1 /* 2 * Copyright (c) 1997, 2017, 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, true); 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, true); 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 __ set_method_data_pointer_for_bcp(); 2214 __ jmp(dispatch); 2215 } 2216 2217 if (UseOnStackReplacement) { 2218 // invocation counter overflow 2219 __ bind(backedge_counter_overflow); 2220 __ negptr(rdx); 2221 __ addptr(rdx, rbcp); // branch bcp 2222 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp) 2223 __ call_VM(noreg, 2224 CAST_FROM_FN_PTR(address, 2225 InterpreterRuntime::frequency_counter_overflow), 2226 rdx); 2227 2228 // rax: osr nmethod (osr ok) or NULL (osr not possible) 2229 // rdx: scratch 2230 // r14: locals pointer 2231 // r13: bcp 2232 __ testptr(rax, rax); // test result 2233 __ jcc(Assembler::zero, dispatch); // no osr if null 2234 // nmethod may have been invalidated (VM may block upon call_VM return) 2235 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use); 2236 __ jcc(Assembler::notEqual, dispatch); 2237 2238 // We have the address of an on stack replacement routine in rax. 2239 // In preparation of invoking it, first we must migrate the locals 2240 // and monitors from off the interpreter frame on the stack. 2241 // Ensure to save the osr nmethod over the migration call, 2242 // it will be preserved in rbx. 2243 __ mov(rbx, rax); 2244 2245 NOT_LP64(__ get_thread(rcx)); 2246 2247 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin)); 2248 2249 // rax is OSR buffer, move it to expected parameter location 2250 LP64_ONLY(__ mov(j_rarg0, rax)); 2251 NOT_LP64(__ mov(rcx, rax)); 2252 // We use j_rarg definitions here so that registers don't conflict as parameter 2253 // registers change across platforms as we are in the midst of a calling 2254 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters. 2255 2256 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi); 2257 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx); 2258 2259 // pop the interpreter frame 2260 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 2261 __ leave(); // remove frame anchor 2262 __ pop(retaddr); // get return address 2263 __ mov(rsp, sender_sp); // set sp to sender sp 2264 // Ensure compiled code always sees stack at proper alignment 2265 __ andptr(rsp, -(StackAlignmentInBytes)); 2266 2267 // unlike x86 we need no specialized return from compiled code 2268 // to the interpreter or the call stub. 2269 2270 // push the return address 2271 __ push(retaddr); 2272 2273 // and begin the OSR nmethod 2274 __ jmp(Address(rbx, nmethod::osr_entry_point_offset())); 2275 } 2276 } 2277 } 2278 2279 void TemplateTable::if_0cmp(Condition cc) { 2280 transition(itos, vtos); 2281 // assume branch is more often taken than not (loops use backward branches) 2282 Label not_taken; 2283 __ testl(rax, rax); 2284 __ jcc(j_not(cc), not_taken); 2285 branch(false, false); 2286 __ bind(not_taken); 2287 __ profile_not_taken_branch(rax); 2288 } 2289 2290 void TemplateTable::if_icmp(Condition cc) { 2291 transition(itos, vtos); 2292 // assume branch is more often taken than not (loops use backward branches) 2293 Label not_taken; 2294 __ pop_i(rdx); 2295 __ cmpl(rdx, rax); 2296 __ jcc(j_not(cc), not_taken); 2297 branch(false, false); 2298 __ bind(not_taken); 2299 __ profile_not_taken_branch(rax); 2300 } 2301 2302 void TemplateTable::if_nullcmp(Condition cc) { 2303 transition(atos, vtos); 2304 // assume branch is more often taken than not (loops use backward branches) 2305 Label not_taken; 2306 __ testptr(rax, rax); 2307 __ jcc(j_not(cc), not_taken); 2308 branch(false, false); 2309 __ bind(not_taken); 2310 __ profile_not_taken_branch(rax); 2311 } 2312 2313 void TemplateTable::if_acmp(Condition cc) { 2314 transition(atos, vtos); 2315 // assume branch is more often taken than not (loops use backward branches) 2316 Label not_taken; 2317 __ pop_ptr(rdx); 2318 __ cmpoop(rdx, rax); 2319 __ jcc(j_not(cc), not_taken); 2320 branch(false, false); 2321 __ bind(not_taken); 2322 __ profile_not_taken_branch(rax); 2323 } 2324 2325 void TemplateTable::ret() { 2326 transition(vtos, vtos); 2327 locals_index(rbx); 2328 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp 2329 NOT_LP64(__ movptr(rbx, iaddress(rbx))); 2330 __ profile_ret(rbx, rcx); 2331 __ get_method(rax); 2332 __ movptr(rbcp, Address(rax, Method::const_offset())); 2333 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, 2334 ConstMethod::codes_offset())); 2335 __ dispatch_next(vtos, 0, true); 2336 } 2337 2338 void TemplateTable::wide_ret() { 2339 transition(vtos, vtos); 2340 locals_index_wide(rbx); 2341 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp 2342 __ profile_ret(rbx, rcx); 2343 __ get_method(rax); 2344 __ movptr(rbcp, Address(rax, Method::const_offset())); 2345 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset())); 2346 __ dispatch_next(vtos, 0, true); 2347 } 2348 2349 void TemplateTable::tableswitch() { 2350 Label default_case, continue_execution; 2351 transition(itos, vtos); 2352 2353 // align r13/rsi 2354 __ lea(rbx, at_bcp(BytesPerInt)); 2355 __ andptr(rbx, -BytesPerInt); 2356 // load lo & hi 2357 __ movl(rcx, Address(rbx, BytesPerInt)); 2358 __ movl(rdx, Address(rbx, 2 * BytesPerInt)); 2359 __ bswapl(rcx); 2360 __ bswapl(rdx); 2361 // check against lo & hi 2362 __ cmpl(rax, rcx); 2363 __ jcc(Assembler::less, default_case); 2364 __ cmpl(rax, rdx); 2365 __ jcc(Assembler::greater, default_case); 2366 // lookup dispatch offset 2367 __ subl(rax, rcx); 2368 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt)); 2369 __ profile_switch_case(rax, rbx, rcx); 2370 // continue execution 2371 __ bind(continue_execution); 2372 __ bswapl(rdx); 2373 LP64_ONLY(__ movl2ptr(rdx, rdx)); 2374 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1)); 2375 __ addptr(rbcp, rdx); 2376 __ dispatch_only(vtos, true); 2377 // handle default 2378 __ bind(default_case); 2379 __ profile_switch_default(rax); 2380 __ movl(rdx, Address(rbx, 0)); 2381 __ jmp(continue_execution); 2382 } 2383 2384 void TemplateTable::lookupswitch() { 2385 transition(itos, itos); 2386 __ stop("lookupswitch bytecode should have been rewritten"); 2387 } 2388 2389 void TemplateTable::fast_linearswitch() { 2390 transition(itos, vtos); 2391 Label loop_entry, loop, found, continue_execution; 2392 // bswap rax so we can avoid bswapping the table entries 2393 __ bswapl(rax); 2394 // align r13 2395 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of 2396 // this instruction (change offsets 2397 // below) 2398 __ andptr(rbx, -BytesPerInt); 2399 // set counter 2400 __ movl(rcx, Address(rbx, BytesPerInt)); 2401 __ bswapl(rcx); 2402 __ jmpb(loop_entry); 2403 // table search 2404 __ bind(loop); 2405 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt)); 2406 __ jcc(Assembler::equal, found); 2407 __ bind(loop_entry); 2408 __ decrementl(rcx); 2409 __ jcc(Assembler::greaterEqual, loop); 2410 // default case 2411 __ profile_switch_default(rax); 2412 __ movl(rdx, Address(rbx, 0)); 2413 __ jmp(continue_execution); 2414 // entry found -> get offset 2415 __ bind(found); 2416 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt)); 2417 __ profile_switch_case(rcx, rax, rbx); 2418 // continue execution 2419 __ bind(continue_execution); 2420 __ bswapl(rdx); 2421 __ movl2ptr(rdx, rdx); 2422 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1)); 2423 __ addptr(rbcp, rdx); 2424 __ dispatch_only(vtos, true); 2425 } 2426 2427 void TemplateTable::fast_binaryswitch() { 2428 transition(itos, vtos); 2429 // Implementation using the following core algorithm: 2430 // 2431 // int binary_search(int key, LookupswitchPair* array, int n) { 2432 // // Binary search according to "Methodik des Programmierens" by 2433 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985. 2434 // int i = 0; 2435 // int j = n; 2436 // while (i+1 < j) { 2437 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q) 2438 // // with Q: for all i: 0 <= i < n: key < a[i] 2439 // // where a stands for the array and assuming that the (inexisting) 2440 // // element a[n] is infinitely big. 2441 // int h = (i + j) >> 1; 2442 // // i < h < j 2443 // if (key < array[h].fast_match()) { 2444 // j = h; 2445 // } else { 2446 // i = h; 2447 // } 2448 // } 2449 // // R: a[i] <= key < a[i+1] or Q 2450 // // (i.e., if key is within array, i is the correct index) 2451 // return i; 2452 // } 2453 2454 // Register allocation 2455 const Register key = rax; // already set (tosca) 2456 const Register array = rbx; 2457 const Register i = rcx; 2458 const Register j = rdx; 2459 const Register h = rdi; 2460 const Register temp = rsi; 2461 2462 // Find array start 2463 NOT_LP64(__ save_bcp()); 2464 2465 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to 2466 // get rid of this 2467 // instruction (change 2468 // offsets below) 2469 __ andptr(array, -BytesPerInt); 2470 2471 // Initialize i & j 2472 __ xorl(i, i); // i = 0; 2473 __ movl(j, Address(array, -BytesPerInt)); // j = length(array); 2474 2475 // Convert j into native byteordering 2476 __ bswapl(j); 2477 2478 // And start 2479 Label entry; 2480 __ jmp(entry); 2481 2482 // binary search loop 2483 { 2484 Label loop; 2485 __ bind(loop); 2486 // int h = (i + j) >> 1; 2487 __ leal(h, Address(i, j, Address::times_1)); // h = i + j; 2488 __ sarl(h, 1); // h = (i + j) >> 1; 2489 // if (key < array[h].fast_match()) { 2490 // j = h; 2491 // } else { 2492 // i = h; 2493 // } 2494 // Convert array[h].match to native byte-ordering before compare 2495 __ movl(temp, Address(array, h, Address::times_8)); 2496 __ bswapl(temp); 2497 __ cmpl(key, temp); 2498 // j = h if (key < array[h].fast_match()) 2499 __ cmov32(Assembler::less, j, h); 2500 // i = h if (key >= array[h].fast_match()) 2501 __ cmov32(Assembler::greaterEqual, i, h); 2502 // while (i+1 < j) 2503 __ bind(entry); 2504 __ leal(h, Address(i, 1)); // i+1 2505 __ cmpl(h, j); // i+1 < j 2506 __ jcc(Assembler::less, loop); 2507 } 2508 2509 // end of binary search, result index is i (must check again!) 2510 Label default_case; 2511 // Convert array[i].match to native byte-ordering before compare 2512 __ movl(temp, Address(array, i, Address::times_8)); 2513 __ bswapl(temp); 2514 __ cmpl(key, temp); 2515 __ jcc(Assembler::notEqual, default_case); 2516 2517 // entry found -> j = offset 2518 __ movl(j , Address(array, i, Address::times_8, BytesPerInt)); 2519 __ profile_switch_case(i, key, array); 2520 __ bswapl(j); 2521 LP64_ONLY(__ movslq(j, j)); 2522 2523 NOT_LP64(__ restore_bcp()); 2524 NOT_LP64(__ restore_locals()); // restore rdi 2525 2526 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1)); 2527 __ addptr(rbcp, j); 2528 __ dispatch_only(vtos, true); 2529 2530 // default case -> j = default offset 2531 __ bind(default_case); 2532 __ profile_switch_default(i); 2533 __ movl(j, Address(array, -2 * BytesPerInt)); 2534 __ bswapl(j); 2535 LP64_ONLY(__ movslq(j, j)); 2536 2537 NOT_LP64(__ restore_bcp()); 2538 NOT_LP64(__ restore_locals()); 2539 2540 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1)); 2541 __ addptr(rbcp, j); 2542 __ dispatch_only(vtos, true); 2543 } 2544 2545 void TemplateTable::_return(TosState state) { 2546 transition(state, state); 2547 2548 assert(_desc->calls_vm(), 2549 "inconsistent calls_vm information"); // call in remove_activation 2550 2551 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) { 2552 assert(state == vtos, "only valid state"); 2553 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax); 2554 __ movptr(robj, aaddress(0)); 2555 __ load_klass(rdi, robj); 2556 __ movl(rdi, Address(rdi, Klass::access_flags_offset())); 2557 __ testl(rdi, JVM_ACC_HAS_FINALIZER); 2558 Label skip_register_finalizer; 2559 __ jcc(Assembler::zero, skip_register_finalizer); 2560 2561 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj); 2562 2563 __ bind(skip_register_finalizer); 2564 } 2565 2566 #ifdef _LP64 2567 if (SafepointMechanism::uses_thread_local_poll() && _desc->bytecode() != Bytecodes::_return_register_finalizer) { 2568 Label no_safepoint; 2569 NOT_PRODUCT(__ block_comment("Thread-local Safepoint poll")); 2570 __ testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 2571 __ jcc(Assembler::zero, no_safepoint); 2572 __ push(state); 2573 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 2574 InterpreterRuntime::at_safepoint)); 2575 __ pop(state); 2576 __ bind(no_safepoint); 2577 } 2578 #endif 2579 2580 // Narrow result if state is itos but result type is smaller. 2581 // Need to narrow in the return bytecode rather than in generate_return_entry 2582 // since compiled code callers expect the result to already be narrowed. 2583 if (state == itos) { 2584 __ narrow(rax); 2585 } 2586 __ remove_activation(state, rbcp); 2587 2588 __ jmp(rbcp); 2589 } 2590 2591 // ---------------------------------------------------------------------------- 2592 // Volatile variables demand their effects be made known to all CPU's 2593 // in order. Store buffers on most chips allow reads & writes to 2594 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode 2595 // without some kind of memory barrier (i.e., it's not sufficient that 2596 // the interpreter does not reorder volatile references, the hardware 2597 // also must not reorder them). 2598 // 2599 // According to the new Java Memory Model (JMM): 2600 // (1) All volatiles are serialized wrt to each other. ALSO reads & 2601 // writes act as aquire & release, so: 2602 // (2) A read cannot let unrelated NON-volatile memory refs that 2603 // happen after the read float up to before the read. It's OK for 2604 // non-volatile memory refs that happen before the volatile read to 2605 // float down below it. 2606 // (3) Similar a volatile write cannot let unrelated NON-volatile 2607 // memory refs that happen BEFORE the write float down to after the 2608 // write. It's OK for non-volatile memory refs that happen after the 2609 // volatile write to float up before it. 2610 // 2611 // We only put in barriers around volatile refs (they are expensive), 2612 // not _between_ memory refs (that would require us to track the 2613 // flavor of the previous memory refs). Requirements (2) and (3) 2614 // require some barriers before volatile stores and after volatile 2615 // loads. These nearly cover requirement (1) but miss the 2616 // volatile-store-volatile-load case. This final case is placed after 2617 // volatile-stores although it could just as well go before 2618 // volatile-loads. 2619 2620 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) { 2621 // Helper function to insert a is-volatile test and memory barrier 2622 if(!os::is_MP()) return; // Not needed on single CPU 2623 __ membar(order_constraint); 2624 } 2625 2626 void TemplateTable::resolve_cache_and_index(int byte_no, 2627 Register Rcache, 2628 Register index, 2629 size_t index_size) { 2630 const Register temp = rbx; 2631 assert_different_registers(Rcache, index, temp); 2632 2633 Label resolved; 2634 2635 Bytecodes::Code code = bytecode(); 2636 switch (code) { 2637 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break; 2638 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break; 2639 default: break; 2640 } 2641 2642 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 2643 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size); 2644 __ cmpl(temp, code); // have we resolved this bytecode? 2645 __ jcc(Assembler::equal, resolved); 2646 2647 // resolve first time through 2648 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache); 2649 __ movl(temp, code); 2650 __ call_VM(noreg, entry, temp); 2651 // Update registers with resolved info 2652 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); 2653 __ bind(resolved); 2654 } 2655 2656 // The cache and index registers must be set before call 2657 void TemplateTable::load_field_cp_cache_entry(Register obj, 2658 Register cache, 2659 Register index, 2660 Register off, 2661 Register flags, 2662 bool is_static = false) { 2663 assert_different_registers(cache, index, flags, off); 2664 2665 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2666 // Field offset 2667 __ movptr(off, Address(cache, index, Address::times_ptr, 2668 in_bytes(cp_base_offset + 2669 ConstantPoolCacheEntry::f2_offset()))); 2670 // Flags 2671 __ movl(flags, Address(cache, index, Address::times_ptr, 2672 in_bytes(cp_base_offset + 2673 ConstantPoolCacheEntry::flags_offset()))); 2674 2675 // klass overwrite register 2676 if (is_static) { 2677 __ movptr(obj, Address(cache, index, Address::times_ptr, 2678 in_bytes(cp_base_offset + 2679 ConstantPoolCacheEntry::f1_offset()))); 2680 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 2681 __ movptr(obj, Address(obj, mirror_offset)); 2682 __ resolve_oop_handle(obj); 2683 } 2684 } 2685 2686 void TemplateTable::load_invoke_cp_cache_entry(int byte_no, 2687 Register method, 2688 Register itable_index, 2689 Register flags, 2690 bool is_invokevirtual, 2691 bool is_invokevfinal, /*unused*/ 2692 bool is_invokedynamic) { 2693 // setup registers 2694 const Register cache = rcx; 2695 const Register index = rdx; 2696 assert_different_registers(method, flags); 2697 assert_different_registers(method, cache, index); 2698 assert_different_registers(itable_index, flags); 2699 assert_different_registers(itable_index, cache, index); 2700 // determine constant pool cache field offsets 2701 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant"); 2702 const int method_offset = in_bytes( 2703 ConstantPoolCache::base_offset() + 2704 ((byte_no == f2_byte) 2705 ? ConstantPoolCacheEntry::f2_offset() 2706 : ConstantPoolCacheEntry::f1_offset())); 2707 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + 2708 ConstantPoolCacheEntry::flags_offset()); 2709 // access constant pool cache fields 2710 const int index_offset = in_bytes(ConstantPoolCache::base_offset() + 2711 ConstantPoolCacheEntry::f2_offset()); 2712 2713 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2)); 2714 resolve_cache_and_index(byte_no, cache, index, index_size); 2715 __ movptr(method, Address(cache, index, Address::times_ptr, method_offset)); 2716 2717 if (itable_index != noreg) { 2718 // pick up itable or appendix index from f2 also: 2719 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset)); 2720 } 2721 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset)); 2722 } 2723 2724 // The registers cache and index expected to be set before call. 2725 // Correct values of the cache and index registers are preserved. 2726 void TemplateTable::jvmti_post_field_access(Register cache, 2727 Register index, 2728 bool is_static, 2729 bool has_tos) { 2730 if (JvmtiExport::can_post_field_access()) { 2731 // Check to see if a field access watch has been set before we take 2732 // the time to call into the VM. 2733 Label L1; 2734 assert_different_registers(cache, index, rax); 2735 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 2736 __ testl(rax,rax); 2737 __ jcc(Assembler::zero, L1); 2738 2739 // cache entry pointer 2740 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 2741 __ shll(index, LogBytesPerWord); 2742 __ addptr(cache, index); 2743 if (is_static) { 2744 __ xorptr(rax, rax); // NULL object reference 2745 } else { 2746 __ pop(atos); // Get the object 2747 __ verify_oop(rax); 2748 __ push(atos); // Restore stack state 2749 } 2750 // rax,: object pointer or NULL 2751 // cache: cache entry pointer 2752 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), 2753 rax, cache); 2754 __ get_cache_and_index_at_bcp(cache, index, 1); 2755 __ bind(L1); 2756 } 2757 } 2758 2759 void TemplateTable::pop_and_check_object(Register r) { 2760 __ pop_ptr(r); 2761 __ null_check(r); // for field access must check obj. 2762 __ verify_oop(r); 2763 } 2764 2765 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 2766 transition(vtos, vtos); 2767 2768 const Register cache = rcx; 2769 const Register index = rdx; 2770 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 2771 const Register off = rbx; 2772 const Register flags = rax; 2773 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them 2774 2775 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 2776 jvmti_post_field_access(cache, index, is_static, false); 2777 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 2778 2779 if (!is_static) pop_and_check_object(obj); 2780 2781 const Address field(obj, off, Address::times_1, 0*wordSize); 2782 NOT_LP64(const Address hi(obj, off, Address::times_1, 1*wordSize)); 2783 2784 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notDouble; 2785 2786 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 2787 // Make sure we don't need to mask edx after the above shift 2788 assert(btos == 0, "change code, btos != 0"); 2789 2790 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 2791 2792 __ jcc(Assembler::notZero, notByte); 2793 // btos 2794 __ load_signed_byte(rax, field); 2795 __ push(btos); 2796 // Rewrite bytecode to be faster 2797 if (!is_static && rc == may_rewrite) { 2798 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 2799 } 2800 __ jmp(Done); 2801 2802 __ bind(notByte); 2803 __ cmpl(flags, ztos); 2804 __ jcc(Assembler::notEqual, notBool); 2805 2806 // ztos (same code as btos) 2807 __ load_signed_byte(rax, field); 2808 __ push(ztos); 2809 // Rewrite bytecode to be faster 2810 if (!is_static && rc == may_rewrite) { 2811 // use btos rewriting, no truncating to t/f bit is needed for getfield. 2812 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 2813 } 2814 __ jmp(Done); 2815 2816 __ bind(notBool); 2817 __ cmpl(flags, atos); 2818 __ jcc(Assembler::notEqual, notObj); 2819 // atos 2820 __ load_heap_oop(rax, field); 2821 __ push(atos); 2822 if (!is_static && rc == may_rewrite) { 2823 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx); 2824 } 2825 __ jmp(Done); 2826 2827 __ bind(notObj); 2828 __ cmpl(flags, itos); 2829 __ jcc(Assembler::notEqual, notInt); 2830 // itos 2831 __ movl(rax, field); 2832 __ push(itos); 2833 // Rewrite bytecode to be faster 2834 if (!is_static && rc == may_rewrite) { 2835 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx); 2836 } 2837 __ jmp(Done); 2838 2839 __ bind(notInt); 2840 __ cmpl(flags, ctos); 2841 __ jcc(Assembler::notEqual, notChar); 2842 // ctos 2843 __ load_unsigned_short(rax, field); 2844 __ push(ctos); 2845 // Rewrite bytecode to be faster 2846 if (!is_static && rc == may_rewrite) { 2847 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx); 2848 } 2849 __ jmp(Done); 2850 2851 __ bind(notChar); 2852 __ cmpl(flags, stos); 2853 __ jcc(Assembler::notEqual, notShort); 2854 // stos 2855 __ load_signed_short(rax, field); 2856 __ push(stos); 2857 // Rewrite bytecode to be faster 2858 if (!is_static && rc == may_rewrite) { 2859 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx); 2860 } 2861 __ jmp(Done); 2862 2863 __ bind(notShort); 2864 __ cmpl(flags, ltos); 2865 __ jcc(Assembler::notEqual, notLong); 2866 // ltos 2867 2868 #ifndef _LP64 2869 // Generate code as if volatile. There just aren't enough registers to 2870 // save that information and this code is faster than the test. 2871 __ fild_d(field); // Must load atomically 2872 __ subptr(rsp,2*wordSize); // Make space for store 2873 __ fistp_d(Address(rsp,0)); 2874 __ pop(rax); 2875 __ pop(rdx); 2876 #else 2877 __ movq(rax, field); 2878 #endif 2879 2880 __ push(ltos); 2881 // Rewrite bytecode to be faster 2882 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx)); 2883 __ jmp(Done); 2884 2885 __ bind(notLong); 2886 __ cmpl(flags, ftos); 2887 __ jcc(Assembler::notEqual, notFloat); 2888 // ftos 2889 2890 __ load_float(field); 2891 __ push(ftos); 2892 // Rewrite bytecode to be faster 2893 if (!is_static && rc == may_rewrite) { 2894 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx); 2895 } 2896 __ jmp(Done); 2897 2898 __ bind(notFloat); 2899 #ifdef ASSERT 2900 __ cmpl(flags, dtos); 2901 __ jcc(Assembler::notEqual, notDouble); 2902 #endif 2903 // dtos 2904 __ load_double(field); 2905 __ push(dtos); 2906 // Rewrite bytecode to be faster 2907 if (!is_static && rc == may_rewrite) { 2908 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx); 2909 } 2910 #ifdef ASSERT 2911 __ jmp(Done); 2912 2913 2914 __ bind(notDouble); 2915 __ stop("Bad state"); 2916 #endif 2917 2918 __ bind(Done); 2919 // [jk] not needed currently 2920 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad | 2921 // Assembler::LoadStore)); 2922 } 2923 2924 void TemplateTable::getfield(int byte_no) { 2925 getfield_or_static(byte_no, false); 2926 } 2927 2928 void TemplateTable::nofast_getfield(int byte_no) { 2929 getfield_or_static(byte_no, false, may_not_rewrite); 2930 } 2931 2932 void TemplateTable::getstatic(int byte_no) { 2933 getfield_or_static(byte_no, true); 2934 } 2935 2936 2937 // The registers cache and index expected to be set before call. 2938 // The function may destroy various registers, just not the cache and index registers. 2939 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) { 2940 2941 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax); 2942 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 2943 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 2944 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx); 2945 2946 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2947 2948 if (JvmtiExport::can_post_field_modification()) { 2949 // Check to see if a field modification watch has been set before 2950 // we take the time to call into the VM. 2951 Label L1; 2952 assert_different_registers(cache, index, rax); 2953 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 2954 __ testl(rax, rax); 2955 __ jcc(Assembler::zero, L1); 2956 2957 __ get_cache_and_index_at_bcp(robj, RDX, 1); 2958 2959 2960 if (is_static) { 2961 // Life is simple. Null out the object pointer. 2962 __ xorl(RBX, RBX); 2963 2964 } else { 2965 // Life is harder. The stack holds the value on top, followed by 2966 // the object. We don't know the size of the value, though; it 2967 // could be one or two words depending on its type. As a result, 2968 // we must find the type to determine where the object is. 2969 #ifndef _LP64 2970 Label two_word, valsize_known; 2971 #endif 2972 __ movl(RCX, Address(robj, RDX, 2973 Address::times_ptr, 2974 in_bytes(cp_base_offset + 2975 ConstantPoolCacheEntry::flags_offset()))); 2976 NOT_LP64(__ mov(rbx, rsp)); 2977 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift); 2978 2979 // Make sure we don't need to mask rcx after the above shift 2980 ConstantPoolCacheEntry::verify_tos_state_shift(); 2981 #ifdef _LP64 2982 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue 2983 __ cmpl(c_rarg3, ltos); 2984 __ cmovptr(Assembler::equal, 2985 c_rarg1, at_tos_p2()); // ltos (two word jvalue) 2986 __ cmpl(c_rarg3, dtos); 2987 __ cmovptr(Assembler::equal, 2988 c_rarg1, at_tos_p2()); // dtos (two word jvalue) 2989 #else 2990 __ cmpl(rcx, ltos); 2991 __ jccb(Assembler::equal, two_word); 2992 __ cmpl(rcx, dtos); 2993 __ jccb(Assembler::equal, two_word); 2994 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos) 2995 __ jmpb(valsize_known); 2996 2997 __ bind(two_word); 2998 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue 2999 3000 __ bind(valsize_known); 3001 // setup object pointer 3002 __ movptr(rbx, Address(rbx, 0)); 3003 #endif 3004 } 3005 // cache entry pointer 3006 __ addptr(robj, in_bytes(cp_base_offset)); 3007 __ shll(RDX, LogBytesPerWord); 3008 __ addptr(robj, RDX); 3009 // object (tos) 3010 __ mov(RCX, rsp); 3011 // c_rarg1: object pointer set up above (NULL if static) 3012 // c_rarg2: cache entry pointer 3013 // c_rarg3: jvalue object on the stack 3014 __ call_VM(noreg, 3015 CAST_FROM_FN_PTR(address, 3016 InterpreterRuntime::post_field_modification), 3017 RBX, robj, RCX); 3018 __ get_cache_and_index_at_bcp(cache, index, 1); 3019 __ bind(L1); 3020 } 3021 } 3022 3023 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 3024 transition(vtos, vtos); 3025 3026 const Register cache = rcx; 3027 const Register index = rdx; 3028 const Register obj = rcx; 3029 const Register off = rbx; 3030 const Register flags = rax; 3031 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3032 3033 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 3034 jvmti_post_field_mod(cache, index, is_static); 3035 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 3036 3037 // [jk] not needed currently 3038 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 3039 // Assembler::StoreStore)); 3040 3041 Label notVolatile, Done; 3042 __ movl(rdx, flags); 3043 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3044 __ andl(rdx, 0x1); 3045 3046 // field addresses 3047 const Address field(obj, off, Address::times_1, 0*wordSize); 3048 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);) 3049 3050 Label notByte, notBool, notInt, notShort, notChar, 3051 notLong, notFloat, notObj, notDouble; 3052 3053 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 3054 3055 assert(btos == 0, "change code, btos != 0"); 3056 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 3057 __ jcc(Assembler::notZero, notByte); 3058 3059 // btos 3060 { 3061 __ pop(btos); 3062 if (!is_static) pop_and_check_object(obj); 3063 __ movb(field, rax); 3064 if (!is_static && rc == may_rewrite) { 3065 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no); 3066 } 3067 __ jmp(Done); 3068 } 3069 3070 __ bind(notByte); 3071 __ cmpl(flags, ztos); 3072 __ jcc(Assembler::notEqual, notBool); 3073 3074 // ztos 3075 { 3076 __ pop(ztos); 3077 if (!is_static) pop_and_check_object(obj); 3078 __ andl(rax, 0x1); 3079 __ movb(field, rax); 3080 if (!is_static && rc == may_rewrite) { 3081 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no); 3082 } 3083 __ jmp(Done); 3084 } 3085 3086 __ bind(notBool); 3087 __ cmpl(flags, atos); 3088 __ jcc(Assembler::notEqual, notObj); 3089 3090 // atos 3091 { 3092 __ pop(atos); 3093 if (!is_static) pop_and_check_object(obj); 3094 // Store into the field 3095 do_oop_store(_masm, field, rax, _bs->kind(), false); 3096 if (!is_static && rc == may_rewrite) { 3097 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no); 3098 } 3099 __ jmp(Done); 3100 } 3101 3102 __ bind(notObj); 3103 __ cmpl(flags, itos); 3104 __ jcc(Assembler::notEqual, notInt); 3105 3106 // itos 3107 { 3108 __ pop(itos); 3109 if (!is_static) pop_and_check_object(obj); 3110 __ movl(field, rax); 3111 if (!is_static && rc == may_rewrite) { 3112 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no); 3113 } 3114 __ jmp(Done); 3115 } 3116 3117 __ bind(notInt); 3118 __ cmpl(flags, ctos); 3119 __ jcc(Assembler::notEqual, notChar); 3120 3121 // ctos 3122 { 3123 __ pop(ctos); 3124 if (!is_static) pop_and_check_object(obj); 3125 __ movw(field, rax); 3126 if (!is_static && rc == may_rewrite) { 3127 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no); 3128 } 3129 __ jmp(Done); 3130 } 3131 3132 __ bind(notChar); 3133 __ cmpl(flags, stos); 3134 __ jcc(Assembler::notEqual, notShort); 3135 3136 // stos 3137 { 3138 __ pop(stos); 3139 if (!is_static) pop_and_check_object(obj); 3140 __ movw(field, rax); 3141 if (!is_static && rc == may_rewrite) { 3142 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no); 3143 } 3144 __ jmp(Done); 3145 } 3146 3147 __ bind(notShort); 3148 __ cmpl(flags, ltos); 3149 __ jcc(Assembler::notEqual, notLong); 3150 3151 // ltos 3152 #ifdef _LP64 3153 { 3154 __ pop(ltos); 3155 if (!is_static) pop_and_check_object(obj); 3156 __ movq(field, rax); 3157 if (!is_static && rc == may_rewrite) { 3158 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no); 3159 } 3160 __ jmp(Done); 3161 } 3162 #else 3163 { 3164 Label notVolatileLong; 3165 __ testl(rdx, rdx); 3166 __ jcc(Assembler::zero, notVolatileLong); 3167 3168 __ pop(ltos); // overwrites rdx, do this after testing volatile. 3169 if (!is_static) pop_and_check_object(obj); 3170 3171 // Replace with real volatile test 3172 __ push(rdx); 3173 __ push(rax); // Must update atomically with FIST 3174 __ fild_d(Address(rsp,0)); // So load into FPU register 3175 __ fistp_d(field); // and put into memory atomically 3176 __ addptr(rsp, 2*wordSize); 3177 // volatile_barrier(); 3178 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3179 Assembler::StoreStore)); 3180 // Don't rewrite volatile version 3181 __ jmp(notVolatile); 3182 3183 __ bind(notVolatileLong); 3184 3185 __ pop(ltos); // overwrites rdx 3186 if (!is_static) pop_and_check_object(obj); 3187 __ movptr(hi, rdx); 3188 __ movptr(field, rax); 3189 // Don't rewrite to _fast_lputfield for potential volatile case. 3190 __ jmp(notVolatile); 3191 } 3192 #endif // _LP64 3193 3194 __ bind(notLong); 3195 __ cmpl(flags, ftos); 3196 __ jcc(Assembler::notEqual, notFloat); 3197 3198 // ftos 3199 { 3200 __ pop(ftos); 3201 if (!is_static) pop_and_check_object(obj); 3202 __ store_float(field); 3203 if (!is_static && rc == may_rewrite) { 3204 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no); 3205 } 3206 __ jmp(Done); 3207 } 3208 3209 __ bind(notFloat); 3210 #ifdef ASSERT 3211 __ cmpl(flags, dtos); 3212 __ jcc(Assembler::notEqual, notDouble); 3213 #endif 3214 3215 // dtos 3216 { 3217 __ pop(dtos); 3218 if (!is_static) pop_and_check_object(obj); 3219 __ store_double(field); 3220 if (!is_static && rc == may_rewrite) { 3221 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no); 3222 } 3223 } 3224 3225 #ifdef ASSERT 3226 __ jmp(Done); 3227 3228 __ bind(notDouble); 3229 __ stop("Bad state"); 3230 #endif 3231 3232 __ bind(Done); 3233 3234 // Check for volatile store 3235 __ testl(rdx, rdx); 3236 __ jcc(Assembler::zero, notVolatile); 3237 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3238 Assembler::StoreStore)); 3239 __ bind(notVolatile); 3240 } 3241 3242 void TemplateTable::putfield(int byte_no) { 3243 putfield_or_static(byte_no, false); 3244 } 3245 3246 void TemplateTable::nofast_putfield(int byte_no) { 3247 putfield_or_static(byte_no, false, may_not_rewrite); 3248 } 3249 3250 void TemplateTable::putstatic(int byte_no) { 3251 putfield_or_static(byte_no, true); 3252 } 3253 3254 void TemplateTable::jvmti_post_fast_field_mod() { 3255 3256 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3257 3258 if (JvmtiExport::can_post_field_modification()) { 3259 // Check to see if a field modification watch has been set before 3260 // we take the time to call into the VM. 3261 Label L2; 3262 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 3263 __ testl(scratch, scratch); 3264 __ jcc(Assembler::zero, L2); 3265 __ pop_ptr(rbx); // copy the object pointer from tos 3266 __ verify_oop(rbx); 3267 __ push_ptr(rbx); // put the object pointer back on tos 3268 // Save tos values before call_VM() clobbers them. Since we have 3269 // to do it for every data type, we use the saved values as the 3270 // jvalue object. 3271 switch (bytecode()) { // load values into the jvalue object 3272 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break; 3273 case Bytecodes::_fast_bputfield: // fall through 3274 case Bytecodes::_fast_zputfield: // fall through 3275 case Bytecodes::_fast_sputfield: // fall through 3276 case Bytecodes::_fast_cputfield: // fall through 3277 case Bytecodes::_fast_iputfield: __ push_i(rax); break; 3278 case Bytecodes::_fast_dputfield: __ push(dtos); break; 3279 case Bytecodes::_fast_fputfield: __ push(ftos); break; 3280 case Bytecodes::_fast_lputfield: __ push_l(rax); break; 3281 3282 default: 3283 ShouldNotReachHere(); 3284 } 3285 __ mov(scratch, rsp); // points to jvalue on the stack 3286 // access constant pool cache entry 3287 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1)); 3288 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1)); 3289 __ verify_oop(rbx); 3290 // rbx: object pointer copied above 3291 // c_rarg2: cache entry pointer 3292 // c_rarg3: jvalue object on the stack 3293 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3)); 3294 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx)); 3295 3296 switch (bytecode()) { // restore tos values 3297 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break; 3298 case Bytecodes::_fast_bputfield: // fall through 3299 case Bytecodes::_fast_zputfield: // fall through 3300 case Bytecodes::_fast_sputfield: // fall through 3301 case Bytecodes::_fast_cputfield: // fall through 3302 case Bytecodes::_fast_iputfield: __ pop_i(rax); break; 3303 case Bytecodes::_fast_dputfield: __ pop(dtos); break; 3304 case Bytecodes::_fast_fputfield: __ pop(ftos); break; 3305 case Bytecodes::_fast_lputfield: __ pop_l(rax); break; 3306 default: break; 3307 } 3308 __ bind(L2); 3309 } 3310 } 3311 3312 void TemplateTable::fast_storefield(TosState state) { 3313 transition(state, vtos); 3314 3315 ByteSize base = ConstantPoolCache::base_offset(); 3316 3317 jvmti_post_fast_field_mod(); 3318 3319 // access constant pool cache 3320 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 3321 3322 // test for volatile with rdx but rdx is tos register for lputfield. 3323 __ movl(rdx, Address(rcx, rbx, Address::times_ptr, 3324 in_bytes(base + 3325 ConstantPoolCacheEntry::flags_offset()))); 3326 3327 // replace index with field offset from cache entry 3328 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, 3329 in_bytes(base + ConstantPoolCacheEntry::f2_offset()))); 3330 3331 // [jk] not needed currently 3332 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 3333 // Assembler::StoreStore)); 3334 3335 Label notVolatile; 3336 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3337 __ andl(rdx, 0x1); 3338 3339 // Get object from stack 3340 pop_and_check_object(rcx); 3341 3342 // field address 3343 const Address field(rcx, rbx, Address::times_1); 3344 3345 // access field 3346 switch (bytecode()) { 3347 case Bytecodes::_fast_aputfield: 3348 do_oop_store(_masm, field, rax, _bs->kind(), false); 3349 break; 3350 case Bytecodes::_fast_lputfield: 3351 #ifdef _LP64 3352 __ movq(field, rax); 3353 #else 3354 __ stop("should not be rewritten"); 3355 #endif 3356 break; 3357 case Bytecodes::_fast_iputfield: 3358 __ movl(field, rax); 3359 break; 3360 case Bytecodes::_fast_zputfield: 3361 __ andl(rax, 0x1); // boolean is true if LSB is 1 3362 // fall through to bputfield 3363 case Bytecodes::_fast_bputfield: 3364 __ movb(field, rax); 3365 break; 3366 case Bytecodes::_fast_sputfield: 3367 // fall through 3368 case Bytecodes::_fast_cputfield: 3369 __ movw(field, rax); 3370 break; 3371 case Bytecodes::_fast_fputfield: 3372 __ store_float(field); 3373 break; 3374 case Bytecodes::_fast_dputfield: 3375 __ store_double(field); 3376 break; 3377 default: 3378 ShouldNotReachHere(); 3379 } 3380 3381 // Check for volatile store 3382 __ testl(rdx, rdx); 3383 __ jcc(Assembler::zero, notVolatile); 3384 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3385 Assembler::StoreStore)); 3386 __ bind(notVolatile); 3387 } 3388 3389 void TemplateTable::fast_accessfield(TosState state) { 3390 transition(atos, state); 3391 3392 // Do the JVMTI work here to avoid disturbing the register state below 3393 if (JvmtiExport::can_post_field_access()) { 3394 // Check to see if a field access watch has been set before we 3395 // take the time to call into the VM. 3396 Label L1; 3397 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 3398 __ testl(rcx, rcx); 3399 __ jcc(Assembler::zero, L1); 3400 // access constant pool cache entry 3401 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1)); 3402 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1)); 3403 __ verify_oop(rax); 3404 __ push_ptr(rax); // save object pointer before call_VM() clobbers it 3405 LP64_ONLY(__ mov(c_rarg1, rax)); 3406 // c_rarg1: object pointer copied above 3407 // c_rarg2: cache entry pointer 3408 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2)); 3409 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx)); 3410 __ pop_ptr(rax); // restore object pointer 3411 __ bind(L1); 3412 } 3413 3414 // access constant pool cache 3415 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 3416 // replace index with field offset from cache entry 3417 // [jk] not needed currently 3418 // if (os::is_MP()) { 3419 // __ movl(rdx, Address(rcx, rbx, Address::times_8, 3420 // in_bytes(ConstantPoolCache::base_offset() + 3421 // ConstantPoolCacheEntry::flags_offset()))); 3422 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3423 // __ andl(rdx, 0x1); 3424 // } 3425 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, 3426 in_bytes(ConstantPoolCache::base_offset() + 3427 ConstantPoolCacheEntry::f2_offset()))); 3428 3429 // rax: object 3430 __ verify_oop(rax); 3431 __ null_check(rax); 3432 Address field(rax, rbx, Address::times_1); 3433 3434 // access field 3435 switch (bytecode()) { 3436 case Bytecodes::_fast_agetfield: 3437 __ load_heap_oop(rax, field); 3438 __ verify_oop(rax); 3439 break; 3440 case Bytecodes::_fast_lgetfield: 3441 #ifdef _LP64 3442 __ movq(rax, field); 3443 #else 3444 __ stop("should not be rewritten"); 3445 #endif 3446 break; 3447 case Bytecodes::_fast_igetfield: 3448 __ movl(rax, field); 3449 break; 3450 case Bytecodes::_fast_bgetfield: 3451 __ movsbl(rax, field); 3452 break; 3453 case Bytecodes::_fast_sgetfield: 3454 __ load_signed_short(rax, field); 3455 break; 3456 case Bytecodes::_fast_cgetfield: 3457 __ load_unsigned_short(rax, field); 3458 break; 3459 case Bytecodes::_fast_fgetfield: 3460 __ load_float(field); 3461 break; 3462 case Bytecodes::_fast_dgetfield: 3463 __ load_double(field); 3464 break; 3465 default: 3466 ShouldNotReachHere(); 3467 } 3468 // [jk] not needed currently 3469 // if (os::is_MP()) { 3470 // Label notVolatile; 3471 // __ testl(rdx, rdx); 3472 // __ jcc(Assembler::zero, notVolatile); 3473 // __ membar(Assembler::LoadLoad); 3474 // __ bind(notVolatile); 3475 //}; 3476 } 3477 3478 void TemplateTable::fast_xaccess(TosState state) { 3479 transition(vtos, state); 3480 3481 // get receiver 3482 __ movptr(rax, aaddress(0)); 3483 // access constant pool cache 3484 __ get_cache_and_index_at_bcp(rcx, rdx, 2); 3485 __ movptr(rbx, 3486 Address(rcx, rdx, Address::times_ptr, 3487 in_bytes(ConstantPoolCache::base_offset() + 3488 ConstantPoolCacheEntry::f2_offset()))); 3489 // make sure exception is reported in correct bcp range (getfield is 3490 // next instruction) 3491 __ increment(rbcp); 3492 __ null_check(rax); 3493 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize); 3494 switch (state) { 3495 case itos: 3496 __ movl(rax, field); 3497 break; 3498 case atos: 3499 __ load_heap_oop(rax, field); 3500 __ verify_oop(rax); 3501 break; 3502 case ftos: 3503 __ load_float(field); 3504 break; 3505 default: 3506 ShouldNotReachHere(); 3507 } 3508 3509 // [jk] not needed currently 3510 // if (os::is_MP()) { 3511 // Label notVolatile; 3512 // __ movl(rdx, Address(rcx, rdx, Address::times_8, 3513 // in_bytes(ConstantPoolCache::base_offset() + 3514 // ConstantPoolCacheEntry::flags_offset()))); 3515 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3516 // __ testl(rdx, 0x1); 3517 // __ jcc(Assembler::zero, notVolatile); 3518 // __ membar(Assembler::LoadLoad); 3519 // __ bind(notVolatile); 3520 // } 3521 3522 __ decrement(rbcp); 3523 } 3524 3525 //----------------------------------------------------------------------------- 3526 // Calls 3527 3528 void TemplateTable::count_calls(Register method, Register temp) { 3529 // implemented elsewhere 3530 ShouldNotReachHere(); 3531 } 3532 3533 void TemplateTable::prepare_invoke(int byte_no, 3534 Register method, // linked method (or i-klass) 3535 Register index, // itable index, MethodType, etc. 3536 Register recv, // if caller wants to see it 3537 Register flags // if caller wants to test it 3538 ) { 3539 // determine flags 3540 const Bytecodes::Code code = bytecode(); 3541 const bool is_invokeinterface = code == Bytecodes::_invokeinterface; 3542 const bool is_invokedynamic = code == Bytecodes::_invokedynamic; 3543 const bool is_invokehandle = code == Bytecodes::_invokehandle; 3544 const bool is_invokevirtual = code == Bytecodes::_invokevirtual; 3545 const bool is_invokespecial = code == Bytecodes::_invokespecial; 3546 const bool load_receiver = (recv != noreg); 3547 const bool save_flags = (flags != noreg); 3548 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), ""); 3549 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal"); 3550 assert(flags == noreg || flags == rdx, ""); 3551 assert(recv == noreg || recv == rcx, ""); 3552 3553 // setup registers & access constant pool cache 3554 if (recv == noreg) recv = rcx; 3555 if (flags == noreg) flags = rdx; 3556 assert_different_registers(method, index, recv, flags); 3557 3558 // save 'interpreter return address' 3559 __ save_bcp(); 3560 3561 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic); 3562 3563 // maybe push appendix to arguments (just before return address) 3564 if (is_invokedynamic || is_invokehandle) { 3565 Label L_no_push; 3566 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift)); 3567 __ jcc(Assembler::zero, L_no_push); 3568 // Push the appendix as a trailing parameter. 3569 // This must be done before we get the receiver, 3570 // since the parameter_size includes it. 3571 __ push(rbx); 3572 __ mov(rbx, index); 3573 assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0"); 3574 __ load_resolved_reference_at_index(index, rbx); 3575 __ pop(rbx); 3576 __ push(index); // push appendix (MethodType, CallSite, etc.) 3577 __ bind(L_no_push); 3578 } 3579 3580 // load receiver if needed (after appendix is pushed so parameter size is correct) 3581 // Note: no return address pushed yet 3582 if (load_receiver) { 3583 __ movl(recv, flags); 3584 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask); 3585 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address 3586 const int receiver_is_at_end = -1; // back off one slot to get receiver 3587 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end); 3588 __ movptr(recv, recv_addr); 3589 __ verify_oop(recv); 3590 } 3591 3592 if (save_flags) { 3593 __ movl(rbcp, flags); 3594 } 3595 3596 // compute return type 3597 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 3598 // Make sure we don't need to mask flags after the above shift 3599 ConstantPoolCacheEntry::verify_tos_state_shift(); 3600 // load return address 3601 { 3602 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code); 3603 ExternalAddress table(table_addr); 3604 LP64_ONLY(__ lea(rscratch1, table)); 3605 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr))); 3606 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr)))); 3607 } 3608 3609 // push return address 3610 __ push(flags); 3611 3612 // Restore flags value from the constant pool cache, and restore rsi 3613 // for later null checks. r13 is the bytecode pointer 3614 if (save_flags) { 3615 __ movl(flags, rbcp); 3616 __ restore_bcp(); 3617 } 3618 } 3619 3620 void TemplateTable::invokevirtual_helper(Register index, 3621 Register recv, 3622 Register flags) { 3623 // Uses temporary registers rax, rdx 3624 assert_different_registers(index, recv, rax, rdx); 3625 assert(index == rbx, ""); 3626 assert(recv == rcx, ""); 3627 3628 // Test for an invoke of a final method 3629 Label notFinal; 3630 __ movl(rax, flags); 3631 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift)); 3632 __ jcc(Assembler::zero, notFinal); 3633 3634 const Register method = index; // method must be rbx 3635 assert(method == rbx, 3636 "Method* must be rbx for interpreter calling convention"); 3637 3638 // do the call - the index is actually the method to call 3639 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method* 3640 3641 // It's final, need a null check here! 3642 __ null_check(recv); 3643 3644 // profile this call 3645 __ profile_final_call(rax); 3646 __ profile_arguments_type(rax, method, rbcp, true); 3647 3648 __ jump_from_interpreted(method, rax); 3649 3650 __ bind(notFinal); 3651 3652 // get receiver klass 3653 __ null_check(recv, oopDesc::klass_offset_in_bytes()); 3654 __ load_klass(rax, recv); 3655 3656 // profile this call 3657 __ profile_virtual_call(rax, rlocals, rdx); 3658 // get target Method* & entry point 3659 __ lookup_virtual_method(rax, index, method); 3660 __ profile_called_method(method, rdx, rbcp); 3661 3662 __ profile_arguments_type(rdx, method, rbcp, true); 3663 __ jump_from_interpreted(method, rdx); 3664 } 3665 3666 void TemplateTable::invokevirtual(int byte_no) { 3667 transition(vtos, vtos); 3668 assert(byte_no == f2_byte, "use this argument"); 3669 prepare_invoke(byte_no, 3670 rbx, // method or vtable index 3671 noreg, // unused itable index 3672 rcx, rdx); // recv, flags 3673 3674 // rbx: index 3675 // rcx: receiver 3676 // rdx: flags 3677 3678 invokevirtual_helper(rbx, rcx, rdx); 3679 } 3680 3681 void TemplateTable::invokespecial(int byte_no) { 3682 transition(vtos, vtos); 3683 assert(byte_no == f1_byte, "use this argument"); 3684 prepare_invoke(byte_no, rbx, noreg, // get f1 Method* 3685 rcx); // get receiver also for null check 3686 __ verify_oop(rcx); 3687 __ null_check(rcx); 3688 // do the call 3689 __ profile_call(rax); 3690 __ profile_arguments_type(rax, rbx, rbcp, false); 3691 __ jump_from_interpreted(rbx, rax); 3692 } 3693 3694 void TemplateTable::invokestatic(int byte_no) { 3695 transition(vtos, vtos); 3696 assert(byte_no == f1_byte, "use this argument"); 3697 prepare_invoke(byte_no, rbx); // get f1 Method* 3698 // do the call 3699 __ profile_call(rax); 3700 __ profile_arguments_type(rax, rbx, rbcp, false); 3701 __ jump_from_interpreted(rbx, rax); 3702 } 3703 3704 3705 void TemplateTable::fast_invokevfinal(int byte_no) { 3706 transition(vtos, vtos); 3707 assert(byte_no == f2_byte, "use this argument"); 3708 __ stop("fast_invokevfinal not used on x86"); 3709 } 3710 3711 3712 void TemplateTable::invokeinterface(int byte_no) { 3713 transition(vtos, vtos); 3714 assert(byte_no == f1_byte, "use this argument"); 3715 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 itable index 3716 rcx, rdx); // recv, flags 3717 3718 // rax: interface klass (from f1) 3719 // rbx: itable index (from f2) 3720 // rcx: receiver 3721 // rdx: flags 3722 3723 // Special case of invokeinterface called for virtual method of 3724 // java.lang.Object. See cpCacheOop.cpp for details. 3725 // This code isn't produced by javac, but could be produced by 3726 // another compliant java compiler. 3727 Label notMethod; 3728 __ movl(rlocals, rdx); 3729 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift)); 3730 3731 __ jcc(Assembler::zero, notMethod); 3732 3733 invokevirtual_helper(rbx, rcx, rdx); 3734 __ bind(notMethod); 3735 3736 // Get receiver klass into rdx - also a null check 3737 __ restore_locals(); // restore r14 3738 __ null_check(rcx, oopDesc::klass_offset_in_bytes()); 3739 __ load_klass(rdx, rcx); 3740 3741 // profile this call 3742 __ profile_virtual_call(rdx, rbcp, rlocals); 3743 3744 Label no_such_interface, no_such_method; 3745 3746 __ lookup_interface_method(// inputs: rec. class, interface, itable index 3747 rdx, rax, rbx, 3748 // outputs: method, scan temp. reg 3749 rbx, rbcp, 3750 no_such_interface); 3751 3752 // rbx: Method* to call 3753 // rcx: receiver 3754 // Check for abstract method error 3755 // Note: This should be done more efficiently via a throw_abstract_method_error 3756 // interpreter entry point and a conditional jump to it in case of a null 3757 // method. 3758 __ testptr(rbx, rbx); 3759 __ jcc(Assembler::zero, no_such_method); 3760 3761 __ profile_called_method(rbx, rbcp, rdx); 3762 __ profile_arguments_type(rdx, rbx, rbcp, true); 3763 3764 // do the call 3765 // rcx: receiver 3766 // rbx,: Method* 3767 __ jump_from_interpreted(rbx, rdx); 3768 __ should_not_reach_here(); 3769 3770 // exception handling code follows... 3771 // note: must restore interpreter registers to canonical 3772 // state for exception handling to work correctly! 3773 3774 __ bind(no_such_method); 3775 // throw exception 3776 __ pop(rbx); // pop return address (pushed by prepare_invoke) 3777 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed) 3778 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3779 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); 3780 // the call_VM checks for exception, so we should never return here. 3781 __ should_not_reach_here(); 3782 3783 __ bind(no_such_interface); 3784 // throw exception 3785 __ pop(rbx); // pop return address (pushed by prepare_invoke) 3786 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed) 3787 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3788 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 3789 InterpreterRuntime::throw_IncompatibleClassChangeError)); 3790 // the call_VM checks for exception, so we should never return here. 3791 __ should_not_reach_here(); 3792 } 3793 3794 void TemplateTable::invokehandle(int byte_no) { 3795 transition(vtos, vtos); 3796 assert(byte_no == f1_byte, "use this argument"); 3797 const Register rbx_method = rbx; 3798 const Register rax_mtype = rax; 3799 const Register rcx_recv = rcx; 3800 const Register rdx_flags = rdx; 3801 3802 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv); 3803 __ verify_method_ptr(rbx_method); 3804 __ verify_oop(rcx_recv); 3805 __ null_check(rcx_recv); 3806 3807 // rax: MethodType object (from cpool->resolved_references[f1], if necessary) 3808 // rbx: MH.invokeExact_MT method (from f2) 3809 3810 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke 3811 3812 // FIXME: profile the LambdaForm also 3813 __ profile_final_call(rax); 3814 __ profile_arguments_type(rdx, rbx_method, rbcp, true); 3815 3816 __ jump_from_interpreted(rbx_method, rdx); 3817 } 3818 3819 void TemplateTable::invokedynamic(int byte_no) { 3820 transition(vtos, vtos); 3821 assert(byte_no == f1_byte, "use this argument"); 3822 3823 const Register rbx_method = rbx; 3824 const Register rax_callsite = rax; 3825 3826 prepare_invoke(byte_no, rbx_method, rax_callsite); 3827 3828 // rax: CallSite object (from cpool->resolved_references[f1]) 3829 // rbx: MH.linkToCallSite method (from f2) 3830 3831 // Note: rax_callsite is already pushed by prepare_invoke 3832 3833 // %%% should make a type profile for any invokedynamic that takes a ref argument 3834 // profile this call 3835 __ profile_call(rbcp); 3836 __ profile_arguments_type(rdx, rbx_method, rbcp, false); 3837 3838 __ verify_oop(rax_callsite); 3839 3840 __ jump_from_interpreted(rbx_method, rdx); 3841 } 3842 3843 //----------------------------------------------------------------------------- 3844 // Allocation 3845 3846 void TemplateTable::_new() { 3847 transition(vtos, atos); 3848 __ get_unsigned_2_byte_index_at_bcp(rdx, 1); 3849 Label slow_case; 3850 Label slow_case_no_pop; 3851 Label done; 3852 Label initialize_header; 3853 Label initialize_object; // including clearing the fields 3854 3855 __ get_cpool_and_tags(rcx, rax); 3856 3857 // Make sure the class we're about to instantiate has been resolved. 3858 // This is done before loading InstanceKlass to be consistent with the order 3859 // how Constant Pool is updated (see ConstantPool::klass_at_put) 3860 const int tags_offset = Array<u1>::base_offset_in_bytes(); 3861 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class); 3862 __ jcc(Assembler::notEqual, slow_case_no_pop); 3863 3864 // get InstanceKlass 3865 __ load_resolved_klass_at_index(rcx, rdx, rcx); 3866 __ push(rcx); // save the contexts of klass for initializing the header 3867 3868 // make sure klass is initialized & doesn't have finalizer 3869 // make sure klass is fully initialized 3870 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized); 3871 __ jcc(Assembler::notEqual, slow_case); 3872 3873 // get instance_size in InstanceKlass (scaled to a count of bytes) 3874 __ movl(rdx, Address(rcx, Klass::layout_helper_offset())); 3875 // test to see if it has a finalizer or is malformed in some way 3876 __ testl(rdx, Klass::_lh_instance_slow_path_bit); 3877 __ jcc(Assembler::notZero, slow_case); 3878 3879 // Allocate the instance: 3880 // If TLAB is enabled: 3881 // Try to allocate in the TLAB. 3882 // If fails, go to the slow path. 3883 // Else If inline contiguous allocations are enabled: 3884 // Try to allocate in eden. 3885 // If fails due to heap end, go to slow path. 3886 // 3887 // If TLAB is enabled OR inline contiguous is enabled: 3888 // Initialize the allocation. 3889 // Exit. 3890 // 3891 // Go to slow path. 3892 3893 const bool allow_shared_alloc = 3894 Universe::heap()->supports_inline_contig_alloc(); 3895 3896 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 3897 #ifndef _LP64 3898 if (UseTLAB || allow_shared_alloc) { 3899 __ get_thread(thread); 3900 } 3901 #endif // _LP64 3902 3903 if (UseTLAB) { 3904 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset()))); 3905 __ lea(rbx, Address(rax, rdx, Address::times_1)); 3906 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_current_end_offset()))); 3907 __ jcc(Assembler::above, slow_case); 3908 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx); 3909 if (ZeroTLAB) { 3910 // the fields have been already cleared 3911 __ jmp(initialize_header); 3912 } else { 3913 // initialize both the header and fields 3914 __ jmp(initialize_object); 3915 } 3916 } else { 3917 // Allocation in the shared Eden, if allowed. 3918 // 3919 // rdx: instance size in bytes 3920 if (allow_shared_alloc) { 3921 ExternalAddress heap_top((address)Universe::heap()->top_addr()); 3922 ExternalAddress heap_end((address)Universe::heap()->end_addr()); 3923 3924 Label retry; 3925 __ bind(retry); 3926 __ movptr(rax, heap_top); 3927 __ lea(rbx, Address(rax, rdx, Address::times_1)); 3928 __ cmpptr(rbx, heap_end); 3929 __ jcc(Assembler::above, slow_case); 3930 3931 // Compare rax, with the top addr, and if still equal, store the new 3932 // top addr in rbx, at the address of the top addr pointer. Sets ZF if was 3933 // equal, and clears it otherwise. Use lock prefix for atomicity on MPs. 3934 // 3935 // rax,: object begin 3936 // rbx,: object end 3937 // rdx: instance size in bytes 3938 __ locked_cmpxchgptr(rbx, heap_top); 3939 3940 // if someone beat us on the allocation, try again, otherwise continue 3941 __ jcc(Assembler::notEqual, retry); 3942 3943 __ incr_allocated_bytes(thread, rdx, 0); 3944 } 3945 } 3946 3947 // If UseTLAB or allow_shared_alloc are true, the object is created above and 3948 // there is an initialize need. Otherwise, skip and go to the slow path. 3949 if (UseTLAB || allow_shared_alloc) { 3950 // The object is initialized before the header. If the object size is 3951 // zero, go directly to the header initialization. 3952 __ bind(initialize_object); 3953 __ decrement(rdx, sizeof(oopDesc)); 3954 __ jcc(Assembler::zero, initialize_header); 3955 3956 // Initialize topmost object field, divide rdx by 8, check if odd and 3957 // test if zero. 3958 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) 3959 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd 3960 3961 // rdx must have been multiple of 8 3962 #ifdef ASSERT 3963 // make sure rdx was multiple of 8 3964 Label L; 3965 // Ignore partial flag stall after shrl() since it is debug VM 3966 __ jccb(Assembler::carryClear, L); 3967 __ stop("object size is not multiple of 2 - adjust this code"); 3968 __ bind(L); 3969 // rdx must be > 0, no extra check needed here 3970 #endif 3971 3972 // initialize remaining object fields: rdx was a multiple of 8 3973 { Label loop; 3974 __ bind(loop); 3975 __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx); 3976 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx)); 3977 __ decrement(rdx); 3978 __ jcc(Assembler::notZero, loop); 3979 } 3980 3981 // initialize object header only. 3982 __ bind(initialize_header); 3983 if (UseBiasedLocking) { 3984 __ pop(rcx); // get saved klass back in the register. 3985 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset())); 3986 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx); 3987 } else { 3988 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), 3989 (intptr_t)markOopDesc::prototype()); // header 3990 __ pop(rcx); // get saved klass back in the register. 3991 } 3992 #ifdef _LP64 3993 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code) 3994 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops 3995 #endif 3996 __ store_klass(rax, rcx); // klass 3997 3998 { 3999 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0); 4000 // Trigger dtrace event for fastpath 4001 __ push(atos); 4002 __ call_VM_leaf( 4003 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax); 4004 __ pop(atos); 4005 } 4006 4007 __ jmp(done); 4008 } 4009 4010 // slow case 4011 __ bind(slow_case); 4012 __ pop(rcx); // restore stack pointer to what it was when we came in. 4013 __ bind(slow_case_no_pop); 4014 4015 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax); 4016 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 4017 4018 __ get_constant_pool(rarg1); 4019 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4020 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2); 4021 __ verify_oop(rax); 4022 4023 // continue 4024 __ bind(done); 4025 } 4026 4027 void TemplateTable::newarray() { 4028 transition(itos, atos); 4029 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4030 __ load_unsigned_byte(rarg1, at_bcp(1)); 4031 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), 4032 rarg1, rax); 4033 } 4034 4035 void TemplateTable::anewarray() { 4036 transition(itos, atos); 4037 4038 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4039 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 4040 4041 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4042 __ get_constant_pool(rarg1); 4043 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), 4044 rarg1, rarg2, rax); 4045 } 4046 4047 void TemplateTable::arraylength() { 4048 transition(atos, itos); 4049 __ null_check(rax, arrayOopDesc::length_offset_in_bytes()); 4050 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes())); 4051 } 4052 4053 void TemplateTable::checkcast() { 4054 transition(atos, atos); 4055 Label done, is_null, ok_is_subtype, quicked, resolved; 4056 __ testptr(rax, rax); // object is in rax 4057 __ jcc(Assembler::zero, is_null); 4058 4059 // Get cpool & tags index 4060 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 4061 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 4062 // See if bytecode has already been quicked 4063 __ cmpb(Address(rdx, rbx, 4064 Address::times_1, 4065 Array<u1>::base_offset_in_bytes()), 4066 JVM_CONSTANT_Class); 4067 __ jcc(Assembler::equal, quicked); 4068 __ push(atos); // save receiver for result, and for GC 4069 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4070 4071 // vm_result_2 has metadata result 4072 #ifndef _LP64 4073 // borrow rdi from locals 4074 __ get_thread(rdi); 4075 __ get_vm_result_2(rax, rdi); 4076 __ restore_locals(); 4077 #else 4078 __ get_vm_result_2(rax, r15_thread); 4079 #endif 4080 4081 __ pop_ptr(rdx); // restore receiver 4082 __ jmpb(resolved); 4083 4084 // Get superklass in rax and subklass in rbx 4085 __ bind(quicked); 4086 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check 4087 __ load_resolved_klass_at_index(rcx, rbx, rax); 4088 4089 __ bind(resolved); 4090 __ load_klass(rbx, rdx); 4091 4092 // Generate subtype check. Blows rcx, rdi. Object in rdx. 4093 // Superklass in rax. Subklass in rbx. 4094 __ gen_subtype_check(rbx, ok_is_subtype); 4095 4096 // Come here on failure 4097 __ push_ptr(rdx); 4098 // object is at TOS 4099 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry)); 4100 4101 // Come here on success 4102 __ bind(ok_is_subtype); 4103 __ mov(rax, rdx); // Restore object in rdx 4104 4105 // Collect counts on whether this check-cast sees NULLs a lot or not. 4106 if (ProfileInterpreter) { 4107 __ jmp(done); 4108 __ bind(is_null); 4109 __ profile_null_seen(rcx); 4110 } else { 4111 __ bind(is_null); // same as 'done' 4112 } 4113 __ bind(done); 4114 } 4115 4116 void TemplateTable::instanceof() { 4117 transition(atos, itos); 4118 Label done, is_null, ok_is_subtype, quicked, resolved; 4119 __ testptr(rax, rax); 4120 __ jcc(Assembler::zero, is_null); 4121 4122 // Get cpool & tags index 4123 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 4124 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 4125 // See if bytecode has already been quicked 4126 __ cmpb(Address(rdx, rbx, 4127 Address::times_1, 4128 Array<u1>::base_offset_in_bytes()), 4129 JVM_CONSTANT_Class); 4130 __ jcc(Assembler::equal, quicked); 4131 4132 __ push(atos); // save receiver for result, and for GC 4133 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4134 // vm_result_2 has metadata result 4135 4136 #ifndef _LP64 4137 // borrow rdi from locals 4138 __ get_thread(rdi); 4139 __ get_vm_result_2(rax, rdi); 4140 __ restore_locals(); 4141 #else 4142 __ get_vm_result_2(rax, r15_thread); 4143 #endif 4144 4145 __ pop_ptr(rdx); // restore receiver 4146 __ verify_oop(rdx); 4147 __ load_klass(rdx, rdx); 4148 __ jmpb(resolved); 4149 4150 // Get superklass in rax and subklass in rdx 4151 __ bind(quicked); 4152 __ load_klass(rdx, rax); 4153 __ load_resolved_klass_at_index(rcx, rbx, rax); 4154 4155 __ bind(resolved); 4156 4157 // Generate subtype check. Blows rcx, rdi 4158 // Superklass in rax. Subklass in rdx. 4159 __ gen_subtype_check(rdx, ok_is_subtype); 4160 4161 // Come here on failure 4162 __ xorl(rax, rax); 4163 __ jmpb(done); 4164 // Come here on success 4165 __ bind(ok_is_subtype); 4166 __ movl(rax, 1); 4167 4168 // Collect counts on whether this test sees NULLs a lot or not. 4169 if (ProfileInterpreter) { 4170 __ jmp(done); 4171 __ bind(is_null); 4172 __ profile_null_seen(rcx); 4173 } else { 4174 __ bind(is_null); // same as 'done' 4175 } 4176 __ bind(done); 4177 // rax = 0: obj == NULL or obj is not an instanceof the specified klass 4178 // rax = 1: obj != NULL and obj is an instanceof the specified klass 4179 } 4180 4181 4182 //---------------------------------------------------------------------------------------------------- 4183 // Breakpoints 4184 void TemplateTable::_breakpoint() { 4185 // Note: We get here even if we are single stepping.. 4186 // jbug insists on setting breakpoints at every bytecode 4187 // even if we are in single step mode. 4188 4189 transition(vtos, vtos); 4190 4191 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4192 4193 // get the unpatched byte code 4194 __ get_method(rarg); 4195 __ call_VM(noreg, 4196 CAST_FROM_FN_PTR(address, 4197 InterpreterRuntime::get_original_bytecode_at), 4198 rarg, rbcp); 4199 __ mov(rbx, rax); // why? 4200 4201 // post the breakpoint event 4202 __ get_method(rarg); 4203 __ call_VM(noreg, 4204 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), 4205 rarg, rbcp); 4206 4207 // complete the execution of original bytecode 4208 __ dispatch_only_normal(vtos); 4209 } 4210 4211 //----------------------------------------------------------------------------- 4212 // Exceptions 4213 4214 void TemplateTable::athrow() { 4215 transition(atos, vtos); 4216 __ null_check(rax); 4217 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 4218 } 4219 4220 //----------------------------------------------------------------------------- 4221 // Synchronization 4222 // 4223 // Note: monitorenter & exit are symmetric routines; which is reflected 4224 // in the assembly code structure as well 4225 // 4226 // Stack layout: 4227 // 4228 // [expressions ] <--- rsp = expression stack top 4229 // .. 4230 // [expressions ] 4231 // [monitor entry] <--- monitor block top = expression stack bot 4232 // .. 4233 // [monitor entry] 4234 // [frame data ] <--- monitor block bot 4235 // ... 4236 // [saved rbp ] <--- rbp 4237 void TemplateTable::monitorenter() { 4238 transition(atos, vtos); 4239 4240 // check for NULL object 4241 __ null_check(rax); 4242 4243 const Address monitor_block_top( 4244 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4245 const Address monitor_block_bot( 4246 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 4247 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4248 4249 Label allocated; 4250 4251 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 4252 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx); 4253 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4254 4255 // initialize entry pointer 4256 __ xorl(rmon, rmon); // points to free slot or NULL 4257 4258 // find a free slot in the monitor block (result in rmon) 4259 { 4260 Label entry, loop, exit; 4261 __ movptr(rtop, monitor_block_top); // points to current entry, 4262 // starting with top-most entry 4263 __ lea(rbot, monitor_block_bot); // points to word before bottom 4264 // of monitor block 4265 __ jmpb(entry); 4266 4267 __ bind(loop); 4268 // check if current entry is used 4269 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD); 4270 // if not used then remember entry in rmon 4271 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr 4272 // check if current entry is for same object 4273 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes())); 4274 // if same object then stop searching 4275 __ jccb(Assembler::equal, exit); 4276 // otherwise advance to next entry 4277 __ addptr(rtop, entry_size); 4278 __ bind(entry); 4279 // check if bottom reached 4280 __ cmpptr(rtop, rbot); 4281 // if not at bottom then check this entry 4282 __ jcc(Assembler::notEqual, loop); 4283 __ bind(exit); 4284 } 4285 4286 __ testptr(rmon, rmon); // check if a slot has been found 4287 __ jcc(Assembler::notZero, allocated); // if found, continue with that one 4288 4289 // allocate one if there's no free slot 4290 { 4291 Label entry, loop; 4292 // 1. compute new pointers // rsp: old expression stack top 4293 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom 4294 __ subptr(rsp, entry_size); // move expression stack top 4295 __ subptr(rmon, entry_size); // move expression stack bottom 4296 __ mov(rtop, rsp); // set start value for copy loop 4297 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom 4298 __ jmp(entry); 4299 // 2. move expression stack contents 4300 __ bind(loop); 4301 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack 4302 // word from old location 4303 __ movptr(Address(rtop, 0), rbot); // and store it at new location 4304 __ addptr(rtop, wordSize); // advance to next word 4305 __ bind(entry); 4306 __ cmpptr(rtop, rmon); // check if bottom reached 4307 __ jcc(Assembler::notEqual, loop); // if not at bottom then 4308 // copy next word 4309 } 4310 4311 // call run-time routine 4312 // rmon: points to monitor entry 4313 __ bind(allocated); 4314 4315 // Increment bcp to point to the next bytecode, so exception 4316 // handling for async. exceptions work correctly. 4317 // The object has already been poped from the stack, so the 4318 // expression stack looks correct. 4319 __ increment(rbcp); 4320 4321 // store object 4322 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax); 4323 __ lock_object(rmon); 4324 4325 // check to make sure this monitor doesn't cause stack overflow after locking 4326 __ save_bcp(); // in case of exception 4327 __ generate_stack_overflow_check(0); 4328 4329 // The bcp has already been incremented. Just need to dispatch to 4330 // next instruction. 4331 __ dispatch_next(vtos); 4332 } 4333 4334 void TemplateTable::monitorexit() { 4335 transition(atos, vtos); 4336 4337 // check for NULL object 4338 __ null_check(rax); 4339 4340 const Address monitor_block_top( 4341 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4342 const Address monitor_block_bot( 4343 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 4344 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4345 4346 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4347 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx); 4348 4349 Label found; 4350 4351 // find matching slot 4352 { 4353 Label entry, loop; 4354 __ movptr(rtop, monitor_block_top); // points to current entry, 4355 // starting with top-most entry 4356 __ lea(rbot, monitor_block_bot); // points to word before bottom 4357 // of monitor block 4358 __ jmpb(entry); 4359 4360 __ bind(loop); 4361 // check if current entry is for same object 4362 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes())); 4363 // if same object then stop searching 4364 __ jcc(Assembler::equal, found); 4365 // otherwise advance to next entry 4366 __ addptr(rtop, entry_size); 4367 __ bind(entry); 4368 // check if bottom reached 4369 __ cmpptr(rtop, rbot); 4370 // if not at bottom then check this entry 4371 __ jcc(Assembler::notEqual, loop); 4372 } 4373 4374 // error handling. Unlocking was not block-structured 4375 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 4376 InterpreterRuntime::throw_illegal_monitor_state_exception)); 4377 __ should_not_reach_here(); 4378 4379 // call run-time routine 4380 __ bind(found); 4381 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps) 4382 __ unlock_object(rtop); 4383 __ pop_ptr(rax); // discard object 4384 } 4385 4386 // Wide instructions 4387 void TemplateTable::wide() { 4388 transition(vtos, vtos); 4389 __ load_unsigned_byte(rbx, at_bcp(1)); 4390 ExternalAddress wtable((address)Interpreter::_wentry_point); 4391 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr))); 4392 // Note: the rbcp increment step is part of the individual wide bytecode implementations 4393 } 4394 4395 // Multi arrays 4396 void TemplateTable::multianewarray() { 4397 transition(vtos, atos); 4398 4399 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax); 4400 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions 4401 // last dim is on top of stack; we want address of first one: 4402 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize 4403 // the latter wordSize to point to the beginning of the array. 4404 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize)); 4405 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg); 4406 __ load_unsigned_byte(rbx, at_bcp(3)); 4407 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts 4408 }