1 /* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 class BiasedLockingCounters; 26 27 // Contains all the definitions needed for x86 assembly code generation. 28 29 // Calling convention 30 class Argument VALUE_OBJ_CLASS_SPEC { 31 public: 32 enum { 33 #ifdef _LP64 34 #ifdef _WIN64 35 n_int_register_parameters_c = 4, // rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...) 36 n_float_register_parameters_c = 4, // xmm0 - xmm3 (c_farg0, c_farg1, ... ) 37 #else 38 n_int_register_parameters_c = 6, // rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...) 39 n_float_register_parameters_c = 8, // xmm0 - xmm7 (c_farg0, c_farg1, ... ) 40 #endif // _WIN64 41 n_int_register_parameters_j = 6, // j_rarg0, j_rarg1, ... 42 n_float_register_parameters_j = 8 // j_farg0, j_farg1, ... 43 #else 44 n_register_parameters = 0 // 0 registers used to pass arguments 45 #endif // _LP64 46 }; 47 }; 48 49 50 #ifdef _LP64 51 // Symbolically name the register arguments used by the c calling convention. 52 // Windows is different from linux/solaris. So much for standards... 53 54 #ifdef _WIN64 55 56 REGISTER_DECLARATION(Register, c_rarg0, rcx); 57 REGISTER_DECLARATION(Register, c_rarg1, rdx); 58 REGISTER_DECLARATION(Register, c_rarg2, r8); 59 REGISTER_DECLARATION(Register, c_rarg3, r9); 60 61 REGISTER_DECLARATION(XMMRegister, c_farg0, xmm0); 62 REGISTER_DECLARATION(XMMRegister, c_farg1, xmm1); 63 REGISTER_DECLARATION(XMMRegister, c_farg2, xmm2); 64 REGISTER_DECLARATION(XMMRegister, c_farg3, xmm3); 65 66 #else 67 68 REGISTER_DECLARATION(Register, c_rarg0, rdi); 69 REGISTER_DECLARATION(Register, c_rarg1, rsi); 70 REGISTER_DECLARATION(Register, c_rarg2, rdx); 71 REGISTER_DECLARATION(Register, c_rarg3, rcx); 72 REGISTER_DECLARATION(Register, c_rarg4, r8); 73 REGISTER_DECLARATION(Register, c_rarg5, r9); 74 75 REGISTER_DECLARATION(XMMRegister, c_farg0, xmm0); 76 REGISTER_DECLARATION(XMMRegister, c_farg1, xmm1); 77 REGISTER_DECLARATION(XMMRegister, c_farg2, xmm2); 78 REGISTER_DECLARATION(XMMRegister, c_farg3, xmm3); 79 REGISTER_DECLARATION(XMMRegister, c_farg4, xmm4); 80 REGISTER_DECLARATION(XMMRegister, c_farg5, xmm5); 81 REGISTER_DECLARATION(XMMRegister, c_farg6, xmm6); 82 REGISTER_DECLARATION(XMMRegister, c_farg7, xmm7); 83 84 #endif // _WIN64 85 86 // Symbolically name the register arguments used by the Java calling convention. 87 // We have control over the convention for java so we can do what we please. 88 // What pleases us is to offset the java calling convention so that when 89 // we call a suitable jni method the arguments are lined up and we don't 90 // have to do little shuffling. A suitable jni method is non-static and a 91 // small number of arguments (two fewer args on windows) 92 // 93 // |-------------------------------------------------------| 94 // | c_rarg0 c_rarg1 c_rarg2 c_rarg3 c_rarg4 c_rarg5 | 95 // |-------------------------------------------------------| 96 // | rcx rdx r8 r9 rdi* rsi* | windows (* not a c_rarg) 97 // | rdi rsi rdx rcx r8 r9 | solaris/linux 98 // |-------------------------------------------------------| 99 // | j_rarg5 j_rarg0 j_rarg1 j_rarg2 j_rarg3 j_rarg4 | 100 // |-------------------------------------------------------| 101 102 REGISTER_DECLARATION(Register, j_rarg0, c_rarg1); 103 REGISTER_DECLARATION(Register, j_rarg1, c_rarg2); 104 REGISTER_DECLARATION(Register, j_rarg2, c_rarg3); 105 // Windows runs out of register args here 106 #ifdef _WIN64 107 REGISTER_DECLARATION(Register, j_rarg3, rdi); 108 REGISTER_DECLARATION(Register, j_rarg4, rsi); 109 #else 110 REGISTER_DECLARATION(Register, j_rarg3, c_rarg4); 111 REGISTER_DECLARATION(Register, j_rarg4, c_rarg5); 112 #endif /* _WIN64 */ 113 REGISTER_DECLARATION(Register, j_rarg5, c_rarg0); 114 115 REGISTER_DECLARATION(XMMRegister, j_farg0, xmm0); 116 REGISTER_DECLARATION(XMMRegister, j_farg1, xmm1); 117 REGISTER_DECLARATION(XMMRegister, j_farg2, xmm2); 118 REGISTER_DECLARATION(XMMRegister, j_farg3, xmm3); 119 REGISTER_DECLARATION(XMMRegister, j_farg4, xmm4); 120 REGISTER_DECLARATION(XMMRegister, j_farg5, xmm5); 121 REGISTER_DECLARATION(XMMRegister, j_farg6, xmm6); 122 REGISTER_DECLARATION(XMMRegister, j_farg7, xmm7); 123 124 REGISTER_DECLARATION(Register, rscratch1, r10); // volatile 125 REGISTER_DECLARATION(Register, rscratch2, r11); // volatile 126 127 REGISTER_DECLARATION(Register, r12_heapbase, r12); // callee-saved 128 REGISTER_DECLARATION(Register, r15_thread, r15); // callee-saved 129 130 #else 131 // rscratch1 will apear in 32bit code that is dead but of course must compile 132 // Using noreg ensures if the dead code is incorrectly live and executed it 133 // will cause an assertion failure 134 #define rscratch1 noreg 135 136 #endif // _LP64 137 138 // JSR 292 fixed register usages: 139 REGISTER_DECLARATION(Register, rbp_mh_SP_save, rbp); 140 141 // Address is an abstraction used to represent a memory location 142 // using any of the amd64 addressing modes with one object. 143 // 144 // Note: A register location is represented via a Register, not 145 // via an address for efficiency & simplicity reasons. 146 147 class ArrayAddress; 148 149 class Address VALUE_OBJ_CLASS_SPEC { 150 public: 151 enum ScaleFactor { 152 no_scale = -1, 153 times_1 = 0, 154 times_2 = 1, 155 times_4 = 2, 156 times_8 = 3, 157 times_ptr = LP64_ONLY(times_8) NOT_LP64(times_4) 158 }; 159 static ScaleFactor times(int size) { 160 assert(size >= 1 && size <= 8 && is_power_of_2(size), "bad scale size"); 161 if (size == 8) return times_8; 162 if (size == 4) return times_4; 163 if (size == 2) return times_2; 164 return times_1; 165 } 166 static int scale_size(ScaleFactor scale) { 167 assert(scale != no_scale, ""); 168 assert(((1 << (int)times_1) == 1 && 169 (1 << (int)times_2) == 2 && 170 (1 << (int)times_4) == 4 && 171 (1 << (int)times_8) == 8), ""); 172 return (1 << (int)scale); 173 } 174 175 private: 176 Register _base; 177 Register _index; 178 ScaleFactor _scale; 179 int _disp; 180 RelocationHolder _rspec; 181 182 // Easily misused constructors make them private 183 // %%% can we make these go away? 184 NOT_LP64(Address(address loc, RelocationHolder spec);) 185 Address(int disp, address loc, relocInfo::relocType rtype); 186 Address(int disp, address loc, RelocationHolder spec); 187 188 public: 189 190 int disp() { return _disp; } 191 // creation 192 Address() 193 : _base(noreg), 194 _index(noreg), 195 _scale(no_scale), 196 _disp(0) { 197 } 198 199 // No default displacement otherwise Register can be implicitly 200 // converted to 0(Register) which is quite a different animal. 201 202 Address(Register base, int disp) 203 : _base(base), 204 _index(noreg), 205 _scale(no_scale), 206 _disp(disp) { 207 } 208 209 Address(Register base, Register index, ScaleFactor scale, int disp = 0) 210 : _base (base), 211 _index(index), 212 _scale(scale), 213 _disp (disp) { 214 assert(!index->is_valid() == (scale == Address::no_scale), 215 "inconsistent address"); 216 } 217 218 Address(Register base, RegisterOrConstant index, ScaleFactor scale = times_1, int disp = 0) 219 : _base (base), 220 _index(index.register_or_noreg()), 221 _scale(scale), 222 _disp (disp + (index.constant_or_zero() * scale_size(scale))) { 223 if (!index.is_register()) scale = Address::no_scale; 224 assert(!_index->is_valid() == (scale == Address::no_scale), 225 "inconsistent address"); 226 } 227 228 Address plus_disp(int disp) const { 229 Address a = (*this); 230 a._disp += disp; 231 return a; 232 } 233 234 // The following two overloads are used in connection with the 235 // ByteSize type (see sizes.hpp). They simplify the use of 236 // ByteSize'd arguments in assembly code. Note that their equivalent 237 // for the optimized build are the member functions with int disp 238 // argument since ByteSize is mapped to an int type in that case. 239 // 240 // Note: DO NOT introduce similar overloaded functions for WordSize 241 // arguments as in the optimized mode, both ByteSize and WordSize 242 // are mapped to the same type and thus the compiler cannot make a 243 // distinction anymore (=> compiler errors). 244 245 #ifdef ASSERT 246 Address(Register base, ByteSize disp) 247 : _base(base), 248 _index(noreg), 249 _scale(no_scale), 250 _disp(in_bytes(disp)) { 251 } 252 253 Address(Register base, Register index, ScaleFactor scale, ByteSize disp) 254 : _base(base), 255 _index(index), 256 _scale(scale), 257 _disp(in_bytes(disp)) { 258 assert(!index->is_valid() == (scale == Address::no_scale), 259 "inconsistent address"); 260 } 261 262 Address(Register base, RegisterOrConstant index, ScaleFactor scale, ByteSize disp) 263 : _base (base), 264 _index(index.register_or_noreg()), 265 _scale(scale), 266 _disp (in_bytes(disp) + (index.constant_or_zero() * scale_size(scale))) { 267 if (!index.is_register()) scale = Address::no_scale; 268 assert(!_index->is_valid() == (scale == Address::no_scale), 269 "inconsistent address"); 270 } 271 272 #endif // ASSERT 273 274 // accessors 275 bool uses(Register reg) const { return _base == reg || _index == reg; } 276 Register base() const { return _base; } 277 Register index() const { return _index; } 278 ScaleFactor scale() const { return _scale; } 279 int disp() const { return _disp; } 280 281 // Convert the raw encoding form into the form expected by the constructor for 282 // Address. An index of 4 (rsp) corresponds to having no index, so convert 283 // that to noreg for the Address constructor. 284 static Address make_raw(int base, int index, int scale, int disp, bool disp_is_oop); 285 286 static Address make_array(ArrayAddress); 287 288 private: 289 bool base_needs_rex() const { 290 return _base != noreg && _base->encoding() >= 8; 291 } 292 293 bool index_needs_rex() const { 294 return _index != noreg &&_index->encoding() >= 8; 295 } 296 297 relocInfo::relocType reloc() const { return _rspec.type(); } 298 299 friend class Assembler; 300 friend class MacroAssembler; 301 friend class LIR_Assembler; // base/index/scale/disp 302 }; 303 304 // 305 // AddressLiteral has been split out from Address because operands of this type 306 // need to be treated specially on 32bit vs. 64bit platforms. By splitting it out 307 // the few instructions that need to deal with address literals are unique and the 308 // MacroAssembler does not have to implement every instruction in the Assembler 309 // in order to search for address literals that may need special handling depending 310 // on the instruction and the platform. As small step on the way to merging i486/amd64 311 // directories. 312 // 313 class AddressLiteral VALUE_OBJ_CLASS_SPEC { 314 friend class ArrayAddress; 315 RelocationHolder _rspec; 316 // Typically we use AddressLiterals we want to use their rval 317 // However in some situations we want the lval (effect address) of the item. 318 // We provide a special factory for making those lvals. 319 bool _is_lval; 320 321 // If the target is far we'll need to load the ea of this to 322 // a register to reach it. Otherwise if near we can do rip 323 // relative addressing. 324 325 address _target; 326 327 protected: 328 // creation 329 AddressLiteral() 330 : _is_lval(false), 331 _target(NULL) 332 {} 333 334 public: 335 336 337 AddressLiteral(address target, relocInfo::relocType rtype); 338 339 AddressLiteral(address target, RelocationHolder const& rspec) 340 : _rspec(rspec), 341 _is_lval(false), 342 _target(target) 343 {} 344 345 AddressLiteral addr() { 346 AddressLiteral ret = *this; 347 ret._is_lval = true; 348 return ret; 349 } 350 351 352 private: 353 354 address target() { return _target; } 355 bool is_lval() { return _is_lval; } 356 357 relocInfo::relocType reloc() const { return _rspec.type(); } 358 const RelocationHolder& rspec() const { return _rspec; } 359 360 friend class Assembler; 361 friend class MacroAssembler; 362 friend class Address; 363 friend class LIR_Assembler; 364 }; 365 366 // Convience classes 367 class RuntimeAddress: public AddressLiteral { 368 369 public: 370 371 RuntimeAddress(address target) : AddressLiteral(target, relocInfo::runtime_call_type) {} 372 373 }; 374 375 class OopAddress: public AddressLiteral { 376 377 public: 378 379 OopAddress(address target) : AddressLiteral(target, relocInfo::oop_type){} 380 381 }; 382 383 class ExternalAddress: public AddressLiteral { 384 385 public: 386 387 ExternalAddress(address target) : AddressLiteral(target, relocInfo::external_word_type){} 388 389 }; 390 391 class InternalAddress: public AddressLiteral { 392 393 public: 394 395 InternalAddress(address target) : AddressLiteral(target, relocInfo::internal_word_type) {} 396 397 }; 398 399 // x86 can do array addressing as a single operation since disp can be an absolute 400 // address amd64 can't. We create a class that expresses the concept but does extra 401 // magic on amd64 to get the final result 402 403 class ArrayAddress VALUE_OBJ_CLASS_SPEC { 404 private: 405 406 AddressLiteral _base; 407 Address _index; 408 409 public: 410 411 ArrayAddress() {}; 412 ArrayAddress(AddressLiteral base, Address index): _base(base), _index(index) {}; 413 AddressLiteral base() { return _base; } 414 Address index() { return _index; } 415 416 }; 417 418 const int FPUStateSizeInWords = NOT_LP64(27) LP64_ONLY( 512 / wordSize); 419 420 // The Intel x86/Amd64 Assembler: Pure assembler doing NO optimizations on the instruction 421 // level (e.g. mov rax, 0 is not translated into xor rax, rax!); i.e., what you write 422 // is what you get. The Assembler is generating code into a CodeBuffer. 423 424 class Assembler : public AbstractAssembler { 425 friend class AbstractAssembler; // for the non-virtual hack 426 friend class LIR_Assembler; // as_Address() 427 friend class StubGenerator; 428 429 public: 430 enum Condition { // The x86 condition codes used for conditional jumps/moves. 431 zero = 0x4, 432 notZero = 0x5, 433 equal = 0x4, 434 notEqual = 0x5, 435 less = 0xc, 436 lessEqual = 0xe, 437 greater = 0xf, 438 greaterEqual = 0xd, 439 below = 0x2, 440 belowEqual = 0x6, 441 above = 0x7, 442 aboveEqual = 0x3, 443 overflow = 0x0, 444 noOverflow = 0x1, 445 carrySet = 0x2, 446 carryClear = 0x3, 447 negative = 0x8, 448 positive = 0x9, 449 parity = 0xa, 450 noParity = 0xb 451 }; 452 453 enum Prefix { 454 // segment overrides 455 CS_segment = 0x2e, 456 SS_segment = 0x36, 457 DS_segment = 0x3e, 458 ES_segment = 0x26, 459 FS_segment = 0x64, 460 GS_segment = 0x65, 461 462 REX = 0x40, 463 464 REX_B = 0x41, 465 REX_X = 0x42, 466 REX_XB = 0x43, 467 REX_R = 0x44, 468 REX_RB = 0x45, 469 REX_RX = 0x46, 470 REX_RXB = 0x47, 471 472 REX_W = 0x48, 473 474 REX_WB = 0x49, 475 REX_WX = 0x4A, 476 REX_WXB = 0x4B, 477 REX_WR = 0x4C, 478 REX_WRB = 0x4D, 479 REX_WRX = 0x4E, 480 REX_WRXB = 0x4F 481 }; 482 483 enum WhichOperand { 484 // input to locate_operand, and format code for relocations 485 imm_operand = 0, // embedded 32-bit|64-bit immediate operand 486 disp32_operand = 1, // embedded 32-bit displacement or address 487 call32_operand = 2, // embedded 32-bit self-relative displacement 488 #ifndef _LP64 489 _WhichOperand_limit = 3 490 #else 491 narrow_oop_operand = 3, // embedded 32-bit immediate narrow oop 492 _WhichOperand_limit = 4 493 #endif 494 }; 495 496 497 498 // NOTE: The general philopsophy of the declarations here is that 64bit versions 499 // of instructions are freely declared without the need for wrapping them an ifdef. 500 // (Some dangerous instructions are ifdef's out of inappropriate jvm's.) 501 // In the .cpp file the implementations are wrapped so that they are dropped out 502 // of the resulting jvm. This is done mostly to keep the footprint of KERNEL 503 // to the size it was prior to merging up the 32bit and 64bit assemblers. 504 // 505 // This does mean you'll get a linker/runtime error if you use a 64bit only instruction 506 // in a 32bit vm. This is somewhat unfortunate but keeps the ifdef noise down. 507 508 private: 509 510 511 // 64bit prefixes 512 int prefix_and_encode(int reg_enc, bool byteinst = false); 513 int prefixq_and_encode(int reg_enc); 514 515 int prefix_and_encode(int dst_enc, int src_enc, bool byteinst = false); 516 int prefixq_and_encode(int dst_enc, int src_enc); 517 518 void prefix(Register reg); 519 void prefix(Address adr); 520 void prefixq(Address adr); 521 522 void prefix(Address adr, Register reg, bool byteinst = false); 523 void prefixq(Address adr, Register reg); 524 525 void prefix(Address adr, XMMRegister reg); 526 527 void prefetch_prefix(Address src); 528 529 // Helper functions for groups of instructions 530 void emit_arith_b(int op1, int op2, Register dst, int imm8); 531 532 void emit_arith(int op1, int op2, Register dst, int32_t imm32); 533 // only 32bit?? 534 void emit_arith(int op1, int op2, Register dst, jobject obj); 535 void emit_arith(int op1, int op2, Register dst, Register src); 536 537 void emit_operand(Register reg, 538 Register base, Register index, Address::ScaleFactor scale, 539 int disp, 540 RelocationHolder const& rspec, 541 int rip_relative_correction = 0); 542 543 void emit_operand(Register reg, Address adr, int rip_relative_correction = 0); 544 545 // operands that only take the original 32bit registers 546 void emit_operand32(Register reg, Address adr); 547 548 void emit_operand(XMMRegister reg, 549 Register base, Register index, Address::ScaleFactor scale, 550 int disp, 551 RelocationHolder const& rspec); 552 553 void emit_operand(XMMRegister reg, Address adr); 554 555 void emit_operand(MMXRegister reg, Address adr); 556 557 // workaround gcc (3.2.1-7) bug 558 void emit_operand(Address adr, MMXRegister reg); 559 560 561 // Immediate-to-memory forms 562 void emit_arith_operand(int op1, Register rm, Address adr, int32_t imm32); 563 564 void emit_farith(int b1, int b2, int i); 565 566 567 protected: 568 #ifdef ASSERT 569 void check_relocation(RelocationHolder const& rspec, int format); 570 #endif 571 572 inline void emit_long64(jlong x); 573 574 void emit_data(jint data, relocInfo::relocType rtype, int format); 575 void emit_data(jint data, RelocationHolder const& rspec, int format); 576 void emit_data64(jlong data, relocInfo::relocType rtype, int format = 0); 577 void emit_data64(jlong data, RelocationHolder const& rspec, int format = 0); 578 579 580 bool reachable(AddressLiteral adr) NOT_LP64({ return true;}); 581 582 // These are all easily abused and hence protected 583 584 // 32BIT ONLY SECTION 585 #ifndef _LP64 586 // Make these disappear in 64bit mode since they would never be correct 587 void cmp_literal32(Register src1, int32_t imm32, RelocationHolder const& rspec); // 32BIT ONLY 588 void cmp_literal32(Address src1, int32_t imm32, RelocationHolder const& rspec); // 32BIT ONLY 589 590 void mov_literal32(Register dst, int32_t imm32, RelocationHolder const& rspec); // 32BIT ONLY 591 void mov_literal32(Address dst, int32_t imm32, RelocationHolder const& rspec); // 32BIT ONLY 592 593 void push_literal32(int32_t imm32, RelocationHolder const& rspec); // 32BIT ONLY 594 #else 595 // 64BIT ONLY SECTION 596 void mov_literal64(Register dst, intptr_t imm64, RelocationHolder const& rspec); // 64BIT ONLY 597 598 void cmp_narrow_oop(Register src1, int32_t imm32, RelocationHolder const& rspec); 599 void cmp_narrow_oop(Address src1, int32_t imm32, RelocationHolder const& rspec); 600 601 void mov_narrow_oop(Register dst, int32_t imm32, RelocationHolder const& rspec); 602 void mov_narrow_oop(Address dst, int32_t imm32, RelocationHolder const& rspec); 603 #endif // _LP64 604 605 // These are unique in that we are ensured by the caller that the 32bit 606 // relative in these instructions will always be able to reach the potentially 607 // 64bit address described by entry. Since they can take a 64bit address they 608 // don't have the 32 suffix like the other instructions in this class. 609 610 void call_literal(address entry, RelocationHolder const& rspec); 611 void jmp_literal(address entry, RelocationHolder const& rspec); 612 613 // Avoid using directly section 614 // Instructions in this section are actually usable by anyone without danger 615 // of failure but have performance issues that are addressed my enhanced 616 // instructions which will do the proper thing base on the particular cpu. 617 // We protect them because we don't trust you... 618 619 // Don't use next inc() and dec() methods directly. INC & DEC instructions 620 // could cause a partial flag stall since they don't set CF flag. 621 // Use MacroAssembler::decrement() & MacroAssembler::increment() methods 622 // which call inc() & dec() or add() & sub() in accordance with 623 // the product flag UseIncDec value. 624 625 void decl(Register dst); 626 void decl(Address dst); 627 void decq(Register dst); 628 void decq(Address dst); 629 630 void incl(Register dst); 631 void incl(Address dst); 632 void incq(Register dst); 633 void incq(Address dst); 634 635 // New cpus require use of movsd and movss to avoid partial register stall 636 // when loading from memory. But for old Opteron use movlpd instead of movsd. 637 // The selection is done in MacroAssembler::movdbl() and movflt(). 638 639 // Move Scalar Single-Precision Floating-Point Values 640 void movss(XMMRegister dst, Address src); 641 void movss(XMMRegister dst, XMMRegister src); 642 void movss(Address dst, XMMRegister src); 643 644 // Move Scalar Double-Precision Floating-Point Values 645 void movsd(XMMRegister dst, Address src); 646 void movsd(XMMRegister dst, XMMRegister src); 647 void movsd(Address dst, XMMRegister src); 648 void movlpd(XMMRegister dst, Address src); 649 650 // New cpus require use of movaps and movapd to avoid partial register stall 651 // when moving between registers. 652 void movaps(XMMRegister dst, XMMRegister src); 653 void movapd(XMMRegister dst, XMMRegister src); 654 655 // End avoid using directly 656 657 658 // Instruction prefixes 659 void prefix(Prefix p); 660 661 public: 662 663 // Creation 664 Assembler(CodeBuffer* code) : AbstractAssembler(code) {} 665 666 // Decoding 667 static address locate_operand(address inst, WhichOperand which); 668 static address locate_next_instruction(address inst); 669 670 // Utilities 671 672 #ifdef _LP64 673 static bool is_simm(int64_t x, int nbits) { return -( CONST64(1) << (nbits-1) ) <= x && x < ( CONST64(1) << (nbits-1) ); } 674 static bool is_simm32(int64_t x) { return x == (int64_t)(int32_t)x; } 675 #else 676 static bool is_simm(int32_t x, int nbits) { return -( 1 << (nbits-1) ) <= x && x < ( 1 << (nbits-1) ); } 677 static bool is_simm32(int32_t x) { return true; } 678 #endif // LP64 679 680 // Generic instructions 681 // Does 32bit or 64bit as needed for the platform. In some sense these 682 // belong in macro assembler but there is no need for both varieties to exist 683 684 void lea(Register dst, Address src); 685 686 void mov(Register dst, Register src); 687 688 void pusha(); 689 void popa(); 690 691 void pushf(); 692 void popf(); 693 694 void push(int32_t imm32); 695 696 void push(Register src); 697 698 void pop(Register dst); 699 700 // These are dummies to prevent surprise implicit conversions to Register 701 void push(void* v); 702 void pop(void* v); 703 704 705 // These do register sized moves/scans 706 void rep_mov(); 707 void rep_set(); 708 void repne_scan(); 709 #ifdef _LP64 710 void repne_scanl(); 711 #endif 712 713 // Vanilla instructions in lexical order 714 715 void adcl(Register dst, int32_t imm32); 716 void adcl(Register dst, Address src); 717 void adcl(Register dst, Register src); 718 719 void adcq(Register dst, int32_t imm32); 720 void adcq(Register dst, Address src); 721 void adcq(Register dst, Register src); 722 723 724 void addl(Address dst, int32_t imm32); 725 void addl(Address dst, Register src); 726 void addl(Register dst, int32_t imm32); 727 void addl(Register dst, Address src); 728 void addl(Register dst, Register src); 729 730 void addq(Address dst, int32_t imm32); 731 void addq(Address dst, Register src); 732 void addq(Register dst, int32_t imm32); 733 void addq(Register dst, Address src); 734 void addq(Register dst, Register src); 735 736 737 void addr_nop_4(); 738 void addr_nop_5(); 739 void addr_nop_7(); 740 void addr_nop_8(); 741 742 // Add Scalar Double-Precision Floating-Point Values 743 void addsd(XMMRegister dst, Address src); 744 void addsd(XMMRegister dst, XMMRegister src); 745 746 // Add Scalar Single-Precision Floating-Point Values 747 void addss(XMMRegister dst, Address src); 748 void addss(XMMRegister dst, XMMRegister src); 749 750 void andl(Register dst, int32_t imm32); 751 void andl(Register dst, Address src); 752 void andl(Register dst, Register src); 753 754 void andq(Register dst, int32_t imm32); 755 void andq(Register dst, Address src); 756 void andq(Register dst, Register src); 757 758 759 // Bitwise Logical AND of Packed Double-Precision Floating-Point Values 760 void andpd(XMMRegister dst, Address src); 761 void andpd(XMMRegister dst, XMMRegister src); 762 763 void bsfl(Register dst, Register src); 764 void bsrl(Register dst, Register src); 765 766 #ifdef _LP64 767 void bsfq(Register dst, Register src); 768 void bsrq(Register dst, Register src); 769 #endif 770 771 void bswapl(Register reg); 772 773 void bswapq(Register reg); 774 775 void call(Label& L, relocInfo::relocType rtype); 776 void call(Register reg); // push pc; pc <- reg 777 void call(Address adr); // push pc; pc <- adr 778 779 void cdql(); 780 781 void cdqq(); 782 783 void cld() { emit_byte(0xfc); } 784 785 void clflush(Address adr); 786 787 void cmovl(Condition cc, Register dst, Register src); 788 void cmovl(Condition cc, Register dst, Address src); 789 790 void cmovq(Condition cc, Register dst, Register src); 791 void cmovq(Condition cc, Register dst, Address src); 792 793 794 void cmpb(Address dst, int imm8); 795 796 void cmpl(Address dst, int32_t imm32); 797 798 void cmpl(Register dst, int32_t imm32); 799 void cmpl(Register dst, Register src); 800 void cmpl(Register dst, Address src); 801 802 void cmpq(Address dst, int32_t imm32); 803 void cmpq(Address dst, Register src); 804 805 void cmpq(Register dst, int32_t imm32); 806 void cmpq(Register dst, Register src); 807 void cmpq(Register dst, Address src); 808 809 // these are dummies used to catch attempting to convert NULL to Register 810 void cmpl(Register dst, void* junk); // dummy 811 void cmpq(Register dst, void* junk); // dummy 812 813 void cmpw(Address dst, int imm16); 814 815 void cmpxchg8 (Address adr); 816 817 void cmpxchgl(Register reg, Address adr); 818 819 void cmpxchgq(Register reg, Address adr); 820 821 // Ordered Compare Scalar Double-Precision Floating-Point Values and set EFLAGS 822 void comisd(XMMRegister dst, Address src); 823 824 // Ordered Compare Scalar Single-Precision Floating-Point Values and set EFLAGS 825 void comiss(XMMRegister dst, Address src); 826 827 // Identify processor type and features 828 void cpuid() { 829 emit_byte(0x0F); 830 emit_byte(0xA2); 831 } 832 833 // Convert Scalar Double-Precision Floating-Point Value to Scalar Single-Precision Floating-Point Value 834 void cvtsd2ss(XMMRegister dst, XMMRegister src); 835 836 // Convert Doubleword Integer to Scalar Double-Precision Floating-Point Value 837 void cvtsi2sdl(XMMRegister dst, Register src); 838 void cvtsi2sdq(XMMRegister dst, Register src); 839 840 // Convert Doubleword Integer to Scalar Single-Precision Floating-Point Value 841 void cvtsi2ssl(XMMRegister dst, Register src); 842 void cvtsi2ssq(XMMRegister dst, Register src); 843 844 // Convert Packed Signed Doubleword Integers to Packed Double-Precision Floating-Point Value 845 void cvtdq2pd(XMMRegister dst, XMMRegister src); 846 847 // Convert Packed Signed Doubleword Integers to Packed Single-Precision Floating-Point Value 848 void cvtdq2ps(XMMRegister dst, XMMRegister src); 849 850 // Convert Scalar Single-Precision Floating-Point Value to Scalar Double-Precision Floating-Point Value 851 void cvtss2sd(XMMRegister dst, XMMRegister src); 852 853 // Convert with Truncation Scalar Double-Precision Floating-Point Value to Doubleword Integer 854 void cvttsd2sil(Register dst, Address src); 855 void cvttsd2sil(Register dst, XMMRegister src); 856 void cvttsd2siq(Register dst, XMMRegister src); 857 858 // Convert with Truncation Scalar Single-Precision Floating-Point Value to Doubleword Integer 859 void cvttss2sil(Register dst, XMMRegister src); 860 void cvttss2siq(Register dst, XMMRegister src); 861 862 // Divide Scalar Double-Precision Floating-Point Values 863 void divsd(XMMRegister dst, Address src); 864 void divsd(XMMRegister dst, XMMRegister src); 865 866 // Divide Scalar Single-Precision Floating-Point Values 867 void divss(XMMRegister dst, Address src); 868 void divss(XMMRegister dst, XMMRegister src); 869 870 void emms(); 871 872 void fabs(); 873 874 void fadd(int i); 875 876 void fadd_d(Address src); 877 void fadd_s(Address src); 878 879 // "Alternate" versions of x87 instructions place result down in FPU 880 // stack instead of on TOS 881 882 void fadda(int i); // "alternate" fadd 883 void faddp(int i = 1); 884 885 void fchs(); 886 887 void fcom(int i); 888 889 void fcomp(int i = 1); 890 void fcomp_d(Address src); 891 void fcomp_s(Address src); 892 893 void fcompp(); 894 895 void fcos(); 896 897 void fdecstp(); 898 899 void fdiv(int i); 900 void fdiv_d(Address src); 901 void fdivr_s(Address src); 902 void fdiva(int i); // "alternate" fdiv 903 void fdivp(int i = 1); 904 905 void fdivr(int i); 906 void fdivr_d(Address src); 907 void fdiv_s(Address src); 908 909 void fdivra(int i); // "alternate" reversed fdiv 910 911 void fdivrp(int i = 1); 912 913 void ffree(int i = 0); 914 915 void fild_d(Address adr); 916 void fild_s(Address adr); 917 918 void fincstp(); 919 920 void finit(); 921 922 void fist_s (Address adr); 923 void fistp_d(Address adr); 924 void fistp_s(Address adr); 925 926 void fld1(); 927 928 void fld_d(Address adr); 929 void fld_s(Address adr); 930 void fld_s(int index); 931 void fld_x(Address adr); // extended-precision (80-bit) format 932 933 void fldcw(Address src); 934 935 void fldenv(Address src); 936 937 void fldlg2(); 938 939 void fldln2(); 940 941 void fldz(); 942 943 void flog(); 944 void flog10(); 945 946 void fmul(int i); 947 948 void fmul_d(Address src); 949 void fmul_s(Address src); 950 951 void fmula(int i); // "alternate" fmul 952 953 void fmulp(int i = 1); 954 955 void fnsave(Address dst); 956 957 void fnstcw(Address src); 958 959 void fnstsw_ax(); 960 961 void fprem(); 962 void fprem1(); 963 964 void frstor(Address src); 965 966 void fsin(); 967 968 void fsqrt(); 969 970 void fst_d(Address adr); 971 void fst_s(Address adr); 972 973 void fstp_d(Address adr); 974 void fstp_d(int index); 975 void fstp_s(Address adr); 976 void fstp_x(Address adr); // extended-precision (80-bit) format 977 978 void fsub(int i); 979 void fsub_d(Address src); 980 void fsub_s(Address src); 981 982 void fsuba(int i); // "alternate" fsub 983 984 void fsubp(int i = 1); 985 986 void fsubr(int i); 987 void fsubr_d(Address src); 988 void fsubr_s(Address src); 989 990 void fsubra(int i); // "alternate" reversed fsub 991 992 void fsubrp(int i = 1); 993 994 void ftan(); 995 996 void ftst(); 997 998 void fucomi(int i = 1); 999 void fucomip(int i = 1); 1000 1001 void fwait(); 1002 1003 void fxch(int i = 1); 1004 1005 void fxrstor(Address src); 1006 1007 void fxsave(Address dst); 1008 1009 void fyl2x(); 1010 1011 void hlt(); 1012 1013 void idivl(Register src); 1014 void divl(Register src); // Unsigned division 1015 1016 void idivq(Register src); 1017 1018 void imull(Register dst, Register src); 1019 void imull(Register dst, Register src, int value); 1020 1021 void imulq(Register dst, Register src); 1022 void imulq(Register dst, Register src, int value); 1023 1024 1025 // jcc is the generic conditional branch generator to run- 1026 // time routines, jcc is used for branches to labels. jcc 1027 // takes a branch opcode (cc) and a label (L) and generates 1028 // either a backward branch or a forward branch and links it 1029 // to the label fixup chain. Usage: 1030 // 1031 // Label L; // unbound label 1032 // jcc(cc, L); // forward branch to unbound label 1033 // bind(L); // bind label to the current pc 1034 // jcc(cc, L); // backward branch to bound label 1035 // bind(L); // illegal: a label may be bound only once 1036 // 1037 // Note: The same Label can be used for forward and backward branches 1038 // but it may be bound only once. 1039 1040 void jcc(Condition cc, Label& L, 1041 relocInfo::relocType rtype = relocInfo::none); 1042 1043 // Conditional jump to a 8-bit offset to L. 1044 // WARNING: be very careful using this for forward jumps. If the label is 1045 // not bound within an 8-bit offset of this instruction, a run-time error 1046 // will occur. 1047 void jccb(Condition cc, Label& L); 1048 1049 void jmp(Address entry); // pc <- entry 1050 1051 // Label operations & relative jumps (PPUM Appendix D) 1052 void jmp(Label& L, relocInfo::relocType rtype = relocInfo::none); // unconditional jump to L 1053 1054 void jmp(Register entry); // pc <- entry 1055 1056 // Unconditional 8-bit offset jump to L. 1057 // WARNING: be very careful using this for forward jumps. If the label is 1058 // not bound within an 8-bit offset of this instruction, a run-time error 1059 // will occur. 1060 void jmpb(Label& L); 1061 1062 void ldmxcsr( Address src ); 1063 1064 void leal(Register dst, Address src); 1065 1066 void leaq(Register dst, Address src); 1067 1068 void lfence() { 1069 emit_byte(0x0F); 1070 emit_byte(0xAE); 1071 emit_byte(0xE8); 1072 } 1073 1074 void lock(); 1075 1076 void lzcntl(Register dst, Register src); 1077 1078 #ifdef _LP64 1079 void lzcntq(Register dst, Register src); 1080 #endif 1081 1082 enum Membar_mask_bits { 1083 StoreStore = 1 << 3, 1084 LoadStore = 1 << 2, 1085 StoreLoad = 1 << 1, 1086 LoadLoad = 1 << 0 1087 }; 1088 1089 // Serializes memory and blows flags 1090 void membar(Membar_mask_bits order_constraint) { 1091 if (os::is_MP()) { 1092 // We only have to handle StoreLoad 1093 if (order_constraint & StoreLoad) { 1094 // All usable chips support "locked" instructions which suffice 1095 // as barriers, and are much faster than the alternative of 1096 // using cpuid instruction. We use here a locked add [esp],0. 1097 // This is conveniently otherwise a no-op except for blowing 1098 // flags. 1099 // Any change to this code may need to revisit other places in 1100 // the code where this idiom is used, in particular the 1101 // orderAccess code. 1102 lock(); 1103 addl(Address(rsp, 0), 0);// Assert the lock# signal here 1104 } 1105 } 1106 } 1107 1108 void mfence(); 1109 1110 // Moves 1111 1112 void mov64(Register dst, int64_t imm64); 1113 1114 void movb(Address dst, Register src); 1115 void movb(Address dst, int imm8); 1116 void movb(Register dst, Address src); 1117 1118 void movdl(XMMRegister dst, Register src); 1119 void movdl(Register dst, XMMRegister src); 1120 1121 // Move Double Quadword 1122 void movdq(XMMRegister dst, Register src); 1123 void movdq(Register dst, XMMRegister src); 1124 1125 // Move Aligned Double Quadword 1126 void movdqa(Address dst, XMMRegister src); 1127 void movdqa(XMMRegister dst, Address src); 1128 void movdqa(XMMRegister dst, XMMRegister src); 1129 1130 // Move Unaligned Double Quadword 1131 void movdqu(Address dst, XMMRegister src); 1132 void movdqu(XMMRegister dst, Address src); 1133 void movdqu(XMMRegister dst, XMMRegister src); 1134 1135 void movl(Register dst, int32_t imm32); 1136 void movl(Address dst, int32_t imm32); 1137 void movl(Register dst, Register src); 1138 void movl(Register dst, Address src); 1139 void movl(Address dst, Register src); 1140 1141 // These dummies prevent using movl from converting a zero (like NULL) into Register 1142 // by giving the compiler two choices it can't resolve 1143 1144 void movl(Address dst, void* junk); 1145 void movl(Register dst, void* junk); 1146 1147 #ifdef _LP64 1148 void movq(Register dst, Register src); 1149 void movq(Register dst, Address src); 1150 void movq(Address dst, Register src); 1151 #endif 1152 1153 void movq(Address dst, MMXRegister src ); 1154 void movq(MMXRegister dst, Address src ); 1155 1156 #ifdef _LP64 1157 // These dummies prevent using movq from converting a zero (like NULL) into Register 1158 // by giving the compiler two choices it can't resolve 1159 1160 void movq(Address dst, void* dummy); 1161 void movq(Register dst, void* dummy); 1162 #endif 1163 1164 // Move Quadword 1165 void movq(Address dst, XMMRegister src); 1166 void movq(XMMRegister dst, Address src); 1167 1168 void movsbl(Register dst, Address src); 1169 void movsbl(Register dst, Register src); 1170 1171 #ifdef _LP64 1172 void movsbq(Register dst, Address src); 1173 void movsbq(Register dst, Register src); 1174 1175 // Move signed 32bit immediate to 64bit extending sign 1176 void movslq(Address dst, int32_t imm64); 1177 void movslq(Register dst, int32_t imm64); 1178 1179 void movslq(Register dst, Address src); 1180 void movslq(Register dst, Register src); 1181 void movslq(Register dst, void* src); // Dummy declaration to cause NULL to be ambiguous 1182 #endif 1183 1184 void movswl(Register dst, Address src); 1185 void movswl(Register dst, Register src); 1186 1187 #ifdef _LP64 1188 void movswq(Register dst, Address src); 1189 void movswq(Register dst, Register src); 1190 #endif 1191 1192 void movw(Address dst, int imm16); 1193 void movw(Register dst, Address src); 1194 void movw(Address dst, Register src); 1195 1196 void movzbl(Register dst, Address src); 1197 void movzbl(Register dst, Register src); 1198 1199 #ifdef _LP64 1200 void movzbq(Register dst, Address src); 1201 void movzbq(Register dst, Register src); 1202 #endif 1203 1204 void movzwl(Register dst, Address src); 1205 void movzwl(Register dst, Register src); 1206 1207 #ifdef _LP64 1208 void movzwq(Register dst, Address src); 1209 void movzwq(Register dst, Register src); 1210 #endif 1211 1212 void mull(Address src); 1213 void mull(Register src); 1214 1215 // Multiply Scalar Double-Precision Floating-Point Values 1216 void mulsd(XMMRegister dst, Address src); 1217 void mulsd(XMMRegister dst, XMMRegister src); 1218 1219 // Multiply Scalar Single-Precision Floating-Point Values 1220 void mulss(XMMRegister dst, Address src); 1221 void mulss(XMMRegister dst, XMMRegister src); 1222 1223 void negl(Register dst); 1224 1225 #ifdef _LP64 1226 void negq(Register dst); 1227 #endif 1228 1229 void nop(int i = 1); 1230 1231 void notl(Register dst); 1232 1233 #ifdef _LP64 1234 void notq(Register dst); 1235 #endif 1236 1237 void orl(Address dst, int32_t imm32); 1238 void orl(Register dst, int32_t imm32); 1239 void orl(Register dst, Address src); 1240 void orl(Register dst, Register src); 1241 1242 void orq(Address dst, int32_t imm32); 1243 void orq(Register dst, int32_t imm32); 1244 void orq(Register dst, Address src); 1245 void orq(Register dst, Register src); 1246 1247 // SSE4.2 string instructions 1248 void pcmpestri(XMMRegister xmm1, XMMRegister xmm2, int imm8); 1249 void pcmpestri(XMMRegister xmm1, Address src, int imm8); 1250 1251 #ifndef _LP64 // no 32bit push/pop on amd64 1252 void popl(Address dst); 1253 #endif 1254 1255 #ifdef _LP64 1256 void popq(Address dst); 1257 #endif 1258 1259 void popcntl(Register dst, Address src); 1260 void popcntl(Register dst, Register src); 1261 1262 #ifdef _LP64 1263 void popcntq(Register dst, Address src); 1264 void popcntq(Register dst, Register src); 1265 #endif 1266 1267 // Prefetches (SSE, SSE2, 3DNOW only) 1268 1269 void prefetchnta(Address src); 1270 void prefetchr(Address src); 1271 void prefetcht0(Address src); 1272 void prefetcht1(Address src); 1273 void prefetcht2(Address src); 1274 void prefetchw(Address src); 1275 1276 // Shuffle Packed Doublewords 1277 void pshufd(XMMRegister dst, XMMRegister src, int mode); 1278 void pshufd(XMMRegister dst, Address src, int mode); 1279 1280 // Shuffle Packed Low Words 1281 void pshuflw(XMMRegister dst, XMMRegister src, int mode); 1282 void pshuflw(XMMRegister dst, Address src, int mode); 1283 1284 // Shift Right Logical Quadword Immediate 1285 void psrlq(XMMRegister dst, int shift); 1286 1287 // Logical Compare Double Quadword 1288 void ptest(XMMRegister dst, XMMRegister src); 1289 void ptest(XMMRegister dst, Address src); 1290 1291 // Interleave Low Bytes 1292 void punpcklbw(XMMRegister dst, XMMRegister src); 1293 1294 #ifndef _LP64 // no 32bit push/pop on amd64 1295 void pushl(Address src); 1296 #endif 1297 1298 void pushq(Address src); 1299 1300 // Xor Packed Byte Integer Values 1301 void pxor(XMMRegister dst, Address src); 1302 void pxor(XMMRegister dst, XMMRegister src); 1303 1304 void rcll(Register dst, int imm8); 1305 1306 void rclq(Register dst, int imm8); 1307 1308 void ret(int imm16); 1309 1310 void sahf(); 1311 1312 void sarl(Register dst, int imm8); 1313 void sarl(Register dst); 1314 1315 void sarq(Register dst, int imm8); 1316 void sarq(Register dst); 1317 1318 void sbbl(Address dst, int32_t imm32); 1319 void sbbl(Register dst, int32_t imm32); 1320 void sbbl(Register dst, Address src); 1321 void sbbl(Register dst, Register src); 1322 1323 void sbbq(Address dst, int32_t imm32); 1324 void sbbq(Register dst, int32_t imm32); 1325 void sbbq(Register dst, Address src); 1326 void sbbq(Register dst, Register src); 1327 1328 void setb(Condition cc, Register dst); 1329 1330 void shldl(Register dst, Register src); 1331 1332 void shll(Register dst, int imm8); 1333 void shll(Register dst); 1334 1335 void shlq(Register dst, int imm8); 1336 void shlq(Register dst); 1337 1338 void shrdl(Register dst, Register src); 1339 1340 void shrl(Register dst, int imm8); 1341 void shrl(Register dst); 1342 1343 void shrq(Register dst, int imm8); 1344 void shrq(Register dst); 1345 1346 void smovl(); // QQQ generic? 1347 1348 // Compute Square Root of Scalar Double-Precision Floating-Point Value 1349 void sqrtsd(XMMRegister dst, Address src); 1350 void sqrtsd(XMMRegister dst, XMMRegister src); 1351 1352 // Compute Square Root of Scalar Single-Precision Floating-Point Value 1353 void sqrtss(XMMRegister dst, Address src); 1354 void sqrtss(XMMRegister dst, XMMRegister src); 1355 1356 void std() { emit_byte(0xfd); } 1357 1358 void stmxcsr( Address dst ); 1359 1360 void subl(Address dst, int32_t imm32); 1361 void subl(Address dst, Register src); 1362 void subl(Register dst, int32_t imm32); 1363 void subl(Register dst, Address src); 1364 void subl(Register dst, Register src); 1365 1366 void subq(Address dst, int32_t imm32); 1367 void subq(Address dst, Register src); 1368 void subq(Register dst, int32_t imm32); 1369 void subq(Register dst, Address src); 1370 void subq(Register dst, Register src); 1371 1372 1373 // Subtract Scalar Double-Precision Floating-Point Values 1374 void subsd(XMMRegister dst, Address src); 1375 void subsd(XMMRegister dst, XMMRegister src); 1376 1377 // Subtract Scalar Single-Precision Floating-Point Values 1378 void subss(XMMRegister dst, Address src); 1379 void subss(XMMRegister dst, XMMRegister src); 1380 1381 void testb(Register dst, int imm8); 1382 1383 void testl(Register dst, int32_t imm32); 1384 void testl(Register dst, Register src); 1385 void testl(Register dst, Address src); 1386 1387 void testq(Register dst, int32_t imm32); 1388 void testq(Register dst, Register src); 1389 1390 1391 // Unordered Compare Scalar Double-Precision Floating-Point Values and set EFLAGS 1392 void ucomisd(XMMRegister dst, Address src); 1393 void ucomisd(XMMRegister dst, XMMRegister src); 1394 1395 // Unordered Compare Scalar Single-Precision Floating-Point Values and set EFLAGS 1396 void ucomiss(XMMRegister dst, Address src); 1397 void ucomiss(XMMRegister dst, XMMRegister src); 1398 1399 void xaddl(Address dst, Register src); 1400 1401 void xaddq(Address dst, Register src); 1402 1403 void xchgl(Register reg, Address adr); 1404 void xchgl(Register dst, Register src); 1405 1406 void xchgq(Register reg, Address adr); 1407 void xchgq(Register dst, Register src); 1408 1409 void xorl(Register dst, int32_t imm32); 1410 void xorl(Register dst, Address src); 1411 void xorl(Register dst, Register src); 1412 1413 void xorq(Register dst, Address src); 1414 void xorq(Register dst, Register src); 1415 1416 // Bitwise Logical XOR of Packed Double-Precision Floating-Point Values 1417 void xorpd(XMMRegister dst, Address src); 1418 void xorpd(XMMRegister dst, XMMRegister src); 1419 1420 // Bitwise Logical XOR of Packed Single-Precision Floating-Point Values 1421 void xorps(XMMRegister dst, Address src); 1422 void xorps(XMMRegister dst, XMMRegister src); 1423 1424 void set_byte_if_not_zero(Register dst); // sets reg to 1 if not zero, otherwise 0 1425 }; 1426 1427 1428 // MacroAssembler extends Assembler by frequently used macros. 1429 // 1430 // Instructions for which a 'better' code sequence exists depending 1431 // on arguments should also go in here. 1432 1433 class MacroAssembler: public Assembler { 1434 friend class LIR_Assembler; 1435 friend class Runtime1; // as_Address() 1436 protected: 1437 1438 Address as_Address(AddressLiteral adr); 1439 Address as_Address(ArrayAddress adr); 1440 1441 // Support for VM calls 1442 // 1443 // This is the base routine called by the different versions of call_VM_leaf. The interpreter 1444 // may customize this version by overriding it for its purposes (e.g., to save/restore 1445 // additional registers when doing a VM call). 1446 #ifdef CC_INTERP 1447 // c++ interpreter never wants to use interp_masm version of call_VM 1448 #define VIRTUAL 1449 #else 1450 #define VIRTUAL virtual 1451 #endif 1452 1453 VIRTUAL void call_VM_leaf_base( 1454 address entry_point, // the entry point 1455 int number_of_arguments // the number of arguments to pop after the call 1456 ); 1457 1458 // This is the base routine called by the different versions of call_VM. The interpreter 1459 // may customize this version by overriding it for its purposes (e.g., to save/restore 1460 // additional registers when doing a VM call). 1461 // 1462 // If no java_thread register is specified (noreg) than rdi will be used instead. call_VM_base 1463 // returns the register which contains the thread upon return. If a thread register has been 1464 // specified, the return value will correspond to that register. If no last_java_sp is specified 1465 // (noreg) than rsp will be used instead. 1466 VIRTUAL void call_VM_base( // returns the register containing the thread upon return 1467 Register oop_result, // where an oop-result ends up if any; use noreg otherwise 1468 Register java_thread, // the thread if computed before ; use noreg otherwise 1469 Register last_java_sp, // to set up last_Java_frame in stubs; use noreg otherwise 1470 address entry_point, // the entry point 1471 int number_of_arguments, // the number of arguments (w/o thread) to pop after the call 1472 bool check_exceptions // whether to check for pending exceptions after return 1473 ); 1474 1475 // These routines should emit JVMTI PopFrame and ForceEarlyReturn handling code. 1476 // The implementation is only non-empty for the InterpreterMacroAssembler, 1477 // as only the interpreter handles PopFrame and ForceEarlyReturn requests. 1478 virtual void check_and_handle_popframe(Register java_thread); 1479 virtual void check_and_handle_earlyret(Register java_thread); 1480 1481 void call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions = true); 1482 1483 // helpers for FPU flag access 1484 // tmp is a temporary register, if none is available use noreg 1485 void save_rax (Register tmp); 1486 void restore_rax(Register tmp); 1487 1488 public: 1489 MacroAssembler(CodeBuffer* code) : Assembler(code) {} 1490 1491 // Support for NULL-checks 1492 // 1493 // Generates code that causes a NULL OS exception if the content of reg is NULL. 1494 // If the accessed location is M[reg + offset] and the offset is known, provide the 1495 // offset. No explicit code generation is needed if the offset is within a certain 1496 // range (0 <= offset <= page_size). 1497 1498 void null_check(Register reg, int offset = -1); 1499 static bool needs_explicit_null_check(intptr_t offset); 1500 1501 // Required platform-specific helpers for Label::patch_instructions. 1502 // They _shadow_ the declarations in AbstractAssembler, which are undefined. 1503 void pd_patch_instruction(address branch, address target); 1504 #ifndef PRODUCT 1505 static void pd_print_patched_instruction(address branch); 1506 #endif 1507 1508 // The following 4 methods return the offset of the appropriate move instruction 1509 1510 // Support for fast byte/short loading with zero extension (depending on particular CPU) 1511 int load_unsigned_byte(Register dst, Address src); 1512 int load_unsigned_short(Register dst, Address src); 1513 1514 // Support for fast byte/short loading with sign extension (depending on particular CPU) 1515 int load_signed_byte(Register dst, Address src); 1516 int load_signed_short(Register dst, Address src); 1517 1518 // Support for sign-extension (hi:lo = extend_sign(lo)) 1519 void extend_sign(Register hi, Register lo); 1520 1521 // Loading values by size and signed-ness 1522 void load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed); 1523 1524 // Support for inc/dec with optimal instruction selection depending on value 1525 1526 void increment(Register reg, int value = 1) { LP64_ONLY(incrementq(reg, value)) NOT_LP64(incrementl(reg, value)) ; } 1527 void decrement(Register reg, int value = 1) { LP64_ONLY(decrementq(reg, value)) NOT_LP64(decrementl(reg, value)) ; } 1528 1529 void decrementl(Address dst, int value = 1); 1530 void decrementl(Register reg, int value = 1); 1531 1532 void decrementq(Register reg, int value = 1); 1533 void decrementq(Address dst, int value = 1); 1534 1535 void incrementl(Address dst, int value = 1); 1536 void incrementl(Register reg, int value = 1); 1537 1538 void incrementq(Register reg, int value = 1); 1539 void incrementq(Address dst, int value = 1); 1540 1541 1542 // Support optimal SSE move instructions. 1543 void movflt(XMMRegister dst, XMMRegister src) { 1544 if (UseXmmRegToRegMoveAll) { movaps(dst, src); return; } 1545 else { movss (dst, src); return; } 1546 } 1547 void movflt(XMMRegister dst, Address src) { movss(dst, src); } 1548 void movflt(XMMRegister dst, AddressLiteral src); 1549 void movflt(Address dst, XMMRegister src) { movss(dst, src); } 1550 1551 void movdbl(XMMRegister dst, XMMRegister src) { 1552 if (UseXmmRegToRegMoveAll) { movapd(dst, src); return; } 1553 else { movsd (dst, src); return; } 1554 } 1555 1556 void movdbl(XMMRegister dst, AddressLiteral src); 1557 1558 void movdbl(XMMRegister dst, Address src) { 1559 if (UseXmmLoadAndClearUpper) { movsd (dst, src); return; } 1560 else { movlpd(dst, src); return; } 1561 } 1562 void movdbl(Address dst, XMMRegister src) { movsd(dst, src); } 1563 1564 void incrementl(AddressLiteral dst); 1565 void incrementl(ArrayAddress dst); 1566 1567 // Alignment 1568 void align(int modulus); 1569 1570 // Misc 1571 void fat_nop(); // 5 byte nop 1572 1573 // Stack frame creation/removal 1574 void enter(); 1575 void leave(); 1576 1577 // Support for getting the JavaThread pointer (i.e.; a reference to thread-local information) 1578 // The pointer will be loaded into the thread register. 1579 void get_thread(Register thread); 1580 1581 1582 // Support for VM calls 1583 // 1584 // It is imperative that all calls into the VM are handled via the call_VM macros. 1585 // They make sure that the stack linkage is setup correctly. call_VM's correspond 1586 // to ENTRY/ENTRY_X entry points while call_VM_leaf's correspond to LEAF entry points. 1587 1588 1589 void call_VM(Register oop_result, 1590 address entry_point, 1591 bool check_exceptions = true); 1592 void call_VM(Register oop_result, 1593 address entry_point, 1594 Register arg_1, 1595 bool check_exceptions = true); 1596 void call_VM(Register oop_result, 1597 address entry_point, 1598 Register arg_1, Register arg_2, 1599 bool check_exceptions = true); 1600 void call_VM(Register oop_result, 1601 address entry_point, 1602 Register arg_1, Register arg_2, Register arg_3, 1603 bool check_exceptions = true); 1604 1605 // Overloadings with last_Java_sp 1606 void call_VM(Register oop_result, 1607 Register last_java_sp, 1608 address entry_point, 1609 int number_of_arguments = 0, 1610 bool check_exceptions = true); 1611 void call_VM(Register oop_result, 1612 Register last_java_sp, 1613 address entry_point, 1614 Register arg_1, bool 1615 check_exceptions = true); 1616 void call_VM(Register oop_result, 1617 Register last_java_sp, 1618 address entry_point, 1619 Register arg_1, Register arg_2, 1620 bool check_exceptions = true); 1621 void call_VM(Register oop_result, 1622 Register last_java_sp, 1623 address entry_point, 1624 Register arg_1, Register arg_2, Register arg_3, 1625 bool check_exceptions = true); 1626 1627 void call_VM_leaf(address entry_point, 1628 int number_of_arguments = 0); 1629 void call_VM_leaf(address entry_point, 1630 Register arg_1); 1631 void call_VM_leaf(address entry_point, 1632 Register arg_1, Register arg_2); 1633 void call_VM_leaf(address entry_point, 1634 Register arg_1, Register arg_2, Register arg_3); 1635 1636 // last Java Frame (fills frame anchor) 1637 void set_last_Java_frame(Register thread, 1638 Register last_java_sp, 1639 Register last_java_fp, 1640 address last_java_pc); 1641 1642 // thread in the default location (r15_thread on 64bit) 1643 void set_last_Java_frame(Register last_java_sp, 1644 Register last_java_fp, 1645 address last_java_pc); 1646 1647 void reset_last_Java_frame(Register thread, bool clear_fp, bool clear_pc); 1648 1649 // thread in the default location (r15_thread on 64bit) 1650 void reset_last_Java_frame(bool clear_fp, bool clear_pc); 1651 1652 // Stores 1653 void store_check(Register obj); // store check for obj - register is destroyed afterwards 1654 void store_check(Register obj, Address dst); // same as above, dst is exact store location (reg. is destroyed) 1655 1656 void g1_write_barrier_pre(Register obj, 1657 #ifndef _LP64 1658 Register thread, 1659 #endif 1660 Register tmp, 1661 Register tmp2, 1662 bool tosca_live); 1663 void g1_write_barrier_post(Register store_addr, 1664 Register new_val, 1665 #ifndef _LP64 1666 Register thread, 1667 #endif 1668 Register tmp, 1669 Register tmp2); 1670 1671 1672 // split store_check(Register obj) to enhance instruction interleaving 1673 void store_check_part_1(Register obj); 1674 void store_check_part_2(Register obj); 1675 1676 // C 'boolean' to Java boolean: x == 0 ? 0 : 1 1677 void c2bool(Register x); 1678 1679 // C++ bool manipulation 1680 1681 void movbool(Register dst, Address src); 1682 void movbool(Address dst, bool boolconst); 1683 void movbool(Address dst, Register src); 1684 void testbool(Register dst); 1685 1686 // oop manipulations 1687 void load_klass(Register dst, Register src); 1688 void store_klass(Register dst, Register src); 1689 1690 void load_heap_oop(Register dst, Address src); 1691 void store_heap_oop(Address dst, Register src); 1692 1693 // Used for storing NULL. All other oop constants should be 1694 // stored using routines that take a jobject. 1695 void store_heap_oop_null(Address dst); 1696 1697 void load_prototype_header(Register dst, Register src); 1698 1699 #ifdef _LP64 1700 void store_klass_gap(Register dst, Register src); 1701 1702 // This dummy is to prevent a call to store_heap_oop from 1703 // converting a zero (like NULL) into a Register by giving 1704 // the compiler two choices it can't resolve 1705 1706 void store_heap_oop(Address dst, void* dummy); 1707 1708 void encode_heap_oop(Register r); 1709 void decode_heap_oop(Register r); 1710 void encode_heap_oop_not_null(Register r); 1711 void decode_heap_oop_not_null(Register r); 1712 void encode_heap_oop_not_null(Register dst, Register src); 1713 void decode_heap_oop_not_null(Register dst, Register src); 1714 1715 void set_narrow_oop(Register dst, jobject obj); 1716 void set_narrow_oop(Address dst, jobject obj); 1717 void cmp_narrow_oop(Register dst, jobject obj); 1718 void cmp_narrow_oop(Address dst, jobject obj); 1719 1720 // if heap base register is used - reinit it with the correct value 1721 void reinit_heapbase(); 1722 1723 DEBUG_ONLY(void verify_heapbase(const char* msg);) 1724 1725 #endif // _LP64 1726 1727 // Int division/remainder for Java 1728 // (as idivl, but checks for special case as described in JVM spec.) 1729 // returns idivl instruction offset for implicit exception handling 1730 int corrected_idivl(Register reg); 1731 1732 // Long division/remainder for Java 1733 // (as idivq, but checks for special case as described in JVM spec.) 1734 // returns idivq instruction offset for implicit exception handling 1735 int corrected_idivq(Register reg); 1736 1737 void int3(); 1738 1739 // Long operation macros for a 32bit cpu 1740 // Long negation for Java 1741 void lneg(Register hi, Register lo); 1742 1743 // Long multiplication for Java 1744 // (destroys contents of eax, ebx, ecx and edx) 1745 void lmul(int x_rsp_offset, int y_rsp_offset); // rdx:rax = x * y 1746 1747 // Long shifts for Java 1748 // (semantics as described in JVM spec.) 1749 void lshl(Register hi, Register lo); // hi:lo << (rcx & 0x3f) 1750 void lshr(Register hi, Register lo, bool sign_extension = false); // hi:lo >> (rcx & 0x3f) 1751 1752 // Long compare for Java 1753 // (semantics as described in JVM spec.) 1754 void lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo); // x_hi = lcmp(x, y) 1755 1756 1757 // misc 1758 1759 // Sign extension 1760 void sign_extend_short(Register reg); 1761 void sign_extend_byte(Register reg); 1762 1763 // Division by power of 2, rounding towards 0 1764 void division_with_shift(Register reg, int shift_value); 1765 1766 // Compares the top-most stack entries on the FPU stack and sets the eflags as follows: 1767 // 1768 // CF (corresponds to C0) if x < y 1769 // PF (corresponds to C2) if unordered 1770 // ZF (corresponds to C3) if x = y 1771 // 1772 // The arguments are in reversed order on the stack (i.e., top of stack is first argument). 1773 // tmp is a temporary register, if none is available use noreg (only matters for non-P6 code) 1774 void fcmp(Register tmp); 1775 // Variant of the above which allows y to be further down the stack 1776 // and which only pops x and y if specified. If pop_right is 1777 // specified then pop_left must also be specified. 1778 void fcmp(Register tmp, int index, bool pop_left, bool pop_right); 1779 1780 // Floating-point comparison for Java 1781 // Compares the top-most stack entries on the FPU stack and stores the result in dst. 1782 // The arguments are in reversed order on the stack (i.e., top of stack is first argument). 1783 // (semantics as described in JVM spec.) 1784 void fcmp2int(Register dst, bool unordered_is_less); 1785 // Variant of the above which allows y to be further down the stack 1786 // and which only pops x and y if specified. If pop_right is 1787 // specified then pop_left must also be specified. 1788 void fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right); 1789 1790 // Floating-point remainder for Java (ST0 = ST0 fremr ST1, ST1 is empty afterwards) 1791 // tmp is a temporary register, if none is available use noreg 1792 void fremr(Register tmp); 1793 1794 1795 // same as fcmp2int, but using SSE2 1796 void cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less); 1797 void cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less); 1798 1799 // Inlined sin/cos generator for Java; must not use CPU instruction 1800 // directly on Intel as it does not have high enough precision 1801 // outside of the range [-pi/4, pi/4]. Extra argument indicate the 1802 // number of FPU stack slots in use; all but the topmost will 1803 // require saving if a slow case is necessary. Assumes argument is 1804 // on FP TOS; result is on FP TOS. No cpu registers are changed by 1805 // this code. 1806 void trigfunc(char trig, int num_fpu_regs_in_use = 1); 1807 1808 // branch to L if FPU flag C2 is set/not set 1809 // tmp is a temporary register, if none is available use noreg 1810 void jC2 (Register tmp, Label& L); 1811 void jnC2(Register tmp, Label& L); 1812 1813 // Pop ST (ffree & fincstp combined) 1814 void fpop(); 1815 1816 // pushes double TOS element of FPU stack on CPU stack; pops from FPU stack 1817 void push_fTOS(); 1818 1819 // pops double TOS element from CPU stack and pushes on FPU stack 1820 void pop_fTOS(); 1821 1822 void empty_FPU_stack(); 1823 1824 void push_IU_state(); 1825 void pop_IU_state(); 1826 1827 void push_FPU_state(); 1828 void pop_FPU_state(); 1829 1830 void push_CPU_state(); 1831 void pop_CPU_state(); 1832 1833 // Round up to a power of two 1834 void round_to(Register reg, int modulus); 1835 1836 // Callee saved registers handling 1837 void push_callee_saved_registers(); 1838 void pop_callee_saved_registers(); 1839 1840 // allocation 1841 void eden_allocate( 1842 Register obj, // result: pointer to object after successful allocation 1843 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 1844 int con_size_in_bytes, // object size in bytes if known at compile time 1845 Register t1, // temp register 1846 Label& slow_case // continuation point if fast allocation fails 1847 ); 1848 void tlab_allocate( 1849 Register obj, // result: pointer to object after successful allocation 1850 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 1851 int con_size_in_bytes, // object size in bytes if known at compile time 1852 Register t1, // temp register 1853 Register t2, // temp register 1854 Label& slow_case // continuation point if fast allocation fails 1855 ); 1856 void tlab_refill(Label& retry_tlab, Label& try_eden, Label& slow_case); 1857 1858 // interface method calling 1859 void lookup_interface_method(Register recv_klass, 1860 Register intf_klass, 1861 RegisterOrConstant itable_index, 1862 Register method_result, 1863 Register scan_temp, 1864 Label& no_such_interface); 1865 1866 // Test sub_klass against super_klass, with fast and slow paths. 1867 1868 // The fast path produces a tri-state answer: yes / no / maybe-slow. 1869 // One of the three labels can be NULL, meaning take the fall-through. 1870 // If super_check_offset is -1, the value is loaded up from super_klass. 1871 // No registers are killed, except temp_reg. 1872 void check_klass_subtype_fast_path(Register sub_klass, 1873 Register super_klass, 1874 Register temp_reg, 1875 Label* L_success, 1876 Label* L_failure, 1877 Label* L_slow_path, 1878 RegisterOrConstant super_check_offset = RegisterOrConstant(-1)); 1879 1880 // The rest of the type check; must be wired to a corresponding fast path. 1881 // It does not repeat the fast path logic, so don't use it standalone. 1882 // The temp_reg and temp2_reg can be noreg, if no temps are available. 1883 // Updates the sub's secondary super cache as necessary. 1884 // If set_cond_codes, condition codes will be Z on success, NZ on failure. 1885 void check_klass_subtype_slow_path(Register sub_klass, 1886 Register super_klass, 1887 Register temp_reg, 1888 Register temp2_reg, 1889 Label* L_success, 1890 Label* L_failure, 1891 bool set_cond_codes = false); 1892 1893 // Simplified, combined version, good for typical uses. 1894 // Falls through on failure. 1895 void check_klass_subtype(Register sub_klass, 1896 Register super_klass, 1897 Register temp_reg, 1898 Label& L_success); 1899 1900 // method handles (JSR 292) 1901 void check_method_handle_type(Register mtype_reg, Register mh_reg, 1902 Register temp_reg, 1903 Label& wrong_method_type); 1904 void load_method_handle_vmslots(Register vmslots_reg, Register mh_reg, 1905 Register temp_reg); 1906 void jump_to_method_handle_entry(Register mh_reg, Register temp_reg); 1907 Address argument_address(RegisterOrConstant arg_slot, int extra_slot_offset = 0); 1908 1909 1910 //---- 1911 void set_word_if_not_zero(Register reg); // sets reg to 1 if not zero, otherwise 0 1912 1913 // Debugging 1914 1915 // only if +VerifyOops 1916 void verify_oop(Register reg, const char* s = "broken oop"); 1917 void verify_oop_addr(Address addr, const char * s = "broken oop addr"); 1918 1919 // only if +VerifyFPU 1920 void verify_FPU(int stack_depth, const char* s = "illegal FPU state"); 1921 1922 // prints msg, dumps registers and stops execution 1923 void stop(const char* msg); 1924 1925 // prints msg and continues 1926 void warn(const char* msg); 1927 1928 static void debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg); 1929 static void debug64(char* msg, int64_t pc, int64_t regs[]); 1930 1931 void os_breakpoint(); 1932 1933 void untested() { stop("untested"); } 1934 1935 void unimplemented(const char* what = "") { char* b = new char[1024]; jio_snprintf(b, 1024, "unimplemented: %s", what); stop(b); } 1936 1937 void should_not_reach_here() { stop("should not reach here"); } 1938 1939 void print_CPU_state(); 1940 1941 // Stack overflow checking 1942 void bang_stack_with_offset(int offset) { 1943 // stack grows down, caller passes positive offset 1944 assert(offset > 0, "must bang with negative offset"); 1945 movl(Address(rsp, (-offset)), rax); 1946 } 1947 1948 // Writes to stack successive pages until offset reached to check for 1949 // stack overflow + shadow pages. Also, clobbers tmp 1950 void bang_stack_size(Register size, Register tmp); 1951 1952 virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr, 1953 Register tmp, 1954 int offset); 1955 1956 // Support for serializing memory accesses between threads 1957 void serialize_memory(Register thread, Register tmp); 1958 1959 void verify_tlab(); 1960 1961 // Biased locking support 1962 // lock_reg and obj_reg must be loaded up with the appropriate values. 1963 // swap_reg must be rax, and is killed. 1964 // tmp_reg is optional. If it is supplied (i.e., != noreg) it will 1965 // be killed; if not supplied, push/pop will be used internally to 1966 // allocate a temporary (inefficient, avoid if possible). 1967 // Optional slow case is for implementations (interpreter and C1) which branch to 1968 // slow case directly. Leaves condition codes set for C2's Fast_Lock node. 1969 // Returns offset of first potentially-faulting instruction for null 1970 // check info (currently consumed only by C1). If 1971 // swap_reg_contains_mark is true then returns -1 as it is assumed 1972 // the calling code has already passed any potential faults. 1973 int biased_locking_enter(Register lock_reg, Register obj_reg, 1974 Register swap_reg, Register tmp_reg, 1975 bool swap_reg_contains_mark, 1976 Label& done, Label* slow_case = NULL, 1977 BiasedLockingCounters* counters = NULL); 1978 void biased_locking_exit (Register obj_reg, Register temp_reg, Label& done); 1979 1980 1981 Condition negate_condition(Condition cond); 1982 1983 // Instructions that use AddressLiteral operands. These instruction can handle 32bit/64bit 1984 // operands. In general the names are modified to avoid hiding the instruction in Assembler 1985 // so that we don't need to implement all the varieties in the Assembler with trivial wrappers 1986 // here in MacroAssembler. The major exception to this rule is call 1987 1988 // Arithmetics 1989 1990 1991 void addptr(Address dst, int32_t src) { LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)) ; } 1992 void addptr(Address dst, Register src); 1993 1994 void addptr(Register dst, Address src) { LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); } 1995 void addptr(Register dst, int32_t src); 1996 void addptr(Register dst, Register src); 1997 1998 void andptr(Register dst, int32_t src); 1999 void andptr(Register src1, Register src2) { LP64_ONLY(andq(src1, src2)) NOT_LP64(andl(src1, src2)) ; } 2000 2001 void cmp8(AddressLiteral src1, int imm); 2002 2003 // renamed to drag out the casting of address to int32_t/intptr_t 2004 void cmp32(Register src1, int32_t imm); 2005 2006 void cmp32(AddressLiteral src1, int32_t imm); 2007 // compare reg - mem, or reg - &mem 2008 void cmp32(Register src1, AddressLiteral src2); 2009 2010 void cmp32(Register src1, Address src2); 2011 2012 #ifndef _LP64 2013 void cmpoop(Address dst, jobject obj); 2014 void cmpoop(Register dst, jobject obj); 2015 #endif // _LP64 2016 2017 // NOTE src2 must be the lval. This is NOT an mem-mem compare 2018 void cmpptr(Address src1, AddressLiteral src2); 2019 2020 void cmpptr(Register src1, AddressLiteral src2); 2021 2022 void cmpptr(Register src1, Register src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; } 2023 void cmpptr(Register src1, Address src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; } 2024 // void cmpptr(Address src1, Register src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; } 2025 2026 void cmpptr(Register src1, int32_t src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; } 2027 void cmpptr(Address src1, int32_t src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; } 2028 2029 // cmp64 to avoild hiding cmpq 2030 void cmp64(Register src1, AddressLiteral src); 2031 2032 void cmpxchgptr(Register reg, Address adr); 2033 2034 void locked_cmpxchgptr(Register reg, AddressLiteral adr); 2035 2036 2037 void imulptr(Register dst, Register src) { LP64_ONLY(imulq(dst, src)) NOT_LP64(imull(dst, src)); } 2038 2039 2040 void negptr(Register dst) { LP64_ONLY(negq(dst)) NOT_LP64(negl(dst)); } 2041 2042 void notptr(Register dst) { LP64_ONLY(notq(dst)) NOT_LP64(notl(dst)); } 2043 2044 void shlptr(Register dst, int32_t shift); 2045 void shlptr(Register dst) { LP64_ONLY(shlq(dst)) NOT_LP64(shll(dst)); } 2046 2047 void shrptr(Register dst, int32_t shift); 2048 void shrptr(Register dst) { LP64_ONLY(shrq(dst)) NOT_LP64(shrl(dst)); } 2049 2050 void sarptr(Register dst) { LP64_ONLY(sarq(dst)) NOT_LP64(sarl(dst)); } 2051 void sarptr(Register dst, int32_t src) { LP64_ONLY(sarq(dst, src)) NOT_LP64(sarl(dst, src)); } 2052 2053 void subptr(Address dst, int32_t src) { LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); } 2054 2055 void subptr(Register dst, Address src) { LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); } 2056 void subptr(Register dst, int32_t src); 2057 void subptr(Register dst, Register src); 2058 2059 2060 void sbbptr(Address dst, int32_t src) { LP64_ONLY(sbbq(dst, src)) NOT_LP64(sbbl(dst, src)); } 2061 void sbbptr(Register dst, int32_t src) { LP64_ONLY(sbbq(dst, src)) NOT_LP64(sbbl(dst, src)); } 2062 2063 void xchgptr(Register src1, Register src2) { LP64_ONLY(xchgq(src1, src2)) NOT_LP64(xchgl(src1, src2)) ; } 2064 void xchgptr(Register src1, Address src2) { LP64_ONLY(xchgq(src1, src2)) NOT_LP64(xchgl(src1, src2)) ; } 2065 2066 void xaddptr(Address src1, Register src2) { LP64_ONLY(xaddq(src1, src2)) NOT_LP64(xaddl(src1, src2)) ; } 2067 2068 2069 2070 // Helper functions for statistics gathering. 2071 // Conditionally (atomically, on MPs) increments passed counter address, preserving condition codes. 2072 void cond_inc32(Condition cond, AddressLiteral counter_addr); 2073 // Unconditional atomic increment. 2074 void atomic_incl(AddressLiteral counter_addr); 2075 2076 void lea(Register dst, AddressLiteral adr); 2077 void lea(Address dst, AddressLiteral adr); 2078 void lea(Register dst, Address adr) { Assembler::lea(dst, adr); } 2079 2080 void leal32(Register dst, Address src) { leal(dst, src); } 2081 2082 void test32(Register src1, AddressLiteral src2); 2083 2084 void orptr(Register dst, Address src) { LP64_ONLY(orq(dst, src)) NOT_LP64(orl(dst, src)); } 2085 void orptr(Register dst, Register src) { LP64_ONLY(orq(dst, src)) NOT_LP64(orl(dst, src)); } 2086 void orptr(Register dst, int32_t src) { LP64_ONLY(orq(dst, src)) NOT_LP64(orl(dst, src)); } 2087 2088 void testptr(Register src, int32_t imm32) { LP64_ONLY(testq(src, imm32)) NOT_LP64(testl(src, imm32)); } 2089 void testptr(Register src1, Register src2); 2090 2091 void xorptr(Register dst, Register src) { LP64_ONLY(xorq(dst, src)) NOT_LP64(xorl(dst, src)); } 2092 void xorptr(Register dst, Address src) { LP64_ONLY(xorq(dst, src)) NOT_LP64(xorl(dst, src)); } 2093 2094 // Calls 2095 2096 void call(Label& L, relocInfo::relocType rtype); 2097 void call(Register entry); 2098 2099 // NOTE: this call tranfers to the effective address of entry NOT 2100 // the address contained by entry. This is because this is more natural 2101 // for jumps/calls. 2102 void call(AddressLiteral entry); 2103 2104 // Jumps 2105 2106 // NOTE: these jumps tranfer to the effective address of dst NOT 2107 // the address contained by dst. This is because this is more natural 2108 // for jumps/calls. 2109 void jump(AddressLiteral dst); 2110 void jump_cc(Condition cc, AddressLiteral dst); 2111 2112 // 32bit can do a case table jump in one instruction but we no longer allow the base 2113 // to be installed in the Address class. This jump will tranfers to the address 2114 // contained in the location described by entry (not the address of entry) 2115 void jump(ArrayAddress entry); 2116 2117 // Floating 2118 2119 void andpd(XMMRegister dst, Address src) { Assembler::andpd(dst, src); } 2120 void andpd(XMMRegister dst, AddressLiteral src); 2121 2122 void comiss(XMMRegister dst, Address src) { Assembler::comiss(dst, src); } 2123 void comiss(XMMRegister dst, AddressLiteral src); 2124 2125 void comisd(XMMRegister dst, Address src) { Assembler::comisd(dst, src); } 2126 void comisd(XMMRegister dst, AddressLiteral src); 2127 2128 void fadd_s(Address src) { Assembler::fadd_s(src); } 2129 void fadd_s(AddressLiteral src) { Assembler::fadd_s(as_Address(src)); } 2130 2131 void fldcw(Address src) { Assembler::fldcw(src); } 2132 void fldcw(AddressLiteral src); 2133 2134 void fld_s(int index) { Assembler::fld_s(index); } 2135 void fld_s(Address src) { Assembler::fld_s(src); } 2136 void fld_s(AddressLiteral src); 2137 2138 void fld_d(Address src) { Assembler::fld_d(src); } 2139 void fld_d(AddressLiteral src); 2140 2141 void fld_x(Address src) { Assembler::fld_x(src); } 2142 void fld_x(AddressLiteral src); 2143 2144 void fmul_s(Address src) { Assembler::fmul_s(src); } 2145 void fmul_s(AddressLiteral src) { Assembler::fmul_s(as_Address(src)); } 2146 2147 void ldmxcsr(Address src) { Assembler::ldmxcsr(src); } 2148 void ldmxcsr(AddressLiteral src); 2149 2150 private: 2151 // these are private because users should be doing movflt/movdbl 2152 2153 void movss(Address dst, XMMRegister src) { Assembler::movss(dst, src); } 2154 void movss(XMMRegister dst, XMMRegister src) { Assembler::movss(dst, src); } 2155 void movss(XMMRegister dst, Address src) { Assembler::movss(dst, src); } 2156 void movss(XMMRegister dst, AddressLiteral src); 2157 2158 void movlpd(XMMRegister dst, Address src) {Assembler::movlpd(dst, src); } 2159 void movlpd(XMMRegister dst, AddressLiteral src); 2160 2161 public: 2162 2163 void addsd(XMMRegister dst, XMMRegister src) { Assembler::addsd(dst, src); } 2164 void addsd(XMMRegister dst, Address src) { Assembler::addsd(dst, src); } 2165 void addsd(XMMRegister dst, AddressLiteral src) { Assembler::addsd(dst, as_Address(src)); } 2166 2167 void addss(XMMRegister dst, XMMRegister src) { Assembler::addss(dst, src); } 2168 void addss(XMMRegister dst, Address src) { Assembler::addss(dst, src); } 2169 void addss(XMMRegister dst, AddressLiteral src) { Assembler::addss(dst, as_Address(src)); } 2170 2171 void divsd(XMMRegister dst, XMMRegister src) { Assembler::divsd(dst, src); } 2172 void divsd(XMMRegister dst, Address src) { Assembler::divsd(dst, src); } 2173 void divsd(XMMRegister dst, AddressLiteral src) { Assembler::divsd(dst, as_Address(src)); } 2174 2175 void divss(XMMRegister dst, XMMRegister src) { Assembler::divss(dst, src); } 2176 void divss(XMMRegister dst, Address src) { Assembler::divss(dst, src); } 2177 void divss(XMMRegister dst, AddressLiteral src) { Assembler::divss(dst, as_Address(src)); } 2178 2179 void movsd(XMMRegister dst, XMMRegister src) { Assembler::movsd(dst, src); } 2180 void movsd(Address dst, XMMRegister src) { Assembler::movsd(dst, src); } 2181 void movsd(XMMRegister dst, Address src) { Assembler::movsd(dst, src); } 2182 void movsd(XMMRegister dst, AddressLiteral src) { Assembler::movsd(dst, as_Address(src)); } 2183 2184 void mulsd(XMMRegister dst, XMMRegister src) { Assembler::mulsd(dst, src); } 2185 void mulsd(XMMRegister dst, Address src) { Assembler::mulsd(dst, src); } 2186 void mulsd(XMMRegister dst, AddressLiteral src) { Assembler::mulsd(dst, as_Address(src)); } 2187 2188 void mulss(XMMRegister dst, XMMRegister src) { Assembler::mulss(dst, src); } 2189 void mulss(XMMRegister dst, Address src) { Assembler::mulss(dst, src); } 2190 void mulss(XMMRegister dst, AddressLiteral src) { Assembler::mulss(dst, as_Address(src)); } 2191 2192 void sqrtsd(XMMRegister dst, XMMRegister src) { Assembler::sqrtsd(dst, src); } 2193 void sqrtsd(XMMRegister dst, Address src) { Assembler::sqrtsd(dst, src); } 2194 void sqrtsd(XMMRegister dst, AddressLiteral src) { Assembler::sqrtsd(dst, as_Address(src)); } 2195 2196 void sqrtss(XMMRegister dst, XMMRegister src) { Assembler::sqrtss(dst, src); } 2197 void sqrtss(XMMRegister dst, Address src) { Assembler::sqrtss(dst, src); } 2198 void sqrtss(XMMRegister dst, AddressLiteral src) { Assembler::sqrtss(dst, as_Address(src)); } 2199 2200 void subsd(XMMRegister dst, XMMRegister src) { Assembler::subsd(dst, src); } 2201 void subsd(XMMRegister dst, Address src) { Assembler::subsd(dst, src); } 2202 void subsd(XMMRegister dst, AddressLiteral src) { Assembler::subsd(dst, as_Address(src)); } 2203 2204 void subss(XMMRegister dst, XMMRegister src) { Assembler::subss(dst, src); } 2205 void subss(XMMRegister dst, Address src) { Assembler::subss(dst, src); } 2206 void subss(XMMRegister dst, AddressLiteral src) { Assembler::subss(dst, as_Address(src)); } 2207 2208 void ucomiss(XMMRegister dst, XMMRegister src) { Assembler::ucomiss(dst, src); } 2209 void ucomiss(XMMRegister dst, Address src) { Assembler::ucomiss(dst, src); } 2210 void ucomiss(XMMRegister dst, AddressLiteral src); 2211 2212 void ucomisd(XMMRegister dst, XMMRegister src) { Assembler::ucomisd(dst, src); } 2213 void ucomisd(XMMRegister dst, Address src) { Assembler::ucomisd(dst, src); } 2214 void ucomisd(XMMRegister dst, AddressLiteral src); 2215 2216 // Bitwise Logical XOR of Packed Double-Precision Floating-Point Values 2217 void xorpd(XMMRegister dst, XMMRegister src) { Assembler::xorpd(dst, src); } 2218 void xorpd(XMMRegister dst, Address src) { Assembler::xorpd(dst, src); } 2219 void xorpd(XMMRegister dst, AddressLiteral src); 2220 2221 // Bitwise Logical XOR of Packed Single-Precision Floating-Point Values 2222 void xorps(XMMRegister dst, XMMRegister src) { Assembler::xorps(dst, src); } 2223 void xorps(XMMRegister dst, Address src) { Assembler::xorps(dst, src); } 2224 void xorps(XMMRegister dst, AddressLiteral src); 2225 2226 // Data 2227 2228 void cmov(Condition cc, Register dst, Register src) { LP64_ONLY(cmovq(cc, dst, src)) NOT_LP64(cmovl(cc, dst, src)); } 2229 2230 void cmovptr(Condition cc, Register dst, Address src) { LP64_ONLY(cmovq(cc, dst, src)) NOT_LP64(cmovl(cc, dst, src)); } 2231 void cmovptr(Condition cc, Register dst, Register src) { LP64_ONLY(cmovq(cc, dst, src)) NOT_LP64(cmovl(cc, dst, src)); } 2232 2233 void movoop(Register dst, jobject obj); 2234 void movoop(Address dst, jobject obj); 2235 2236 void movptr(ArrayAddress dst, Register src); 2237 // can this do an lea? 2238 void movptr(Register dst, ArrayAddress src); 2239 2240 void movptr(Register dst, Address src); 2241 2242 void movptr(Register dst, AddressLiteral src); 2243 2244 void movptr(Register dst, intptr_t src); 2245 void movptr(Register dst, Register src); 2246 void movptr(Address dst, intptr_t src); 2247 2248 void movptr(Address dst, Register src); 2249 2250 #ifdef _LP64 2251 // Generally the next two are only used for moving NULL 2252 // Although there are situations in initializing the mark word where 2253 // they could be used. They are dangerous. 2254 2255 // They only exist on LP64 so that int32_t and intptr_t are not the same 2256 // and we have ambiguous declarations. 2257 2258 void movptr(Address dst, int32_t imm32); 2259 void movptr(Register dst, int32_t imm32); 2260 #endif // _LP64 2261 2262 // to avoid hiding movl 2263 void mov32(AddressLiteral dst, Register src); 2264 void mov32(Register dst, AddressLiteral src); 2265 2266 // to avoid hiding movb 2267 void movbyte(ArrayAddress dst, int src); 2268 2269 // Can push value or effective address 2270 void pushptr(AddressLiteral src); 2271 2272 void pushptr(Address src) { LP64_ONLY(pushq(src)) NOT_LP64(pushl(src)); } 2273 void popptr(Address src) { LP64_ONLY(popq(src)) NOT_LP64(popl(src)); } 2274 2275 void pushoop(jobject obj); 2276 2277 // sign extend as need a l to ptr sized element 2278 void movl2ptr(Register dst, Address src) { LP64_ONLY(movslq(dst, src)) NOT_LP64(movl(dst, src)); } 2279 void movl2ptr(Register dst, Register src) { LP64_ONLY(movslq(dst, src)) NOT_LP64(if (dst != src) movl(dst, src)); } 2280 2281 // IndexOf strings. 2282 void string_indexof(Register str1, Register str2, 2283 Register cnt1, Register cnt2, Register result, 2284 XMMRegister vec, Register tmp); 2285 2286 // Compare strings. 2287 void string_compare(Register str1, Register str2, 2288 Register cnt1, Register cnt2, Register result, 2289 XMMRegister vec1, XMMRegister vec2); 2290 2291 // Compare char[] arrays. 2292 void char_arrays_equals(bool is_array_equ, Register ary1, Register ary2, 2293 Register limit, Register result, Register chr, 2294 XMMRegister vec1, XMMRegister vec2); 2295 2296 // Fill primitive arrays 2297 void generate_fill(BasicType t, bool aligned, 2298 Register to, Register value, Register count, 2299 Register rtmp, XMMRegister xtmp); 2300 2301 #undef VIRTUAL 2302 2303 }; 2304 2305 /** 2306 * class SkipIfEqual: 2307 * 2308 * Instantiating this class will result in assembly code being output that will 2309 * jump around any code emitted between the creation of the instance and it's 2310 * automatic destruction at the end of a scope block, depending on the value of 2311 * the flag passed to the constructor, which will be checked at run-time. 2312 */ 2313 class SkipIfEqual { 2314 private: 2315 MacroAssembler* _masm; 2316 Label _label; 2317 2318 public: 2319 SkipIfEqual(MacroAssembler*, const bool* flag_addr, bool value); 2320 ~SkipIfEqual(); 2321 }; 2322 2323 #ifdef ASSERT 2324 inline bool AbstractAssembler::pd_check_instruction_mark() { return true; } 2325 #endif