1 /* 2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "asm/macroAssembler.inline.hpp" 28 #include "gc/shared/barrierSetAssembler.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/interp_masm.hpp" 32 #include "interpreter/templateTable.hpp" 33 #include "memory/universe.hpp" 34 #include "oops/methodData.hpp" 35 #include "oops/method.hpp" 36 #include "oops/objArrayKlass.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/methodHandles.hpp" 39 #include "runtime/frame.inline.hpp" 40 #include "runtime/sharedRuntime.hpp" 41 #include "runtime/stubRoutines.hpp" 42 #include "runtime/synchronizer.hpp" 43 44 #define __ _masm-> 45 46 // Platform-dependent initialization 47 48 void TemplateTable::pd_initialize() { 49 // No aarch64 specific initialization 50 } 51 52 // Address computation: local variables 53 54 static inline Address iaddress(int n) { 55 return Address(rlocals, Interpreter::local_offset_in_bytes(n)); 56 } 57 58 static inline Address laddress(int n) { 59 return iaddress(n + 1); 60 } 61 62 static inline Address faddress(int n) { 63 return iaddress(n); 64 } 65 66 static inline Address daddress(int n) { 67 return laddress(n); 68 } 69 70 static inline Address aaddress(int n) { 71 return iaddress(n); 72 } 73 74 static inline Address iaddress(Register r) { 75 return Address(rlocals, r, Address::lsl(3)); 76 } 77 78 static inline Address laddress(Register r, Register scratch, 79 InterpreterMacroAssembler* _masm) { 80 __ lea(scratch, Address(rlocals, r, Address::lsl(3))); 81 return Address(scratch, Interpreter::local_offset_in_bytes(1)); 82 } 83 84 static inline Address faddress(Register r) { 85 return iaddress(r); 86 } 87 88 static inline Address daddress(Register r, Register scratch, 89 InterpreterMacroAssembler* _masm) { 90 return laddress(r, scratch, _masm); 91 } 92 93 static inline Address aaddress(Register r) { 94 return iaddress(r); 95 } 96 97 static inline Address at_rsp() { 98 return Address(esp, 0); 99 } 100 101 // At top of Java expression stack which may be different than esp(). It 102 // isn't for category 1 objects. 103 static inline Address at_tos () { 104 return Address(esp, Interpreter::expr_offset_in_bytes(0)); 105 } 106 107 static inline Address at_tos_p1() { 108 return Address(esp, Interpreter::expr_offset_in_bytes(1)); 109 } 110 111 static inline Address at_tos_p2() { 112 return Address(esp, Interpreter::expr_offset_in_bytes(2)); 113 } 114 115 static inline Address at_tos_p3() { 116 return Address(esp, Interpreter::expr_offset_in_bytes(3)); 117 } 118 119 static inline Address at_tos_p4() { 120 return Address(esp, Interpreter::expr_offset_in_bytes(4)); 121 } 122 123 static inline Address at_tos_p5() { 124 return Address(esp, Interpreter::expr_offset_in_bytes(5)); 125 } 126 127 // Condition conversion 128 static Assembler::Condition j_not(TemplateTable::Condition cc) { 129 switch (cc) { 130 case TemplateTable::equal : return Assembler::NE; 131 case TemplateTable::not_equal : return Assembler::EQ; 132 case TemplateTable::less : return Assembler::GE; 133 case TemplateTable::less_equal : return Assembler::GT; 134 case TemplateTable::greater : return Assembler::LE; 135 case TemplateTable::greater_equal: return Assembler::LT; 136 } 137 ShouldNotReachHere(); 138 return Assembler::EQ; 139 } 140 141 142 // Miscelaneous helper routines 143 // Store an oop (or NULL) at the Address described by obj. 144 // If val == noreg this means store a NULL 145 static void do_oop_store(InterpreterMacroAssembler* _masm, 146 Address dst, 147 Register val, 148 DecoratorSet decorators) { 149 assert(val == noreg || val == r0, "parameter is just for looks"); 150 __ store_heap_oop(dst, val, r10, r1, decorators); 151 } 152 153 static void do_oop_load(InterpreterMacroAssembler* _masm, 154 Address src, 155 Register dst, 156 DecoratorSet decorators) { 157 __ load_heap_oop(dst, src, r10, r1, decorators); 158 } 159 160 Address TemplateTable::at_bcp(int offset) { 161 assert(_desc->uses_bcp(), "inconsistent uses_bcp information"); 162 return Address(rbcp, offset); 163 } 164 165 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg, 166 Register temp_reg, bool load_bc_into_bc_reg/*=true*/, 167 int byte_no) 168 { 169 if (!RewriteBytecodes) return; 170 Label L_patch_done; 171 172 switch (bc) { 173 case Bytecodes::_fast_qputfield: 174 case Bytecodes::_fast_aputfield: 175 case Bytecodes::_fast_bputfield: 176 case Bytecodes::_fast_zputfield: 177 case Bytecodes::_fast_cputfield: 178 case Bytecodes::_fast_dputfield: 179 case Bytecodes::_fast_fputfield: 180 case Bytecodes::_fast_iputfield: 181 case Bytecodes::_fast_lputfield: 182 case Bytecodes::_fast_sputfield: 183 { 184 // We skip bytecode quickening for putfield instructions when 185 // the put_code written to the constant pool cache is zero. 186 // This is required so that every execution of this instruction 187 // calls out to InterpreterRuntime::resolve_get_put to do 188 // additional, required work. 189 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 190 assert(load_bc_into_bc_reg, "we use bc_reg as temp"); 191 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1); 192 __ movw(bc_reg, bc); 193 __ cbzw(temp_reg, L_patch_done); // don't patch 194 } 195 break; 196 default: 197 assert(byte_no == -1, "sanity"); 198 // the pair bytecodes have already done the load. 199 if (load_bc_into_bc_reg) { 200 __ movw(bc_reg, bc); 201 } 202 } 203 204 if (JvmtiExport::can_post_breakpoint()) { 205 Label L_fast_patch; 206 // if a breakpoint is present we can't rewrite the stream directly 207 __ load_unsigned_byte(temp_reg, at_bcp(0)); 208 __ cmpw(temp_reg, Bytecodes::_breakpoint); 209 __ br(Assembler::NE, L_fast_patch); 210 // Let breakpoint table handling rewrite to quicker bytecode 211 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), rmethod, rbcp, bc_reg); 212 __ b(L_patch_done); 213 __ bind(L_fast_patch); 214 } 215 216 #ifdef ASSERT 217 Label L_okay; 218 __ load_unsigned_byte(temp_reg, at_bcp(0)); 219 __ cmpw(temp_reg, (int) Bytecodes::java_code(bc)); 220 __ br(Assembler::EQ, L_okay); 221 __ cmpw(temp_reg, bc_reg); 222 __ br(Assembler::EQ, L_okay); 223 __ stop("patching the wrong bytecode"); 224 __ bind(L_okay); 225 #endif 226 227 // patch bytecode 228 __ strb(bc_reg, at_bcp(0)); 229 __ bind(L_patch_done); 230 } 231 232 233 // Individual instructions 234 235 void TemplateTable::nop() { 236 transition(vtos, vtos); 237 // nothing to do 238 } 239 240 void TemplateTable::shouldnotreachhere() { 241 transition(vtos, vtos); 242 __ stop("shouldnotreachhere bytecode"); 243 } 244 245 void TemplateTable::aconst_null() 246 { 247 transition(vtos, atos); 248 __ mov(r0, 0); 249 } 250 251 void TemplateTable::iconst(int value) 252 { 253 transition(vtos, itos); 254 __ mov(r0, value); 255 } 256 257 void TemplateTable::lconst(int value) 258 { 259 __ mov(r0, value); 260 } 261 262 void TemplateTable::fconst(int value) 263 { 264 transition(vtos, ftos); 265 switch (value) { 266 case 0: 267 __ fmovs(v0, zr); 268 break; 269 case 1: 270 __ fmovs(v0, 1.0); 271 break; 272 case 2: 273 __ fmovs(v0, 2.0); 274 break; 275 default: 276 ShouldNotReachHere(); 277 break; 278 } 279 } 280 281 void TemplateTable::dconst(int value) 282 { 283 transition(vtos, dtos); 284 switch (value) { 285 case 0: 286 __ fmovd(v0, zr); 287 break; 288 case 1: 289 __ fmovd(v0, 1.0); 290 break; 291 case 2: 292 __ fmovd(v0, 2.0); 293 break; 294 default: 295 ShouldNotReachHere(); 296 break; 297 } 298 } 299 300 void TemplateTable::bipush() 301 { 302 transition(vtos, itos); 303 __ load_signed_byte32(r0, at_bcp(1)); 304 } 305 306 void TemplateTable::sipush() 307 { 308 transition(vtos, itos); 309 __ load_unsigned_short(r0, at_bcp(1)); 310 __ revw(r0, r0); 311 __ asrw(r0, r0, 16); 312 } 313 314 void TemplateTable::ldc(bool wide) 315 { 316 transition(vtos, vtos); 317 Label call_ldc, notFloat, notClass, notInt, Done; 318 319 if (wide) { 320 __ get_unsigned_2_byte_index_at_bcp(r1, 1); 321 } else { 322 __ load_unsigned_byte(r1, at_bcp(1)); 323 } 324 __ get_cpool_and_tags(r2, r0); 325 326 const int base_offset = ConstantPool::header_size() * wordSize; 327 const int tags_offset = Array<u1>::base_offset_in_bytes(); 328 329 // get type 330 __ add(r3, r1, tags_offset); 331 __ lea(r3, Address(r0, r3)); 332 __ ldarb(r3, r3); 333 334 // unresolved class - get the resolved class 335 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClass); 336 __ br(Assembler::EQ, call_ldc); 337 338 // unresolved class in error state - call into runtime to throw the error 339 // from the first resolution attempt 340 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClassInError); 341 __ br(Assembler::EQ, call_ldc); 342 343 // resolved class - need to call vm to get java mirror of the class 344 __ cmp(r3, (u1)JVM_CONSTANT_Class); 345 __ br(Assembler::NE, notClass); 346 347 __ bind(call_ldc); 348 __ mov(c_rarg1, wide); 349 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), c_rarg1); 350 __ push_ptr(r0); 351 __ verify_oop(r0); 352 __ b(Done); 353 354 __ bind(notClass); 355 __ cmp(r3, (u1)JVM_CONSTANT_Float); 356 __ br(Assembler::NE, notFloat); 357 // ftos 358 __ adds(r1, r2, r1, Assembler::LSL, 3); 359 __ ldrs(v0, Address(r1, base_offset)); 360 __ push_f(); 361 __ b(Done); 362 363 __ bind(notFloat); 364 365 __ cmp(r3, (u1)JVM_CONSTANT_Integer); 366 __ br(Assembler::NE, notInt); 367 368 // itos 369 __ adds(r1, r2, r1, Assembler::LSL, 3); 370 __ ldrw(r0, Address(r1, base_offset)); 371 __ push_i(r0); 372 __ b(Done); 373 374 __ bind(notInt); 375 condy_helper(Done); 376 377 __ bind(Done); 378 } 379 380 // Fast path for caching oop constants. 381 void TemplateTable::fast_aldc(bool wide) 382 { 383 transition(vtos, atos); 384 385 Register result = r0; 386 Register tmp = r1; 387 Register rarg = r2; 388 389 int index_size = wide ? sizeof(u2) : sizeof(u1); 390 391 Label resolved; 392 393 // We are resolved if the resolved reference cache entry contains a 394 // non-null object (String, MethodType, etc.) 395 assert_different_registers(result, tmp); 396 __ get_cache_index_at_bcp(tmp, 1, index_size); 397 __ load_resolved_reference_at_index(result, tmp); 398 __ cbnz(result, resolved); 399 400 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); 401 402 // first time invocation - must resolve first 403 __ mov(rarg, (int)bytecode()); 404 __ call_VM(result, entry, rarg); 405 406 __ bind(resolved); 407 408 { // Check for the null sentinel. 409 // If we just called the VM, it already did the mapping for us, 410 // but it's harmless to retry. 411 Label notNull; 412 413 // Stash null_sentinel address to get its value later 414 __ movptr(rarg, (uintptr_t)Universe::the_null_sentinel_addr()); 415 __ ldr(tmp, Address(rarg)); 416 __ cmpoop(result, tmp); 417 __ br(Assembler::NE, notNull); 418 __ mov(result, 0); // NULL object reference 419 __ bind(notNull); 420 } 421 422 if (VerifyOops) { 423 // Safe to call with 0 result 424 __ verify_oop(result); 425 } 426 } 427 428 void TemplateTable::ldc2_w() 429 { 430 transition(vtos, vtos); 431 Label notDouble, notLong, Done; 432 __ get_unsigned_2_byte_index_at_bcp(r0, 1); 433 434 __ get_cpool_and_tags(r1, r2); 435 const int base_offset = ConstantPool::header_size() * wordSize; 436 const int tags_offset = Array<u1>::base_offset_in_bytes(); 437 438 // get type 439 __ lea(r2, Address(r2, r0, Address::lsl(0))); 440 __ load_unsigned_byte(r2, Address(r2, tags_offset)); 441 __ cmpw(r2, (int)JVM_CONSTANT_Double); 442 __ br(Assembler::NE, notDouble); 443 444 // dtos 445 __ lea (r2, Address(r1, r0, Address::lsl(3))); 446 __ ldrd(v0, Address(r2, base_offset)); 447 __ push_d(); 448 __ b(Done); 449 450 __ bind(notDouble); 451 __ cmpw(r2, (int)JVM_CONSTANT_Long); 452 __ br(Assembler::NE, notLong); 453 454 // ltos 455 __ lea(r0, Address(r1, r0, Address::lsl(3))); 456 __ ldr(r0, Address(r0, base_offset)); 457 __ push_l(); 458 __ b(Done); 459 460 __ bind(notLong); 461 condy_helper(Done); 462 463 __ bind(Done); 464 } 465 466 void TemplateTable::condy_helper(Label& Done) 467 { 468 Register obj = r0; 469 Register rarg = r1; 470 Register flags = r2; 471 Register off = r3; 472 473 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); 474 475 __ mov(rarg, (int) bytecode()); 476 __ call_VM(obj, entry, rarg); 477 478 __ get_vm_result_2(flags, rthread); 479 480 // VMr = obj = base address to find primitive value to push 481 // VMr2 = flags = (tos, off) using format of CPCE::_flags 482 __ mov(off, flags); 483 __ andw(off, off, ConstantPoolCacheEntry::field_index_mask); 484 485 const Address field(obj, off); 486 487 // What sort of thing are we loading? 488 // x86 uses a shift and mask or wings it with a shift plus assert 489 // the mask is not needed. aarch64 just uses bitfield extract 490 __ ubfxw(flags, flags, ConstantPoolCacheEntry::tos_state_shift, 491 ConstantPoolCacheEntry::tos_state_bits); 492 493 switch (bytecode()) { 494 case Bytecodes::_ldc: 495 case Bytecodes::_ldc_w: 496 { 497 // tos in (itos, ftos, stos, btos, ctos, ztos) 498 Label notInt, notFloat, notShort, notByte, notChar, notBool; 499 __ cmpw(flags, itos); 500 __ br(Assembler::NE, notInt); 501 // itos 502 __ ldrw(r0, field); 503 __ push(itos); 504 __ b(Done); 505 506 __ bind(notInt); 507 __ cmpw(flags, ftos); 508 __ br(Assembler::NE, notFloat); 509 // ftos 510 __ load_float(field); 511 __ push(ftos); 512 __ b(Done); 513 514 __ bind(notFloat); 515 __ cmpw(flags, stos); 516 __ br(Assembler::NE, notShort); 517 // stos 518 __ load_signed_short(r0, field); 519 __ push(stos); 520 __ b(Done); 521 522 __ bind(notShort); 523 __ cmpw(flags, btos); 524 __ br(Assembler::NE, notByte); 525 // btos 526 __ load_signed_byte(r0, field); 527 __ push(btos); 528 __ b(Done); 529 530 __ bind(notByte); 531 __ cmpw(flags, ctos); 532 __ br(Assembler::NE, notChar); 533 // ctos 534 __ load_unsigned_short(r0, field); 535 __ push(ctos); 536 __ b(Done); 537 538 __ bind(notChar); 539 __ cmpw(flags, ztos); 540 __ br(Assembler::NE, notBool); 541 // ztos 542 __ load_signed_byte(r0, field); 543 __ push(ztos); 544 __ b(Done); 545 546 __ bind(notBool); 547 break; 548 } 549 550 case Bytecodes::_ldc2_w: 551 { 552 Label notLong, notDouble; 553 __ cmpw(flags, ltos); 554 __ br(Assembler::NE, notLong); 555 // ltos 556 __ ldr(r0, field); 557 __ push(ltos); 558 __ b(Done); 559 560 __ bind(notLong); 561 __ cmpw(flags, dtos); 562 __ br(Assembler::NE, notDouble); 563 // dtos 564 __ load_double(field); 565 __ push(dtos); 566 __ b(Done); 567 568 __ bind(notDouble); 569 break; 570 } 571 572 default: 573 ShouldNotReachHere(); 574 } 575 576 __ stop("bad ldc/condy"); 577 } 578 579 void TemplateTable::locals_index(Register reg, int offset) 580 { 581 __ ldrb(reg, at_bcp(offset)); 582 __ neg(reg, reg); 583 } 584 585 void TemplateTable::iload() { 586 iload_internal(); 587 } 588 589 void TemplateTable::nofast_iload() { 590 iload_internal(may_not_rewrite); 591 } 592 593 void TemplateTable::iload_internal(RewriteControl rc) { 594 transition(vtos, itos); 595 if (RewriteFrequentPairs && rc == may_rewrite) { 596 Label rewrite, done; 597 Register bc = r4; 598 599 // get next bytecode 600 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_iload))); 601 602 // if _iload, wait to rewrite to iload2. We only want to rewrite the 603 // last two iloads in a pair. Comparing against fast_iload means that 604 // the next bytecode is neither an iload or a caload, and therefore 605 // an iload pair. 606 __ cmpw(r1, Bytecodes::_iload); 607 __ br(Assembler::EQ, done); 608 609 // if _fast_iload rewrite to _fast_iload2 610 __ cmpw(r1, Bytecodes::_fast_iload); 611 __ movw(bc, Bytecodes::_fast_iload2); 612 __ br(Assembler::EQ, rewrite); 613 614 // if _caload rewrite to _fast_icaload 615 __ cmpw(r1, Bytecodes::_caload); 616 __ movw(bc, Bytecodes::_fast_icaload); 617 __ br(Assembler::EQ, rewrite); 618 619 // else rewrite to _fast_iload 620 __ movw(bc, Bytecodes::_fast_iload); 621 622 // rewrite 623 // bc: new bytecode 624 __ bind(rewrite); 625 patch_bytecode(Bytecodes::_iload, bc, r1, false); 626 __ bind(done); 627 628 } 629 630 // do iload, get the local value into tos 631 locals_index(r1); 632 __ ldr(r0, iaddress(r1)); 633 634 } 635 636 void TemplateTable::fast_iload2() 637 { 638 transition(vtos, itos); 639 locals_index(r1); 640 __ ldr(r0, iaddress(r1)); 641 __ push(itos); 642 locals_index(r1, 3); 643 __ ldr(r0, iaddress(r1)); 644 } 645 646 void TemplateTable::fast_iload() 647 { 648 transition(vtos, itos); 649 locals_index(r1); 650 __ ldr(r0, iaddress(r1)); 651 } 652 653 void TemplateTable::lload() 654 { 655 transition(vtos, ltos); 656 __ ldrb(r1, at_bcp(1)); 657 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord); 658 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1))); 659 } 660 661 void TemplateTable::fload() 662 { 663 transition(vtos, ftos); 664 locals_index(r1); 665 // n.b. we use ldrd here because this is a 64 bit slot 666 // this is comparable to the iload case 667 __ ldrd(v0, faddress(r1)); 668 } 669 670 void TemplateTable::dload() 671 { 672 transition(vtos, dtos); 673 __ ldrb(r1, at_bcp(1)); 674 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord); 675 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1))); 676 } 677 678 void TemplateTable::aload() 679 { 680 transition(vtos, atos); 681 locals_index(r1); 682 __ ldr(r0, iaddress(r1)); 683 } 684 685 void TemplateTable::locals_index_wide(Register reg) { 686 __ ldrh(reg, at_bcp(2)); 687 __ rev16w(reg, reg); 688 __ neg(reg, reg); 689 } 690 691 void TemplateTable::wide_iload() { 692 transition(vtos, itos); 693 locals_index_wide(r1); 694 __ ldr(r0, iaddress(r1)); 695 } 696 697 void TemplateTable::wide_lload() 698 { 699 transition(vtos, ltos); 700 __ ldrh(r1, at_bcp(2)); 701 __ rev16w(r1, r1); 702 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord); 703 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1))); 704 } 705 706 void TemplateTable::wide_fload() 707 { 708 transition(vtos, ftos); 709 locals_index_wide(r1); 710 // n.b. we use ldrd here because this is a 64 bit slot 711 // this is comparable to the iload case 712 __ ldrd(v0, faddress(r1)); 713 } 714 715 void TemplateTable::wide_dload() 716 { 717 transition(vtos, dtos); 718 __ ldrh(r1, at_bcp(2)); 719 __ rev16w(r1, r1); 720 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord); 721 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1))); 722 } 723 724 void TemplateTable::wide_aload() 725 { 726 transition(vtos, atos); 727 locals_index_wide(r1); 728 __ ldr(r0, aaddress(r1)); 729 } 730 731 void TemplateTable::index_check(Register array, Register index) 732 { 733 // destroys r1, rscratch1 734 // check array 735 __ null_check(array, arrayOopDesc::length_offset_in_bytes()); 736 // sign extend index for use by indexed load 737 // __ movl2ptr(index, index); 738 // check index 739 Register length = rscratch1; 740 __ ldrw(length, Address(array, arrayOopDesc::length_offset_in_bytes())); 741 __ cmpw(index, length); 742 if (index != r1) { 743 // ??? convention: move aberrant index into r1 for exception message 744 assert(r1 != array, "different registers"); 745 __ mov(r1, index); 746 } 747 Label ok; 748 __ br(Assembler::LO, ok); 749 // ??? convention: move array into r3 for exception message 750 __ mov(r3, array); 751 __ mov(rscratch1, Interpreter::_throw_ArrayIndexOutOfBoundsException_entry); 752 __ br(rscratch1); 753 __ bind(ok); 754 } 755 756 void TemplateTable::iaload() 757 { 758 transition(itos, itos); 759 __ mov(r1, r0); 760 __ pop_ptr(r0); 761 // r0: array 762 // r1: index 763 index_check(r0, r1); // leaves index in r1, kills rscratch1 764 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2); 765 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg); 766 } 767 768 void TemplateTable::laload() 769 { 770 transition(itos, ltos); 771 __ mov(r1, r0); 772 __ pop_ptr(r0); 773 // r0: array 774 // r1: index 775 index_check(r0, r1); // leaves index in r1, kills rscratch1 776 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3); 777 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg); 778 } 779 780 void TemplateTable::faload() 781 { 782 transition(itos, ftos); 783 __ mov(r1, r0); 784 __ pop_ptr(r0); 785 // r0: array 786 // r1: index 787 index_check(r0, r1); // leaves index in r1, kills rscratch1 788 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2); 789 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg); 790 } 791 792 void TemplateTable::daload() 793 { 794 transition(itos, dtos); 795 __ mov(r1, r0); 796 __ pop_ptr(r0); 797 // r0: array 798 // r1: index 799 index_check(r0, r1); // leaves index in r1, kills rscratch1 800 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3); 801 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg); 802 } 803 804 void TemplateTable::aaload() 805 { 806 transition(itos, atos); 807 __ mov(r1, r0); 808 __ pop_ptr(r0); 809 // r0: array 810 // r1: index 811 index_check(r0, r1); // leaves index in r1, kills rscratch1 812 if (EnableValhalla && ValueArrayFlatten) { 813 Label is_flat_array, done; 814 815 __ test_flat_array_oop(r0, r10 /*temp*/, is_flat_array); 816 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop); 817 do_oop_load(_masm, Address(r0, r1, Address::uxtw(LogBytesPerHeapOop)), r0, IS_ARRAY); 818 819 __ b(done); 820 __ bind(is_flat_array); 821 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load), r0, r1); 822 __ bind(done); 823 } else { 824 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop); 825 do_oop_load(_masm, Address(r0, r1, Address::uxtw(LogBytesPerHeapOop)), r0, IS_ARRAY); 826 } 827 } 828 829 void TemplateTable::baload() 830 { 831 transition(itos, itos); 832 __ mov(r1, r0); 833 __ pop_ptr(r0); 834 // r0: array 835 // r1: index 836 index_check(r0, r1); // leaves index in r1, kills rscratch1 837 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0); 838 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(0)), noreg, noreg); 839 } 840 841 void TemplateTable::caload() 842 { 843 transition(itos, itos); 844 __ mov(r1, r0); 845 __ pop_ptr(r0); 846 // r0: array 847 // r1: index 848 index_check(r0, r1); // leaves index in r1, kills rscratch1 849 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1); 850 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg); 851 } 852 853 // iload followed by caload frequent pair 854 void TemplateTable::fast_icaload() 855 { 856 transition(vtos, itos); 857 // load index out of locals 858 locals_index(r2); 859 __ ldr(r1, iaddress(r2)); 860 861 __ pop_ptr(r0); 862 863 // r0: array 864 // r1: index 865 index_check(r0, r1); // leaves index in r1, kills rscratch1 866 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1); 867 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg); 868 } 869 870 void TemplateTable::saload() 871 { 872 transition(itos, itos); 873 __ mov(r1, r0); 874 __ pop_ptr(r0); 875 // r0: array 876 // r1: index 877 index_check(r0, r1); // leaves index in r1, kills rscratch1 878 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_SHORT) >> 1); 879 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg); 880 } 881 882 void TemplateTable::iload(int n) 883 { 884 transition(vtos, itos); 885 __ ldr(r0, iaddress(n)); 886 } 887 888 void TemplateTable::lload(int n) 889 { 890 transition(vtos, ltos); 891 __ ldr(r0, laddress(n)); 892 } 893 894 void TemplateTable::fload(int n) 895 { 896 transition(vtos, ftos); 897 __ ldrs(v0, faddress(n)); 898 } 899 900 void TemplateTable::dload(int n) 901 { 902 transition(vtos, dtos); 903 __ ldrd(v0, daddress(n)); 904 } 905 906 void TemplateTable::aload(int n) 907 { 908 transition(vtos, atos); 909 __ ldr(r0, iaddress(n)); 910 } 911 912 void TemplateTable::aload_0() { 913 aload_0_internal(); 914 } 915 916 void TemplateTable::nofast_aload_0() { 917 aload_0_internal(may_not_rewrite); 918 } 919 920 void TemplateTable::aload_0_internal(RewriteControl rc) { 921 // According to bytecode histograms, the pairs: 922 // 923 // _aload_0, _fast_igetfield 924 // _aload_0, _fast_agetfield 925 // _aload_0, _fast_fgetfield 926 // 927 // occur frequently. If RewriteFrequentPairs is set, the (slow) 928 // _aload_0 bytecode checks if the next bytecode is either 929 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then 930 // rewrites the current bytecode into a pair bytecode; otherwise it 931 // rewrites the current bytecode into _fast_aload_0 that doesn't do 932 // the pair check anymore. 933 // 934 // Note: If the next bytecode is _getfield, the rewrite must be 935 // delayed, otherwise we may miss an opportunity for a pair. 936 // 937 // Also rewrite frequent pairs 938 // aload_0, aload_1 939 // aload_0, iload_1 940 // These bytecodes with a small amount of code are most profitable 941 // to rewrite 942 if (RewriteFrequentPairs && rc == may_rewrite) { 943 Label rewrite, done; 944 const Register bc = r4; 945 946 // get next bytecode 947 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0))); 948 949 // if _getfield then wait with rewrite 950 __ cmpw(r1, Bytecodes::Bytecodes::_getfield); 951 __ br(Assembler::EQ, done); 952 953 // if _igetfield then rewrite to _fast_iaccess_0 954 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 955 __ cmpw(r1, Bytecodes::_fast_igetfield); 956 __ movw(bc, Bytecodes::_fast_iaccess_0); 957 __ br(Assembler::EQ, rewrite); 958 959 // if _agetfield then rewrite to _fast_aaccess_0 960 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 961 __ cmpw(r1, Bytecodes::_fast_agetfield); 962 __ movw(bc, Bytecodes::_fast_aaccess_0); 963 __ br(Assembler::EQ, rewrite); 964 965 // if _fgetfield then rewrite to _fast_faccess_0 966 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); 967 __ cmpw(r1, Bytecodes::_fast_fgetfield); 968 __ movw(bc, Bytecodes::_fast_faccess_0); 969 __ br(Assembler::EQ, rewrite); 970 971 // else rewrite to _fast_aload0 972 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition"); 973 __ movw(bc, Bytecodes::Bytecodes::_fast_aload_0); 974 975 // rewrite 976 // bc: new bytecode 977 __ bind(rewrite); 978 patch_bytecode(Bytecodes::_aload_0, bc, r1, false); 979 980 __ bind(done); 981 } 982 983 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop). 984 aload(0); 985 } 986 987 void TemplateTable::istore() 988 { 989 transition(itos, vtos); 990 locals_index(r1); 991 // FIXME: We're being very pernickerty here storing a jint in a 992 // local with strw, which costs an extra instruction over what we'd 993 // be able to do with a simple str. We should just store the whole 994 // word. 995 __ lea(rscratch1, iaddress(r1)); 996 __ strw(r0, Address(rscratch1)); 997 } 998 999 void TemplateTable::lstore() 1000 { 1001 transition(ltos, vtos); 1002 locals_index(r1); 1003 __ str(r0, laddress(r1, rscratch1, _masm)); 1004 } 1005 1006 void TemplateTable::fstore() { 1007 transition(ftos, vtos); 1008 locals_index(r1); 1009 __ lea(rscratch1, iaddress(r1)); 1010 __ strs(v0, Address(rscratch1)); 1011 } 1012 1013 void TemplateTable::dstore() { 1014 transition(dtos, vtos); 1015 locals_index(r1); 1016 __ strd(v0, daddress(r1, rscratch1, _masm)); 1017 } 1018 1019 void TemplateTable::astore() 1020 { 1021 transition(vtos, vtos); 1022 __ pop_ptr(r0); 1023 locals_index(r1); 1024 __ str(r0, aaddress(r1)); 1025 } 1026 1027 void TemplateTable::wide_istore() { 1028 transition(vtos, vtos); 1029 __ pop_i(); 1030 locals_index_wide(r1); 1031 __ lea(rscratch1, iaddress(r1)); 1032 __ strw(r0, Address(rscratch1)); 1033 } 1034 1035 void TemplateTable::wide_lstore() { 1036 transition(vtos, vtos); 1037 __ pop_l(); 1038 locals_index_wide(r1); 1039 __ str(r0, laddress(r1, rscratch1, _masm)); 1040 } 1041 1042 void TemplateTable::wide_fstore() { 1043 transition(vtos, vtos); 1044 __ pop_f(); 1045 locals_index_wide(r1); 1046 __ lea(rscratch1, faddress(r1)); 1047 __ strs(v0, rscratch1); 1048 } 1049 1050 void TemplateTable::wide_dstore() { 1051 transition(vtos, vtos); 1052 __ pop_d(); 1053 locals_index_wide(r1); 1054 __ strd(v0, daddress(r1, rscratch1, _masm)); 1055 } 1056 1057 void TemplateTable::wide_astore() { 1058 transition(vtos, vtos); 1059 __ pop_ptr(r0); 1060 locals_index_wide(r1); 1061 __ str(r0, aaddress(r1)); 1062 } 1063 1064 void TemplateTable::iastore() { 1065 transition(itos, vtos); 1066 __ pop_i(r1); 1067 __ pop_ptr(r3); 1068 // r0: value 1069 // r1: index 1070 // r3: array 1071 index_check(r3, r1); // prefer index in r1 1072 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2); 1073 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), r0, noreg, noreg); 1074 } 1075 1076 void TemplateTable::lastore() { 1077 transition(ltos, vtos); 1078 __ pop_i(r1); 1079 __ pop_ptr(r3); 1080 // r0: value 1081 // r1: index 1082 // r3: array 1083 index_check(r3, r1); // prefer index in r1 1084 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3); 1085 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), r0, noreg, noreg); 1086 } 1087 1088 void TemplateTable::fastore() { 1089 transition(ftos, vtos); 1090 __ pop_i(r1); 1091 __ pop_ptr(r3); 1092 // v0: value 1093 // r1: index 1094 // r3: array 1095 index_check(r3, r1); // prefer index in r1 1096 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2); 1097 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), noreg /* ftos */, noreg, noreg); 1098 } 1099 1100 void TemplateTable::dastore() { 1101 transition(dtos, vtos); 1102 __ pop_i(r1); 1103 __ pop_ptr(r3); 1104 // v0: value 1105 // r1: index 1106 // r3: array 1107 index_check(r3, r1); // prefer index in r1 1108 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3); 1109 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), noreg /* dtos */, noreg, noreg); 1110 } 1111 1112 void TemplateTable::aastore() { 1113 Label is_null, ok_is_subtype, done; 1114 transition(vtos, vtos); 1115 // stack: ..., array, index, value 1116 __ ldr(r0, at_tos()); // value 1117 __ ldr(r2, at_tos_p1()); // index 1118 __ ldr(r3, at_tos_p2()); // array 1119 1120 Address element_address(r3, r4, Address::uxtw(LogBytesPerHeapOop)); 1121 1122 index_check(r3, r2); // kills r1 1123 1124 // DMS CHECK: what does line below do? 1125 __ add(r4, r2, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop); 1126 1127 // do array store check - check for NULL value first 1128 __ cbz(r0, is_null); 1129 1130 // Load array klass to r1, check if it is flat and bail out to ususal way 1131 Label is_flat_array; 1132 if (ValueArrayFlatten) { 1133 __ load_klass(r1, r3); 1134 __ test_flat_array_klass(r1, r10 /*temp*/, is_flat_array); 1135 } 1136 1137 // Move subklass into r1 1138 __ load_klass(r1, r0); 1139 // Move superklass into r0 1140 __ load_klass(r0, r3); 1141 __ ldr(r0, Address(r0, 1142 ObjArrayKlass::element_klass_offset())); 1143 // Compress array + index*oopSize + 12 into a single register. Frees r2. 1144 1145 // Generate subtype check. Blows r2, r5 1146 // Superklass in r0. Subklass in r1. 1147 __ gen_subtype_check(r1, ok_is_subtype); 1148 1149 // Come here on failure 1150 // object is at TOS 1151 __ b(Interpreter::_throw_ArrayStoreException_entry); 1152 1153 // Come here on success 1154 __ bind(ok_is_subtype); 1155 1156 // Get the value we will store 1157 __ ldr(r0, at_tos()); 1158 // Now store using the appropriate barrier 1159 do_oop_store(_masm, element_address, r0, IS_ARRAY); 1160 __ b(done); 1161 1162 // Have a NULL in r0, r3=array, r2=index. Store NULL at ary[idx] 1163 __ bind(is_null); 1164 __ profile_null_seen(r2); 1165 1166 if (EnableValhalla) { 1167 Label is_null_into_value_array_npe, store_null; 1168 1169 __ load_klass(r0, r3); 1170 // No way to store null in flat array 1171 __ test_flat_array_klass(r0, r1, is_null_into_value_array_npe); 1172 1173 // Use case for storing values in objArray where element_klass is specifically 1174 // a value type because they could not be flattened "for reasons", 1175 // these need to have the same semantics as flat arrays, i.e. NPE 1176 __ ldr(r0, Address(r0, ObjArrayKlass::element_klass_offset())); 1177 __ test_klass_is_value(r0, r1, is_null_into_value_array_npe); 1178 __ b(store_null); 1179 1180 __ bind(is_null_into_value_array_npe); 1181 __ b(ExternalAddress(Interpreter::_throw_NullPointerException_entry)); 1182 1183 __ bind(store_null); 1184 } 1185 1186 // Store a NULL 1187 do_oop_store(_masm, element_address, noreg, IS_ARRAY); 1188 __ b(done); 1189 1190 1191 if (EnableValhalla) { 1192 // r0 - value, r2 - index, r3 - array. r1 - loaded array klass 1193 // store non-null value 1194 __ bind(is_flat_array); 1195 1196 // Simplistic type check... 1197 Label is_type_ok; 1198 1199 // Profile the not-null value's klass. 1200 // Load value class 1201 __ load_klass(r10, r0); 1202 __ profile_typecheck(r2, r1, r0); // blows r2, and r0 1203 1204 // flat value array needs exact type match 1205 // is "r10 == r0" (value subclass == array element superclass) 1206 1207 // Move element klass into r0 1208 __ ldr(r0, Address(r1, ArrayKlass::element_klass_offset())); 1209 __ cmp(r0, r10); 1210 __ br(Assembler::EQ, is_type_ok); 1211 1212 __ profile_typecheck_failed(r2); 1213 __ b(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry)); 1214 __ bind(is_type_ok); 1215 1216 // DMS CHECK: Reload from TOS to be safe, 1217 // DMS CHECK: Because of profile_typecheck that blows r2 and r0. Should we really do it? 1218 __ ldr(r1, at_tos()); // value 1219 __ mov(r2, r3); // array 1220 __ ldr(r3, at_tos_p1()); // index 1221 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_store), r1, r2, r3); 1222 } 1223 1224 1225 // Pop stack arguments 1226 __ bind(done); 1227 __ add(esp, esp, 3 * Interpreter::stackElementSize); 1228 } 1229 1230 void TemplateTable::bastore() 1231 { 1232 transition(itos, vtos); 1233 __ pop_i(r1); 1234 __ pop_ptr(r3); 1235 // r0: value 1236 // r1: index 1237 // r3: array 1238 index_check(r3, r1); // prefer index in r1 1239 1240 // Need to check whether array is boolean or byte 1241 // since both types share the bastore bytecode. 1242 __ load_klass(r2, r3); 1243 __ ldrw(r2, Address(r2, Klass::layout_helper_offset())); 1244 int diffbit_index = exact_log2(Klass::layout_helper_boolean_diffbit()); 1245 Label L_skip; 1246 __ tbz(r2, diffbit_index, L_skip); 1247 __ andw(r0, r0, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1 1248 __ bind(L_skip); 1249 1250 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0); 1251 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(0)), r0, noreg, noreg); 1252 } 1253 1254 void TemplateTable::castore() 1255 { 1256 transition(itos, vtos); 1257 __ pop_i(r1); 1258 __ pop_ptr(r3); 1259 // r0: value 1260 // r1: index 1261 // r3: array 1262 index_check(r3, r1); // prefer index in r1 1263 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1); 1264 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(1)), r0, noreg, noreg); 1265 } 1266 1267 void TemplateTable::sastore() 1268 { 1269 castore(); 1270 } 1271 1272 void TemplateTable::istore(int n) 1273 { 1274 transition(itos, vtos); 1275 __ str(r0, iaddress(n)); 1276 } 1277 1278 void TemplateTable::lstore(int n) 1279 { 1280 transition(ltos, vtos); 1281 __ str(r0, laddress(n)); 1282 } 1283 1284 void TemplateTable::fstore(int n) 1285 { 1286 transition(ftos, vtos); 1287 __ strs(v0, faddress(n)); 1288 } 1289 1290 void TemplateTable::dstore(int n) 1291 { 1292 transition(dtos, vtos); 1293 __ strd(v0, daddress(n)); 1294 } 1295 1296 void TemplateTable::astore(int n) 1297 { 1298 transition(vtos, vtos); 1299 __ pop_ptr(r0); 1300 __ str(r0, iaddress(n)); 1301 } 1302 1303 void TemplateTable::pop() 1304 { 1305 transition(vtos, vtos); 1306 __ add(esp, esp, Interpreter::stackElementSize); 1307 } 1308 1309 void TemplateTable::pop2() 1310 { 1311 transition(vtos, vtos); 1312 __ add(esp, esp, 2 * Interpreter::stackElementSize); 1313 } 1314 1315 void TemplateTable::dup() 1316 { 1317 transition(vtos, vtos); 1318 __ ldr(r0, Address(esp, 0)); 1319 __ push(r0); 1320 // stack: ..., a, a 1321 } 1322 1323 void TemplateTable::dup_x1() 1324 { 1325 transition(vtos, vtos); 1326 // stack: ..., a, b 1327 __ ldr(r0, at_tos()); // load b 1328 __ ldr(r2, at_tos_p1()); // load a 1329 __ str(r0, at_tos_p1()); // store b 1330 __ str(r2, at_tos()); // store a 1331 __ push(r0); // push b 1332 // stack: ..., b, a, b 1333 } 1334 1335 void TemplateTable::dup_x2() 1336 { 1337 transition(vtos, vtos); 1338 // stack: ..., a, b, c 1339 __ ldr(r0, at_tos()); // load c 1340 __ ldr(r2, at_tos_p2()); // load a 1341 __ str(r0, at_tos_p2()); // store c in a 1342 __ push(r0); // push c 1343 // stack: ..., c, b, c, c 1344 __ ldr(r0, at_tos_p2()); // load b 1345 __ str(r2, at_tos_p2()); // store a in b 1346 // stack: ..., c, a, c, c 1347 __ str(r0, at_tos_p1()); // store b in c 1348 // stack: ..., c, a, b, c 1349 } 1350 1351 void TemplateTable::dup2() 1352 { 1353 transition(vtos, vtos); 1354 // stack: ..., a, b 1355 __ ldr(r0, at_tos_p1()); // load a 1356 __ push(r0); // push a 1357 __ ldr(r0, at_tos_p1()); // load b 1358 __ push(r0); // push b 1359 // stack: ..., a, b, a, b 1360 } 1361 1362 void TemplateTable::dup2_x1() 1363 { 1364 transition(vtos, vtos); 1365 // stack: ..., a, b, c 1366 __ ldr(r2, at_tos()); // load c 1367 __ ldr(r0, at_tos_p1()); // load b 1368 __ push(r0); // push b 1369 __ push(r2); // push c 1370 // stack: ..., a, b, c, b, c 1371 __ str(r2, at_tos_p3()); // store c in b 1372 // stack: ..., a, c, c, b, c 1373 __ ldr(r2, at_tos_p4()); // load a 1374 __ str(r2, at_tos_p2()); // store a in 2nd c 1375 // stack: ..., a, c, a, b, c 1376 __ str(r0, at_tos_p4()); // store b in a 1377 // stack: ..., b, c, a, b, c 1378 } 1379 1380 void TemplateTable::dup2_x2() 1381 { 1382 transition(vtos, vtos); 1383 // stack: ..., a, b, c, d 1384 __ ldr(r2, at_tos()); // load d 1385 __ ldr(r0, at_tos_p1()); // load c 1386 __ push(r0) ; // push c 1387 __ push(r2); // push d 1388 // stack: ..., a, b, c, d, c, d 1389 __ ldr(r0, at_tos_p4()); // load b 1390 __ str(r0, at_tos_p2()); // store b in d 1391 __ str(r2, at_tos_p4()); // store d in b 1392 // stack: ..., a, d, c, b, c, d 1393 __ ldr(r2, at_tos_p5()); // load a 1394 __ ldr(r0, at_tos_p3()); // load c 1395 __ str(r2, at_tos_p3()); // store a in c 1396 __ str(r0, at_tos_p5()); // store c in a 1397 // stack: ..., c, d, a, b, c, d 1398 } 1399 1400 void TemplateTable::swap() 1401 { 1402 transition(vtos, vtos); 1403 // stack: ..., a, b 1404 __ ldr(r2, at_tos_p1()); // load a 1405 __ ldr(r0, at_tos()); // load b 1406 __ str(r2, at_tos()); // store a in b 1407 __ str(r0, at_tos_p1()); // store b in a 1408 // stack: ..., b, a 1409 } 1410 1411 void TemplateTable::iop2(Operation op) 1412 { 1413 transition(itos, itos); 1414 // r0 <== r1 op r0 1415 __ pop_i(r1); 1416 switch (op) { 1417 case add : __ addw(r0, r1, r0); break; 1418 case sub : __ subw(r0, r1, r0); break; 1419 case mul : __ mulw(r0, r1, r0); break; 1420 case _and : __ andw(r0, r1, r0); break; 1421 case _or : __ orrw(r0, r1, r0); break; 1422 case _xor : __ eorw(r0, r1, r0); break; 1423 case shl : __ lslvw(r0, r1, r0); break; 1424 case shr : __ asrvw(r0, r1, r0); break; 1425 case ushr : __ lsrvw(r0, r1, r0);break; 1426 default : ShouldNotReachHere(); 1427 } 1428 } 1429 1430 void TemplateTable::lop2(Operation op) 1431 { 1432 transition(ltos, ltos); 1433 // r0 <== r1 op r0 1434 __ pop_l(r1); 1435 switch (op) { 1436 case add : __ add(r0, r1, r0); break; 1437 case sub : __ sub(r0, r1, r0); break; 1438 case mul : __ mul(r0, r1, r0); break; 1439 case _and : __ andr(r0, r1, r0); break; 1440 case _or : __ orr(r0, r1, r0); break; 1441 case _xor : __ eor(r0, r1, r0); break; 1442 default : ShouldNotReachHere(); 1443 } 1444 } 1445 1446 void TemplateTable::idiv() 1447 { 1448 transition(itos, itos); 1449 // explicitly check for div0 1450 Label no_div0; 1451 __ cbnzw(r0, no_div0); 1452 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry); 1453 __ br(rscratch1); 1454 __ bind(no_div0); 1455 __ pop_i(r1); 1456 // r0 <== r1 idiv r0 1457 __ corrected_idivl(r0, r1, r0, /* want_remainder */ false); 1458 } 1459 1460 void TemplateTable::irem() 1461 { 1462 transition(itos, itos); 1463 // explicitly check for div0 1464 Label no_div0; 1465 __ cbnzw(r0, no_div0); 1466 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry); 1467 __ br(rscratch1); 1468 __ bind(no_div0); 1469 __ pop_i(r1); 1470 // r0 <== r1 irem r0 1471 __ corrected_idivl(r0, r1, r0, /* want_remainder */ true); 1472 } 1473 1474 void TemplateTable::lmul() 1475 { 1476 transition(ltos, ltos); 1477 __ pop_l(r1); 1478 __ mul(r0, r0, r1); 1479 } 1480 1481 void TemplateTable::ldiv() 1482 { 1483 transition(ltos, ltos); 1484 // explicitly check for div0 1485 Label no_div0; 1486 __ cbnz(r0, no_div0); 1487 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry); 1488 __ br(rscratch1); 1489 __ bind(no_div0); 1490 __ pop_l(r1); 1491 // r0 <== r1 ldiv r0 1492 __ corrected_idivq(r0, r1, r0, /* want_remainder */ false); 1493 } 1494 1495 void TemplateTable::lrem() 1496 { 1497 transition(ltos, ltos); 1498 // explicitly check for div0 1499 Label no_div0; 1500 __ cbnz(r0, no_div0); 1501 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry); 1502 __ br(rscratch1); 1503 __ bind(no_div0); 1504 __ pop_l(r1); 1505 // r0 <== r1 lrem r0 1506 __ corrected_idivq(r0, r1, r0, /* want_remainder */ true); 1507 } 1508 1509 void TemplateTable::lshl() 1510 { 1511 transition(itos, ltos); 1512 // shift count is in r0 1513 __ pop_l(r1); 1514 __ lslv(r0, r1, r0); 1515 } 1516 1517 void TemplateTable::lshr() 1518 { 1519 transition(itos, ltos); 1520 // shift count is in r0 1521 __ pop_l(r1); 1522 __ asrv(r0, r1, r0); 1523 } 1524 1525 void TemplateTable::lushr() 1526 { 1527 transition(itos, ltos); 1528 // shift count is in r0 1529 __ pop_l(r1); 1530 __ lsrv(r0, r1, r0); 1531 } 1532 1533 void TemplateTable::fop2(Operation op) 1534 { 1535 transition(ftos, ftos); 1536 switch (op) { 1537 case add: 1538 // n.b. use ldrd because this is a 64 bit slot 1539 __ pop_f(v1); 1540 __ fadds(v0, v1, v0); 1541 break; 1542 case sub: 1543 __ pop_f(v1); 1544 __ fsubs(v0, v1, v0); 1545 break; 1546 case mul: 1547 __ pop_f(v1); 1548 __ fmuls(v0, v1, v0); 1549 break; 1550 case div: 1551 __ pop_f(v1); 1552 __ fdivs(v0, v1, v0); 1553 break; 1554 case rem: 1555 __ fmovs(v1, v0); 1556 __ pop_f(v0); 1557 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 1558 0, 2, MacroAssembler::ret_type_float); 1559 break; 1560 default: 1561 ShouldNotReachHere(); 1562 break; 1563 } 1564 } 1565 1566 void TemplateTable::dop2(Operation op) 1567 { 1568 transition(dtos, dtos); 1569 switch (op) { 1570 case add: 1571 // n.b. use ldrd because this is a 64 bit slot 1572 __ pop_d(v1); 1573 __ faddd(v0, v1, v0); 1574 break; 1575 case sub: 1576 __ pop_d(v1); 1577 __ fsubd(v0, v1, v0); 1578 break; 1579 case mul: 1580 __ pop_d(v1); 1581 __ fmuld(v0, v1, v0); 1582 break; 1583 case div: 1584 __ pop_d(v1); 1585 __ fdivd(v0, v1, v0); 1586 break; 1587 case rem: 1588 __ fmovd(v1, v0); 1589 __ pop_d(v0); 1590 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 1591 0, 2, MacroAssembler::ret_type_double); 1592 break; 1593 default: 1594 ShouldNotReachHere(); 1595 break; 1596 } 1597 } 1598 1599 void TemplateTable::ineg() 1600 { 1601 transition(itos, itos); 1602 __ negw(r0, r0); 1603 1604 } 1605 1606 void TemplateTable::lneg() 1607 { 1608 transition(ltos, ltos); 1609 __ neg(r0, r0); 1610 } 1611 1612 void TemplateTable::fneg() 1613 { 1614 transition(ftos, ftos); 1615 __ fnegs(v0, v0); 1616 } 1617 1618 void TemplateTable::dneg() 1619 { 1620 transition(dtos, dtos); 1621 __ fnegd(v0, v0); 1622 } 1623 1624 void TemplateTable::iinc() 1625 { 1626 transition(vtos, vtos); 1627 __ load_signed_byte(r1, at_bcp(2)); // get constant 1628 locals_index(r2); 1629 __ ldr(r0, iaddress(r2)); 1630 __ addw(r0, r0, r1); 1631 __ str(r0, iaddress(r2)); 1632 } 1633 1634 void TemplateTable::wide_iinc() 1635 { 1636 transition(vtos, vtos); 1637 // __ mov(r1, zr); 1638 __ ldrw(r1, at_bcp(2)); // get constant and index 1639 __ rev16(r1, r1); 1640 __ ubfx(r2, r1, 0, 16); 1641 __ neg(r2, r2); 1642 __ sbfx(r1, r1, 16, 16); 1643 __ ldr(r0, iaddress(r2)); 1644 __ addw(r0, r0, r1); 1645 __ str(r0, iaddress(r2)); 1646 } 1647 1648 void TemplateTable::convert() 1649 { 1650 // Checking 1651 #ifdef ASSERT 1652 { 1653 TosState tos_in = ilgl; 1654 TosState tos_out = ilgl; 1655 switch (bytecode()) { 1656 case Bytecodes::_i2l: // fall through 1657 case Bytecodes::_i2f: // fall through 1658 case Bytecodes::_i2d: // fall through 1659 case Bytecodes::_i2b: // fall through 1660 case Bytecodes::_i2c: // fall through 1661 case Bytecodes::_i2s: tos_in = itos; break; 1662 case Bytecodes::_l2i: // fall through 1663 case Bytecodes::_l2f: // fall through 1664 case Bytecodes::_l2d: tos_in = ltos; break; 1665 case Bytecodes::_f2i: // fall through 1666 case Bytecodes::_f2l: // fall through 1667 case Bytecodes::_f2d: tos_in = ftos; break; 1668 case Bytecodes::_d2i: // fall through 1669 case Bytecodes::_d2l: // fall through 1670 case Bytecodes::_d2f: tos_in = dtos; break; 1671 default : ShouldNotReachHere(); 1672 } 1673 switch (bytecode()) { 1674 case Bytecodes::_l2i: // fall through 1675 case Bytecodes::_f2i: // fall through 1676 case Bytecodes::_d2i: // fall through 1677 case Bytecodes::_i2b: // fall through 1678 case Bytecodes::_i2c: // fall through 1679 case Bytecodes::_i2s: tos_out = itos; break; 1680 case Bytecodes::_i2l: // fall through 1681 case Bytecodes::_f2l: // fall through 1682 case Bytecodes::_d2l: tos_out = ltos; break; 1683 case Bytecodes::_i2f: // fall through 1684 case Bytecodes::_l2f: // fall through 1685 case Bytecodes::_d2f: tos_out = ftos; break; 1686 case Bytecodes::_i2d: // fall through 1687 case Bytecodes::_l2d: // fall through 1688 case Bytecodes::_f2d: tos_out = dtos; break; 1689 default : ShouldNotReachHere(); 1690 } 1691 transition(tos_in, tos_out); 1692 } 1693 #endif // ASSERT 1694 // static const int64_t is_nan = 0x8000000000000000L; 1695 1696 // Conversion 1697 switch (bytecode()) { 1698 case Bytecodes::_i2l: 1699 __ sxtw(r0, r0); 1700 break; 1701 case Bytecodes::_i2f: 1702 __ scvtfws(v0, r0); 1703 break; 1704 case Bytecodes::_i2d: 1705 __ scvtfwd(v0, r0); 1706 break; 1707 case Bytecodes::_i2b: 1708 __ sxtbw(r0, r0); 1709 break; 1710 case Bytecodes::_i2c: 1711 __ uxthw(r0, r0); 1712 break; 1713 case Bytecodes::_i2s: 1714 __ sxthw(r0, r0); 1715 break; 1716 case Bytecodes::_l2i: 1717 __ uxtw(r0, r0); 1718 break; 1719 case Bytecodes::_l2f: 1720 __ scvtfs(v0, r0); 1721 break; 1722 case Bytecodes::_l2d: 1723 __ scvtfd(v0, r0); 1724 break; 1725 case Bytecodes::_f2i: 1726 { 1727 Label L_Okay; 1728 __ clear_fpsr(); 1729 __ fcvtzsw(r0, v0); 1730 __ get_fpsr(r1); 1731 __ cbzw(r1, L_Okay); 1732 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1733 0, 1, MacroAssembler::ret_type_integral); 1734 __ bind(L_Okay); 1735 } 1736 break; 1737 case Bytecodes::_f2l: 1738 { 1739 Label L_Okay; 1740 __ clear_fpsr(); 1741 __ fcvtzs(r0, v0); 1742 __ get_fpsr(r1); 1743 __ cbzw(r1, L_Okay); 1744 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1745 0, 1, MacroAssembler::ret_type_integral); 1746 __ bind(L_Okay); 1747 } 1748 break; 1749 case Bytecodes::_f2d: 1750 __ fcvts(v0, v0); 1751 break; 1752 case Bytecodes::_d2i: 1753 { 1754 Label L_Okay; 1755 __ clear_fpsr(); 1756 __ fcvtzdw(r0, v0); 1757 __ get_fpsr(r1); 1758 __ cbzw(r1, L_Okay); 1759 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1760 0, 1, MacroAssembler::ret_type_integral); 1761 __ bind(L_Okay); 1762 } 1763 break; 1764 case Bytecodes::_d2l: 1765 { 1766 Label L_Okay; 1767 __ clear_fpsr(); 1768 __ fcvtzd(r0, v0); 1769 __ get_fpsr(r1); 1770 __ cbzw(r1, L_Okay); 1771 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1772 0, 1, MacroAssembler::ret_type_integral); 1773 __ bind(L_Okay); 1774 } 1775 break; 1776 case Bytecodes::_d2f: 1777 __ fcvtd(v0, v0); 1778 break; 1779 default: 1780 ShouldNotReachHere(); 1781 } 1782 } 1783 1784 void TemplateTable::lcmp() 1785 { 1786 transition(ltos, itos); 1787 Label done; 1788 __ pop_l(r1); 1789 __ cmp(r1, r0); 1790 __ mov(r0, (u_int64_t)-1L); 1791 __ br(Assembler::LT, done); 1792 // __ mov(r0, 1UL); 1793 // __ csel(r0, r0, zr, Assembler::NE); 1794 // and here is a faster way 1795 __ csinc(r0, zr, zr, Assembler::EQ); 1796 __ bind(done); 1797 } 1798 1799 void TemplateTable::float_cmp(bool is_float, int unordered_result) 1800 { 1801 Label done; 1802 if (is_float) { 1803 // XXX get rid of pop here, use ... reg, mem32 1804 __ pop_f(v1); 1805 __ fcmps(v1, v0); 1806 } else { 1807 // XXX get rid of pop here, use ... reg, mem64 1808 __ pop_d(v1); 1809 __ fcmpd(v1, v0); 1810 } 1811 if (unordered_result < 0) { 1812 // we want -1 for unordered or less than, 0 for equal and 1 for 1813 // greater than. 1814 __ mov(r0, (u_int64_t)-1L); 1815 // for FP LT tests less than or unordered 1816 __ br(Assembler::LT, done); 1817 // install 0 for EQ otherwise 1 1818 __ csinc(r0, zr, zr, Assembler::EQ); 1819 } else { 1820 // we want -1 for less than, 0 for equal and 1 for unordered or 1821 // greater than. 1822 __ mov(r0, 1L); 1823 // for FP HI tests greater than or unordered 1824 __ br(Assembler::HI, done); 1825 // install 0 for EQ otherwise ~0 1826 __ csinv(r0, zr, zr, Assembler::EQ); 1827 1828 } 1829 __ bind(done); 1830 } 1831 1832 void TemplateTable::branch(bool is_jsr, bool is_wide) 1833 { 1834 // We might be moving to a safepoint. The thread which calls 1835 // Interpreter::notice_safepoints() will effectively flush its cache 1836 // when it makes a system call, but we need to do something to 1837 // ensure that we see the changed dispatch table. 1838 __ membar(MacroAssembler::LoadLoad); 1839 1840 __ profile_taken_branch(r0, r1); 1841 const ByteSize be_offset = MethodCounters::backedge_counter_offset() + 1842 InvocationCounter::counter_offset(); 1843 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() + 1844 InvocationCounter::counter_offset(); 1845 1846 // load branch displacement 1847 if (!is_wide) { 1848 __ ldrh(r2, at_bcp(1)); 1849 __ rev16(r2, r2); 1850 // sign extend the 16 bit value in r2 1851 __ sbfm(r2, r2, 0, 15); 1852 } else { 1853 __ ldrw(r2, at_bcp(1)); 1854 __ revw(r2, r2); 1855 // sign extend the 32 bit value in r2 1856 __ sbfm(r2, r2, 0, 31); 1857 } 1858 1859 // Handle all the JSR stuff here, then exit. 1860 // It's much shorter and cleaner than intermingling with the non-JSR 1861 // normal-branch stuff occurring below. 1862 1863 if (is_jsr) { 1864 // Pre-load the next target bytecode into rscratch1 1865 __ load_unsigned_byte(rscratch1, Address(rbcp, r2)); 1866 // compute return address as bci 1867 __ ldr(rscratch2, Address(rmethod, Method::const_offset())); 1868 __ add(rscratch2, rscratch2, 1869 in_bytes(ConstMethod::codes_offset()) - (is_wide ? 5 : 3)); 1870 __ sub(r1, rbcp, rscratch2); 1871 __ push_i(r1); 1872 // Adjust the bcp by the 16-bit displacement in r2 1873 __ add(rbcp, rbcp, r2); 1874 __ dispatch_only(vtos, /*generate_poll*/true); 1875 return; 1876 } 1877 1878 // Normal (non-jsr) branch handling 1879 1880 // Adjust the bcp by the displacement in r2 1881 __ add(rbcp, rbcp, r2); 1882 1883 assert(UseLoopCounter || !UseOnStackReplacement, 1884 "on-stack-replacement requires loop counters"); 1885 Label backedge_counter_overflow; 1886 Label profile_method; 1887 Label dispatch; 1888 if (UseLoopCounter) { 1889 // increment backedge counter for backward branches 1890 // r0: MDO 1891 // w1: MDO bumped taken-count 1892 // r2: target offset 1893 __ cmp(r2, zr); 1894 __ br(Assembler::GT, dispatch); // count only if backward branch 1895 1896 // ECN: FIXME: This code smells 1897 // check if MethodCounters exists 1898 Label has_counters; 1899 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset())); 1900 __ cbnz(rscratch1, has_counters); 1901 __ push(r0); 1902 __ push(r1); 1903 __ push(r2); 1904 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 1905 InterpreterRuntime::build_method_counters), rmethod); 1906 __ pop(r2); 1907 __ pop(r1); 1908 __ pop(r0); 1909 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset())); 1910 __ cbz(rscratch1, dispatch); // No MethodCounters allocated, OutOfMemory 1911 __ bind(has_counters); 1912 1913 if (TieredCompilation) { 1914 Label no_mdo; 1915 int increment = InvocationCounter::count_increment; 1916 if (ProfileInterpreter) { 1917 // Are we profiling? 1918 __ ldr(r1, Address(rmethod, in_bytes(Method::method_data_offset()))); 1919 __ cbz(r1, no_mdo); 1920 // Increment the MDO backedge counter 1921 const Address mdo_backedge_counter(r1, in_bytes(MethodData::backedge_counter_offset()) + 1922 in_bytes(InvocationCounter::counter_offset())); 1923 const Address mask(r1, in_bytes(MethodData::backedge_mask_offset())); 1924 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, 1925 r0, rscratch1, false, Assembler::EQ, 1926 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch); 1927 __ b(dispatch); 1928 } 1929 __ bind(no_mdo); 1930 // Increment backedge counter in MethodCounters* 1931 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset())); 1932 const Address mask(rscratch1, in_bytes(MethodCounters::backedge_mask_offset())); 1933 __ increment_mask_and_jump(Address(rscratch1, be_offset), increment, mask, 1934 r0, rscratch2, false, Assembler::EQ, 1935 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch); 1936 } else { // not TieredCompilation 1937 // increment counter 1938 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset())); 1939 __ ldrw(r0, Address(rscratch2, be_offset)); // load backedge counter 1940 __ addw(rscratch1, r0, InvocationCounter::count_increment); // increment counter 1941 __ strw(rscratch1, Address(rscratch2, be_offset)); // store counter 1942 1943 __ ldrw(r0, Address(rscratch2, inv_offset)); // load invocation counter 1944 __ andw(r0, r0, (unsigned)InvocationCounter::count_mask_value); // and the status bits 1945 __ addw(r0, r0, rscratch1); // add both counters 1946 1947 if (ProfileInterpreter) { 1948 // Test to see if we should create a method data oop 1949 __ ldrw(rscratch1, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 1950 __ cmpw(r0, rscratch1); 1951 __ br(Assembler::LT, dispatch); 1952 1953 // if no method data exists, go to profile method 1954 __ test_method_data_pointer(r0, profile_method); 1955 1956 if (UseOnStackReplacement) { 1957 // check for overflow against w1 which is the MDO taken count 1958 __ ldrw(rscratch1, Address(rscratch2, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()))); 1959 __ cmpw(r1, rscratch1); 1960 __ br(Assembler::LO, dispatch); // Intel == Assembler::below 1961 1962 // When ProfileInterpreter is on, the backedge_count comes 1963 // from the MethodData*, which value does not get reset on 1964 // the call to frequency_counter_overflow(). To avoid 1965 // excessive calls to the overflow routine while the method is 1966 // being compiled, add a second test to make sure the overflow 1967 // function is called only once every overflow_frequency. 1968 const int overflow_frequency = 1024; 1969 __ andsw(r1, r1, overflow_frequency - 1); 1970 __ br(Assembler::EQ, backedge_counter_overflow); 1971 1972 } 1973 } else { 1974 if (UseOnStackReplacement) { 1975 // check for overflow against w0, which is the sum of the 1976 // counters 1977 __ ldrw(rscratch1, Address(rscratch2, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()))); 1978 __ cmpw(r0, rscratch1); 1979 __ br(Assembler::HS, backedge_counter_overflow); // Intel == Assembler::aboveEqual 1980 } 1981 } 1982 } 1983 __ bind(dispatch); 1984 } 1985 1986 // Pre-load the next target bytecode into rscratch1 1987 __ load_unsigned_byte(rscratch1, Address(rbcp, 0)); 1988 1989 // continue with the bytecode @ target 1990 // rscratch1: target bytecode 1991 // rbcp: target bcp 1992 __ dispatch_only(vtos, /*generate_poll*/true); 1993 1994 if (UseLoopCounter) { 1995 if (ProfileInterpreter) { 1996 // Out-of-line code to allocate method data oop. 1997 __ bind(profile_method); 1998 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1999 __ load_unsigned_byte(r1, Address(rbcp, 0)); // restore target bytecode 2000 __ set_method_data_pointer_for_bcp(); 2001 __ b(dispatch); 2002 } 2003 2004 if (UseOnStackReplacement) { 2005 // invocation counter overflow 2006 __ bind(backedge_counter_overflow); 2007 __ neg(r2, r2); 2008 __ add(r2, r2, rbcp); // branch bcp 2009 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp) 2010 __ call_VM(noreg, 2011 CAST_FROM_FN_PTR(address, 2012 InterpreterRuntime::frequency_counter_overflow), 2013 r2); 2014 __ load_unsigned_byte(r1, Address(rbcp, 0)); // restore target bytecode 2015 2016 // r0: osr nmethod (osr ok) or NULL (osr not possible) 2017 // w1: target bytecode 2018 // r2: scratch 2019 __ cbz(r0, dispatch); // test result -- no osr if null 2020 // nmethod may have been invalidated (VM may block upon call_VM return) 2021 __ ldrb(r2, Address(r0, nmethod::state_offset())); 2022 if (nmethod::in_use != 0) 2023 __ sub(r2, r2, nmethod::in_use); 2024 __ cbnz(r2, dispatch); 2025 2026 // We have the address of an on stack replacement routine in r0 2027 // We need to prepare to execute the OSR method. First we must 2028 // migrate the locals and monitors off of the stack. 2029 2030 __ mov(r19, r0); // save the nmethod 2031 2032 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin)); 2033 2034 // r0 is OSR buffer, move it to expected parameter location 2035 __ mov(j_rarg0, r0); 2036 2037 // remove activation 2038 // get sender esp 2039 __ ldr(esp, 2040 Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize)); 2041 // remove frame anchor 2042 __ leave(); 2043 // Ensure compiled code always sees stack at proper alignment 2044 __ andr(sp, esp, -16); 2045 2046 // and begin the OSR nmethod 2047 __ ldr(rscratch1, Address(r19, nmethod::osr_entry_point_offset())); 2048 __ br(rscratch1); 2049 } 2050 } 2051 } 2052 2053 2054 void TemplateTable::if_0cmp(Condition cc) 2055 { 2056 transition(itos, vtos); 2057 // assume branch is more often taken than not (loops use backward branches) 2058 Label not_taken; 2059 if (cc == equal) 2060 __ cbnzw(r0, not_taken); 2061 else if (cc == not_equal) 2062 __ cbzw(r0, not_taken); 2063 else { 2064 __ andsw(zr, r0, r0); 2065 __ br(j_not(cc), not_taken); 2066 } 2067 2068 branch(false, false); 2069 __ bind(not_taken); 2070 __ profile_not_taken_branch(r0); 2071 } 2072 2073 void TemplateTable::if_icmp(Condition cc) 2074 { 2075 transition(itos, vtos); 2076 // assume branch is more often taken than not (loops use backward branches) 2077 Label not_taken; 2078 __ pop_i(r1); 2079 __ cmpw(r1, r0, Assembler::LSL); 2080 __ br(j_not(cc), not_taken); 2081 branch(false, false); 2082 __ bind(not_taken); 2083 __ profile_not_taken_branch(r0); 2084 } 2085 2086 void TemplateTable::if_nullcmp(Condition cc) 2087 { 2088 transition(atos, vtos); 2089 // assume branch is more often taken than not (loops use backward branches) 2090 Label not_taken; 2091 if (cc == equal) 2092 __ cbnz(r0, not_taken); 2093 else 2094 __ cbz(r0, not_taken); 2095 branch(false, false); 2096 __ bind(not_taken); 2097 __ profile_not_taken_branch(r0); 2098 } 2099 2100 void TemplateTable::if_acmp(Condition cc) 2101 { 2102 transition(atos, vtos); 2103 // assume branch is more often taken than not (loops use backward branches) 2104 Label taken, not_taken; 2105 __ pop_ptr(r1); 2106 __ cmpoop(r1, r0); 2107 2108 if (EnableValhalla) { 2109 __ br(Assembler::NE, (cc == not_equal) ? taken : not_taken); 2110 __ cbz(r1, (cc == equal) ? taken : not_taken); 2111 __ ldr(r2, Address(r1, oopDesc::mark_offset_in_bytes())); 2112 // DMS CHECK: Is code below correct or we should use tbz? 2113 __ andr(r2, r2, markOopDesc::always_locked_pattern && 0xF); 2114 __ cmp(r2, (u1) markOopDesc::always_locked_pattern); 2115 cc = (cc == equal) ? not_equal : equal; 2116 } 2117 2118 2119 __ br(j_not(cc), not_taken); 2120 __ bind(taken); 2121 branch(false, false); 2122 __ bind(not_taken); 2123 __ profile_not_taken_branch(r0); 2124 } 2125 2126 void TemplateTable::ret() { 2127 transition(vtos, vtos); 2128 // We might be moving to a safepoint. The thread which calls 2129 // Interpreter::notice_safepoints() will effectively flush its cache 2130 // when it makes a system call, but we need to do something to 2131 // ensure that we see the changed dispatch table. 2132 __ membar(MacroAssembler::LoadLoad); 2133 2134 locals_index(r1); 2135 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp 2136 __ profile_ret(r1, r2); 2137 __ ldr(rbcp, Address(rmethod, Method::const_offset())); 2138 __ lea(rbcp, Address(rbcp, r1)); 2139 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); 2140 __ dispatch_next(vtos, 0, /*generate_poll*/true); 2141 } 2142 2143 void TemplateTable::wide_ret() { 2144 transition(vtos, vtos); 2145 locals_index_wide(r1); 2146 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp 2147 __ profile_ret(r1, r2); 2148 __ ldr(rbcp, Address(rmethod, Method::const_offset())); 2149 __ lea(rbcp, Address(rbcp, r1)); 2150 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); 2151 __ dispatch_next(vtos, 0, /*generate_poll*/true); 2152 } 2153 2154 2155 void TemplateTable::tableswitch() { 2156 Label default_case, continue_execution; 2157 transition(itos, vtos); 2158 // align rbcp 2159 __ lea(r1, at_bcp(BytesPerInt)); 2160 __ andr(r1, r1, -BytesPerInt); 2161 // load lo & hi 2162 __ ldrw(r2, Address(r1, BytesPerInt)); 2163 __ ldrw(r3, Address(r1, 2 * BytesPerInt)); 2164 __ rev32(r2, r2); 2165 __ rev32(r3, r3); 2166 // check against lo & hi 2167 __ cmpw(r0, r2); 2168 __ br(Assembler::LT, default_case); 2169 __ cmpw(r0, r3); 2170 __ br(Assembler::GT, default_case); 2171 // lookup dispatch offset 2172 __ subw(r0, r0, r2); 2173 __ lea(r3, Address(r1, r0, Address::uxtw(2))); 2174 __ ldrw(r3, Address(r3, 3 * BytesPerInt)); 2175 __ profile_switch_case(r0, r1, r2); 2176 // continue execution 2177 __ bind(continue_execution); 2178 __ rev32(r3, r3); 2179 __ load_unsigned_byte(rscratch1, Address(rbcp, r3, Address::sxtw(0))); 2180 __ add(rbcp, rbcp, r3, ext::sxtw); 2181 __ dispatch_only(vtos, /*generate_poll*/true); 2182 // handle default 2183 __ bind(default_case); 2184 __ profile_switch_default(r0); 2185 __ ldrw(r3, Address(r1, 0)); 2186 __ b(continue_execution); 2187 } 2188 2189 void TemplateTable::lookupswitch() { 2190 transition(itos, itos); 2191 __ stop("lookupswitch bytecode should have been rewritten"); 2192 } 2193 2194 void TemplateTable::fast_linearswitch() { 2195 transition(itos, vtos); 2196 Label loop_entry, loop, found, continue_execution; 2197 // bswap r0 so we can avoid bswapping the table entries 2198 __ rev32(r0, r0); 2199 // align rbcp 2200 __ lea(r19, at_bcp(BytesPerInt)); // btw: should be able to get rid of 2201 // this instruction (change offsets 2202 // below) 2203 __ andr(r19, r19, -BytesPerInt); 2204 // set counter 2205 __ ldrw(r1, Address(r19, BytesPerInt)); 2206 __ rev32(r1, r1); 2207 __ b(loop_entry); 2208 // table search 2209 __ bind(loop); 2210 __ lea(rscratch1, Address(r19, r1, Address::lsl(3))); 2211 __ ldrw(rscratch1, Address(rscratch1, 2 * BytesPerInt)); 2212 __ cmpw(r0, rscratch1); 2213 __ br(Assembler::EQ, found); 2214 __ bind(loop_entry); 2215 __ subs(r1, r1, 1); 2216 __ br(Assembler::PL, loop); 2217 // default case 2218 __ profile_switch_default(r0); 2219 __ ldrw(r3, Address(r19, 0)); 2220 __ b(continue_execution); 2221 // entry found -> get offset 2222 __ bind(found); 2223 __ lea(rscratch1, Address(r19, r1, Address::lsl(3))); 2224 __ ldrw(r3, Address(rscratch1, 3 * BytesPerInt)); 2225 __ profile_switch_case(r1, r0, r19); 2226 // continue execution 2227 __ bind(continue_execution); 2228 __ rev32(r3, r3); 2229 __ add(rbcp, rbcp, r3, ext::sxtw); 2230 __ ldrb(rscratch1, Address(rbcp, 0)); 2231 __ dispatch_only(vtos, /*generate_poll*/true); 2232 } 2233 2234 void TemplateTable::fast_binaryswitch() { 2235 transition(itos, vtos); 2236 // Implementation using the following core algorithm: 2237 // 2238 // int binary_search(int key, LookupswitchPair* array, int n) { 2239 // // Binary search according to "Methodik des Programmierens" by 2240 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985. 2241 // int i = 0; 2242 // int j = n; 2243 // while (i+1 < j) { 2244 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q) 2245 // // with Q: for all i: 0 <= i < n: key < a[i] 2246 // // where a stands for the array and assuming that the (inexisting) 2247 // // element a[n] is infinitely big. 2248 // int h = (i + j) >> 1; 2249 // // i < h < j 2250 // if (key < array[h].fast_match()) { 2251 // j = h; 2252 // } else { 2253 // i = h; 2254 // } 2255 // } 2256 // // R: a[i] <= key < a[i+1] or Q 2257 // // (i.e., if key is within array, i is the correct index) 2258 // return i; 2259 // } 2260 2261 // Register allocation 2262 const Register key = r0; // already set (tosca) 2263 const Register array = r1; 2264 const Register i = r2; 2265 const Register j = r3; 2266 const Register h = rscratch1; 2267 const Register temp = rscratch2; 2268 2269 // Find array start 2270 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to 2271 // get rid of this 2272 // instruction (change 2273 // offsets below) 2274 __ andr(array, array, -BytesPerInt); 2275 2276 // Initialize i & j 2277 __ mov(i, 0); // i = 0; 2278 __ ldrw(j, Address(array, -BytesPerInt)); // j = length(array); 2279 2280 // Convert j into native byteordering 2281 __ rev32(j, j); 2282 2283 // And start 2284 Label entry; 2285 __ b(entry); 2286 2287 // binary search loop 2288 { 2289 Label loop; 2290 __ bind(loop); 2291 // int h = (i + j) >> 1; 2292 __ addw(h, i, j); // h = i + j; 2293 __ lsrw(h, h, 1); // h = (i + j) >> 1; 2294 // if (key < array[h].fast_match()) { 2295 // j = h; 2296 // } else { 2297 // i = h; 2298 // } 2299 // Convert array[h].match to native byte-ordering before compare 2300 __ ldr(temp, Address(array, h, Address::lsl(3))); 2301 __ rev32(temp, temp); 2302 __ cmpw(key, temp); 2303 // j = h if (key < array[h].fast_match()) 2304 __ csel(j, h, j, Assembler::LT); 2305 // i = h if (key >= array[h].fast_match()) 2306 __ csel(i, h, i, Assembler::GE); 2307 // while (i+1 < j) 2308 __ bind(entry); 2309 __ addw(h, i, 1); // i+1 2310 __ cmpw(h, j); // i+1 < j 2311 __ br(Assembler::LT, loop); 2312 } 2313 2314 // end of binary search, result index is i (must check again!) 2315 Label default_case; 2316 // Convert array[i].match to native byte-ordering before compare 2317 __ ldr(temp, Address(array, i, Address::lsl(3))); 2318 __ rev32(temp, temp); 2319 __ cmpw(key, temp); 2320 __ br(Assembler::NE, default_case); 2321 2322 // entry found -> j = offset 2323 __ add(j, array, i, ext::uxtx, 3); 2324 __ ldrw(j, Address(j, BytesPerInt)); 2325 __ profile_switch_case(i, key, array); 2326 __ rev32(j, j); 2327 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0))); 2328 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0))); 2329 __ dispatch_only(vtos, /*generate_poll*/true); 2330 2331 // default case -> j = default offset 2332 __ bind(default_case); 2333 __ profile_switch_default(i); 2334 __ ldrw(j, Address(array, -2 * BytesPerInt)); 2335 __ rev32(j, j); 2336 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0))); 2337 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0))); 2338 __ dispatch_only(vtos, /*generate_poll*/true); 2339 } 2340 2341 2342 void TemplateTable::_return(TosState state) 2343 { 2344 transition(state, state); 2345 assert(_desc->calls_vm(), 2346 "inconsistent calls_vm information"); // call in remove_activation 2347 2348 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) { 2349 assert(state == vtos, "only valid state"); 2350 2351 __ ldr(c_rarg1, aaddress(0)); 2352 __ load_klass(r3, c_rarg1); 2353 __ ldrw(r3, Address(r3, Klass::access_flags_offset())); 2354 Label skip_register_finalizer; 2355 __ tbz(r3, exact_log2(JVM_ACC_HAS_FINALIZER), skip_register_finalizer); 2356 2357 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), c_rarg1); 2358 2359 __ bind(skip_register_finalizer); 2360 } 2361 2362 // Issue a StoreStore barrier after all stores but before return 2363 // from any constructor for any class with a final field. We don't 2364 // know if this is a finalizer, so we always do so. 2365 if (_desc->bytecode() == Bytecodes::_return) 2366 __ membar(MacroAssembler::StoreStore); 2367 2368 // Narrow result if state is itos but result type is smaller. 2369 // Need to narrow in the return bytecode rather than in generate_return_entry 2370 // since compiled code callers expect the result to already be narrowed. 2371 if (state == itos) { 2372 __ narrow(r0); 2373 } 2374 2375 __ remove_activation(state); 2376 __ ret(lr); 2377 } 2378 2379 // ---------------------------------------------------------------------------- 2380 // Volatile variables demand their effects be made known to all CPU's 2381 // in order. Store buffers on most chips allow reads & writes to 2382 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode 2383 // without some kind of memory barrier (i.e., it's not sufficient that 2384 // the interpreter does not reorder volatile references, the hardware 2385 // also must not reorder them). 2386 // 2387 // According to the new Java Memory Model (JMM): 2388 // (1) All volatiles are serialized wrt to each other. ALSO reads & 2389 // writes act as aquire & release, so: 2390 // (2) A read cannot let unrelated NON-volatile memory refs that 2391 // happen after the read float up to before the read. It's OK for 2392 // non-volatile memory refs that happen before the volatile read to 2393 // float down below it. 2394 // (3) Similar a volatile write cannot let unrelated NON-volatile 2395 // memory refs that happen BEFORE the write float down to after the 2396 // write. It's OK for non-volatile memory refs that happen after the 2397 // volatile write to float up before it. 2398 // 2399 // We only put in barriers around volatile refs (they are expensive), 2400 // not _between_ memory refs (that would require us to track the 2401 // flavor of the previous memory refs). Requirements (2) and (3) 2402 // require some barriers before volatile stores and after volatile 2403 // loads. These nearly cover requirement (1) but miss the 2404 // volatile-store-volatile-load case. This final case is placed after 2405 // volatile-stores although it could just as well go before 2406 // volatile-loads. 2407 2408 void TemplateTable::resolve_cache_and_index(int byte_no, 2409 Register Rcache, 2410 Register index, 2411 size_t index_size) { 2412 const Register temp = r19; 2413 assert_different_registers(Rcache, index, temp); 2414 2415 Label resolved; 2416 2417 Bytecodes::Code code = bytecode(); 2418 switch (code) { 2419 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break; 2420 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break; 2421 default: break; 2422 } 2423 2424 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 2425 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size); 2426 __ subs(zr, temp, (int) code); // have we resolved this bytecode? 2427 __ br(Assembler::EQ, resolved); 2428 2429 // resolve first time through 2430 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache); 2431 __ mov(temp, (int) code); 2432 __ call_VM(noreg, entry, temp); 2433 2434 // Update registers with resolved info 2435 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); 2436 // n.b. unlike x86 Rcache is now rcpool plus the indexed offset 2437 // so all clients ofthis method must be modified accordingly 2438 __ bind(resolved); 2439 } 2440 2441 // The Rcache and index registers must be set before call 2442 // n.b unlike x86 cache already includes the index offset 2443 void TemplateTable::load_field_cp_cache_entry(Register obj, 2444 Register cache, 2445 Register index, 2446 Register off, 2447 Register flags, 2448 bool is_static = false) { 2449 assert_different_registers(cache, index, flags, off); 2450 2451 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2452 // Field offset 2453 __ ldr(off, Address(cache, in_bytes(cp_base_offset + 2454 ConstantPoolCacheEntry::f2_offset()))); 2455 // Flags 2456 __ ldrw(flags, Address(cache, in_bytes(cp_base_offset + 2457 ConstantPoolCacheEntry::flags_offset()))); 2458 2459 // klass overwrite register 2460 if (is_static) { 2461 __ ldr(obj, Address(cache, in_bytes(cp_base_offset + 2462 ConstantPoolCacheEntry::f1_offset()))); 2463 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 2464 __ ldr(obj, Address(obj, mirror_offset)); 2465 __ resolve_oop_handle(obj); 2466 } 2467 } 2468 2469 void TemplateTable::load_invoke_cp_cache_entry(int byte_no, 2470 Register method, 2471 Register itable_index, 2472 Register flags, 2473 bool is_invokevirtual, 2474 bool is_invokevfinal, /*unused*/ 2475 bool is_invokedynamic) { 2476 // setup registers 2477 const Register cache = rscratch2; 2478 const Register index = r4; 2479 assert_different_registers(method, flags); 2480 assert_different_registers(method, cache, index); 2481 assert_different_registers(itable_index, flags); 2482 assert_different_registers(itable_index, cache, index); 2483 // determine constant pool cache field offsets 2484 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant"); 2485 const int method_offset = in_bytes( 2486 ConstantPoolCache::base_offset() + 2487 (is_invokevirtual 2488 ? ConstantPoolCacheEntry::f2_offset() 2489 : ConstantPoolCacheEntry::f1_offset())); 2490 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + 2491 ConstantPoolCacheEntry::flags_offset()); 2492 // access constant pool cache fields 2493 const int index_offset = in_bytes(ConstantPoolCache::base_offset() + 2494 ConstantPoolCacheEntry::f2_offset()); 2495 2496 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2)); 2497 resolve_cache_and_index(byte_no, cache, index, index_size); 2498 __ ldr(method, Address(cache, method_offset)); 2499 2500 if (itable_index != noreg) { 2501 __ ldr(itable_index, Address(cache, index_offset)); 2502 } 2503 __ ldrw(flags, Address(cache, flags_offset)); 2504 } 2505 2506 2507 // The registers cache and index expected to be set before call. 2508 // Correct values of the cache and index registers are preserved. 2509 void TemplateTable::jvmti_post_field_access(Register cache, Register index, 2510 bool is_static, bool has_tos) { 2511 // do the JVMTI work here to avoid disturbing the register state below 2512 // We use c_rarg registers here because we want to use the register used in 2513 // the call to the VM 2514 if (JvmtiExport::can_post_field_access()) { 2515 // Check to see if a field access watch has been set before we 2516 // take the time to call into the VM. 2517 Label L1; 2518 assert_different_registers(cache, index, r0); 2519 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 2520 __ ldrw(r0, Address(rscratch1)); 2521 __ cbzw(r0, L1); 2522 2523 __ get_cache_and_index_at_bcp(c_rarg2, c_rarg3, 1); 2524 __ lea(c_rarg2, Address(c_rarg2, in_bytes(ConstantPoolCache::base_offset()))); 2525 2526 if (is_static) { 2527 __ mov(c_rarg1, zr); // NULL object reference 2528 } else { 2529 __ ldr(c_rarg1, at_tos()); // get object pointer without popping it 2530 __ verify_oop(c_rarg1); 2531 } 2532 // c_rarg1: object pointer or NULL 2533 // c_rarg2: cache entry pointer 2534 // c_rarg3: jvalue object on the stack 2535 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 2536 InterpreterRuntime::post_field_access), 2537 c_rarg1, c_rarg2, c_rarg3); 2538 __ get_cache_and_index_at_bcp(cache, index, 1); 2539 __ bind(L1); 2540 } 2541 } 2542 2543 void TemplateTable::pop_and_check_object(Register r) 2544 { 2545 __ pop_ptr(r); 2546 __ null_check(r); // for field access must check obj. 2547 __ verify_oop(r); 2548 } 2549 2550 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) 2551 { 2552 const Register cache = r2; 2553 const Register index = r3; 2554 const Register obj = r4; 2555 const Register off = r19; 2556 const Register flags = r0; 2557 const Register raw_flags = r6; 2558 const Register bc = r4; // uses same reg as obj, so don't mix them 2559 2560 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 2561 jvmti_post_field_access(cache, index, is_static, false); 2562 load_field_cp_cache_entry(obj, cache, index, off, raw_flags, is_static); 2563 2564 if (!is_static) { 2565 // obj is on the stack 2566 pop_and_check_object(obj); 2567 } 2568 2569 // 8179954: We need to make sure that the code generated for 2570 // volatile accesses forms a sequentially-consistent set of 2571 // operations when combined with STLR and LDAR. Without a leading 2572 // membar it's possible for a simple Dekker test to fail if loads 2573 // use LDR;DMB but stores use STLR. This can happen if C2 compiles 2574 // the stores in one method and we interpret the loads in another. 2575 if (! UseBarriersForVolatile) { 2576 Label notVolatile; 2577 __ tbz(raw_flags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 2578 __ membar(MacroAssembler::AnyAny); 2579 __ bind(notVolatile); 2580 } 2581 2582 const Address field(obj, off); 2583 2584 Label Done, notByte, notBool, notInt, notShort, notChar, 2585 notLong, notFloat, notObj, notDouble; 2586 2587 // x86 uses a shift and mask or wings it with a shift plus assert 2588 // the mask is not needed. aarch64 just uses bitfield extract 2589 __ ubfxw(flags, raw_flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits); 2590 2591 assert(btos == 0, "change code, btos != 0"); 2592 __ cbnz(flags, notByte); 2593 2594 // Don't rewrite getstatic, only getfield 2595 if (is_static) rc = may_not_rewrite; 2596 2597 // btos 2598 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg); 2599 __ push(btos); 2600 // Rewrite bytecode to be faster 2601 if (rc == may_rewrite) { 2602 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1); 2603 } 2604 __ b(Done); 2605 2606 __ bind(notByte); 2607 __ cmp(flags, (u1)ztos); 2608 __ br(Assembler::NE, notBool); 2609 2610 // ztos (same code as btos) 2611 __ access_load_at(T_BOOLEAN, IN_HEAP, r0, field, noreg, noreg); 2612 __ push(ztos); 2613 // Rewrite bytecode to be faster 2614 if (rc == may_rewrite) { 2615 // use btos rewriting, no truncating to t/f bit is needed for getfield. 2616 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1); 2617 } 2618 __ b(Done); 2619 2620 __ bind(notBool); 2621 __ cmp(flags, (u1)atos); 2622 __ br(Assembler::NE, notObj); 2623 // atos 2624 if (!EnableValhalla) { 2625 do_oop_load(_masm, field, r0, IN_HEAP); 2626 __ push(atos); 2627 if (rc == may_rewrite) { 2628 patch_bytecode(Bytecodes::_fast_agetfield, bc, r1); 2629 } 2630 __ b(Done); 2631 } else { // Valhalla 2632 2633 if (is_static) { 2634 __ load_heap_oop(r0, field); 2635 Label isFlattenable, isUninitialized; 2636 // Issue below if the static field has not been initialized yet 2637 __ test_field_is_flattenable(raw_flags, r10, isFlattenable); 2638 // Not flattenable case 2639 __ push(atos); 2640 __ b(Done); 2641 // Flattenable case, must not return null even if uninitialized 2642 __ bind(isFlattenable); 2643 __ cbz(r0, isUninitialized); 2644 __ push(atos); 2645 __ b(Done); 2646 __ bind(isUninitialized); 2647 __ andw(raw_flags, raw_flags, ConstantPoolCacheEntry::field_index_mask); 2648 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_static_value_field), obj, raw_flags); 2649 __ verify_oop(r0); 2650 __ push(atos); 2651 __ b(Done); 2652 } else { 2653 Label isFlattened, isInitialized, isFlattenable, rewriteFlattenable; 2654 __ test_field_is_flattenable(raw_flags, r10, isFlattenable); 2655 // Non-flattenable field case, also covers the object case 2656 __ load_heap_oop(r0, field); 2657 __ push(atos); 2658 if (rc == may_rewrite) { 2659 patch_bytecode(Bytecodes::_fast_agetfield, bc, r1); 2660 } 2661 __ b(Done); 2662 __ bind(isFlattenable); 2663 __ test_field_is_flattened(raw_flags, r10, isFlattened); 2664 // Non-flattened field case 2665 __ load_heap_oop(r0, field); 2666 __ cbnz(r0, isInitialized); 2667 __ andw(raw_flags, raw_flags, ConstantPoolCacheEntry::field_index_mask); 2668 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field), obj, raw_flags); 2669 __ bind(isInitialized); 2670 __ verify_oop(r0); 2671 __ push(atos); 2672 __ b(rewriteFlattenable); 2673 __ bind(isFlattened); 2674 __ ldr(r10, Address(cache, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f1_offset()))); 2675 __ andw(raw_flags, raw_flags, ConstantPoolCacheEntry::field_index_mask); 2676 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field), obj, raw_flags, r10); 2677 __ verify_oop(r0); 2678 __ push(atos); 2679 __ bind(rewriteFlattenable); 2680 if (rc == may_rewrite) { 2681 patch_bytecode(Bytecodes::_fast_qgetfield, bc, r1); 2682 } 2683 __ b(Done); 2684 } 2685 } 2686 2687 __ bind(notObj); 2688 __ cmp(flags, (u1)itos); 2689 __ br(Assembler::NE, notInt); 2690 // itos 2691 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg); 2692 __ push(itos); 2693 // Rewrite bytecode to be faster 2694 if (rc == may_rewrite) { 2695 patch_bytecode(Bytecodes::_fast_igetfield, bc, r1); 2696 } 2697 __ b(Done); 2698 2699 __ bind(notInt); 2700 __ cmp(flags, (u1)ctos); 2701 __ br(Assembler::NE, notChar); 2702 // ctos 2703 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg); 2704 __ push(ctos); 2705 // Rewrite bytecode to be faster 2706 if (rc == may_rewrite) { 2707 patch_bytecode(Bytecodes::_fast_cgetfield, bc, r1); 2708 } 2709 __ b(Done); 2710 2711 __ bind(notChar); 2712 __ cmp(flags, (u1)stos); 2713 __ br(Assembler::NE, notShort); 2714 // stos 2715 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg); 2716 __ push(stos); 2717 // Rewrite bytecode to be faster 2718 if (rc == may_rewrite) { 2719 patch_bytecode(Bytecodes::_fast_sgetfield, bc, r1); 2720 } 2721 __ b(Done); 2722 2723 __ bind(notShort); 2724 __ cmp(flags, (u1)ltos); 2725 __ br(Assembler::NE, notLong); 2726 // ltos 2727 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg); 2728 __ push(ltos); 2729 // Rewrite bytecode to be faster 2730 if (rc == may_rewrite) { 2731 patch_bytecode(Bytecodes::_fast_lgetfield, bc, r1); 2732 } 2733 __ b(Done); 2734 2735 __ bind(notLong); 2736 __ cmp(flags, (u1)ftos); 2737 __ br(Assembler::NE, notFloat); 2738 // ftos 2739 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg); 2740 __ push(ftos); 2741 // Rewrite bytecode to be faster 2742 if (rc == may_rewrite) { 2743 patch_bytecode(Bytecodes::_fast_fgetfield, bc, r1); 2744 } 2745 __ b(Done); 2746 2747 __ bind(notFloat); 2748 #ifdef ASSERT 2749 __ cmp(flags, (u1)dtos); 2750 __ br(Assembler::NE, notDouble); 2751 #endif 2752 // dtos 2753 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* ftos */, field, noreg, noreg); 2754 __ push(dtos); 2755 // Rewrite bytecode to be faster 2756 if (rc == may_rewrite) { 2757 patch_bytecode(Bytecodes::_fast_dgetfield, bc, r1); 2758 } 2759 #ifdef ASSERT 2760 __ b(Done); 2761 2762 __ bind(notDouble); 2763 __ stop("Bad state"); 2764 #endif 2765 2766 __ bind(Done); 2767 2768 Label notVolatile; 2769 __ tbz(raw_flags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 2770 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore); 2771 __ bind(notVolatile); 2772 } 2773 2774 2775 void TemplateTable::getfield(int byte_no) 2776 { 2777 getfield_or_static(byte_no, false); 2778 } 2779 2780 void TemplateTable::nofast_getfield(int byte_no) { 2781 getfield_or_static(byte_no, false, may_not_rewrite); 2782 } 2783 2784 void TemplateTable::getstatic(int byte_no) 2785 { 2786 getfield_or_static(byte_no, true); 2787 } 2788 2789 // The registers cache and index expected to be set before call. 2790 // The function may destroy various registers, just not the cache and index registers. 2791 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) { 2792 transition(vtos, vtos); 2793 2794 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); 2795 2796 if (JvmtiExport::can_post_field_modification()) { 2797 // Check to see if a field modification watch has been set before 2798 // we take the time to call into the VM. 2799 Label L1; 2800 assert_different_registers(cache, index, r0); 2801 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 2802 __ ldrw(r0, Address(rscratch1)); 2803 __ cbz(r0, L1); 2804 2805 __ get_cache_and_index_at_bcp(c_rarg2, rscratch1, 1); 2806 2807 if (is_static) { 2808 // Life is simple. Null out the object pointer. 2809 __ mov(c_rarg1, zr); 2810 } else { 2811 // Life is harder. The stack holds the value on top, followed by 2812 // the object. We don't know the size of the value, though; it 2813 // could be one or two words depending on its type. As a result, 2814 // we must find the type to determine where the object is. 2815 __ ldrw(c_rarg3, Address(c_rarg2, 2816 in_bytes(cp_base_offset + 2817 ConstantPoolCacheEntry::flags_offset()))); 2818 __ lsr(c_rarg3, c_rarg3, 2819 ConstantPoolCacheEntry::tos_state_shift); 2820 ConstantPoolCacheEntry::verify_tos_state_shift(); 2821 Label nope2, done, ok; 2822 __ ldr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue 2823 __ cmpw(c_rarg3, ltos); 2824 __ br(Assembler::EQ, ok); 2825 __ cmpw(c_rarg3, dtos); 2826 __ br(Assembler::NE, nope2); 2827 __ bind(ok); 2828 __ ldr(c_rarg1, at_tos_p2()); // ltos (two word jvalue) 2829 __ bind(nope2); 2830 } 2831 // cache entry pointer 2832 __ add(c_rarg2, c_rarg2, in_bytes(cp_base_offset)); 2833 // object (tos) 2834 __ mov(c_rarg3, esp); 2835 // c_rarg1: object pointer set up above (NULL if static) 2836 // c_rarg2: cache entry pointer 2837 // c_rarg3: jvalue object on the stack 2838 __ call_VM(noreg, 2839 CAST_FROM_FN_PTR(address, 2840 InterpreterRuntime::post_field_modification), 2841 c_rarg1, c_rarg2, c_rarg3); 2842 __ get_cache_and_index_at_bcp(cache, index, 1); 2843 __ bind(L1); 2844 } 2845 } 2846 2847 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) { 2848 transition(vtos, vtos); 2849 2850 const Register cache = r2; 2851 const Register index = r3; 2852 const Register obj = r2; 2853 const Register off = r19; 2854 const Register flags = r0; 2855 const Register flags2 = r6; 2856 const Register bc = r4; 2857 2858 resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); 2859 jvmti_post_field_mod(cache, index, is_static); 2860 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 2861 2862 Label Done; 2863 __ mov(r5, flags); 2864 2865 { 2866 Label notVolatile; 2867 __ tbz(r5, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 2868 __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore); 2869 __ bind(notVolatile); 2870 } 2871 2872 // field address 2873 const Address field(obj, off); 2874 2875 Label notByte, notBool, notInt, notShort, notChar, 2876 notLong, notFloat, notObj, notDouble; 2877 2878 __ mov(flags2, flags); 2879 2880 // x86 uses a shift and mask or wings it with a shift plus assert 2881 // the mask is not needed. aarch64 just uses bitfield extract 2882 __ ubfxw(flags, flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits); 2883 2884 assert(btos == 0, "change code, btos != 0"); 2885 __ cbnz(flags, notByte); 2886 2887 // Don't rewrite putstatic, only putfield 2888 if (is_static) rc = may_not_rewrite; 2889 2890 // btos 2891 { 2892 __ pop(btos); 2893 if (!is_static) pop_and_check_object(obj); 2894 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg); 2895 if (rc == may_rewrite) { 2896 patch_bytecode(Bytecodes::_fast_bputfield, bc, r1, true, byte_no); 2897 } 2898 __ b(Done); 2899 } 2900 2901 __ bind(notByte); 2902 __ cmp(flags, (u1)ztos); 2903 __ br(Assembler::NE, notBool); 2904 2905 // ztos 2906 { 2907 __ pop(ztos); 2908 if (!is_static) pop_and_check_object(obj); 2909 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg); 2910 if (rc == may_rewrite) { 2911 patch_bytecode(Bytecodes::_fast_zputfield, bc, r1, true, byte_no); 2912 } 2913 __ b(Done); 2914 } 2915 2916 __ bind(notBool); 2917 __ cmp(flags, (u1)atos); 2918 __ br(Assembler::NE, notObj); 2919 2920 // atos 2921 { 2922 if (!EnableValhalla) { 2923 __ pop(atos); 2924 if (!is_static) pop_and_check_object(obj); 2925 // Store into the field 2926 do_oop_store(_masm, field, r0, IN_HEAP); 2927 if (rc == may_rewrite) { 2928 patch_bytecode(Bytecodes::_fast_aputfield, bc, r1, true, byte_no); 2929 } 2930 __ b(Done); 2931 } else { // Valhalla 2932 2933 __ pop(atos); 2934 if (is_static) { 2935 Label notFlattenable; 2936 __ test_field_is_not_flattenable(flags2, r10, notFlattenable); 2937 __ null_check(r0); 2938 __ bind(notFlattenable); 2939 do_oop_store(_masm, field, r0, IN_HEAP); 2940 __ b(Done); 2941 } else { 2942 Label isFlattenable, isFlattened, notBuffered, notBuffered2, rewriteNotFlattenable, rewriteFlattenable; 2943 __ test_field_is_flattenable(flags2, r10, isFlattenable); 2944 // Not flattenable case, covers not flattenable values and objects 2945 pop_and_check_object(obj); 2946 // Store into the field 2947 do_oop_store(_masm, field, r0, IN_HEAP); 2948 __ bind(rewriteNotFlattenable); 2949 if (rc == may_rewrite) { 2950 patch_bytecode(Bytecodes::_fast_aputfield, bc, r19, true, byte_no); 2951 } 2952 __ b(Done); 2953 // Implementation of the flattenable semantic 2954 __ bind(isFlattenable); 2955 __ null_check(r0); 2956 __ test_field_is_flattened(flags2, r10, isFlattened); 2957 // Not flattened case 2958 pop_and_check_object(obj); 2959 // Store into the field 2960 do_oop_store(_masm, field, r0, IN_HEAP); 2961 __ b(rewriteFlattenable); 2962 __ bind(isFlattened); 2963 pop_and_check_object(obj); 2964 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value), r0, off, obj); 2965 __ bind(rewriteFlattenable); 2966 if (rc == may_rewrite) { 2967 patch_bytecode(Bytecodes::_fast_qputfield, bc, r19, true, byte_no); 2968 } 2969 __ b(Done); 2970 } 2971 } // Valhalla 2972 } 2973 2974 __ bind(notObj); 2975 __ cmp(flags, (u1)itos); 2976 __ br(Assembler::NE, notInt); 2977 2978 // itos 2979 { 2980 __ pop(itos); 2981 if (!is_static) pop_and_check_object(obj); 2982 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg); 2983 if (rc == may_rewrite) { 2984 patch_bytecode(Bytecodes::_fast_iputfield, bc, r1, true, byte_no); 2985 } 2986 __ b(Done); 2987 } 2988 2989 __ bind(notInt); 2990 __ cmp(flags, (u1)ctos); 2991 __ br(Assembler::NE, notChar); 2992 2993 // ctos 2994 { 2995 __ pop(ctos); 2996 if (!is_static) pop_and_check_object(obj); 2997 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg); 2998 if (rc == may_rewrite) { 2999 patch_bytecode(Bytecodes::_fast_cputfield, bc, r1, true, byte_no); 3000 } 3001 __ b(Done); 3002 } 3003 3004 __ bind(notChar); 3005 __ cmp(flags, (u1)stos); 3006 __ br(Assembler::NE, notShort); 3007 3008 // stos 3009 { 3010 __ pop(stos); 3011 if (!is_static) pop_and_check_object(obj); 3012 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg); 3013 if (rc == may_rewrite) { 3014 patch_bytecode(Bytecodes::_fast_sputfield, bc, r1, true, byte_no); 3015 } 3016 __ b(Done); 3017 } 3018 3019 __ bind(notShort); 3020 __ cmp(flags, (u1)ltos); 3021 __ br(Assembler::NE, notLong); 3022 3023 // ltos 3024 { 3025 __ pop(ltos); 3026 if (!is_static) pop_and_check_object(obj); 3027 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg); 3028 if (rc == may_rewrite) { 3029 patch_bytecode(Bytecodes::_fast_lputfield, bc, r1, true, byte_no); 3030 } 3031 __ b(Done); 3032 } 3033 3034 __ bind(notLong); 3035 __ cmp(flags, (u1)ftos); 3036 __ br(Assembler::NE, notFloat); 3037 3038 // ftos 3039 { 3040 __ pop(ftos); 3041 if (!is_static) pop_and_check_object(obj); 3042 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg); 3043 if (rc == may_rewrite) { 3044 patch_bytecode(Bytecodes::_fast_fputfield, bc, r1, true, byte_no); 3045 } 3046 __ b(Done); 3047 } 3048 3049 __ bind(notFloat); 3050 #ifdef ASSERT 3051 __ cmp(flags, (u1)dtos); 3052 __ br(Assembler::NE, notDouble); 3053 #endif 3054 3055 // dtos 3056 { 3057 __ pop(dtos); 3058 if (!is_static) pop_and_check_object(obj); 3059 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg); 3060 if (rc == may_rewrite) { 3061 patch_bytecode(Bytecodes::_fast_dputfield, bc, r1, true, byte_no); 3062 } 3063 } 3064 3065 #ifdef ASSERT 3066 __ b(Done); 3067 3068 __ bind(notDouble); 3069 __ stop("Bad state"); 3070 #endif 3071 3072 __ bind(Done); 3073 3074 { 3075 Label notVolatile; 3076 __ tbz(r5, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3077 __ membar(MacroAssembler::StoreLoad); 3078 __ bind(notVolatile); 3079 } 3080 } 3081 3082 void TemplateTable::putfield(int byte_no) 3083 { 3084 putfield_or_static(byte_no, false); 3085 } 3086 3087 void TemplateTable::nofast_putfield(int byte_no) { 3088 putfield_or_static(byte_no, false, may_not_rewrite); 3089 } 3090 3091 void TemplateTable::putstatic(int byte_no) { 3092 putfield_or_static(byte_no, true); 3093 } 3094 3095 void TemplateTable::jvmti_post_fast_field_mod() 3096 { 3097 if (JvmtiExport::can_post_field_modification()) { 3098 // Check to see if a field modification watch has been set before 3099 // we take the time to call into the VM. 3100 Label L2; 3101 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 3102 __ ldrw(c_rarg3, Address(rscratch1)); 3103 __ cbzw(c_rarg3, L2); 3104 __ pop_ptr(r19); // copy the object pointer from tos 3105 __ verify_oop(r19); 3106 __ push_ptr(r19); // put the object pointer back on tos 3107 // Save tos values before call_VM() clobbers them. Since we have 3108 // to do it for every data type, we use the saved values as the 3109 // jvalue object. 3110 switch (bytecode()) { // load values into the jvalue object 3111 case Bytecodes::_fast_qputfield: //fall through 3112 case Bytecodes::_fast_aputfield: __ push_ptr(r0); break; 3113 case Bytecodes::_fast_bputfield: // fall through 3114 case Bytecodes::_fast_zputfield: // fall through 3115 case Bytecodes::_fast_sputfield: // fall through 3116 case Bytecodes::_fast_cputfield: // fall through 3117 case Bytecodes::_fast_iputfield: __ push_i(r0); break; 3118 case Bytecodes::_fast_dputfield: __ push_d(); break; 3119 case Bytecodes::_fast_fputfield: __ push_f(); break; 3120 case Bytecodes::_fast_lputfield: __ push_l(r0); break; 3121 3122 default: 3123 ShouldNotReachHere(); 3124 } 3125 __ mov(c_rarg3, esp); // points to jvalue on the stack 3126 // access constant pool cache entry 3127 __ get_cache_entry_pointer_at_bcp(c_rarg2, r0, 1); 3128 __ verify_oop(r19); 3129 // r19: object pointer copied above 3130 // c_rarg2: cache entry pointer 3131 // c_rarg3: jvalue object on the stack 3132 __ call_VM(noreg, 3133 CAST_FROM_FN_PTR(address, 3134 InterpreterRuntime::post_field_modification), 3135 r19, c_rarg2, c_rarg3); 3136 3137 switch (bytecode()) { // restore tos values 3138 case Bytecodes::_fast_qputfield: //fall through 3139 case Bytecodes::_fast_aputfield: __ pop_ptr(r0); break; 3140 case Bytecodes::_fast_bputfield: // fall through 3141 case Bytecodes::_fast_zputfield: // fall through 3142 case Bytecodes::_fast_sputfield: // fall through 3143 case Bytecodes::_fast_cputfield: // fall through 3144 case Bytecodes::_fast_iputfield: __ pop_i(r0); break; 3145 case Bytecodes::_fast_dputfield: __ pop_d(); break; 3146 case Bytecodes::_fast_fputfield: __ pop_f(); break; 3147 case Bytecodes::_fast_lputfield: __ pop_l(r0); break; 3148 default: break; 3149 } 3150 __ bind(L2); 3151 } 3152 } 3153 3154 void TemplateTable::fast_storefield(TosState state) 3155 { 3156 transition(state, vtos); 3157 3158 ByteSize base = ConstantPoolCache::base_offset(); 3159 3160 jvmti_post_fast_field_mod(); 3161 3162 // access constant pool cache 3163 __ get_cache_and_index_at_bcp(r2, r1, 1); 3164 3165 // test for volatile with r3 3166 __ ldrw(r3, Address(r2, in_bytes(base + 3167 ConstantPoolCacheEntry::flags_offset()))); 3168 3169 // replace index with field offset from cache entry 3170 __ ldr(r1, Address(r2, in_bytes(base + ConstantPoolCacheEntry::f2_offset()))); 3171 3172 { 3173 Label notVolatile; 3174 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3175 __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore); 3176 __ bind(notVolatile); 3177 } 3178 3179 Label notVolatile; 3180 3181 // Get object from stack 3182 pop_and_check_object(r2); 3183 3184 // field address 3185 const Address field(r2, r1); 3186 3187 // access field 3188 switch (bytecode()) { 3189 case Bytecodes::_fast_qputfield: //fall through 3190 { 3191 Label isFlattened, done; 3192 __ null_check(r0); 3193 __ test_field_is_flattened(r3, r10, isFlattened); 3194 // No Flattened case 3195 do_oop_store(_masm, field, r0, IN_HEAP); 3196 __ b(done); 3197 __ bind(isFlattened); 3198 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value), r0, r1, r2); 3199 __ bind(done); 3200 } 3201 break; 3202 case Bytecodes::_fast_aputfield: 3203 do_oop_store(_masm, field, r0, IN_HEAP); 3204 break; 3205 case Bytecodes::_fast_lputfield: 3206 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg); 3207 break; 3208 case Bytecodes::_fast_iputfield: 3209 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg); 3210 break; 3211 case Bytecodes::_fast_zputfield: 3212 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg); 3213 break; 3214 case Bytecodes::_fast_bputfield: 3215 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg); 3216 break; 3217 case Bytecodes::_fast_sputfield: 3218 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg); 3219 break; 3220 case Bytecodes::_fast_cputfield: 3221 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg); 3222 break; 3223 case Bytecodes::_fast_fputfield: 3224 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg); 3225 break; 3226 case Bytecodes::_fast_dputfield: 3227 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg); 3228 break; 3229 default: 3230 ShouldNotReachHere(); 3231 } 3232 3233 { 3234 Label notVolatile; 3235 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3236 __ membar(MacroAssembler::StoreLoad); 3237 __ bind(notVolatile); 3238 } 3239 } 3240 3241 3242 void TemplateTable::fast_accessfield(TosState state) 3243 { 3244 transition(atos, state); 3245 // Do the JVMTI work here to avoid disturbing the register state below 3246 if (JvmtiExport::can_post_field_access()) { 3247 // Check to see if a field access watch has been set before we 3248 // take the time to call into the VM. 3249 Label L1; 3250 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 3251 __ ldrw(r2, Address(rscratch1)); 3252 __ cbzw(r2, L1); 3253 // access constant pool cache entry 3254 __ get_cache_entry_pointer_at_bcp(c_rarg2, rscratch2, 1); 3255 __ verify_oop(r0); 3256 __ push_ptr(r0); // save object pointer before call_VM() clobbers it 3257 __ mov(c_rarg1, r0); 3258 // c_rarg1: object pointer copied above 3259 // c_rarg2: cache entry pointer 3260 __ call_VM(noreg, 3261 CAST_FROM_FN_PTR(address, 3262 InterpreterRuntime::post_field_access), 3263 c_rarg1, c_rarg2); 3264 __ pop_ptr(r0); // restore object pointer 3265 __ bind(L1); 3266 } 3267 3268 // access constant pool cache 3269 __ get_cache_and_index_at_bcp(r2, r1, 1); 3270 __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() + 3271 ConstantPoolCacheEntry::f2_offset()))); 3272 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() + 3273 ConstantPoolCacheEntry::flags_offset()))); 3274 3275 // r0: object 3276 __ verify_oop(r0); 3277 __ null_check(r0); 3278 const Address field(r0, r1); 3279 3280 // 8179954: We need to make sure that the code generated for 3281 // volatile accesses forms a sequentially-consistent set of 3282 // operations when combined with STLR and LDAR. Without a leading 3283 // membar it's possible for a simple Dekker test to fail if loads 3284 // use LDR;DMB but stores use STLR. This can happen if C2 compiles 3285 // the stores in one method and we interpret the loads in another. 3286 if (! UseBarriersForVolatile) { 3287 Label notVolatile; 3288 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3289 __ membar(MacroAssembler::AnyAny); 3290 __ bind(notVolatile); 3291 } 3292 3293 // access field 3294 switch (bytecode()) { 3295 case Bytecodes::_fast_qgetfield: 3296 { 3297 Label isFlattened, isInitialized, Done; 3298 // DMS CHECK: We don't need to reload multiple times, but stay close to original code 3299 __ ldrw(r10, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()))); 3300 __ test_field_is_flattened(r10, r10, isFlattened); 3301 // Non-flattened field case 3302 __ mov(r10, r0); 3303 __ load_heap_oop(r0, field); 3304 __ cbnz(r0, isInitialized); 3305 __ mov(r0, r10); 3306 __ ldrw(r10, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()))); 3307 __ andw(r10, r10, ConstantPoolCacheEntry::field_index_mask); 3308 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field), r0, r10); 3309 __ bind(isInitialized); 3310 __ verify_oop(r0); 3311 __ b(Done); 3312 __ bind(isFlattened); 3313 __ ldrw(r10, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()))); 3314 __ andw(r10, r10, ConstantPoolCacheEntry::field_index_mask); 3315 __ ldr(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f1_offset()))); 3316 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field), r0, r10, r3); 3317 __ verify_oop(r0); 3318 __ bind(Done); 3319 } 3320 break; 3321 case Bytecodes::_fast_agetfield: 3322 do_oop_load(_masm, field, r0, IN_HEAP); 3323 __ verify_oop(r0); 3324 break; 3325 case Bytecodes::_fast_lgetfield: 3326 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg); 3327 break; 3328 case Bytecodes::_fast_igetfield: 3329 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg); 3330 break; 3331 case Bytecodes::_fast_bgetfield: 3332 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg); 3333 break; 3334 case Bytecodes::_fast_sgetfield: 3335 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg); 3336 break; 3337 case Bytecodes::_fast_cgetfield: 3338 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg); 3339 break; 3340 case Bytecodes::_fast_fgetfield: 3341 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg); 3342 break; 3343 case Bytecodes::_fast_dgetfield: 3344 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg); 3345 break; 3346 default: 3347 ShouldNotReachHere(); 3348 } 3349 { 3350 Label notVolatile; 3351 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3352 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore); 3353 __ bind(notVolatile); 3354 } 3355 } 3356 3357 void TemplateTable::fast_xaccess(TosState state) 3358 { 3359 transition(vtos, state); 3360 3361 // get receiver 3362 __ ldr(r0, aaddress(0)); 3363 // access constant pool cache 3364 __ get_cache_and_index_at_bcp(r2, r3, 2); 3365 __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() + 3366 ConstantPoolCacheEntry::f2_offset()))); 3367 3368 // 8179954: We need to make sure that the code generated for 3369 // volatile accesses forms a sequentially-consistent set of 3370 // operations when combined with STLR and LDAR. Without a leading 3371 // membar it's possible for a simple Dekker test to fail if loads 3372 // use LDR;DMB but stores use STLR. This can happen if C2 compiles 3373 // the stores in one method and we interpret the loads in another. 3374 if (! UseBarriersForVolatile) { 3375 Label notVolatile; 3376 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() + 3377 ConstantPoolCacheEntry::flags_offset()))); 3378 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3379 __ membar(MacroAssembler::AnyAny); 3380 __ bind(notVolatile); 3381 } 3382 3383 // make sure exception is reported in correct bcp range (getfield is 3384 // next instruction) 3385 __ increment(rbcp); 3386 __ null_check(r0); 3387 switch (state) { 3388 case itos: 3389 __ access_load_at(T_INT, IN_HEAP, r0, Address(r0, r1, Address::lsl(0)), noreg, noreg); 3390 break; 3391 case atos: 3392 do_oop_load(_masm, Address(r0, r1, Address::lsl(0)), r0, IN_HEAP); 3393 __ verify_oop(r0); 3394 break; 3395 case ftos: 3396 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, Address(r0, r1, Address::lsl(0)), noreg, noreg); 3397 break; 3398 default: 3399 ShouldNotReachHere(); 3400 } 3401 3402 { 3403 Label notVolatile; 3404 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() + 3405 ConstantPoolCacheEntry::flags_offset()))); 3406 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile); 3407 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore); 3408 __ bind(notVolatile); 3409 } 3410 3411 __ decrement(rbcp); 3412 } 3413 3414 3415 3416 //----------------------------------------------------------------------------- 3417 // Calls 3418 3419 void TemplateTable::count_calls(Register method, Register temp) 3420 { 3421 __ call_Unimplemented(); 3422 } 3423 3424 void TemplateTable::prepare_invoke(int byte_no, 3425 Register method, // linked method (or i-klass) 3426 Register index, // itable index, MethodType, etc. 3427 Register recv, // if caller wants to see it 3428 Register flags // if caller wants to test it 3429 ) { 3430 // determine flags 3431 Bytecodes::Code code = bytecode(); 3432 const bool is_invokeinterface = code == Bytecodes::_invokeinterface; 3433 const bool is_invokedynamic = code == Bytecodes::_invokedynamic; 3434 const bool is_invokehandle = code == Bytecodes::_invokehandle; 3435 const bool is_invokevirtual = code == Bytecodes::_invokevirtual; 3436 const bool is_invokespecial = code == Bytecodes::_invokespecial; 3437 const bool load_receiver = (recv != noreg); 3438 const bool save_flags = (flags != noreg); 3439 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), ""); 3440 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal"); 3441 assert(flags == noreg || flags == r3, ""); 3442 assert(recv == noreg || recv == r2, ""); 3443 3444 // setup registers & access constant pool cache 3445 if (recv == noreg) recv = r2; 3446 if (flags == noreg) flags = r3; 3447 assert_different_registers(method, index, recv, flags); 3448 3449 // save 'interpreter return address' 3450 __ save_bcp(); 3451 3452 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic); 3453 3454 // maybe push appendix to arguments (just before return address) 3455 if (is_invokedynamic || is_invokehandle) { 3456 Label L_no_push; 3457 __ tbz(flags, ConstantPoolCacheEntry::has_appendix_shift, L_no_push); 3458 // Push the appendix as a trailing parameter. 3459 // This must be done before we get the receiver, 3460 // since the parameter_size includes it. 3461 __ push(r19); 3462 __ mov(r19, index); 3463 __ load_resolved_reference_at_index(index, r19); 3464 __ pop(r19); 3465 __ push(index); // push appendix (MethodType, CallSite, etc.) 3466 __ bind(L_no_push); 3467 } 3468 3469 // load receiver if needed (note: no return address pushed yet) 3470 if (load_receiver) { 3471 __ andw(recv, flags, ConstantPoolCacheEntry::parameter_size_mask); 3472 // FIXME -- is this actually correct? looks like it should be 2 3473 // const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address 3474 // const int receiver_is_at_end = -1; // back off one slot to get receiver 3475 // Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end); 3476 // __ movptr(recv, recv_addr); 3477 __ add(rscratch1, esp, recv, ext::uxtx, 3); // FIXME: uxtb here? 3478 __ ldr(recv, Address(rscratch1, -Interpreter::expr_offset_in_bytes(1))); 3479 __ verify_oop(recv); 3480 } 3481 3482 // compute return type 3483 // x86 uses a shift and mask or wings it with a shift plus assert 3484 // the mask is not needed. aarch64 just uses bitfield extract 3485 __ ubfxw(rscratch2, flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits); 3486 // load return address 3487 { 3488 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code); 3489 __ mov(rscratch1, table_addr); 3490 __ ldr(lr, Address(rscratch1, rscratch2, Address::lsl(3))); 3491 } 3492 } 3493 3494 3495 void TemplateTable::invokevirtual_helper(Register index, 3496 Register recv, 3497 Register flags) 3498 { 3499 // Uses temporary registers r0, r3 3500 assert_different_registers(index, recv, r0, r3); 3501 // Test for an invoke of a final method 3502 Label notFinal; 3503 __ tbz(flags, ConstantPoolCacheEntry::is_vfinal_shift, notFinal); 3504 3505 const Register method = index; // method must be rmethod 3506 assert(method == rmethod, 3507 "methodOop must be rmethod for interpreter calling convention"); 3508 3509 // do the call - the index is actually the method to call 3510 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method* 3511 3512 // It's final, need a null check here! 3513 __ null_check(recv); 3514 3515 // profile this call 3516 __ profile_final_call(r0); 3517 __ profile_arguments_type(r0, method, r4, true); 3518 3519 __ jump_from_interpreted(method, r0); 3520 3521 __ bind(notFinal); 3522 3523 // get receiver klass 3524 __ null_check(recv, oopDesc::klass_offset_in_bytes()); 3525 __ load_klass(r0, recv); 3526 3527 // profile this call 3528 __ profile_virtual_call(r0, rlocals, r3); 3529 3530 // get target methodOop & entry point 3531 __ lookup_virtual_method(r0, index, method); 3532 __ profile_arguments_type(r3, method, r4, true); 3533 // FIXME -- this looks completely redundant. is it? 3534 // __ ldr(r3, Address(method, Method::interpreter_entry_offset())); 3535 __ jump_from_interpreted(method, r3); 3536 } 3537 3538 void TemplateTable::invokevirtual(int byte_no) 3539 { 3540 transition(vtos, vtos); 3541 assert(byte_no == f2_byte, "use this argument"); 3542 3543 prepare_invoke(byte_no, rmethod, noreg, r2, r3); 3544 3545 // rmethod: index (actually a Method*) 3546 // r2: receiver 3547 // r3: flags 3548 3549 invokevirtual_helper(rmethod, r2, r3); 3550 } 3551 3552 void TemplateTable::invokespecial(int byte_no) 3553 { 3554 transition(vtos, vtos); 3555 assert(byte_no == f1_byte, "use this argument"); 3556 3557 prepare_invoke(byte_no, rmethod, noreg, // get f1 Method* 3558 r2); // get receiver also for null check 3559 __ verify_oop(r2); 3560 __ null_check(r2); 3561 // do the call 3562 __ profile_call(r0); 3563 __ profile_arguments_type(r0, rmethod, rbcp, false); 3564 __ jump_from_interpreted(rmethod, r0); 3565 } 3566 3567 void TemplateTable::invokestatic(int byte_no) 3568 { 3569 transition(vtos, vtos); 3570 assert(byte_no == f1_byte, "use this argument"); 3571 3572 prepare_invoke(byte_no, rmethod); // get f1 Method* 3573 // do the call 3574 __ profile_call(r0); 3575 __ profile_arguments_type(r0, rmethod, r4, false); 3576 __ jump_from_interpreted(rmethod, r0); 3577 } 3578 3579 void TemplateTable::fast_invokevfinal(int byte_no) 3580 { 3581 __ call_Unimplemented(); 3582 } 3583 3584 void TemplateTable::invokeinterface(int byte_no) { 3585 transition(vtos, vtos); 3586 assert(byte_no == f1_byte, "use this argument"); 3587 3588 prepare_invoke(byte_no, r0, rmethod, // get f1 Klass*, f2 Method* 3589 r2, r3); // recv, flags 3590 3591 // r0: interface klass (from f1) 3592 // rmethod: method (from f2) 3593 // r2: receiver 3594 // r3: flags 3595 3596 // First check for Object case, then private interface method, 3597 // then regular interface method. 3598 3599 // Special case of invokeinterface called for virtual method of 3600 // java.lang.Object. See cpCache.cpp for details. 3601 Label notObjectMethod; 3602 __ tbz(r3, ConstantPoolCacheEntry::is_forced_virtual_shift, notObjectMethod); 3603 3604 invokevirtual_helper(rmethod, r2, r3); 3605 __ bind(notObjectMethod); 3606 3607 Label no_such_interface; 3608 3609 // Check for private method invocation - indicated by vfinal 3610 Label notVFinal; 3611 __ tbz(r3, ConstantPoolCacheEntry::is_vfinal_shift, notVFinal); 3612 3613 // Get receiver klass into r3 - also a null check 3614 __ null_check(r2, oopDesc::klass_offset_in_bytes()); 3615 __ load_klass(r3, r2); 3616 3617 Label subtype; 3618 __ check_klass_subtype(r3, r0, r4, subtype); 3619 // If we get here the typecheck failed 3620 __ b(no_such_interface); 3621 __ bind(subtype); 3622 3623 __ profile_final_call(r0); 3624 __ profile_arguments_type(r0, rmethod, r4, true); 3625 __ jump_from_interpreted(rmethod, r0); 3626 3627 __ bind(notVFinal); 3628 3629 // Get receiver klass into r3 - also a null check 3630 __ restore_locals(); 3631 __ null_check(r2, oopDesc::klass_offset_in_bytes()); 3632 __ load_klass(r3, r2); 3633 3634 Label no_such_method; 3635 3636 // Preserve method for throw_AbstractMethodErrorVerbose. 3637 __ mov(r16, rmethod); 3638 // Receiver subtype check against REFC. 3639 // Superklass in r0. Subklass in r3. Blows rscratch2, r13 3640 __ lookup_interface_method(// inputs: rec. class, interface, itable index 3641 r3, r0, noreg, 3642 // outputs: scan temp. reg, scan temp. reg 3643 rscratch2, r13, 3644 no_such_interface, 3645 /*return_method=*/false); 3646 3647 // profile this call 3648 __ profile_virtual_call(r3, r13, r19); 3649 3650 // Get declaring interface class from method, and itable index 3651 __ ldr(r0, Address(rmethod, Method::const_offset())); 3652 __ ldr(r0, Address(r0, ConstMethod::constants_offset())); 3653 __ ldr(r0, Address(r0, ConstantPool::pool_holder_offset_in_bytes())); 3654 __ ldrw(rmethod, Address(rmethod, Method::itable_index_offset())); 3655 __ subw(rmethod, rmethod, Method::itable_index_max); 3656 __ negw(rmethod, rmethod); 3657 3658 // Preserve recvKlass for throw_AbstractMethodErrorVerbose. 3659 __ mov(rlocals, r3); 3660 __ lookup_interface_method(// inputs: rec. class, interface, itable index 3661 rlocals, r0, rmethod, 3662 // outputs: method, scan temp. reg 3663 rmethod, r13, 3664 no_such_interface); 3665 3666 // rmethod,: methodOop to call 3667 // r2: receiver 3668 // Check for abstract method error 3669 // Note: This should be done more efficiently via a throw_abstract_method_error 3670 // interpreter entry point and a conditional jump to it in case of a null 3671 // method. 3672 __ cbz(rmethod, no_such_method); 3673 3674 __ profile_arguments_type(r3, rmethod, r13, true); 3675 3676 // do the call 3677 // r2: receiver 3678 // rmethod,: methodOop 3679 __ jump_from_interpreted(rmethod, r3); 3680 __ should_not_reach_here(); 3681 3682 // exception handling code follows... 3683 // note: must restore interpreter registers to canonical 3684 // state for exception handling to work correctly! 3685 3686 __ bind(no_such_method); 3687 // throw exception 3688 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed) 3689 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3690 // Pass arguments for generating a verbose error message. 3691 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose), r3, r16); 3692 // the call_VM checks for exception, so we should never return here. 3693 __ should_not_reach_here(); 3694 3695 __ bind(no_such_interface); 3696 // throw exception 3697 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed) 3698 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3699 // Pass arguments for generating a verbose error message. 3700 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 3701 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose), r3, r0); 3702 // the call_VM checks for exception, so we should never return here. 3703 __ should_not_reach_here(); 3704 return; 3705 } 3706 3707 void TemplateTable::invokehandle(int byte_no) { 3708 transition(vtos, vtos); 3709 assert(byte_no == f1_byte, "use this argument"); 3710 3711 prepare_invoke(byte_no, rmethod, r0, r2); 3712 __ verify_method_ptr(r2); 3713 __ verify_oop(r2); 3714 __ null_check(r2); 3715 3716 // FIXME: profile the LambdaForm also 3717 3718 // r13 is safe to use here as a scratch reg because it is about to 3719 // be clobbered by jump_from_interpreted(). 3720 __ profile_final_call(r13); 3721 __ profile_arguments_type(r13, rmethod, r4, true); 3722 3723 __ jump_from_interpreted(rmethod, r0); 3724 } 3725 3726 void TemplateTable::invokedynamic(int byte_no) { 3727 transition(vtos, vtos); 3728 assert(byte_no == f1_byte, "use this argument"); 3729 3730 prepare_invoke(byte_no, rmethod, r0); 3731 3732 // r0: CallSite object (from cpool->resolved_references[]) 3733 // rmethod: MH.linkToCallSite method (from f2) 3734 3735 // Note: r0_callsite is already pushed by prepare_invoke 3736 3737 // %%% should make a type profile for any invokedynamic that takes a ref argument 3738 // profile this call 3739 __ profile_call(rbcp); 3740 __ profile_arguments_type(r3, rmethod, r13, false); 3741 3742 __ verify_oop(r0); 3743 3744 __ jump_from_interpreted(rmethod, r0); 3745 } 3746 3747 3748 //----------------------------------------------------------------------------- 3749 // Allocation 3750 3751 void TemplateTable::_new() { 3752 transition(vtos, atos); 3753 3754 __ get_unsigned_2_byte_index_at_bcp(r3, 1); 3755 Label slow_case; 3756 Label done; 3757 Label initialize_header; 3758 Label initialize_object; // including clearing the fields 3759 3760 __ get_cpool_and_tags(r4, r0); 3761 // Make sure the class we're about to instantiate has been resolved. 3762 // This is done before loading InstanceKlass to be consistent with the order 3763 // how Constant Pool is updated (see ConstantPool::klass_at_put) 3764 const int tags_offset = Array<u1>::base_offset_in_bytes(); 3765 __ lea(rscratch1, Address(r0, r3, Address::lsl(0))); 3766 __ lea(rscratch1, Address(rscratch1, tags_offset)); 3767 __ ldarb(rscratch1, rscratch1); 3768 __ cmp(rscratch1, (u1)JVM_CONSTANT_Class); 3769 __ br(Assembler::NE, slow_case); 3770 3771 // get InstanceKlass 3772 __ load_resolved_klass_at_offset(r4, r3, r4, rscratch1); 3773 3774 // make sure klass is initialized & doesn't have finalizer 3775 // make sure klass is fully initialized 3776 __ ldrb(rscratch1, Address(r4, InstanceKlass::init_state_offset())); 3777 __ cmp(rscratch1, (u1)InstanceKlass::fully_initialized); 3778 __ br(Assembler::NE, slow_case); 3779 3780 // get instance_size in InstanceKlass (scaled to a count of bytes) 3781 __ ldrw(r3, 3782 Address(r4, 3783 Klass::layout_helper_offset())); 3784 // test to see if it has a finalizer or is malformed in some way 3785 __ tbnz(r3, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case); 3786 3787 // Allocate the instance: 3788 // If TLAB is enabled: 3789 // Try to allocate in the TLAB. 3790 // If fails, go to the slow path. 3791 // Else If inline contiguous allocations are enabled: 3792 // Try to allocate in eden. 3793 // If fails due to heap end, go to slow path. 3794 // 3795 // If TLAB is enabled OR inline contiguous is enabled: 3796 // Initialize the allocation. 3797 // Exit. 3798 // 3799 // Go to slow path. 3800 const bool allow_shared_alloc = 3801 Universe::heap()->supports_inline_contig_alloc(); 3802 3803 if (UseTLAB) { 3804 __ tlab_allocate(r0, r3, 0, noreg, r1, slow_case); 3805 3806 if (ZeroTLAB) { 3807 // the fields have been already cleared 3808 __ b(initialize_header); 3809 } else { 3810 // initialize both the header and fields 3811 __ b(initialize_object); 3812 } 3813 } else { 3814 // Allocation in the shared Eden, if allowed. 3815 // 3816 // r3: instance size in bytes 3817 if (allow_shared_alloc) { 3818 __ eden_allocate(r0, r3, 0, r10, slow_case); 3819 } 3820 } 3821 3822 // If UseTLAB or allow_shared_alloc are true, the object is created above and 3823 // there is an initialize need. Otherwise, skip and go to the slow path. 3824 if (UseTLAB || allow_shared_alloc) { 3825 // The object is initialized before the header. If the object size is 3826 // zero, go directly to the header initialization. 3827 __ bind(initialize_object); 3828 __ sub(r3, r3, sizeof(oopDesc)); 3829 __ cbz(r3, initialize_header); 3830 3831 // Initialize object fields 3832 { 3833 __ add(r2, r0, sizeof(oopDesc)); 3834 Label loop; 3835 __ bind(loop); 3836 __ str(zr, Address(__ post(r2, BytesPerLong))); 3837 __ sub(r3, r3, BytesPerLong); 3838 __ cbnz(r3, loop); 3839 } 3840 3841 // initialize object header only. 3842 __ bind(initialize_header); 3843 if (UseBiasedLocking) { 3844 __ ldr(rscratch1, Address(r4, Klass::prototype_header_offset())); 3845 } else { 3846 __ mov(rscratch1, (intptr_t)markOopDesc::prototype()); 3847 } 3848 __ str(rscratch1, Address(r0, oopDesc::mark_offset_in_bytes())); 3849 __ store_klass_gap(r0, zr); // zero klass gap for compressed oops 3850 __ store_klass(r0, r4); // store klass last 3851 3852 { 3853 SkipIfEqual skip(_masm, &DTraceAllocProbes, false); 3854 // Trigger dtrace event for fastpath 3855 __ push(atos); // save the return value 3856 __ call_VM_leaf( 3857 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), r0); 3858 __ pop(atos); // restore the return value 3859 3860 } 3861 __ b(done); 3862 } 3863 3864 // slow case 3865 __ bind(slow_case); 3866 __ get_constant_pool(c_rarg1); 3867 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1); 3868 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), c_rarg1, c_rarg2); 3869 __ verify_oop(r0); 3870 3871 // continue 3872 __ bind(done); 3873 // Must prevent reordering of stores for object initialization with stores that publish the new object. 3874 __ membar(Assembler::StoreStore); 3875 } 3876 3877 void TemplateTable::defaultvalue() { 3878 transition(vtos, atos); 3879 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1); 3880 __ get_constant_pool(c_rarg1); 3881 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::defaultvalue), 3882 c_rarg1, c_rarg2); 3883 __ verify_oop(r0); 3884 // Must prevent reordering of stores for object initialization with stores that publish the new object. 3885 __ membar(Assembler::StoreStore); 3886 } 3887 3888 void TemplateTable::withfield() { 3889 transition(vtos, atos); 3890 resolve_cache_and_index(f2_byte, c_rarg1 /*cache*/, c_rarg2 /*index*/, sizeof(u2)); 3891 3892 // n.b. unlike x86 cache is now rcpool plus the indexed offset 3893 // so using rcpool to meet shared code expectations 3894 3895 call_VM(r1, CAST_FROM_FN_PTR(address, InterpreterRuntime::withfield), rcpool); 3896 __ verify_oop(r1); 3897 __ add(esp, esp, r0); 3898 __ mov(r0, r1); 3899 } 3900 3901 void TemplateTable::newarray() { 3902 transition(itos, atos); 3903 __ load_unsigned_byte(c_rarg1, at_bcp(1)); 3904 __ mov(c_rarg2, r0); 3905 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), 3906 c_rarg1, c_rarg2); 3907 // Must prevent reordering of stores for object initialization with stores that publish the new object. 3908 __ membar(Assembler::StoreStore); 3909 } 3910 3911 void TemplateTable::anewarray() { 3912 transition(itos, atos); 3913 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1); 3914 __ get_constant_pool(c_rarg1); 3915 __ mov(c_rarg3, r0); 3916 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), 3917 c_rarg1, c_rarg2, c_rarg3); 3918 // Must prevent reordering of stores for object initialization with stores that publish the new object. 3919 __ membar(Assembler::StoreStore); 3920 } 3921 3922 void TemplateTable::arraylength() { 3923 transition(atos, itos); 3924 __ null_check(r0, arrayOopDesc::length_offset_in_bytes()); 3925 __ ldrw(r0, Address(r0, arrayOopDesc::length_offset_in_bytes())); 3926 } 3927 3928 void TemplateTable::checkcast() 3929 { 3930 transition(atos, atos); 3931 Label done, is_null, ok_is_subtype, quicked, resolved; 3932 __ cbz(r0, is_null); 3933 3934 // Get cpool & tags index 3935 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array 3936 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index 3937 // See if bytecode has already been quicked 3938 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes()); 3939 __ lea(r1, Address(rscratch1, r19)); 3940 __ ldarb(r1, r1); 3941 __ cmp(r1, (u1)JVM_CONSTANT_Class); 3942 __ br(Assembler::EQ, quicked); 3943 3944 __ push(atos); // save receiver for result, and for GC 3945 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 3946 // vm_result_2 has metadata result 3947 __ get_vm_result_2(r0, rthread); 3948 __ pop(r3); // restore receiver 3949 __ b(resolved); 3950 3951 // Get superklass in r0 and subklass in r3 3952 __ bind(quicked); 3953 __ mov(r3, r0); // Save object in r3; r0 needed for subtype check 3954 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1); // r0 = klass 3955 3956 __ bind(resolved); 3957 __ load_klass(r19, r3); 3958 3959 // Generate subtype check. Blows r2, r5. Object in r3. 3960 // Superklass in r0. Subklass in r19. 3961 __ gen_subtype_check(r19, ok_is_subtype); 3962 3963 // Come here on failure 3964 __ push(r3); 3965 // object is at TOS 3966 __ b(Interpreter::_throw_ClassCastException_entry); 3967 3968 // Come here on success 3969 __ bind(ok_is_subtype); 3970 __ mov(r0, r3); // Restore object in r3 3971 3972 __ b(done); 3973 __ bind(is_null); 3974 3975 // Collect counts on whether this test sees NULLs a lot or not. 3976 if (ProfileInterpreter) { 3977 __ profile_null_seen(r2); 3978 } 3979 3980 if (EnableValhalla) { 3981 // Get cpool & tags index 3982 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array 3983 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index 3984 // See if bytecode has already been quicked 3985 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes()); 3986 __ lea(r1, Address(rscratch1, r19)); 3987 __ ldarb(r1, r1); 3988 // See if CP entry is a Q-descriptor 3989 __ andr (r1, r1, JVM_CONSTANT_QDESC_BIT); 3990 __ cmp(r1, (u1) JVM_CONSTANT_QDESC_BIT); 3991 __ br(Assembler::NE, done); 3992 __ b(ExternalAddress(Interpreter::_throw_NullPointerException_entry)); 3993 } 3994 3995 __ bind(done); 3996 } 3997 3998 void TemplateTable::instanceof() { 3999 transition(atos, itos); 4000 Label done, is_null, ok_is_subtype, quicked, resolved; 4001 __ cbz(r0, is_null); 4002 4003 // Get cpool & tags index 4004 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array 4005 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index 4006 // See if bytecode has already been quicked 4007 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes()); 4008 __ lea(r1, Address(rscratch1, r19)); 4009 __ ldarb(r1, r1); 4010 __ cmp(r1, (u1)JVM_CONSTANT_Class); 4011 __ br(Assembler::EQ, quicked); 4012 4013 __ push(atos); // save receiver for result, and for GC 4014 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 4015 // vm_result_2 has metadata result 4016 __ get_vm_result_2(r0, rthread); 4017 __ pop(r3); // restore receiver 4018 __ verify_oop(r3); 4019 __ load_klass(r3, r3); 4020 __ b(resolved); 4021 4022 // Get superklass in r0 and subklass in r3 4023 __ bind(quicked); 4024 __ load_klass(r3, r0); 4025 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1); 4026 4027 __ bind(resolved); 4028 4029 // Generate subtype check. Blows r2, r5 4030 // Superklass in r0. Subklass in r3. 4031 __ gen_subtype_check(r3, ok_is_subtype); 4032 4033 // Come here on failure 4034 __ mov(r0, 0); 4035 __ b(done); 4036 // Come here on success 4037 __ bind(ok_is_subtype); 4038 __ mov(r0, 1); 4039 4040 // Collect counts on whether this test sees NULLs a lot or not. 4041 if (ProfileInterpreter) { 4042 __ b(done); 4043 __ bind(is_null); 4044 __ profile_null_seen(r2); 4045 } else { 4046 __ bind(is_null); // same as 'done' 4047 } 4048 __ bind(done); 4049 // r0 = 0: obj == NULL or obj is not an instanceof the specified klass 4050 // r0 = 1: obj != NULL and obj is an instanceof the specified klass 4051 } 4052 4053 //----------------------------------------------------------------------------- 4054 // Breakpoints 4055 void TemplateTable::_breakpoint() { 4056 // Note: We get here even if we are single stepping.. 4057 // jbug inists on setting breakpoints at every bytecode 4058 // even if we are in single step mode. 4059 4060 transition(vtos, vtos); 4061 4062 // get the unpatched byte code 4063 __ get_method(c_rarg1); 4064 __ call_VM(noreg, 4065 CAST_FROM_FN_PTR(address, 4066 InterpreterRuntime::get_original_bytecode_at), 4067 c_rarg1, rbcp); 4068 __ mov(r19, r0); 4069 4070 // post the breakpoint event 4071 __ call_VM(noreg, 4072 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), 4073 rmethod, rbcp); 4074 4075 // complete the execution of original bytecode 4076 __ mov(rscratch1, r19); 4077 __ dispatch_only_normal(vtos); 4078 } 4079 4080 //----------------------------------------------------------------------------- 4081 // Exceptions 4082 4083 void TemplateTable::athrow() { 4084 transition(atos, vtos); 4085 __ null_check(r0); 4086 __ b(Interpreter::throw_exception_entry()); 4087 } 4088 4089 //----------------------------------------------------------------------------- 4090 // Synchronization 4091 // 4092 // Note: monitorenter & exit are symmetric routines; which is reflected 4093 // in the assembly code structure as well 4094 // 4095 // Stack layout: 4096 // 4097 // [expressions ] <--- esp = expression stack top 4098 // .. 4099 // [expressions ] 4100 // [monitor entry] <--- monitor block top = expression stack bot 4101 // .. 4102 // [monitor entry] 4103 // [frame data ] <--- monitor block bot 4104 // ... 4105 // [saved rbp ] <--- rbp 4106 void TemplateTable::monitorenter() 4107 { 4108 transition(atos, vtos); 4109 4110 // check for NULL object 4111 __ null_check(r0); 4112 4113 __ resolve(IS_NOT_NULL, r0); 4114 4115 const Address monitor_block_top( 4116 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4117 const Address monitor_block_bot( 4118 rfp, frame::interpreter_frame_initial_sp_offset * wordSize); 4119 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4120 4121 Label allocated; 4122 4123 // initialize entry pointer 4124 __ mov(c_rarg1, zr); // points to free slot or NULL 4125 4126 // find a free slot in the monitor block (result in c_rarg1) 4127 { 4128 Label entry, loop, exit; 4129 __ ldr(c_rarg3, monitor_block_top); // points to current entry, 4130 // starting with top-most entry 4131 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom 4132 4133 __ b(entry); 4134 4135 __ bind(loop); 4136 // check if current entry is used 4137 // if not used then remember entry in c_rarg1 4138 __ ldr(rscratch1, Address(c_rarg3, BasicObjectLock::obj_offset_in_bytes())); 4139 __ cmp(zr, rscratch1); 4140 __ csel(c_rarg1, c_rarg3, c_rarg1, Assembler::EQ); 4141 // check if current entry is for same object 4142 __ cmp(r0, rscratch1); 4143 // if same object then stop searching 4144 __ br(Assembler::EQ, exit); 4145 // otherwise advance to next entry 4146 __ add(c_rarg3, c_rarg3, entry_size); 4147 __ bind(entry); 4148 // check if bottom reached 4149 __ cmp(c_rarg3, c_rarg2); 4150 // if not at bottom then check this entry 4151 __ br(Assembler::NE, loop); 4152 __ bind(exit); 4153 } 4154 4155 __ cbnz(c_rarg1, allocated); // check if a slot has been found and 4156 // if found, continue with that on 4157 4158 // allocate one if there's no free slot 4159 { 4160 Label entry, loop; 4161 // 1. compute new pointers // rsp: old expression stack top 4162 __ ldr(c_rarg1, monitor_block_bot); // c_rarg1: old expression stack bottom 4163 __ sub(esp, esp, entry_size); // move expression stack top 4164 __ sub(c_rarg1, c_rarg1, entry_size); // move expression stack bottom 4165 __ mov(c_rarg3, esp); // set start value for copy loop 4166 __ str(c_rarg1, monitor_block_bot); // set new monitor block bottom 4167 4168 __ sub(sp, sp, entry_size); // make room for the monitor 4169 4170 __ b(entry); 4171 // 2. move expression stack contents 4172 __ bind(loop); 4173 __ ldr(c_rarg2, Address(c_rarg3, entry_size)); // load expression stack 4174 // word from old location 4175 __ str(c_rarg2, Address(c_rarg3, 0)); // and store it at new location 4176 __ add(c_rarg3, c_rarg3, wordSize); // advance to next word 4177 __ bind(entry); 4178 __ cmp(c_rarg3, c_rarg1); // check if bottom reached 4179 __ br(Assembler::NE, loop); // if not at bottom then 4180 // copy next word 4181 } 4182 4183 // call run-time routine 4184 // c_rarg1: points to monitor entry 4185 __ bind(allocated); 4186 4187 // Increment bcp to point to the next bytecode, so exception 4188 // handling for async. exceptions work correctly. 4189 // The object has already been poped from the stack, so the 4190 // expression stack looks correct. 4191 __ increment(rbcp); 4192 4193 // store object 4194 __ str(r0, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); 4195 __ lock_object(c_rarg1); 4196 4197 // check to make sure this monitor doesn't cause stack overflow after locking 4198 __ save_bcp(); // in case of exception 4199 __ generate_stack_overflow_check(0); 4200 4201 // The bcp has already been incremented. Just need to dispatch to 4202 // next instruction. 4203 __ dispatch_next(vtos); 4204 } 4205 4206 4207 void TemplateTable::monitorexit() 4208 { 4209 transition(atos, vtos); 4210 4211 // check for NULL object 4212 __ null_check(r0); 4213 4214 __ resolve(IS_NOT_NULL, r0); 4215 4216 const Address monitor_block_top( 4217 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 4218 const Address monitor_block_bot( 4219 rfp, frame::interpreter_frame_initial_sp_offset * wordSize); 4220 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 4221 4222 Label found; 4223 4224 // find matching slot 4225 { 4226 Label entry, loop; 4227 __ ldr(c_rarg1, monitor_block_top); // points to current entry, 4228 // starting with top-most entry 4229 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom 4230 // of monitor block 4231 __ b(entry); 4232 4233 __ bind(loop); 4234 // check if current entry is for same object 4235 __ ldr(rscratch1, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); 4236 __ cmp(r0, rscratch1); 4237 // if same object then stop searching 4238 __ br(Assembler::EQ, found); 4239 // otherwise advance to next entry 4240 __ add(c_rarg1, c_rarg1, entry_size); 4241 __ bind(entry); 4242 // check if bottom reached 4243 __ cmp(c_rarg1, c_rarg2); 4244 // if not at bottom then check this entry 4245 __ br(Assembler::NE, loop); 4246 } 4247 4248 // error handling. Unlocking was not block-structured 4249 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 4250 InterpreterRuntime::throw_illegal_monitor_state_exception)); 4251 __ should_not_reach_here(); 4252 4253 // call run-time routine 4254 __ bind(found); 4255 __ push_ptr(r0); // make sure object is on stack (contract with oopMaps) 4256 __ unlock_object(c_rarg1); 4257 __ pop_ptr(r0); // discard object 4258 } 4259 4260 4261 // Wide instructions 4262 void TemplateTable::wide() 4263 { 4264 __ load_unsigned_byte(r19, at_bcp(1)); 4265 __ mov(rscratch1, (address)Interpreter::_wentry_point); 4266 __ ldr(rscratch1, Address(rscratch1, r19, Address::uxtw(3))); 4267 __ br(rscratch1); 4268 } 4269 4270 4271 // Multi arrays 4272 void TemplateTable::multianewarray() { 4273 transition(vtos, atos); 4274 __ load_unsigned_byte(r0, at_bcp(3)); // get number of dimensions 4275 // last dim is on top of stack; we want address of first one: 4276 // first_addr = last_addr + (ndims - 1) * wordSize 4277 __ lea(c_rarg1, Address(esp, r0, Address::uxtw(3))); 4278 __ sub(c_rarg1, c_rarg1, wordSize); 4279 call_VM(r0, 4280 CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), 4281 c_rarg1); 4282 __ load_unsigned_byte(r1, at_bcp(3)); 4283 __ lea(esp, Address(esp, r1, Address::uxtw(3))); 4284 }