1 /* 2 * Copyright (c) 1997, 2018, 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 "compiler/disassembler.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "interpreter/interpreterRuntime.hpp" 30 #include "interpreter/interp_masm.hpp" 31 #include "interpreter/templateTable.hpp" 32 #include "memory/universe.hpp" 33 #include "oops/methodData.hpp" 34 #include "oops/objArrayKlass.hpp" 35 #include "oops/oop.inline.hpp" 36 #include "prims/methodHandles.hpp" 37 #include "runtime/frame.inline.hpp" 38 #include "runtime/safepointMechanism.hpp" 39 #include "runtime/sharedRuntime.hpp" 40 #include "runtime/stubRoutines.hpp" 41 #include "runtime/synchronizer.hpp" 42 #include "utilities/macros.hpp" 43 44 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)-> 45 46 // Global Register Names 47 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi); 48 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi); 49 50 // Platform-dependent initialization 51 void TemplateTable::pd_initialize() { 52 // No x86 specific initialization 53 } 54 55 // Address Computation: local variables 56 static inline Address iaddress(int n) { 57 return Address(rlocals, Interpreter::local_offset_in_bytes(n)); 58 } 59 60 static inline Address laddress(int n) { 61 return iaddress(n + 1); 62 } 63 64 #ifndef _LP64 65 static inline Address haddress(int n) { 66 return iaddress(n + 0); 67 } 68 #endif 69 70 static inline Address faddress(int n) { 71 return iaddress(n); 72 } 73 74 static inline Address daddress(int n) { 75 return laddress(n); 76 } 77 78 static inline Address aaddress(int n) { 79 return iaddress(n); 80 } 81 82 static inline Address iaddress(Register r) { 83 return Address(rlocals, r, Address::times_ptr); 84 } 85 86 static inline Address laddress(Register r) { 87 return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1)); 88 } 89 90 #ifndef _LP64 91 static inline Address haddress(Register r) { 92 return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0)); 93 } 94 #endif 95 96 static inline Address faddress(Register r) { 97 return iaddress(r); 98 } 99 100 static inline Address daddress(Register r) { 101 return laddress(r); 102 } 103 104 static inline Address aaddress(Register r) { 105 return iaddress(r); 106 } 107 108 109 // expression stack 110 // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store 111 // data beyond the rsp which is potentially unsafe in an MT environment; 112 // an interrupt may overwrite that data.) 113 static inline Address at_rsp () { 114 return Address(rsp, 0); 115 } 116 117 // At top of Java expression stack which may be different than esp(). It 118 // isn't for category 1 objects. 119 static inline Address at_tos () { 120 return Address(rsp, Interpreter::expr_offset_in_bytes(0)); 121 } 122 123 static inline Address at_tos_p1() { 124 return Address(rsp, Interpreter::expr_offset_in_bytes(1)); 125 } 126 127 static inline Address at_tos_p2() { 128 return Address(rsp, Interpreter::expr_offset_in_bytes(2)); 129 } 130 131 // Condition conversion 132 static Assembler::Condition j_not(TemplateTable::Condition cc) { 133 switch (cc) { 134 case TemplateTable::equal : return Assembler::notEqual; 135 case TemplateTable::not_equal : return Assembler::equal; 136 case TemplateTable::less : return Assembler::greaterEqual; 137 case TemplateTable::less_equal : return Assembler::greater; 138 case TemplateTable::greater : return Assembler::lessEqual; 139 case TemplateTable::greater_equal: return Assembler::less; 140 } 141 ShouldNotReachHere(); 142 return Assembler::zero; 143 } 144 145 146 147 // Miscelaneous helper routines 148 // Store an oop (or NULL) at the address described by obj. 149 // If val == noreg this means store a NULL 150 151 152 static void do_oop_store(InterpreterMacroAssembler* _masm, 153 Address dst, 154 Register val, 155 DecoratorSet decorators = 0) { 156 assert(val == noreg || val == rax, "parameter is just for looks"); 157 __ store_heap_oop(dst, val, rdx, rbx, decorators); 158 } 159 160 static void do_oop_load(InterpreterMacroAssembler* _masm, 161 Address src, 162 Register dst, 163 DecoratorSet decorators = 0) { 164 __ load_heap_oop(dst, src, rdx, rbx, decorators); 165 } 166 167 Address TemplateTable::at_bcp(int offset) { 168 assert(_desc->uses_bcp(), "inconsistent uses_bcp information"); 169 return Address(rbcp, offset); 170 } 171 172 173 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg, 174 Register temp_reg, bool load_bc_into_bc_reg/*=true*/, 175 int byte_no) { 176 if (!RewriteBytecodes) return; 177 Label L_patch_done; 178 179 switch (bc) { 180 case Bytecodes::_fast_qputfield: 181 case Bytecodes::_fast_aputfield: 182 case Bytecodes::_fast_bputfield: 183 case Bytecodes::_fast_zputfield: 184 case Bytecodes::_fast_cputfield: 185 case Bytecodes::_fast_dputfield: 186 case Bytecodes::_fast_fputfield: 187 case Bytecodes::_fast_iputfield: 188 case Bytecodes::_fast_lputfield: 189 case Bytecodes::_fast_sputfield: 190 { 191 // We skip bytecode quickening for putfield instructions when 192 // the put_code written to the constant pool cache is zero. 193 // This is required so that every execution of this instruction 194 // calls out to InterpreterRuntime::resolve_get_put to do 195 // additional, required work. 196 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 197 assert(load_bc_into_bc_reg, "we use bc_reg as temp"); 198 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1); 199 __ movl(bc_reg, bc); 200 __ cmpl(temp_reg, (int) 0); 201 __ jcc(Assembler::zero, L_patch_done); // don't patch 202 } 203 break; 204 default: 205 assert(byte_no == -1, "sanity"); 206 // the pair bytecodes have already done the load. 207 if (load_bc_into_bc_reg) { 208 __ movl(bc_reg, bc); 209 } 210 } 211 212 if (JvmtiExport::can_post_breakpoint()) { 213 Label L_fast_patch; 214 // if a breakpoint is present we can't rewrite the stream directly 215 __ movzbl(temp_reg, at_bcp(0)); 216 __ cmpl(temp_reg, Bytecodes::_breakpoint); 217 __ jcc(Assembler::notEqual, L_fast_patch); 218 __ get_method(temp_reg); 219 // Let breakpoint table handling rewrite to quicker bytecode 220 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg); 221 #ifndef ASSERT 222 __ jmpb(L_patch_done); 223 #else 224 __ jmp(L_patch_done); 225 #endif 226 __ bind(L_fast_patch); 227 } 228 229 #ifdef ASSERT 230 Label L_okay; 231 __ load_unsigned_byte(temp_reg, at_bcp(0)); 232 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc)); 233 __ jcc(Assembler::equal, L_okay); 234 __ cmpl(temp_reg, bc_reg); 235 __ jcc(Assembler::equal, L_okay); 236 __ stop("patching the wrong bytecode"); 237 __ bind(L_okay); 238 #endif 239 240 // patch bytecode 241 __ movb(at_bcp(0), bc_reg); 242 __ bind(L_patch_done); 243 } 244 // Individual instructions 245 246 247 void TemplateTable::nop() { 248 transition(vtos, vtos); 249 // nothing to do 250 } 251 252 void TemplateTable::shouldnotreachhere() { 253 transition(vtos, vtos); 254 __ stop("shouldnotreachhere bytecode"); 255 } 256 257 void TemplateTable::aconst_null() { 258 transition(vtos, atos); 259 __ xorl(rax, rax); 260 } 261 262 void TemplateTable::iconst(int value) { 263 transition(vtos, itos); 264 if (value == 0) { 265 __ xorl(rax, rax); 266 } else { 267 __ movl(rax, value); 268 } 269 } 270 271 void TemplateTable::lconst(int value) { 272 transition(vtos, ltos); 273 if (value == 0) { 274 __ xorl(rax, rax); 275 } else { 276 __ movl(rax, value); 277 } 278 #ifndef _LP64 279 assert(value >= 0, "check this code"); 280 __ xorptr(rdx, rdx); 281 #endif 282 } 283 284 285 286 void TemplateTable::fconst(int value) { 287 transition(vtos, ftos); 288 if (UseSSE >= 1) { 289 static float one = 1.0f, two = 2.0f; 290 switch (value) { 291 case 0: 292 __ xorps(xmm0, xmm0); 293 break; 294 case 1: 295 __ movflt(xmm0, ExternalAddress((address) &one)); 296 break; 297 case 2: 298 __ movflt(xmm0, ExternalAddress((address) &two)); 299 break; 300 default: 301 ShouldNotReachHere(); 302 break; 303 } 304 } else { 305 #ifdef _LP64 306 ShouldNotReachHere(); 307 #else 308 if (value == 0) { __ fldz(); 309 } else if (value == 1) { __ fld1(); 310 } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here 311 } else { ShouldNotReachHere(); 312 } 313 #endif // _LP64 314 } 315 } 316 317 void TemplateTable::dconst(int value) { 318 transition(vtos, dtos); 319 if (UseSSE >= 2) { 320 static double one = 1.0; 321 switch (value) { 322 case 0: 323 __ xorpd(xmm0, xmm0); 324 break; 325 case 1: 326 __ movdbl(xmm0, ExternalAddress((address) &one)); 327 break; 328 default: 329 ShouldNotReachHere(); 330 break; 331 } 332 } else { 333 #ifdef _LP64 334 ShouldNotReachHere(); 335 #else 336 if (value == 0) { __ fldz(); 337 } else if (value == 1) { __ fld1(); 338 } else { ShouldNotReachHere(); 339 } 340 #endif 341 } 342 } 343 344 void TemplateTable::bipush() { 345 transition(vtos, itos); 346 __ load_signed_byte(rax, at_bcp(1)); 347 } 348 349 void TemplateTable::sipush() { 350 transition(vtos, itos); 351 __ load_unsigned_short(rax, at_bcp(1)); 352 __ bswapl(rax); 353 __ sarl(rax, 16); 354 } 355 356 void TemplateTable::ldc(bool wide) { 357 transition(vtos, vtos); 358 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1); 359 Label call_ldc, notFloat, notClass, notInt, Done; 360 361 if (wide) { 362 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); 363 } else { 364 __ load_unsigned_byte(rbx, at_bcp(1)); 365 } 366 367 __ get_cpool_and_tags(rcx, rax); 368 const int base_offset = ConstantPool::header_size() * wordSize; 369 const int tags_offset = Array<u1>::base_offset_in_bytes(); 370 371 // get type 372 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset)); 373 374 // unresolved class - get the resolved class 375 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass); 376 __ jccb(Assembler::equal, call_ldc); 377 378 // unresolved class in error state - call into runtime to throw the error 379 // from the first resolution attempt 380 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError); 381 __ jccb(Assembler::equal, call_ldc); 382 383 // resolved class - need to call vm to get java mirror of the class 384 __ cmpl(rdx, JVM_CONSTANT_Class); 385 __ jcc(Assembler::notEqual, notClass); 386 387 __ bind(call_ldc); 388 389 __ movl(rarg, wide); 390 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg); 391 392 __ push(atos); 393 __ jmp(Done); 394 395 __ bind(notClass); 396 __ cmpl(rdx, JVM_CONSTANT_Float); 397 __ jccb(Assembler::notEqual, notFloat); 398 399 // ftos 400 __ load_float(Address(rcx, rbx, Address::times_ptr, base_offset)); 401 __ push(ftos); 402 __ jmp(Done); 403 404 __ bind(notFloat); 405 __ cmpl(rdx, JVM_CONSTANT_Integer); 406 __ jccb(Assembler::notEqual, notInt); 407 408 // itos 409 __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset)); 410 __ push(itos); 411 __ jmp(Done); 412 413 // assume the tag is for condy; if not, the VM runtime will tell us 414 __ bind(notInt); 415 condy_helper(Done); 416 417 __ bind(Done); 418 } 419 420 // Fast path for caching oop constants. 421 void TemplateTable::fast_aldc(bool wide) { 422 transition(vtos, atos); 423 424 Register result = rax; 425 Register tmp = rdx; 426 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1); 427 int index_size = wide ? sizeof(u2) : sizeof(u1); 428 429 Label resolved; 430 431 // We are resolved if the resolved reference cache entry contains a 432 // non-null object (String, MethodType, etc.) 433 assert_different_registers(result, tmp); 434 __ get_cache_index_at_bcp(tmp, 1, index_size); 435 __ load_resolved_reference_at_index(result, tmp); 436 __ testptr(result, result); 437 __ jcc(Assembler::notZero, resolved); 438 439 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); 440 441 // first time invocation - must resolve first 442 __ movl(rarg, (int)bytecode()); 443 __ call_VM(result, entry, rarg); 444 __ bind(resolved); 445 446 { // Check for the null sentinel. 447 // If we just called the VM, it already did the mapping for us, 448 // but it's harmless to retry. 449 Label notNull; 450 ExternalAddress null_sentinel((address)Universe::the_null_sentinel_addr()); 451 __ movptr(tmp, null_sentinel); 452 __ cmpptr(tmp, result); 453 __ jccb(Assembler::notEqual, notNull); 454 __ xorptr(result, result); // NULL object reference 455 __ bind(notNull); 456 } 457 458 if (VerifyOops) { 459 __ verify_oop(result); 460 } 461 } 462 463 void TemplateTable::ldc2_w() { 464 transition(vtos, vtos); 465 Label notDouble, notLong, Done; 466 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); 467 468 __ get_cpool_and_tags(rcx, rax); 469 const int base_offset = ConstantPool::header_size() * wordSize; 470 const int tags_offset = Array<u1>::base_offset_in_bytes(); 471 472 // get type 473 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset)); 474 __ cmpl(rdx, JVM_CONSTANT_Double); 475 __ jccb(Assembler::notEqual, notDouble); 476 477 // dtos 478 __ load_double(Address(rcx, rbx, Address::times_ptr, base_offset)); 479 __ push(dtos); 480 481 __ jmp(Done); 482 __ bind(notDouble); 483 __ cmpl(rdx, JVM_CONSTANT_Long); 484 __ jccb(Assembler::notEqual, notLong); 485 486 // ltos 487 __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize)); 488 NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize))); 489 __ push(ltos); 490 __ jmp(Done); 491 492 __ bind(notLong); 493 condy_helper(Done); 494 495 __ bind(Done); 496 } 497 498 void TemplateTable::condy_helper(Label& Done) { 499 const Register obj = rax; 500 const Register off = rbx; 501 const Register flags = rcx; 502 const Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1); 503 __ movl(rarg, (int)bytecode()); 504 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc), rarg); 505 #ifndef _LP64 506 // borrow rdi from locals 507 __ get_thread(rdi); 508 __ get_vm_result_2(flags, rdi); 509 __ restore_locals(); 510 #else 511 __ get_vm_result_2(flags, r15_thread); 512 #endif 513 // VMr = obj = base address to find primitive value to push 514 // VMr2 = flags = (tos, off) using format of CPCE::_flags 515 __ movl(off, flags); 516 __ andl(off, ConstantPoolCacheEntry::field_index_mask); 517 const Address field(obj, off, Address::times_1, 0*wordSize); 518 519 // What sort of thing are we loading? 520 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 521 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 522 523 switch (bytecode()) { 524 case Bytecodes::_ldc: 525 case Bytecodes::_ldc_w: 526 { 527 // tos in (itos, ftos, stos, btos, ctos, ztos) 528 Label notInt, notFloat, notShort, notByte, notChar, notBool; 529 __ cmpl(flags, itos); 530 __ jcc(Assembler::notEqual, notInt); 531 // itos 532 __ movl(rax, field); 533 __ push(itos); 534 __ jmp(Done); 535 536 __ bind(notInt); 537 __ cmpl(flags, ftos); 538 __ jcc(Assembler::notEqual, notFloat); 539 // ftos 540 __ load_float(field); 541 __ push(ftos); 542 __ jmp(Done); 543 544 __ bind(notFloat); 545 __ cmpl(flags, stos); 546 __ jcc(Assembler::notEqual, notShort); 547 // stos 548 __ load_signed_short(rax, field); 549 __ push(stos); 550 __ jmp(Done); 551 552 __ bind(notShort); 553 __ cmpl(flags, btos); 554 __ jcc(Assembler::notEqual, notByte); 555 // btos 556 __ load_signed_byte(rax, field); 557 __ push(btos); 558 __ jmp(Done); 559 560 __ bind(notByte); 561 __ cmpl(flags, ctos); 562 __ jcc(Assembler::notEqual, notChar); 563 // ctos 564 __ load_unsigned_short(rax, field); 565 __ push(ctos); 566 __ jmp(Done); 567 568 __ bind(notChar); 569 __ cmpl(flags, ztos); 570 __ jcc(Assembler::notEqual, notBool); 571 // ztos 572 __ load_signed_byte(rax, field); 573 __ push(ztos); 574 __ jmp(Done); 575 576 __ bind(notBool); 577 break; 578 } 579 580 case Bytecodes::_ldc2_w: 581 { 582 Label notLong, notDouble; 583 __ cmpl(flags, ltos); 584 __ jcc(Assembler::notEqual, notLong); 585 // ltos 586 __ movptr(rax, field); 587 NOT_LP64(__ movptr(rdx, field.plus_disp(4))); 588 __ push(ltos); 589 __ jmp(Done); 590 591 __ bind(notLong); 592 __ cmpl(flags, dtos); 593 __ jcc(Assembler::notEqual, notDouble); 594 // dtos 595 __ load_double(field); 596 __ push(dtos); 597 __ jmp(Done); 598 599 __ bind(notDouble); 600 break; 601 } 602 603 default: 604 ShouldNotReachHere(); 605 } 606 607 __ stop("bad ldc/condy"); 608 } 609 610 void TemplateTable::locals_index(Register reg, int offset) { 611 __ load_unsigned_byte(reg, at_bcp(offset)); 612 __ negptr(reg); 613 } 614 615 void TemplateTable::iload() { 616 iload_internal(); 617 } 618 619 void TemplateTable::nofast_iload() { 620 iload_internal(may_not_rewrite); 621 } 622 623 void TemplateTable::iload_internal(RewriteControl rc) { 624 transition(vtos, itos); 625 if (RewriteFrequentPairs && rc == may_rewrite) { 626 Label rewrite, done; 627 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 628 LP64_ONLY(assert(rbx != bc, "register damaged")); 629 630 // get next byte 631 __ load_unsigned_byte(rbx, 632 at_bcp(Bytecodes::length_for(Bytecodes::_iload))); 633 // if _iload, wait to rewrite to iload2. We only want to rewrite the 634 // last two iloads in a pair. Comparing against fast_iload means that 635 // the next bytecode is neither an iload or a caload, and therefore 636 // an iload pair. 637 __ cmpl(rbx, Bytecodes::_iload); 638 __ jcc(Assembler::equal, done); 639 640 __ cmpl(rbx, Bytecodes::_fast_iload); 641 __ movl(bc, Bytecodes::_fast_iload2); 642 643 __ jccb(Assembler::equal, rewrite); 644 645 // if _caload, rewrite to fast_icaload 646 __ cmpl(rbx, Bytecodes::_caload); 647 __ movl(bc, Bytecodes::_fast_icaload); 648 __ jccb(Assembler::equal, rewrite); 649 650 // rewrite so iload doesn't check again. 651 __ movl(bc, Bytecodes::_fast_iload); 652 653 // rewrite 654 // bc: fast bytecode 655 __ bind(rewrite); 656 patch_bytecode(Bytecodes::_iload, bc, rbx, false); 657 __ bind(done); 658 } 659 660 // Get the local value into tos 661 locals_index(rbx); 662 __ movl(rax, iaddress(rbx)); 663 } 664 665 void TemplateTable::fast_iload2() { 666 transition(vtos, itos); 667 locals_index(rbx); 668 __ movl(rax, iaddress(rbx)); 669 __ push(itos); 670 locals_index(rbx, 3); 671 __ movl(rax, iaddress(rbx)); 672 } 673 674 void TemplateTable::fast_iload() { 675 transition(vtos, itos); 676 locals_index(rbx); 677 __ movl(rax, iaddress(rbx)); 678 } 679 680 void TemplateTable::lload() { 681 transition(vtos, ltos); 682 locals_index(rbx); 683 __ movptr(rax, laddress(rbx)); 684 NOT_LP64(__ movl(rdx, haddress(rbx))); 685 } 686 687 void TemplateTable::fload() { 688 transition(vtos, ftos); 689 locals_index(rbx); 690 __ load_float(faddress(rbx)); 691 } 692 693 void TemplateTable::dload() { 694 transition(vtos, dtos); 695 locals_index(rbx); 696 __ load_double(daddress(rbx)); 697 } 698 699 void TemplateTable::aload() { 700 transition(vtos, atos); 701 locals_index(rbx); 702 __ movptr(rax, aaddress(rbx)); 703 } 704 705 void TemplateTable::locals_index_wide(Register reg) { 706 __ load_unsigned_short(reg, at_bcp(2)); 707 __ bswapl(reg); 708 __ shrl(reg, 16); 709 __ negptr(reg); 710 } 711 712 void TemplateTable::wide_iload() { 713 transition(vtos, itos); 714 locals_index_wide(rbx); 715 __ movl(rax, iaddress(rbx)); 716 } 717 718 void TemplateTable::wide_lload() { 719 transition(vtos, ltos); 720 locals_index_wide(rbx); 721 __ movptr(rax, laddress(rbx)); 722 NOT_LP64(__ movl(rdx, haddress(rbx))); 723 } 724 725 void TemplateTable::wide_fload() { 726 transition(vtos, ftos); 727 locals_index_wide(rbx); 728 __ load_float(faddress(rbx)); 729 } 730 731 void TemplateTable::wide_dload() { 732 transition(vtos, dtos); 733 locals_index_wide(rbx); 734 __ load_double(daddress(rbx)); 735 } 736 737 void TemplateTable::wide_aload() { 738 transition(vtos, atos); 739 locals_index_wide(rbx); 740 __ movptr(rax, aaddress(rbx)); 741 } 742 743 void TemplateTable::index_check(Register array, Register index) { 744 // Pop ptr into array 745 __ pop_ptr(array); 746 index_check_without_pop(array, index); 747 } 748 749 void TemplateTable::index_check_without_pop(Register array, Register index) { 750 // destroys rbx 751 // check array 752 __ null_check(array, arrayOopDesc::length_offset_in_bytes()); 753 // sign extend index for use by indexed load 754 __ movl2ptr(index, index); 755 // check index 756 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes())); 757 if (index != rbx) { 758 // ??? convention: move aberrant index into rbx for exception message 759 assert(rbx != array, "different registers"); 760 __ movl(rbx, index); 761 } 762 Label skip; 763 __ jccb(Assembler::below, skip); 764 // Pass array to create more detailed exceptions. 765 __ mov(NOT_LP64(rax) LP64_ONLY(c_rarg1), array); 766 __ jump(ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry)); 767 __ bind(skip); 768 } 769 770 void TemplateTable::iaload() { 771 transition(itos, itos); 772 // rax: index 773 // rdx: array 774 index_check(rdx, rax); // kills rbx 775 __ movl(rax, Address(rdx, rax, 776 Address::times_4, 777 arrayOopDesc::base_offset_in_bytes(T_INT))); 778 } 779 780 void TemplateTable::laload() { 781 transition(itos, ltos); 782 // rax: index 783 // rdx: array 784 index_check(rdx, rax); // kills rbx 785 NOT_LP64(__ mov(rbx, rax)); 786 // rbx,: index 787 __ movptr(rax, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize)); 788 NOT_LP64(__ movl(rdx, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize))); 789 } 790 791 792 793 void TemplateTable::faload() { 794 transition(itos, ftos); 795 // rax: index 796 // rdx: array 797 index_check(rdx, rax); // kills rbx 798 __ load_float(Address(rdx, rax, 799 Address::times_4, 800 arrayOopDesc::base_offset_in_bytes(T_FLOAT))); 801 } 802 803 void TemplateTable::daload() { 804 transition(itos, dtos); 805 // rax: index 806 // rdx: array 807 index_check(rdx, rax); // kills rbx 808 __ load_double(Address(rdx, rax, 809 Address::times_8, 810 arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); 811 } 812 813 void TemplateTable::aaload() { 814 transition(itos, atos); 815 816 Register array = rcx; 817 Register index = rax; 818 819 index_check(array, index); // kills rbx 820 if (ValueArrayFlatten) { 821 Label is_flat_array, done; 822 __ test_flat_array_oop(array, rbx, is_flat_array); 823 do_oop_load(_masm, 824 Address(array, index, 825 UseCompressedOops ? Address::times_4 : Address::times_ptr, 826 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), 827 rax, 828 IN_HEAP_ARRAY); 829 __ jmp(done); 830 __ bind(is_flat_array); 831 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load), array, index); 832 __ bind(done); 833 } else { 834 do_oop_load(_masm, 835 Address(array, index, 836 UseCompressedOops ? Address::times_4 : Address::times_ptr, 837 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), 838 rax, 839 IN_HEAP_ARRAY); 840 } 841 } 842 843 void TemplateTable::baload() { 844 transition(itos, itos); 845 // rax: index 846 // rdx: array 847 index_check(rdx, rax); // kills rbx 848 __ load_signed_byte(rax, Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE))); 849 } 850 851 void TemplateTable::caload() { 852 transition(itos, itos); 853 // rax: index 854 // rdx: array 855 index_check(rdx, rax); // kills rbx 856 __ load_unsigned_short(rax, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 857 } 858 859 // iload followed by caload frequent pair 860 void TemplateTable::fast_icaload() { 861 transition(vtos, itos); 862 // load index out of locals 863 locals_index(rbx); 864 __ movl(rax, iaddress(rbx)); 865 866 // rax: index 867 // rdx: array 868 index_check(rdx, rax); // kills rbx 869 __ load_unsigned_short(rax, 870 Address(rdx, rax, 871 Address::times_2, 872 arrayOopDesc::base_offset_in_bytes(T_CHAR))); 873 } 874 875 876 void TemplateTable::saload() { 877 transition(itos, itos); 878 // rax: index 879 // rdx: array 880 index_check(rdx, rax); // kills rbx 881 __ load_signed_short(rax, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT))); 882 } 883 884 void TemplateTable::iload(int n) { 885 transition(vtos, itos); 886 __ movl(rax, iaddress(n)); 887 } 888 889 void TemplateTable::lload(int n) { 890 transition(vtos, ltos); 891 __ movptr(rax, laddress(n)); 892 NOT_LP64(__ movptr(rdx, haddress(n))); 893 } 894 895 void TemplateTable::fload(int n) { 896 transition(vtos, ftos); 897 __ load_float(faddress(n)); 898 } 899 900 void TemplateTable::dload(int n) { 901 transition(vtos, dtos); 902 __ load_double(daddress(n)); 903 } 904 905 void TemplateTable::aload(int n) { 906 transition(vtos, atos); 907 __ movptr(rax, aaddress(n)); 908 } 909 910 void TemplateTable::aload_0() { 911 aload_0_internal(); 912 } 913 914 void TemplateTable::nofast_aload_0() { 915 aload_0_internal(may_not_rewrite); 916 } 917 918 void TemplateTable::aload_0_internal(RewriteControl rc) { 919 transition(vtos, atos); 920 // According to bytecode histograms, the pairs: 921 // 922 // _aload_0, _fast_igetfield 923 // _aload_0, _fast_agetfield 924 // _aload_0, _fast_fgetfield 925 // 926 // occur frequently. If RewriteFrequentPairs is set, the (slow) 927 // _aload_0 bytecode checks if the next bytecode is either 928 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then 929 // rewrites the current bytecode into a pair bytecode; otherwise it 930 // rewrites the current bytecode into _fast_aload_0 that doesn't do 931 // the pair check anymore. 932 // 933 // Note: If the next bytecode is _getfield, the rewrite must be 934 // delayed, otherwise we may miss an opportunity for a pair. 935 // 936 // Also rewrite frequent pairs 937 // aload_0, aload_1 938 // aload_0, iload_1 939 // These bytecodes with a small amount of code are most profitable 940 // to rewrite 941 if (RewriteFrequentPairs && rc == may_rewrite) { 942 Label rewrite, done; 943 944 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 945 LP64_ONLY(assert(rbx != bc, "register damaged")); 946 947 // get next byte 948 __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0))); 949 950 // if _getfield then wait with rewrite 951 __ cmpl(rbx, Bytecodes::_getfield); 952 __ jcc(Assembler::equal, done); 953 954 // if _igetfield then rewrite to _fast_iaccess_0 955 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 956 __ cmpl(rbx, Bytecodes::_fast_igetfield); 957 __ movl(bc, Bytecodes::_fast_iaccess_0); 958 __ jccb(Assembler::equal, rewrite); 959 960 // if _agetfield then rewrite to _fast_aaccess_0 961 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 962 assert(ValueTypesBufferMaxMemory == 0, "Such rewritting doesn't support flattened values yet"); 963 __ cmpl(rbx, Bytecodes::_fast_agetfield); 964 __ movl(bc, Bytecodes::_fast_aaccess_0); 965 __ jccb(Assembler::equal, rewrite); 966 967 // if _fgetfield then rewrite to _fast_faccess_0 968 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 969 __ cmpl(rbx, Bytecodes::_fast_fgetfield); 970 __ movl(bc, Bytecodes::_fast_faccess_0); 971 __ jccb(Assembler::equal, rewrite); 972 973 // else rewrite to _fast_aload0 974 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition"); 975 __ movl(bc, Bytecodes::_fast_aload_0); 976 977 // rewrite 978 // bc: fast bytecode 979 __ bind(rewrite); 980 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false); 981 982 __ bind(done); 983 } 984 985 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop). 986 aload(0); 987 } 988 989 void TemplateTable::istore() { 990 transition(itos, vtos); 991 locals_index(rbx); 992 __ movl(iaddress(rbx), rax); 993 } 994 995 996 void TemplateTable::lstore() { 997 transition(ltos, vtos); 998 locals_index(rbx); 999 __ movptr(laddress(rbx), rax); 1000 NOT_LP64(__ movptr(haddress(rbx), rdx)); 1001 } 1002 1003 void TemplateTable::fstore() { 1004 transition(ftos, vtos); 1005 locals_index(rbx); 1006 __ store_float(faddress(rbx)); 1007 } 1008 1009 void TemplateTable::dstore() { 1010 transition(dtos, vtos); 1011 locals_index(rbx); 1012 __ store_double(daddress(rbx)); 1013 } 1014 1015 void TemplateTable::astore() { 1016 transition(vtos, vtos); 1017 __ pop_ptr(rax); 1018 locals_index(rbx); 1019 __ movptr(aaddress(rbx), rax); 1020 } 1021 1022 void TemplateTable::wide_istore() { 1023 transition(vtos, vtos); 1024 __ pop_i(); 1025 locals_index_wide(rbx); 1026 __ movl(iaddress(rbx), rax); 1027 } 1028 1029 void TemplateTable::wide_lstore() { 1030 transition(vtos, vtos); 1031 NOT_LP64(__ pop_l(rax, rdx)); 1032 LP64_ONLY(__ pop_l()); 1033 locals_index_wide(rbx); 1034 __ movptr(laddress(rbx), rax); 1035 NOT_LP64(__ movl(haddress(rbx), rdx)); 1036 } 1037 1038 void TemplateTable::wide_fstore() { 1039 #ifdef _LP64 1040 transition(vtos, vtos); 1041 __ pop_f(xmm0); 1042 locals_index_wide(rbx); 1043 __ movflt(faddress(rbx), xmm0); 1044 #else 1045 wide_istore(); 1046 #endif 1047 } 1048 1049 void TemplateTable::wide_dstore() { 1050 #ifdef _LP64 1051 transition(vtos, vtos); 1052 __ pop_d(xmm0); 1053 locals_index_wide(rbx); 1054 __ movdbl(daddress(rbx), xmm0); 1055 #else 1056 wide_lstore(); 1057 #endif 1058 } 1059 1060 void TemplateTable::wide_astore() { 1061 transition(vtos, vtos); 1062 __ pop_ptr(rax); 1063 locals_index_wide(rbx); 1064 __ movptr(aaddress(rbx), rax); 1065 } 1066 1067 void TemplateTable::iastore() { 1068 transition(itos, vtos); 1069 __ pop_i(rbx); 1070 // rax: value 1071 // rbx: index 1072 // rdx: array 1073 index_check(rdx, rbx); // prefer index in rbx 1074 __ movl(Address(rdx, rbx, 1075 Address::times_4, 1076 arrayOopDesc::base_offset_in_bytes(T_INT)), 1077 rax); 1078 } 1079 1080 void TemplateTable::lastore() { 1081 transition(ltos, vtos); 1082 __ pop_i(rbx); 1083 // rax,: low(value) 1084 // rcx: array 1085 // rdx: high(value) 1086 index_check(rcx, rbx); // prefer index in rbx, 1087 // rbx,: index 1088 __ movptr(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize), rax); 1089 NOT_LP64(__ movl(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize), rdx)); 1090 } 1091 1092 1093 void TemplateTable::fastore() { 1094 transition(ftos, vtos); 1095 __ pop_i(rbx); 1096 // value is in UseSSE >= 1 ? xmm0 : ST(0) 1097 // rbx: index 1098 // rdx: array 1099 index_check(rdx, rbx); // prefer index in rbx 1100 __ store_float(Address(rdx, rbx, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_FLOAT))); 1101 } 1102 1103 void TemplateTable::dastore() { 1104 transition(dtos, vtos); 1105 __ pop_i(rbx); 1106 // value is in UseSSE >= 2 ? xmm0 : ST(0) 1107 // rbx: index 1108 // rdx: array 1109 index_check(rdx, rbx); // prefer index in rbx 1110 __ store_double(Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); 1111 } 1112 1113 void TemplateTable::aastore() { 1114 Label is_null, is_flat_array, ok_is_subtype, done; 1115 transition(vtos, vtos); 1116 // stack: ..., array, index, value 1117 __ movptr(rax, at_tos()); // value 1118 __ movl(rcx, at_tos_p1()); // index 1119 __ movptr(rdx, at_tos_p2()); // array 1120 1121 Address element_address(rdx, rcx, 1122 UseCompressedOops? Address::times_4 : Address::times_ptr, 1123 arrayOopDesc::base_offset_in_bytes(T_OBJECT)); 1124 1125 index_check_without_pop(rdx, rcx); // kills rbx 1126 1127 __ testptr(rax, rax); 1128 __ jcc(Assembler::zero, is_null); 1129 1130 // Move array class to rdi 1131 __ load_klass(rdi, rdx); 1132 if (ValueArrayFlatten) { 1133 __ test_flat_array_klass(rdi, rbx, is_flat_array); 1134 } 1135 1136 // Move subklass into rbx 1137 __ load_klass(rbx, rax); 1138 // Move array element superklass into rax 1139 __ movptr(rax, Address(rdi, 1140 ObjArrayKlass::element_klass_offset())); 1141 1142 // Generate subtype check. Blows rcx, rdi 1143 // Superklass in rax. Subklass in rbx. 1144 // is "rbx <: rax" ? (value subclass <: array element superclass) 1145 __ gen_subtype_check(rbx, ok_is_subtype); 1146 1147 // Come here on failure 1148 // object is at TOS 1149 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry)); 1150 1151 // Come here on success 1152 __ bind(ok_is_subtype); 1153 1154 // Get the value we will store 1155 __ movptr(rax, at_tos()); 1156 if (ValueTypesBufferMaxMemory > 0) { 1157 Label is_on_heap; 1158 __ test_value_is_not_buffered(rax, rbx, is_on_heap); 1159 __ push(rdx); // save precomputed element address, and convert buffer oop to heap oop 1160 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_heap_copy), rax); 1161 __ pop(rdx); 1162 __ bind(is_on_heap); 1163 } 1164 __ movl(rcx, at_tos_p1()); // index 1165 // Now store using the appropriate barrier 1166 do_oop_store(_masm, element_address, rax, IN_HEAP_ARRAY); 1167 __ jmp(done); 1168 1169 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx] 1170 __ bind(is_null); 1171 __ profile_null_seen(rbx); 1172 if (EnableValhalla) { 1173 Label is_null_into_value_array_npe, store_null; 1174 1175 __ load_klass(rdi, rdx); 1176 // No way to store null in flat array 1177 __ test_flat_array_klass(rdi, rbx, is_null_into_value_array_npe); 1178 1179 // Use case for storing values in objArray where element_klass is specifically 1180 // a value type because they could not be flattened "for reasons", 1181 // these need to have the same semantics as flat arrays, i.e. NPE 1182 __ movptr(rdi, Address(rdi, ObjArrayKlass::element_klass_offset())); 1183 __ test_klass_is_value(rdi, rdi, is_null_into_value_array_npe); 1184 __ jmp(store_null); 1185 1186 __ bind(is_null_into_value_array_npe); 1187 __ jump(ExternalAddress(Interpreter::_throw_NullPointerException_entry)); 1188 1189 __ bind(store_null); 1190 } 1191 // Store a NULL 1192 do_oop_store(_masm, element_address, noreg, IN_HEAP_ARRAY); 1193 __ jmp(done); 1194 1195 if (EnableValhalla) { 1196 Label is_type_ok; 1197 __ bind(is_flat_array); // Store non-null value to flat 1198 1199 // Simplistic type check... 1200 1201 // Profile the not-null value's klass. 1202 __ load_klass(rbx, rax); 1203 __ profile_typecheck(rcx, rbx, rax); // blows rcx, and rax 1204 // Move element klass into rax 1205 __ movptr(rax, Address(rdi, ArrayKlass::element_klass_offset())); 1206 // flat value array needs exact type match 1207 // is "rax == rbx" (value subclass == array element superclass) 1208 __ cmpptr(rax, rbx); 1209 __ jccb(Assembler::equal, is_type_ok); 1210 1211 __ profile_typecheck_failed(rcx); 1212 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry)); 1213 1214 __ bind(is_type_ok); 1215 __ movptr(rax, at_tos()); // value 1216 __ movl(rcx, at_tos_p1()); // index 1217 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_store), rax, rdx, rcx); 1218 } 1219 // Pop stack arguments 1220 __ bind(done); 1221 __ addptr(rsp, 3 * Interpreter::stackElementSize); 1222 } 1223 1224 void TemplateTable::bastore() { 1225 transition(itos, vtos); 1226 __ pop_i(rbx); 1227 // rax: value 1228 // rbx: index 1229 // rdx: array 1230 index_check(rdx, rbx); // prefer index in rbx 1231 // Need to check whether array is boolean or byte 1232 // since both types share the bastore bytecode. 1233 __ load_klass(rcx, rdx); 1234 __ movl(rcx, Address(rcx, Klass::layout_helper_offset())); 1235 int diffbit = Klass::layout_helper_boolean_diffbit(); 1236 __ testl(rcx, diffbit); 1237 Label L_skip; 1238 __ jccb(Assembler::zero, L_skip); 1239 __ andl(rax, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1 1240 __ bind(L_skip); 1241 __ movb(Address(rdx, rbx, 1242 Address::times_1, 1243 arrayOopDesc::base_offset_in_bytes(T_BYTE)), 1244 rax); 1245 } 1246 1247 void TemplateTable::castore() { 1248 transition(itos, vtos); 1249 __ pop_i(rbx); 1250 // rax: value 1251 // rbx: index 1252 // rdx: array 1253 index_check(rdx, rbx); // prefer index in rbx 1254 __ movw(Address(rdx, rbx, 1255 Address::times_2, 1256 arrayOopDesc::base_offset_in_bytes(T_CHAR)), 1257 rax); 1258 } 1259 1260 1261 void TemplateTable::sastore() { 1262 castore(); 1263 } 1264 1265 void TemplateTable::istore(int n) { 1266 transition(itos, vtos); 1267 __ movl(iaddress(n), rax); 1268 } 1269 1270 void TemplateTable::lstore(int n) { 1271 transition(ltos, vtos); 1272 __ movptr(laddress(n), rax); 1273 NOT_LP64(__ movptr(haddress(n), rdx)); 1274 } 1275 1276 void TemplateTable::fstore(int n) { 1277 transition(ftos, vtos); 1278 __ store_float(faddress(n)); 1279 } 1280 1281 void TemplateTable::dstore(int n) { 1282 transition(dtos, vtos); 1283 __ store_double(daddress(n)); 1284 } 1285 1286 1287 void TemplateTable::astore(int n) { 1288 transition(vtos, vtos); 1289 __ pop_ptr(rax); 1290 __ movptr(aaddress(n), rax); 1291 } 1292 1293 void TemplateTable::pop() { 1294 transition(vtos, vtos); 1295 __ addptr(rsp, Interpreter::stackElementSize); 1296 } 1297 1298 void TemplateTable::pop2() { 1299 transition(vtos, vtos); 1300 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1301 } 1302 1303 1304 void TemplateTable::dup() { 1305 transition(vtos, vtos); 1306 __ load_ptr(0, rax); 1307 __ push_ptr(rax); 1308 // stack: ..., a, a 1309 } 1310 1311 void TemplateTable::dup_x1() { 1312 transition(vtos, vtos); 1313 // stack: ..., a, b 1314 __ load_ptr( 0, rax); // load b 1315 __ load_ptr( 1, rcx); // load a 1316 __ store_ptr(1, rax); // store b 1317 __ store_ptr(0, rcx); // store a 1318 __ push_ptr(rax); // push b 1319 // stack: ..., b, a, b 1320 } 1321 1322 void TemplateTable::dup_x2() { 1323 transition(vtos, vtos); 1324 // stack: ..., a, b, c 1325 __ load_ptr( 0, rax); // load c 1326 __ load_ptr( 2, rcx); // load a 1327 __ store_ptr(2, rax); // store c in a 1328 __ push_ptr(rax); // push c 1329 // stack: ..., c, b, c, c 1330 __ load_ptr( 2, rax); // load b 1331 __ store_ptr(2, rcx); // store a in b 1332 // stack: ..., c, a, c, c 1333 __ store_ptr(1, rax); // store b in c 1334 // stack: ..., c, a, b, c 1335 } 1336 1337 void TemplateTable::dup2() { 1338 transition(vtos, vtos); 1339 // stack: ..., a, b 1340 __ load_ptr(1, rax); // load a 1341 __ push_ptr(rax); // push a 1342 __ load_ptr(1, rax); // load b 1343 __ push_ptr(rax); // push b 1344 // stack: ..., a, b, a, b 1345 } 1346 1347 1348 void TemplateTable::dup2_x1() { 1349 transition(vtos, vtos); 1350 // stack: ..., a, b, c 1351 __ load_ptr( 0, rcx); // load c 1352 __ load_ptr( 1, rax); // load b 1353 __ push_ptr(rax); // push b 1354 __ push_ptr(rcx); // push c 1355 // stack: ..., a, b, c, b, c 1356 __ store_ptr(3, rcx); // store c in b 1357 // stack: ..., a, c, c, b, c 1358 __ load_ptr( 4, rcx); // load a 1359 __ store_ptr(2, rcx); // store a in 2nd c 1360 // stack: ..., a, c, a, b, c 1361 __ store_ptr(4, rax); // store b in a 1362 // stack: ..., b, c, a, b, c 1363 } 1364 1365 void TemplateTable::dup2_x2() { 1366 transition(vtos, vtos); 1367 // stack: ..., a, b, c, d 1368 __ load_ptr( 0, rcx); // load d 1369 __ load_ptr( 1, rax); // load c 1370 __ push_ptr(rax); // push c 1371 __ push_ptr(rcx); // push d 1372 // stack: ..., a, b, c, d, c, d 1373 __ load_ptr( 4, rax); // load b 1374 __ store_ptr(2, rax); // store b in d 1375 __ store_ptr(4, rcx); // store d in b 1376 // stack: ..., a, d, c, b, c, d 1377 __ load_ptr( 5, rcx); // load a 1378 __ load_ptr( 3, rax); // load c 1379 __ store_ptr(3, rcx); // store a in c 1380 __ store_ptr(5, rax); // store c in a 1381 // stack: ..., c, d, a, b, c, d 1382 } 1383 1384 void TemplateTable::swap() { 1385 transition(vtos, vtos); 1386 // stack: ..., a, b 1387 __ load_ptr( 1, rcx); // load a 1388 __ load_ptr( 0, rax); // load b 1389 __ store_ptr(0, rcx); // store a in b 1390 __ store_ptr(1, rax); // store b in a 1391 // stack: ..., b, a 1392 } 1393 1394 void TemplateTable::iop2(Operation op) { 1395 transition(itos, itos); 1396 switch (op) { 1397 case add : __ pop_i(rdx); __ addl (rax, rdx); break; 1398 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break; 1399 case mul : __ pop_i(rdx); __ imull(rax, rdx); break; 1400 case _and : __ pop_i(rdx); __ andl (rax, rdx); break; 1401 case _or : __ pop_i(rdx); __ orl (rax, rdx); break; 1402 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break; 1403 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break; 1404 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break; 1405 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break; 1406 default : ShouldNotReachHere(); 1407 } 1408 } 1409 1410 void TemplateTable::lop2(Operation op) { 1411 transition(ltos, ltos); 1412 #ifdef _LP64 1413 switch (op) { 1414 case add : __ pop_l(rdx); __ addptr(rax, rdx); break; 1415 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break; 1416 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break; 1417 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break; 1418 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break; 1419 default : ShouldNotReachHere(); 1420 } 1421 #else 1422 __ pop_l(rbx, rcx); 1423 switch (op) { 1424 case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break; 1425 case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx); 1426 __ mov (rax, rbx); __ mov (rdx, rcx); break; 1427 case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break; 1428 case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break; 1429 case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break; 1430 default : ShouldNotReachHere(); 1431 } 1432 #endif 1433 } 1434 1435 void TemplateTable::idiv() { 1436 transition(itos, itos); 1437 __ movl(rcx, rax); 1438 __ pop_i(rax); 1439 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If 1440 // they are not equal, one could do a normal division (no correction 1441 // needed), which may speed up this implementation for the common case. 1442 // (see also JVM spec., p.243 & p.271) 1443 __ corrected_idivl(rcx); 1444 } 1445 1446 void TemplateTable::irem() { 1447 transition(itos, itos); 1448 __ movl(rcx, rax); 1449 __ pop_i(rax); 1450 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If 1451 // they are not equal, one could do a normal division (no correction 1452 // needed), which may speed up this implementation for the common case. 1453 // (see also JVM spec., p.243 & p.271) 1454 __ corrected_idivl(rcx); 1455 __ movl(rax, rdx); 1456 } 1457 1458 void TemplateTable::lmul() { 1459 transition(ltos, ltos); 1460 #ifdef _LP64 1461 __ pop_l(rdx); 1462 __ imulq(rax, rdx); 1463 #else 1464 __ pop_l(rbx, rcx); 1465 __ push(rcx); __ push(rbx); 1466 __ push(rdx); __ push(rax); 1467 __ lmul(2 * wordSize, 0); 1468 __ addptr(rsp, 4 * wordSize); // take off temporaries 1469 #endif 1470 } 1471 1472 void TemplateTable::ldiv() { 1473 transition(ltos, ltos); 1474 #ifdef _LP64 1475 __ mov(rcx, rax); 1476 __ pop_l(rax); 1477 // generate explicit div0 check 1478 __ testq(rcx, rcx); 1479 __ jump_cc(Assembler::zero, 1480 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1481 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If 1482 // they are not equal, one could do a normal division (no correction 1483 // needed), which may speed up this implementation for the common case. 1484 // (see also JVM spec., p.243 & p.271) 1485 __ corrected_idivq(rcx); // kills rbx 1486 #else 1487 __ pop_l(rbx, rcx); 1488 __ push(rcx); __ push(rbx); 1489 __ push(rdx); __ push(rax); 1490 // check if y = 0 1491 __ orl(rax, rdx); 1492 __ jump_cc(Assembler::zero, 1493 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1494 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv)); 1495 __ addptr(rsp, 4 * wordSize); // take off temporaries 1496 #endif 1497 } 1498 1499 void TemplateTable::lrem() { 1500 transition(ltos, ltos); 1501 #ifdef _LP64 1502 __ mov(rcx, rax); 1503 __ pop_l(rax); 1504 __ testq(rcx, rcx); 1505 __ jump_cc(Assembler::zero, 1506 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1507 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If 1508 // they are not equal, one could do a normal division (no correction 1509 // needed), which may speed up this implementation for the common case. 1510 // (see also JVM spec., p.243 & p.271) 1511 __ corrected_idivq(rcx); // kills rbx 1512 __ mov(rax, rdx); 1513 #else 1514 __ pop_l(rbx, rcx); 1515 __ push(rcx); __ push(rbx); 1516 __ push(rdx); __ push(rax); 1517 // check if y = 0 1518 __ orl(rax, rdx); 1519 __ jump_cc(Assembler::zero, 1520 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1521 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem)); 1522 __ addptr(rsp, 4 * wordSize); 1523 #endif 1524 } 1525 1526 void TemplateTable::lshl() { 1527 transition(itos, ltos); 1528 __ movl(rcx, rax); // get shift count 1529 #ifdef _LP64 1530 __ pop_l(rax); // get shift value 1531 __ shlq(rax); 1532 #else 1533 __ pop_l(rax, rdx); // get shift value 1534 __ lshl(rdx, rax); 1535 #endif 1536 } 1537 1538 void TemplateTable::lshr() { 1539 #ifdef _LP64 1540 transition(itos, ltos); 1541 __ movl(rcx, rax); // get shift count 1542 __ pop_l(rax); // get shift value 1543 __ sarq(rax); 1544 #else 1545 transition(itos, ltos); 1546 __ mov(rcx, rax); // get shift count 1547 __ pop_l(rax, rdx); // get shift value 1548 __ lshr(rdx, rax, true); 1549 #endif 1550 } 1551 1552 void TemplateTable::lushr() { 1553 transition(itos, ltos); 1554 #ifdef _LP64 1555 __ movl(rcx, rax); // get shift count 1556 __ pop_l(rax); // get shift value 1557 __ shrq(rax); 1558 #else 1559 __ mov(rcx, rax); // get shift count 1560 __ pop_l(rax, rdx); // get shift value 1561 __ lshr(rdx, rax); 1562 #endif 1563 } 1564 1565 void TemplateTable::fop2(Operation op) { 1566 transition(ftos, ftos); 1567 1568 if (UseSSE >= 1) { 1569 switch (op) { 1570 case add: 1571 __ addss(xmm0, at_rsp()); 1572 __ addptr(rsp, Interpreter::stackElementSize); 1573 break; 1574 case sub: 1575 __ movflt(xmm1, xmm0); 1576 __ pop_f(xmm0); 1577 __ subss(xmm0, xmm1); 1578 break; 1579 case mul: 1580 __ mulss(xmm0, at_rsp()); 1581 __ addptr(rsp, Interpreter::stackElementSize); 1582 break; 1583 case div: 1584 __ movflt(xmm1, xmm0); 1585 __ pop_f(xmm0); 1586 __ divss(xmm0, xmm1); 1587 break; 1588 case rem: 1589 // On x86_64 platforms the SharedRuntime::frem method is called to perform the 1590 // modulo operation. The frem method calls the function 1591 // double fmod(double x, double y) in math.h. The documentation of fmod states: 1592 // "If x or y is a NaN, a NaN is returned." without specifying what type of NaN 1593 // (signalling or quiet) is returned. 1594 // 1595 // On x86_32 platforms the FPU is used to perform the modulo operation. The 1596 // reason is that on 32-bit Windows the sign of modulo operations diverges from 1597 // what is considered the standard (e.g., -0.0f % -3.14f is 0.0f (and not -0.0f). 1598 // The fprem instruction used on x86_32 is functionally equivalent to 1599 // SharedRuntime::frem in that it returns a NaN. 1600 #ifdef _LP64 1601 __ movflt(xmm1, xmm0); 1602 __ pop_f(xmm0); 1603 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2); 1604 #else 1605 __ push_f(xmm0); 1606 __ pop_f(); 1607 __ fld_s(at_rsp()); 1608 __ fremr(rax); 1609 __ f2ieee(); 1610 __ pop(rax); // pop second operand off the stack 1611 __ push_f(); 1612 __ pop_f(xmm0); 1613 #endif 1614 break; 1615 default: 1616 ShouldNotReachHere(); 1617 break; 1618 } 1619 } else { 1620 #ifdef _LP64 1621 ShouldNotReachHere(); 1622 #else 1623 switch (op) { 1624 case add: __ fadd_s (at_rsp()); break; 1625 case sub: __ fsubr_s(at_rsp()); break; 1626 case mul: __ fmul_s (at_rsp()); break; 1627 case div: __ fdivr_s(at_rsp()); break; 1628 case rem: __ fld_s (at_rsp()); __ fremr(rax); break; 1629 default : ShouldNotReachHere(); 1630 } 1631 __ f2ieee(); 1632 __ pop(rax); // pop second operand off the stack 1633 #endif // _LP64 1634 } 1635 } 1636 1637 void TemplateTable::dop2(Operation op) { 1638 transition(dtos, dtos); 1639 if (UseSSE >= 2) { 1640 switch (op) { 1641 case add: 1642 __ addsd(xmm0, at_rsp()); 1643 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1644 break; 1645 case sub: 1646 __ movdbl(xmm1, xmm0); 1647 __ pop_d(xmm0); 1648 __ subsd(xmm0, xmm1); 1649 break; 1650 case mul: 1651 __ mulsd(xmm0, at_rsp()); 1652 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1653 break; 1654 case div: 1655 __ movdbl(xmm1, xmm0); 1656 __ pop_d(xmm0); 1657 __ divsd(xmm0, xmm1); 1658 break; 1659 case rem: 1660 // Similar to fop2(), the modulo operation is performed using the 1661 // SharedRuntime::drem method (on x86_64 platforms) or using the 1662 // FPU (on x86_32 platforms) for the same reasons as mentioned in fop2(). 1663 #ifdef _LP64 1664 __ movdbl(xmm1, xmm0); 1665 __ pop_d(xmm0); 1666 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2); 1667 #else 1668 __ push_d(xmm0); 1669 __ pop_d(); 1670 __ fld_d(at_rsp()); 1671 __ fremr(rax); 1672 __ d2ieee(); 1673 __ pop(rax); 1674 __ pop(rdx); 1675 __ push_d(); 1676 __ pop_d(xmm0); 1677 #endif 1678 break; 1679 default: 1680 ShouldNotReachHere(); 1681 break; 1682 } 1683 } else { 1684 #ifdef _LP64 1685 ShouldNotReachHere(); 1686 #else 1687 switch (op) { 1688 case add: __ fadd_d (at_rsp()); break; 1689 case sub: __ fsubr_d(at_rsp()); break; 1690 case mul: { 1691 Label L_strict; 1692 Label L_join; 1693 const Address access_flags (rcx, Method::access_flags_offset()); 1694 __ get_method(rcx); 1695 __ movl(rcx, access_flags); 1696 __ testl(rcx, JVM_ACC_STRICT); 1697 __ jccb(Assembler::notZero, L_strict); 1698 __ fmul_d (at_rsp()); 1699 __ jmpb(L_join); 1700 __ bind(L_strict); 1701 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 1702 __ fmulp(); 1703 __ fmul_d (at_rsp()); 1704 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 1705 __ fmulp(); 1706 __ bind(L_join); 1707 break; 1708 } 1709 case div: { 1710 Label L_strict; 1711 Label L_join; 1712 const Address access_flags (rcx, Method::access_flags_offset()); 1713 __ get_method(rcx); 1714 __ movl(rcx, access_flags); 1715 __ testl(rcx, JVM_ACC_STRICT); 1716 __ jccb(Assembler::notZero, L_strict); 1717 __ fdivr_d(at_rsp()); 1718 __ jmp(L_join); 1719 __ bind(L_strict); 1720 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 1721 __ fmul_d (at_rsp()); 1722 __ fdivrp(); 1723 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 1724 __ fmulp(); 1725 __ bind(L_join); 1726 break; 1727 } 1728 case rem: __ fld_d (at_rsp()); __ fremr(rax); break; 1729 default : ShouldNotReachHere(); 1730 } 1731 __ d2ieee(); 1732 // Pop double precision number from rsp. 1733 __ pop(rax); 1734 __ pop(rdx); 1735 #endif 1736 } 1737 } 1738 1739 void TemplateTable::ineg() { 1740 transition(itos, itos); 1741 __ negl(rax); 1742 } 1743 1744 void TemplateTable::lneg() { 1745 transition(ltos, ltos); 1746 LP64_ONLY(__ negq(rax)); 1747 NOT_LP64(__ lneg(rdx, rax)); 1748 } 1749 1750 // Note: 'double' and 'long long' have 32-bits alignment on x86. 1751 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 1752 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 1753 // of 128-bits operands for SSE instructions. 1754 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF))); 1755 // Store the value to a 128-bits operand. 1756 operand[0] = lo; 1757 operand[1] = hi; 1758 return operand; 1759 } 1760 1761 // Buffer for 128-bits masks used by SSE instructions. 1762 static jlong float_signflip_pool[2*2]; 1763 static jlong double_signflip_pool[2*2]; 1764 1765 void TemplateTable::fneg() { 1766 transition(ftos, ftos); 1767 if (UseSSE >= 1) { 1768 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], CONST64(0x8000000080000000), CONST64(0x8000000080000000)); 1769 __ xorps(xmm0, ExternalAddress((address) float_signflip)); 1770 } else { 1771 LP64_ONLY(ShouldNotReachHere()); 1772 NOT_LP64(__ fchs()); 1773 } 1774 } 1775 1776 void TemplateTable::dneg() { 1777 transition(dtos, dtos); 1778 if (UseSSE >= 2) { 1779 static jlong *double_signflip = 1780 double_quadword(&double_signflip_pool[1], CONST64(0x8000000000000000), CONST64(0x8000000000000000)); 1781 __ xorpd(xmm0, ExternalAddress((address) double_signflip)); 1782 } else { 1783 #ifdef _LP64 1784 ShouldNotReachHere(); 1785 #else 1786 __ fchs(); 1787 #endif 1788 } 1789 } 1790 1791 void TemplateTable::iinc() { 1792 transition(vtos, vtos); 1793 __ load_signed_byte(rdx, at_bcp(2)); // get constant 1794 locals_index(rbx); 1795 __ addl(iaddress(rbx), rdx); 1796 } 1797 1798 void TemplateTable::wide_iinc() { 1799 transition(vtos, vtos); 1800 __ movl(rdx, at_bcp(4)); // get constant 1801 locals_index_wide(rbx); 1802 __ bswapl(rdx); // swap bytes & sign-extend constant 1803 __ sarl(rdx, 16); 1804 __ addl(iaddress(rbx), rdx); 1805 // Note: should probably use only one movl to get both 1806 // the index and the constant -> fix this 1807 } 1808 1809 void TemplateTable::convert() { 1810 #ifdef _LP64 1811 // Checking 1812 #ifdef ASSERT 1813 { 1814 TosState tos_in = ilgl; 1815 TosState tos_out = ilgl; 1816 switch (bytecode()) { 1817 case Bytecodes::_i2l: // fall through 1818 case Bytecodes::_i2f: // fall through 1819 case Bytecodes::_i2d: // fall through 1820 case Bytecodes::_i2b: // fall through 1821 case Bytecodes::_i2c: // fall through 1822 case Bytecodes::_i2s: tos_in = itos; break; 1823 case Bytecodes::_l2i: // fall through 1824 case Bytecodes::_l2f: // fall through 1825 case Bytecodes::_l2d: tos_in = ltos; break; 1826 case Bytecodes::_f2i: // fall through 1827 case Bytecodes::_f2l: // fall through 1828 case Bytecodes::_f2d: tos_in = ftos; break; 1829 case Bytecodes::_d2i: // fall through 1830 case Bytecodes::_d2l: // fall through 1831 case Bytecodes::_d2f: tos_in = dtos; break; 1832 default : ShouldNotReachHere(); 1833 } 1834 switch (bytecode()) { 1835 case Bytecodes::_l2i: // fall through 1836 case Bytecodes::_f2i: // fall through 1837 case Bytecodes::_d2i: // fall through 1838 case Bytecodes::_i2b: // fall through 1839 case Bytecodes::_i2c: // fall through 1840 case Bytecodes::_i2s: tos_out = itos; break; 1841 case Bytecodes::_i2l: // fall through 1842 case Bytecodes::_f2l: // fall through 1843 case Bytecodes::_d2l: tos_out = ltos; break; 1844 case Bytecodes::_i2f: // fall through 1845 case Bytecodes::_l2f: // fall through 1846 case Bytecodes::_d2f: tos_out = ftos; break; 1847 case Bytecodes::_i2d: // fall through 1848 case Bytecodes::_l2d: // fall through 1849 case Bytecodes::_f2d: tos_out = dtos; break; 1850 default : ShouldNotReachHere(); 1851 } 1852 transition(tos_in, tos_out); 1853 } 1854 #endif // ASSERT 1855 1856 static const int64_t is_nan = 0x8000000000000000L; 1857 1858 // Conversion 1859 switch (bytecode()) { 1860 case Bytecodes::_i2l: 1861 __ movslq(rax, rax); 1862 break; 1863 case Bytecodes::_i2f: 1864 __ cvtsi2ssl(xmm0, rax); 1865 break; 1866 case Bytecodes::_i2d: 1867 __ cvtsi2sdl(xmm0, rax); 1868 break; 1869 case Bytecodes::_i2b: 1870 __ movsbl(rax, rax); 1871 break; 1872 case Bytecodes::_i2c: 1873 __ movzwl(rax, rax); 1874 break; 1875 case Bytecodes::_i2s: 1876 __ movswl(rax, rax); 1877 break; 1878 case Bytecodes::_l2i: 1879 __ movl(rax, rax); 1880 break; 1881 case Bytecodes::_l2f: 1882 __ cvtsi2ssq(xmm0, rax); 1883 break; 1884 case Bytecodes::_l2d: 1885 __ cvtsi2sdq(xmm0, rax); 1886 break; 1887 case Bytecodes::_f2i: 1888 { 1889 Label L; 1890 __ cvttss2sil(rax, xmm0); 1891 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow? 1892 __ jcc(Assembler::notEqual, L); 1893 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1); 1894 __ bind(L); 1895 } 1896 break; 1897 case Bytecodes::_f2l: 1898 { 1899 Label L; 1900 __ cvttss2siq(rax, xmm0); 1901 // NaN or overflow/underflow? 1902 __ cmp64(rax, ExternalAddress((address) &is_nan)); 1903 __ jcc(Assembler::notEqual, L); 1904 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1); 1905 __ bind(L); 1906 } 1907 break; 1908 case Bytecodes::_f2d: 1909 __ cvtss2sd(xmm0, xmm0); 1910 break; 1911 case Bytecodes::_d2i: 1912 { 1913 Label L; 1914 __ cvttsd2sil(rax, xmm0); 1915 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow? 1916 __ jcc(Assembler::notEqual, L); 1917 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1); 1918 __ bind(L); 1919 } 1920 break; 1921 case Bytecodes::_d2l: 1922 { 1923 Label L; 1924 __ cvttsd2siq(rax, xmm0); 1925 // NaN or overflow/underflow? 1926 __ cmp64(rax, ExternalAddress((address) &is_nan)); 1927 __ jcc(Assembler::notEqual, L); 1928 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1); 1929 __ bind(L); 1930 } 1931 break; 1932 case Bytecodes::_d2f: 1933 __ cvtsd2ss(xmm0, xmm0); 1934 break; 1935 default: 1936 ShouldNotReachHere(); 1937 } 1938 #else 1939 // Checking 1940 #ifdef ASSERT 1941 { TosState tos_in = ilgl; 1942 TosState tos_out = ilgl; 1943 switch (bytecode()) { 1944 case Bytecodes::_i2l: // fall through 1945 case Bytecodes::_i2f: // fall through 1946 case Bytecodes::_i2d: // fall through 1947 case Bytecodes::_i2b: // fall through 1948 case Bytecodes::_i2c: // fall through 1949 case Bytecodes::_i2s: tos_in = itos; break; 1950 case Bytecodes::_l2i: // fall through 1951 case Bytecodes::_l2f: // fall through 1952 case Bytecodes::_l2d: tos_in = ltos; break; 1953 case Bytecodes::_f2i: // fall through 1954 case Bytecodes::_f2l: // fall through 1955 case Bytecodes::_f2d: tos_in = ftos; break; 1956 case Bytecodes::_d2i: // fall through 1957 case Bytecodes::_d2l: // fall through 1958 case Bytecodes::_d2f: tos_in = dtos; break; 1959 default : ShouldNotReachHere(); 1960 } 1961 switch (bytecode()) { 1962 case Bytecodes::_l2i: // fall through 1963 case Bytecodes::_f2i: // fall through 1964 case Bytecodes::_d2i: // fall through 1965 case Bytecodes::_i2b: // fall through 1966 case Bytecodes::_i2c: // fall through 1967 case Bytecodes::_i2s: tos_out = itos; break; 1968 case Bytecodes::_i2l: // fall through 1969 case Bytecodes::_f2l: // fall through 1970 case Bytecodes::_d2l: tos_out = ltos; break; 1971 case Bytecodes::_i2f: // fall through 1972 case Bytecodes::_l2f: // fall through 1973 case Bytecodes::_d2f: tos_out = ftos; break; 1974 case Bytecodes::_i2d: // fall through 1975 case Bytecodes::_l2d: // fall through 1976 case Bytecodes::_f2d: tos_out = dtos; break; 1977 default : ShouldNotReachHere(); 1978 } 1979 transition(tos_in, tos_out); 1980 } 1981 #endif // ASSERT 1982 1983 // Conversion 1984 // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation) 1985 switch (bytecode()) { 1986 case Bytecodes::_i2l: 1987 __ extend_sign(rdx, rax); 1988 break; 1989 case Bytecodes::_i2f: 1990 if (UseSSE >= 1) { 1991 __ cvtsi2ssl(xmm0, rax); 1992 } else { 1993 __ push(rax); // store int on tos 1994 __ fild_s(at_rsp()); // load int to ST0 1995 __ f2ieee(); // truncate to float size 1996 __ pop(rcx); // adjust rsp 1997 } 1998 break; 1999 case Bytecodes::_i2d: 2000 if (UseSSE >= 2) { 2001 __ cvtsi2sdl(xmm0, rax); 2002 } else { 2003 __ push(rax); // add one slot for d2ieee() 2004 __ push(rax); // store int on tos 2005 __ fild_s(at_rsp()); // load int to ST0 2006 __ d2ieee(); // truncate to double size 2007 __ pop(rcx); // adjust rsp 2008 __ pop(rcx); 2009 } 2010 break; 2011 case Bytecodes::_i2b: 2012 __ shll(rax, 24); // truncate upper 24 bits 2013 __ sarl(rax, 24); // and sign-extend byte 2014 LP64_ONLY(__ movsbl(rax, rax)); 2015 break; 2016 case Bytecodes::_i2c: 2017 __ andl(rax, 0xFFFF); // truncate upper 16 bits 2018 LP64_ONLY(__ movzwl(rax, rax)); 2019 break; 2020 case Bytecodes::_i2s: 2021 __ shll(rax, 16); // truncate upper 16 bits 2022 __ sarl(rax, 16); // and sign-extend short 2023 LP64_ONLY(__ movswl(rax, rax)); 2024 break; 2025 case Bytecodes::_l2i: 2026 /* nothing to do */ 2027 break; 2028 case Bytecodes::_l2f: 2029 // On 64-bit platforms, the cvtsi2ssq instruction is used to convert 2030 // 64-bit long values to floats. On 32-bit platforms it is not possible 2031 // to use that instruction with 64-bit operands, therefore the FPU is 2032 // used to perform the conversion. 2033 __ push(rdx); // store long on tos 2034 __ push(rax); 2035 __ fild_d(at_rsp()); // load long to ST0 2036 __ f2ieee(); // truncate to float size 2037 __ pop(rcx); // adjust rsp 2038 __ pop(rcx); 2039 if (UseSSE >= 1) { 2040 __ push_f(); 2041 __ pop_f(xmm0); 2042 } 2043 break; 2044 case Bytecodes::_l2d: 2045 // On 32-bit platforms the FPU is used for conversion because on 2046 // 32-bit platforms it is not not possible to use the cvtsi2sdq 2047 // instruction with 64-bit operands. 2048 __ push(rdx); // store long on tos 2049 __ push(rax); 2050 __ fild_d(at_rsp()); // load long to ST0 2051 __ d2ieee(); // truncate to double size 2052 __ pop(rcx); // adjust rsp 2053 __ pop(rcx); 2054 if (UseSSE >= 2) { 2055 __ push_d(); 2056 __ pop_d(xmm0); 2057 } 2058 break; 2059 case Bytecodes::_f2i: 2060 // SharedRuntime::f2i does not differentiate between sNaNs and qNaNs 2061 // as it returns 0 for any NaN. 2062 if (UseSSE >= 1) { 2063 __ push_f(xmm0); 2064 } else { 2065 __ push(rcx); // reserve space for argument 2066 __ fstp_s(at_rsp()); // pass float argument on stack 2067 } 2068 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1); 2069 break; 2070 case Bytecodes::_f2l: 2071 // SharedRuntime::f2l does not differentiate between sNaNs and qNaNs 2072 // as it returns 0 for any NaN. 2073 if (UseSSE >= 1) { 2074 __ push_f(xmm0); 2075 } else { 2076 __ push(rcx); // reserve space for argument 2077 __ fstp_s(at_rsp()); // pass float argument on stack 2078 } 2079 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1); 2080 break; 2081 case Bytecodes::_f2d: 2082 if (UseSSE < 1) { 2083 /* nothing to do */ 2084 } else if (UseSSE == 1) { 2085 __ push_f(xmm0); 2086 __ pop_f(); 2087 } else { // UseSSE >= 2 2088 __ cvtss2sd(xmm0, xmm0); 2089 } 2090 break; 2091 case Bytecodes::_d2i: 2092 if (UseSSE >= 2) { 2093 __ push_d(xmm0); 2094 } else { 2095 __ push(rcx); // reserve space for argument 2096 __ push(rcx); 2097 __ fstp_d(at_rsp()); // pass double argument on stack 2098 } 2099 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2); 2100 break; 2101 case Bytecodes::_d2l: 2102 if (UseSSE >= 2) { 2103 __ push_d(xmm0); 2104 } else { 2105 __ push(rcx); // reserve space for argument 2106 __ push(rcx); 2107 __ fstp_d(at_rsp()); // pass double argument on stack 2108 } 2109 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2); 2110 break; 2111 case Bytecodes::_d2f: 2112 if (UseSSE <= 1) { 2113 __ push(rcx); // reserve space for f2ieee() 2114 __ f2ieee(); // truncate to float size 2115 __ pop(rcx); // adjust rsp 2116 if (UseSSE == 1) { 2117 // The cvtsd2ss instruction is not available if UseSSE==1, therefore 2118 // the conversion is performed using the FPU in this case. 2119 __ push_f(); 2120 __ pop_f(xmm0); 2121 } 2122 } else { // UseSSE >= 2 2123 __ cvtsd2ss(xmm0, xmm0); 2124 } 2125 break; 2126 default : 2127 ShouldNotReachHere(); 2128 } 2129 #endif 2130 } 2131 2132 void TemplateTable::lcmp() { 2133 transition(ltos, itos); 2134 #ifdef _LP64 2135 Label done; 2136 __ pop_l(rdx); 2137 __ cmpq(rdx, rax); 2138 __ movl(rax, -1); 2139 __ jccb(Assembler::less, done); 2140 __ setb(Assembler::notEqual, rax); 2141 __ movzbl(rax, rax); 2142 __ bind(done); 2143 #else 2144 2145 // y = rdx:rax 2146 __ pop_l(rbx, rcx); // get x = rcx:rbx 2147 __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y) 2148 __ mov(rax, rcx); 2149 #endif 2150 } 2151 2152 void TemplateTable::float_cmp(bool is_float, int unordered_result) { 2153 if ((is_float && UseSSE >= 1) || 2154 (!is_float && UseSSE >= 2)) { 2155 Label done; 2156 if (is_float) { 2157 // XXX get rid of pop here, use ... reg, mem32 2158 __ pop_f(xmm1); 2159 __ ucomiss(xmm1, xmm0); 2160 } else { 2161 // XXX get rid of pop here, use ... reg, mem64 2162 __ pop_d(xmm1); 2163 __ ucomisd(xmm1, xmm0); 2164 } 2165 if (unordered_result < 0) { 2166 __ movl(rax, -1); 2167 __ jccb(Assembler::parity, done); 2168 __ jccb(Assembler::below, done); 2169 __ setb(Assembler::notEqual, rdx); 2170 __ movzbl(rax, rdx); 2171 } else { 2172 __ movl(rax, 1); 2173 __ jccb(Assembler::parity, done); 2174 __ jccb(Assembler::above, done); 2175 __ movl(rax, 0); 2176 __ jccb(Assembler::equal, done); 2177 __ decrementl(rax); 2178 } 2179 __ bind(done); 2180 } else { 2181 #ifdef _LP64 2182 ShouldNotReachHere(); 2183 #else 2184 if (is_float) { 2185 __ fld_s(at_rsp()); 2186 } else { 2187 __ fld_d(at_rsp()); 2188 __ pop(rdx); 2189 } 2190 __ pop(rcx); 2191 __ fcmp2int(rax, unordered_result < 0); 2192 #endif // _LP64 2193 } 2194 } 2195 2196 void TemplateTable::branch(bool is_jsr, bool is_wide) { 2197 if (ValueTypesThreadLocalRecycling) { 2198 Label no_vt_recycling, no_fixing_required; 2199 const Register thread1 = NOT_LP64(rbx) LP64_ONLY(r15_thread); 2200 NOT_LP64(__ get_thread(thread1)); 2201 __ movptr(rbx, Address(thread1, in_bytes(JavaThread::vt_alloc_ptr_offset()))); 2202 __ testptr(rbx, rbx); 2203 __ jcc(Assembler::zero, no_vt_recycling); 2204 __ movptr(rcx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize)); 2205 __ testptr(rcx, rcx); 2206 __ jcc(Assembler::notZero, no_fixing_required); 2207 // vt_alloc_ptr in JavaThread is non-null but frame vt_alloc_ptr is null 2208 // which means frame vt_alloc_ptr needs to be initialized 2209 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::fix_frame_vt_alloc_ptr)); 2210 __ movptr(rcx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize)); 2211 __ bind(no_fixing_required); 2212 __ testptr(rcx, rbx); 2213 __ jcc(Assembler::equal, no_vt_recycling); 2214 __ andptr(rcx, VTBufferChunk::chunk_mask()); 2215 __ movl(rcx, Address(rcx, VTBufferChunk::index_offset())); 2216 __ andptr(rbx, VTBufferChunk::chunk_mask()); 2217 __ movl(rbx, Address(rbx, VTBufferChunk::index_offset())); 2218 __ subl(rbx, rcx); 2219 __ get_method(rcx); 2220 __ movl(rcx, Address(rcx, Method::max_vt_buffer_offset())); 2221 __ cmpl(rbx, rcx); 2222 __ jcc(Assembler::lessEqual, no_vt_recycling); 2223 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::recycle_buffered_values)); 2224 __ bind(no_vt_recycling); 2225 } 2226 2227 __ get_method(rcx); // rcx holds method 2228 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx 2229 // holds bumped taken count 2230 2231 const ByteSize be_offset = MethodCounters::backedge_counter_offset() + 2232 InvocationCounter::counter_offset(); 2233 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() + 2234 InvocationCounter::counter_offset(); 2235 2236 // Load up edx with the branch displacement 2237 if (is_wide) { 2238 __ movl(rdx, at_bcp(1)); 2239 } else { 2240 __ load_signed_short(rdx, at_bcp(1)); 2241 } 2242 __ bswapl(rdx); 2243 2244 if (!is_wide) { 2245 __ sarl(rdx, 16); 2246 } 2247 LP64_ONLY(__ movl2ptr(rdx, rdx)); 2248 2249 // Handle all the JSR stuff here, then exit. 2250 // It's much shorter and cleaner than intermingling with the non-JSR 2251 // normal-branch stuff occurring below. 2252 if (is_jsr) { 2253 // Pre-load the next target bytecode into rbx 2254 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1, 0)); 2255 2256 // compute return address as bci in rax 2257 __ lea(rax, at_bcp((is_wide ? 5 : 3) - 2258 in_bytes(ConstMethod::codes_offset()))); 2259 __ subptr(rax, Address(rcx, Method::const_offset())); 2260 // Adjust the bcp in r13 by the displacement in rdx 2261 __ addptr(rbcp, rdx); 2262 // jsr returns atos that is not an oop 2263 __ push_i(rax); 2264 __ dispatch_only(vtos, true); 2265 return; 2266 } 2267 2268 // Normal (non-jsr) branch handling 2269 2270 // Adjust the bcp in r13 by the displacement in rdx 2271 __ addptr(rbcp, rdx); 2272 2273 assert(UseLoopCounter || !UseOnStackReplacement, 2274 "on-stack-replacement requires loop counters"); 2275 Label backedge_counter_overflow; 2276 Label profile_method; 2277 Label dispatch; 2278 if (UseLoopCounter) { 2279 // increment backedge counter for backward branches 2280 // rax: MDO 2281 // rbx: MDO bumped taken-count 2282 // rcx: method 2283 // rdx: target offset 2284 // r13: target bcp 2285 // r14: locals pointer 2286 __ testl(rdx, rdx); // check if forward or backward branch 2287 __ jcc(Assembler::positive, dispatch); // count only if backward branch 2288 2289 // check if MethodCounters exists 2290 Label has_counters; 2291 __ movptr(rax, Address(rcx, Method::method_counters_offset())); 2292 __ testptr(rax, rax); 2293 __ jcc(Assembler::notZero, has_counters); 2294 __ push(rdx); 2295 __ push(rcx); 2296 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::build_method_counters), 2297 rcx); 2298 __ pop(rcx); 2299 __ pop(rdx); 2300 __ movptr(rax, Address(rcx, Method::method_counters_offset())); 2301 __ testptr(rax, rax); 2302 __ jcc(Assembler::zero, dispatch); 2303 __ bind(has_counters); 2304 2305 if (TieredCompilation) { 2306 Label no_mdo; 2307 int increment = InvocationCounter::count_increment; 2308 if (ProfileInterpreter) { 2309 // Are we profiling? 2310 __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset()))); 2311 __ testptr(rbx, rbx); 2312 __ jccb(Assembler::zero, no_mdo); 2313 // Increment the MDO backedge counter 2314 const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) + 2315 in_bytes(InvocationCounter::counter_offset())); 2316 const Address mask(rbx, in_bytes(MethodData::backedge_mask_offset())); 2317 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, 2318 rax, false, Assembler::zero, &backedge_counter_overflow); 2319 __ jmp(dispatch); 2320 } 2321 __ bind(no_mdo); 2322 // Increment backedge counter in MethodCounters* 2323 __ movptr(rcx, Address(rcx, Method::method_counters_offset())); 2324 const Address mask(rcx, in_bytes(MethodCounters::backedge_mask_offset())); 2325 __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask, 2326 rax, false, Assembler::zero, &backedge_counter_overflow); 2327 } else { // not TieredCompilation 2328 // increment counter 2329 __ movptr(rcx, Address(rcx, Method::method_counters_offset())); 2330 __ movl(rax, Address(rcx, be_offset)); // load backedge counter 2331 __ incrementl(rax, InvocationCounter::count_increment); // increment counter 2332 __ movl(Address(rcx, be_offset), rax); // store counter 2333 2334 __ movl(rax, Address(rcx, inv_offset)); // load invocation counter 2335 2336 __ andl(rax, InvocationCounter::count_mask_value); // and the status bits 2337 __ addl(rax, Address(rcx, be_offset)); // add both counters 2338 2339 if (ProfileInterpreter) { 2340 // Test to see if we should create a method data oop 2341 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 2342 __ jcc(Assembler::less, dispatch); 2343 2344 // if no method data exists, go to profile method 2345 __ test_method_data_pointer(rax, profile_method); 2346 2347 if (UseOnStackReplacement) { 2348 // check for overflow against rbx which is the MDO taken count 2349 __ cmp32(rbx, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()))); 2350 __ jcc(Assembler::below, dispatch); 2351 2352 // When ProfileInterpreter is on, the backedge_count comes 2353 // from the MethodData*, which value does not get reset on 2354 // the call to frequency_counter_overflow(). To avoid 2355 // excessive calls to the overflow routine while the method is 2356 // being compiled, add a second test to make sure the overflow 2357 // function is called only once every overflow_frequency. 2358 const int overflow_frequency = 1024; 2359 __ andl(rbx, overflow_frequency - 1); 2360 __ jcc(Assembler::zero, backedge_counter_overflow); 2361 2362 } 2363 } else { 2364 if (UseOnStackReplacement) { 2365 // check for overflow against rax, which is the sum of the 2366 // counters 2367 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()))); 2368 __ jcc(Assembler::aboveEqual, backedge_counter_overflow); 2369 2370 } 2371 } 2372 } 2373 __ bind(dispatch); 2374 } 2375 2376 // Pre-load the next target bytecode into rbx 2377 __ load_unsigned_byte(rbx, Address(rbcp, 0)); 2378 2379 // continue with the bytecode @ target 2380 // rax: return bci for jsr's, unused otherwise 2381 // rbx: target bytecode 2382 // r13: target bcp 2383 __ dispatch_only(vtos, true); 2384 2385 if (UseLoopCounter) { 2386 if (ProfileInterpreter) { 2387 // Out-of-line code to allocate method data oop. 2388 __ bind(profile_method); 2389 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 2390 __ set_method_data_pointer_for_bcp(); 2391 __ jmp(dispatch); 2392 } 2393 2394 if (UseOnStackReplacement) { 2395 // invocation counter overflow 2396 __ bind(backedge_counter_overflow); 2397 __ negptr(rdx); 2398 __ addptr(rdx, rbcp); // branch bcp 2399 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp) 2400 __ call_VM(noreg, 2401 CAST_FROM_FN_PTR(address, 2402 InterpreterRuntime::frequency_counter_overflow), 2403 rdx); 2404 2405 // rax: osr nmethod (osr ok) or NULL (osr not possible) 2406 // rdx: scratch 2407 // r14: locals pointer 2408 // r13: bcp 2409 __ testptr(rax, rax); // test result 2410 __ jcc(Assembler::zero, dispatch); // no osr if null 2411 // nmethod may have been invalidated (VM may block upon call_VM return) 2412 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use); 2413 __ jcc(Assembler::notEqual, dispatch); 2414 2415 // We have the address of an on stack replacement routine in rax. 2416 // In preparation of invoking it, first we must migrate the locals 2417 // and monitors from off the interpreter frame on the stack. 2418 // Ensure to save the osr nmethod over the migration call, 2419 // it will be preserved in rbx. 2420 __ mov(rbx, rax); 2421 2422 NOT_LP64(__ get_thread(rcx)); 2423 2424 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin)); 2425 2426 // rax is OSR buffer, move it to expected parameter location 2427 LP64_ONLY(__ mov(j_rarg0, rax)); 2428 NOT_LP64(__ mov(rcx, rax)); 2429 // We use j_rarg definitions here so that registers don't conflict as parameter 2430 // registers change across platforms as we are in the midst of a calling 2431 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters. 2432 2433 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi); 2434 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx); 2435 2436 // pop the interpreter frame 2437 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 2438 __ leave(); // remove frame anchor 2439 __ pop(retaddr); // get return address 2440 __ mov(rsp, sender_sp); // set sp to sender sp 2441 // Ensure compiled code always sees stack at proper alignment 2442 __ andptr(rsp, -(StackAlignmentInBytes)); 2443 2444 // unlike x86 we need no specialized return from compiled code 2445 // to the interpreter or the call stub. 2446 2447 // push the return address 2448 __ push(retaddr); 2449 2450 // and begin the OSR nmethod 2451 __ jmp(Address(rbx, nmethod::osr_entry_point_offset())); 2452 } 2453 } 2454 } 2455 2456 void TemplateTable::if_0cmp(Condition cc) { 2457 transition(itos, vtos); 2458 // assume branch is more often taken than not (loops use backward branches) 2459 Label not_taken; 2460 __ testl(rax, rax); 2461 __ jcc(j_not(cc), not_taken); 2462 branch(false, false); 2463 __ bind(not_taken); 2464 __ profile_not_taken_branch(rax); 2465 } 2466 2467 void TemplateTable::if_icmp(Condition cc) { 2468 transition(itos, vtos); 2469 // assume branch is more often taken than not (loops use backward branches) 2470 Label not_taken; 2471 __ pop_i(rdx); 2472 __ cmpl(rdx, rax); 2473 __ jcc(j_not(cc), not_taken); 2474 branch(false, false); 2475 __ bind(not_taken); 2476 __ profile_not_taken_branch(rax); 2477 } 2478 2479 void TemplateTable::if_nullcmp(Condition cc) { 2480 transition(atos, vtos); 2481 // assume branch is more often taken than not (loops use backward branches) 2482 Label not_taken; 2483 __ testptr(rax, rax); 2484 __ jcc(j_not(cc), not_taken); 2485 branch(false, false); 2486 __ bind(not_taken); 2487 __ profile_not_taken_branch(rax); 2488 } 2489 2490 void TemplateTable::if_acmp(Condition cc) { 2491 transition(atos, vtos); 2492 // assume branch is more often taken than not (loops use backward branches) 2493 Label not_taken; 2494 __ pop_ptr(rdx); 2495 __ cmpoop(rdx, rax); 2496 __ jcc(j_not(cc), not_taken); 2497 branch(false, false); 2498 __ bind(not_taken); 2499 __ profile_not_taken_branch(rax); 2500 } 2501 2502 void TemplateTable::ret() { 2503 transition(vtos, vtos); 2504 locals_index(rbx); 2505 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp 2506 NOT_LP64(__ movptr(rbx, iaddress(rbx))); 2507 __ profile_ret(rbx, rcx); 2508 __ get_method(rax); 2509 __ movptr(rbcp, Address(rax, Method::const_offset())); 2510 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, 2511 ConstMethod::codes_offset())); 2512 __ dispatch_next(vtos, 0, true); 2513 } 2514 2515 void TemplateTable::wide_ret() { 2516 transition(vtos, vtos); 2517 locals_index_wide(rbx); 2518 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp 2519 __ profile_ret(rbx, rcx); 2520 __ get_method(rax); 2521 __ movptr(rbcp, Address(rax, Method::const_offset())); 2522 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset())); 2523 __ dispatch_next(vtos, 0, true); 2524 } 2525 2526 void TemplateTable::tableswitch() { 2527 Label default_case, continue_execution; 2528 transition(itos, vtos); 2529 2530 // align r13/rsi 2531 __ lea(rbx, at_bcp(BytesPerInt)); 2532 __ andptr(rbx, -BytesPerInt); 2533 // load lo & hi 2534 __ movl(rcx, Address(rbx, BytesPerInt)); 2535 __ movl(rdx, Address(rbx, 2 * BytesPerInt)); 2536 __ bswapl(rcx); 2537 __ bswapl(rdx); 2538 // check against lo & hi 2539 __ cmpl(rax, rcx); 2540 __ jcc(Assembler::less, default_case); 2541 __ cmpl(rax, rdx); 2542 __ jcc(Assembler::greater, default_case); 2543 // lookup dispatch offset 2544 __ subl(rax, rcx); 2545 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt)); 2546 __ profile_switch_case(rax, rbx, rcx); 2547 // continue execution 2548 __ bind(continue_execution); 2549 __ bswapl(rdx); 2550 LP64_ONLY(__ movl2ptr(rdx, rdx)); 2551 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1)); 2552 __ addptr(rbcp, rdx); 2553 __ dispatch_only(vtos, true); 2554 // handle default 2555 __ bind(default_case); 2556 __ profile_switch_default(rax); 2557 __ movl(rdx, Address(rbx, 0)); 2558 __ jmp(continue_execution); 2559 } 2560 2561 void TemplateTable::lookupswitch() { 2562 transition(itos, itos); 2563 __ stop("lookupswitch bytecode should have been rewritten"); 2564 } 2565 2566 void TemplateTable::fast_linearswitch() { 2567 transition(itos, vtos); 2568 Label loop_entry, loop, found, continue_execution; 2569 // bswap rax so we can avoid bswapping the table entries 2570 __ bswapl(rax); 2571 // align r13 2572 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of 2573 // this instruction (change offsets 2574 // below) 2575 __ andptr(rbx, -BytesPerInt); 2576 // set counter 2577 __ movl(rcx, Address(rbx, BytesPerInt)); 2578 __ bswapl(rcx); 2579 __ jmpb(loop_entry); 2580 // table search 2581 __ bind(loop); 2582 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt)); 2583 __ jcc(Assembler::equal, found); 2584 __ bind(loop_entry); 2585 __ decrementl(rcx); 2586 __ jcc(Assembler::greaterEqual, loop); 2587 // default case 2588 __ profile_switch_default(rax); 2589 __ movl(rdx, Address(rbx, 0)); 2590 __ jmp(continue_execution); 2591 // entry found -> get offset 2592 __ bind(found); 2593 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt)); 2594 __ profile_switch_case(rcx, rax, rbx); 2595 // continue execution 2596 __ bind(continue_execution); 2597 __ bswapl(rdx); 2598 __ movl2ptr(rdx, rdx); 2599 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1)); 2600 __ addptr(rbcp, rdx); 2601 __ dispatch_only(vtos, true); 2602 } 2603 2604 void TemplateTable::fast_binaryswitch() { 2605 transition(itos, vtos); 2606 // Implementation using the following core algorithm: 2607 // 2608 // int binary_search(int key, LookupswitchPair* array, int n) { 2609 // // Binary search according to "Methodik des Programmierens" by 2610 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985. 2611 // int i = 0; 2612 // int j = n; 2613 // while (i+1 < j) { 2614 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q) 2615 // // with Q: for all i: 0 <= i < n: key < a[i] 2616 // // where a stands for the array and assuming that the (inexisting) 2617 // // element a[n] is infinitely big. 2618 // int h = (i + j) >> 1; 2619 // // i < h < j 2620 // if (key < array[h].fast_match()) { 2621 // j = h; 2622 // } else { 2623 // i = h; 2624 // } 2625 // } 2626 // // R: a[i] <= key < a[i+1] or Q 2627 // // (i.e., if key is within array, i is the correct index) 2628 // return i; 2629 // } 2630 2631 // Register allocation 2632 const Register key = rax; // already set (tosca) 2633 const Register array = rbx; 2634 const Register i = rcx; 2635 const Register j = rdx; 2636 const Register h = rdi; 2637 const Register temp = rsi; 2638 2639 // Find array start 2640 NOT_LP64(__ save_bcp()); 2641 2642 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to 2643 // get rid of this 2644 // instruction (change 2645 // offsets below) 2646 __ andptr(array, -BytesPerInt); 2647 2648 // Initialize i & j 2649 __ xorl(i, i); // i = 0; 2650 __ movl(j, Address(array, -BytesPerInt)); // j = length(array); 2651 2652 // Convert j into native byteordering 2653 __ bswapl(j); 2654 2655 // And start 2656 Label entry; 2657 __ jmp(entry); 2658 2659 // binary search loop 2660 { 2661 Label loop; 2662 __ bind(loop); 2663 // int h = (i + j) >> 1; 2664 __ leal(h, Address(i, j, Address::times_1)); // h = i + j; 2665 __ sarl(h, 1); // h = (i + j) >> 1; 2666 // if (key < array[h].fast_match()) { 2667 // j = h; 2668 // } else { 2669 // i = h; 2670 // } 2671 // Convert array[h].match to native byte-ordering before compare 2672 __ movl(temp, Address(array, h, Address::times_8)); 2673 __ bswapl(temp); 2674 __ cmpl(key, temp); 2675 // j = h if (key < array[h].fast_match()) 2676 __ cmov32(Assembler::less, j, h); 2677 // i = h if (key >= array[h].fast_match()) 2678 __ cmov32(Assembler::greaterEqual, i, h); 2679 // while (i+1 < j) 2680 __ bind(entry); 2681 __ leal(h, Address(i, 1)); // i+1 2682 __ cmpl(h, j); // i+1 < j 2683 __ jcc(Assembler::less, loop); 2684 } 2685 2686 // end of binary search, result index is i (must check again!) 2687 Label default_case; 2688 // Convert array[i].match to native byte-ordering before compare 2689 __ movl(temp, Address(array, i, Address::times_8)); 2690 __ bswapl(temp); 2691 __ cmpl(key, temp); 2692 __ jcc(Assembler::notEqual, default_case); 2693 2694 // entry found -> j = offset 2695 __ movl(j , Address(array, i, Address::times_8, BytesPerInt)); 2696 __ profile_switch_case(i, key, array); 2697 __ bswapl(j); 2698 LP64_ONLY(__ movslq(j, j)); 2699 2700 NOT_LP64(__ restore_bcp()); 2701 NOT_LP64(__ restore_locals()); // restore rdi 2702 2703 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1)); 2704 __ addptr(rbcp, j); 2705 __ dispatch_only(vtos, true); 2706 2707 // default case -> j = default offset 2708 __ bind(default_case); 2709 __ profile_switch_default(i); 2710 __ movl(j, Address(array, -2 * BytesPerInt)); 2711 __ bswapl(j); 2712 LP64_ONLY(__ movslq(j, j)); 2713 2714 NOT_LP64(__ restore_bcp()); 2715 NOT_LP64(__ restore_locals()); 2716 2717 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1)); 2718 __ addptr(rbcp, j); 2719 __ dispatch_only(vtos, true); 2720 } 2721 2722 void TemplateTable::_return(TosState state) { 2723 transition(state, state); 2724 2725 assert(_desc->calls_vm(), 2726 "inconsistent calls_vm information"); // call in remove_activation 2727 2728 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) { 2729 assert(state == vtos, "only valid state"); 2730 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax); 2731 __ movptr(robj, aaddress(0)); 2732 __ load_klass(rdi, robj); 2733 __ movl(rdi, Address(rdi, Klass::access_flags_offset())); 2734 __ testl(rdi, JVM_ACC_HAS_FINALIZER); 2735 Label skip_register_finalizer; 2736 __ jcc(Assembler::zero, skip_register_finalizer); 2737 2738 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj); 2739 2740 __ bind(skip_register_finalizer); 2741 } 2742 2743 if (SafepointMechanism::uses_thread_local_poll() && _desc->bytecode() != Bytecodes::_return_register_finalizer) { 2744 Label no_safepoint; 2745 NOT_PRODUCT(__ block_comment("Thread-local Safepoint poll")); 2746 #ifdef _LP64 2747 __ testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 2748 #else 2749 const Register thread = rdi; 2750 __ get_thread(thread); 2751 __ testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 2752 #endif 2753 __ jcc(Assembler::zero, no_safepoint); 2754 __ push(state); 2755 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 2756 InterpreterRuntime::at_safepoint)); 2757 __ pop(state); 2758 __ bind(no_safepoint); 2759 } 2760 2761 if (state == atos) { 2762 Label not_returning_null_vt; 2763 const Register method = rbx; 2764 2765 __ testl(rax, rax); 2766 __ jcc(Assembler::notZero, not_returning_null_vt); 2767 __ get_method(method); 2768 __ cmpb(Address(rbx, Method::flags_offset() + in_ByteSize(1)), Method::byte_value_for_known_not_returning_vt()); 2769 __ jcc(Assembler::equal, not_returning_null_vt); 2770 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::deoptimize_caller_frame_for_vt), method); 2771 __ bind(not_returning_null_vt); 2772 if (ValueTypesBufferMaxMemory > 0) { 2773 Label notBuffered; 2774 2775 __ test_value_is_not_buffered(rax, rbx, notBuffered); 2776 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread); 2777 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::return_value), rax); 2778 NOT_LP64(__ get_thread(thread1)); 2779 __ get_vm_result(rax, thread1); 2780 __ bind(notBuffered); 2781 } 2782 } 2783 2784 // Narrow result if state is itos but result type is smaller. 2785 // Need to narrow in the return bytecode rather than in generate_return_entry 2786 // since compiled code callers expect the result to already be narrowed. 2787 if (state == itos) { 2788 __ narrow(rax); 2789 } 2790 2791 __ remove_activation(state, rbcp, true, true, true, /*state == qtos*/ false && ValueTypeReturnedAsFields); 2792 2793 __ jmp(rbcp); 2794 } 2795 2796 // ---------------------------------------------------------------------------- 2797 // Volatile variables demand their effects be made known to all CPU's 2798 // in order. Store buffers on most chips allow reads & writes to 2799 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode 2800 // without some kind of memory barrier (i.e., it's not sufficient that 2801 // the interpreter does not reorder volatile references, the hardware 2802 // also must not reorder them). 2803 // 2804 // According to the new Java Memory Model (JMM): 2805 // (1) All volatiles are serialized wrt to each other. ALSO reads & 2806 // writes act as aquire & release, so: 2807 // (2) A read cannot let unrelated NON-volatile memory refs that 2808 // happen after the read float up to before the read. It's OK for 2809 // non-volatile memory refs that happen before the volatile read to 2810 // float down below it. 2811 // (3) Similar a volatile write cannot let unrelated NON-volatile 2812 // memory refs that happen BEFORE the write float down to after the 2813 // write. It's OK for non-volatile memory refs that happen after the 2814 // volatile write to float up before it. 2815 // 2816 // We only put in barriers around volatile refs (they are expensive), 2817 // not _between_ memory refs (that would require us to track the 2818 // flavor of the previous memory refs). Requirements (2) and (3) 2819 // require some barriers before volatile stores and after volatile 2820 // loads. These nearly cover requirement (1) but miss the 2821 // volatile-store-volatile-load case. This final case is placed after 2822 // volatile-stores although it could just as well go before 2823 // volatile-loads. 2824 2825 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) { 2826 // Helper function to insert a is-volatile test and memory barrier 2827 if(!os::is_MP()) return; // Not needed on single CPU 2828 __ membar(order_constraint); 2829 } 2830 2831 void TemplateTable::resolve_cache_and_index(int byte_no, 2832 Register Rcache, 2833 Register index, 2834 size_t index_size) { 2835 const Register temp = rbx; 2836 assert_different_registers(Rcache, index, temp); 2837 2838 Label resolved; 2839 2840 Bytecodes::Code code = bytecode(); 2841 switch (code) { 2842 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break; 2843 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break; 2844 default: break; 2845 } 2846 2847 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 2848 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size); 2849 __ cmpl(temp, code); // have we resolved this bytecode? 2850 __ jcc(Assembler::equal, resolved); 2851 2852 // resolve first time through 2853 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache); 2854 __ movl(temp, code); 2855 __ call_VM(noreg, entry, temp); 2856 // Update registers with resolved info 2857 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); 2858 __ bind(resolved); 2859 } 2860 2861 // The cache and index registers must be set before call 2862 void TemplateTable::load_field_cp_cache_entry(Register obj, 2863 Register cache, 2864 Register index, 2865 Register off, 2866 Register flags, 2867 bool is_static = false) { 2868 assert_different_registers(cache, index, flags, off); 2869 2870 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2871 // Field offset 2872 __ movptr(off, Address(cache, index, Address::times_ptr, 2873 in_bytes(cp_base_offset + 2874 ConstantPoolCacheEntry::f2_offset()))); 2875 // Flags 2876 __ movl(flags, Address(cache, index, Address::times_ptr, 2877 in_bytes(cp_base_offset + 2878 ConstantPoolCacheEntry::flags_offset()))); 2879 2880 // klass overwrite register 2881 if (is_static) { 2882 __ movptr(obj, Address(cache, index, Address::times_ptr, 2883 in_bytes(cp_base_offset + 2884 ConstantPoolCacheEntry::f1_offset()))); 2885 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 2886 __ movptr(obj, Address(obj, mirror_offset)); 2887 __ resolve_oop_handle(obj); 2888 } 2889 } 2890 2891 void TemplateTable::load_invoke_cp_cache_entry(int byte_no, 2892 Register method, 2893 Register itable_index, 2894 Register flags, 2895 bool is_invokevirtual, 2896 bool is_invokevfinal, /*unused*/ 2897 bool is_invokedynamic) { 2898 // setup registers 2899 const Register cache = rcx; 2900 const Register index = rdx; 2901 assert_different_registers(method, flags); 2902 assert_different_registers(method, cache, index); 2903 assert_different_registers(itable_index, flags); 2904 assert_different_registers(itable_index, cache, index); 2905 // determine constant pool cache field offsets 2906 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant"); 2907 const int method_offset = in_bytes( 2908 ConstantPoolCache::base_offset() + 2909 ((byte_no == f2_byte) 2910 ? ConstantPoolCacheEntry::f2_offset() 2911 : ConstantPoolCacheEntry::f1_offset())); 2912 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + 2913 ConstantPoolCacheEntry::flags_offset()); 2914 // access constant pool cache fields 2915 const int index_offset = in_bytes(ConstantPoolCache::base_offset() + 2916 ConstantPoolCacheEntry::f2_offset()); 2917 2918 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2)); 2919 resolve_cache_and_index(byte_no, cache, index, index_size); 2920 __ movptr(method, Address(cache, index, Address::times_ptr, method_offset)); 2921 2922 if (itable_index != noreg) { 2923 // pick up itable or appendix index from f2 also: 2924 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset)); 2925 } 2926 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset)); 2927 } 2928 2929 // The registers cache and index expected to be set before call. 2930 // Correct values of the cache and index registers are preserved. 2931 void TemplateTable::jvmti_post_field_access(Register cache, 2932 Register index, 2933 bool is_static, 2934 bool has_tos) { 2935 if (JvmtiExport::can_post_field_access()) { 2936 // Check to see if a field access watch has been set before we take 2937 // the time to call into the VM. 2938 Label L1; 2939 assert_different_registers(cache, index, rax); 2940 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 2941 __ testl(rax,rax); 2942 __ jcc(Assembler::zero, L1); 2943 2944 // cache entry pointer 2945 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 2946 __ shll(index, LogBytesPerWord); 2947 __ addptr(cache, index); 2948 if (is_static) { 2949 __ xorptr(rax, rax); // NULL object reference 2950 } else { 2951 __ pop(atos); // Get the object 2952 __ verify_oop(rax); 2953 __ push(atos); // Restore stack state 2954 } 2955 // rax,: object pointer or NULL 2956 // cache: cache entry pointer 2957 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), 2958 rax, cache); 2959 __ get_cache_and_index_at_bcp(cache, index, 1); 2960 __ bind(L1); 2961 } 2962 } 2963 2964 void TemplateTable::pop_and_check_object(Register r) { 2965 __ pop_ptr(r); 2966 __ null_check(r); // for field access must check obj. 2967 __ verify_oop(r); 2968 } 2969 2970 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 2971 transition(vtos, vtos); 2972 2973 const Register cache = rcx; 2974 const Register index = rdx; 2975 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 2976 const Register off = rbx; 2977 const Register flags = rax; 2978 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them 2979 const Register flags2 = rdx; 2980 2981 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 2982 jvmti_post_field_access(cache, index, is_static, false); 2983 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 2984 2985 const Address field(obj, off, Address::times_1, 0*wordSize); 2986 NOT_LP64(const Address hi(obj, off, Address::times_1, 1*wordSize)); 2987 2988 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notValueType, notDouble; 2989 2990 if (!is_static) { 2991 __ movptr(rcx, Address(cache, index, Address::times_ptr, 2992 in_bytes(ConstantPoolCache::base_offset() + 2993 ConstantPoolCacheEntry::f1_offset()))); 2994 } 2995 2996 __ movl(flags2, flags); 2997 2998 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 2999 // Make sure we don't need to mask edx after the above shift 3000 assert(btos == 0, "change code, btos != 0"); 3001 3002 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 3003 3004 __ jcc(Assembler::notZero, notByte); 3005 // btos 3006 if (!is_static) pop_and_check_object(obj); 3007 __ load_signed_byte(rax, field); 3008 __ push(btos); 3009 // Rewrite bytecode to be faster 3010 if (!is_static && rc == may_rewrite) { 3011 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 3012 } 3013 __ jmp(Done); 3014 3015 __ bind(notByte); 3016 3017 __ cmpl(flags, ztos); 3018 __ jcc(Assembler::notEqual, notBool); 3019 if (!is_static) pop_and_check_object(obj); 3020 // ztos (same code as btos) 3021 __ load_signed_byte(rax, field); 3022 __ push(ztos); 3023 // Rewrite bytecode to be faster 3024 if (!is_static && rc == may_rewrite) { 3025 // use btos rewriting, no truncating to t/f bit is needed for getfield. 3026 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 3027 } 3028 __ jmp(Done); 3029 3030 __ bind(notBool); 3031 __ cmpl(flags, atos); 3032 __ jcc(Assembler::notEqual, notObj); 3033 // atos 3034 if (!EnableValhalla) { 3035 if (!is_static) pop_and_check_object(obj); 3036 do_oop_load(_masm, field, rax); 3037 __ push(atos); 3038 if (!is_static && rc == may_rewrite) { 3039 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx); 3040 } 3041 __ jmp(Done); 3042 } else { 3043 if (is_static) { 3044 __ load_heap_oop(rax, field); 3045 Label isFlattenable, uninitialized; 3046 // Issue below if the static field has not been initialized yet 3047 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable); 3048 // Not flattenable case 3049 __ push(atos); 3050 __ jmp(Done); 3051 // Flattenable case, must not return null even if uninitialized 3052 __ bind(isFlattenable); 3053 __ testptr(rax, rax); 3054 __ jcc(Assembler::zero, uninitialized); 3055 __ push(atos); 3056 __ jmp(Done); 3057 __ bind(uninitialized); 3058 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask); 3059 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_static_value_field), 3060 obj, flags2); 3061 __ verify_oop(rax); 3062 __ push(atos); 3063 __ jmp(Done); 3064 } else { 3065 Label isFlattened, nonnull, isFlattenable, rewriteFlattenable; 3066 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable); 3067 // Non-flattenable field case, also covers the object case 3068 pop_and_check_object(obj); 3069 __ load_heap_oop(rax, field); 3070 __ push(atos); 3071 if (rc == may_rewrite) { 3072 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx); 3073 } 3074 __ jmp(Done); 3075 __ bind(isFlattenable); 3076 __ test_field_is_flattened(flags2, rscratch1, isFlattened); 3077 // Non-flattened field case 3078 pop_and_check_object(obj); 3079 __ load_heap_oop(rax, field); 3080 __ testptr(rax, rax); 3081 __ jcc(Assembler::notZero, nonnull); 3082 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask); 3083 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field), 3084 obj, flags2); 3085 __ bind(nonnull); 3086 __ verify_oop(rax); 3087 __ push(atos); 3088 __ jmp(rewriteFlattenable); 3089 __ bind(isFlattened); 3090 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask); 3091 pop_and_check_object(rbx); 3092 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field), 3093 rbx, flags2, rcx); 3094 __ verify_oop(rax); 3095 __ push(atos); 3096 __ bind(rewriteFlattenable); 3097 if (rc == may_rewrite) { 3098 patch_bytecode(Bytecodes::_fast_qgetfield, bc, rbx); 3099 } 3100 __ jmp(Done); 3101 } 3102 } 3103 3104 __ bind(notObj); 3105 3106 if (!is_static) pop_and_check_object(obj); 3107 3108 __ cmpl(flags, itos); 3109 __ jcc(Assembler::notEqual, notInt); 3110 // itos 3111 __ movl(rax, field); 3112 __ push(itos); 3113 // Rewrite bytecode to be faster 3114 if (!is_static && rc == may_rewrite) { 3115 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx); 3116 } 3117 __ jmp(Done); 3118 3119 __ bind(notInt); 3120 __ cmpl(flags, ctos); 3121 __ jcc(Assembler::notEqual, notChar); 3122 // ctos 3123 __ load_unsigned_short(rax, field); 3124 __ push(ctos); 3125 // Rewrite bytecode to be faster 3126 if (!is_static && rc == may_rewrite) { 3127 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx); 3128 } 3129 __ jmp(Done); 3130 3131 __ bind(notChar); 3132 __ cmpl(flags, stos); 3133 __ jcc(Assembler::notEqual, notShort); 3134 // stos 3135 __ load_signed_short(rax, field); 3136 __ push(stos); 3137 // Rewrite bytecode to be faster 3138 if (!is_static && rc == may_rewrite) { 3139 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx); 3140 } 3141 __ jmp(Done); 3142 3143 __ bind(notShort); 3144 __ cmpl(flags, ltos); 3145 __ jcc(Assembler::notEqual, notLong); 3146 // ltos 3147 3148 #ifndef _LP64 3149 // Generate code as if volatile. There just aren't enough registers to 3150 // save that information and this code is faster than the test. 3151 __ fild_d(field); // Must load atomically 3152 __ subptr(rsp,2*wordSize); // Make space for store 3153 __ fistp_d(Address(rsp,0)); 3154 __ pop(rax); 3155 __ pop(rdx); 3156 #else 3157 __ movq(rax, field); 3158 #endif 3159 3160 __ push(ltos); 3161 // Rewrite bytecode to be faster 3162 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx)); 3163 __ jmp(Done); 3164 3165 __ bind(notLong); 3166 __ cmpl(flags, ftos); 3167 __ jcc(Assembler::notEqual, notFloat); 3168 // ftos 3169 3170 __ load_float(field); 3171 __ push(ftos); 3172 // Rewrite bytecode to be faster 3173 if (!is_static && rc == may_rewrite) { 3174 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx); 3175 } 3176 __ jmp(Done); 3177 3178 __ bind(notFloat); 3179 #ifdef ASSERT 3180 __ cmpl(flags, dtos); 3181 __ jcc(Assembler::notEqual, notDouble); 3182 #endif 3183 // dtos 3184 __ load_double(field); 3185 __ push(dtos); 3186 // Rewrite bytecode to be faster 3187 if (!is_static && rc == may_rewrite) { 3188 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx); 3189 } 3190 #ifdef ASSERT 3191 __ jmp(Done); 3192 3193 3194 __ bind(notDouble); 3195 __ stop("Bad state"); 3196 #endif 3197 3198 __ bind(Done); 3199 // [jk] not needed currently 3200 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad | 3201 // Assembler::LoadStore)); 3202 } 3203 3204 void TemplateTable::getfield(int byte_no) { 3205 getfield_or_static(byte_no, false); 3206 } 3207 3208 void TemplateTable::nofast_getfield(int byte_no) { 3209 getfield_or_static(byte_no, false, may_not_rewrite); 3210 } 3211 3212 void TemplateTable::getstatic(int byte_no) { 3213 getfield_or_static(byte_no, true); 3214 } 3215 3216 void TemplateTable::withfield() { 3217 transition(vtos, atos); 3218 3219 Register cache = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 3220 Register index = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 3221 3222 resolve_cache_and_index(f2_byte, cache, index, sizeof(u2)); 3223 3224 call_VM(rbx, CAST_FROM_FN_PTR(address, InterpreterRuntime::withfield), cache); 3225 // new value type is returned in rbx 3226 // stack adjustement is returned in rax 3227 __ verify_oop(rbx); 3228 __ addptr(rsp, rax); 3229 __ movptr(rax, rbx); 3230 } 3231 3232 // The registers cache and index expected to be set before call. 3233 // The function may destroy various registers, just not the cache and index registers. 3234 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) { 3235 3236 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax); 3237 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 3238 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3239 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx); 3240 3241 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 3242 3243 if (JvmtiExport::can_post_field_modification()) { 3244 // Check to see if a field modification watch has been set before 3245 // we take the time to call into the VM. 3246 Label L1; 3247 assert_different_registers(cache, index, rax); 3248 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 3249 __ testl(rax, rax); 3250 __ jcc(Assembler::zero, L1); 3251 3252 __ get_cache_and_index_at_bcp(robj, RDX, 1); 3253 3254 3255 if (is_static) { 3256 // Life is simple. Null out the object pointer. 3257 __ xorl(RBX, RBX); 3258 3259 } else { 3260 // Life is harder. The stack holds the value on top, followed by 3261 // the object. We don't know the size of the value, though; it 3262 // could be one or two words depending on its type. As a result, 3263 // we must find the type to determine where the object is. 3264 #ifndef _LP64 3265 Label two_word, valsize_known; 3266 #endif 3267 __ movl(RCX, Address(robj, RDX, 3268 Address::times_ptr, 3269 in_bytes(cp_base_offset + 3270 ConstantPoolCacheEntry::flags_offset()))); 3271 NOT_LP64(__ mov(rbx, rsp)); 3272 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift); 3273 3274 // Make sure we don't need to mask rcx after the above shift 3275 ConstantPoolCacheEntry::verify_tos_state_shift(); 3276 #ifdef _LP64 3277 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue 3278 __ cmpl(c_rarg3, ltos); 3279 __ cmovptr(Assembler::equal, 3280 c_rarg1, at_tos_p2()); // ltos (two word jvalue) 3281 __ cmpl(c_rarg3, dtos); 3282 __ cmovptr(Assembler::equal, 3283 c_rarg1, at_tos_p2()); // dtos (two word jvalue) 3284 #else 3285 __ cmpl(rcx, ltos); 3286 __ jccb(Assembler::equal, two_word); 3287 __ cmpl(rcx, dtos); 3288 __ jccb(Assembler::equal, two_word); 3289 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos) 3290 __ jmpb(valsize_known); 3291 3292 __ bind(two_word); 3293 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue 3294 3295 __ bind(valsize_known); 3296 // setup object pointer 3297 __ movptr(rbx, Address(rbx, 0)); 3298 #endif 3299 } 3300 // cache entry pointer 3301 __ addptr(robj, in_bytes(cp_base_offset)); 3302 __ shll(RDX, LogBytesPerWord); 3303 __ addptr(robj, RDX); 3304 // object (tos) 3305 __ mov(RCX, rsp); 3306 // c_rarg1: object pointer set up above (NULL if static) 3307 // c_rarg2: cache entry pointer 3308 // c_rarg3: jvalue object on the stack 3309 __ call_VM(noreg, 3310 CAST_FROM_FN_PTR(address, 3311 InterpreterRuntime::post_field_modification), 3312 RBX, robj, RCX); 3313 __ get_cache_and_index_at_bcp(cache, index, 1); 3314 __ bind(L1); 3315 } 3316 } 3317 3318 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 3319 transition(vtos, vtos); 3320 3321 const Register cache = rcx; 3322 const Register index = rdx; 3323 const Register obj = rcx; 3324 const Register off = rbx; 3325 const Register flags = rax; 3326 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3327 const Register flags2 = rdx; 3328 3329 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 3330 jvmti_post_field_mod(cache, index, is_static); 3331 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 3332 3333 // [jk] not needed currently 3334 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 3335 // Assembler::StoreStore)); 3336 3337 Label notVolatile, Done; 3338 3339 __ movl(flags2, flags); 3340 3341 // field addresses 3342 const Address field(obj, off, Address::times_1, 0*wordSize); 3343 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);) 3344 3345 Label notByte, notBool, notInt, notShort, notChar, 3346 notLong, notFloat, notObj, notValueType, notDouble; 3347 3348 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 3349 3350 assert(btos == 0, "change code, btos != 0"); 3351 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); 3352 __ jcc(Assembler::notZero, notByte); 3353 3354 // btos 3355 { 3356 __ pop(btos); 3357 if (!is_static) pop_and_check_object(obj); 3358 __ movb(field, rax); 3359 if (!is_static && rc == may_rewrite) { 3360 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no); 3361 } 3362 __ jmp(Done); 3363 } 3364 3365 __ bind(notByte); 3366 __ cmpl(flags, ztos); 3367 __ jcc(Assembler::notEqual, notBool); 3368 3369 // ztos 3370 { 3371 __ pop(ztos); 3372 if (!is_static) pop_and_check_object(obj); 3373 __ andl(rax, 0x1); 3374 __ movb(field, rax); 3375 if (!is_static && rc == may_rewrite) { 3376 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no); 3377 } 3378 __ jmp(Done); 3379 } 3380 3381 __ bind(notBool); 3382 __ cmpl(flags, atos); 3383 __ jcc(Assembler::notEqual, notObj); 3384 3385 // atos 3386 { 3387 if (!EnableValhalla) { 3388 __ pop(atos); 3389 if (!is_static) pop_and_check_object(obj); 3390 // Store into the field 3391 do_oop_store(_masm, field, rax); 3392 if (!is_static && rc == may_rewrite) { 3393 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no); 3394 } 3395 __ jmp(Done); 3396 } else { 3397 __ pop(atos); 3398 if (is_static) { 3399 Label notFlattenable, notBuffered; 3400 __ test_field_is_not_flattenable(flags2, rscratch1, notFlattenable); 3401 __ null_check(rax); 3402 __ bind(notFlattenable); 3403 if (ValueTypesBufferMaxMemory > 0) { 3404 __ test_value_is_not_buffered(rax, rscratch1, notBuffered); 3405 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_heap_copy), 3406 rax, off, obj); 3407 __ jmp(Done); 3408 __ bind(notBuffered); 3409 } 3410 do_oop_store(_masm, field, rax); 3411 __ jmp(Done); 3412 } else { 3413 Label isFlattenable, isFlattened, notBuffered, notBuffered2, rewriteNotFlattenable, rewriteFlattenable; 3414 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable); 3415 // Not flattenable case, covers not flattenable values and objects 3416 pop_and_check_object(obj); 3417 // Store into the field 3418 if (ValueTypesBufferMaxMemory > 0) { 3419 __ test_value_is_not_buffered(rax, rscratch1, notBuffered); 3420 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_heap_copy), 3421 rax, off, obj); 3422 __ jmp(rewriteNotFlattenable); 3423 __ bind(notBuffered); 3424 } 3425 do_oop_store(_masm, field, rax); 3426 __ bind(rewriteNotFlattenable); 3427 if (rc == may_rewrite) { 3428 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no); 3429 } 3430 __ jmp(Done); 3431 // Implementation of the flattenable semantic 3432 __ bind(isFlattenable); 3433 __ null_check(rax); 3434 __ test_field_is_flattened(flags2, rscratch1, isFlattened); 3435 // Not flattened case 3436 if (ValueTypesBufferMaxMemory > 0) { 3437 __ test_value_is_not_buffered(rax, rscratch1, notBuffered2); 3438 pop_and_check_object(obj); 3439 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_heap_copy), 3440 rax, off, obj); 3441 __ jmp(rewriteFlattenable); 3442 __ bind(notBuffered2); 3443 } 3444 pop_and_check_object(obj); 3445 // Store into the field 3446 do_oop_store(_masm, field, rax); 3447 __ jmp(rewriteFlattenable); 3448 __ bind(isFlattened); 3449 pop_and_check_object(obj); 3450 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value), 3451 rax, off, obj); 3452 __ bind(rewriteFlattenable); 3453 if (rc == may_rewrite) { 3454 patch_bytecode(Bytecodes::_fast_qputfield, bc, rbx, true, byte_no); 3455 } 3456 __ jmp(Done); 3457 } 3458 } 3459 } 3460 3461 __ bind(notObj); 3462 __ cmpl(flags, itos); 3463 __ jcc(Assembler::notEqual, notInt); 3464 3465 // itos 3466 { 3467 __ pop(itos); 3468 if (!is_static) pop_and_check_object(obj); 3469 __ movl(field, rax); 3470 if (!is_static && rc == may_rewrite) { 3471 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no); 3472 } 3473 __ jmp(Done); 3474 } 3475 3476 __ bind(notInt); 3477 __ cmpl(flags, ctos); 3478 __ jcc(Assembler::notEqual, notChar); 3479 3480 // ctos 3481 { 3482 __ pop(ctos); 3483 if (!is_static) pop_and_check_object(obj); 3484 __ movw(field, rax); 3485 if (!is_static && rc == may_rewrite) { 3486 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no); 3487 } 3488 __ jmp(Done); 3489 } 3490 3491 __ bind(notChar); 3492 __ cmpl(flags, stos); 3493 __ jcc(Assembler::notEqual, notShort); 3494 3495 // stos 3496 { 3497 __ pop(stos); 3498 if (!is_static) pop_and_check_object(obj); 3499 __ movw(field, rax); 3500 if (!is_static && rc == may_rewrite) { 3501 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no); 3502 } 3503 __ jmp(Done); 3504 } 3505 3506 __ bind(notShort); 3507 __ cmpl(flags, ltos); 3508 __ jcc(Assembler::notEqual, notLong); 3509 3510 // ltos 3511 #ifdef _LP64 3512 { 3513 __ pop(ltos); 3514 if (!is_static) pop_and_check_object(obj); 3515 __ movq(field, rax); 3516 if (!is_static && rc == may_rewrite) { 3517 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no); 3518 } 3519 __ jmp(Done); 3520 } 3521 #else 3522 { 3523 Label notVolatileLong; 3524 __ testl(rdx, rdx); 3525 __ jcc(Assembler::zero, notVolatileLong); 3526 3527 __ pop(ltos); // overwrites rdx, do this after testing volatile. 3528 if (!is_static) pop_and_check_object(obj); 3529 3530 // Replace with real volatile test 3531 __ push(rdx); 3532 __ push(rax); // Must update atomically with FIST 3533 __ fild_d(Address(rsp,0)); // So load into FPU register 3534 __ fistp_d(field); // and put into memory atomically 3535 __ addptr(rsp, 2*wordSize); 3536 // volatile_barrier(); 3537 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3538 Assembler::StoreStore)); 3539 // Don't rewrite volatile version 3540 __ jmp(notVolatile); 3541 3542 __ bind(notVolatileLong); 3543 3544 __ pop(ltos); // overwrites rdx 3545 if (!is_static) pop_and_check_object(obj); 3546 __ movptr(hi, rdx); 3547 __ movptr(field, rax); 3548 // Don't rewrite to _fast_lputfield for potential volatile case. 3549 __ jmp(notVolatile); 3550 } 3551 #endif // _LP64 3552 3553 __ bind(notLong); 3554 __ cmpl(flags, ftos); 3555 __ jcc(Assembler::notEqual, notFloat); 3556 3557 // ftos 3558 { 3559 __ pop(ftos); 3560 if (!is_static) pop_and_check_object(obj); 3561 __ store_float(field); 3562 if (!is_static && rc == may_rewrite) { 3563 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no); 3564 } 3565 __ jmp(Done); 3566 } 3567 3568 __ bind(notFloat); 3569 #ifdef ASSERT 3570 __ cmpl(flags, dtos); 3571 __ jcc(Assembler::notEqual, notDouble); 3572 #endif 3573 3574 // dtos 3575 { 3576 __ pop(dtos); 3577 if (!is_static) pop_and_check_object(obj); 3578 __ store_double(field); 3579 if (!is_static && rc == may_rewrite) { 3580 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no); 3581 } 3582 } 3583 3584 #ifdef ASSERT 3585 __ jmp(Done); 3586 3587 __ bind(notDouble); 3588 __ stop("Bad state"); 3589 #endif 3590 3591 __ bind(Done); 3592 3593 __ shrl(flags2, ConstantPoolCacheEntry::is_volatile_shift); 3594 __ andl(flags2, 0x1); 3595 3596 // Check for volatile store 3597 __ testl(flags2, flags2); 3598 __ jcc(Assembler::zero, notVolatile); 3599 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3600 Assembler::StoreStore)); 3601 __ bind(notVolatile); 3602 } 3603 3604 void TemplateTable::putfield(int byte_no) { 3605 putfield_or_static(byte_no, false); 3606 } 3607 3608 void TemplateTable::nofast_putfield(int byte_no) { 3609 putfield_or_static(byte_no, false, may_not_rewrite); 3610 } 3611 3612 void TemplateTable::putstatic(int byte_no) { 3613 putfield_or_static(byte_no, true); 3614 } 3615 3616 void TemplateTable::jvmti_post_fast_field_mod() { 3617 3618 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 3619 3620 if (JvmtiExport::can_post_field_modification()) { 3621 // Check to see if a field modification watch has been set before 3622 // we take the time to call into the VM. 3623 Label L2; 3624 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 3625 __ testl(scratch, scratch); 3626 __ jcc(Assembler::zero, L2); 3627 __ pop_ptr(rbx); // copy the object pointer from tos 3628 __ verify_oop(rbx); 3629 __ push_ptr(rbx); // put the object pointer back on tos 3630 // Save tos values before call_VM() clobbers them. Since we have 3631 // to do it for every data type, we use the saved values as the 3632 // jvalue object. 3633 switch (bytecode()) { // load values into the jvalue object 3634 case Bytecodes::_fast_qputfield: //fall through 3635 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break; 3636 case Bytecodes::_fast_bputfield: // fall through 3637 case Bytecodes::_fast_zputfield: // fall through 3638 case Bytecodes::_fast_sputfield: // fall through 3639 case Bytecodes::_fast_cputfield: // fall through 3640 case Bytecodes::_fast_iputfield: __ push_i(rax); break; 3641 case Bytecodes::_fast_dputfield: __ push(dtos); break; 3642 case Bytecodes::_fast_fputfield: __ push(ftos); break; 3643 case Bytecodes::_fast_lputfield: __ push_l(rax); break; 3644 3645 default: 3646 ShouldNotReachHere(); 3647 } 3648 __ mov(scratch, rsp); // points to jvalue on the stack 3649 // access constant pool cache entry 3650 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1)); 3651 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1)); 3652 __ verify_oop(rbx); 3653 // rbx: object pointer copied above 3654 // c_rarg2: cache entry pointer 3655 // c_rarg3: jvalue object on the stack 3656 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3)); 3657 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx)); 3658 3659 switch (bytecode()) { // restore tos values 3660 case Bytecodes::_fast_qputfield: // fall through 3661 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break; 3662 case Bytecodes::_fast_bputfield: // fall through 3663 case Bytecodes::_fast_zputfield: // fall through 3664 case Bytecodes::_fast_sputfield: // fall through 3665 case Bytecodes::_fast_cputfield: // fall through 3666 case Bytecodes::_fast_iputfield: __ pop_i(rax); break; 3667 case Bytecodes::_fast_dputfield: __ pop(dtos); break; 3668 case Bytecodes::_fast_fputfield: __ pop(ftos); break; 3669 case Bytecodes::_fast_lputfield: __ pop_l(rax); break; 3670 default: break; 3671 } 3672 __ bind(L2); 3673 } 3674 } 3675 3676 void TemplateTable::fast_storefield(TosState state) { 3677 transition(state, vtos); 3678 3679 ByteSize base = ConstantPoolCache::base_offset(); 3680 3681 jvmti_post_fast_field_mod(); 3682 3683 // access constant pool cache 3684 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 3685 3686 // test for volatile with rdx but rdx is tos register for lputfield. 3687 __ movl(rdx, Address(rcx, rbx, Address::times_ptr, 3688 in_bytes(base + 3689 ConstantPoolCacheEntry::flags_offset()))); 3690 3691 // replace index with field offset from cache entry 3692 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, 3693 in_bytes(base + ConstantPoolCacheEntry::f2_offset()))); 3694 3695 // [jk] not needed currently 3696 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 3697 // Assembler::StoreStore)); 3698 3699 if (bytecode() == Bytecodes::_fast_qputfield) { 3700 __ movl(rscratch2, rdx); 3701 } 3702 3703 Label notVolatile; 3704 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3705 __ andl(rdx, 0x1); 3706 3707 // Get object from stack 3708 pop_and_check_object(rcx); 3709 3710 // field address 3711 const Address field(rcx, rbx, Address::times_1); 3712 3713 // access field 3714 switch (bytecode()) { 3715 case Bytecodes::_fast_qputfield: 3716 { 3717 Label isFlattened, notBuffered, done; 3718 __ null_check(rax); 3719 __ test_field_is_flattened(rscratch2, rscratch1, isFlattened); 3720 // No Flattened case 3721 if (ValueTypesBufferMaxMemory > 0) { 3722 __ test_value_is_not_buffered(rax, rscratch1, notBuffered); 3723 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_heap_copy), 3724 rax, rbx, rcx); 3725 __ jmp(done); 3726 __ bind(notBuffered); 3727 } 3728 do_oop_store(_masm, field, rax); 3729 __ jmp(done); 3730 __ bind(isFlattened); 3731 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value), 3732 rax, rbx, rcx); 3733 __ bind(done); 3734 } 3735 break; 3736 case Bytecodes::_fast_aputfield: 3737 { 3738 Label notBuffered, done; 3739 if (ValueTypesBufferMaxMemory > 0) { 3740 __ test_value_is_not_buffered(rax, rscratch1, notBuffered); 3741 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_heap_copy), 3742 rax, rbx, rcx); 3743 __ jmp(done); 3744 __ bind(notBuffered); 3745 } 3746 do_oop_store(_masm, field, rax); 3747 __ bind(done); 3748 } 3749 break; 3750 case Bytecodes::_fast_lputfield: 3751 #ifdef _LP64 3752 __ movq(field, rax); 3753 #else 3754 __ stop("should not be rewritten"); 3755 #endif 3756 break; 3757 case Bytecodes::_fast_iputfield: 3758 __ movl(field, rax); 3759 break; 3760 case Bytecodes::_fast_zputfield: 3761 __ andl(rax, 0x1); // boolean is true if LSB is 1 3762 // fall through to bputfield 3763 case Bytecodes::_fast_bputfield: 3764 __ movb(field, rax); 3765 break; 3766 case Bytecodes::_fast_sputfield: 3767 // fall through 3768 case Bytecodes::_fast_cputfield: 3769 __ movw(field, rax); 3770 break; 3771 case Bytecodes::_fast_fputfield: 3772 __ store_float(field); 3773 break; 3774 case Bytecodes::_fast_dputfield: 3775 __ store_double(field); 3776 break; 3777 default: 3778 ShouldNotReachHere(); 3779 } 3780 3781 // Check for volatile store 3782 __ testl(rdx, rdx); 3783 __ jcc(Assembler::zero, notVolatile); 3784 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 3785 Assembler::StoreStore)); 3786 __ bind(notVolatile); 3787 } 3788 3789 void TemplateTable::fast_accessfield(TosState state) { 3790 transition(atos, state); 3791 3792 // Do the JVMTI work here to avoid disturbing the register state below 3793 if (JvmtiExport::can_post_field_access()) { 3794 // Check to see if a field access watch has been set before we 3795 // take the time to call into the VM. 3796 Label L1; 3797 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 3798 __ testl(rcx, rcx); 3799 __ jcc(Assembler::zero, L1); 3800 // access constant pool cache entry 3801 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1)); 3802 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1)); 3803 __ verify_oop(rax); 3804 __ push_ptr(rax); // save object pointer before call_VM() clobbers it 3805 LP64_ONLY(__ mov(c_rarg1, rax)); 3806 // c_rarg1: object pointer copied above 3807 // c_rarg2: cache entry pointer 3808 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2)); 3809 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx)); 3810 __ pop_ptr(rax); // restore object pointer 3811 __ bind(L1); 3812 } 3813 3814 // access constant pool cache 3815 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 3816 // replace index with field offset from cache entry 3817 // [jk] not needed currently 3818 // if (os::is_MP()) { 3819 // __ movl(rdx, Address(rcx, rbx, Address::times_8, 3820 // in_bytes(ConstantPoolCache::base_offset() + 3821 // ConstantPoolCacheEntry::flags_offset()))); 3822 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3823 // __ andl(rdx, 0x1); 3824 // } 3825 __ movptr(rdx, Address(rcx, rbx, Address::times_ptr, 3826 in_bytes(ConstantPoolCache::base_offset() + 3827 ConstantPoolCacheEntry::f2_offset()))); 3828 3829 // rax: object 3830 __ verify_oop(rax); 3831 __ null_check(rax); 3832 Address field(rax, rdx, Address::times_1); 3833 3834 // access field 3835 switch (bytecode()) { 3836 case Bytecodes::_fast_qgetfield: 3837 { 3838 Label isFlattened, nonnull, Done; 3839 __ movptr(rscratch1, Address(rcx, rbx, Address::times_ptr, 3840 in_bytes(ConstantPoolCache::base_offset() + 3841 ConstantPoolCacheEntry::flags_offset()))); 3842 __ test_field_is_flattened(rscratch1, rscratch2, isFlattened); 3843 // Non-flattened field case 3844 __ movptr(rscratch1, rax); 3845 __ load_heap_oop(rax, field); 3846 __ testptr(rax, rax); 3847 __ jcc(Assembler::notZero, nonnull); 3848 __ movptr(rax, rscratch1); 3849 __ movl(rcx, Address(rcx, rbx, Address::times_ptr, 3850 in_bytes(ConstantPoolCache::base_offset() + 3851 ConstantPoolCacheEntry::flags_offset()))); 3852 __ andl(rcx, ConstantPoolCacheEntry::field_index_mask); 3853 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field), 3854 rax, rcx); 3855 __ bind(nonnull); 3856 __ verify_oop(rax); 3857 __ jmp(Done); 3858 __ bind(isFlattened); 3859 __ movl(rdx, Address(rcx, rbx, Address::times_ptr, 3860 in_bytes(ConstantPoolCache::base_offset() + 3861 ConstantPoolCacheEntry::flags_offset()))); 3862 __ andl(rdx, ConstantPoolCacheEntry::field_index_mask); 3863 __ movptr(rcx, Address(rcx, rbx, Address::times_ptr, 3864 in_bytes(ConstantPoolCache::base_offset() + 3865 ConstantPoolCacheEntry::f1_offset()))); 3866 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field), 3867 rax, rdx, rcx); 3868 __ verify_oop(rax); 3869 __ bind(Done); 3870 } 3871 break; 3872 case Bytecodes::_fast_agetfield: 3873 do_oop_load(_masm, field, rax); 3874 __ verify_oop(rax); 3875 break; 3876 case Bytecodes::_fast_lgetfield: 3877 #ifdef _LP64 3878 __ movq(rax, field); 3879 #else 3880 __ stop("should not be rewritten"); 3881 #endif 3882 break; 3883 case Bytecodes::_fast_igetfield: 3884 __ movl(rax, field); 3885 break; 3886 case Bytecodes::_fast_bgetfield: 3887 __ movsbl(rax, field); 3888 break; 3889 case Bytecodes::_fast_sgetfield: 3890 __ load_signed_short(rax, field); 3891 break; 3892 case Bytecodes::_fast_cgetfield: 3893 __ load_unsigned_short(rax, field); 3894 break; 3895 case Bytecodes::_fast_fgetfield: 3896 __ load_float(field); 3897 break; 3898 case Bytecodes::_fast_dgetfield: 3899 __ load_double(field); 3900 break; 3901 default: 3902 ShouldNotReachHere(); 3903 } 3904 // [jk] not needed currently 3905 // if (os::is_MP()) { 3906 // Label notVolatile; 3907 // __ testl(rdx, rdx); 3908 // __ jcc(Assembler::zero, notVolatile); 3909 // __ membar(Assembler::LoadLoad); 3910 // __ bind(notVolatile); 3911 //}; 3912 } 3913 3914 void TemplateTable::fast_xaccess(TosState state) { 3915 transition(vtos, state); 3916 3917 // get receiver 3918 __ movptr(rax, aaddress(0)); 3919 // access constant pool cache 3920 __ get_cache_and_index_at_bcp(rcx, rdx, 2); 3921 __ movptr(rbx, 3922 Address(rcx, rdx, Address::times_ptr, 3923 in_bytes(ConstantPoolCache::base_offset() + 3924 ConstantPoolCacheEntry::f2_offset()))); 3925 // make sure exception is reported in correct bcp range (getfield is 3926 // next instruction) 3927 __ increment(rbcp); 3928 __ null_check(rax); 3929 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize); 3930 switch (state) { 3931 case itos: 3932 __ movl(rax, field); 3933 break; 3934 case atos: 3935 do_oop_load(_masm, field, rax); 3936 __ verify_oop(rax); 3937 break; 3938 case ftos: 3939 __ load_float(field); 3940 break; 3941 default: 3942 ShouldNotReachHere(); 3943 } 3944 3945 // [jk] not needed currently 3946 // if (os::is_MP()) { 3947 // Label notVolatile; 3948 // __ movl(rdx, Address(rcx, rdx, Address::times_8, 3949 // in_bytes(ConstantPoolCache::base_offset() + 3950 // ConstantPoolCacheEntry::flags_offset()))); 3951 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); 3952 // __ testl(rdx, 0x1); 3953 // __ jcc(Assembler::zero, notVolatile); 3954 // __ membar(Assembler::LoadLoad); 3955 // __ bind(notVolatile); 3956 // } 3957 3958 __ decrement(rbcp); 3959 } 3960 3961 //----------------------------------------------------------------------------- 3962 // Calls 3963 3964 void TemplateTable::count_calls(Register method, Register temp) { 3965 // implemented elsewhere 3966 ShouldNotReachHere(); 3967 } 3968 3969 void TemplateTable::prepare_invoke(int byte_no, 3970 Register method, // linked method (or i-klass) 3971 Register index, // itable index, MethodType, etc. 3972 Register recv, // if caller wants to see it 3973 Register flags // if caller wants to test it 3974 ) { 3975 // determine flags 3976 const Bytecodes::Code code = bytecode(); 3977 const bool is_invokeinterface = code == Bytecodes::_invokeinterface; 3978 const bool is_invokedynamic = code == Bytecodes::_invokedynamic; 3979 const bool is_invokehandle = code == Bytecodes::_invokehandle; 3980 const bool is_invokevirtual = code == Bytecodes::_invokevirtual; 3981 const bool is_invokespecial = code == Bytecodes::_invokespecial; 3982 const bool load_receiver = (recv != noreg); 3983 const bool save_flags = (flags != noreg); 3984 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), ""); 3985 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal"); 3986 assert(flags == noreg || flags == rdx, ""); 3987 assert(recv == noreg || recv == rcx, ""); 3988 3989 // setup registers & access constant pool cache 3990 if (recv == noreg) recv = rcx; 3991 if (flags == noreg) flags = rdx; 3992 assert_different_registers(method, index, recv, flags); 3993 3994 // save 'interpreter return address' 3995 __ save_bcp(); 3996 3997 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic); 3998 3999 // maybe push appendix to arguments (just before return address) 4000 if (is_invokedynamic || is_invokehandle) { 4001 Label L_no_push; 4002 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift)); 4003 __ jcc(Assembler::zero, L_no_push); 4004 // Push the appendix as a trailing parameter. 4005 // This must be done before we get the receiver, 4006 // since the parameter_size includes it. 4007 __ push(rbx); 4008 __ mov(rbx, index); 4009 assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0"); 4010 __ load_resolved_reference_at_index(index, rbx); 4011 __ pop(rbx); 4012 __ push(index); // push appendix (MethodType, CallSite, etc.) 4013 __ bind(L_no_push); 4014 } 4015 4016 // load receiver if needed (after appendix is pushed so parameter size is correct) 4017 // Note: no return address pushed yet 4018 if (load_receiver) { 4019 __ movl(recv, flags); 4020 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask); 4021 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address 4022 const int receiver_is_at_end = -1; // back off one slot to get receiver 4023 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end); 4024 __ movptr(recv, recv_addr); 4025 __ verify_oop(recv); 4026 } 4027 4028 if (save_flags) { 4029 __ movl(rbcp, flags); 4030 } 4031 4032 // compute return type 4033 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); 4034 // Make sure we don't need to mask flags after the above shift 4035 ConstantPoolCacheEntry::verify_tos_state_shift(); 4036 // load return address 4037 { 4038 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code); 4039 ExternalAddress table(table_addr); 4040 LP64_ONLY(__ lea(rscratch1, table)); 4041 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr))); 4042 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr)))); 4043 } 4044 4045 // push return address 4046 __ push(flags); 4047 4048 // Restore flags value from the constant pool cache, and restore rsi 4049 // for later null checks. r13 is the bytecode pointer 4050 if (save_flags) { 4051 __ movl(flags, rbcp); 4052 __ restore_bcp(); 4053 } 4054 } 4055 4056 void TemplateTable::invokevirtual_helper(Register index, 4057 Register recv, 4058 Register flags) { 4059 // Uses temporary registers rax, rdx 4060 assert_different_registers(index, recv, rax, rdx); 4061 assert(index == rbx, ""); 4062 assert(recv == rcx, ""); 4063 4064 // Test for an invoke of a final method 4065 Label notFinal; 4066 __ movl(rax, flags); 4067 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift)); 4068 __ jcc(Assembler::zero, notFinal); 4069 4070 const Register method = index; // method must be rbx 4071 assert(method == rbx, 4072 "Method* must be rbx for interpreter calling convention"); 4073 4074 // do the call - the index is actually the method to call 4075 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method* 4076 4077 // It's final, need a null check here! 4078 __ null_check(recv); 4079 4080 // profile this call 4081 __ profile_final_call(rax); 4082 __ profile_arguments_type(rax, method, rbcp, true); 4083 4084 __ jump_from_interpreted(method, rax); 4085 4086 __ bind(notFinal); 4087 4088 // get receiver klass 4089 __ null_check(recv, oopDesc::klass_offset_in_bytes()); 4090 __ load_klass(rax, recv); 4091 4092 // profile this call 4093 __ profile_virtual_call(rax, rlocals, rdx); 4094 // get target Method* & entry point 4095 __ lookup_virtual_method(rax, index, method); 4096 __ profile_called_method(method, rdx, rbcp); 4097 4098 __ profile_arguments_type(rdx, method, rbcp, true); 4099 __ jump_from_interpreted(method, rdx); 4100 } 4101 4102 void TemplateTable::invokevirtual(int byte_no) { 4103 transition(vtos, vtos); 4104 assert(byte_no == f2_byte, "use this argument"); 4105 prepare_invoke(byte_no, 4106 rbx, // method or vtable index 4107 noreg, // unused itable index 4108 rcx, rdx); // recv, flags 4109 4110 // rbx: index 4111 // rcx: receiver 4112 // rdx: flags 4113 4114 invokevirtual_helper(rbx, rcx, rdx); 4115 } 4116 4117 void TemplateTable::invokespecial(int byte_no) { 4118 transition(vtos, vtos); 4119 assert(byte_no == f1_byte, "use this argument"); 4120 prepare_invoke(byte_no, rbx, noreg, // get f1 Method* 4121 rcx); // get receiver also for null check 4122 __ verify_oop(rcx); 4123 __ null_check(rcx); 4124 // do the call 4125 __ profile_call(rax); 4126 __ profile_arguments_type(rax, rbx, rbcp, false); 4127 __ jump_from_interpreted(rbx, rax); 4128 } 4129 4130 void TemplateTable::invokestatic(int byte_no) { 4131 transition(vtos, vtos); 4132 assert(byte_no == f1_byte, "use this argument"); 4133 prepare_invoke(byte_no, rbx); // get f1 Method* 4134 // do the call 4135 __ profile_call(rax); 4136 __ profile_arguments_type(rax, rbx, rbcp, false); 4137 __ jump_from_interpreted(rbx, rax); 4138 } 4139 4140 4141 void TemplateTable::fast_invokevfinal(int byte_no) { 4142 transition(vtos, vtos); 4143 assert(byte_no == f2_byte, "use this argument"); 4144 __ stop("fast_invokevfinal not used on x86"); 4145 } 4146 4147 4148 void TemplateTable::invokeinterface(int byte_no) { 4149 transition(vtos, vtos); 4150 assert(byte_no == f1_byte, "use this argument"); 4151 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 Method* 4152 rcx, rdx); // recv, flags 4153 4154 // rax: reference klass (from f1) 4155 // rbx: method (from f2) 4156 // rcx: receiver 4157 // rdx: flags 4158 4159 // Special case of invokeinterface called for virtual method of 4160 // java.lang.Object. See cpCacheOop.cpp for details. 4161 // This code isn't produced by javac, but could be produced by 4162 // another compliant java compiler. 4163 Label notMethod; 4164 __ movl(rlocals, rdx); 4165 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift)); 4166 4167 __ jcc(Assembler::zero, notMethod); 4168 4169 invokevirtual_helper(rbx, rcx, rdx); 4170 __ bind(notMethod); 4171 4172 // Get receiver klass into rdx - also a null check 4173 __ restore_locals(); // restore r14 4174 __ null_check(rcx, oopDesc::klass_offset_in_bytes()); 4175 __ load_klass(rdx, rcx); 4176 4177 Label no_such_interface, no_such_method; 4178 4179 // Preserve method for throw_AbstractMethodErrorVerbose. 4180 __ mov(rcx, rbx); 4181 // Receiver subtype check against REFC. 4182 // Superklass in rax. Subklass in rdx. Blows rcx, rdi. 4183 __ lookup_interface_method(// inputs: rec. class, interface, itable index 4184 rdx, rax, noreg, 4185 // outputs: scan temp. reg, scan temp. reg 4186 rbcp, rlocals, 4187 no_such_interface, 4188 /*return_method=*/false); 4189 4190 // profile this call 4191 __ restore_bcp(); // rbcp was destroyed by receiver type check 4192 __ profile_virtual_call(rdx, rbcp, rlocals); 4193 4194 // Get declaring interface class from method, and itable index 4195 __ movptr(rax, Address(rbx, Method::const_offset())); 4196 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); 4197 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes())); 4198 __ movl(rbx, Address(rbx, Method::itable_index_offset())); 4199 __ subl(rbx, Method::itable_index_max); 4200 __ negl(rbx); 4201 4202 // Preserve recvKlass for throw_AbstractMethodErrorVerbose. 4203 __ mov(rlocals, rdx); 4204 __ lookup_interface_method(// inputs: rec. class, interface, itable index 4205 rlocals, rax, rbx, 4206 // outputs: method, scan temp. reg 4207 rbx, rbcp, 4208 no_such_interface); 4209 4210 // rbx: Method* to call 4211 // rcx: receiver 4212 // Check for abstract method error 4213 // Note: This should be done more efficiently via a throw_abstract_method_error 4214 // interpreter entry point and a conditional jump to it in case of a null 4215 // method. 4216 __ testptr(rbx, rbx); 4217 __ jcc(Assembler::zero, no_such_method); 4218 4219 __ profile_called_method(rbx, rbcp, rdx); 4220 __ profile_arguments_type(rdx, rbx, rbcp, true); 4221 4222 // do the call 4223 // rcx: receiver 4224 // rbx,: Method* 4225 __ jump_from_interpreted(rbx, rdx); 4226 __ should_not_reach_here(); 4227 4228 // exception handling code follows... 4229 // note: must restore interpreter registers to canonical 4230 // state for exception handling to work correctly! 4231 4232 __ bind(no_such_method); 4233 // throw exception 4234 __ pop(rbx); // pop return address (pushed by prepare_invoke) 4235 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed) 4236 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 4237 // Pass arguments for generating a verbose error message. 4238 #ifdef _LP64 4239 Register recvKlass = c_rarg1; 4240 Register method = c_rarg2; 4241 if (recvKlass != rdx) { __ movq(recvKlass, rdx); } 4242 if (method != rcx) { __ movq(method, rcx); } 4243 #else 4244 Register recvKlass = rdx; 4245 Register method = rcx; 4246 #endif 4247 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose), 4248 recvKlass, method); 4249 // The call_VM checks for exception, so we should never return here. 4250 __ should_not_reach_here(); 4251 4252 __ bind(no_such_interface); 4253 // throw exception 4254 __ pop(rbx); // pop return address (pushed by prepare_invoke) 4255 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed) 4256 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 4257 // Pass arguments for generating a verbose error message. 4258 LP64_ONLY( if (recvKlass != rdx) { __ movq(recvKlass, rdx); } ) 4259 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose), 4260 recvKlass, rax); 4261 // the call_VM checks for exception, so we should never return here. 4262 __ should_not_reach_here(); 4263 } 4264 4265 void TemplateTable::invokehandle(int byte_no) { 4266 transition(vtos, vtos); 4267 assert(byte_no == f1_byte, "use this argument"); 4268 const Register rbx_method = rbx; 4269 const Register rax_mtype = rax; 4270 const Register rcx_recv = rcx; 4271 const Register rdx_flags = rdx; 4272 4273 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv); 4274 __ verify_method_ptr(rbx_method); 4275 __ verify_oop(rcx_recv); 4276 __ null_check(rcx_recv); 4277 4278 // rax: MethodType object (from cpool->resolved_references[f1], if necessary) 4279 // rbx: MH.invokeExact_MT method (from f2) 4280 4281 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke 4282 4283 // FIXME: profile the LambdaForm also 4284 __ profile_final_call(rax); 4285 __ profile_arguments_type(rdx, rbx_method, rbcp, true); 4286 4287 __ jump_from_interpreted(rbx_method, rdx); 4288 } 4289 4290 void TemplateTable::invokedynamic(int byte_no) { 4291 transition(vtos, vtos); 4292 assert(byte_no == f1_byte, "use this argument"); 4293 4294 const Register rbx_method = rbx; 4295 const Register rax_callsite = rax; 4296 4297 prepare_invoke(byte_no, rbx_method, rax_callsite); 4298 4299 // rax: CallSite object (from cpool->resolved_references[f1]) 4300 // rbx: MH.linkToCallSite method (from f2) 4301 4302 // Note: rax_callsite is already pushed by prepare_invoke 4303 4304 // %%% should make a type profile for any invokedynamic that takes a ref argument 4305 // profile this call 4306 __ profile_call(rbcp); 4307 __ profile_arguments_type(rdx, rbx_method, rbcp, false); 4308 4309 __ verify_oop(rax_callsite); 4310 4311 __ jump_from_interpreted(rbx_method, rdx); 4312 } 4313 4314 //----------------------------------------------------------------------------- 4315 // Allocation 4316 4317 void TemplateTable::_new() { 4318 transition(vtos, atos); 4319 __ get_unsigned_2_byte_index_at_bcp(rdx, 1); 4320 Label slow_case; 4321 Label slow_case_no_pop; 4322 Label done; 4323 Label initialize_header; 4324 Label initialize_object; // including clearing the fields 4325 4326 __ get_cpool_and_tags(rcx, rax); 4327 4328 // Make sure the class we're about to instantiate has been resolved. 4329 // This is done before loading InstanceKlass to be consistent with the order 4330 // how Constant Pool is updated (see ConstantPool::klass_at_put) 4331 const int tags_offset = Array<u1>::base_offset_in_bytes(); 4332 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class); 4333 __ jcc(Assembler::notEqual, slow_case_no_pop); 4334 4335 // get InstanceKlass 4336 __ load_resolved_klass_at_index(rcx, rdx, rcx); 4337 __ push(rcx); // save the contexts of klass for initializing the header 4338 4339 // make sure klass is initialized & doesn't have finalizer 4340 // make sure klass is fully initialized 4341 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized); 4342 __ jcc(Assembler::notEqual, slow_case); 4343 4344 // get instance_size in InstanceKlass (scaled to a count of bytes) 4345 __ movl(rdx, Address(rcx, Klass::layout_helper_offset())); 4346 // test to see if it has a finalizer or is malformed in some way 4347 __ testl(rdx, Klass::_lh_instance_slow_path_bit); 4348 __ jcc(Assembler::notZero, slow_case); 4349 4350 // Allocate the instance: 4351 // If TLAB is enabled: 4352 // Try to allocate in the TLAB. 4353 // If fails, go to the slow path. 4354 // Else If inline contiguous allocations are enabled: 4355 // Try to allocate in eden. 4356 // If fails due to heap end, go to slow path. 4357 // 4358 // If TLAB is enabled OR inline contiguous is enabled: 4359 // Initialize the allocation. 4360 // Exit. 4361 // 4362 // Go to slow path. 4363 4364 const bool allow_shared_alloc = 4365 Universe::heap()->supports_inline_contig_alloc(); 4366 4367 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 4368 #ifndef _LP64 4369 if (UseTLAB || allow_shared_alloc) { 4370 __ get_thread(thread); 4371 } 4372 #endif // _LP64 4373 4374 if (UseTLAB) { 4375 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset()))); 4376 __ lea(rbx, Address(rax, rdx, Address::times_1)); 4377 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset()))); 4378 __ jcc(Assembler::above, slow_case); 4379 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx); 4380 if (ZeroTLAB) { 4381 // the fields have been already cleared 4382 __ jmp(initialize_header); 4383 } else { 4384 // initialize both the header and fields 4385 __ jmp(initialize_object); 4386 } 4387 } else { 4388 // Allocation in the shared Eden, if allowed. 4389 // 4390 // rdx: instance size in bytes 4391 if (allow_shared_alloc) { 4392 ExternalAddress heap_top((address)Universe::heap()->top_addr()); 4393 ExternalAddress heap_end((address)Universe::heap()->end_addr()); 4394 4395 Label retry; 4396 __ bind(retry); 4397 __ movptr(rax, heap_top); 4398 __ lea(rbx, Address(rax, rdx, Address::times_1)); 4399 __ cmpptr(rbx, heap_end); 4400 __ jcc(Assembler::above, slow_case); 4401 4402 // Compare rax, with the top addr, and if still equal, store the new 4403 // top addr in rbx, at the address of the top addr pointer. Sets ZF if was 4404 // equal, and clears it otherwise. Use lock prefix for atomicity on MPs. 4405 // 4406 // rax,: object begin 4407 // rbx,: object end 4408 // rdx: instance size in bytes 4409 __ locked_cmpxchgptr(rbx, heap_top); 4410 4411 // if someone beat us on the allocation, try again, otherwise continue 4412 __ jcc(Assembler::notEqual, retry); 4413 4414 __ incr_allocated_bytes(thread, rdx, 0); 4415 } 4416 } 4417 4418 // If UseTLAB or allow_shared_alloc are true, the object is created above and 4419 // there is an initialize need. Otherwise, skip and go to the slow path. 4420 if (UseTLAB || allow_shared_alloc) { 4421 // The object is initialized before the header. If the object size is 4422 // zero, go directly to the header initialization. 4423 __ bind(initialize_object); 4424 __ decrement(rdx, sizeof(oopDesc)); 4425 __ jcc(Assembler::zero, initialize_header); 4426 4427 // Initialize topmost object field, divide rdx by 8, check if odd and 4428 // test if zero. 4429 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) 4430 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd 4431 4432 // rdx must have been multiple of 8 4433 #ifdef ASSERT 4434 // make sure rdx was multiple of 8 4435 Label L; 4436 // Ignore partial flag stall after shrl() since it is debug VM 4437 __ jccb(Assembler::carryClear, L); 4438 __ stop("object size is not multiple of 2 - adjust this code"); 4439 __ bind(L); 4440 // rdx must be > 0, no extra check needed here 4441 #endif 4442 4443 // initialize remaining object fields: rdx was a multiple of 8 4444 { Label loop; 4445 __ bind(loop); 4446 __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx); 4447 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx)); 4448 __ decrement(rdx); 4449 __ jcc(Assembler::notZero, loop); 4450 } 4451 4452 // initialize object header only. 4453 __ bind(initialize_header); 4454 if (UseBiasedLocking) { 4455 __ pop(rcx); // get saved klass back in the register. 4456 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset())); 4457 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx); 4458 } else { 4459 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), 4460 (intptr_t)markOopDesc::prototype()); // header 4461 __ pop(rcx); // get saved klass back in the register. 4462 } 4463 #ifdef _LP64 4464 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code) 4465 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops 4466 #endif 4467 __ store_klass(rax, rcx); // klass 4468 4469 { 4470 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0); 4471 // Trigger dtrace event for fastpath 4472 __ push(atos); 4473 __ call_VM_leaf( 4474 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax); 4475 __ pop(atos); 4476 } 4477 4478 __ jmp(done); 4479 } 4480 4481 // slow case 4482 __ bind(slow_case); 4483 __ pop(rcx); // restore stack pointer to what it was when we came in. 4484 __ bind(slow_case_no_pop); 4485 4486 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax); 4487 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 4488 4489 __ get_constant_pool(rarg1); 4490 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4491 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2); 4492 __ verify_oop(rax); 4493 4494 // continue 4495 __ bind(done); 4496 } 4497 4498 void TemplateTable::defaultvalue() { 4499 transition(vtos, atos); 4500 4501 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4502 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 4503 4504 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4505 __ get_constant_pool(rarg1); 4506 4507 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::defaultvalue), 4508 rarg1, rarg2); 4509 __ verify_oop(rax); 4510 } 4511 4512 void TemplateTable::newarray() { 4513 transition(itos, atos); 4514 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4515 __ load_unsigned_byte(rarg1, at_bcp(1)); 4516 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), 4517 rarg1, rax); 4518 } 4519 4520 void TemplateTable::anewarray() { 4521 transition(itos, atos); 4522 4523 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4524 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 4525 4526 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1); 4527 __ get_constant_pool(rarg1); 4528 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), 4529 rarg1, rarg2, rax); 4530 } 4531 4532 void TemplateTable::arraylength() { 4533 transition(atos, itos); 4534 __ null_check(rax, arrayOopDesc::length_offset_in_bytes()); 4535 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes())); 4536 } 4537 4538 void TemplateTable::checkcast() { 4539 transition(atos, atos); 4540 Label done, is_null, ok_is_subtype, quicked, resolved; 4541 __ testptr(rax, rax); // object is in rax 4542 __ jcc(Assembler::zero, is_null); 4543 4544 // Get cpool & tags index 4545 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 4546 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 4547 // See if bytecode has already been quicked 4548 __ cmpb(Address(rdx, rbx, 4549 Address::times_1, 4550 Array<u1>::base_offset_in_bytes()), 4551 JVM_CONSTANT_Class); 4552 __ jcc(Assembler::equal, quicked); 4553 __ push(atos); // save receiver for result, and for GC 4554 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4555 4556 // vm_result_2 has metadata result 4557 #ifndef _LP64 4558 // borrow rdi from locals 4559 __ get_thread(rdi); 4560 __ get_vm_result_2(rax, rdi); 4561 __ restore_locals(); 4562 #else 4563 __ get_vm_result_2(rax, r15_thread); 4564 #endif 4565 4566 __ pop_ptr(rdx); // restore receiver 4567 __ jmpb(resolved); 4568 4569 // Get superklass in rax and subklass in rbx 4570 __ bind(quicked); 4571 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check 4572 __ load_resolved_klass_at_index(rcx, rbx, rax); 4573 4574 __ bind(resolved); 4575 __ load_klass(rbx, rdx); 4576 4577 // Generate subtype check. Blows rcx, rdi. Object in rdx. 4578 // Superklass in rax. Subklass in rbx. 4579 __ gen_subtype_check(rbx, ok_is_subtype); 4580 4581 // Come here on failure 4582 __ push_ptr(rdx); 4583 // object is at TOS 4584 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry)); 4585 4586 // Come here on success 4587 __ bind(ok_is_subtype); 4588 __ mov(rax, rdx); // Restore object in rdx 4589 4590 // Collect counts on whether this check-cast sees NULLs a lot or not. 4591 if (ProfileInterpreter) { 4592 __ jmp(done); 4593 __ bind(is_null); 4594 __ profile_null_seen(rcx); 4595 } else { 4596 __ bind(is_null); // same as 'done' 4597 } 4598 __ bind(done); 4599 } 4600 4601 void TemplateTable::instanceof() { 4602 transition(atos, itos); 4603 Label done, is_null, ok_is_subtype, quicked, resolved; 4604 __ testptr(rax, rax); 4605 __ jcc(Assembler::zero, is_null); 4606 4607 // Get cpool & tags index 4608 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 4609 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 4610 // See if bytecode has already been quicked 4611 __ cmpb(Address(rdx, rbx, 4612 Address::times_1, 4613 Array<u1>::base_offset_in_bytes()), 4614 JVM_CONSTANT_Class); 4615 __ jcc(Assembler::equal, quicked); 4616 4617 __ push(atos); // save receiver for result, and for GC 4618 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4619 // vm_result_2 has metadata result 4620 4621 #ifndef _LP64 4622 // borrow rdi from locals 4623 __ get_thread(rdi); 4624 __ get_vm_result_2(rax, rdi); 4625 __ restore_locals(); 4626 #else 4627 __ get_vm_result_2(rax, r15_thread); 4628 #endif 4629 4630 __ pop_ptr(rdx); // restore receiver 4631 __ verify_oop(rdx); 4632 __ load_klass(rdx, rdx); 4633 __ jmpb(resolved); 4634 4635 // Get superklass in rax and subklass in rdx 4636 __ bind(quicked); 4637 __ load_klass(rdx, rax); 4638 __ load_resolved_klass_at_index(rcx, rbx, rax); 4639 4640 __ bind(resolved); 4641 4642 // Generate subtype check. Blows rcx, rdi 4643 // Superklass in rax. Subklass in rdx. 4644 __ gen_subtype_check(rdx, ok_is_subtype); 4645 4646 // Come here on failure 4647 __ xorl(rax, rax); 4648 __ jmpb(done); 4649 // Come here on success 4650 __ bind(ok_is_subtype); 4651 __ movl(rax, 1); 4652 4653 // Collect counts on whether this test sees NULLs a lot or not. 4654 if (ProfileInterpreter) { 4655 __ jmp(done); 4656 __ bind(is_null); 4657 __ profile_null_seen(rcx); 4658 } else { 4659 __ bind(is_null); // same as 'done' 4660 } 4661 __ bind(done); 4662 // rax = 0: obj == NULL or obj is not an instanceof the specified klass 4663 // rax = 1: obj != NULL and obj is an instanceof the specified klass 4664 } 4665 4666 //---------------------------------------------------------------------------------------------------- 4667 // Breakpoints 4668 void TemplateTable::_breakpoint() { 4669 // Note: We get here even if we are single stepping.. 4670 // jbug insists on setting breakpoints at every bytecode 4671 // even if we are in single step mode. 4672 4673 transition(vtos, vtos); 4674 4675 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 4676 4677 // get the unpatched byte code 4678 __ get_method(rarg); 4679 __ call_VM(noreg, 4680 CAST_FROM_FN_PTR(address, 4681 InterpreterRuntime::get_original_bytecode_at), 4682 rarg, rbcp); 4683 __ mov(rbx, rax); // why? 4684 4685 // post the breakpoint event 4686 __ get_method(rarg); 4687 __ call_VM(noreg, 4688 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), 4689 rarg, rbcp); 4690 4691 // complete the execution of original bytecode 4692 __ dispatch_only_normal(vtos); 4693 } 4694 4695 //----------------------------------------------------------------------------- 4696 // Exceptions 4697 4698 void TemplateTable::athrow() { 4699 transition(atos, vtos); 4700 __ null_check(rax); 4701 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 4702 } 4703 4704 //----------------------------------------------------------------------------- 4705 // Synchronization 4706 // 4707 // Note: monitorenter & exit are symmetric routines; which is reflected 4708 // in the assembly code structure as well 4709 // 4710 // Stack layout: 4711 // 4712 // [expressions ] <--- rsp = expression stack top 4713 // .. 4714 // [expressions ] 4715 // [monitor entry] <--- monitor block top = expression stack bot 4716 // .. 4717 // [monitor entry] 4718 // [frame data ] <--- monitor block bot 4719 // ... 4720 // [saved rbp ] <--- rbp 4721 void TemplateTable::monitorenter() { 4722 transition(atos, vtos); 4723 4724 // check for NULL object 4725 __ null_check(rax); 4726 4727 const Address monitor_block_top( 4728 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4729 const Address monitor_block_bot( 4730 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 4731 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4732 4733 Label allocated; 4734 4735 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 4736 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx); 4737 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4738 4739 // initialize entry pointer 4740 __ xorl(rmon, rmon); // points to free slot or NULL 4741 4742 // find a free slot in the monitor block (result in rmon) 4743 { 4744 Label entry, loop, exit; 4745 __ movptr(rtop, monitor_block_top); // points to current entry, 4746 // starting with top-most entry 4747 __ lea(rbot, monitor_block_bot); // points to word before bottom 4748 // of monitor block 4749 __ jmpb(entry); 4750 4751 __ bind(loop); 4752 // check if current entry is used 4753 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD); 4754 // if not used then remember entry in rmon 4755 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr 4756 // check if current entry is for same object 4757 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes())); 4758 // if same object then stop searching 4759 __ jccb(Assembler::equal, exit); 4760 // otherwise advance to next entry 4761 __ addptr(rtop, entry_size); 4762 __ bind(entry); 4763 // check if bottom reached 4764 __ cmpptr(rtop, rbot); 4765 // if not at bottom then check this entry 4766 __ jcc(Assembler::notEqual, loop); 4767 __ bind(exit); 4768 } 4769 4770 __ testptr(rmon, rmon); // check if a slot has been found 4771 __ jcc(Assembler::notZero, allocated); // if found, continue with that one 4772 4773 // allocate one if there's no free slot 4774 { 4775 Label entry, loop; 4776 // 1. compute new pointers // rsp: old expression stack top 4777 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom 4778 __ subptr(rsp, entry_size); // move expression stack top 4779 __ subptr(rmon, entry_size); // move expression stack bottom 4780 __ mov(rtop, rsp); // set start value for copy loop 4781 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom 4782 __ jmp(entry); 4783 // 2. move expression stack contents 4784 __ bind(loop); 4785 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack 4786 // word from old location 4787 __ movptr(Address(rtop, 0), rbot); // and store it at new location 4788 __ addptr(rtop, wordSize); // advance to next word 4789 __ bind(entry); 4790 __ cmpptr(rtop, rmon); // check if bottom reached 4791 __ jcc(Assembler::notEqual, loop); // if not at bottom then 4792 // copy next word 4793 } 4794 4795 // call run-time routine 4796 // rmon: points to monitor entry 4797 __ bind(allocated); 4798 4799 // Increment bcp to point to the next bytecode, so exception 4800 // handling for async. exceptions work correctly. 4801 // The object has already been poped from the stack, so the 4802 // expression stack looks correct. 4803 __ increment(rbcp); 4804 4805 // store object 4806 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax); 4807 __ lock_object(rmon); 4808 4809 // check to make sure this monitor doesn't cause stack overflow after locking 4810 __ save_bcp(); // in case of exception 4811 __ generate_stack_overflow_check(0); 4812 4813 // The bcp has already been incremented. Just need to dispatch to 4814 // next instruction. 4815 __ dispatch_next(vtos); 4816 } 4817 4818 void TemplateTable::monitorexit() { 4819 transition(atos, vtos); 4820 4821 // check for NULL object 4822 __ null_check(rax); 4823 4824 const Address monitor_block_top( 4825 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4826 const Address monitor_block_bot( 4827 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 4828 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4829 4830 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 4831 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx); 4832 4833 Label found; 4834 4835 // find matching slot 4836 { 4837 Label entry, loop; 4838 __ movptr(rtop, monitor_block_top); // points to current entry, 4839 // starting with top-most entry 4840 __ lea(rbot, monitor_block_bot); // points to word before bottom 4841 // of monitor block 4842 __ jmpb(entry); 4843 4844 __ bind(loop); 4845 // check if current entry is for same object 4846 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes())); 4847 // if same object then stop searching 4848 __ jcc(Assembler::equal, found); 4849 // otherwise advance to next entry 4850 __ addptr(rtop, entry_size); 4851 __ bind(entry); 4852 // check if bottom reached 4853 __ cmpptr(rtop, rbot); 4854 // if not at bottom then check this entry 4855 __ jcc(Assembler::notEqual, loop); 4856 } 4857 4858 // error handling. Unlocking was not block-structured 4859 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 4860 InterpreterRuntime::throw_illegal_monitor_state_exception)); 4861 __ should_not_reach_here(); 4862 4863 // call run-time routine 4864 __ bind(found); 4865 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps) 4866 __ unlock_object(rtop); 4867 __ pop_ptr(rax); // discard object 4868 } 4869 4870 // Wide instructions 4871 void TemplateTable::wide() { 4872 transition(vtos, vtos); 4873 __ load_unsigned_byte(rbx, at_bcp(1)); 4874 ExternalAddress wtable((address)Interpreter::_wentry_point); 4875 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr))); 4876 // Note: the rbcp increment step is part of the individual wide bytecode implementations 4877 } 4878 4879 // Multi arrays 4880 void TemplateTable::multianewarray() { 4881 transition(vtos, atos); 4882 4883 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax); 4884 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions 4885 // last dim is on top of stack; we want address of first one: 4886 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize 4887 // the latter wordSize to point to the beginning of the array. 4888 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize)); 4889 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg); 4890 __ load_unsigned_byte(rbx, at_bcp(3)); 4891 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts 4892 }