriate barrier 1062 do_oop_store(_masm, Address(rdx, 0), rax, _bs->kind(), true); 1063 __ jmp(done); 1064 1065 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx] 1066 __ bind(is_null); 1067 __ profile_null_seen(rbx); 1068 1069 // Store a NULL 1070 do_oop_store(_masm, element_address, noreg, _bs->kind(), true); 1071 1072 // Pop stack arguments 1073 __ bind(done); 1074 __ addptr(rsp, 3 * Interpreter::stackElementSize); 1075 } 1076 1077 void TemplateTable::bastore() { 1078 transition(itos, vtos); 1079 __ pop_i(rbx); 1080 // rax: value 1081 // rbx: index 1082 // rdx: array 1083 index_check(rdx, rbx); // prefer index in rbx 1084 // Need to check whether array is boolean or byte 1085 // since both types share the bastore bytecode. 1086 __ load_klass(rcx, rdx); 1087 __ movl(rcx, Address(rcx, Klass::layout_helper_offset())); 1088 int diffbit = Klass::layout_helper_boolean_diffbit(); 1089 __ testl(rcx, diffbit); 1090 Label L_skip; 1091 __ jccb(Assembler::zero, L_skip); 1092 __ andl(rax, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1 1093 __ bind(L_skip); 1094 __ movb(Address(rdx, rbx, 1095 Address::times_1, 1096 arrayOopDesc::base_offset_in_bytes(T_BYTE)), 1097 rax); 1098 } 1099 1100 void TemplateTable::castore() { 1101 transition(itos, vtos); 1102 __ pop_i(rbx); 1103 // rax: value 1104 // rbx: index 1105 // rdx: array 1106 index_check(rdx, rbx); // prefer index in rbx 1107 __ movw(Address(rdx, rbx, 1108 Address::times_2, 1109 arrayOopDesc::base_offset_in_bytes(T_CHAR)), 1110 rax); 1111 } 1112 1113 1114 void TemplateTable::sastore() { 1115 castore(); 1116 } 1117 1118 void TemplateTable::istore(int n) { 1119 transition(itos, vtos); 1120 __ movl(iaddress(n), rax); 1121 } 1122 1123 void TemplateTable::lstore(int n) { 1124 transition(ltos, vtos); 1125 __ movptr(laddress(n), rax); 1126 NOT_LP64(__ movptr(haddress(n), rdx)); 1127 } 1128 1129 void TemplateTable::fstore(int n) { 1130 transition(ftos, vtos); 1131 __ store_float(faddress(n)); 1132 } 1133 1134 void TemplateTable::dstore(int n) { 1135 transition(dtos, vtos); 1136 __ store_double(daddress(n)); 1137 } 1138 1139 1140 void TemplateTable::astore(int n) { 1141 transition(vtos, vtos); 1142 __ pop_ptr(rax); 1143 __ movptr(aaddress(n), rax); 1144 } 1145 1146 void TemplateTable::pop() { 1147 transition(vtos, vtos); 1148 __ addptr(rsp, Interpreter::stackElementSize); 1149 } 1150 1151 void TemplateTable::pop2() { 1152 transition(vtos, vtos); 1153 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1154 } 1155 1156 1157 void TemplateTable::dup() { 1158 transition(vtos, vtos); 1159 __ load_ptr(0, rax); 1160 __ push_ptr(rax); 1161 // stack: ..., a, a 1162 } 1163 1164 void TemplateTable::dup_x1() { 1165 transition(vtos, vtos); 1166 // stack: ..., a, b 1167 __ load_ptr( 0, rax); // load b 1168 __ load_ptr( 1, rcx); // load a 1169 __ store_ptr(1, rax); // store b 1170 __ store_ptr(0, rcx); // store a 1171 __ push_ptr(rax); // push b 1172 // stack: ..., b, a, b 1173 } 1174 1175 void TemplateTable::dup_x2() { 1176 transition(vtos, vtos); 1177 // stack: ..., a, b, c 1178 __ load_ptr( 0, rax); // load c 1179 __ load_ptr( 2, rcx); // load a 1180 __ store_ptr(2, rax); // store c in a 1181 __ push_ptr(rax); // push c 1182 // stack: ..., c, b, c, c 1183 __ load_ptr( 2, rax); // load b 1184 __ store_ptr(2, rcx); // store a in b 1185 // stack: ..., c, a, c, c 1186 __ store_ptr(1, rax); // store b in c 1187 // stack: ..., c, a, b, c 1188 } 1189 1190 void TemplateTable::dup2() { 1191 transition(vtos, vtos); 1192 // stack: ..., a, b 1193 __ load_ptr(1, rax); // load a 1194 __ push_ptr(rax); // push a 1195 __ load_ptr(1, rax); // load b 1196 __ push_ptr(rax); // push b 1197 // stack: ..., a, b, a, b 1198 } 1199 1200 1201 void TemplateTable::dup2_x1() { 1202 transition(vtos, vtos); 1203 // stack: ..., a, b, c 1204 __ load_ptr( 0, rcx); // load c 1205 __ load_ptr( 1, rax); // load b 1206 __ push_ptr(rax); // push b 1207 __ push_ptr(rcx); // push c 1208 // stack: ..., a, b, c, b, c 1209 __ store_ptr(3, rcx); // store c in b 1210 // stack: ..., a, c, c, b, c 1211 __ load_ptr( 4, rcx); // load a 1212 __ store_ptr(2, rcx); // store a in 2nd c 1213 // stack: ..., a, c, a, b, c 1214 __ store_ptr(4, rax); // store b in a 1215 // stack: ..., b, c, a, b, c 1216 } 1217 1218 void TemplateTable::dup2_x2() { 1219 transition(vtos, vtos); 1220 // stack: ..., a, b, c, d 1221 __ load_ptr( 0, rcx); // load d 1222 __ load_ptr( 1, rax); // load c 1223 __ push_ptr(rax); // push c 1224 __ push_ptr(rcx); // push d 1225 // stack: ..., a, b, c, d, c, d 1226 __ load_ptr( 4, rax); // load b 1227 __ store_ptr(2, rax); // store b in d 1228 __ store_ptr(4, rcx); // store d in b 1229 // stack: ..., a, d, c, b, c, d 1230 __ load_ptr( 5, rcx); // load a 1231 __ load_ptr( 3, rax); // load c 1232 __ store_ptr(3, rcx); // store a in c 1233 __ store_ptr(5, rax); // store c in a 1234 // stack: ..., c, d, a, b, c, d 1235 } 1236 1237 void TemplateTable::swap() { 1238 transition(vtos, vtos); 1239 // stack: ..., a, b 1240 __ load_ptr( 1, rcx); // load a 1241 __ load_ptr( 0, rax); // load b 1242 __ store_ptr(0, rcx); // store a in b 1243 __ store_ptr(1, rax); // store b in a 1244 // stack: ..., b, a 1245 } 1246 1247 void TemplateTable::iop2(Operation op) { 1248 transition(itos, itos); 1249 switch (op) { 1250 case add : __ pop_i(rdx); __ addl (rax, rdx); break; 1251 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break; 1252 case mul : __ pop_i(rdx); __ imull(rax, rdx); break; 1253 case _and : __ pop_i(rdx); __ andl (rax, rdx); break; 1254 case _or : __ pop_i(rdx); __ orl (rax, rdx); break; 1255 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break; 1256 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break; 1257 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break; 1258 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break; 1259 default : ShouldNotReachHere(); 1260 } 1261 } 1262 1263 void TemplateTable::lop2(Operation op) { 1264 transition(ltos, ltos); 1265 #ifdef _LP64 1266 switch (op) { 1267 case add : __ pop_l(rdx); __ addptr(rax, rdx); break; 1268 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break; 1269 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break; 1270 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break; 1271 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break; 1272 default : ShouldNotReachHere(); 1273 } 1274 #else 1275 __ pop_l(rbx, rcx); 1276 switch (op) { 1277 case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break; 1278 case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx); 1279 __ mov (rax, rbx); __ mov (rdx, rcx); break; 1280 case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break; 1281 case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break; 1282 case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break; 1283 default : ShouldNotReachHere(); 1284 } 1285 #endif 1286 } 1287 1288 void TemplateTable::idiv() { 1289 transition(itos, itos); 1290 __ movl(rcx, rax); 1291 __ pop_i(rax); 1292 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If 1293 // they are not equal, one could do a normal division (no correction 1294 // needed), which may speed up this implementation for the common case. 1295 // (see also JVM spec., p.243 & p.271) 1296 __ corrected_idivl(rcx); 1297 } 1298 1299 void TemplateTable::irem() { 1300 transition(itos, itos); 1301 __ movl(rcx, rax); 1302 __ pop_i(rax); 1303 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If 1304 // they are not equal, one could do a normal division (no correction 1305 // needed), which may speed up this implementation for the common case. 1306 // (see also JVM spec., p.243 & p.271) 1307 __ corrected_idivl(rcx); 1308 __ movl(rax, rdx); 1309 } 1310 1311 void TemplateTable::lmul() { 1312 transition(ltos, ltos); 1313 #ifdef _LP64 1314 __ pop_l(rdx); 1315 __ imulq(rax, rdx); 1316 #else 1317 __ pop_l(rbx, rcx); 1318 __ push(rcx); __ push(rbx); 1319 __ push(rdx); __ push(rax); 1320 __ lmul(2 * wordSize, 0); 1321 __ addptr(rsp, 4 * wordSize); // take off temporaries 1322 #endif 1323 } 1324 1325 void TemplateTable::ldiv() { 1326 transition(ltos, ltos); 1327 #ifdef _LP64 1328 __ mov(rcx, rax); 1329 __ pop_l(rax); 1330 // generate explicit div0 check 1331 __ testq(rcx, rcx); 1332 __ jump_cc(Assembler::zero, 1333 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1334 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If 1335 // they are not equal, one could do a normal division (no correction 1336 // needed), which may speed up this implementation for the common case. 1337 // (see also JVM spec., p.243 & p.271) 1338 __ corrected_idivq(rcx); // kills rbx 1339 #else 1340 __ pop_l(rbx, rcx); 1341 __ push(rcx); __ push(rbx); 1342 __ push(rdx); __ push(rax); 1343 // check if y = 0 1344 __ orl(rax, rdx); 1345 __ jump_cc(Assembler::zero, 1346 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1347 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv)); 1348 __ addptr(rsp, 4 * wordSize); // take off temporaries 1349 #endif 1350 } 1351 1352 void TemplateTable::lrem() { 1353 transition(ltos, ltos); 1354 #ifdef _LP64 1355 __ mov(rcx, rax); 1356 __ pop_l(rax); 1357 __ testq(rcx, rcx); 1358 __ jump_cc(Assembler::zero, 1359 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1360 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If 1361 // they are not equal, one could do a normal division (no correction 1362 // needed), which may speed up this implementation for the common case. 1363 // (see also JVM spec., p.243 & p.271) 1364 __ corrected_idivq(rcx); // kills rbx 1365 __ mov(rax, rdx); 1366 #else 1367 __ pop_l(rbx, rcx); 1368 __ push(rcx); __ push(rbx); 1369 __ push(rdx); __ push(rax); 1370 // check if y = 0 1371 __ orl(rax, rdx); 1372 __ jump_cc(Assembler::zero, 1373 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1374 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem)); 1375 __ addptr(rsp, 4 * wordSize); 1376 #endif 1377 } 1378 1379 void TemplateTable::lshl() { 1380 transition(itos, ltos); 1381 __ movl(rcx, rax); // get shift count 1382 #ifdef _LP64 1383 __ pop_l(rax); // get shift value 1384 __ shlq(rax); 1385 #else 1386 __ pop_l(rax, rdx); // get shift value 1387 __ lshl(rdx, rax); 1388 #endif 1389 } 1390 1391 void TemplateTable::lshr() { 1392 #ifdef _LP64 1393 transition(itos, ltos); 1394 __ movl(rcx, rax); // get shift count 1395 __ pop_l(rax); // get shift value 1396 __ sarq(rax); 1397 #else 1398 transition(itos, ltos); 1399 __ mov(rcx, rax); // get shift count 1400 __ pop_l(rax, rdx); // get shift value 1401 __ lshr(rdx, rax, true); 1402 #endif 1403 } 1404 1405 void TemplateTable::lushr() { 1406 transition(itos, ltos); 1407 #ifdef _LP64 1408 __ movl(rcx, rax); // get shift count 1409 __ pop_l(rax); // get shift value 1410 __ shrq(rax); 1411 #else 1412 __ mov(rcx, rax); // get shift count 1413 __ pop_l(rax, rdx); // get shift value 1414 __ lshr(rdx, rax); 1415 #endif 1416 } 1417 1418 void TemplateTable::fop2(Operation op) { 1419 transition(ftos, ftos); 1420 1421 if (UseSSE >= 1) { 1422 switch (op) { 1423 case add: 1424 __ addss(xmm0, at_rsp()); 1425 __ addptr(rsp, Interpreter::stackElementSize); 1426 break; 1427 case sub: 1428 __ movflt(xmm1, xmm0); 1429 __ pop_f(xmm0); 1430 __ subss(xmm0, xmm1); 1431 break; 1432 case mul: 1433 __ mulss(xmm0, at_rsp()); 1434 __ addptr(rsp, Interpreter::stackElementSize); 1435 break; 1436 case div: 1437 __ movflt(xmm1, xmm0); 1438 __ pop_f(xmm0); 1439 __ divss(xmm0, xmm1); 1440 break; 1441 case rem: 1442 // On x86_64 platforms the SharedRuntime::frem method is called to perform the 1443 // modulo operation. The frem method calls the function 1444 // double fmod(double x, double y) in math.h. The documentation of fmod states: 1445 // "If x or y is a NaN, a NaN is returned." without specifying what type of NaN 1446 // (signalling or quiet) is returned. 1447 // 1448 // On x86_32 platforms the FPU is used to perform the modulo operation. The 1449 // reason is that on 32-bit Windows the sign of modulo operations diverges from 1450 // what is considered the standard (e.g., -0.0f % -3.14f is 0.0f (and not -0.0f). 1451 // The fprem instruction used on x86_32 is functionally equivalent to 1452 // SharedRuntime::frem in that it returns a NaN. 1453 #ifdef _LP64 1454 __ movflt(xmm1, xmm0); 1455 __ pop_f(xmm0); 1456 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2); 1457 #else 1458 __ push_f(xmm0); 1459 __ pop_f(); 1460 __ fld_s(at_rsp()); 1461 __ fremr(rax); 1462 __ f2ieee(); 1463 __ pop(rax); // pop second operand off the stack 1464 __ push_f(); 1465 __ pop_f(xmm0); 1466 #endif 1467 break; 1468 default: 1469 ShouldNotReachHere(); 1470 break; 1471 } 1472 } else { 1473 #ifdef _LP64 1474 ShouldNotReachHere(); 1475 #else 1476 switch (op) { 1477 case add: __ fadd_s (at_rsp()); break; 1478 case sub: __ fsubr_s(at_rsp()); break; 1479 case mul: __ fmul_s (at_rsp()); break; 1480 case div: __ fdivr_s(at_rsp()); break; 1481 case rem: __ fld_s (at_rsp()); __ fremr(rax); break; 1482 default : ShouldNotReachHere(); 1483 } 1484 __ f2ieee(); 1485 __ pop(rax); // pop second operand off the stack 1486 #endif // _LP64 1487 } 1488 } 1489 1490 void TemplateTable::dop2(Operation op) { 1491 transition(dtos, dtos); 1492 if (UseSSE >= 2) { 1493 switch (op) { 1494 case add: 1495 __ addsd(xmm0, at_rsp()); 1496 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1497 break; 1498 case sub: 1499 __ movdbl(xmm1, xmm0); 1500 __ pop_d(xmm0); 1501 __ subsd(xmm0, xmm1); 1502 break; 1503 case mul: 1504 __ mulsd(xmm0, at_rsp()); 1505 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1506 break; 1507 case div: 1508 __ movdbl(xmm1, xmm0); 1509 __ pop_d(xmm0); 1510 __ divsd(xmm0, xmm1); 1511 break; 1512 case rem: 1513 // Similar to fop2(), the modulo operation is performed using the 1514 // SharedRuntime::drem method (on x86_64 platforms) or using the 1515 // FPU (on x86_32 platforms) for the same reasons as mentioned in fop2(). 1516 #ifdef _LP64 1517 __ movdbl(xmm1, xmm0); 1518 __ pop_d(xmm0); 1519 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2); 1520 #else 1521 __ push_d(xmm0); 1522 __ pop_d(); 1523 __ fld_d(at_rsp()); 1524 __ fremr(rax); 1525 __ d2ieee(); 1526 __ pop(rax); 1527 __ pop(rdx); 1528 __ push_d(); 1529 __ pop_d(xmm0); 1530 #endif 1531 break; 1532 default: 1533 ShouldNotReachHere(); 1534 break; 1535 } 1536 } else { 1537 #ifdef _LP64 1538 ShouldNotReachHere(); 1539 #else 1540 switch (op) { 1541 case add: __ fadd_d (at_rsp()); break; 1542 case sub: __ fsubr_d(at_rsp()); break; 1543 case mul: { 1544 Label L_strict; 1545 Label L_join; 1546 const Address access_flags (rcx, Method::access_flags_offset()); 1547 __ get_method(rcx); 1548 __ movl(rcx, access_flags); 1549 __ testl(rcx, JVM_ACC_STRICT); 1550 __ jccb(Assembler::notZero, L_strict); 1551 __ fmul_d (at_rsp()); 1552 __ jmpb(L_join); 1553 __ bind(L_strict); 1554 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 1555 __ fmulp(); 1556 __ fmul_d (at_rsp()); 1557 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 1558 __ fmulp(); 1559 __ bind(L_join); 1560 break; 1561 } 1562 case div: { 1563 Label L_strict; 1564 Label L_join; 1565 const Address access_flags (rcx, Method::access_flags_offset()); 1566 __ get_method(rcx); 1567 __ movl(rcx, access_flags); 1568 __ testl(rcx, JVM_ACC_STRICT); 1569 __ jccb(Assembler::notZero, L_strict); 1570 __ fdivr_d(at_rsp()); 1571 __ jmp(L_join); 1572 __ bind(L_strict); 1573 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 1574 __ fmul_d (at_rsp()); 1575 __ fdivrp(); 1576 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 1577 __ fmulp(); 1578 __ bind(L_join); 1579 break; 1580 } 1581 case rem: __ fld_d (at_rsp()); __ fremr(rax); break; 1582 default : ShouldNotReachHere(); 1583 } 1584 __ d2ieee(); 1585 // Pop double precision number from rsp. 1586 __ pop(rax); 1587 __ pop(rdx); 1588 #endif 1589 } 1590 } 1591 1592 void TemplateTable::ineg() { 1593 transition(itos, itos); 1594 __ negl(rax); 1595 } 1596 1597 void TemplateTable::lneg() { 1598 transition(ltos, ltos); 1599 LP64_ONLY(__ negq(rax)); 1600 NOT_LP64(__ lneg(rdx, rax)); 1601 } 1602 1603 // Note: 'double' and 'long long' have 32-bits alignment on x86. 1604 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 1605 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 1606 // of 128-bits operands for SSE instructions. 1607 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF))); 1608 // Store the value to a 128-bits operand. 1609 operand[0] = lo; 1610 operand[1] = hi; 1611 return operand; 1612 } 1613 1614 // Buffer for 128-bits masks used by SSE instructions. 1615 static jlong float_signflip_pool[2*2]; 1616 static jlong double_signflip_pool[2*2]; 1617 1618 void TemplateTable::fneg() { 1619 transition(ftos, ftos); 1620 if (UseSSE >= 1) { 1621 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], CONST64(0x8000000080000000), CONST64(0x8000000080000000)); 1622 __ xorps(xmm0, ExternalAddress((address) float_signflip)); 1623 } else { 1624 LP64_ONLY(ShouldNotReachHere()); 1625 NOT_LP64(__ fchs()); 1626 } 1627 } 1628 1629 void TemplateTable::dneg() { 1630 transition(dtos, dtos); 1631 if (UseSSE >= 2) { 1632 static jlong *double_signflip = 1633 double_quadword(&double_signflip_pool[1], CONST64(0x8000000000000000), CONST64(0x8000000000000000)); 1634 __ xorpd(xmm0, ExternalAddress((address) double_signflip)); 1635 } else { 1636 #ifdef _LP64 1637 ShouldNotReachHere(); 1638 #else 1639 __ fchs(); 1640 #endif 1641 } 1642 } 1643 1644 void TemplateTable::iinc() { 1645 transition(vtos, vtos); 1646 __ load_signed_byte(rdx, at_bcp(2)); // get constant 1647 locals_index(rbx); 1648 __ addl(iaddress(rbx), rdx); 1649 } 1650 1651 void TemplateTable::wide_iinc() { 1652 transition(vtos, vtos); 1653 __ movl(rdx, at_bcp(4)); // get constant 1654 locals_index_wide(rbx); 1655 __ bswapl(rdx); // swap bytes & sign-extend constant 1656 __ sarl(rdx, 16); 1657 __ addl(iaddress(rbx), rdx); 1658 // Note: should probably use only one movl to get both 1659 // the index and the constant -> fix this 1660 } 1661 1662 void TemplateTable::convert() { 1663 #ifdef _LP64 1664 // Checking 1665 #ifdef ASSERT 1666 { 1667 TosState tos_in = ilgl; 1668 TosState tos_out = ilgl; 1669 switch (bytecode()) { 1670 case Bytecodes::_i2l: // fall through 1671 case Bytecodes::_i2f: // fall through 1672 case Bytecodes::_i2d: // fall through 1673 case Bytecodes::_i2b: // fall through 1674 case Bytecodes::_i2c: // fall through 1675 case Bytecodes::_i2s: tos_in = itos; break; 1676 case Bytecodes::_l2i: // fall through 1677 case Bytecodes::_l2f: // fall through 1678 case Bytecodes::_l2d: tos_in = ltos; break; 1679 case Bytecodes::_f2i: // fall through 1680 case Bytecodes::_f2l: // fall through 1681 case Bytecodes::_f2d: tos_in = ftos; break; 1682 case Bytecodes::_d2i: // fall through 1683 case Bytecodes::_d2l: // fall through 1684 case Bytecodes::_d2f: tos_in = dtos; break; 1685 default : ShouldNotReachHere(); 1686 } 1687 switch (bytecode()) { 1688 case Bytecodes::_l2i: // fall through 1689 case Bytecodes::_f2i: // fall through 1690 case Bytecodes::_d2i: // fall through 1691 case Bytecodes::_i2b: // fall through 1692 case Bytecodes::_i2c: // fall through 1693 case Bytecodes::_i2s: tos_out = itos; break; 1694 case Bytecodes::_i2l: // fall through 1695 case Bytecodes::_f2l: // fall through 1696 case Bytecodes::_d2l: tos_out = ltos; break; 1697 case Bytecodes::_i2f: // fall through 1698 case Bytecodes::_l2f: // fall through 1699 case Bytecodes::_d2f: tos_out = ftos; break; 1700 case Bytecodes::_i2d: // fall through 1701 case Bytecodes::_l2d: // fall through 1702 case Bytecodes::_f2d: tos_out = dtos; break; 1703 default : ShouldNotReachHere(); 1704 } 1705 transition(tos_in, tos_out); 1706 } 1707 #endif // ASSERT 1708 1709 static const int64_t is_nan = 0x8000000000000000L; 1710 1711 // Conversion 1712 switch (bytecode()) { 1713 case Bytecodes::_i2l: 1714 __ movslq(rax, rax); 1715 break; 1716 case Bytecodes::_i2f: 1717 __ cvtsi2ssl(xmm0, rax); 1718 break; 1719 case Bytecodes::_i2d: 1720 __ cvtsi2sdl(xmm0, rax); 1721 break; 1722 case Bytecodes::_i2b: 1723 __ movsbl(rax, rax); 1724 break; 1725 case Bytecodes::_i2c: 1726 __ movzwl(rax, rax); 1727 break; 1728 case Bytecodes::_i2s: 1729 __ movswl(rax, rax); 1730 break; 1731 case Bytecodes::_l2i: 1732 __ movl(rax, rax); 1733 break; 1734 case Bytecodes::_l2f: 1735 __ cvtsi2ssq(xmm0, rax); 1736 break; 1737 case Bytecodes::_l2d: 1738 __ cvtsi2sdq(xmm0, rax); 1739 break; 1740 case Bytecodes::_f2i: 1741 { 1742 Label L; 1743 __ cvttss2sil(rax, xmm0); 1744 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow? 1745 __ jcc(Assembler::notEqual, L); 1746 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1); 1747 __ bind(L); 1748 } 1749 break; 1750 case Bytecodes::_f2l: 1751 { 1752 Label L; 1753 __ cvttss2siq(rax, xmm0); 1754 // NaN or overflow/underflow? 1755 __ cmp64(rax, ExternalAddress((address) &is_nan)); 1756 __ jcc(Assembler::notEqual, L); 1757 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1); 1758 __ bind(L); 1759 } 1760 break; 1761 case Bytecodes::_f2d: 1762 __ cvtss2sd(xmm0, xmm0); 1763 break; 1764 case Bytecodes::_d2i: 1765 { 1766 Label L; 1767 __ cvttsd2sil(rax, xmm0); 1768 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow? 1769 __ jcc(Assembler::notEqual, L); 1770 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1); 1771 __ bind(L); 1772 } 1773 break; 1774 case Bytecodes::_d2l: 1775 { 1776 Label L; 1777 __ cvttsd2siq(rax, xmm0); 1778 // NaN or overflow/underflow? 1779 __ cmp64(rax, ExternalAddress((address) &is_nan)); 1780 __ jcc(Assembler::notEqual, L); 1781 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1); 1782 __ bind(L); 1783 } 1784 break; 1785 case Bytecodes::_d2f: 1786 __ cvtsd2ss(xmm0, xmm0); 1787 break; 1788 default: 1789 ShouldNotReachHere(); 1790 } 1791 #else 1792 // Checking 1793 #ifdef ASSERT 1794 { TosState tos_in = ilgl; 1795 TosState tos_out = ilgl; 1796 switch (bytecode()) { 1797 case Bytecodes::_i2l: // fall through 1798 case Bytecodes::_i2f: // fall through 1799 case Bytecodes::_i2d: // fall through 1800 case Bytecodes::_i2b: // fall through 1801 case Bytecodes::_i2c: // fall through 1802 case Bytecodes::_i2s: tos_in = itos; break; 1803 case Bytecodes::_l2i: // fall through 1804 case Bytecodes::_l2f: // fall through 1805 case Bytecodes::_l2d: tos_in = ltos; break; 1806 case Bytecodes::_f2i: // fall through 1807 case Bytecodes::_f2l: // fall through 1808 case Bytecodes::_f2d: tos_in = ftos; break; 1809 case Bytecodes::_d2i: // fall through 1810 case Bytecodes::_d2l: // fall through 1811 case Bytecodes::_d2f: tos_in = dtos; break; 1812 default : ShouldNotReachHere(); 1813 } 1814 switch (bytecode()) { 1815 case Bytecodes::_l2i: // fall through 1816 case Bytecodes::_f2i: // fall through 1817 case Bytecodes::_d2i: // fall through 1818 case Bytecodes::_i2b: // fall through 1819 case Bytecodes::_i2c: // fall through 1820 case Bytecodes::_i2s: tos_out = itos; break; 1821 case Bytecodes::_i2l: // fall through 1822 case Bytecodes::_f2l: // fall through 1823 case Bytecodes::_d2l: tos_out = ltos; break; 1824 case Bytecodes::_i2f: // fall through 1825 case Bytecodes::_l2f: // fall through 1826 case Bytecodes::_d2f: tos_out = ftos; break; 1827 case Bytecodes::_i2d: // fall through 1828 case Bytecodes::_l2d: // fall through 1829 case Bytecodes::_f2d: tos_out = dtos; break; 1830 default : ShouldNotReachHere(); 1831 } 1832 transition(tos_in, tos_out); 1833 } 1834 #endif // ASSERT 1835 1836 // Conversion 1837 // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation) 1838 switch (bytecode()) { 1839 case Bytecodes::_i2l: 1840 __ extend_sign(rdx, rax); 1841 break; 1842 case Bytecodes::_i2f: 1843 if (UseSSE >= 1) { 1844 __ cvtsi2ssl(xmm0, rax); 1845 } else { 1846 __ push(rax); // store int on tos 1847 __ fild_s(at_rsp()); // load int to ST0 1848 __ f2ieee(); // truncate to float size 1849 __ pop(rcx); // adjust rsp 1850 } 1851 break; 1852 case Bytecodes::_i2d: 1853 if (UseSSE >= 2) { 1854 __ cvtsi2sdl(xmm0, rax); 1855 } else { 1856 __ push(rax); // add one slot for d2ieee() 1857 __ push(rax); // store int on tos 1858 __ fild_s(at_rsp()); // load int to ST0 1859 __ d2ieee(); // truncate to double size 1860 __ pop(rcx); // adjust rsp 1861 __ pop(rcx); 1862 } 1863 break; 1864 case Bytecodes::_i2b: 1865 __ shll(rax, 24); // truncate upper 24 bits 1866 __ sarl(rax, 24); // and sign-extend byte 1867 LP64_ONLY(__ movsbl(rax, rax)); 1868 break; 1869 case Bytecodes::_i2c: 1870 __ andl(rax, 0xFFFF); // truncate upper 16 bits 1871 LP64_ONLY(__ movzwl(rax, rax)); 1872 break; 1873 case Bytecodes::_i2s: 1874 __ shll(rax, 16); // truncate upper 16 bits 1875 __ sarl(rax, 16); // and sign-extend short 1876 LP64_ONLY(__ movswl(rax, rax)); 1877 break; 1878 case Bytecodes::_l2i: 1879 /* nothing to do */ 1880 break; 1881 case Bytecodes::_l2f: 1882 // On 64-bit platforms, the cvtsi2ssq instruction is used to convert 1883 // 64-bit long values to floats. On 32-bit platforms it is not possible 1884 // to use that instruction with 64-bit operands, therefore the FPU is 1885 // used to perform the conversion. 1886 __ push(rdx); // store long on tos 1887 __ push(rax); 1888 __ fild_d(at_rsp()); // load long to ST0 1889 __ f2ieee(); // truncate to float size 1890 __ pop(rcx); // adjust rsp 1891 __ pop(rcx); 1892 if (UseSSE >= 1) { 1893 __ push_f(); 1894 __ pop_f(xmm0); 1895 } 1896 break; 1897 case Bytecodes::_l2d: 1898 // On 32-bit platforms the FPU is used for conversion because on 1899 // 32-bit platforms it is not not possible to use the cvtsi2sdq 1900 // instruction with 64-bit operands. 1901 __ push(rdx); // store long on tos 1902 __ push(rax); 1903 __ fild_d(at_rsp()); // load long to ST0 1904 __ d2ieee(); // truncate to double size 1905 __ pop(rcx); // adjust rsp 1906 __ pop(rcx); 1907 if (UseSSE >= 2) { 1908 __ push_d(); 1909 __ pop_d(xmm0); 1910 } 1911 break; 1912 case Bytecodes::_f2i: 1913 // SharedRuntime::f2i does not differentiate between sNaNs and qNaNs 1914 // as it returns 0 for any NaN. 1915 if (UseSSE >= 1) { 1916 __ push_f(xmm0); 1917 } else { 1918 __ push(rcx); // reserve space for argument 1919 __ fstp_s(at_rsp()); // pass float argument on stack 1920 } 1921 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1); 1922 break; 1923 case Bytecodes::_f2l: 1924 // SharedRuntime::f2l does not differentiate between sNaNs and qNaNs 1925 // as it returns 0 for any NaN. 1926 if (UseSSE >= 1) { 1927 __ push_f(xmm0); 1928 } else { 1929 __ push(rcx); // reserve space for argument 1930 __ fstp_s(at_rsp()); // pass float argument on stack 1931 } 1932 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1); 1933 break; 1934 case Bytecodes::_f2d: 1935 if (UseSSE < 1) { 1936 /* nothing to do */ 1937 } else if (UseSSE == 1) { 1938 __ push_f(xmm0); 1939 __ pop_f(); 1940 } else { // UseSSE >= 2 1941 __ cvtss2sd(xmm0, xmm0); 1942 } 1943 break; 1944 case Bytecodes::_d2i: 1945 if (UseSSE >= 2) { 1946 __ push_d(xmm0); 1947 } else { 1948 __ push(rcx); // reserve space for argument 1949 __ push(rcx); 1950 __ fstp_d(at_rsp()); // pass double argument on stack 1951 } 1952 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2); 1953 break; 1954 case Bytecodes::_d2l: 1955 if (UseSSE >= 2) { 1956 __ push_d(xmm0); 1957 } else { 1958 __ push(rcx); // reserve space for argument 1959 __ push(rcx); 1960 __ fstp_d(at_rsp()); // pass double argument on stack 1961 } 1962 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2); 1963 break; 1964 case Bytecodes::_d2f: 1965 if (UseSSE <= 1) { 1966 __ push(rcx); // reserve space for f2ieee() 1967 __ f2ieee(); // truncate to float size 1968 __ pop(rcx); // adjust rsp 1969 if (UseSSE == 1) { 1970 // The cvtsd2ss instruction is not available if UseSSE==1, therefore 1971 // the conversion is performed using the FPU in this case. 1972 __ push_f(); 1973 __ pop_f(xmm0); 1974 } 1975 } else { // UseSSE >= 2 1976 __ cvtsd2ss(xmm0, xmm0); 1977 } 1978 break; 1979 default : 1980 ShouldNotReachHere(); 1981 } 1982 #endif 1983 } 1984 1985 void TemplateTable::lcmp() { 1986 transition(ltos, itos); 1987 #ifdef _LP64 1988 Label done; 1989 __ pop_l(rdx); 1990 __ cmpq(rdx, rax); 1991 __ movl(rax, -1); 1992 __ jccb(Assembler::less, done); 1993 __ setb(Assembler::notEqual, rax); 1994 __ movzbl(rax, rax); 1995 __ bind(done); 1996 #else 1997 1998 // y = rdx:rax 1999 __ pop_l(rbx, rcx); // get x = rcx:rbx 2000 __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y) 2001 __ mov(rax, rcx); 2002 #endif 2003 } 2004 2005 void TemplateTable::float_cmp(bool is_float, int unordered_result) { 2006 if ((is_float && UseSSE >= 1) || 2007 (!is_float && UseSSE >= 2)) { 2008 Label done; 2009 if (is_float) { 2010 // XXX get rid of pop here, use ... reg, mem32 2011 __ pop_f(xmm1); 2012 __ ucomiss(xmm1, xmm0); 2013 } else { 2014 // XXX get rid of pop here, use ... reg, mem64 2015 __ pop_d(xmm1); 2016 __ ucomisd(xmm1, xmm0); 2017 } 2018 if (unordered_result < 0) { 2019 __ movl(rax, -1); 2020 __ jccb(Assembler::parity, done); 2021 __ jccb(Assembler::below, done); 2022 __ setb(Assembler::notEqual, rdx); 2023 __ movzbl(rax, rdx); 2024 } else { 2025 __ movl(rax, 1); 2026 __ jccb(Assembler::parity, done); 2027 __ jccb(Assembler::above, done); 2028 __ movl(rax, 0); 2029 __ jccb(Assembler::equal, done); 2030 __ decrementl(rax); 2031 } 2032 __ bind(done); 2033 } else { 2034 #ifdef _LP64 2035 ShouldNotReachHere(); 2036 #else 2037 if (is_float) { 2038 __ fld_s(at_rsp()); 2039 } else { 2040 __ fld_d(at_rsp()); 2041 __ pop(rdx); 2042 } 2043 __ pop(rcx); 2044 __ fcmp2int(rax, unordered_result < 0); 2045 #endif // _LP64 2046 } 2047 } 2048 2049 void TemplateTable::branch(bool is_jsr, bool is_wide) { 2050 __ get_method(rcx); // rcx holds method 2051 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx 2052 // holds bumped taken count 2053 2054 const ByteSize be_offset = MethodCounters::backedge_counter_offset() + 2055 InvocationCounter::counter_offset(); 2056 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() + 2057 InvocationCounter::counter_offset(); 2058 2059 // Load up edx with the branch displacement 2060 if (is_wide) { 2061 __ movl(rdx, at_bcp(1)); 2062 } else { 2063 __ load_signed_short(rdx, at_bcp(1)); 2064 } 2065 __ bswapl(rdx); 2066 2067 if (!is_wide) { 2068 __ sarl(rdx, 16); 2069 } 2070 LP64_ONLY(__ movl2ptr(rdx, rdx)); 2071 2072 // Handle all the JSR stuff here, then exit. 2073 // It's much shorter and cleaner than intermingling with the non-JSR 2074 // normal-branch stuff occurring below. 2075 if (is_jsr) { 2076 // Pre-load the next target bytecode into rbx 2077 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1, 0)); 2078 2079 // compute return address as bci in rax 2080 __ lea(rax, at_bcp((is_wide ? 5 : 3) - 2081 in_bytes(ConstMethod::codes_offset()))); 2082 __ subptr(rax, Address(rcx, Method::const_offset())); 2083 // Adjust the bcp in r13 by the displacement in rdx 2084 __ addptr(rbcp, rdx); 2085 // jsr returns atos that is not an oop 2086 __ push_i(rax); 2087 __ dispatch_only(vtos); 2088 return; 2089 } 2090 2091 // Normal (non-jsr) branch handling 2092 2093 // Adjust the bcp in r13 by the displacement in rdx 2094 __ addptr(rbcp, rdx); 2095 2096 assert(UseLoopCounter || !UseOnStackReplacement, 2097 "on-stack-replacement requires loop counters"); 2098 Label backedge_counter_overflow; 2099 Label profile_method; 2100 Label dispatch; 2101 if (UseLoopCounter) { 2102 // increment backedge counter for backward branches 2103 // rax: MDO 2104 // rbx: MDO bumped taken-count 2105 // rcx: method 2106 // rdx: target offset 2107 // r13: target bcp 2108 // r14: locals pointer 2109 __ testl(rdx, rdx); // check if forward or backward branch 2110 __ jcc(Assembler::positive, dispatch); // count only if backward branch 2111 2112 // check if MethodCounters exists 2113 Label has_counters; 2114 __ movptr(rax, Address(rcx, Method::method_counters_offset())); 2115 __ testptr(rax, rax); 2116 __ jcc(Assembler::notZero, has_counters); 2117 __ push(rdx); 2118 __ push(rcx); 2119 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::build_method_counters), 2120 rcx); 2121 __ pop(rcx); 2122 __ pop(rdx); 2123 __ movptr(rax, Address(rcx, Method::method_counters_offset())); 2124 __ testptr(rax, rax); 2125 __ jcc(Assembler::zero, dispatch); 2126 __ bind(has_counters); 2127 2128 if (TieredCompilation) { 2129 Label no_mdo; 2130 int increment = InvocationCounter::count_increment; 2131 if (ProfileInterpreter) { 2132 // Are we profiling? 2133 __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset()))); 2134 __ testptr(rbx, rbx); 2135 __ jccb(Assembler::zero, no_mdo); 2136 // Increment the MDO backedge counter 2137 const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) + 2138 in_bytes(InvocationCounter::counter_offset())); 2139 const Address mask(rbx, in_bytes(MethodData::backedge_mask_offset())); 2140 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, 2141 rax, false, Assembler::zero, &backedge_counter_overflow); 2142 __ jmp(dispatch); 2143 } 2144 __ bind(no_mdo); 2145 // Increment backedge counter in MethodCounters* 2146 __ movptr(rcx, Address(rcx, Method::method_counters_offset())); 2147 const Address mask(rcx, in_bytes(MethodCounters::backedge_mask_offset())); 2148 __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask, 2149 rax, false, Assembler::zero, &backedge_counter_overflow); 2150 } else { // not TieredCompilation 2151 // increment counter 2152 __ movptr(rcx, Address(rcx, Method::method_counters_offset())); 2153 __ movl(rax, Address(rcx, be_offset)); // load backedge counter 2154 __ incrementl(rax, InvocationCounter::count_increment); // increment counter 2155 __ movl(Address(rcx, be_offset), rax); // store counter 2156 2157 __ movl(rax, Address(rcx, inv_offset)); // load invocation counter 2158 2159 __ andl(rax, InvocationCounter::count_mask_value); // and the status bits 2160 __ addl(rax, Address(rcx, be_offset)); // add both counters 2161 2162 if (ProfileInterpreter) { 2163 // Test to see if we should create a method data oop 2164 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 2165 __ jcc(Assembler::less, dispatch); 2166 2167 // if no method data exists, go to profile method 2168 __ test_method_data_pointer(rax, profile_method); 2169 2170 if (UseOnStackReplacement) { 2171 // check for overflow against rbx which is the MDO taken count 2172 __ cmp32(rbx, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()))); 2173 __ jcc(Assembler::below, dispatch); 2174 2175 // When ProfileInterpreter is on, the backedge_count comes 2176 // from the MethodData*, which value does not get reset on 2177 // the call to frequency_counter_overflow(). To avoid 2178 // excessive calls to the overflow routine while the method is 2179 // being compiled, add a second test to make sure the overflow 2180 // function is called only once every overflow_frequency. 2181 const int overflow_frequency = 1024; 2182 __ andl(rbx, overflow_frequency - 1); 2183 __ jcc(Assembler::zero, backedge_counter_overflow); 2184 2185 } 2186 } else { 2187 if (UseOnStackReplacement) { 2188 // check for overflow against rax, which is the sum of the 2189 // counters 2190 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()))); 2191 __ jcc(Assembler::aboveEqual, backedge_counter_overflow); 2192 2193 } 2194 } 2195 } 2196 __ bind(dispatch); 2197 } 2198 2199 // Pre-load the next target bytecode into rbx 2200 __ load_unsigned_byte(rbx, Address(rbcp, 0)); 2201 2202 // continue with the bytecode @ target 2203 // rax: return bci for jsr's, unused otherwise 2204 // rbx: target bytecode 2205 // r13: target bcp 2206 __ dispatch_only(vtos); 2207 2208 if (UseLoopCounter) { 2209 if (ProfileInterpreter) { 2210 // Out-of-line code to allocate method data oop. 2211 __ bind(profile_method); 2212 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 2213 __ load_unsigned_byte(rbx, Address(rbcp, 0)); // restore target bytecode 2214 __ set_method_data_pointer_for_bcp(); 2215 __ jmp(dispatch); 2216 } 2217 2218 if (UseOnStackReplacement) { 2219 // invocation counter overflow 2220 __ bind(backedge_counter_overflow); 2221 __ negptr(rdx); 2222 __ addptr(rdx, rbcp); // branch bcp 2223 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp) 2224 __ call_VM(noreg, 2225 CAST_FROM_FN_PTR(address, 2226 InterpreterRuntime::frequency_counter_overflow), 2227 rdx); 2228 __ load_unsigned_byte(rbx, Address(rbcp, 0)); // restore target bytecode 2229 2230 // rax: osr nmethod (osr ok) or NULL (osr not possible) 2231 // rbx: target bytecode 2232 // rdx: scratch 2233 // r14: locals pointer 2234 // r13: bcp 2235 __ testptr(rax, rax); // test result 2236 __ jcc(Assembler::zero, dispatch); // no osr if null 2237 // nmethod may have been invalidated (VM may block upon call_VM return) 2238 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use); 2239 __ jcc(Assembler::notEqual, dispatch); 2240 2241 // We have the address of an on stack replacement routine in rax 2242 // We need to prepare to execute the OSR method. First we must 2243 // migrate the locals and monitors off of the stack. 2244 2245 LP64_ONLY(__ mov(r13, rax)); // save the nmethod 2246 NOT_LP64(__ mov(rbx, rax)); // save the nmethod 2247 NOT_LP64(__ get_thread(rcx)); 2248 2249 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin)); 2250 2251 // rax is OSR buffer, move it to expected parameter location 2252 LP64_ONLY(__ mov(j_rarg0, rax)); 2253 NOT_LP64(__ mov(rcx, rax)); 2254 // We use j_rarg definitions here so that registers don't conflict as parameter 2255 // registers change across platforms as we are in the midst of a calling 2256 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters. 2257 2258 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi); 2259 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx); 2260 2261 2262 // pop the interpreter frame 2263 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 2264 __ leave(); // remove frame anchor 2265 __ pop(retaddr); // get return address 2266 __ mov(rsp, sender_sp); // set sp to sender sp 2267 // Ensure compiled code always sees stack at proper alignment 2268 __ andptr(rsp, -(StackAlignmentInBytes)); 2269 2270 // unlike x86 we need no specialized return from compiled code 2271 // to the interpreter or the call stub. 2272 2273 // push the return address 2274 __ push(retaddr); 2275 2276 // and begin the OSR nmethod 2277 LP64_ONLY(__ jmp(Address(r13, nmethod::osr_entry_point_offset()))); 2278 NOT_LP64(__ jmp(Address(rbx, nmethod::osr_entry_point_offset()))); 2279 } 2280 } 2281 } 2282 2283 void TemplateTable::if_0cmp(Condition cc) { 2284 transition(itos, vtos); 2285 // assume branch is more often taken than not (loops use backward branches) 2286 Label not_taken; 2287 __ testl(rax, rax); 2288 __ jcc(j_not(cc), not_taken); 2289 branch(false, false); 2290 __ bind(not_taken); 2291 __ profile_not_taken_branch(rax); 2292 } 2293 2294 void TemplateTable::if_icmp(Condition cc) { 2295 transition(itos, vtos); 2296 // assume branch is more often taken than not (loops use backward branches) 2297 Label not_taken; 2298 __ pop_i(rdx); 2299 __ cmpl(rdx, rax); 2300 __ jcc(j_not(cc), not_taken); 2301 branch(false, false); 2302 __ bind(not_taken); 2303 __ profile_not_taken_branch(rax); 2304 } 2305 2306 void TemplateTable::if_nullcmp(Condition cc) { 2307 transition(atos, vtos); 2308 // assume branch is more often taken than not (loops use backward branches) 2309 Label not_taken; 2310 __ testptr(rax, rax); 2311 __ jcc(j_not(cc), not_taken); 2312 branch(false, false); 2313 __ bind(not_taken); 2314 __ profile_not_taken_branch(rax); 2315 } 2316 2317 void TemplateTable::if_acmp(Condition cc) { 2318 transition(atos, vtos); 2319 // assume branch is more often taken than not (loops use backward branches) 2320 Label not_taken; 2321 __ pop_ptr(rdx); 2322 __ cmpptr(rdx, rax); 2323 __ jcc(j_not(cc), not_taken); 2324 branch(false, false); 2325 __ bind(not_taken); 2326 __ profile_not_taken_branch(rax); 2327 } 2328 2329 void TemplateTable::ret() { 2330 transition(vtos, vtos); 2331 locals_index(rbx); 2332 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp 2333 NOT_LP64(__ movptr(rbx, iaddress(rbx))); 2334 __ profile_ret(rbx, rcx); 2335 __ get_method(rax); 2336 __ movptr(rbcp, Address(rax, Method::const_offset())); 2337 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, 2338 ConstMethod::codes_offset())); 2339 __ dispatch_next(vtos); 2340 } 2341 2342 void TemplateTable::wide_ret() { 2343 transition(vtos, vtos); 2344 locals_index_wide(rbx); 2345 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp 2346 __ profile_ret(rbx, rcx); 2347 __ get_method(rax); 2348 __ movptr(rbcp, Address(rax, Method::const_offset())); 2349 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset())); 2350 __ dispatch_next(vtos); 2351 } 2352 2353 void TemplateTable::tableswitch() { 2354 Label default_case, continue_execution; 2355 transition(itos, vtos); 2356 2357 // align r13/rsi 2358 __ lea(rbx, at_bcp(BytesPerInt)); 2359 __ andptr(rbx, -BytesPerInt); 2360 // load lo & hi 2361 __ movl(rcx, Address(rbx, BytesPerInt)); 2362 __ movl(rdx, Address(rbx, 2 * BytesPerInt)); 2363 __ bswapl(rcx); 2364 __ bswapl(rdx); 2365 // check against lo & hi 2366 __ cmpl(rax, rcx); 2367 __ jcc(Assembler::less, default_case); 2368 __ cmpl(rax, rdx); 2369 __ jcc(Assembler::greater, default_case); 2370 // lookup dispatch offset 2371 __ subl(rax, rcx); 2372 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt)); 2373 __ profile_switch_case(rax, rbx, rcx); 2374 // continue execution 2375 __ bind(continue_execution); 2376 __ bswapl(rdx); 2377 LP64_ONLY(__ movl2ptr(rdx, rdx)); 2378 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1)); 2379 __ addptr(rbcp, rdx); 2380 __ dispatch_only(vtos); 2381 // handle default 2382 __ bind(default_case); 2383 __ profile_switch_default(rax); 2384 __ movl(rdx, Address(rbx, 0)); 2385 __ jmp(continue_execution); 2386 } 2387 2388 void TemplateTable::lookupswitch() { 2389 transition(itos, itos); 2390 __ stop("lookupswitch bytecode should have been rewritten"); 2391 } 2392 2393 void TemplateTable::fast_linearswitch() { 2394 transition(itos, vtos); 2395 Label loop_entry, loop, found, continue_execution; 2396 // bswap rax so we can avoid bswapping the table entries 2397 __ bswapl(rax); 2398 // align r13 2399 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of 2400 // this instruction (change offsets 2401 // below) 2402 __ andptr(rbx, -BytesPerInt); 2403 // set counter 2404 __ movl(rcx, Address(rbx, BytesPerInt)); 2405 __ bswapl(rcx); 2406 __ jmpb(loop_entry); 2407 // table search 2408 __ bind(loop); 2409 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt)); 2410 __ jcc(Assembler::equal, found); 2411 __ bind(loop_entry); 2412 __ decrementl(rcx); 2413 __ jcc(Assembler::greaterEqual, loop); 2414 // default case 2415 __ profile_switch_default(rax); 2416 __ movl(rdx, Address(rbx, 0)); 2417 __ jmp(continue_execution); 2418 // entry found -> get offset 2419 __ bind(found); 2420 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt)); 2421 __ profile_switch_case(rcx, rax, rbx); 2422 // continue execution 2423 __ bind(continue_execution); 2424 __ bswapl(rdx); 2425 __ movl2ptr(rdx, rdx); 2426 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1)); 2427 __ addptr(rbcp, rdx); 2428 __ dispatch_only(vtos); 2429 } 2430 2431 void TemplateTable::fast_binaryswitch() { 2432 transition(itos, vtos); 2433 // Implementation using the following core algorithm: 2434 // 2435 // int binary_search(int key, LookupswitchPair* array, int n) { 2436 // // Binary search according to "Methodik des Programmierens" by 2437 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985. 2438 // int i = 0; 2439 // int j = n; 2440 // while (i+1 < j) { 2441 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q) 2442 // // with Q: for all i: 0 <= i < n: key < a[i] 2443 // // where a stands for the array and assuming that the (inexisting) 2444 // // element a[n] is infinitely big. 2445 // int h = (i + j) >> 1; 2446 // // i < h < j 2447 // if (key < array[h].fast_match()) { 2448 // j = h; 2449 // } else { 2450 // i = h; 2451 // } 2452 // } 2453 // // R: a[i] <= key < a[i+1] or Q 2454 // // (i.e., if key is within array, i is the correct index) 2455 // return i; 2456 // } 2457 2458 // Register allocation 2459 const Register key = rax; // already set (tosca) 2460 const Register array = rbx; 2461 const Register i = rcx; 2462 const Register j = rdx; 2463 const Register h = rdi; 2464 const Register temp = rsi; 2465 2466 // Find array start 2467 NOT_LP64(__ save_bcp()); 2468 2469 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to 2470 // get rid of this 2471 // instruction (change 2472 // offsets below) 2473 __ andptr(array, -BytesPerInt); 2474 2475 // Initialize i & j 2476 __ xorl(i, i); // i = 0; 2477 __ movl(j, Address(array, -BytesPerInt)); // j = length(array); 2478 2479 // Convert j into native byteordering 2480 __ bswapl(j); 2481 2482 // And start 2483 Label entry; 2484 __ jmp(entry); 2485 2486 // binary search loop 2487 { 2488 Label loop; 2489 __ bind(loop); 2490 // int h = (i + j) >> 1; 2491 __ leal(h, Address(i, j, Address::times_1)); // h = i + j; 2492 __ sarl(h, 1); // h = (i + j) >> 1; 2493 // if (key < array[h].fast_match()) { 2494 // j = h; 2495 // } else { 2496 // i = h; 2497 // } 2498 // Convert array[h].match to native byte-ordering before compare 2499 __ movl(temp, Address(array, h, Address::times_8)); 2500 __ bswapl(temp); 2501 __ cmpl(key, temp); 2502 // j = h if (key < array[h].fast_match()) 2503 __ cmov32(Assembler::less, j, h); 2504 // i = h if (key >= array[h].fast_match()) 2505 __ cmov32(Assembler::greaterEqual, i, h); 2506 // while (i+1 < j) 2507 __ bind(entry); 2508 __ leal(h, Address(i, 1)); // i+1 2509 __ cmpl(h, j); // i+1 < j 2510 __ jcc(Assembler::less, loop); 2511 } 2512 2513 // end of binary search, result index is i (must check again!) 2514 Label default_case; 2515 // Convert array[i].match to native byte-ordering before compare 2516 __ movl(temp, Address(array, i, Address::times_8)); 2517 __ bswapl(temp); 2518 __ cmpl(key, temp); 2519 __ jcc(Assembler::notEqual, default_case); 2520 2521 // entry found -> j = offset 2522 __ movl(j , Address(array, i, Address::times_8, BytesPerInt)); 2523 __ profile_switch_case(i, key, array); 2524 __ bswapl(j); 2525 LP64_ONLY(__ movslq(j, j)); 2526 2527 NOT_LP64(__ restore_bcp()); 2528 NOT_LP64(__ restore_locals()); // restore rdi 2529 2530 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1)); 2531 __ addptr(rbcp, j); 2532 __ dispatch_only(vtos); 2533 2534 // default case -> j = default offset 2535 __ bind(default_case); 2536 __ profile_switch_default(i); 2537 __ movl(j, Address(array, -2 * BytesPerInt)); 2538 __ bswapl(j); 2539 LP64_ONLY(__ movslq(j, j)); 2540 2541 NOT_LP64(__ restore_bcp()); 2542 NOT_LP64(__ restore_locals()); 2543 2544 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1)); 2545 __ addptr(rbcp, j); 2546 __ dispatch_only(vtos); 2547 } 2548 2549 void TemplateTable::_return(TosState state) { 2550 transition(state, state); 2551 2552 assert(_desc->calls_vm(), 2553 "inconsistent calls_vm information"); // call in remove_activation 2554 2555 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) { 2556 assert(state == vtos, "only valid state"); 2557 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax); 2558 __ movptr(robj, aaddress(0)); 2559 __ load_klass(rdi, robj); 2560 __ movl(rdi, Address(rdi, Klass::access_flags_offset())); 2561 __ testl(rdi, JVM_ACC_HAS_FINALIZER); 2562 Label skip_register_finalizer; 2563 __ jcc(Assembler::zero, skip_register_finalizer); 2564 2565 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj); 2566 2567 __ bind(skip_register_finalizer); 2568 } 2569 2570 // Narrow result if state is itos but result type is smaller. 2571 // Need to narrow in the return bytecode rather than in generate_return_entry 2572 // since compiled code callers expect the result to already be narrowed. 2573 if (state == itos) { 2574 __ narrow(rax); 2575 } 2576 __ remove_activation(state, rbcp); 2577 2578 __ jmp(rbcp); 2579 } 2580 2581 // ---------------------------------------------------------------------------- 2582 // Volatile variables demand their effects be made known to all CPU's 2583 // in order. Store buffers on most chips allow reads & writes to 2584 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode 2585 // without some kind of memory barrier (i.e., it's not sufficient that 2586 // the interpreter does not reorder volatile references, the hardware 2587 // also must not reorder them). 2588 // 2589 // According to the new Java Memory Model (JMM): 2590 // (1) All volatiles are serialized wrt to each other. ALSO reads & 2591 // writes act as aquire & release, so: 2592 // (2) A read cannot let unrelated NON-volatile memory refs that 2593 // happen after the read float up to before the read. It's OK for 2594 // non-volatile memory refs that happen before the volatile read to 2595 // float down below it. 2596 // (3) Similar a volatile write cannot let unrelated NON-volatile 2597 // memory refs that happen BEFORE the write float down to after the 2598 // write. It's OK for non-volatile memory refs that happen after the 2599 // volatile write to float up before it. 2600 // 2601 // We only put in barriers around volatile refs (they are expensive), 2602 // not _between_ memory refs (that would require us to track the 2603 // flavor of the previous memory refs). Requirements (2) and (3) 2604 // require some barriers before volatile stores and after volatile 2605 // loads. These nearly cover requirement (1) but miss the 2606 // volatile-store-volatile-load case. This final case is placed after 2607 // volatile-stores although it could just as well go before 2608 // volatile-loads. 2609 2610 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) { 2611 // Helper function to insert a is-volatile test and memory barrier 2612 if(!os::is_MP()) return; // Not needed on single CPU 2613 __ membar(order_constraint); 2614 } 2615 2616 void TemplateTable::resolve_cache_and_index(int byte_no, 2617 Register Rcache, 2618 Register index, 2619 size_t index_size) { 2620 const Register temp = rbx; 2621 assert_different_registers(Rcache, index, temp); 2622 2623 Label resolved; 2624 2625 Bytecodes::Code code = bytecode(); 2626 switch (code) { 2627 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break; 2628 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break; 2629 } 2630 2631 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 2632 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size); 2633 __ cmpl(temp, code); // have we resolved this bytecode? 2634 __ jcc(Assembler::equal, resolved); 2635 2636 // resolve first time through 2637 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache); 2638 __ movl(temp, code); 2639 __ call_VM(noreg, entry, temp); 2640 // Update registers with resolved info 2641 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); 2642 __ bind(resolved); 2643 } 2644 2645 // The cache and index registers must be set before call 2646 void TemplateTable::load_field_cp_cache_entry(Register obj, 2647 Register cache, 2648 Register index, 2649 Register off, 2650 Register flags, 2651 bool is_static = false) { 2652 assert_different_registers(cache, index, flags, off); 2653 2654 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2655 // Field offset 2656 __ movptr(off, Address(cache, index, Address::times_ptr, 2657 in_bytes(cp_base_offset + 2658 ConstantPoolCacheEntry::f2_offset()))); 2659 // Flags 2660 __ movl(flags, Address(cache, index, Address::times_ptr, 2661 in_bytes(cp_base_offset + 2662 ConstantPoolCacheEntry::flags_offset()))); 2663 2664 // klass overwrite register 2665 if (is_static) { 2666 __ movptr(obj, Address(cache, index, Address::times_ptr, 2667 in_bytes(cp_base_offset + 2668 ConstantPoolCacheEntry::f1_offset()))); 2669 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 2670 __ movptr(obj, Address(obj, mirror_offset)); 2671 } 2672 } 2673 2674 void TemplateTable::load_invoke_cp_cache_entry(int byte_no, 2675 Register method, 2676 Register itable_index, 2677 Register flags, 2678 bool is_invokevirtual, 2679 bool is_invokevfinal, /*unused*/ 2680 bool is_invokedynamic) { 2681 // setup registers 2682 const Register cache = rcx; 2683 const Register index = rdx; 2684 assert_different_registers(method, flags); 2685 assert_different_registers(method, cache, index); 2686 assert_different_registers(itable_index, flags); 2687 assert_different_registers(itable_index, cache, index); 2688 // determine constant pool cache field offsets 2689 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant"); 2690 const int method_offset = in_bytes( 2691 ConstantPoolCache::base_offset() + 2692 ((byte_no == f2_byte) 2693 ? ConstantPoolCacheEntry::f2_offset() 2694 : ConstantPoolCacheEntry::f1_offset())); 2695 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + 2696 ConstantPoolCacheEntry::flags_offset()); 2697 // access constant pool cache fields 2698 const int index_offset = in_bytes(ConstantPoolCache::base_offset() + 2699 ConstantPoolCacheEntry::f2_offset()); 2700 2701 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2)); 2702 resolve_cache_and_index(byte_no, cache, index, index_size); 2703 __ movptr(method, Address(cache, index, Address::times_ptr, method_offset)); 2704 2705 if (itable_index != noreg) { 2706 // pick up itable or appendix index from f2 also: 2707 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset)); 2708 } 2709 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset)); 2710 } 2711 2712 // The registers cache and index expected to be set before call. 2713 // Correct values of the cache and index registers are preserved. 2714 void TemplateTable::jvmti_post_field_access(Register cache, 2715 Register index, 2716 bool is_static, 2717 bool has_tos) { 2718 if (JvmtiExport::can_post_field_access()) { 2719 // Check to see if a field access watch has been set before we take 2720 // the time to call into the VM. 2721 Label L1; 2722 assert_different_registers(cache, index, rax); 2723 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 2724 __ testl(rax,rax); 2725 __ jcc(Assembler::zero, L1); 2726 2727 // cache entry pointer 2728 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 2729 __ shll(index, LogBytesPerWord); 2730 __ addptr(cache, index); 2731 if (is_static) { 2732 __ xorptr(rax, rax); // NULL object reference 2733 } else { 2734 __ pop(atos); // Get the object 2735 __ verify_oop(rax); 2736 __ push(atos); // Restore stack state 2737 } 2738 // rax,: object pointer or NULL 2739 // cache: cache entry pointer 2740 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), 2741 rax, cache); 2742 __ get_cache_and_index_at_bcp(cache, index, 1); 2743 __ bind(L1); 2744 } 2745 } 2746 2747 void TemplateTable::pop_and_check_object(Register r) { 2748 __ pop_ptr(r); 2749 __ null_check(r); // for field access must check obj. 2750 __ verify_oop(r); 2751 } 2752 2753 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 2754 transition(vtos, vtos); 2755 2756 const Register cache = rcx; 2757 const Register index = rdx; 2758 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 2759 const Register off = rbx; 2760 const Register flags = rax; 2761 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them 2762 2763 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 2764 jvmti_post_field_access(cache, index, is_static, false); 2765 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 2766 2767 if (!is_static) pop_and_check_object(obj); 2768 2769 const Address field(obj, off, Address::times_1, 0*wordSize); 2770 NOT_LP64(const Address hi(obj, off, Address::times_1, 1*wordSize)); 2771 2772 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notDouble; 2773 2774 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 2775 // Make sure we don't need to mask edx after the above shift 2776 assert(btos == 0, "change code, btos != 0"); 2777 2778 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 2779 2780 __ jcc(Assembler::notZero, notByte); 2781 // btos 2782 __ load_signed_byte(rax, field); 2783 __ push(btos); 2784 // Rewrite bytecode to be faster 2785 if (!is_static && rc == may_rewrite) { 2786 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 2787 } 2788 __ jmp(Done); 2789 2790 __ bind(notByte); 2791 __ cmpl(flags, ztos); 2792 __ jcc(Assembler::notEqual, notBool); 2793 2794 // ztos (same code as btos) 2795 __ load_signed_byte(rax, field); 2796 __ push(ztos); 2797 // Rewrite bytecode to be faster 2798 if (!is_static && rc == may_rewrite) { 2799 // use btos rewriting, no truncating to t/f bit is needed for getfield. 2800 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 2801 } 2802 __ jmp(Done); 2803 2804 __ bind(notBool); 2805 __ cmpl(flags, atos); 2806 __ jcc(Assembler::notEqual, notObj); 2807 // atos 2808 __ load_heap_oop(rax, field); 2809 __ push(atos); 2810 if (!is_static && rc == may_rewrite) { 2811 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx); 2812 } 2813 __ jmp(Done); 2814 2815 __ bind(notObj); 2816 __ cmpl(flags, itos); 2817 __ jcc(Assembler::notEqual, notInt); 2818 // itos 2819 __ movl(rax, field); 2820 __ push(itos); 2821 // Rewrite bytecode to be faster 2822 if (!is_static && rc == may_rewrite) { 2823 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx); 2824 } 2825 __ jmp(Done); 2826 2827 __ bind(notInt); 2828 __ cmpl(flags, ctos); 2829 __ jcc(Assembler::notEqual, notChar); 2830 // ctos 2831 __ load_unsigned_short(rax, field); 2832 __ push(ctos); 2833 // Rewrite bytecode to be faster 2834 if (!is_static && rc == may_rewrite) { 2835 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx); 2836 } 2837 __ jmp(Done); 2838 2839 __ bind(notChar); 2840 __ cmpl(flags, stos); 2841 __ jcc(Assembler::notEqual, notShort); 2842 // stos 2843 __ load_signed_short(rax, field); 2844 __ push(stos); 2845 // Rewrite bytecode to be faster 2846 if (!is_static && rc == may_rewrite) { 2847 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx); 2848 } 2849 __ jmp(Done); 2850 2851 __ bind(notShort); 2852 __ cmpl(flags, ltos); 2853 __ jcc(Assembler::notEqual, notLong); 2854 // ltos 2855 2856 #ifndef _LP64 2857 // Generate code as if volatile. There just aren't enough registers to 2858 // save that information and this code is faster than the test. 2859 __ fild_d(field); // Must load atomically 2860 __ subptr(rsp,2*wordSize); // Make space for store 2861 __ fistp_d(Address(rsp,0)); 2862 __ pop(rax); 2863 __ pop(rdx); 2864 #else 2865 __ movq(rax, field); 2866 #endif 2867 2868 __ push(ltos); 2869 // Rewrite bytecode to be faster 2870 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx)); 2871 __ jmp(Done); 2872 2873 __ bind(notLong); 2874 __ cmpl(flags, ftos); 2875 __ jcc(Assembler::notEqual, notFloat); 2876 // ftos 2877 2878 __ load_float(field); 2879 __ push(ftos); 2880 // Rewrite bytecode to be faster 2881 if (!is_static && rc == may_rewrite) { 2882 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx); 2883 } 2884 __ jmp(Done); 2885 2886 __ bind(notFloat); 2887 #ifdef ASSERT 2888 __ cmpl(flags, dtos); 2889 __ jcc(Assembler::notEqual, notDouble); 2890 #endif 2891 // dtos 2892 __ load_double(field); 2893 __ push(dtos); 2894 // Rewrite bytecode to be faster 2895 if (!is_static && rc == may_rewrite) { 2896 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx); 2897 } 2898 #ifdef ASSERT 2899 __ jmp(Done); 2900 2901 2902 __ bind(notDouble); 2903 __ stop("Bad state"); 2904 #endif 2905 2906 __ bind(Done); 2907 // [jk] not needed currently 2908 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad | 2909 // Assembler::LoadStore)); 2910 } 2911 2912 void TemplateTable::getfield(int byte_no) { 2913 getfield_or_static(byte_no, false); 2914 } 2915 2916 void TemplateTable::nofast_getfield(int byte_no) { 2917 getfield_or_static(byte_no, false, may_not_rewrite); 2918 } 2919 2920 void TemplateTable::getstatic(int byte_no) { 2921 getfield_or_static(byte_no, true); 2922 } 2923 2924 2925 // The registers cache and index expected to be set before call. 2926 // The function may destroy various registers, just not the cache and index registers. 2927 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) { 2928 2929 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax); 2930 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 2931 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 2932 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx); 2933 2934 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2935 2936 if (JvmtiExport::can_post_field_modification()) { 2937 // Check to see if a field modification watch has been set before 2938 // we take the time to call into the VM. 2939 Label L1; 2940 assert_different_registers(cache, index, rax); 2941 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 2942 __ testl(rax, rax); 2943 __ jcc(Assembler::zero, L1); 2944 2945 __ get_cache_and_index_at_bcp(robj, RDX, 1); 2946 2947 2948 if (is_static) { 2949 // Life is simple. Null out the object pointer. 2950 __ xorl(RBX, RBX); 2951 2952 } else { 2953 // Life is harder. The stack holds the value on top, followed by 2954 // the object. We don't know the size of the value, though; it 2955 // could be one or two words depending on its type. As a result, 2956 // we must find the type to determine where the object is. 2957 #ifndef _LP64 2958 Label two_word, valsize_known; 2959 #endif 2960 __ movl(RCX, Address(robj, RDX, 2961 Address::times_ptr, 2962 in_bytes(cp_base_offset + 2963 ConstantPoolCacheEntry::flags_offset()))); 2964 NOT_LP64(__ mov(rbx, rsp)); 2965 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift); 2966 2967 // Make sure we don't need to mask rcx after the above shift 2968 ConstantPoolCacheEntry::verify_tos_state_shift(); 2969 #ifdef _LP64 2970 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue 2971 __ cmpl(c_rarg3, ltos); 2972 __ cmovptr(Assembler::equal, 2973 c_rarg1, at_tos_p2()); // ltos (two word jvalue) 2974 __ cmpl(c_rarg3, dtos); 2975 __ cmovptr(Assembler::equal, 2976 c_rarg1, at_tos_p2()); // dtos (two word jvalue) 2977 #else 2978 __ cmpl(rcx, ltos); 2979 __ jccb(Assembler::equal, two_word); 2980 __ cmpl(rcx, dtos); 2981 __ jccb(Assembler::equal, two_word); 2982 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos) 2983 __ jmpb(valsize_known); 2984 2985 __ bind(two_word); 2986 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue 2987 2988 __ bind(valsize_known); 2989 // setup object pointer 2990 __ movptr(rbx, Address(rbx, 0)); 2991 #endif 2992 } 2993 // cache entry pointer 2994 __ addptr(robj, in_bytes(cp_base_offset)); 2995 __ shll(RDX, LogBytesPerWord); 2996 __ addptr(robj, RDX); 2997 // object (tos) 2998 __ mov(RCX, rsp); 2999 // c_rarg1: object pointer set up above (NULL if static) 3000 // c_rarg2: cache entry pointer 3001 // c_rarg3: jvalue object on the stack 3002 __ call_VM(noreg, 3003 CAST_FROM_FN_PTR(address, 3004 InterpreterRuntime::post_field_modification), 3005 RBX, robj, RCX); 3006 __ get_cache_and_index_at_bcp(cache, index, 1); 3007 __ bind(L1); 3008 } 3009 } 3010 3011 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 3012 transition(vtos, vtos); 3013 3014 const Register cache = rcx; 3015 const Register index = rdx; 3016 const Register obj = rcx; 3017 const Register off = rbx; 3018 const Register flags = rax; 3019 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3020 3021 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 3022 jvmti_post_field_mod(cache, index, is_static); 3023 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 3024 3025 // [jk] not needed currently 3026 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 3027 // Assembler::StoreStore)); 3028 3029 Label notVolatile, Done; 3030 __ movl(rdx, flags); 3031 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3032 __ andl(rdx, 0x1); 3033 3034 // field addresses 3035 const Address field(obj, off, Address::times_1, 0*wordSize); 3036 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);) 3037 3038 Label notByte, notBool, notInt, notShort, notChar, 3039 notLong, notFloat, notObj, notDouble; 3040 3041 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 3042 3043 assert(btos == 0, "change code, btos != 0"); 3044 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 3045 __ jcc(Assembler::notZero, notByte); 3046 3047 // btos 3048 { 3049 __ pop(btos); 3050 if (!is_static) pop_and_check_object(obj); 3051 __ movb(field, rax); 3052 if (!is_static && rc == may_rewrite) { 3053 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no); 3054 } 3055 __ jmp(Done); 3056 } 3057 3058 __ bind(notByte); 3059 __ cmpl(flags, ztos); 3060 __ jcc(Assembler::notEqual, notBool); 3061 3062 // ztos 3063 { 3064 __ pop(ztos); 3065 if (!is_static) pop_and_check_object(obj); 3066 __ andl(rax, 0x1); 3067 __ movb(field, rax); 3068 if (!is_static && rc == may_rewrite) { 3069 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no); 3070 } 3071 __ jmp(Done); 3072 } 3073 3074 __ bind(notBool); 3075 __ cmpl(flags, atos); 3076 __ jcc(Assembler::notEqual, notObj); 3077 3078 // atos 3079 { 3080 __ pop(atos); 3081 if (!is_static) pop_and_check_object(obj); 3082 // Store into the field 3083 do_oop_store(_masm, field, rax, _bs->kind(), false); 3084 if (!is_static && rc == may_rewrite) { 3085 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no); 3086 } 3087 __ jmp(Done); 3088 } 3089 3090 __ bind(notObj); 3091 __ cmpl(flags, itos); 3092 __ jcc(Assembler::notEqual, notInt); 3093 3094 // itos 3095 { 3096 __ pop(itos); 3097 if (!is_static) pop_and_check_object(obj); 3098 __ movl(field, rax); 3099 if (!is_static && rc == may_rewrite) { 3100 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no); 3101 } 3102 __ jmp(Done); 3103 } 3104 3105 __ bind(notInt); 3106 __ cmpl(flags, ctos); 3107 __ jcc(Assembler::notEqual, notChar); 3108 3109 // ctos 3110 { 3111 __ pop(ctos); 3112 if (!is_static) pop_and_check_object(obj); 3113 __ movw(field, rax); 3114 if (!is_static && rc == may_rewrite) { 3115 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no); 3116 } 3117 __ jmp(Done); 3118 } 3119 3120 __ bind(notChar); 3121 __ cmpl(flags, stos); 3122 __ jcc(Assembler::notEqual, notShort); 3123 3124 // stos 3125 { 3126 __ pop(stos); 3127 if (!is_static) pop_and_check_object(obj); 3128 __ movw(field, rax); 3129 if (!is_static && rc == may_rewrite) { 3130 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no); 3131 } 3132 __ jmp(Done); 3133 } 3134 3135 __ bind(notShort); 3136 __ cmpl(flags, ltos); 3137 __ jcc(Assembler::notEqual, notLong); 3138 3139 // ltos 3140 #ifdef _LP64 3141 { 3142 __ pop(ltos); 3143 if (!is_static) pop_and_check_object(obj); 3144 __ movq(field, rax); 3145 if (!is_static && rc == may_rewrite) { 3146 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no); 3147 } 3148 __ jmp(Done); 3149 } 3150 #else 3151 { 3152 Label notVolatileLong; 3153 __ testl(rdx, rdx); 3154 __ jcc(Assembler::zero, notVolatileLong); 3155 3156 __ pop(ltos); // overwrites rdx, do this after testing volatile. 3157 if (!is_static) pop_and_check_object(obj); 3158 3159 // Replace with real volatile test 3160 __ push(rdx); 3161 __ push(rax); // Must update atomically with FIST 3162 __ fild_d(Address(rsp,0)); // So load into FPU register 3163 __ fistp_d(field); // and put into memory atomically 3164 __ addptr(rsp, 2*wordSize); 3165 // volatile_barrier(); 3166 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3167 Assembler::StoreStore)); 3168 // Don't rewrite volatile version 3169 __ jmp(notVolatile); 3170 3171 __ bind(notVolatileLong); 3172 3173 __ pop(ltos); // overwrites rdx 3174 if (!is_static) pop_and_check_object(obj); 3175 __ movptr(hi, rdx); 3176 __ movptr(field, rax); 3177 // Don't rewrite to _fast_lputfield for potential volatile case. 3178 __ jmp(notVolatile); 3179 } 3180 #endif // _LP64 3181 3182 __ bind(notLong); 3183 __ cmpl(flags, ftos); 3184 __ jcc(Assembler::notEqual, notFloat); 3185 3186 // ftos 3187 { 3188 __ pop(ftos); 3189 if (!is_static) pop_and_check_object(obj); 3190 __ store_float(field); 3191 if (!is_static && rc == may_rewrite) { 3192 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no); 3193 } 3194 __ jmp(Done); 3195 } 3196 3197 __ bind(notFloat); 3198 #ifdef ASSERT 3199 __ cmpl(flags, dtos); 3200 __ jcc(Assembler::notEqual, notDouble); 3201 #endif 3202 3203 // dtos 3204 { 3205 __ pop(dtos); 3206 if (!is_static) pop_and_check_object(obj); 3207 __ store_double(field); 3208 if (!is_static && rc == may_rewrite) { 3209 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no); 3210 } 3211 } 3212 3213 #ifdef ASSERT 3214 __ jmp(Done); 3215 3216 __ bind(notDouble); 3217 __ stop("Bad state"); 3218 #endif 3219 3220 __ bind(Done); 3221 3222 // Check for volatile store 3223 __ testl(rdx, rdx); 3224 __ jcc(Assembler::zero, notVolatile); 3225 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3226 Assembler::StoreStore)); 3227 __ bind(notVolatile); 3228 } 3229 3230 void TemplateTable::putfield(int byte_no) { 3231 putfield_or_static(byte_no, false); 3232 } 3233 3234 void TemplateTable::nofast_putfield(int byte_no) { 3235 putfield_or_static(byte_no, false, may_not_rewrite); 3236 } 3237 3238 void TemplateTable::putstatic(int byte_no) { 3239 putfield_or_static(byte_no, true); 3240 } 3241 3242 void TemplateTable::jvmti_post_fast_field_mod() { 3243 3244 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3245 3246 if (JvmtiExport::can_post_field_modification()) { 3247 // Check to see if a field modification watch has been set before 3248 // we take the time to call into the VM. 3249 Label L2; 3250 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 3251 __ testl(scratch, scratch); 3252 __ jcc(Assembler::zero, L2); 3253 __ pop_ptr(rbx); // copy the object pointer from tos 3254 __ verify_oop(rbx); 3255 __ push_ptr(rbx); // put the object pointer back on tos 3256 // Save tos values before call_VM() clobbers them. Since we have 3257 // to do it for every data type, we use the saved values as the 3258 // jvalue object. 3259 switch (bytecode()) { // load values into the jvalue object 3260 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break; 3261 case Bytecodes::_fast_bputfield: // fall through 3262 case Bytecodes::_fast_zputfield: // fall through 3263 case Bytecodes::_fast_sputfield: // fall through 3264 case Bytecodes::_fast_cputfield: // fall through 3265 case Bytecodes::_fast_iputfield: __ push_i(rax); break; 3266 case Bytecodes::_fast_dputfield: __ push(dtos); break; 3267 case Bytecodes::_fast_fputfield: __ push(ftos); break; 3268 case Bytecodes::_fast_lputfield: __ push_l(rax); break; 3269 3270 default: 3271 ShouldNotReachHere(); 3272 } 3273 __ mov(scratch, rsp); // points to jvalue on the stack 3274 // access constant pool cache entry 3275 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1)); 3276 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1)); 3277 __ verify_oop(rbx); 3278 // rbx: object pointer copied above 3279 // c_rarg2: cache entry pointer 3280 // c_rarg3: jvalue object on the stack 3281 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3)); 3282 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx)); 3283 3284 switch (bytecode()) { // restore tos values 3285 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break; 3286 case Bytecodes::_fast_bputfield: // fall through 3287 case Bytecodes::_fast_zputfield: // fall through 3288 case Bytecodes::_fast_sputfield: // fall through 3289 case Bytecodes::_fast_cputfield: // fall through 3290 case Bytecodes::_fast_iputfield: __ pop_i(rax); break; 3291 case Bytecodes::_fast_dputfield: __ pop(dtos); break; 3292 case Bytecodes::_fast_fputfield: __ pop(ftos); break; 3293 case Bytecodes::_fast_lputfield: __ pop_l(rax); break; 3294 } 3295 __ bind(L2); 3296 } 3297 } 3298 3299 void TemplateTable::fast_storefield(TosState state) { 3300 transition(state, vtos); 3301 3302 ByteSize base = ConstantPoolCache::base_offset(); 3303 3304 jvmti_post_fast_field_mod(); 3305 3306 // access constant pool cache 3307 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 3308 3309 // test for volatile with rdx but rdx is tos register for lputfield. 3310 __ movl(rdx, Address(rcx, rbx, Address::times_ptr, 3311 in_bytes(base + 3312 ConstantPoolCacheEntry::flags_offset()))); 3313 3314 // replace index with field offset from cache entry 3315 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, 3316 in_bytes(base + ConstantPoolCacheEntry::f2_offset()))); 3317 3318 // [jk] not needed currently 3319 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 3320 // Assembler::StoreStore)); 3321 3322 Label notVolatile; 3323 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3324 __ andl(rdx, 0x1); 3325 3326 // Get object from stack 3327 pop_and_check_object(rcx); 3328 3329 // field address 3330 const Address field(rcx, rbx, Address::times_1); 3331 3332 // access field 3333 switch (bytecode()) { 3334 case Bytecodes::_fast_aputfield: 3335 do_oop_store(_masm, field, rax, _bs->kind(), false); 3336 break; 3337 case Bytecodes::_fast_lputfield: 3338 #ifdef _LP64 3339 __ movq(field, rax); 3340 #else 3341 __ stop("should not be rewritten"); 3342 #endif 3343 break; 3344 case Bytecodes::_fast_iputfield: 3345 __ movl(field, rax); 3346 break; 3347 case Bytecodes::_fast_zputfield: 3348 __ andl(rax, 0x1); // boolean is true if LSB is 1 3349 // fall through to bputfield 3350 case Bytecodes::_fast_bputfield: 3351 __ movb(field, rax); 3352 break; 3353 case Bytecodes::_fast_sputfield: 3354 // fall through 3355 case Bytecodes::_fast_cputfield: 3356 __ movw(field, rax); 3357 break; 3358 case Bytecodes::_fast_fputfield: 3359 __ store_float(field); 3360 break; 3361 case Bytecodes::_fast_dputfield: 3362 __ store_double(field); 3363 break; 3364 default: 3365 ShouldNotReachHere(); 3366 } 3367 3368 // Check for volatile store 3369 __ testl(rdx, rdx); 3370 __ jcc(Assembler::zero, notVolatile); 3371 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3372 Assembler::StoreStore)); 3373 __ bind(notVolatile); 3374 } 3375 3376 void TemplateTable::fast_accessfield(TosState state) { 3377 transition(atos, state); 3378 3379 // Do the JVMTI work here to avoid disturbing the register state below 3380 if (JvmtiExport::can_post_field_access()) { 3381 // Check to see if a field access watch has been set before we 3382 // take the time to call into the VM. 3383 Label L1; 3384 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 3385 __ testl(rcx, rcx); 3386 __ jcc(Assembler::zero, L1); 3387 // access constant pool cache entry 3388 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1)); 3389 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1)); 3390 __ verify_oop(rax); 3391 __ push_ptr(rax); // save object pointer before call_VM() clobbers it 3392 LP64_ONLY(__ mov(c_rarg1, rax)); 3393 // c_rarg1: object pointer copied above 3394 // c_rarg2: cache entry pointer 3395 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2)); 3396 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx)); 3397 __ pop_ptr(rax); // restore object pointer 3398 __ bind(L1); 3399 } 3400 3401 // access constant pool cache 3402 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 3403 // replace index with field offset from cache entry 3404 // [jk] not needed currently 3405 // if (os::is_MP()) { 3406 // __ movl(rdx, Address(rcx, rbx, Address::times_8, 3407 // in_bytes(ConstantPoolCache::base_offset() + 3408 // ConstantPoolCacheEntry::flags_offset()))); 3409 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3410 // __ andl(rdx, 0x1); 3411 // } 3412 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, 3413 in_bytes(ConstantPoolCache::base_offset() + 3414 ConstantPoolCacheEntry::f2_offset()))); 3415 3416 // rax: object 3417 __ verify_oop(rax); 3418 __ null_check(rax); 3419 Address field(rax, rbx, Address::times_1); 3420 3421 // access field 3422 switch (bytecode()) { 3423 case Bytecodes::_fast_agetfield: 3424 __ load_heap_oop(rax, field); 3425 __ verify_oop(rax); 3426 break; 3427 case Bytecodes::_fast_lgetfield: 3428 #ifdef _LP64 3429 __ movq(rax, field); 3430 #else 3431 __ stop("should not be rewritten"); 3432 #endif 3433 break; 3434 case Bytecodes::_fast_igetfield: 3435 __ movl(rax, field); 3436 break; 3437 case Bytecodes::_fast_bgetfield: 3438 __ movsbl(rax, field); 3439 break; 3440 case Bytecodes::_fast_sgetfield: 3441 __ load_signed_short(rax, field); 3442 break; 3443 case Bytecodes::_fast_cgetfield: 3444 __ load_unsigned_short(rax, field); 3445 break; 3446 case Bytecodes::_fast_fgetfield: 3447 __ load_float(field); 3448 break; 3449 case Bytecodes::_fast_dgetfield: 3450 __ load_double(field); 3451 break; 3452 default: 3453 ShouldNotReachHere(); 3454 } 3455 // [jk] not needed currently 3456 // if (os::is_MP()) { 3457 // Label notVolatile; 3458 // __ testl(rdx, rdx); 3459 // __ jcc(Assembler::zero, notVolatile); 3460 // __ membar(Assembler::LoadLoad); 3461 // __ bind(notVolatile); 3462 //}; 3463 } 3464 3465 void TemplateTable::fast_xaccess(TosState state) { 3466 transition(vtos, state); 3467 3468 // get receiver 3469 __ movptr(rax, aaddress(0)); 3470 // access constant pool cache 3471 __ get_cache_and_index_at_bcp(rcx, rdx, 2); 3472 __ movptr(rbx, 3473 Address(rcx, rdx, Address::times_ptr, 3474 in_bytes(ConstantPoolCache::base_offset() + 3475 ConstantPoolCacheEntry::f2_offset()))); 3476 // make sure exception is reported in correct bcp range (getfield is 3477 // next instruction) 3478 __ increment(rbcp); 3479 __ null_check(rax); 3480 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize); 3481 switch (state) { 3482 case itos: 3483 __ movl(rax, field); 3484 break; 3485 case atos: 3486 __ load_heap_oop(rax, field); 3487 __ verify_oop(rax); 3488 break; 3489 case ftos: 3490 __ load_float(field); 3491 break; 3492 default: 3493 ShouldNotReachHere(); 3494 } 3495 3496 // [jk] not needed currently 3497 // if (os::is_MP()) { 3498 // Label notVolatile; 3499 // __ movl(rdx, Address(rcx, rdx, Address::times_8, 3500 // in_bytes(ConstantPoolCache::base_offset() + 3501 // ConstantPoolCacheEntry::flags_offset()))); 3502 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3503 // __ testl(rdx, 0x1); 3504 // __ jcc(Assembler::zero, notVolatile); 3505 // __ membar(Assembler::LoadLoad); 3506 // __ bind(notVolatile); 3507 // } 3508 3509 __ decrement(rbcp); 3510 } 3511 3512 //----------------------------------------------------------------------------- 3513 // Calls 3514 3515 void TemplateTable::count_calls(Register method, Register temp) { 3516 // implemented elsewhere 3517 ShouldNotReachHere(); 3518 } 3519 3520 void TemplateTable::prepare_invoke(int byte_no, 3521 Register method, // linked method (or i-klass) 3522 Register index, // itable index, MethodType, etc. 3523 Register recv, // if caller wants to see it 3524 Register flags // if caller wants to test it 3525 ) { 3526 // determine flags 3527 const Bytecodes::Code code = bytecode(); 3528 const bool is_invokeinterface = code == Bytecodes::_invokeinterface; 3529 const bool is_invokedynamic = code == Bytecodes::_invokedynamic; 3530 const bool is_invokehandle = code == Bytecodes::_invokehandle; 3531 const bool is_invokevirtual = code == Bytecodes::_invokevirtual; 3532 const bool is_invokespecial = code == Bytecodes::_invokespecial; 3533 const bool load_receiver = (recv != noreg); 3534 const bool save_flags = (flags != noreg); 3535 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), ""); 3536 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal"); 3537 assert(flags == noreg || flags == rdx, ""); 3538 assert(recv == noreg || recv == rcx, ""); 3539 3540 // setup registers & access constant pool cache 3541 if (recv == noreg) recv = rcx; 3542 if (flags == noreg) flags = rdx; 3543 assert_different_registers(method, index, recv, flags); 3544 3545 // save 'interpreter return address' 3546 __ save_bcp(); 3547 3548 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic); 3549 3550 // maybe push appendix to arguments (just before return address) 3551 if (is_invokedynamic || is_invokehandle) { 3552 Label L_no_push; 3553 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift)); 3554 __ jcc(Assembler::zero, L_no_push); 3555 // Push the appendix as a trailing parameter. 3556 // This must be done before we get the receiver, 3557 // since the parameter_size includes it. 3558 __ push(rbx); 3559 __ mov(rbx, index); 3560 assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0"); 3561 __ load_resolved_reference_at_index(index, rbx); 3562 __ pop(rbx); 3563 __ push(index); // push appendix (MethodType, CallSite, etc.) 3564 __ bind(L_no_push); 3565 } 3566 3567 // load receiver if needed (after appendix is pushed so parameter size is correct) 3568 // Note: no return address pushed yet 3569 if (load_receiver) { 3570 __ movl(recv, flags); 3571 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask); 3572 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address 3573 const int receiver_is_at_end = -1; // back off one slot to get receiver 3574 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end); 3575 __ movptr(recv, recv_addr); 3576 __ verify_oop(recv); 3577 } 3578 3579 if (save_flags) { 3580 __ movl(rbcp, flags); 3581 } 3582 3583 // compute return type 3584 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 3585 // Make sure we don't need to mask flags after the above shift 3586 ConstantPoolCacheEntry::verify_tos_state_shift(); 3587 // load return address 3588 { 3589 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code); 3590 ExternalAddress table(table_addr); 3591 LP64_ONLY(__ lea(rscratch1, table)); 3592 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr))); 3593 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr)))); 3594 } 3595 3596 // push return address 3597 __ push(flags); 3598 3599 // Restore flags value from the constant pool cache, and restore rsi 3600 // for later null checks. r13 is the bytecode pointer 3601 if (save_flags) { 3602 __ movl(flags, rbcp); 3603 __ restore_bcp(); 3604 } 3605 } 3606 3607 void TemplateTable::invokevirtual_helper(Register index, 3608 Register recv, 3609 Register flags) { 3610 // Uses temporary registers rax, rdx 3611 assert_different_registers(index, recv, rax, rdx); 3612 assert(index == rbx, ""); 3613 assert(recv == rcx, ""); 3614 3615 // Test for an invoke of a final method 3616 Label notFinal; 3617 __ movl(rax, flags); 3618 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift)); 3619 __ jcc(Assembler::zero, notFinal); 3620 3621 const Register method = index; // method must be rbx 3622 assert(method == rbx, 3623 "Method* must be rbx for interpreter calling convention"); 3624 3625 // do the call - the index is actually the method to call 3626 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method* 3627 3628 // It's final, need a null check here! 3629 __ null_check(recv); 3630 3631 // profile this call 3632 __ profile_final_call(rax); 3633 __ profile_arguments_type(rax, method, rbcp, true); 3634 3635 __ jump_from_interpreted(method, rax); 3636 3637 __ bind(notFinal); 3638 3639 // get receiver klass 3640 __ null_check(recv, oopDesc::klass_offset_in_bytes()); 3641 __ load_klass(rax, recv); 3642 3643 // profile this call 3644 __ profile_virtual_call(rax, rlocals, rdx); 3645 // get target Method* & entry point 3646 __ lookup_virtual_method(rax, index, method); 3647 __ profile_called_method(method, rdx, rbcp); 3648 3649 __ profile_arguments_type(rdx, method, rbcp, true); 3650 __ jump_from_interpreted(method, rdx); 3651 } 3652 3653 void TemplateTable::invokevirtual(int byte_no) { 3654 transition(vtos, vtos); 3655 assert(byte_no == f2_byte, "use this argument"); 3656 prepare_invoke(byte_no, 3657 rbx, // method or vtable index 3658 noreg, // unused itable index 3659 rcx, rdx); // recv, flags 3660 3661 // rbx: index 3662 // rcx: receiver 3663 // rdx: flags 3664 3665 invokevirtual_helper(rbx, rcx, rdx); 3666 } 3667 3668 void TemplateTable::invokespecial(int byte_no) { 3669 transition(vtos, vtos); 3670 assert(byte_no == f1_byte, "use this argument"); 3671 prepare_invoke(byte_no, rbx, noreg, // get f1 Method* 3672 rcx); // get receiver also for null check 3673 __ verify_oop(rcx); 3674 __ null_check(rcx); 3675 // do the call 3676 __ profile_call(rax); 3677 __ profile_arguments_type(rax, rbx, rbcp, false); 3678 __ jump_from_interpreted(rbx, rax); 3679 } 3680 3681 void TemplateTable::invokestatic(int byte_no) { 3682 transition(vtos, vtos); 3683 assert(byte_no == f1_byte, "use this argument"); 3684 prepare_invoke(byte_no, rbx); // get f1 Method* 3685 // do the call 3686 __ profile_call(rax); 3687 __ profile_arguments_type(rax, rbx, rbcp, false); 3688 __ jump_from_interpreted(rbx, rax); 3689 } 3690 3691 3692 void TemplateTable::fast_invokevfinal(int byte_no) { 3693 transition(vtos, vtos); 3694 assert(byte_no == f2_byte, "use this argument"); 3695 __ stop("fast_invokevfinal not used on x86"); 3696 } 3697 3698 3699 void TemplateTable::invokeinterface(int byte_no) { 3700 transition(vtos, vtos); 3701 assert(byte_no == f1_byte, "use this argument"); 3702 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 itable index 3703 rcx, rdx); // recv, flags 3704 3705 // rax: interface klass (from f1) 3706 // rbx: itable index (from f2) 3707 // rcx: receiver 3708 // rdx: flags 3709 3710 // Special case of invokeinterface called for virtual method of 3711 // java.lang.Object. See cpCacheOop.cpp for details. 3712 // This code isn't produced by javac, but could be produced by 3713 // another compliant java compiler. 3714 Label notMethod; 3715 __ movl(rlocals, rdx); 3716 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift)); 3717 3718 __ jcc(Assembler::zero, notMethod); 3719 3720 invokevirtual_helper(rbx, rcx, rdx); 3721 __ bind(notMethod); 3722 3723 // Get receiver klass into rdx - also a null check 3724 __ restore_locals(); // restore r14 3725 __ null_check(rcx, oopDesc::klass_offset_in_bytes()); 3726 __ load_klass(rdx, rcx); 3727 3728 // profile this call 3729 __ profile_virtual_call(rdx, rbcp, rlocals); 3730 3731 Label no_such_interface, no_such_method; 3732 3733 __ lookup_interface_method(// inputs: rec. class, interface, itable index 3734 rdx, rax, rbx, 3735 // outputs: method, scan temp. reg 3736 rbx, rbcp, 3737 no_such_interface); 3738 3739 // rbx: Method* to call 3740 // rcx: receiver 3741 // Check for abstract method error 3742 // Note: This should be done more efficiently via a throw_abstract_method_error 3743 // interpreter entry point and a conditional jump to it in case of a null 3744 // method. 3745 __ testptr(rbx, rbx); 3746 __ jcc(Assembler::zero, no_such_method); 3747 3748 __ profile_called_method(rbx, rbcp, rdx); 3749 __ profile_arguments_type(rdx, rbx, rbcp, true); 3750 3751 // do the call 3752 // rcx: receiver 3753 // rbx,: Method* 3754 __ jump_from_interpreted(rbx, rdx); 3755 __ should_not_reach_here(); 3756 3757 // exception handling code follows... 3758 // note: must restore interpreter registers to canonical 3759 // state for exception handling to work correctly! 3760 3761 __ bind(no_such_method); 3762 // throw exception 3763 __ pop(rbx); // pop return address (pushed by prepare_invoke) 3764 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed) 3765 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3766 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); 3767 // the call_VM checks for exception, so we should never return here. 3768 __ should_not_reach_here(); 3769 3770 __ bind(no_such_interface); 3771 // throw exception 3772 __ pop(rbx); // pop return address (pushed by prepare_invoke) 3773 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed) 3774 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3775 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 3776 InterpreterRuntime::throw_IncompatibleClassChangeError)); 3777 // the call_VM checks for exception, so we should never return here. 3778 __ should_not_reach_here(); 3779 } 3780 3781 void TemplateTable::invokehandle(int byte_no) { 3782 transition(vtos, vtos); 3783 assert(byte_no == f1_byte, "use this argument"); 3784 const Register rbx_method = rbx; 3785 const Register rax_mtype = rax; 3786 const Register rcx_recv = rcx; 3787 const Register rdx_flags = rdx; 3788 3789 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv); 3790 __ verify_method_ptr(rbx_method); 3791 __ verify_oop(rcx_recv); 3792 __ null_check(rcx_recv); 3793 3794 // rax: MethodType object (from cpool->resolved_references[f1], if necessary) 3795 // rbx: MH.invokeExact_MT method (from f2) 3796 3797 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke 3798 3799 // FIXME: profile the LambdaForm also 3800 __ profile_final_call(rax); 3801 __ profile_arguments_type(rdx, rbx_method, rbcp, true); 3802 3803 __ jump_from_interpreted(rbx_method, rdx); 3804 } 3805 3806 void TemplateTable::invokedynamic(int byte_no) { 3807 transition(vtos, vtos); 3808 assert(byte_no == f1_byte, "use this argument"); 3809 3810 const Register rbx_method = rbx; 3811 const Register rax_callsite = rax; 3812 3813 prepare_invoke(byte_no, rbx_method, rax_callsite); 3814 3815 // rax: CallSite object (from cpool->resolved_references[f1]) 3816 // rbx: MH.linkToCallSite method (from f2) 3817 3818 // Note: rax_callsite is already pushed by prepare_invoke 3819 3820 // %%% should make a type profile for any invokedynamic that takes a ref argument 3821 // profile this call 3822 __ profile_call(rbcp); 3823 __ profile_arguments_type(rdx, rbx_method, rbcp, false); 3824 3825 __ verify_oop(rax_callsite); 3826 3827 __ jump_from_interpreted(rbx_method, rdx); 3828 } 3829 3830 //----------------------------------------------------------------------------- 3831 // Allocation 3832 3833 void TemplateTable::_new() { 3834 transition(vtos, atos); 3835 __ get_unsigned_2_byte_index_at_bcp(rdx, 1); 3836 Label slow_case; 3837 Label slow_case_no_pop; 3838 Label done; 3839 Label initialize_header; 3840 Label initialize_object; // including clearing the fields 3841 Label allocate_shared; 3842 3843 __ get_cpool_and_tags(rcx, rax); 3844 3845 // Make sure the class we're about to instantiate has been resolved. 3846 // This is done before loading InstanceKlass to be consistent with the order 3847 // how Constant Pool is updated (see ConstantPool::klass_at_put) 3848 const int tags_offset = Array<u1>::base_offset_in_bytes(); 3849 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class); 3850 __ jcc(Assembler::notEqual, slow_case_no_pop); 3851 3852 // get InstanceKlass 3853 __ movptr(rcx, Address(rcx, rdx, Address::times_ptr, sizeof(ConstantPool))); 3854 __ push(rcx); // save the contexts of klass for initializing the header 3855 3856 // make sure klass is initialized & doesn't have finalizer 3857 // make sure klass is fully initialized 3858 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized); 3859 __ jcc(Assembler::notEqual, slow_case); 3860 3861 // get instance_size in InstanceKlass (scaled to a count of bytes) 3862 __ movl(rdx, Address(rcx, Klass::layout_helper_offset())); 3863 // test to see if it has a finalizer or is malformed in some way 3864 __ testl(rdx, Klass::_lh_instance_slow_path_bit); 3865 __ jcc(Assembler::notZero, slow_case); 3866 3867 // 3868 // Allocate the instance 3869 // 1) Try to allocate in the TLAB 3870 // 2) if fail and the object is large allocate in the shared Eden 3871 // 3) if the above fails (or is not applicable), go to a slow case 3872 // (creates a new TLAB, etc.) 3873 3874 const bool allow_shared_alloc = 3875 Universe::heap()->supports_inline_contig_alloc(); 3876 3877 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 3878 #ifndef _LP64 3879 if (UseTLAB || allow_shared_alloc) { 3880 __ get_thread(thread); 3881 } 3882 #endif // _LP64 3883 3884 if (UseTLAB) { 3885 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset()))); 3886 __ lea(rbx, Address(rax, rdx, Address::times_1)); 3887 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset()))); 3888 __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case); 3889 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx); 3890 if (ZeroTLAB) { 3891 // the fields have been already cleared 3892 __ jmp(initialize_header); 3893 } else { 3894 // initialize both the header and fields 3895 __ jmp(initialize_object); 3896 } 3897 } 3898 3899 // Allocation in the shared Eden, if allowed. 3900 // 3901 // rdx: instance size in bytes 3902 if (allow_shared_alloc) { 3903 __ bind(allocate_shared); 3904 3905 ExternalAddress heap_top((address)Universe::heap()->top_addr()); 3906 ExternalAddress heap_end((address)Universe::heap()->end_addr()); 3907 3908 Label retry; 3909 __ bind(retry); 3910 __ movptr(rax, heap_top); 3911 __ lea(rbx, Address(rax, rdx, Address::times_1)); 3912 __ cmpptr(rbx, heap_end); 3913 __ jcc(Assembler::above, slow_case); 3914 3915 // Compare rax, with the top addr, and if still equal, store the new 3916 // top addr in rbx, at the address of the top addr pointer. Sets ZF if was 3917 // equal, and clears it otherwise. Use lock prefix for atomicity on MPs. 3918 // 3919 // rax,: object begin 3920 // rbx,: object end 3921 // rdx: instance size in bytes 3922 __ locked_cmpxchgptr(rbx, heap_top); 3923 3924 // if someone beat us on the allocation, try again, otherwise continue 3925 __ jcc(Assembler::notEqual, retry); 3926 3927 __ incr_allocated_bytes(thread, rdx, 0); 3928 } 3929 3930 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) { 3931 // The object is initialized before the header. If the object size is 3932 // zero, go directly to the header initialization. 3933 __ bind(initialize_object); 3934 __ decrement(rdx, sizeof(oopDesc)); 3935 __ jcc(Assembler::zero, initialize_header); 3936 3937 // Initialize topmost object field, divide rdx by 8, check if odd and 3938 // test if zero. 3939 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) 3940 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd 3941 3942 // rdx must have been multiple of 8 3943 #ifdef ASSERT 3944 // make sure rdx was multiple of 8 3945 Label L; 3946 // Ignore partial flag stall after shrl() since it is debug VM 3947 __ jccb(Assembler::carryClear, L); 3948 __ stop("object size is not multiple of 2 - adjust this code"); 3949 __ bind(L); 3950 // rdx must be > 0, no extra check needed here 3951 #endif 3952 3953 // initialize remaining object fields: rdx was a multiple of 8 3954 { Label loop; 3955 __ bind(loop); 3956 __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx); 3957 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx)); 3958 __ decrement(rdx); 3959 __ jcc(Assembler::notZero, loop); 3960 } 3961 3962 // initialize object header only. 3963 __ bind(initialize_header); 3964 if (UseBiasedLocking) { 3965 __ pop(rcx); // get saved klass back in the register. 3966 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset())); 3967 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx); 3968 } else { 3969 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), 3970 (intptr_t)markOopDesc::prototype()); // header 3971 __ pop(rcx); // get saved klass back in the register. 3972 } 3973 #ifdef _LP64 3974 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code) 3975 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops 3976 #endif 3977 __ store_klass(rax, rcx); // klass 3978 3979 { 3980 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0); 3981 // Trigger dtrace event for fastpath 3982 __ push(atos); 3983 __ call_VM_leaf( 3984 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax); 3985 __ pop(atos); 3986 } 3987 3988 __ jmp(done); 3989 } 3990 3991 // slow case 3992 __ bind(slow_case); 3993 __ pop(rcx); // restore stack pointer to what it was when we came in. 3994 __ bind(slow_case_no_pop); 3995 3996 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax); 3997 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 3998 3999 __ get_constant_pool(rarg1); 4000 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4001 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2); 4002 __ verify_oop(rax); 4003 4004 // continue 4005 __ bind(done); 4006 } 4007 4008 void TemplateTable::newarray() { 4009 transition(itos, atos); 4010 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4011 __ load_unsigned_byte(rarg1, at_bcp(1)); 4012 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), 4013 rarg1, rax); 4014 } 4015 4016 void TemplateTable::anewarray() { 4017 transition(itos, atos); 4018 4019 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4020 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 4021 4022 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4023 __ get_constant_pool(rarg1); 4024 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), 4025 rarg1, rarg2, rax); 4026 } 4027 4028 void TemplateTable::arraylength() { 4029 transition(atos, itos); 4030 __ null_check(rax, arrayOopDesc::length_offset_in_bytes()); 4031 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes())); 4032 } 4033 4034 void TemplateTable::checkcast() { 4035 transition(atos, atos); 4036 Label done, is_null, ok_is_subtype, quicked, resolved; 4037 __ testptr(rax, rax); // object is in rax 4038 __ jcc(Assembler::zero, is_null); 4039 4040 // Get cpool & tags index 4041 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 4042 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 4043 // See if bytecode has already been quicked 4044 __ cmpb(Address(rdx, rbx, 4045 Address::times_1, 4046 Array<u1>::base_offset_in_bytes()), 4047 JVM_CONSTANT_Class); 4048 __ jcc(Assembler::equal, quicked); 4049 __ push(atos); // save receiver for result, and for GC 4050 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4051 4052 // vm_result_2 has metadata result 4053 #ifndef _LP64 4054 // borrow rdi from locals 4055 __ get_thread(rdi); 4056 __ get_vm_result_2(rax, rdi); 4057 __ restore_locals(); 4058 #else 4059 __ get_vm_result_2(rax, r15_thread); 4060 #endif 4061 4062 __ pop_ptr(rdx); // restore receiver 4063 __ jmpb(resolved); 4064 4065 // Get superklass in rax and subklass in rbx 4066 __ bind(quicked); 4067 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check 4068 __ movptr(rax, Address(rcx, rbx, 4069 Address::times_ptr, sizeof(ConstantPool))); 4070 4071 __ bind(resolved); 4072 __ load_klass(rbx, rdx); 4073 4074 // Generate subtype check. Blows rcx, rdi. Object in rdx. 4075 // Superklass in rax. Subklass in rbx. 4076 __ gen_subtype_check(rbx, ok_is_subtype); 4077 4078 // Come here on failure 4079 __ push_ptr(rdx); 4080 // object is at TOS 4081 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry)); 4082 4083 // Come here on success 4084 __ bind(ok_is_subtype); 4085 __ mov(rax, rdx); // Restore object in rdx 4086 4087 // Collect counts on whether this check-cast sees NULLs a lot or not. 4088 if (ProfileInterpreter) { 4089 __ jmp(done); 4090 __ bind(is_null); 4091 __ profile_null_seen(rcx); 4092 } else { 4093 __ bind(is_null); // same as 'done' 4094 } 4095 __ bind(done); 4096 } 4097 4098 void TemplateTable::instanceof() { 4099 transition(atos, itos); 4100 Label done, is_null, ok_is_subtype, quicked, resolved; 4101 __ testptr(rax, rax); 4102 __ jcc(Assembler::zero, is_null); 4103 4104 // Get cpool & tags index 4105 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 4106 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 4107 // See if bytecode has already been quicked 4108 __ cmpb(Address(rdx, rbx, 4109 Address::times_1, 4110 Array<u1>::base_offset_in_bytes()), 4111 JVM_CONSTANT_Class); 4112 __ jcc(Assembler::equal, quicked); 4113 4114 __ push(atos); // save receiver for result, and for GC 4115 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4116 // vm_result_2 has metadata result 4117 4118 #ifndef _LP64 4119 // borrow rdi from locals 4120 __ get_thread(rdi); 4121 __ get_vm_result_2(rax, rdi); 4122 __ restore_locals(); 4123 #else 4124 __ get_vm_result_2(rax, r15_thread); 4125 #endif 4126 4127 __ pop_ptr(rdx); // restore receiver 4128 __ verify_oop(rdx); 4129 __ load_klass(rdx, rdx); 4130 __ jmpb(resolved); 4131 4132 // Get superklass in rax and subklass in rdx 4133 __ bind(quicked); 4134 __ load_klass(rdx, rax); 4135 __ movptr(rax, Address(rcx, rbx, 4136 Address::times_ptr, sizeof(ConstantPool))); 4137 4138 __ bind(resolved); 4139 4140 // Generate subtype check. Blows rcx, rdi 4141 // Superklass in rax. Subklass in rdx. 4142 __ gen_subtype_check(rdx, ok_is_subtype); 4143 4144 // Come here on failure 4145 __ xorl(rax, rax); 4146 __ jmpb(done); 4147 // Come here on success 4148 __ bind(ok_is_subtype); 4149 __ movl(rax, 1); 4150 4151 // Collect counts on whether this test sees NULLs a lot or not. 4152 if (ProfileInterpreter) { 4153 __ jmp(done); 4154 __ bind(is_null); 4155 __ profile_null_seen(rcx); 4156 } else { 4157 __ bind(is_null); // same as 'done' 4158 } 4159 __ bind(done); 4160 // rax = 0: obj == NULL or obj is not an instanceof the specified klass 4161 // rax = 1: obj != NULL and obj is an instanceof the specified klass 4162 } 4163 4164 4165 //---------------------------------------------------------------------------------------------------- 4166 // Breakpoints 4167 void TemplateTable::_breakpoint() { 4168 // Note: We get here even if we are single stepping.. 4169 // jbug insists on setting breakpoints at every bytecode 4170 // even if we are in single step mode. 4171 4172 transition(vtos, vtos); 4173 4174 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4175 4176 // get the unpatched byte code 4177 __ get_method(rarg); 4178 __ call_VM(noreg, 4179 CAST_FROM_FN_PTR(address, 4180 InterpreterRuntime::get_original_bytecode_at), 4181 rarg, rbcp); 4182 __ mov(rbx, rax); // why? 4183 4184 // post the breakpoint event 4185 __ get_method(rarg); 4186 __ call_VM(noreg, 4187 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), 4188 rarg, rbcp); 4189 4190 // complete the execution of original bytecode 4191 __ dispatch_only_normal(vtos); 4192 } 4193 4194 //----------------------------------------------------------------------------- 4195 // Exceptions 4196 4197 void TemplateTable::athrow() { 4198 transition(atos, vtos); 4199 __ null_check(rax); 4200 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 4201 } 4202 4203 //----------------------------------------------------------------------------- 4204 // Synchronization 4205 // 4206 // Note: monitorenter & exit are symmetric routines; which is reflected 4207 // in the assembly code structure as well 4208 // 4209 // Stack layout: 4210 // 4211 // [expressions ] <--- rsp = expression stack top 4212 // .. 4213 // [expressions ] 4214 // [monitor entry] <--- monitor block top = expression stack bot 4215 // .. 4216 // [monitor entry] 4217 // [frame data ] <--- monitor block bot 4218 // ... 4219 // [saved rbp ] <--- rbp 4220 void TemplateTable::monitorenter() { 4221 transition(atos, vtos); 4222 4223 // check for NULL object 4224 __ null_check(rax); 4225 4226 const Address monitor_block_top( 4227 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4228 const Address monitor_block_bot( 4229 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 4230 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4231 4232 Label allocated; 4233 4234 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 4235 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx); 4236 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4237 4238 // initialize entry pointer 4239 __ xorl(rmon, rmon); // points to free slot or NULL 4240 4241 // find a free slot in the monitor block (result in rmon) 4242 { 4243 Label entry, loop, exit; 4244 __ movptr(rtop, monitor_block_top); // points to current entry, 4245 // starting with top-most entry 4246 __ lea(rbot, monitor_block_bot); // points to word before bottom 4247 // of monitor block 4248 __ jmpb(entry); 4249 4250 __ bind(loop); 4251 // check if current entry is used 4252 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD); 4253 // if not used then remember entry in rmon 4254 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr 4255 // check if current entry is for same object 4256 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes())); 4257 // if same object then stop searching 4258 __ jccb(Assembler::equal, exit); 4259 // otherwise advance to next entry 4260 __ addptr(rtop, entry_size); 4261 __ bind(entry); 4262 // check if bottom reached 4263 __ cmpptr(rtop, rbot); 4264 // if not at bottom then check this entry 4265 __ jcc(Assembler::notEqual, loop); 4266 __ bind(exit); 4267 } 4268 4269 __ testptr(rmon, rmon); // check if a slot has been found 4270 __ jcc(Assembler::notZero, allocated); // if found, continue with that one 4271 4272 // allocate one if there's no free slot 4273 { 4274 Label entry, loop; 4275 // 1. compute new pointers // rsp: old expression stack top 4276 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom 4277 __ subptr(rsp, entry_size); // move expression stack top 4278 __ subptr(rmon, entry_size); // move expression stack bottom 4279 __ mov(rtop, rsp); // set start value for copy loop 4280 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom 4281 __ jmp(entry); 4282 // 2. move expression stack contents 4283 __ bind(loop); 4284 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack 4285 // word from old location 4286 __ movptr(Address(rtop, 0), rbot); // and store it at new location 4287 __ addptr(rtop, wordSize); // advance to next word 4288 __ bind(entry); 4289 __ cmpptr(rtop, rmon); // check if bottom reached 4290 __ jcc(Assembler::notEqual, loop); // if not at bottom then 4291 // copy next word 4292 } 4293 4294 // call run-time routine 4295 // rmon: points to monitor entry 4296 __ bind(allocated); 4297 4298 // Increment bcp to point to the next bytecode, so exception 4299 // handling for async. exceptions work correctly. 4300 // The object has already been poped from the stack, so the 4301 // expression stack looks correct. 4302 __ increment(rbcp); 4303 4304 // store object 4305 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax); 4306 __ lock_object(rmon); 4307 4308 // check to make sure this monitor doesn't cause stack overflow after locking 4309 __ save_bcp(); // in case of exception 4310 __ generate_stack_overflow_check(0); 4311 4312 // The bcp has already been incremented. Just need to dispatch to 4313 // next instruction. 4314 __ dispatch_next(vtos); 4315 } 4316 4317 void TemplateTable::monitorexit() { 4318 transition(atos, vtos); 4319 4320 // check for NULL object 4321 __ null_check(rax); 4322 4323 const Address monitor_block_top( 4324 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4325 const Address monitor_block_bot( 4326 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 4327 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4328 4329 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4330 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx); 4331 4332 Label found; 4333 4334 // find matching slot 4335 { 4336 Label entry, loop; 4337 __ movptr(rtop, monitor_block_top); // points to current entry, 4338 // starting with top-most entry 4339 __ lea(rbot, monitor_block_bot); // points to word before bottom 4340 // of monitor block 4341 __ jmpb(entry); 4342 4343 __ bind(loop); 4344 // check if current entry is for same object 4345 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes())); 4346 // if same object then stop searching 4347 __ jcc(Assembler::equal, found); 4348 // otherwise advance to next entry 4349 __ addptr(rtop, entry_size); 4350 __ bind(entry); 4351 // check if bottom reached 4352 __ cmpptr(rtop, rbot); 4353 // if not at bottom then check this entry 4354 __ jcc(Assembler::notEqual, loop); 4355 } 4356 4357 // error handling. Unlocking was not block-structured 4358 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 4359 InterpreterRuntime::throw_illegal_monitor_state_exception)); 4360 __ should_not_reach_here(); 4361 4362 // call run-time routine 4363 __ bind(found); 4364 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps) 4365 __ unlock_object(rtop); 4366 __ pop_ptr(rax); // discard object 4367 } 4368 4369 // Wide instructions 4370 void TemplateTable::wide() { 4371 transition(vtos, vtos); 4372 __ load_unsigned_byte(rbx, at_bcp(1)); 4373 ExternalAddress wtable((address)Interpreter::_wentry_point); 4374 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr))); 4375 // Note: the rbcp increment step is part of the individual wide bytecode implementations 4376 } 4377 4378 // Multi arrays 4379 void TemplateTable::multianewarray() { 4380 transition(vtos, atos); 4381 4382 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax); 4383 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions 4384 // last dim is on top of stack; we want address of first one: 4385 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize 4386 // the latter wordSize to point to the beginning of the array. 4387 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize)); 4388 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg); 4389 __ load_unsigned_byte(rbx, at_bcp(3)); 4390 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts 4391 }