1 /* 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_assembler_x86.cpp.incl" 27 28 // Implementation of AddressLiteral 29 30 AddressLiteral::AddressLiteral(address target, relocInfo::relocType rtype) { 31 _is_lval = false; 32 _target = target; 33 switch (rtype) { 34 case relocInfo::oop_type: 35 // Oops are a special case. Normally they would be their own section 36 // but in cases like icBuffer they are literals in the code stream that 37 // we don't have a section for. We use none so that we get a literal address 38 // which is always patchable. 39 break; 40 case relocInfo::external_word_type: 41 _rspec = external_word_Relocation::spec(target); 42 break; 43 case relocInfo::internal_word_type: 44 _rspec = internal_word_Relocation::spec(target); 45 break; 46 case relocInfo::opt_virtual_call_type: 47 _rspec = opt_virtual_call_Relocation::spec(); 48 break; 49 case relocInfo::static_call_type: 50 _rspec = static_call_Relocation::spec(); 51 break; 52 case relocInfo::runtime_call_type: 53 _rspec = runtime_call_Relocation::spec(); 54 break; 55 case relocInfo::poll_type: 56 case relocInfo::poll_return_type: 57 _rspec = Relocation::spec_simple(rtype); 58 break; 59 case relocInfo::none: 60 break; 61 default: 62 ShouldNotReachHere(); 63 break; 64 } 65 } 66 67 // Implementation of Address 68 69 #ifdef _LP64 70 71 Address Address::make_array(ArrayAddress adr) { 72 // Not implementable on 64bit machines 73 // Should have been handled higher up the call chain. 74 ShouldNotReachHere(); 75 return Address(); 76 } 77 78 // exceedingly dangerous constructor 79 Address::Address(int disp, address loc, relocInfo::relocType rtype) { 80 _base = noreg; 81 _index = noreg; 82 _scale = no_scale; 83 _disp = disp; 84 switch (rtype) { 85 case relocInfo::external_word_type: 86 _rspec = external_word_Relocation::spec(loc); 87 break; 88 case relocInfo::internal_word_type: 89 _rspec = internal_word_Relocation::spec(loc); 90 break; 91 case relocInfo::runtime_call_type: 92 // HMM 93 _rspec = runtime_call_Relocation::spec(); 94 break; 95 case relocInfo::poll_type: 96 case relocInfo::poll_return_type: 97 _rspec = Relocation::spec_simple(rtype); 98 break; 99 case relocInfo::none: 100 break; 101 default: 102 ShouldNotReachHere(); 103 } 104 } 105 #else // LP64 106 107 Address Address::make_array(ArrayAddress adr) { 108 AddressLiteral base = adr.base(); 109 Address index = adr.index(); 110 assert(index._disp == 0, "must not have disp"); // maybe it can? 111 Address array(index._base, index._index, index._scale, (intptr_t) base.target()); 112 array._rspec = base._rspec; 113 return array; 114 } 115 116 // exceedingly dangerous constructor 117 Address::Address(address loc, RelocationHolder spec) { 118 _base = noreg; 119 _index = noreg; 120 _scale = no_scale; 121 _disp = (intptr_t) loc; 122 _rspec = spec; 123 } 124 125 #endif // _LP64 126 127 128 129 // Convert the raw encoding form into the form expected by the constructor for 130 // Address. An index of 4 (rsp) corresponds to having no index, so convert 131 // that to noreg for the Address constructor. 132 Address Address::make_raw(int base, int index, int scale, int disp, bool disp_is_oop) { 133 RelocationHolder rspec; 134 if (disp_is_oop) { 135 rspec = Relocation::spec_simple(relocInfo::oop_type); 136 } 137 bool valid_index = index != rsp->encoding(); 138 if (valid_index) { 139 Address madr(as_Register(base), as_Register(index), (Address::ScaleFactor)scale, in_ByteSize(disp)); 140 madr._rspec = rspec; 141 return madr; 142 } else { 143 Address madr(as_Register(base), noreg, Address::no_scale, in_ByteSize(disp)); 144 madr._rspec = rspec; 145 return madr; 146 } 147 } 148 149 // Implementation of Assembler 150 151 int AbstractAssembler::code_fill_byte() { 152 return (u_char)'\xF4'; // hlt 153 } 154 155 // make this go away someday 156 void Assembler::emit_data(jint data, relocInfo::relocType rtype, int format) { 157 if (rtype == relocInfo::none) 158 emit_long(data); 159 else emit_data(data, Relocation::spec_simple(rtype), format); 160 } 161 162 void Assembler::emit_data(jint data, RelocationHolder const& rspec, int format) { 163 assert(imm_operand == 0, "default format must be immediate in this file"); 164 assert(inst_mark() != NULL, "must be inside InstructionMark"); 165 if (rspec.type() != relocInfo::none) { 166 #ifdef ASSERT 167 check_relocation(rspec, format); 168 #endif 169 // Do not use AbstractAssembler::relocate, which is not intended for 170 // embedded words. Instead, relocate to the enclosing instruction. 171 172 // hack. call32 is too wide for mask so use disp32 173 if (format == call32_operand) 174 code_section()->relocate(inst_mark(), rspec, disp32_operand); 175 else 176 code_section()->relocate(inst_mark(), rspec, format); 177 } 178 emit_long(data); 179 } 180 181 static int encode(Register r) { 182 int enc = r->encoding(); 183 if (enc >= 8) { 184 enc -= 8; 185 } 186 return enc; 187 } 188 189 static int encode(XMMRegister r) { 190 int enc = r->encoding(); 191 if (enc >= 8) { 192 enc -= 8; 193 } 194 return enc; 195 } 196 197 void Assembler::emit_arith_b(int op1, int op2, Register dst, int imm8) { 198 assert(dst->has_byte_register(), "must have byte register"); 199 assert(isByte(op1) && isByte(op2), "wrong opcode"); 200 assert(isByte(imm8), "not a byte"); 201 assert((op1 & 0x01) == 0, "should be 8bit operation"); 202 emit_byte(op1); 203 emit_byte(op2 | encode(dst)); 204 emit_byte(imm8); 205 } 206 207 208 void Assembler::emit_arith(int op1, int op2, Register dst, int32_t imm32) { 209 assert(isByte(op1) && isByte(op2), "wrong opcode"); 210 assert((op1 & 0x01) == 1, "should be 32bit operation"); 211 assert((op1 & 0x02) == 0, "sign-extension bit should not be set"); 212 if (is8bit(imm32)) { 213 emit_byte(op1 | 0x02); // set sign bit 214 emit_byte(op2 | encode(dst)); 215 emit_byte(imm32 & 0xFF); 216 } else { 217 emit_byte(op1); 218 emit_byte(op2 | encode(dst)); 219 emit_long(imm32); 220 } 221 } 222 223 // immediate-to-memory forms 224 void Assembler::emit_arith_operand(int op1, Register rm, Address adr, int32_t imm32) { 225 assert((op1 & 0x01) == 1, "should be 32bit operation"); 226 assert((op1 & 0x02) == 0, "sign-extension bit should not be set"); 227 if (is8bit(imm32)) { 228 emit_byte(op1 | 0x02); // set sign bit 229 emit_operand(rm, adr, 1); 230 emit_byte(imm32 & 0xFF); 231 } else { 232 emit_byte(op1); 233 emit_operand(rm, adr, 4); 234 emit_long(imm32); 235 } 236 } 237 238 void Assembler::emit_arith(int op1, int op2, Register dst, jobject obj) { 239 LP64_ONLY(ShouldNotReachHere()); 240 assert(isByte(op1) && isByte(op2), "wrong opcode"); 241 assert((op1 & 0x01) == 1, "should be 32bit operation"); 242 assert((op1 & 0x02) == 0, "sign-extension bit should not be set"); 243 InstructionMark im(this); 244 emit_byte(op1); 245 emit_byte(op2 | encode(dst)); 246 emit_data((intptr_t)obj, relocInfo::oop_type, 0); 247 } 248 249 250 void Assembler::emit_arith(int op1, int op2, Register dst, Register src) { 251 assert(isByte(op1) && isByte(op2), "wrong opcode"); 252 emit_byte(op1); 253 emit_byte(op2 | encode(dst) << 3 | encode(src)); 254 } 255 256 257 void Assembler::emit_operand(Register reg, Register base, Register index, 258 Address::ScaleFactor scale, int disp, 259 RelocationHolder const& rspec, 260 int rip_relative_correction) { 261 relocInfo::relocType rtype = (relocInfo::relocType) rspec.type(); 262 263 // Encode the registers as needed in the fields they are used in 264 265 int regenc = encode(reg) << 3; 266 int indexenc = index->is_valid() ? encode(index) << 3 : 0; 267 int baseenc = base->is_valid() ? encode(base) : 0; 268 269 if (base->is_valid()) { 270 if (index->is_valid()) { 271 assert(scale != Address::no_scale, "inconsistent address"); 272 // [base + index*scale + disp] 273 if (disp == 0 && rtype == relocInfo::none && 274 base != rbp LP64_ONLY(&& base != r13)) { 275 // [base + index*scale] 276 // [00 reg 100][ss index base] 277 assert(index != rsp, "illegal addressing mode"); 278 emit_byte(0x04 | regenc); 279 emit_byte(scale << 6 | indexenc | baseenc); 280 } else if (is8bit(disp) && rtype == relocInfo::none) { 281 // [base + index*scale + imm8] 282 // [01 reg 100][ss index base] imm8 283 assert(index != rsp, "illegal addressing mode"); 284 emit_byte(0x44 | regenc); 285 emit_byte(scale << 6 | indexenc | baseenc); 286 emit_byte(disp & 0xFF); 287 } else { 288 // [base + index*scale + disp32] 289 // [10 reg 100][ss index base] disp32 290 assert(index != rsp, "illegal addressing mode"); 291 emit_byte(0x84 | regenc); 292 emit_byte(scale << 6 | indexenc | baseenc); 293 emit_data(disp, rspec, disp32_operand); 294 } 295 } else if (base == rsp LP64_ONLY(|| base == r12)) { 296 // [rsp + disp] 297 if (disp == 0 && rtype == relocInfo::none) { 298 // [rsp] 299 // [00 reg 100][00 100 100] 300 emit_byte(0x04 | regenc); 301 emit_byte(0x24); 302 } else if (is8bit(disp) && rtype == relocInfo::none) { 303 // [rsp + imm8] 304 // [01 reg 100][00 100 100] disp8 305 emit_byte(0x44 | regenc); 306 emit_byte(0x24); 307 emit_byte(disp & 0xFF); 308 } else { 309 // [rsp + imm32] 310 // [10 reg 100][00 100 100] disp32 311 emit_byte(0x84 | regenc); 312 emit_byte(0x24); 313 emit_data(disp, rspec, disp32_operand); 314 } 315 } else { 316 // [base + disp] 317 assert(base != rsp LP64_ONLY(&& base != r12), "illegal addressing mode"); 318 if (disp == 0 && rtype == relocInfo::none && 319 base != rbp LP64_ONLY(&& base != r13)) { 320 // [base] 321 // [00 reg base] 322 emit_byte(0x00 | regenc | baseenc); 323 } else if (is8bit(disp) && rtype == relocInfo::none) { 324 // [base + disp8] 325 // [01 reg base] disp8 326 emit_byte(0x40 | regenc | baseenc); 327 emit_byte(disp & 0xFF); 328 } else { 329 // [base + disp32] 330 // [10 reg base] disp32 331 emit_byte(0x80 | regenc | baseenc); 332 emit_data(disp, rspec, disp32_operand); 333 } 334 } 335 } else { 336 if (index->is_valid()) { 337 assert(scale != Address::no_scale, "inconsistent address"); 338 // [index*scale + disp] 339 // [00 reg 100][ss index 101] disp32 340 assert(index != rsp, "illegal addressing mode"); 341 emit_byte(0x04 | regenc); 342 emit_byte(scale << 6 | indexenc | 0x05); 343 emit_data(disp, rspec, disp32_operand); 344 } else if (rtype != relocInfo::none ) { 345 // [disp] (64bit) RIP-RELATIVE (32bit) abs 346 // [00 000 101] disp32 347 348 emit_byte(0x05 | regenc); 349 // Note that the RIP-rel. correction applies to the generated 350 // disp field, but _not_ to the target address in the rspec. 351 352 // disp was created by converting the target address minus the pc 353 // at the start of the instruction. That needs more correction here. 354 // intptr_t disp = target - next_ip; 355 assert(inst_mark() != NULL, "must be inside InstructionMark"); 356 address next_ip = pc() + sizeof(int32_t) + rip_relative_correction; 357 int64_t adjusted = disp; 358 // Do rip-rel adjustment for 64bit 359 LP64_ONLY(adjusted -= (next_ip - inst_mark())); 360 assert(is_simm32(adjusted), 361 "must be 32bit offset (RIP relative address)"); 362 emit_data((int32_t) adjusted, rspec, disp32_operand); 363 364 } else { 365 // 32bit never did this, did everything as the rip-rel/disp code above 366 // [disp] ABSOLUTE 367 // [00 reg 100][00 100 101] disp32 368 emit_byte(0x04 | regenc); 369 emit_byte(0x25); 370 emit_data(disp, rspec, disp32_operand); 371 } 372 } 373 } 374 375 void Assembler::emit_operand(XMMRegister reg, Register base, Register index, 376 Address::ScaleFactor scale, int disp, 377 RelocationHolder const& rspec) { 378 emit_operand((Register)reg, base, index, scale, disp, rspec); 379 } 380 381 // Secret local extension to Assembler::WhichOperand: 382 #define end_pc_operand (_WhichOperand_limit) 383 384 address Assembler::locate_operand(address inst, WhichOperand which) { 385 // Decode the given instruction, and return the address of 386 // an embedded 32-bit operand word. 387 388 // If "which" is disp32_operand, selects the displacement portion 389 // of an effective address specifier. 390 // If "which" is imm64_operand, selects the trailing immediate constant. 391 // If "which" is call32_operand, selects the displacement of a call or jump. 392 // Caller is responsible for ensuring that there is such an operand, 393 // and that it is 32/64 bits wide. 394 395 // If "which" is end_pc_operand, find the end of the instruction. 396 397 address ip = inst; 398 bool is_64bit = false; 399 400 debug_only(bool has_disp32 = false); 401 int tail_size = 0; // other random bytes (#32, #16, etc.) at end of insn 402 403 again_after_prefix: 404 switch (0xFF & *ip++) { 405 406 // These convenience macros generate groups of "case" labels for the switch. 407 #define REP4(x) (x)+0: case (x)+1: case (x)+2: case (x)+3 408 #define REP8(x) (x)+0: case (x)+1: case (x)+2: case (x)+3: \ 409 case (x)+4: case (x)+5: case (x)+6: case (x)+7 410 #define REP16(x) REP8((x)+0): \ 411 case REP8((x)+8) 412 413 case CS_segment: 414 case SS_segment: 415 case DS_segment: 416 case ES_segment: 417 case FS_segment: 418 case GS_segment: 419 // Seems dubious 420 LP64_ONLY(assert(false, "shouldn't have that prefix")); 421 assert(ip == inst+1, "only one prefix allowed"); 422 goto again_after_prefix; 423 424 case 0x67: 425 case REX: 426 case REX_B: 427 case REX_X: 428 case REX_XB: 429 case REX_R: 430 case REX_RB: 431 case REX_RX: 432 case REX_RXB: 433 NOT_LP64(assert(false, "64bit prefixes")); 434 goto again_after_prefix; 435 436 case REX_W: 437 case REX_WB: 438 case REX_WX: 439 case REX_WXB: 440 case REX_WR: 441 case REX_WRB: 442 case REX_WRX: 443 case REX_WRXB: 444 NOT_LP64(assert(false, "64bit prefixes")); 445 is_64bit = true; 446 goto again_after_prefix; 447 448 case 0xFF: // pushq a; decl a; incl a; call a; jmp a 449 case 0x88: // movb a, r 450 case 0x89: // movl a, r 451 case 0x8A: // movb r, a 452 case 0x8B: // movl r, a 453 case 0x8F: // popl a 454 debug_only(has_disp32 = true); 455 break; 456 457 case 0x68: // pushq #32 458 if (which == end_pc_operand) { 459 return ip + 4; 460 } 461 assert(which == imm_operand && !is_64bit, "pushl has no disp32 or 64bit immediate"); 462 return ip; // not produced by emit_operand 463 464 case 0x66: // movw ... (size prefix) 465 again_after_size_prefix2: 466 switch (0xFF & *ip++) { 467 case REX: 468 case REX_B: 469 case REX_X: 470 case REX_XB: 471 case REX_R: 472 case REX_RB: 473 case REX_RX: 474 case REX_RXB: 475 case REX_W: 476 case REX_WB: 477 case REX_WX: 478 case REX_WXB: 479 case REX_WR: 480 case REX_WRB: 481 case REX_WRX: 482 case REX_WRXB: 483 NOT_LP64(assert(false, "64bit prefix found")); 484 goto again_after_size_prefix2; 485 case 0x8B: // movw r, a 486 case 0x89: // movw a, r 487 debug_only(has_disp32 = true); 488 break; 489 case 0xC7: // movw a, #16 490 debug_only(has_disp32 = true); 491 tail_size = 2; // the imm16 492 break; 493 case 0x0F: // several SSE/SSE2 variants 494 ip--; // reparse the 0x0F 495 goto again_after_prefix; 496 default: 497 ShouldNotReachHere(); 498 } 499 break; 500 501 case REP8(0xB8): // movl/q r, #32/#64(oop?) 502 if (which == end_pc_operand) return ip + (is_64bit ? 8 : 4); 503 // these asserts are somewhat nonsensical 504 #ifndef _LP64 505 assert(which == imm_operand || which == disp32_operand, ""); 506 #else 507 assert((which == call32_operand || which == imm_operand) && is_64bit || 508 which == narrow_oop_operand && !is_64bit, ""); 509 #endif // _LP64 510 return ip; 511 512 case 0x69: // imul r, a, #32 513 case 0xC7: // movl a, #32(oop?) 514 tail_size = 4; 515 debug_only(has_disp32 = true); // has both kinds of operands! 516 break; 517 518 case 0x0F: // movx..., etc. 519 switch (0xFF & *ip++) { 520 case 0x12: // movlps 521 case 0x28: // movaps 522 case 0x2E: // ucomiss 523 case 0x2F: // comiss 524 case 0x54: // andps 525 case 0x55: // andnps 526 case 0x56: // orps 527 case 0x57: // xorps 528 case 0x6E: // movd 529 case 0x7E: // movd 530 case 0xAE: // ldmxcsr a 531 // 64bit side says it these have both operands but that doesn't 532 // appear to be true 533 debug_only(has_disp32 = true); 534 break; 535 536 case 0xAD: // shrd r, a, %cl 537 case 0xAF: // imul r, a 538 case 0xBE: // movsbl r, a (movsxb) 539 case 0xBF: // movswl r, a (movsxw) 540 case 0xB6: // movzbl r, a (movzxb) 541 case 0xB7: // movzwl r, a (movzxw) 542 case REP16(0x40): // cmovl cc, r, a 543 case 0xB0: // cmpxchgb 544 case 0xB1: // cmpxchg 545 case 0xC1: // xaddl 546 case 0xC7: // cmpxchg8 547 case REP16(0x90): // setcc a 548 debug_only(has_disp32 = true); 549 // fall out of the switch to decode the address 550 break; 551 552 case 0xAC: // shrd r, a, #8 553 debug_only(has_disp32 = true); 554 tail_size = 1; // the imm8 555 break; 556 557 case REP16(0x80): // jcc rdisp32 558 if (which == end_pc_operand) return ip + 4; 559 assert(which == call32_operand, "jcc has no disp32 or imm"); 560 return ip; 561 default: 562 ShouldNotReachHere(); 563 } 564 break; 565 566 case 0x81: // addl a, #32; addl r, #32 567 // also: orl, adcl, sbbl, andl, subl, xorl, cmpl 568 // on 32bit in the case of cmpl, the imm might be an oop 569 tail_size = 4; 570 debug_only(has_disp32 = true); // has both kinds of operands! 571 break; 572 573 case 0x83: // addl a, #8; addl r, #8 574 // also: orl, adcl, sbbl, andl, subl, xorl, cmpl 575 debug_only(has_disp32 = true); // has both kinds of operands! 576 tail_size = 1; 577 break; 578 579 case 0x9B: 580 switch (0xFF & *ip++) { 581 case 0xD9: // fnstcw a 582 debug_only(has_disp32 = true); 583 break; 584 default: 585 ShouldNotReachHere(); 586 } 587 break; 588 589 case REP4(0x00): // addb a, r; addl a, r; addb r, a; addl r, a 590 case REP4(0x10): // adc... 591 case REP4(0x20): // and... 592 case REP4(0x30): // xor... 593 case REP4(0x08): // or... 594 case REP4(0x18): // sbb... 595 case REP4(0x28): // sub... 596 case 0xF7: // mull a 597 case 0x8D: // lea r, a 598 case 0x87: // xchg r, a 599 case REP4(0x38): // cmp... 600 case 0x85: // test r, a 601 debug_only(has_disp32 = true); // has both kinds of operands! 602 break; 603 604 case 0xC1: // sal a, #8; sar a, #8; shl a, #8; shr a, #8 605 case 0xC6: // movb a, #8 606 case 0x80: // cmpb a, #8 607 case 0x6B: // imul r, a, #8 608 debug_only(has_disp32 = true); // has both kinds of operands! 609 tail_size = 1; // the imm8 610 break; 611 612 case 0xE8: // call rdisp32 613 case 0xE9: // jmp rdisp32 614 if (which == end_pc_operand) return ip + 4; 615 assert(which == call32_operand, "call has no disp32 or imm"); 616 return ip; 617 618 case 0xD1: // sal a, 1; sar a, 1; shl a, 1; shr a, 1 619 case 0xD3: // sal a, %cl; sar a, %cl; shl a, %cl; shr a, %cl 620 case 0xD9: // fld_s a; fst_s a; fstp_s a; fldcw a 621 case 0xDD: // fld_d a; fst_d a; fstp_d a 622 case 0xDB: // fild_s a; fistp_s a; fld_x a; fstp_x a 623 case 0xDF: // fild_d a; fistp_d a 624 case 0xD8: // fadd_s a; fsubr_s a; fmul_s a; fdivr_s a; fcomp_s a 625 case 0xDC: // fadd_d a; fsubr_d a; fmul_d a; fdivr_d a; fcomp_d a 626 case 0xDE: // faddp_d a; fsubrp_d a; fmulp_d a; fdivrp_d a; fcompp_d a 627 debug_only(has_disp32 = true); 628 break; 629 630 case 0xF0: // Lock 631 assert(os::is_MP(), "only on MP"); 632 goto again_after_prefix; 633 634 case 0xF3: // For SSE 635 case 0xF2: // For SSE2 636 switch (0xFF & *ip++) { 637 case REX: 638 case REX_B: 639 case REX_X: 640 case REX_XB: 641 case REX_R: 642 case REX_RB: 643 case REX_RX: 644 case REX_RXB: 645 case REX_W: 646 case REX_WB: 647 case REX_WX: 648 case REX_WXB: 649 case REX_WR: 650 case REX_WRB: 651 case REX_WRX: 652 case REX_WRXB: 653 NOT_LP64(assert(false, "found 64bit prefix")); 654 ip++; 655 default: 656 ip++; 657 } 658 debug_only(has_disp32 = true); // has both kinds of operands! 659 break; 660 661 default: 662 ShouldNotReachHere(); 663 664 #undef REP8 665 #undef REP16 666 } 667 668 assert(which != call32_operand, "instruction is not a call, jmp, or jcc"); 669 #ifdef _LP64 670 assert(which != imm_operand, "instruction is not a movq reg, imm64"); 671 #else 672 // assert(which != imm_operand || has_imm32, "instruction has no imm32 field"); 673 assert(which != imm_operand || has_disp32, "instruction has no imm32 field"); 674 #endif // LP64 675 assert(which != disp32_operand || has_disp32, "instruction has no disp32 field"); 676 677 // parse the output of emit_operand 678 int op2 = 0xFF & *ip++; 679 int base = op2 & 0x07; 680 int op3 = -1; 681 const int b100 = 4; 682 const int b101 = 5; 683 if (base == b100 && (op2 >> 6) != 3) { 684 op3 = 0xFF & *ip++; 685 base = op3 & 0x07; // refetch the base 686 } 687 // now ip points at the disp (if any) 688 689 switch (op2 >> 6) { 690 case 0: 691 // [00 reg 100][ss index base] 692 // [00 reg 100][00 100 esp] 693 // [00 reg base] 694 // [00 reg 100][ss index 101][disp32] 695 // [00 reg 101] [disp32] 696 697 if (base == b101) { 698 if (which == disp32_operand) 699 return ip; // caller wants the disp32 700 ip += 4; // skip the disp32 701 } 702 break; 703 704 case 1: 705 // [01 reg 100][ss index base][disp8] 706 // [01 reg 100][00 100 esp][disp8] 707 // [01 reg base] [disp8] 708 ip += 1; // skip the disp8 709 break; 710 711 case 2: 712 // [10 reg 100][ss index base][disp32] 713 // [10 reg 100][00 100 esp][disp32] 714 // [10 reg base] [disp32] 715 if (which == disp32_operand) 716 return ip; // caller wants the disp32 717 ip += 4; // skip the disp32 718 break; 719 720 case 3: 721 // [11 reg base] (not a memory addressing mode) 722 break; 723 } 724 725 if (which == end_pc_operand) { 726 return ip + tail_size; 727 } 728 729 #ifdef _LP64 730 assert(which == narrow_oop_operand && !is_64bit, "instruction is not a movl adr, imm32"); 731 #else 732 assert(which == imm_operand, "instruction has only an imm field"); 733 #endif // LP64 734 return ip; 735 } 736 737 address Assembler::locate_next_instruction(address inst) { 738 // Secretly share code with locate_operand: 739 return locate_operand(inst, end_pc_operand); 740 } 741 742 743 #ifdef ASSERT 744 void Assembler::check_relocation(RelocationHolder const& rspec, int format) { 745 address inst = inst_mark(); 746 assert(inst != NULL && inst < pc(), "must point to beginning of instruction"); 747 address opnd; 748 749 Relocation* r = rspec.reloc(); 750 if (r->type() == relocInfo::none) { 751 return; 752 } else if (r->is_call() || format == call32_operand) { 753 // assert(format == imm32_operand, "cannot specify a nonzero format"); 754 opnd = locate_operand(inst, call32_operand); 755 } else if (r->is_data()) { 756 assert(format == imm_operand || format == disp32_operand 757 LP64_ONLY(|| format == narrow_oop_operand), "format ok"); 758 opnd = locate_operand(inst, (WhichOperand)format); 759 } else { 760 assert(format == imm_operand, "cannot specify a format"); 761 return; 762 } 763 assert(opnd == pc(), "must put operand where relocs can find it"); 764 } 765 #endif // ASSERT 766 767 void Assembler::emit_operand32(Register reg, Address adr) { 768 assert(reg->encoding() < 8, "no extended registers"); 769 assert(!adr.base_needs_rex() && !adr.index_needs_rex(), "no extended registers"); 770 emit_operand(reg, adr._base, adr._index, adr._scale, adr._disp, 771 adr._rspec); 772 } 773 774 void Assembler::emit_operand(Register reg, Address adr, 775 int rip_relative_correction) { 776 emit_operand(reg, adr._base, adr._index, adr._scale, adr._disp, 777 adr._rspec, 778 rip_relative_correction); 779 } 780 781 void Assembler::emit_operand(XMMRegister reg, Address adr) { 782 emit_operand(reg, adr._base, adr._index, adr._scale, adr._disp, 783 adr._rspec); 784 } 785 786 // MMX operations 787 void Assembler::emit_operand(MMXRegister reg, Address adr) { 788 assert(!adr.base_needs_rex() && !adr.index_needs_rex(), "no extended registers"); 789 emit_operand((Register)reg, adr._base, adr._index, adr._scale, adr._disp, adr._rspec); 790 } 791 792 // work around gcc (3.2.1-7a) bug 793 void Assembler::emit_operand(Address adr, MMXRegister reg) { 794 assert(!adr.base_needs_rex() && !adr.index_needs_rex(), "no extended registers"); 795 emit_operand((Register)reg, adr._base, adr._index, adr._scale, adr._disp, adr._rspec); 796 } 797 798 799 void Assembler::emit_farith(int b1, int b2, int i) { 800 assert(isByte(b1) && isByte(b2), "wrong opcode"); 801 assert(0 <= i && i < 8, "illegal stack offset"); 802 emit_byte(b1); 803 emit_byte(b2 + i); 804 } 805 806 807 // Now the Assembler instruction (identical for 32/64 bits) 808 809 void Assembler::adcl(Register dst, int32_t imm32) { 810 prefix(dst); 811 emit_arith(0x81, 0xD0, dst, imm32); 812 } 813 814 void Assembler::adcl(Register dst, Address src) { 815 InstructionMark im(this); 816 prefix(src, dst); 817 emit_byte(0x13); 818 emit_operand(dst, src); 819 } 820 821 void Assembler::adcl(Register dst, Register src) { 822 (void) prefix_and_encode(dst->encoding(), src->encoding()); 823 emit_arith(0x13, 0xC0, dst, src); 824 } 825 826 void Assembler::addl(Address dst, int32_t imm32) { 827 InstructionMark im(this); 828 prefix(dst); 829 emit_arith_operand(0x81, rax, dst, imm32); 830 } 831 832 void Assembler::addl(Address dst, Register src) { 833 InstructionMark im(this); 834 prefix(dst, src); 835 emit_byte(0x01); 836 emit_operand(src, dst); 837 } 838 839 void Assembler::addl(Register dst, int32_t imm32) { 840 prefix(dst); 841 emit_arith(0x81, 0xC0, dst, imm32); 842 } 843 844 void Assembler::addl(Register dst, Address src) { 845 InstructionMark im(this); 846 prefix(src, dst); 847 emit_byte(0x03); 848 emit_operand(dst, src); 849 } 850 851 void Assembler::addl(Register dst, Register src) { 852 (void) prefix_and_encode(dst->encoding(), src->encoding()); 853 emit_arith(0x03, 0xC0, dst, src); 854 } 855 856 void Assembler::addr_nop_4() { 857 // 4 bytes: NOP DWORD PTR [EAX+0] 858 emit_byte(0x0F); 859 emit_byte(0x1F); 860 emit_byte(0x40); // emit_rm(cbuf, 0x1, EAX_enc, EAX_enc); 861 emit_byte(0); // 8-bits offset (1 byte) 862 } 863 864 void Assembler::addr_nop_5() { 865 // 5 bytes: NOP DWORD PTR [EAX+EAX*0+0] 8-bits offset 866 emit_byte(0x0F); 867 emit_byte(0x1F); 868 emit_byte(0x44); // emit_rm(cbuf, 0x1, EAX_enc, 0x4); 869 emit_byte(0x00); // emit_rm(cbuf, 0x0, EAX_enc, EAX_enc); 870 emit_byte(0); // 8-bits offset (1 byte) 871 } 872 873 void Assembler::addr_nop_7() { 874 // 7 bytes: NOP DWORD PTR [EAX+0] 32-bits offset 875 emit_byte(0x0F); 876 emit_byte(0x1F); 877 emit_byte(0x80); // emit_rm(cbuf, 0x2, EAX_enc, EAX_enc); 878 emit_long(0); // 32-bits offset (4 bytes) 879 } 880 881 void Assembler::addr_nop_8() { 882 // 8 bytes: NOP DWORD PTR [EAX+EAX*0+0] 32-bits offset 883 emit_byte(0x0F); 884 emit_byte(0x1F); 885 emit_byte(0x84); // emit_rm(cbuf, 0x2, EAX_enc, 0x4); 886 emit_byte(0x00); // emit_rm(cbuf, 0x0, EAX_enc, EAX_enc); 887 emit_long(0); // 32-bits offset (4 bytes) 888 } 889 890 void Assembler::addsd(XMMRegister dst, XMMRegister src) { 891 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 892 emit_byte(0xF2); 893 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 894 emit_byte(0x0F); 895 emit_byte(0x58); 896 emit_byte(0xC0 | encode); 897 } 898 899 void Assembler::addsd(XMMRegister dst, Address src) { 900 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 901 InstructionMark im(this); 902 emit_byte(0xF2); 903 prefix(src, dst); 904 emit_byte(0x0F); 905 emit_byte(0x58); 906 emit_operand(dst, src); 907 } 908 909 void Assembler::addss(XMMRegister dst, XMMRegister src) { 910 NOT_LP64(assert(VM_Version::supports_sse(), "")); 911 emit_byte(0xF3); 912 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 913 emit_byte(0x0F); 914 emit_byte(0x58); 915 emit_byte(0xC0 | encode); 916 } 917 918 void Assembler::addss(XMMRegister dst, Address src) { 919 NOT_LP64(assert(VM_Version::supports_sse(), "")); 920 InstructionMark im(this); 921 emit_byte(0xF3); 922 prefix(src, dst); 923 emit_byte(0x0F); 924 emit_byte(0x58); 925 emit_operand(dst, src); 926 } 927 928 void Assembler::andl(Register dst, int32_t imm32) { 929 prefix(dst); 930 emit_arith(0x81, 0xE0, dst, imm32); 931 } 932 933 void Assembler::andl(Register dst, Address src) { 934 InstructionMark im(this); 935 prefix(src, dst); 936 emit_byte(0x23); 937 emit_operand(dst, src); 938 } 939 940 void Assembler::andl(Register dst, Register src) { 941 (void) prefix_and_encode(dst->encoding(), src->encoding()); 942 emit_arith(0x23, 0xC0, dst, src); 943 } 944 945 void Assembler::andpd(XMMRegister dst, Address src) { 946 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 947 InstructionMark im(this); 948 emit_byte(0x66); 949 prefix(src, dst); 950 emit_byte(0x0F); 951 emit_byte(0x54); 952 emit_operand(dst, src); 953 } 954 955 void Assembler::bsfl(Register dst, Register src) { 956 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 957 emit_byte(0x0F); 958 emit_byte(0xBC); 959 emit_byte(0xC0 | encode); 960 } 961 962 void Assembler::bsrl(Register dst, Register src) { 963 assert(!VM_Version::supports_lzcnt(), "encoding is treated as LZCNT"); 964 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 965 emit_byte(0x0F); 966 emit_byte(0xBD); 967 emit_byte(0xC0 | encode); 968 } 969 970 void Assembler::bswapl(Register reg) { // bswap 971 int encode = prefix_and_encode(reg->encoding()); 972 emit_byte(0x0F); 973 emit_byte(0xC8 | encode); 974 } 975 976 void Assembler::call(Label& L, relocInfo::relocType rtype) { 977 // suspect disp32 is always good 978 int operand = LP64_ONLY(disp32_operand) NOT_LP64(imm_operand); 979 980 if (L.is_bound()) { 981 const int long_size = 5; 982 int offs = (int)( target(L) - pc() ); 983 assert(offs <= 0, "assembler error"); 984 InstructionMark im(this); 985 // 1110 1000 #32-bit disp 986 emit_byte(0xE8); 987 emit_data(offs - long_size, rtype, operand); 988 } else { 989 InstructionMark im(this); 990 // 1110 1000 #32-bit disp 991 L.add_patch_at(code(), locator()); 992 993 emit_byte(0xE8); 994 emit_data(int(0), rtype, operand); 995 } 996 } 997 998 void Assembler::call(Register dst) { 999 // This was originally using a 32bit register encoding 1000 // and surely we want 64bit! 1001 // this is a 32bit encoding but in 64bit mode the default 1002 // operand size is 64bit so there is no need for the 1003 // wide prefix. So prefix only happens if we use the 1004 // new registers. Much like push/pop. 1005 int x = offset(); 1006 // this may be true but dbx disassembles it as if it 1007 // were 32bits... 1008 // int encode = prefix_and_encode(dst->encoding()); 1009 // if (offset() != x) assert(dst->encoding() >= 8, "what?"); 1010 int encode = prefixq_and_encode(dst->encoding()); 1011 1012 emit_byte(0xFF); 1013 emit_byte(0xD0 | encode); 1014 } 1015 1016 1017 void Assembler::call(Address adr) { 1018 InstructionMark im(this); 1019 prefix(adr); 1020 emit_byte(0xFF); 1021 emit_operand(rdx, adr); 1022 } 1023 1024 void Assembler::call_literal(address entry, RelocationHolder const& rspec) { 1025 assert(entry != NULL, "call most probably wrong"); 1026 InstructionMark im(this); 1027 emit_byte(0xE8); 1028 intptr_t disp = entry - (_code_pos + sizeof(int32_t)); 1029 assert(is_simm32(disp), "must be 32bit offset (call2)"); 1030 // Technically, should use call32_operand, but this format is 1031 // implied by the fact that we're emitting a call instruction. 1032 1033 int operand = LP64_ONLY(disp32_operand) NOT_LP64(call32_operand); 1034 emit_data((int) disp, rspec, operand); 1035 } 1036 1037 void Assembler::cdql() { 1038 emit_byte(0x99); 1039 } 1040 1041 void Assembler::cmovl(Condition cc, Register dst, Register src) { 1042 NOT_LP64(guarantee(VM_Version::supports_cmov(), "illegal instruction")); 1043 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1044 emit_byte(0x0F); 1045 emit_byte(0x40 | cc); 1046 emit_byte(0xC0 | encode); 1047 } 1048 1049 1050 void Assembler::cmovl(Condition cc, Register dst, Address src) { 1051 NOT_LP64(guarantee(VM_Version::supports_cmov(), "illegal instruction")); 1052 prefix(src, dst); 1053 emit_byte(0x0F); 1054 emit_byte(0x40 | cc); 1055 emit_operand(dst, src); 1056 } 1057 1058 void Assembler::cmpb(Address dst, int imm8) { 1059 InstructionMark im(this); 1060 prefix(dst); 1061 emit_byte(0x80); 1062 emit_operand(rdi, dst, 1); 1063 emit_byte(imm8); 1064 } 1065 1066 void Assembler::cmpl(Address dst, int32_t imm32) { 1067 InstructionMark im(this); 1068 prefix(dst); 1069 emit_byte(0x81); 1070 emit_operand(rdi, dst, 4); 1071 emit_long(imm32); 1072 } 1073 1074 void Assembler::cmpl(Register dst, int32_t imm32) { 1075 prefix(dst); 1076 emit_arith(0x81, 0xF8, dst, imm32); 1077 } 1078 1079 void Assembler::cmpl(Register dst, Register src) { 1080 (void) prefix_and_encode(dst->encoding(), src->encoding()); 1081 emit_arith(0x3B, 0xC0, dst, src); 1082 } 1083 1084 1085 void Assembler::cmpl(Register dst, Address src) { 1086 InstructionMark im(this); 1087 prefix(src, dst); 1088 emit_byte(0x3B); 1089 emit_operand(dst, src); 1090 } 1091 1092 void Assembler::cmpw(Address dst, int imm16) { 1093 InstructionMark im(this); 1094 assert(!dst.base_needs_rex() && !dst.index_needs_rex(), "no extended registers"); 1095 emit_byte(0x66); 1096 emit_byte(0x81); 1097 emit_operand(rdi, dst, 2); 1098 emit_word(imm16); 1099 } 1100 1101 // The 32-bit cmpxchg compares the value at adr with the contents of rax, 1102 // and stores reg into adr if so; otherwise, the value at adr is loaded into rax,. 1103 // The ZF is set if the compared values were equal, and cleared otherwise. 1104 void Assembler::cmpxchgl(Register reg, Address adr) { // cmpxchg 1105 if (Atomics & 2) { 1106 // caveat: no instructionmark, so this isn't relocatable. 1107 // Emit a synthetic, non-atomic, CAS equivalent. 1108 // Beware. The synthetic form sets all ICCs, not just ZF. 1109 // cmpxchg r,[m] is equivalent to rax, = CAS (m, rax, r) 1110 cmpl(rax, adr); 1111 movl(rax, adr); 1112 if (reg != rax) { 1113 Label L ; 1114 jcc(Assembler::notEqual, L); 1115 movl(adr, reg); 1116 bind(L); 1117 } 1118 } else { 1119 InstructionMark im(this); 1120 prefix(adr, reg); 1121 emit_byte(0x0F); 1122 emit_byte(0xB1); 1123 emit_operand(reg, adr); 1124 } 1125 } 1126 1127 void Assembler::comisd(XMMRegister dst, Address src) { 1128 // NOTE: dbx seems to decode this as comiss even though the 1129 // 0x66 is there. Strangly ucomisd comes out correct 1130 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1131 emit_byte(0x66); 1132 comiss(dst, src); 1133 } 1134 1135 void Assembler::comiss(XMMRegister dst, Address src) { 1136 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1137 1138 InstructionMark im(this); 1139 prefix(src, dst); 1140 emit_byte(0x0F); 1141 emit_byte(0x2F); 1142 emit_operand(dst, src); 1143 } 1144 1145 void Assembler::cvtdq2pd(XMMRegister dst, XMMRegister src) { 1146 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1147 emit_byte(0xF3); 1148 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1149 emit_byte(0x0F); 1150 emit_byte(0xE6); 1151 emit_byte(0xC0 | encode); 1152 } 1153 1154 void Assembler::cvtdq2ps(XMMRegister dst, XMMRegister src) { 1155 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1156 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1157 emit_byte(0x0F); 1158 emit_byte(0x5B); 1159 emit_byte(0xC0 | encode); 1160 } 1161 1162 void Assembler::cvtsd2ss(XMMRegister dst, XMMRegister src) { 1163 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1164 emit_byte(0xF2); 1165 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1166 emit_byte(0x0F); 1167 emit_byte(0x5A); 1168 emit_byte(0xC0 | encode); 1169 } 1170 1171 void Assembler::cvtsi2sdl(XMMRegister dst, Register src) { 1172 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1173 emit_byte(0xF2); 1174 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1175 emit_byte(0x0F); 1176 emit_byte(0x2A); 1177 emit_byte(0xC0 | encode); 1178 } 1179 1180 void Assembler::cvtsi2ssl(XMMRegister dst, Register src) { 1181 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1182 emit_byte(0xF3); 1183 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1184 emit_byte(0x0F); 1185 emit_byte(0x2A); 1186 emit_byte(0xC0 | encode); 1187 } 1188 1189 void Assembler::cvtss2sd(XMMRegister dst, XMMRegister src) { 1190 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1191 emit_byte(0xF3); 1192 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1193 emit_byte(0x0F); 1194 emit_byte(0x5A); 1195 emit_byte(0xC0 | encode); 1196 } 1197 1198 void Assembler::cvttsd2sil(Register dst, XMMRegister src) { 1199 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1200 emit_byte(0xF2); 1201 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1202 emit_byte(0x0F); 1203 emit_byte(0x2C); 1204 emit_byte(0xC0 | encode); 1205 } 1206 1207 void Assembler::cvttss2sil(Register dst, XMMRegister src) { 1208 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1209 emit_byte(0xF3); 1210 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1211 emit_byte(0x0F); 1212 emit_byte(0x2C); 1213 emit_byte(0xC0 | encode); 1214 } 1215 1216 void Assembler::decl(Address dst) { 1217 // Don't use it directly. Use MacroAssembler::decrement() instead. 1218 InstructionMark im(this); 1219 prefix(dst); 1220 emit_byte(0xFF); 1221 emit_operand(rcx, dst); 1222 } 1223 1224 void Assembler::divsd(XMMRegister dst, Address src) { 1225 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1226 InstructionMark im(this); 1227 emit_byte(0xF2); 1228 prefix(src, dst); 1229 emit_byte(0x0F); 1230 emit_byte(0x5E); 1231 emit_operand(dst, src); 1232 } 1233 1234 void Assembler::divsd(XMMRegister dst, XMMRegister src) { 1235 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1236 emit_byte(0xF2); 1237 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1238 emit_byte(0x0F); 1239 emit_byte(0x5E); 1240 emit_byte(0xC0 | encode); 1241 } 1242 1243 void Assembler::divss(XMMRegister dst, Address src) { 1244 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1245 InstructionMark im(this); 1246 emit_byte(0xF3); 1247 prefix(src, dst); 1248 emit_byte(0x0F); 1249 emit_byte(0x5E); 1250 emit_operand(dst, src); 1251 } 1252 1253 void Assembler::divss(XMMRegister dst, XMMRegister src) { 1254 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1255 emit_byte(0xF3); 1256 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1257 emit_byte(0x0F); 1258 emit_byte(0x5E); 1259 emit_byte(0xC0 | encode); 1260 } 1261 1262 void Assembler::emms() { 1263 NOT_LP64(assert(VM_Version::supports_mmx(), "")); 1264 emit_byte(0x0F); 1265 emit_byte(0x77); 1266 } 1267 1268 void Assembler::hlt() { 1269 emit_byte(0xF4); 1270 } 1271 1272 void Assembler::idivl(Register src) { 1273 int encode = prefix_and_encode(src->encoding()); 1274 emit_byte(0xF7); 1275 emit_byte(0xF8 | encode); 1276 } 1277 1278 void Assembler::imull(Register dst, Register src) { 1279 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1280 emit_byte(0x0F); 1281 emit_byte(0xAF); 1282 emit_byte(0xC0 | encode); 1283 } 1284 1285 1286 void Assembler::imull(Register dst, Register src, int value) { 1287 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1288 if (is8bit(value)) { 1289 emit_byte(0x6B); 1290 emit_byte(0xC0 | encode); 1291 emit_byte(value); 1292 } else { 1293 emit_byte(0x69); 1294 emit_byte(0xC0 | encode); 1295 emit_long(value); 1296 } 1297 } 1298 1299 void Assembler::incl(Address dst) { 1300 // Don't use it directly. Use MacroAssembler::increment() instead. 1301 InstructionMark im(this); 1302 prefix(dst); 1303 emit_byte(0xFF); 1304 emit_operand(rax, dst); 1305 } 1306 1307 void Assembler::jcc(Condition cc, Label& L, relocInfo::relocType rtype) { 1308 InstructionMark im(this); 1309 relocate(rtype); 1310 assert((0 <= cc) && (cc < 16), "illegal cc"); 1311 if (L.is_bound()) { 1312 address dst = target(L); 1313 assert(dst != NULL, "jcc most probably wrong"); 1314 1315 const int short_size = 2; 1316 const int long_size = 6; 1317 intptr_t offs = (intptr_t)dst - (intptr_t)_code_pos; 1318 if (rtype == relocInfo::none && is8bit(offs - short_size)) { 1319 // 0111 tttn #8-bit disp 1320 emit_byte(0x70 | cc); 1321 emit_byte((offs - short_size) & 0xFF); 1322 } else { 1323 // 0000 1111 1000 tttn #32-bit disp 1324 assert(is_simm32(offs - long_size), 1325 "must be 32bit offset (call4)"); 1326 emit_byte(0x0F); 1327 emit_byte(0x80 | cc); 1328 emit_long(offs - long_size); 1329 } 1330 } else { 1331 // Note: could eliminate cond. jumps to this jump if condition 1332 // is the same however, seems to be rather unlikely case. 1333 // Note: use jccb() if label to be bound is very close to get 1334 // an 8-bit displacement 1335 L.add_patch_at(code(), locator()); 1336 emit_byte(0x0F); 1337 emit_byte(0x80 | cc); 1338 emit_long(0); 1339 } 1340 } 1341 1342 void Assembler::jccb(Condition cc, Label& L) { 1343 if (L.is_bound()) { 1344 const int short_size = 2; 1345 address entry = target(L); 1346 assert(is8bit((intptr_t)entry - ((intptr_t)_code_pos + short_size)), 1347 "Dispacement too large for a short jmp"); 1348 intptr_t offs = (intptr_t)entry - (intptr_t)_code_pos; 1349 // 0111 tttn #8-bit disp 1350 emit_byte(0x70 | cc); 1351 emit_byte((offs - short_size) & 0xFF); 1352 } else { 1353 InstructionMark im(this); 1354 L.add_patch_at(code(), locator()); 1355 emit_byte(0x70 | cc); 1356 emit_byte(0); 1357 } 1358 } 1359 1360 void Assembler::jmp(Address adr) { 1361 InstructionMark im(this); 1362 prefix(adr); 1363 emit_byte(0xFF); 1364 emit_operand(rsp, adr); 1365 } 1366 1367 void Assembler::jmp(Label& L, relocInfo::relocType rtype) { 1368 if (L.is_bound()) { 1369 address entry = target(L); 1370 assert(entry != NULL, "jmp most probably wrong"); 1371 InstructionMark im(this); 1372 const int short_size = 2; 1373 const int long_size = 5; 1374 intptr_t offs = entry - _code_pos; 1375 if (rtype == relocInfo::none && is8bit(offs - short_size)) { 1376 emit_byte(0xEB); 1377 emit_byte((offs - short_size) & 0xFF); 1378 } else { 1379 emit_byte(0xE9); 1380 emit_long(offs - long_size); 1381 } 1382 } else { 1383 // By default, forward jumps are always 32-bit displacements, since 1384 // we can't yet know where the label will be bound. If you're sure that 1385 // the forward jump will not run beyond 256 bytes, use jmpb to 1386 // force an 8-bit displacement. 1387 InstructionMark im(this); 1388 relocate(rtype); 1389 L.add_patch_at(code(), locator()); 1390 emit_byte(0xE9); 1391 emit_long(0); 1392 } 1393 } 1394 1395 void Assembler::jmp(Register entry) { 1396 int encode = prefix_and_encode(entry->encoding()); 1397 emit_byte(0xFF); 1398 emit_byte(0xE0 | encode); 1399 } 1400 1401 void Assembler::jmp_literal(address dest, RelocationHolder const& rspec) { 1402 InstructionMark im(this); 1403 emit_byte(0xE9); 1404 assert(dest != NULL, "must have a target"); 1405 intptr_t disp = dest - (_code_pos + sizeof(int32_t)); 1406 assert(is_simm32(disp), "must be 32bit offset (jmp)"); 1407 emit_data(disp, rspec.reloc(), call32_operand); 1408 } 1409 1410 void Assembler::jmpb(Label& L) { 1411 if (L.is_bound()) { 1412 const int short_size = 2; 1413 address entry = target(L); 1414 assert(is8bit((entry - _code_pos) + short_size), 1415 "Dispacement too large for a short jmp"); 1416 assert(entry != NULL, "jmp most probably wrong"); 1417 intptr_t offs = entry - _code_pos; 1418 emit_byte(0xEB); 1419 emit_byte((offs - short_size) & 0xFF); 1420 } else { 1421 InstructionMark im(this); 1422 L.add_patch_at(code(), locator()); 1423 emit_byte(0xEB); 1424 emit_byte(0); 1425 } 1426 } 1427 1428 void Assembler::ldmxcsr( Address src) { 1429 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1430 InstructionMark im(this); 1431 prefix(src); 1432 emit_byte(0x0F); 1433 emit_byte(0xAE); 1434 emit_operand(as_Register(2), src); 1435 } 1436 1437 void Assembler::leal(Register dst, Address src) { 1438 InstructionMark im(this); 1439 #ifdef _LP64 1440 emit_byte(0x67); // addr32 1441 prefix(src, dst); 1442 #endif // LP64 1443 emit_byte(0x8D); 1444 emit_operand(dst, src); 1445 } 1446 1447 void Assembler::lock() { 1448 if (Atomics & 1) { 1449 // Emit either nothing, a NOP, or a NOP: prefix 1450 emit_byte(0x90) ; 1451 } else { 1452 emit_byte(0xF0); 1453 } 1454 } 1455 1456 void Assembler::lzcntl(Register dst, Register src) { 1457 assert(VM_Version::supports_lzcnt(), "encoding is treated as BSR"); 1458 emit_byte(0xF3); 1459 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1460 emit_byte(0x0F); 1461 emit_byte(0xBD); 1462 emit_byte(0xC0 | encode); 1463 } 1464 1465 // Emit mfence instruction 1466 void Assembler::mfence() { 1467 NOT_LP64(assert(VM_Version::supports_sse2(), "unsupported");) 1468 emit_byte( 0x0F ); 1469 emit_byte( 0xAE ); 1470 emit_byte( 0xF0 ); 1471 } 1472 1473 void Assembler::mov(Register dst, Register src) { 1474 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 1475 } 1476 1477 void Assembler::movapd(XMMRegister dst, XMMRegister src) { 1478 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1479 int dstenc = dst->encoding(); 1480 int srcenc = src->encoding(); 1481 emit_byte(0x66); 1482 if (dstenc < 8) { 1483 if (srcenc >= 8) { 1484 prefix(REX_B); 1485 srcenc -= 8; 1486 } 1487 } else { 1488 if (srcenc < 8) { 1489 prefix(REX_R); 1490 } else { 1491 prefix(REX_RB); 1492 srcenc -= 8; 1493 } 1494 dstenc -= 8; 1495 } 1496 emit_byte(0x0F); 1497 emit_byte(0x28); 1498 emit_byte(0xC0 | dstenc << 3 | srcenc); 1499 } 1500 1501 void Assembler::movaps(XMMRegister dst, XMMRegister src) { 1502 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1503 int dstenc = dst->encoding(); 1504 int srcenc = src->encoding(); 1505 if (dstenc < 8) { 1506 if (srcenc >= 8) { 1507 prefix(REX_B); 1508 srcenc -= 8; 1509 } 1510 } else { 1511 if (srcenc < 8) { 1512 prefix(REX_R); 1513 } else { 1514 prefix(REX_RB); 1515 srcenc -= 8; 1516 } 1517 dstenc -= 8; 1518 } 1519 emit_byte(0x0F); 1520 emit_byte(0x28); 1521 emit_byte(0xC0 | dstenc << 3 | srcenc); 1522 } 1523 1524 void Assembler::movb(Register dst, Address src) { 1525 NOT_LP64(assert(dst->has_byte_register(), "must have byte register")); 1526 InstructionMark im(this); 1527 prefix(src, dst, true); 1528 emit_byte(0x8A); 1529 emit_operand(dst, src); 1530 } 1531 1532 1533 void Assembler::movb(Address dst, int imm8) { 1534 InstructionMark im(this); 1535 prefix(dst); 1536 emit_byte(0xC6); 1537 emit_operand(rax, dst, 1); 1538 emit_byte(imm8); 1539 } 1540 1541 1542 void Assembler::movb(Address dst, Register src) { 1543 assert(src->has_byte_register(), "must have byte register"); 1544 InstructionMark im(this); 1545 prefix(dst, src, true); 1546 emit_byte(0x88); 1547 emit_operand(src, dst); 1548 } 1549 1550 void Assembler::movdl(XMMRegister dst, Register src) { 1551 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1552 emit_byte(0x66); 1553 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1554 emit_byte(0x0F); 1555 emit_byte(0x6E); 1556 emit_byte(0xC0 | encode); 1557 } 1558 1559 void Assembler::movdl(Register dst, XMMRegister src) { 1560 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1561 emit_byte(0x66); 1562 // swap src/dst to get correct prefix 1563 int encode = prefix_and_encode(src->encoding(), dst->encoding()); 1564 emit_byte(0x0F); 1565 emit_byte(0x7E); 1566 emit_byte(0xC0 | encode); 1567 } 1568 1569 void Assembler::movdqa(XMMRegister dst, Address src) { 1570 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1571 InstructionMark im(this); 1572 emit_byte(0x66); 1573 prefix(src, dst); 1574 emit_byte(0x0F); 1575 emit_byte(0x6F); 1576 emit_operand(dst, src); 1577 } 1578 1579 void Assembler::movdqa(XMMRegister dst, XMMRegister src) { 1580 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1581 emit_byte(0x66); 1582 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 1583 emit_byte(0x0F); 1584 emit_byte(0x6F); 1585 emit_byte(0xC0 | encode); 1586 } 1587 1588 void Assembler::movdqa(Address dst, XMMRegister src) { 1589 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1590 InstructionMark im(this); 1591 emit_byte(0x66); 1592 prefix(dst, src); 1593 emit_byte(0x0F); 1594 emit_byte(0x7F); 1595 emit_operand(src, dst); 1596 } 1597 1598 void Assembler::movdqu(XMMRegister dst, Address src) { 1599 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1600 InstructionMark im(this); 1601 emit_byte(0xF3); 1602 prefix(src, dst); 1603 emit_byte(0x0F); 1604 emit_byte(0x6F); 1605 emit_operand(dst, src); 1606 } 1607 1608 void Assembler::movdqu(XMMRegister dst, XMMRegister src) { 1609 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1610 emit_byte(0xF3); 1611 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 1612 emit_byte(0x0F); 1613 emit_byte(0x6F); 1614 emit_byte(0xC0 | encode); 1615 } 1616 1617 void Assembler::movdqu(Address dst, XMMRegister src) { 1618 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1619 InstructionMark im(this); 1620 emit_byte(0xF3); 1621 prefix(dst, src); 1622 emit_byte(0x0F); 1623 emit_byte(0x7F); 1624 emit_operand(src, dst); 1625 } 1626 1627 // Uses zero extension on 64bit 1628 1629 void Assembler::movl(Register dst, int32_t imm32) { 1630 int encode = prefix_and_encode(dst->encoding()); 1631 emit_byte(0xB8 | encode); 1632 emit_long(imm32); 1633 } 1634 1635 void Assembler::movl(Register dst, Register src) { 1636 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1637 emit_byte(0x8B); 1638 emit_byte(0xC0 | encode); 1639 } 1640 1641 void Assembler::movl(Register dst, Address src) { 1642 InstructionMark im(this); 1643 prefix(src, dst); 1644 emit_byte(0x8B); 1645 emit_operand(dst, src); 1646 } 1647 1648 void Assembler::movl(Address dst, int32_t imm32) { 1649 InstructionMark im(this); 1650 prefix(dst); 1651 emit_byte(0xC7); 1652 emit_operand(rax, dst, 4); 1653 emit_long(imm32); 1654 } 1655 1656 void Assembler::movl(Address dst, Register src) { 1657 InstructionMark im(this); 1658 prefix(dst, src); 1659 emit_byte(0x89); 1660 emit_operand(src, dst); 1661 } 1662 1663 // New cpus require to use movsd and movss to avoid partial register stall 1664 // when loading from memory. But for old Opteron use movlpd instead of movsd. 1665 // The selection is done in MacroAssembler::movdbl() and movflt(). 1666 void Assembler::movlpd(XMMRegister dst, Address src) { 1667 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1668 InstructionMark im(this); 1669 emit_byte(0x66); 1670 prefix(src, dst); 1671 emit_byte(0x0F); 1672 emit_byte(0x12); 1673 emit_operand(dst, src); 1674 } 1675 1676 void Assembler::movq( MMXRegister dst, Address src ) { 1677 assert( VM_Version::supports_mmx(), "" ); 1678 emit_byte(0x0F); 1679 emit_byte(0x6F); 1680 emit_operand(dst, src); 1681 } 1682 1683 void Assembler::movq( Address dst, MMXRegister src ) { 1684 assert( VM_Version::supports_mmx(), "" ); 1685 emit_byte(0x0F); 1686 emit_byte(0x7F); 1687 // workaround gcc (3.2.1-7a) bug 1688 // In that version of gcc with only an emit_operand(MMX, Address) 1689 // gcc will tail jump and try and reverse the parameters completely 1690 // obliterating dst in the process. By having a version available 1691 // that doesn't need to swap the args at the tail jump the bug is 1692 // avoided. 1693 emit_operand(dst, src); 1694 } 1695 1696 void Assembler::movq(XMMRegister dst, Address src) { 1697 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1698 InstructionMark im(this); 1699 emit_byte(0xF3); 1700 prefix(src, dst); 1701 emit_byte(0x0F); 1702 emit_byte(0x7E); 1703 emit_operand(dst, src); 1704 } 1705 1706 void Assembler::movq(Address dst, XMMRegister src) { 1707 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1708 InstructionMark im(this); 1709 emit_byte(0x66); 1710 prefix(dst, src); 1711 emit_byte(0x0F); 1712 emit_byte(0xD6); 1713 emit_operand(src, dst); 1714 } 1715 1716 void Assembler::movsbl(Register dst, Address src) { // movsxb 1717 InstructionMark im(this); 1718 prefix(src, dst); 1719 emit_byte(0x0F); 1720 emit_byte(0xBE); 1721 emit_operand(dst, src); 1722 } 1723 1724 void Assembler::movsbl(Register dst, Register src) { // movsxb 1725 NOT_LP64(assert(src->has_byte_register(), "must have byte register")); 1726 int encode = prefix_and_encode(dst->encoding(), src->encoding(), true); 1727 emit_byte(0x0F); 1728 emit_byte(0xBE); 1729 emit_byte(0xC0 | encode); 1730 } 1731 1732 void Assembler::movsd(XMMRegister dst, XMMRegister src) { 1733 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1734 emit_byte(0xF2); 1735 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1736 emit_byte(0x0F); 1737 emit_byte(0x10); 1738 emit_byte(0xC0 | encode); 1739 } 1740 1741 void Assembler::movsd(XMMRegister dst, Address src) { 1742 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1743 InstructionMark im(this); 1744 emit_byte(0xF2); 1745 prefix(src, dst); 1746 emit_byte(0x0F); 1747 emit_byte(0x10); 1748 emit_operand(dst, src); 1749 } 1750 1751 void Assembler::movsd(Address dst, XMMRegister src) { 1752 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1753 InstructionMark im(this); 1754 emit_byte(0xF2); 1755 prefix(dst, src); 1756 emit_byte(0x0F); 1757 emit_byte(0x11); 1758 emit_operand(src, dst); 1759 } 1760 1761 void Assembler::movss(XMMRegister dst, XMMRegister src) { 1762 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1763 emit_byte(0xF3); 1764 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1765 emit_byte(0x0F); 1766 emit_byte(0x10); 1767 emit_byte(0xC0 | encode); 1768 } 1769 1770 void Assembler::movss(XMMRegister dst, Address src) { 1771 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1772 InstructionMark im(this); 1773 emit_byte(0xF3); 1774 prefix(src, dst); 1775 emit_byte(0x0F); 1776 emit_byte(0x10); 1777 emit_operand(dst, src); 1778 } 1779 1780 void Assembler::movss(Address dst, XMMRegister src) { 1781 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1782 InstructionMark im(this); 1783 emit_byte(0xF3); 1784 prefix(dst, src); 1785 emit_byte(0x0F); 1786 emit_byte(0x11); 1787 emit_operand(src, dst); 1788 } 1789 1790 void Assembler::movswl(Register dst, Address src) { // movsxw 1791 InstructionMark im(this); 1792 prefix(src, dst); 1793 emit_byte(0x0F); 1794 emit_byte(0xBF); 1795 emit_operand(dst, src); 1796 } 1797 1798 void Assembler::movswl(Register dst, Register src) { // movsxw 1799 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1800 emit_byte(0x0F); 1801 emit_byte(0xBF); 1802 emit_byte(0xC0 | encode); 1803 } 1804 1805 void Assembler::movw(Address dst, int imm16) { 1806 InstructionMark im(this); 1807 1808 emit_byte(0x66); // switch to 16-bit mode 1809 prefix(dst); 1810 emit_byte(0xC7); 1811 emit_operand(rax, dst, 2); 1812 emit_word(imm16); 1813 } 1814 1815 void Assembler::movw(Register dst, Address src) { 1816 InstructionMark im(this); 1817 emit_byte(0x66); 1818 prefix(src, dst); 1819 emit_byte(0x8B); 1820 emit_operand(dst, src); 1821 } 1822 1823 void Assembler::movw(Address dst, Register src) { 1824 InstructionMark im(this); 1825 emit_byte(0x66); 1826 prefix(dst, src); 1827 emit_byte(0x89); 1828 emit_operand(src, dst); 1829 } 1830 1831 void Assembler::movzbl(Register dst, Address src) { // movzxb 1832 InstructionMark im(this); 1833 prefix(src, dst); 1834 emit_byte(0x0F); 1835 emit_byte(0xB6); 1836 emit_operand(dst, src); 1837 } 1838 1839 void Assembler::movzbl(Register dst, Register src) { // movzxb 1840 NOT_LP64(assert(src->has_byte_register(), "must have byte register")); 1841 int encode = prefix_and_encode(dst->encoding(), src->encoding(), true); 1842 emit_byte(0x0F); 1843 emit_byte(0xB6); 1844 emit_byte(0xC0 | encode); 1845 } 1846 1847 void Assembler::movzwl(Register dst, Address src) { // movzxw 1848 InstructionMark im(this); 1849 prefix(src, dst); 1850 emit_byte(0x0F); 1851 emit_byte(0xB7); 1852 emit_operand(dst, src); 1853 } 1854 1855 void Assembler::movzwl(Register dst, Register src) { // movzxw 1856 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1857 emit_byte(0x0F); 1858 emit_byte(0xB7); 1859 emit_byte(0xC0 | encode); 1860 } 1861 1862 void Assembler::mull(Address src) { 1863 InstructionMark im(this); 1864 prefix(src); 1865 emit_byte(0xF7); 1866 emit_operand(rsp, src); 1867 } 1868 1869 void Assembler::mull(Register src) { 1870 int encode = prefix_and_encode(src->encoding()); 1871 emit_byte(0xF7); 1872 emit_byte(0xE0 | encode); 1873 } 1874 1875 void Assembler::mulsd(XMMRegister dst, Address src) { 1876 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1877 InstructionMark im(this); 1878 emit_byte(0xF2); 1879 prefix(src, dst); 1880 emit_byte(0x0F); 1881 emit_byte(0x59); 1882 emit_operand(dst, src); 1883 } 1884 1885 void Assembler::mulsd(XMMRegister dst, XMMRegister src) { 1886 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 1887 emit_byte(0xF2); 1888 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1889 emit_byte(0x0F); 1890 emit_byte(0x59); 1891 emit_byte(0xC0 | encode); 1892 } 1893 1894 void Assembler::mulss(XMMRegister dst, Address src) { 1895 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1896 InstructionMark im(this); 1897 emit_byte(0xF3); 1898 prefix(src, dst); 1899 emit_byte(0x0F); 1900 emit_byte(0x59); 1901 emit_operand(dst, src); 1902 } 1903 1904 void Assembler::mulss(XMMRegister dst, XMMRegister src) { 1905 NOT_LP64(assert(VM_Version::supports_sse(), "")); 1906 emit_byte(0xF3); 1907 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 1908 emit_byte(0x0F); 1909 emit_byte(0x59); 1910 emit_byte(0xC0 | encode); 1911 } 1912 1913 void Assembler::negl(Register dst) { 1914 int encode = prefix_and_encode(dst->encoding()); 1915 emit_byte(0xF7); 1916 emit_byte(0xD8 | encode); 1917 } 1918 1919 void Assembler::nop(int i) { 1920 #ifdef ASSERT 1921 assert(i > 0, " "); 1922 // The fancy nops aren't currently recognized by debuggers making it a 1923 // pain to disassemble code while debugging. If asserts are on clearly 1924 // speed is not an issue so simply use the single byte traditional nop 1925 // to do alignment. 1926 1927 for (; i > 0 ; i--) emit_byte(0x90); 1928 return; 1929 1930 #endif // ASSERT 1931 1932 if (UseAddressNop && VM_Version::is_intel()) { 1933 // 1934 // Using multi-bytes nops "0x0F 0x1F [address]" for Intel 1935 // 1: 0x90 1936 // 2: 0x66 0x90 1937 // 3: 0x66 0x66 0x90 (don't use "0x0F 0x1F 0x00" - need patching safe padding) 1938 // 4: 0x0F 0x1F 0x40 0x00 1939 // 5: 0x0F 0x1F 0x44 0x00 0x00 1940 // 6: 0x66 0x0F 0x1F 0x44 0x00 0x00 1941 // 7: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 1942 // 8: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 1943 // 9: 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 1944 // 10: 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 1945 // 11: 0x66 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 1946 1947 // The rest coding is Intel specific - don't use consecutive address nops 1948 1949 // 12: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90 1950 // 13: 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90 1951 // 14: 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90 1952 // 15: 0x66 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90 1953 1954 while(i >= 15) { 1955 // For Intel don't generate consecutive addess nops (mix with regular nops) 1956 i -= 15; 1957 emit_byte(0x66); // size prefix 1958 emit_byte(0x66); // size prefix 1959 emit_byte(0x66); // size prefix 1960 addr_nop_8(); 1961 emit_byte(0x66); // size prefix 1962 emit_byte(0x66); // size prefix 1963 emit_byte(0x66); // size prefix 1964 emit_byte(0x90); // nop 1965 } 1966 switch (i) { 1967 case 14: 1968 emit_byte(0x66); // size prefix 1969 case 13: 1970 emit_byte(0x66); // size prefix 1971 case 12: 1972 addr_nop_8(); 1973 emit_byte(0x66); // size prefix 1974 emit_byte(0x66); // size prefix 1975 emit_byte(0x66); // size prefix 1976 emit_byte(0x90); // nop 1977 break; 1978 case 11: 1979 emit_byte(0x66); // size prefix 1980 case 10: 1981 emit_byte(0x66); // size prefix 1982 case 9: 1983 emit_byte(0x66); // size prefix 1984 case 8: 1985 addr_nop_8(); 1986 break; 1987 case 7: 1988 addr_nop_7(); 1989 break; 1990 case 6: 1991 emit_byte(0x66); // size prefix 1992 case 5: 1993 addr_nop_5(); 1994 break; 1995 case 4: 1996 addr_nop_4(); 1997 break; 1998 case 3: 1999 // Don't use "0x0F 0x1F 0x00" - need patching safe padding 2000 emit_byte(0x66); // size prefix 2001 case 2: 2002 emit_byte(0x66); // size prefix 2003 case 1: 2004 emit_byte(0x90); // nop 2005 break; 2006 default: 2007 assert(i == 0, " "); 2008 } 2009 return; 2010 } 2011 if (UseAddressNop && VM_Version::is_amd()) { 2012 // 2013 // Using multi-bytes nops "0x0F 0x1F [address]" for AMD. 2014 // 1: 0x90 2015 // 2: 0x66 0x90 2016 // 3: 0x66 0x66 0x90 (don't use "0x0F 0x1F 0x00" - need patching safe padding) 2017 // 4: 0x0F 0x1F 0x40 0x00 2018 // 5: 0x0F 0x1F 0x44 0x00 0x00 2019 // 6: 0x66 0x0F 0x1F 0x44 0x00 0x00 2020 // 7: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 2021 // 8: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 2022 // 9: 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 2023 // 10: 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 2024 // 11: 0x66 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 2025 2026 // The rest coding is AMD specific - use consecutive address nops 2027 2028 // 12: 0x66 0x0F 0x1F 0x44 0x00 0x00 0x66 0x0F 0x1F 0x44 0x00 0x00 2029 // 13: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 0x66 0x0F 0x1F 0x44 0x00 0x00 2030 // 14: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 2031 // 15: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 2032 // 16: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 2033 // Size prefixes (0x66) are added for larger sizes 2034 2035 while(i >= 22) { 2036 i -= 11; 2037 emit_byte(0x66); // size prefix 2038 emit_byte(0x66); // size prefix 2039 emit_byte(0x66); // size prefix 2040 addr_nop_8(); 2041 } 2042 // Generate first nop for size between 21-12 2043 switch (i) { 2044 case 21: 2045 i -= 1; 2046 emit_byte(0x66); // size prefix 2047 case 20: 2048 case 19: 2049 i -= 1; 2050 emit_byte(0x66); // size prefix 2051 case 18: 2052 case 17: 2053 i -= 1; 2054 emit_byte(0x66); // size prefix 2055 case 16: 2056 case 15: 2057 i -= 8; 2058 addr_nop_8(); 2059 break; 2060 case 14: 2061 case 13: 2062 i -= 7; 2063 addr_nop_7(); 2064 break; 2065 case 12: 2066 i -= 6; 2067 emit_byte(0x66); // size prefix 2068 addr_nop_5(); 2069 break; 2070 default: 2071 assert(i < 12, " "); 2072 } 2073 2074 // Generate second nop for size between 11-1 2075 switch (i) { 2076 case 11: 2077 emit_byte(0x66); // size prefix 2078 case 10: 2079 emit_byte(0x66); // size prefix 2080 case 9: 2081 emit_byte(0x66); // size prefix 2082 case 8: 2083 addr_nop_8(); 2084 break; 2085 case 7: 2086 addr_nop_7(); 2087 break; 2088 case 6: 2089 emit_byte(0x66); // size prefix 2090 case 5: 2091 addr_nop_5(); 2092 break; 2093 case 4: 2094 addr_nop_4(); 2095 break; 2096 case 3: 2097 // Don't use "0x0F 0x1F 0x00" - need patching safe padding 2098 emit_byte(0x66); // size prefix 2099 case 2: 2100 emit_byte(0x66); // size prefix 2101 case 1: 2102 emit_byte(0x90); // nop 2103 break; 2104 default: 2105 assert(i == 0, " "); 2106 } 2107 return; 2108 } 2109 2110 // Using nops with size prefixes "0x66 0x90". 2111 // From AMD Optimization Guide: 2112 // 1: 0x90 2113 // 2: 0x66 0x90 2114 // 3: 0x66 0x66 0x90 2115 // 4: 0x66 0x66 0x66 0x90 2116 // 5: 0x66 0x66 0x90 0x66 0x90 2117 // 6: 0x66 0x66 0x90 0x66 0x66 0x90 2118 // 7: 0x66 0x66 0x66 0x90 0x66 0x66 0x90 2119 // 8: 0x66 0x66 0x66 0x90 0x66 0x66 0x66 0x90 2120 // 9: 0x66 0x66 0x90 0x66 0x66 0x90 0x66 0x66 0x90 2121 // 10: 0x66 0x66 0x66 0x90 0x66 0x66 0x90 0x66 0x66 0x90 2122 // 2123 while(i > 12) { 2124 i -= 4; 2125 emit_byte(0x66); // size prefix 2126 emit_byte(0x66); 2127 emit_byte(0x66); 2128 emit_byte(0x90); // nop 2129 } 2130 // 1 - 12 nops 2131 if(i > 8) { 2132 if(i > 9) { 2133 i -= 1; 2134 emit_byte(0x66); 2135 } 2136 i -= 3; 2137 emit_byte(0x66); 2138 emit_byte(0x66); 2139 emit_byte(0x90); 2140 } 2141 // 1 - 8 nops 2142 if(i > 4) { 2143 if(i > 6) { 2144 i -= 1; 2145 emit_byte(0x66); 2146 } 2147 i -= 3; 2148 emit_byte(0x66); 2149 emit_byte(0x66); 2150 emit_byte(0x90); 2151 } 2152 switch (i) { 2153 case 4: 2154 emit_byte(0x66); 2155 case 3: 2156 emit_byte(0x66); 2157 case 2: 2158 emit_byte(0x66); 2159 case 1: 2160 emit_byte(0x90); 2161 break; 2162 default: 2163 assert(i == 0, " "); 2164 } 2165 } 2166 2167 void Assembler::notl(Register dst) { 2168 int encode = prefix_and_encode(dst->encoding()); 2169 emit_byte(0xF7); 2170 emit_byte(0xD0 | encode ); 2171 } 2172 2173 void Assembler::orl(Address dst, int32_t imm32) { 2174 InstructionMark im(this); 2175 prefix(dst); 2176 emit_byte(0x81); 2177 emit_operand(rcx, dst, 4); 2178 emit_long(imm32); 2179 } 2180 2181 void Assembler::orl(Register dst, int32_t imm32) { 2182 prefix(dst); 2183 emit_arith(0x81, 0xC8, dst, imm32); 2184 } 2185 2186 2187 void Assembler::orl(Register dst, Address src) { 2188 InstructionMark im(this); 2189 prefix(src, dst); 2190 emit_byte(0x0B); 2191 emit_operand(dst, src); 2192 } 2193 2194 2195 void Assembler::orl(Register dst, Register src) { 2196 (void) prefix_and_encode(dst->encoding(), src->encoding()); 2197 emit_arith(0x0B, 0xC0, dst, src); 2198 } 2199 2200 void Assembler::pcmpestri(XMMRegister dst, Address src, int imm8) { 2201 assert(VM_Version::supports_sse4_2(), ""); 2202 2203 InstructionMark im(this); 2204 emit_byte(0x66); 2205 prefix(src, dst); 2206 emit_byte(0x0F); 2207 emit_byte(0x3A); 2208 emit_byte(0x61); 2209 emit_operand(dst, src); 2210 emit_byte(imm8); 2211 } 2212 2213 void Assembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) { 2214 assert(VM_Version::supports_sse4_2(), ""); 2215 2216 emit_byte(0x66); 2217 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 2218 emit_byte(0x0F); 2219 emit_byte(0x3A); 2220 emit_byte(0x61); 2221 emit_byte(0xC0 | encode); 2222 emit_byte(imm8); 2223 } 2224 2225 // generic 2226 void Assembler::pop(Register dst) { 2227 int encode = prefix_and_encode(dst->encoding()); 2228 emit_byte(0x58 | encode); 2229 } 2230 2231 void Assembler::popcntl(Register dst, Address src) { 2232 assert(VM_Version::supports_popcnt(), "must support"); 2233 InstructionMark im(this); 2234 emit_byte(0xF3); 2235 prefix(src, dst); 2236 emit_byte(0x0F); 2237 emit_byte(0xB8); 2238 emit_operand(dst, src); 2239 } 2240 2241 void Assembler::popcntl(Register dst, Register src) { 2242 assert(VM_Version::supports_popcnt(), "must support"); 2243 emit_byte(0xF3); 2244 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2245 emit_byte(0x0F); 2246 emit_byte(0xB8); 2247 emit_byte(0xC0 | encode); 2248 } 2249 2250 void Assembler::popf() { 2251 emit_byte(0x9D); 2252 } 2253 2254 #ifndef _LP64 // no 32bit push/pop on amd64 2255 void Assembler::popl(Address dst) { 2256 // NOTE: this will adjust stack by 8byte on 64bits 2257 InstructionMark im(this); 2258 prefix(dst); 2259 emit_byte(0x8F); 2260 emit_operand(rax, dst); 2261 } 2262 #endif 2263 2264 void Assembler::prefetch_prefix(Address src) { 2265 prefix(src); 2266 emit_byte(0x0F); 2267 } 2268 2269 void Assembler::prefetchnta(Address src) { 2270 NOT_LP64(assert(VM_Version::supports_sse2(), "must support")); 2271 InstructionMark im(this); 2272 prefetch_prefix(src); 2273 emit_byte(0x18); 2274 emit_operand(rax, src); // 0, src 2275 } 2276 2277 void Assembler::prefetchr(Address src) { 2278 NOT_LP64(assert(VM_Version::supports_3dnow(), "must support")); 2279 InstructionMark im(this); 2280 prefetch_prefix(src); 2281 emit_byte(0x0D); 2282 emit_operand(rax, src); // 0, src 2283 } 2284 2285 void Assembler::prefetcht0(Address src) { 2286 NOT_LP64(assert(VM_Version::supports_sse(), "must support")); 2287 InstructionMark im(this); 2288 prefetch_prefix(src); 2289 emit_byte(0x18); 2290 emit_operand(rcx, src); // 1, src 2291 } 2292 2293 void Assembler::prefetcht1(Address src) { 2294 NOT_LP64(assert(VM_Version::supports_sse(), "must support")); 2295 InstructionMark im(this); 2296 prefetch_prefix(src); 2297 emit_byte(0x18); 2298 emit_operand(rdx, src); // 2, src 2299 } 2300 2301 void Assembler::prefetcht2(Address src) { 2302 NOT_LP64(assert(VM_Version::supports_sse(), "must support")); 2303 InstructionMark im(this); 2304 prefetch_prefix(src); 2305 emit_byte(0x18); 2306 emit_operand(rbx, src); // 3, src 2307 } 2308 2309 void Assembler::prefetchw(Address src) { 2310 NOT_LP64(assert(VM_Version::supports_3dnow(), "must support")); 2311 InstructionMark im(this); 2312 prefetch_prefix(src); 2313 emit_byte(0x0D); 2314 emit_operand(rcx, src); // 1, src 2315 } 2316 2317 void Assembler::prefix(Prefix p) { 2318 a_byte(p); 2319 } 2320 2321 void Assembler::pshufd(XMMRegister dst, XMMRegister src, int mode) { 2322 assert(isByte(mode), "invalid value"); 2323 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2324 2325 emit_byte(0x66); 2326 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2327 emit_byte(0x0F); 2328 emit_byte(0x70); 2329 emit_byte(0xC0 | encode); 2330 emit_byte(mode & 0xFF); 2331 2332 } 2333 2334 void Assembler::pshufd(XMMRegister dst, Address src, int mode) { 2335 assert(isByte(mode), "invalid value"); 2336 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2337 2338 InstructionMark im(this); 2339 emit_byte(0x66); 2340 prefix(src, dst); 2341 emit_byte(0x0F); 2342 emit_byte(0x70); 2343 emit_operand(dst, src); 2344 emit_byte(mode & 0xFF); 2345 } 2346 2347 void Assembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) { 2348 assert(isByte(mode), "invalid value"); 2349 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2350 2351 emit_byte(0xF2); 2352 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2353 emit_byte(0x0F); 2354 emit_byte(0x70); 2355 emit_byte(0xC0 | encode); 2356 emit_byte(mode & 0xFF); 2357 } 2358 2359 void Assembler::pshuflw(XMMRegister dst, Address src, int mode) { 2360 assert(isByte(mode), "invalid value"); 2361 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2362 2363 InstructionMark im(this); 2364 emit_byte(0xF2); 2365 prefix(src, dst); // QQ new 2366 emit_byte(0x0F); 2367 emit_byte(0x70); 2368 emit_operand(dst, src); 2369 emit_byte(mode & 0xFF); 2370 } 2371 2372 void Assembler::psrlq(XMMRegister dst, int shift) { 2373 // HMM Table D-1 says sse2 or mmx 2374 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2375 2376 int encode = prefixq_and_encode(xmm2->encoding(), dst->encoding()); 2377 emit_byte(0x66); 2378 emit_byte(0x0F); 2379 emit_byte(0x73); 2380 emit_byte(0xC0 | encode); 2381 emit_byte(shift); 2382 } 2383 2384 void Assembler::ptest(XMMRegister dst, Address src) { 2385 assert(VM_Version::supports_sse4_1(), ""); 2386 2387 InstructionMark im(this); 2388 emit_byte(0x66); 2389 prefix(src, dst); 2390 emit_byte(0x0F); 2391 emit_byte(0x38); 2392 emit_byte(0x17); 2393 emit_operand(dst, src); 2394 } 2395 2396 void Assembler::ptest(XMMRegister dst, XMMRegister src) { 2397 assert(VM_Version::supports_sse4_1(), ""); 2398 2399 emit_byte(0x66); 2400 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 2401 emit_byte(0x0F); 2402 emit_byte(0x38); 2403 emit_byte(0x17); 2404 emit_byte(0xC0 | encode); 2405 } 2406 2407 void Assembler::punpcklbw(XMMRegister dst, XMMRegister src) { 2408 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2409 emit_byte(0x66); 2410 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2411 emit_byte(0x0F); 2412 emit_byte(0x60); 2413 emit_byte(0xC0 | encode); 2414 } 2415 2416 void Assembler::push(int32_t imm32) { 2417 // in 64bits we push 64bits onto the stack but only 2418 // take a 32bit immediate 2419 emit_byte(0x68); 2420 emit_long(imm32); 2421 } 2422 2423 void Assembler::push(Register src) { 2424 int encode = prefix_and_encode(src->encoding()); 2425 2426 emit_byte(0x50 | encode); 2427 } 2428 2429 void Assembler::pushf() { 2430 emit_byte(0x9C); 2431 } 2432 2433 #ifndef _LP64 // no 32bit push/pop on amd64 2434 void Assembler::pushl(Address src) { 2435 // Note this will push 64bit on 64bit 2436 InstructionMark im(this); 2437 prefix(src); 2438 emit_byte(0xFF); 2439 emit_operand(rsi, src); 2440 } 2441 #endif 2442 2443 void Assembler::pxor(XMMRegister dst, Address src) { 2444 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2445 InstructionMark im(this); 2446 emit_byte(0x66); 2447 prefix(src, dst); 2448 emit_byte(0x0F); 2449 emit_byte(0xEF); 2450 emit_operand(dst, src); 2451 } 2452 2453 void Assembler::pxor(XMMRegister dst, XMMRegister src) { 2454 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2455 InstructionMark im(this); 2456 emit_byte(0x66); 2457 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2458 emit_byte(0x0F); 2459 emit_byte(0xEF); 2460 emit_byte(0xC0 | encode); 2461 } 2462 2463 void Assembler::rcll(Register dst, int imm8) { 2464 assert(isShiftCount(imm8), "illegal shift count"); 2465 int encode = prefix_and_encode(dst->encoding()); 2466 if (imm8 == 1) { 2467 emit_byte(0xD1); 2468 emit_byte(0xD0 | encode); 2469 } else { 2470 emit_byte(0xC1); 2471 emit_byte(0xD0 | encode); 2472 emit_byte(imm8); 2473 } 2474 } 2475 2476 // copies data from [esi] to [edi] using rcx pointer sized words 2477 // generic 2478 void Assembler::rep_mov() { 2479 emit_byte(0xF3); 2480 // MOVSQ 2481 LP64_ONLY(prefix(REX_W)); 2482 emit_byte(0xA5); 2483 } 2484 2485 // sets rcx pointer sized words with rax, value at [edi] 2486 // generic 2487 void Assembler::rep_set() { // rep_set 2488 emit_byte(0xF3); 2489 // STOSQ 2490 LP64_ONLY(prefix(REX_W)); 2491 emit_byte(0xAB); 2492 } 2493 2494 // scans rcx pointer sized words at [edi] for occurance of rax, 2495 // generic 2496 void Assembler::repne_scan() { // repne_scan 2497 emit_byte(0xF2); 2498 // SCASQ 2499 LP64_ONLY(prefix(REX_W)); 2500 emit_byte(0xAF); 2501 } 2502 2503 #ifdef _LP64 2504 // scans rcx 4 byte words at [edi] for occurance of rax, 2505 // generic 2506 void Assembler::repne_scanl() { // repne_scan 2507 emit_byte(0xF2); 2508 // SCASL 2509 emit_byte(0xAF); 2510 } 2511 #endif 2512 2513 void Assembler::ret(int imm16) { 2514 if (imm16 == 0) { 2515 emit_byte(0xC3); 2516 } else { 2517 emit_byte(0xC2); 2518 emit_word(imm16); 2519 } 2520 } 2521 2522 void Assembler::sahf() { 2523 #ifdef _LP64 2524 // Not supported in 64bit mode 2525 ShouldNotReachHere(); 2526 #endif 2527 emit_byte(0x9E); 2528 } 2529 2530 void Assembler::sarl(Register dst, int imm8) { 2531 int encode = prefix_and_encode(dst->encoding()); 2532 assert(isShiftCount(imm8), "illegal shift count"); 2533 if (imm8 == 1) { 2534 emit_byte(0xD1); 2535 emit_byte(0xF8 | encode); 2536 } else { 2537 emit_byte(0xC1); 2538 emit_byte(0xF8 | encode); 2539 emit_byte(imm8); 2540 } 2541 } 2542 2543 void Assembler::sarl(Register dst) { 2544 int encode = prefix_and_encode(dst->encoding()); 2545 emit_byte(0xD3); 2546 emit_byte(0xF8 | encode); 2547 } 2548 2549 void Assembler::sbbl(Address dst, int32_t imm32) { 2550 InstructionMark im(this); 2551 prefix(dst); 2552 emit_arith_operand(0x81, rbx, dst, imm32); 2553 } 2554 2555 void Assembler::sbbl(Register dst, int32_t imm32) { 2556 prefix(dst); 2557 emit_arith(0x81, 0xD8, dst, imm32); 2558 } 2559 2560 2561 void Assembler::sbbl(Register dst, Address src) { 2562 InstructionMark im(this); 2563 prefix(src, dst); 2564 emit_byte(0x1B); 2565 emit_operand(dst, src); 2566 } 2567 2568 void Assembler::sbbl(Register dst, Register src) { 2569 (void) prefix_and_encode(dst->encoding(), src->encoding()); 2570 emit_arith(0x1B, 0xC0, dst, src); 2571 } 2572 2573 void Assembler::setb(Condition cc, Register dst) { 2574 assert(0 <= cc && cc < 16, "illegal cc"); 2575 int encode = prefix_and_encode(dst->encoding(), true); 2576 emit_byte(0x0F); 2577 emit_byte(0x90 | cc); 2578 emit_byte(0xC0 | encode); 2579 } 2580 2581 void Assembler::shll(Register dst, int imm8) { 2582 assert(isShiftCount(imm8), "illegal shift count"); 2583 int encode = prefix_and_encode(dst->encoding()); 2584 if (imm8 == 1 ) { 2585 emit_byte(0xD1); 2586 emit_byte(0xE0 | encode); 2587 } else { 2588 emit_byte(0xC1); 2589 emit_byte(0xE0 | encode); 2590 emit_byte(imm8); 2591 } 2592 } 2593 2594 void Assembler::shll(Register dst) { 2595 int encode = prefix_and_encode(dst->encoding()); 2596 emit_byte(0xD3); 2597 emit_byte(0xE0 | encode); 2598 } 2599 2600 void Assembler::shrl(Register dst, int imm8) { 2601 assert(isShiftCount(imm8), "illegal shift count"); 2602 int encode = prefix_and_encode(dst->encoding()); 2603 emit_byte(0xC1); 2604 emit_byte(0xE8 | encode); 2605 emit_byte(imm8); 2606 } 2607 2608 void Assembler::shrl(Register dst) { 2609 int encode = prefix_and_encode(dst->encoding()); 2610 emit_byte(0xD3); 2611 emit_byte(0xE8 | encode); 2612 } 2613 2614 // copies a single word from [esi] to [edi] 2615 void Assembler::smovl() { 2616 emit_byte(0xA5); 2617 } 2618 2619 void Assembler::sqrtsd(XMMRegister dst, XMMRegister src) { 2620 // HMM Table D-1 says sse2 2621 // NOT_LP64(assert(VM_Version::supports_sse(), "")); 2622 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2623 emit_byte(0xF2); 2624 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2625 emit_byte(0x0F); 2626 emit_byte(0x51); 2627 emit_byte(0xC0 | encode); 2628 } 2629 2630 void Assembler::stmxcsr( Address dst) { 2631 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2632 InstructionMark im(this); 2633 prefix(dst); 2634 emit_byte(0x0F); 2635 emit_byte(0xAE); 2636 emit_operand(as_Register(3), dst); 2637 } 2638 2639 void Assembler::subl(Address dst, int32_t imm32) { 2640 InstructionMark im(this); 2641 prefix(dst); 2642 if (is8bit(imm32)) { 2643 emit_byte(0x83); 2644 emit_operand(rbp, dst, 1); 2645 emit_byte(imm32 & 0xFF); 2646 } else { 2647 emit_byte(0x81); 2648 emit_operand(rbp, dst, 4); 2649 emit_long(imm32); 2650 } 2651 } 2652 2653 void Assembler::subl(Register dst, int32_t imm32) { 2654 prefix(dst); 2655 emit_arith(0x81, 0xE8, dst, imm32); 2656 } 2657 2658 void Assembler::subl(Address dst, Register src) { 2659 InstructionMark im(this); 2660 prefix(dst, src); 2661 emit_byte(0x29); 2662 emit_operand(src, dst); 2663 } 2664 2665 void Assembler::subl(Register dst, Address src) { 2666 InstructionMark im(this); 2667 prefix(src, dst); 2668 emit_byte(0x2B); 2669 emit_operand(dst, src); 2670 } 2671 2672 void Assembler::subl(Register dst, Register src) { 2673 (void) prefix_and_encode(dst->encoding(), src->encoding()); 2674 emit_arith(0x2B, 0xC0, dst, src); 2675 } 2676 2677 void Assembler::subsd(XMMRegister dst, XMMRegister src) { 2678 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2679 emit_byte(0xF2); 2680 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2681 emit_byte(0x0F); 2682 emit_byte(0x5C); 2683 emit_byte(0xC0 | encode); 2684 } 2685 2686 void Assembler::subsd(XMMRegister dst, Address src) { 2687 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2688 InstructionMark im(this); 2689 emit_byte(0xF2); 2690 prefix(src, dst); 2691 emit_byte(0x0F); 2692 emit_byte(0x5C); 2693 emit_operand(dst, src); 2694 } 2695 2696 void Assembler::subss(XMMRegister dst, XMMRegister src) { 2697 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2698 emit_byte(0xF3); 2699 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2700 emit_byte(0x0F); 2701 emit_byte(0x5C); 2702 emit_byte(0xC0 | encode); 2703 } 2704 2705 void Assembler::subss(XMMRegister dst, Address src) { 2706 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2707 InstructionMark im(this); 2708 emit_byte(0xF3); 2709 prefix(src, dst); 2710 emit_byte(0x0F); 2711 emit_byte(0x5C); 2712 emit_operand(dst, src); 2713 } 2714 2715 void Assembler::testb(Register dst, int imm8) { 2716 NOT_LP64(assert(dst->has_byte_register(), "must have byte register")); 2717 (void) prefix_and_encode(dst->encoding(), true); 2718 emit_arith_b(0xF6, 0xC0, dst, imm8); 2719 } 2720 2721 void Assembler::testl(Register dst, int32_t imm32) { 2722 // not using emit_arith because test 2723 // doesn't support sign-extension of 2724 // 8bit operands 2725 int encode = dst->encoding(); 2726 if (encode == 0) { 2727 emit_byte(0xA9); 2728 } else { 2729 encode = prefix_and_encode(encode); 2730 emit_byte(0xF7); 2731 emit_byte(0xC0 | encode); 2732 } 2733 emit_long(imm32); 2734 } 2735 2736 void Assembler::testl(Register dst, Register src) { 2737 (void) prefix_and_encode(dst->encoding(), src->encoding()); 2738 emit_arith(0x85, 0xC0, dst, src); 2739 } 2740 2741 void Assembler::testl(Register dst, Address src) { 2742 InstructionMark im(this); 2743 prefix(src, dst); 2744 emit_byte(0x85); 2745 emit_operand(dst, src); 2746 } 2747 2748 void Assembler::ucomisd(XMMRegister dst, Address src) { 2749 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2750 emit_byte(0x66); 2751 ucomiss(dst, src); 2752 } 2753 2754 void Assembler::ucomisd(XMMRegister dst, XMMRegister src) { 2755 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2756 emit_byte(0x66); 2757 ucomiss(dst, src); 2758 } 2759 2760 void Assembler::ucomiss(XMMRegister dst, Address src) { 2761 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2762 2763 InstructionMark im(this); 2764 prefix(src, dst); 2765 emit_byte(0x0F); 2766 emit_byte(0x2E); 2767 emit_operand(dst, src); 2768 } 2769 2770 void Assembler::ucomiss(XMMRegister dst, XMMRegister src) { 2771 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2772 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2773 emit_byte(0x0F); 2774 emit_byte(0x2E); 2775 emit_byte(0xC0 | encode); 2776 } 2777 2778 2779 void Assembler::xaddl(Address dst, Register src) { 2780 InstructionMark im(this); 2781 prefix(dst, src); 2782 emit_byte(0x0F); 2783 emit_byte(0xC1); 2784 emit_operand(src, dst); 2785 } 2786 2787 void Assembler::xchgl(Register dst, Address src) { // xchg 2788 InstructionMark im(this); 2789 prefix(src, dst); 2790 emit_byte(0x87); 2791 emit_operand(dst, src); 2792 } 2793 2794 void Assembler::xchgl(Register dst, Register src) { 2795 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2796 emit_byte(0x87); 2797 emit_byte(0xc0 | encode); 2798 } 2799 2800 void Assembler::xorl(Register dst, int32_t imm32) { 2801 prefix(dst); 2802 emit_arith(0x81, 0xF0, dst, imm32); 2803 } 2804 2805 void Assembler::xorl(Register dst, Address src) { 2806 InstructionMark im(this); 2807 prefix(src, dst); 2808 emit_byte(0x33); 2809 emit_operand(dst, src); 2810 } 2811 2812 void Assembler::xorl(Register dst, Register src) { 2813 (void) prefix_and_encode(dst->encoding(), src->encoding()); 2814 emit_arith(0x33, 0xC0, dst, src); 2815 } 2816 2817 void Assembler::xorpd(XMMRegister dst, XMMRegister src) { 2818 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2819 emit_byte(0x66); 2820 xorps(dst, src); 2821 } 2822 2823 void Assembler::xorpd(XMMRegister dst, Address src) { 2824 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 2825 InstructionMark im(this); 2826 emit_byte(0x66); 2827 prefix(src, dst); 2828 emit_byte(0x0F); 2829 emit_byte(0x57); 2830 emit_operand(dst, src); 2831 } 2832 2833 2834 void Assembler::xorps(XMMRegister dst, XMMRegister src) { 2835 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2836 int encode = prefix_and_encode(dst->encoding(), src->encoding()); 2837 emit_byte(0x0F); 2838 emit_byte(0x57); 2839 emit_byte(0xC0 | encode); 2840 } 2841 2842 void Assembler::xorps(XMMRegister dst, Address src) { 2843 NOT_LP64(assert(VM_Version::supports_sse(), "")); 2844 InstructionMark im(this); 2845 prefix(src, dst); 2846 emit_byte(0x0F); 2847 emit_byte(0x57); 2848 emit_operand(dst, src); 2849 } 2850 2851 #ifndef _LP64 2852 // 32bit only pieces of the assembler 2853 2854 void Assembler::cmp_literal32(Register src1, int32_t imm32, RelocationHolder const& rspec) { 2855 // NO PREFIX AS NEVER 64BIT 2856 InstructionMark im(this); 2857 emit_byte(0x81); 2858 emit_byte(0xF8 | src1->encoding()); 2859 emit_data(imm32, rspec, 0); 2860 } 2861 2862 void Assembler::cmp_literal32(Address src1, int32_t imm32, RelocationHolder const& rspec) { 2863 // NO PREFIX AS NEVER 64BIT (not even 32bit versions of 64bit regs 2864 InstructionMark im(this); 2865 emit_byte(0x81); 2866 emit_operand(rdi, src1); 2867 emit_data(imm32, rspec, 0); 2868 } 2869 2870 // The 64-bit (32bit platform) cmpxchg compares the value at adr with the contents of rdx:rax, 2871 // and stores rcx:rbx into adr if so; otherwise, the value at adr is loaded 2872 // into rdx:rax. The ZF is set if the compared values were equal, and cleared otherwise. 2873 void Assembler::cmpxchg8(Address adr) { 2874 InstructionMark im(this); 2875 emit_byte(0x0F); 2876 emit_byte(0xc7); 2877 emit_operand(rcx, adr); 2878 } 2879 2880 void Assembler::decl(Register dst) { 2881 // Don't use it directly. Use MacroAssembler::decrementl() instead. 2882 emit_byte(0x48 | dst->encoding()); 2883 } 2884 2885 #endif // _LP64 2886 2887 // 64bit typically doesn't use the x87 but needs to for the trig funcs 2888 2889 void Assembler::fabs() { 2890 emit_byte(0xD9); 2891 emit_byte(0xE1); 2892 } 2893 2894 void Assembler::fadd(int i) { 2895 emit_farith(0xD8, 0xC0, i); 2896 } 2897 2898 void Assembler::fadd_d(Address src) { 2899 InstructionMark im(this); 2900 emit_byte(0xDC); 2901 emit_operand32(rax, src); 2902 } 2903 2904 void Assembler::fadd_s(Address src) { 2905 InstructionMark im(this); 2906 emit_byte(0xD8); 2907 emit_operand32(rax, src); 2908 } 2909 2910 void Assembler::fadda(int i) { 2911 emit_farith(0xDC, 0xC0, i); 2912 } 2913 2914 void Assembler::faddp(int i) { 2915 emit_farith(0xDE, 0xC0, i); 2916 } 2917 2918 void Assembler::fchs() { 2919 emit_byte(0xD9); 2920 emit_byte(0xE0); 2921 } 2922 2923 void Assembler::fcom(int i) { 2924 emit_farith(0xD8, 0xD0, i); 2925 } 2926 2927 void Assembler::fcomp(int i) { 2928 emit_farith(0xD8, 0xD8, i); 2929 } 2930 2931 void Assembler::fcomp_d(Address src) { 2932 InstructionMark im(this); 2933 emit_byte(0xDC); 2934 emit_operand32(rbx, src); 2935 } 2936 2937 void Assembler::fcomp_s(Address src) { 2938 InstructionMark im(this); 2939 emit_byte(0xD8); 2940 emit_operand32(rbx, src); 2941 } 2942 2943 void Assembler::fcompp() { 2944 emit_byte(0xDE); 2945 emit_byte(0xD9); 2946 } 2947 2948 void Assembler::fcos() { 2949 emit_byte(0xD9); 2950 emit_byte(0xFF); 2951 } 2952 2953 void Assembler::fdecstp() { 2954 emit_byte(0xD9); 2955 emit_byte(0xF6); 2956 } 2957 2958 void Assembler::fdiv(int i) { 2959 emit_farith(0xD8, 0xF0, i); 2960 } 2961 2962 void Assembler::fdiv_d(Address src) { 2963 InstructionMark im(this); 2964 emit_byte(0xDC); 2965 emit_operand32(rsi, src); 2966 } 2967 2968 void Assembler::fdiv_s(Address src) { 2969 InstructionMark im(this); 2970 emit_byte(0xD8); 2971 emit_operand32(rsi, src); 2972 } 2973 2974 void Assembler::fdiva(int i) { 2975 emit_farith(0xDC, 0xF8, i); 2976 } 2977 2978 // Note: The Intel manual (Pentium Processor User's Manual, Vol.3, 1994) 2979 // is erroneous for some of the floating-point instructions below. 2980 2981 void Assembler::fdivp(int i) { 2982 emit_farith(0xDE, 0xF8, i); // ST(0) <- ST(0) / ST(1) and pop (Intel manual wrong) 2983 } 2984 2985 void Assembler::fdivr(int i) { 2986 emit_farith(0xD8, 0xF8, i); 2987 } 2988 2989 void Assembler::fdivr_d(Address src) { 2990 InstructionMark im(this); 2991 emit_byte(0xDC); 2992 emit_operand32(rdi, src); 2993 } 2994 2995 void Assembler::fdivr_s(Address src) { 2996 InstructionMark im(this); 2997 emit_byte(0xD8); 2998 emit_operand32(rdi, src); 2999 } 3000 3001 void Assembler::fdivra(int i) { 3002 emit_farith(0xDC, 0xF0, i); 3003 } 3004 3005 void Assembler::fdivrp(int i) { 3006 emit_farith(0xDE, 0xF0, i); // ST(0) <- ST(1) / ST(0) and pop (Intel manual wrong) 3007 } 3008 3009 void Assembler::ffree(int i) { 3010 emit_farith(0xDD, 0xC0, i); 3011 } 3012 3013 void Assembler::fild_d(Address adr) { 3014 InstructionMark im(this); 3015 emit_byte(0xDF); 3016 emit_operand32(rbp, adr); 3017 } 3018 3019 void Assembler::fild_s(Address adr) { 3020 InstructionMark im(this); 3021 emit_byte(0xDB); 3022 emit_operand32(rax, adr); 3023 } 3024 3025 void Assembler::fincstp() { 3026 emit_byte(0xD9); 3027 emit_byte(0xF7); 3028 } 3029 3030 void Assembler::finit() { 3031 emit_byte(0x9B); 3032 emit_byte(0xDB); 3033 emit_byte(0xE3); 3034 } 3035 3036 void Assembler::fist_s(Address adr) { 3037 InstructionMark im(this); 3038 emit_byte(0xDB); 3039 emit_operand32(rdx, adr); 3040 } 3041 3042 void Assembler::fistp_d(Address adr) { 3043 InstructionMark im(this); 3044 emit_byte(0xDF); 3045 emit_operand32(rdi, adr); 3046 } 3047 3048 void Assembler::fistp_s(Address adr) { 3049 InstructionMark im(this); 3050 emit_byte(0xDB); 3051 emit_operand32(rbx, adr); 3052 } 3053 3054 void Assembler::fld1() { 3055 emit_byte(0xD9); 3056 emit_byte(0xE8); 3057 } 3058 3059 void Assembler::fld_d(Address adr) { 3060 InstructionMark im(this); 3061 emit_byte(0xDD); 3062 emit_operand32(rax, adr); 3063 } 3064 3065 void Assembler::fld_s(Address adr) { 3066 InstructionMark im(this); 3067 emit_byte(0xD9); 3068 emit_operand32(rax, adr); 3069 } 3070 3071 3072 void Assembler::fld_s(int index) { 3073 emit_farith(0xD9, 0xC0, index); 3074 } 3075 3076 void Assembler::fld_x(Address adr) { 3077 InstructionMark im(this); 3078 emit_byte(0xDB); 3079 emit_operand32(rbp, adr); 3080 } 3081 3082 void Assembler::fldcw(Address src) { 3083 InstructionMark im(this); 3084 emit_byte(0xd9); 3085 emit_operand32(rbp, src); 3086 } 3087 3088 void Assembler::fldenv(Address src) { 3089 InstructionMark im(this); 3090 emit_byte(0xD9); 3091 emit_operand32(rsp, src); 3092 } 3093 3094 void Assembler::fldlg2() { 3095 emit_byte(0xD9); 3096 emit_byte(0xEC); 3097 } 3098 3099 void Assembler::fldln2() { 3100 emit_byte(0xD9); 3101 emit_byte(0xED); 3102 } 3103 3104 void Assembler::fldz() { 3105 emit_byte(0xD9); 3106 emit_byte(0xEE); 3107 } 3108 3109 void Assembler::flog() { 3110 fldln2(); 3111 fxch(); 3112 fyl2x(); 3113 } 3114 3115 void Assembler::flog10() { 3116 fldlg2(); 3117 fxch(); 3118 fyl2x(); 3119 } 3120 3121 void Assembler::fmul(int i) { 3122 emit_farith(0xD8, 0xC8, i); 3123 } 3124 3125 void Assembler::fmul_d(Address src) { 3126 InstructionMark im(this); 3127 emit_byte(0xDC); 3128 emit_operand32(rcx, src); 3129 } 3130 3131 void Assembler::fmul_s(Address src) { 3132 InstructionMark im(this); 3133 emit_byte(0xD8); 3134 emit_operand32(rcx, src); 3135 } 3136 3137 void Assembler::fmula(int i) { 3138 emit_farith(0xDC, 0xC8, i); 3139 } 3140 3141 void Assembler::fmulp(int i) { 3142 emit_farith(0xDE, 0xC8, i); 3143 } 3144 3145 void Assembler::fnsave(Address dst) { 3146 InstructionMark im(this); 3147 emit_byte(0xDD); 3148 emit_operand32(rsi, dst); 3149 } 3150 3151 void Assembler::fnstcw(Address src) { 3152 InstructionMark im(this); 3153 emit_byte(0x9B); 3154 emit_byte(0xD9); 3155 emit_operand32(rdi, src); 3156 } 3157 3158 void Assembler::fnstsw_ax() { 3159 emit_byte(0xdF); 3160 emit_byte(0xE0); 3161 } 3162 3163 void Assembler::fprem() { 3164 emit_byte(0xD9); 3165 emit_byte(0xF8); 3166 } 3167 3168 void Assembler::fprem1() { 3169 emit_byte(0xD9); 3170 emit_byte(0xF5); 3171 } 3172 3173 void Assembler::frstor(Address src) { 3174 InstructionMark im(this); 3175 emit_byte(0xDD); 3176 emit_operand32(rsp, src); 3177 } 3178 3179 void Assembler::fsin() { 3180 emit_byte(0xD9); 3181 emit_byte(0xFE); 3182 } 3183 3184 void Assembler::fsqrt() { 3185 emit_byte(0xD9); 3186 emit_byte(0xFA); 3187 } 3188 3189 void Assembler::fst_d(Address adr) { 3190 InstructionMark im(this); 3191 emit_byte(0xDD); 3192 emit_operand32(rdx, adr); 3193 } 3194 3195 void Assembler::fst_s(Address adr) { 3196 InstructionMark im(this); 3197 emit_byte(0xD9); 3198 emit_operand32(rdx, adr); 3199 } 3200 3201 void Assembler::fstp_d(Address adr) { 3202 InstructionMark im(this); 3203 emit_byte(0xDD); 3204 emit_operand32(rbx, adr); 3205 } 3206 3207 void Assembler::fstp_d(int index) { 3208 emit_farith(0xDD, 0xD8, index); 3209 } 3210 3211 void Assembler::fstp_s(Address adr) { 3212 InstructionMark im(this); 3213 emit_byte(0xD9); 3214 emit_operand32(rbx, adr); 3215 } 3216 3217 void Assembler::fstp_x(Address adr) { 3218 InstructionMark im(this); 3219 emit_byte(0xDB); 3220 emit_operand32(rdi, adr); 3221 } 3222 3223 void Assembler::fsub(int i) { 3224 emit_farith(0xD8, 0xE0, i); 3225 } 3226 3227 void Assembler::fsub_d(Address src) { 3228 InstructionMark im(this); 3229 emit_byte(0xDC); 3230 emit_operand32(rsp, src); 3231 } 3232 3233 void Assembler::fsub_s(Address src) { 3234 InstructionMark im(this); 3235 emit_byte(0xD8); 3236 emit_operand32(rsp, src); 3237 } 3238 3239 void Assembler::fsuba(int i) { 3240 emit_farith(0xDC, 0xE8, i); 3241 } 3242 3243 void Assembler::fsubp(int i) { 3244 emit_farith(0xDE, 0xE8, i); // ST(0) <- ST(0) - ST(1) and pop (Intel manual wrong) 3245 } 3246 3247 void Assembler::fsubr(int i) { 3248 emit_farith(0xD8, 0xE8, i); 3249 } 3250 3251 void Assembler::fsubr_d(Address src) { 3252 InstructionMark im(this); 3253 emit_byte(0xDC); 3254 emit_operand32(rbp, src); 3255 } 3256 3257 void Assembler::fsubr_s(Address src) { 3258 InstructionMark im(this); 3259 emit_byte(0xD8); 3260 emit_operand32(rbp, src); 3261 } 3262 3263 void Assembler::fsubra(int i) { 3264 emit_farith(0xDC, 0xE0, i); 3265 } 3266 3267 void Assembler::fsubrp(int i) { 3268 emit_farith(0xDE, 0xE0, i); // ST(0) <- ST(1) - ST(0) and pop (Intel manual wrong) 3269 } 3270 3271 void Assembler::ftan() { 3272 emit_byte(0xD9); 3273 emit_byte(0xF2); 3274 emit_byte(0xDD); 3275 emit_byte(0xD8); 3276 } 3277 3278 void Assembler::ftst() { 3279 emit_byte(0xD9); 3280 emit_byte(0xE4); 3281 } 3282 3283 void Assembler::fucomi(int i) { 3284 // make sure the instruction is supported (introduced for P6, together with cmov) 3285 guarantee(VM_Version::supports_cmov(), "illegal instruction"); 3286 emit_farith(0xDB, 0xE8, i); 3287 } 3288 3289 void Assembler::fucomip(int i) { 3290 // make sure the instruction is supported (introduced for P6, together with cmov) 3291 guarantee(VM_Version::supports_cmov(), "illegal instruction"); 3292 emit_farith(0xDF, 0xE8, i); 3293 } 3294 3295 void Assembler::fwait() { 3296 emit_byte(0x9B); 3297 } 3298 3299 void Assembler::fxch(int i) { 3300 emit_farith(0xD9, 0xC8, i); 3301 } 3302 3303 void Assembler::fyl2x() { 3304 emit_byte(0xD9); 3305 emit_byte(0xF1); 3306 } 3307 3308 3309 #ifndef _LP64 3310 3311 void Assembler::incl(Register dst) { 3312 // Don't use it directly. Use MacroAssembler::incrementl() instead. 3313 emit_byte(0x40 | dst->encoding()); 3314 } 3315 3316 void Assembler::lea(Register dst, Address src) { 3317 leal(dst, src); 3318 } 3319 3320 void Assembler::mov_literal32(Address dst, int32_t imm32, RelocationHolder const& rspec) { 3321 InstructionMark im(this); 3322 emit_byte(0xC7); 3323 emit_operand(rax, dst); 3324 emit_data((int)imm32, rspec, 0); 3325 } 3326 3327 void Assembler::mov_literal32(Register dst, int32_t imm32, RelocationHolder const& rspec) { 3328 InstructionMark im(this); 3329 int encode = prefix_and_encode(dst->encoding()); 3330 emit_byte(0xB8 | encode); 3331 emit_data((int)imm32, rspec, 0); 3332 } 3333 3334 void Assembler::popa() { // 32bit 3335 emit_byte(0x61); 3336 } 3337 3338 void Assembler::push_literal32(int32_t imm32, RelocationHolder const& rspec) { 3339 InstructionMark im(this); 3340 emit_byte(0x68); 3341 emit_data(imm32, rspec, 0); 3342 } 3343 3344 void Assembler::pusha() { // 32bit 3345 emit_byte(0x60); 3346 } 3347 3348 void Assembler::set_byte_if_not_zero(Register dst) { 3349 emit_byte(0x0F); 3350 emit_byte(0x95); 3351 emit_byte(0xE0 | dst->encoding()); 3352 } 3353 3354 void Assembler::shldl(Register dst, Register src) { 3355 emit_byte(0x0F); 3356 emit_byte(0xA5); 3357 emit_byte(0xC0 | src->encoding() << 3 | dst->encoding()); 3358 } 3359 3360 void Assembler::shrdl(Register dst, Register src) { 3361 emit_byte(0x0F); 3362 emit_byte(0xAD); 3363 emit_byte(0xC0 | src->encoding() << 3 | dst->encoding()); 3364 } 3365 3366 #else // LP64 3367 3368 void Assembler::set_byte_if_not_zero(Register dst) { 3369 int enc = prefix_and_encode(dst->encoding(), true); 3370 emit_byte(0x0F); 3371 emit_byte(0x95); 3372 emit_byte(0xE0 | enc); 3373 } 3374 3375 // 64bit only pieces of the assembler 3376 // This should only be used by 64bit instructions that can use rip-relative 3377 // it cannot be used by instructions that want an immediate value. 3378 3379 bool Assembler::reachable(AddressLiteral adr) { 3380 int64_t disp; 3381 // None will force a 64bit literal to the code stream. Likely a placeholder 3382 // for something that will be patched later and we need to certain it will 3383 // always be reachable. 3384 if (adr.reloc() == relocInfo::none) { 3385 return false; 3386 } 3387 if (adr.reloc() == relocInfo::internal_word_type) { 3388 // This should be rip relative and easily reachable. 3389 return true; 3390 } 3391 if (adr.reloc() == relocInfo::virtual_call_type || 3392 adr.reloc() == relocInfo::opt_virtual_call_type || 3393 adr.reloc() == relocInfo::static_call_type || 3394 adr.reloc() == relocInfo::static_stub_type ) { 3395 // This should be rip relative within the code cache and easily 3396 // reachable until we get huge code caches. (At which point 3397 // ic code is going to have issues). 3398 return true; 3399 } 3400 if (adr.reloc() != relocInfo::external_word_type && 3401 adr.reloc() != relocInfo::poll_return_type && // these are really external_word but need special 3402 adr.reloc() != relocInfo::poll_type && // relocs to identify them 3403 adr.reloc() != relocInfo::runtime_call_type ) { 3404 return false; 3405 } 3406 3407 // Stress the correction code 3408 if (ForceUnreachable) { 3409 // Must be runtimecall reloc, see if it is in the codecache 3410 // Flipping stuff in the codecache to be unreachable causes issues 3411 // with things like inline caches where the additional instructions 3412 // are not handled. 3413 if (CodeCache::find_blob(adr._target) == NULL) { 3414 return false; 3415 } 3416 } 3417 // For external_word_type/runtime_call_type if it is reachable from where we 3418 // are now (possibly a temp buffer) and where we might end up 3419 // anywhere in the codeCache then we are always reachable. 3420 // This would have to change if we ever save/restore shared code 3421 // to be more pessimistic. 3422 3423 disp = (int64_t)adr._target - ((int64_t)CodeCache::low_bound() + sizeof(int)); 3424 if (!is_simm32(disp)) return false; 3425 disp = (int64_t)adr._target - ((int64_t)CodeCache::high_bound() + sizeof(int)); 3426 if (!is_simm32(disp)) return false; 3427 3428 disp = (int64_t)adr._target - ((int64_t)_code_pos + sizeof(int)); 3429 3430 // Because rip relative is a disp + address_of_next_instruction and we 3431 // don't know the value of address_of_next_instruction we apply a fudge factor 3432 // to make sure we will be ok no matter the size of the instruction we get placed into. 3433 // We don't have to fudge the checks above here because they are already worst case. 3434 3435 // 12 == override/rex byte, opcode byte, rm byte, sib byte, a 4-byte disp , 4-byte literal 3436 // + 4 because better safe than sorry. 3437 const int fudge = 12 + 4; 3438 if (disp < 0) { 3439 disp -= fudge; 3440 } else { 3441 disp += fudge; 3442 } 3443 return is_simm32(disp); 3444 } 3445 3446 void Assembler::emit_data64(jlong data, 3447 relocInfo::relocType rtype, 3448 int format) { 3449 if (rtype == relocInfo::none) { 3450 emit_long64(data); 3451 } else { 3452 emit_data64(data, Relocation::spec_simple(rtype), format); 3453 } 3454 } 3455 3456 void Assembler::emit_data64(jlong data, 3457 RelocationHolder const& rspec, 3458 int format) { 3459 assert(imm_operand == 0, "default format must be immediate in this file"); 3460 assert(imm_operand == format, "must be immediate"); 3461 assert(inst_mark() != NULL, "must be inside InstructionMark"); 3462 // Do not use AbstractAssembler::relocate, which is not intended for 3463 // embedded words. Instead, relocate to the enclosing instruction. 3464 code_section()->relocate(inst_mark(), rspec, format); 3465 #ifdef ASSERT 3466 check_relocation(rspec, format); 3467 #endif 3468 emit_long64(data); 3469 } 3470 3471 int Assembler::prefix_and_encode(int reg_enc, bool byteinst) { 3472 if (reg_enc >= 8) { 3473 prefix(REX_B); 3474 reg_enc -= 8; 3475 } else if (byteinst && reg_enc >= 4) { 3476 prefix(REX); 3477 } 3478 return reg_enc; 3479 } 3480 3481 int Assembler::prefixq_and_encode(int reg_enc) { 3482 if (reg_enc < 8) { 3483 prefix(REX_W); 3484 } else { 3485 prefix(REX_WB); 3486 reg_enc -= 8; 3487 } 3488 return reg_enc; 3489 } 3490 3491 int Assembler::prefix_and_encode(int dst_enc, int src_enc, bool byteinst) { 3492 if (dst_enc < 8) { 3493 if (src_enc >= 8) { 3494 prefix(REX_B); 3495 src_enc -= 8; 3496 } else if (byteinst && src_enc >= 4) { 3497 prefix(REX); 3498 } 3499 } else { 3500 if (src_enc < 8) { 3501 prefix(REX_R); 3502 } else { 3503 prefix(REX_RB); 3504 src_enc -= 8; 3505 } 3506 dst_enc -= 8; 3507 } 3508 return dst_enc << 3 | src_enc; 3509 } 3510 3511 int Assembler::prefixq_and_encode(int dst_enc, int src_enc) { 3512 if (dst_enc < 8) { 3513 if (src_enc < 8) { 3514 prefix(REX_W); 3515 } else { 3516 prefix(REX_WB); 3517 src_enc -= 8; 3518 } 3519 } else { 3520 if (src_enc < 8) { 3521 prefix(REX_WR); 3522 } else { 3523 prefix(REX_WRB); 3524 src_enc -= 8; 3525 } 3526 dst_enc -= 8; 3527 } 3528 return dst_enc << 3 | src_enc; 3529 } 3530 3531 void Assembler::prefix(Register reg) { 3532 if (reg->encoding() >= 8) { 3533 prefix(REX_B); 3534 } 3535 } 3536 3537 void Assembler::prefix(Address adr) { 3538 if (adr.base_needs_rex()) { 3539 if (adr.index_needs_rex()) { 3540 prefix(REX_XB); 3541 } else { 3542 prefix(REX_B); 3543 } 3544 } else { 3545 if (adr.index_needs_rex()) { 3546 prefix(REX_X); 3547 } 3548 } 3549 } 3550 3551 void Assembler::prefixq(Address adr) { 3552 if (adr.base_needs_rex()) { 3553 if (adr.index_needs_rex()) { 3554 prefix(REX_WXB); 3555 } else { 3556 prefix(REX_WB); 3557 } 3558 } else { 3559 if (adr.index_needs_rex()) { 3560 prefix(REX_WX); 3561 } else { 3562 prefix(REX_W); 3563 } 3564 } 3565 } 3566 3567 3568 void Assembler::prefix(Address adr, Register reg, bool byteinst) { 3569 if (reg->encoding() < 8) { 3570 if (adr.base_needs_rex()) { 3571 if (adr.index_needs_rex()) { 3572 prefix(REX_XB); 3573 } else { 3574 prefix(REX_B); 3575 } 3576 } else { 3577 if (adr.index_needs_rex()) { 3578 prefix(REX_X); 3579 } else if (reg->encoding() >= 4 ) { 3580 prefix(REX); 3581 } 3582 } 3583 } else { 3584 if (adr.base_needs_rex()) { 3585 if (adr.index_needs_rex()) { 3586 prefix(REX_RXB); 3587 } else { 3588 prefix(REX_RB); 3589 } 3590 } else { 3591 if (adr.index_needs_rex()) { 3592 prefix(REX_RX); 3593 } else { 3594 prefix(REX_R); 3595 } 3596 } 3597 } 3598 } 3599 3600 void Assembler::prefixq(Address adr, Register src) { 3601 if (src->encoding() < 8) { 3602 if (adr.base_needs_rex()) { 3603 if (adr.index_needs_rex()) { 3604 prefix(REX_WXB); 3605 } else { 3606 prefix(REX_WB); 3607 } 3608 } else { 3609 if (adr.index_needs_rex()) { 3610 prefix(REX_WX); 3611 } else { 3612 prefix(REX_W); 3613 } 3614 } 3615 } else { 3616 if (adr.base_needs_rex()) { 3617 if (adr.index_needs_rex()) { 3618 prefix(REX_WRXB); 3619 } else { 3620 prefix(REX_WRB); 3621 } 3622 } else { 3623 if (adr.index_needs_rex()) { 3624 prefix(REX_WRX); 3625 } else { 3626 prefix(REX_WR); 3627 } 3628 } 3629 } 3630 } 3631 3632 void Assembler::prefix(Address adr, XMMRegister reg) { 3633 if (reg->encoding() < 8) { 3634 if (adr.base_needs_rex()) { 3635 if (adr.index_needs_rex()) { 3636 prefix(REX_XB); 3637 } else { 3638 prefix(REX_B); 3639 } 3640 } else { 3641 if (adr.index_needs_rex()) { 3642 prefix(REX_X); 3643 } 3644 } 3645 } else { 3646 if (adr.base_needs_rex()) { 3647 if (adr.index_needs_rex()) { 3648 prefix(REX_RXB); 3649 } else { 3650 prefix(REX_RB); 3651 } 3652 } else { 3653 if (adr.index_needs_rex()) { 3654 prefix(REX_RX); 3655 } else { 3656 prefix(REX_R); 3657 } 3658 } 3659 } 3660 } 3661 3662 void Assembler::adcq(Register dst, int32_t imm32) { 3663 (void) prefixq_and_encode(dst->encoding()); 3664 emit_arith(0x81, 0xD0, dst, imm32); 3665 } 3666 3667 void Assembler::adcq(Register dst, Address src) { 3668 InstructionMark im(this); 3669 prefixq(src, dst); 3670 emit_byte(0x13); 3671 emit_operand(dst, src); 3672 } 3673 3674 void Assembler::adcq(Register dst, Register src) { 3675 (int) prefixq_and_encode(dst->encoding(), src->encoding()); 3676 emit_arith(0x13, 0xC0, dst, src); 3677 } 3678 3679 void Assembler::addq(Address dst, int32_t imm32) { 3680 InstructionMark im(this); 3681 prefixq(dst); 3682 emit_arith_operand(0x81, rax, dst,imm32); 3683 } 3684 3685 void Assembler::addq(Address dst, Register src) { 3686 InstructionMark im(this); 3687 prefixq(dst, src); 3688 emit_byte(0x01); 3689 emit_operand(src, dst); 3690 } 3691 3692 void Assembler::addq(Register dst, int32_t imm32) { 3693 (void) prefixq_and_encode(dst->encoding()); 3694 emit_arith(0x81, 0xC0, dst, imm32); 3695 } 3696 3697 void Assembler::addq(Register dst, Address src) { 3698 InstructionMark im(this); 3699 prefixq(src, dst); 3700 emit_byte(0x03); 3701 emit_operand(dst, src); 3702 } 3703 3704 void Assembler::addq(Register dst, Register src) { 3705 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 3706 emit_arith(0x03, 0xC0, dst, src); 3707 } 3708 3709 void Assembler::andq(Register dst, int32_t imm32) { 3710 (void) prefixq_and_encode(dst->encoding()); 3711 emit_arith(0x81, 0xE0, dst, imm32); 3712 } 3713 3714 void Assembler::andq(Register dst, Address src) { 3715 InstructionMark im(this); 3716 prefixq(src, dst); 3717 emit_byte(0x23); 3718 emit_operand(dst, src); 3719 } 3720 3721 void Assembler::andq(Register dst, Register src) { 3722 (int) prefixq_and_encode(dst->encoding(), src->encoding()); 3723 emit_arith(0x23, 0xC0, dst, src); 3724 } 3725 3726 void Assembler::bsfq(Register dst, Register src) { 3727 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3728 emit_byte(0x0F); 3729 emit_byte(0xBC); 3730 emit_byte(0xC0 | encode); 3731 } 3732 3733 void Assembler::bsrq(Register dst, Register src) { 3734 assert(!VM_Version::supports_lzcnt(), "encoding is treated as LZCNT"); 3735 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3736 emit_byte(0x0F); 3737 emit_byte(0xBD); 3738 emit_byte(0xC0 | encode); 3739 } 3740 3741 void Assembler::bswapq(Register reg) { 3742 int encode = prefixq_and_encode(reg->encoding()); 3743 emit_byte(0x0F); 3744 emit_byte(0xC8 | encode); 3745 } 3746 3747 void Assembler::cdqq() { 3748 prefix(REX_W); 3749 emit_byte(0x99); 3750 } 3751 3752 void Assembler::clflush(Address adr) { 3753 prefix(adr); 3754 emit_byte(0x0F); 3755 emit_byte(0xAE); 3756 emit_operand(rdi, adr); 3757 } 3758 3759 void Assembler::cmovq(Condition cc, Register dst, Register src) { 3760 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3761 emit_byte(0x0F); 3762 emit_byte(0x40 | cc); 3763 emit_byte(0xC0 | encode); 3764 } 3765 3766 void Assembler::cmovq(Condition cc, Register dst, Address src) { 3767 InstructionMark im(this); 3768 prefixq(src, dst); 3769 emit_byte(0x0F); 3770 emit_byte(0x40 | cc); 3771 emit_operand(dst, src); 3772 } 3773 3774 void Assembler::cmpq(Address dst, int32_t imm32) { 3775 InstructionMark im(this); 3776 prefixq(dst); 3777 emit_byte(0x81); 3778 emit_operand(rdi, dst, 4); 3779 emit_long(imm32); 3780 } 3781 3782 void Assembler::cmpq(Register dst, int32_t imm32) { 3783 (void) prefixq_and_encode(dst->encoding()); 3784 emit_arith(0x81, 0xF8, dst, imm32); 3785 } 3786 3787 void Assembler::cmpq(Address dst, Register src) { 3788 InstructionMark im(this); 3789 prefixq(dst, src); 3790 emit_byte(0x3B); 3791 emit_operand(src, dst); 3792 } 3793 3794 void Assembler::cmpq(Register dst, Register src) { 3795 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 3796 emit_arith(0x3B, 0xC0, dst, src); 3797 } 3798 3799 void Assembler::cmpq(Register dst, Address src) { 3800 InstructionMark im(this); 3801 prefixq(src, dst); 3802 emit_byte(0x3B); 3803 emit_operand(dst, src); 3804 } 3805 3806 void Assembler::cmpxchgq(Register reg, Address adr) { 3807 InstructionMark im(this); 3808 prefixq(adr, reg); 3809 emit_byte(0x0F); 3810 emit_byte(0xB1); 3811 emit_operand(reg, adr); 3812 } 3813 3814 void Assembler::cvtsi2sdq(XMMRegister dst, Register src) { 3815 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 3816 emit_byte(0xF2); 3817 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3818 emit_byte(0x0F); 3819 emit_byte(0x2A); 3820 emit_byte(0xC0 | encode); 3821 } 3822 3823 void Assembler::cvtsi2ssq(XMMRegister dst, Register src) { 3824 NOT_LP64(assert(VM_Version::supports_sse(), "")); 3825 emit_byte(0xF3); 3826 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3827 emit_byte(0x0F); 3828 emit_byte(0x2A); 3829 emit_byte(0xC0 | encode); 3830 } 3831 3832 void Assembler::cvttsd2siq(Register dst, XMMRegister src) { 3833 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 3834 emit_byte(0xF2); 3835 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3836 emit_byte(0x0F); 3837 emit_byte(0x2C); 3838 emit_byte(0xC0 | encode); 3839 } 3840 3841 void Assembler::cvttss2siq(Register dst, XMMRegister src) { 3842 NOT_LP64(assert(VM_Version::supports_sse(), "")); 3843 emit_byte(0xF3); 3844 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3845 emit_byte(0x0F); 3846 emit_byte(0x2C); 3847 emit_byte(0xC0 | encode); 3848 } 3849 3850 void Assembler::decl(Register dst) { 3851 // Don't use it directly. Use MacroAssembler::decrementl() instead. 3852 // Use two-byte form (one-byte form is a REX prefix in 64-bit mode) 3853 int encode = prefix_and_encode(dst->encoding()); 3854 emit_byte(0xFF); 3855 emit_byte(0xC8 | encode); 3856 } 3857 3858 void Assembler::decq(Register dst) { 3859 // Don't use it directly. Use MacroAssembler::decrementq() instead. 3860 // Use two-byte form (one-byte from is a REX prefix in 64-bit mode) 3861 int encode = prefixq_and_encode(dst->encoding()); 3862 emit_byte(0xFF); 3863 emit_byte(0xC8 | encode); 3864 } 3865 3866 void Assembler::decq(Address dst) { 3867 // Don't use it directly. Use MacroAssembler::decrementq() instead. 3868 InstructionMark im(this); 3869 prefixq(dst); 3870 emit_byte(0xFF); 3871 emit_operand(rcx, dst); 3872 } 3873 3874 void Assembler::fxrstor(Address src) { 3875 prefixq(src); 3876 emit_byte(0x0F); 3877 emit_byte(0xAE); 3878 emit_operand(as_Register(1), src); 3879 } 3880 3881 void Assembler::fxsave(Address dst) { 3882 prefixq(dst); 3883 emit_byte(0x0F); 3884 emit_byte(0xAE); 3885 emit_operand(as_Register(0), dst); 3886 } 3887 3888 void Assembler::idivq(Register src) { 3889 int encode = prefixq_and_encode(src->encoding()); 3890 emit_byte(0xF7); 3891 emit_byte(0xF8 | encode); 3892 } 3893 3894 void Assembler::imulq(Register dst, Register src) { 3895 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3896 emit_byte(0x0F); 3897 emit_byte(0xAF); 3898 emit_byte(0xC0 | encode); 3899 } 3900 3901 void Assembler::imulq(Register dst, Register src, int value) { 3902 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3903 if (is8bit(value)) { 3904 emit_byte(0x6B); 3905 emit_byte(0xC0 | encode); 3906 emit_byte(value); 3907 } else { 3908 emit_byte(0x69); 3909 emit_byte(0xC0 | encode); 3910 emit_long(value); 3911 } 3912 } 3913 3914 void Assembler::incl(Register dst) { 3915 // Don't use it directly. Use MacroAssembler::incrementl() instead. 3916 // Use two-byte form (one-byte from is a REX prefix in 64-bit mode) 3917 int encode = prefix_and_encode(dst->encoding()); 3918 emit_byte(0xFF); 3919 emit_byte(0xC0 | encode); 3920 } 3921 3922 void Assembler::incq(Register dst) { 3923 // Don't use it directly. Use MacroAssembler::incrementq() instead. 3924 // Use two-byte form (one-byte from is a REX prefix in 64-bit mode) 3925 int encode = prefixq_and_encode(dst->encoding()); 3926 emit_byte(0xFF); 3927 emit_byte(0xC0 | encode); 3928 } 3929 3930 void Assembler::incq(Address dst) { 3931 // Don't use it directly. Use MacroAssembler::incrementq() instead. 3932 InstructionMark im(this); 3933 prefixq(dst); 3934 emit_byte(0xFF); 3935 emit_operand(rax, dst); 3936 } 3937 3938 void Assembler::lea(Register dst, Address src) { 3939 leaq(dst, src); 3940 } 3941 3942 void Assembler::leaq(Register dst, Address src) { 3943 InstructionMark im(this); 3944 prefixq(src, dst); 3945 emit_byte(0x8D); 3946 emit_operand(dst, src); 3947 } 3948 3949 void Assembler::mov64(Register dst, int64_t imm64) { 3950 InstructionMark im(this); 3951 int encode = prefixq_and_encode(dst->encoding()); 3952 emit_byte(0xB8 | encode); 3953 emit_long64(imm64); 3954 } 3955 3956 void Assembler::mov_literal64(Register dst, intptr_t imm64, RelocationHolder const& rspec) { 3957 InstructionMark im(this); 3958 int encode = prefixq_and_encode(dst->encoding()); 3959 emit_byte(0xB8 | encode); 3960 emit_data64(imm64, rspec); 3961 } 3962 3963 void Assembler::mov_narrow_oop(Register dst, int32_t imm32, RelocationHolder const& rspec) { 3964 InstructionMark im(this); 3965 int encode = prefix_and_encode(dst->encoding()); 3966 emit_byte(0xB8 | encode); 3967 emit_data((int)imm32, rspec, narrow_oop_operand); 3968 } 3969 3970 void Assembler::mov_narrow_oop(Address dst, int32_t imm32, RelocationHolder const& rspec) { 3971 InstructionMark im(this); 3972 prefix(dst); 3973 emit_byte(0xC7); 3974 emit_operand(rax, dst, 4); 3975 emit_data((int)imm32, rspec, narrow_oop_operand); 3976 } 3977 3978 void Assembler::cmp_narrow_oop(Register src1, int32_t imm32, RelocationHolder const& rspec) { 3979 InstructionMark im(this); 3980 int encode = prefix_and_encode(src1->encoding()); 3981 emit_byte(0x81); 3982 emit_byte(0xF8 | encode); 3983 emit_data((int)imm32, rspec, narrow_oop_operand); 3984 } 3985 3986 void Assembler::cmp_narrow_oop(Address src1, int32_t imm32, RelocationHolder const& rspec) { 3987 InstructionMark im(this); 3988 prefix(src1); 3989 emit_byte(0x81); 3990 emit_operand(rax, src1, 4); 3991 emit_data((int)imm32, rspec, narrow_oop_operand); 3992 } 3993 3994 void Assembler::lzcntq(Register dst, Register src) { 3995 assert(VM_Version::supports_lzcnt(), "encoding is treated as BSR"); 3996 emit_byte(0xF3); 3997 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 3998 emit_byte(0x0F); 3999 emit_byte(0xBD); 4000 emit_byte(0xC0 | encode); 4001 } 4002 4003 void Assembler::movdq(XMMRegister dst, Register src) { 4004 // table D-1 says MMX/SSE2 4005 NOT_LP64(assert(VM_Version::supports_sse2() || VM_Version::supports_mmx(), "")); 4006 emit_byte(0x66); 4007 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4008 emit_byte(0x0F); 4009 emit_byte(0x6E); 4010 emit_byte(0xC0 | encode); 4011 } 4012 4013 void Assembler::movdq(Register dst, XMMRegister src) { 4014 // table D-1 says MMX/SSE2 4015 NOT_LP64(assert(VM_Version::supports_sse2() || VM_Version::supports_mmx(), "")); 4016 emit_byte(0x66); 4017 // swap src/dst to get correct prefix 4018 int encode = prefixq_and_encode(src->encoding(), dst->encoding()); 4019 emit_byte(0x0F); 4020 emit_byte(0x7E); 4021 emit_byte(0xC0 | encode); 4022 } 4023 4024 void Assembler::movq(Register dst, Register src) { 4025 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4026 emit_byte(0x8B); 4027 emit_byte(0xC0 | encode); 4028 } 4029 4030 void Assembler::movq(Register dst, Address src) { 4031 InstructionMark im(this); 4032 prefixq(src, dst); 4033 emit_byte(0x8B); 4034 emit_operand(dst, src); 4035 } 4036 4037 void Assembler::movq(Address dst, Register src) { 4038 InstructionMark im(this); 4039 prefixq(dst, src); 4040 emit_byte(0x89); 4041 emit_operand(src, dst); 4042 } 4043 4044 void Assembler::movsbq(Register dst, Address src) { 4045 InstructionMark im(this); 4046 prefixq(src, dst); 4047 emit_byte(0x0F); 4048 emit_byte(0xBE); 4049 emit_operand(dst, src); 4050 } 4051 4052 void Assembler::movsbq(Register dst, Register src) { 4053 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4054 emit_byte(0x0F); 4055 emit_byte(0xBE); 4056 emit_byte(0xC0 | encode); 4057 } 4058 4059 void Assembler::movslq(Register dst, int32_t imm32) { 4060 // dbx shows movslq(rcx, 3) as movq $0x0000000049000000,(%rbx) 4061 // and movslq(r8, 3); as movl $0x0000000048000000,(%rbx) 4062 // as a result we shouldn't use until tested at runtime... 4063 ShouldNotReachHere(); 4064 InstructionMark im(this); 4065 int encode = prefixq_and_encode(dst->encoding()); 4066 emit_byte(0xC7 | encode); 4067 emit_long(imm32); 4068 } 4069 4070 void Assembler::movslq(Address dst, int32_t imm32) { 4071 assert(is_simm32(imm32), "lost bits"); 4072 InstructionMark im(this); 4073 prefixq(dst); 4074 emit_byte(0xC7); 4075 emit_operand(rax, dst, 4); 4076 emit_long(imm32); 4077 } 4078 4079 void Assembler::movslq(Register dst, Address src) { 4080 InstructionMark im(this); 4081 prefixq(src, dst); 4082 emit_byte(0x63); 4083 emit_operand(dst, src); 4084 } 4085 4086 void Assembler::movslq(Register dst, Register src) { 4087 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4088 emit_byte(0x63); 4089 emit_byte(0xC0 | encode); 4090 } 4091 4092 void Assembler::movswq(Register dst, Address src) { 4093 InstructionMark im(this); 4094 prefixq(src, dst); 4095 emit_byte(0x0F); 4096 emit_byte(0xBF); 4097 emit_operand(dst, src); 4098 } 4099 4100 void Assembler::movswq(Register dst, Register src) { 4101 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4102 emit_byte(0x0F); 4103 emit_byte(0xBF); 4104 emit_byte(0xC0 | encode); 4105 } 4106 4107 void Assembler::movzbq(Register dst, Address src) { 4108 InstructionMark im(this); 4109 prefixq(src, dst); 4110 emit_byte(0x0F); 4111 emit_byte(0xB6); 4112 emit_operand(dst, src); 4113 } 4114 4115 void Assembler::movzbq(Register dst, Register src) { 4116 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4117 emit_byte(0x0F); 4118 emit_byte(0xB6); 4119 emit_byte(0xC0 | encode); 4120 } 4121 4122 void Assembler::movzwq(Register dst, Address src) { 4123 InstructionMark im(this); 4124 prefixq(src, dst); 4125 emit_byte(0x0F); 4126 emit_byte(0xB7); 4127 emit_operand(dst, src); 4128 } 4129 4130 void Assembler::movzwq(Register dst, Register src) { 4131 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4132 emit_byte(0x0F); 4133 emit_byte(0xB7); 4134 emit_byte(0xC0 | encode); 4135 } 4136 4137 void Assembler::negq(Register dst) { 4138 int encode = prefixq_and_encode(dst->encoding()); 4139 emit_byte(0xF7); 4140 emit_byte(0xD8 | encode); 4141 } 4142 4143 void Assembler::notq(Register dst) { 4144 int encode = prefixq_and_encode(dst->encoding()); 4145 emit_byte(0xF7); 4146 emit_byte(0xD0 | encode); 4147 } 4148 4149 void Assembler::orq(Address dst, int32_t imm32) { 4150 InstructionMark im(this); 4151 prefixq(dst); 4152 emit_byte(0x81); 4153 emit_operand(rcx, dst, 4); 4154 emit_long(imm32); 4155 } 4156 4157 void Assembler::orq(Register dst, int32_t imm32) { 4158 (void) prefixq_and_encode(dst->encoding()); 4159 emit_arith(0x81, 0xC8, dst, imm32); 4160 } 4161 4162 void Assembler::orq(Register dst, Address src) { 4163 InstructionMark im(this); 4164 prefixq(src, dst); 4165 emit_byte(0x0B); 4166 emit_operand(dst, src); 4167 } 4168 4169 void Assembler::orq(Register dst, Register src) { 4170 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 4171 emit_arith(0x0B, 0xC0, dst, src); 4172 } 4173 4174 void Assembler::popa() { // 64bit 4175 movq(r15, Address(rsp, 0)); 4176 movq(r14, Address(rsp, wordSize)); 4177 movq(r13, Address(rsp, 2 * wordSize)); 4178 movq(r12, Address(rsp, 3 * wordSize)); 4179 movq(r11, Address(rsp, 4 * wordSize)); 4180 movq(r10, Address(rsp, 5 * wordSize)); 4181 movq(r9, Address(rsp, 6 * wordSize)); 4182 movq(r8, Address(rsp, 7 * wordSize)); 4183 movq(rdi, Address(rsp, 8 * wordSize)); 4184 movq(rsi, Address(rsp, 9 * wordSize)); 4185 movq(rbp, Address(rsp, 10 * wordSize)); 4186 // skip rsp 4187 movq(rbx, Address(rsp, 12 * wordSize)); 4188 movq(rdx, Address(rsp, 13 * wordSize)); 4189 movq(rcx, Address(rsp, 14 * wordSize)); 4190 movq(rax, Address(rsp, 15 * wordSize)); 4191 4192 addq(rsp, 16 * wordSize); 4193 } 4194 4195 void Assembler::popcntq(Register dst, Address src) { 4196 assert(VM_Version::supports_popcnt(), "must support"); 4197 InstructionMark im(this); 4198 emit_byte(0xF3); 4199 prefixq(src, dst); 4200 emit_byte(0x0F); 4201 emit_byte(0xB8); 4202 emit_operand(dst, src); 4203 } 4204 4205 void Assembler::popcntq(Register dst, Register src) { 4206 assert(VM_Version::supports_popcnt(), "must support"); 4207 emit_byte(0xF3); 4208 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4209 emit_byte(0x0F); 4210 emit_byte(0xB8); 4211 emit_byte(0xC0 | encode); 4212 } 4213 4214 void Assembler::popq(Address dst) { 4215 InstructionMark im(this); 4216 prefixq(dst); 4217 emit_byte(0x8F); 4218 emit_operand(rax, dst); 4219 } 4220 4221 void Assembler::pusha() { // 64bit 4222 // we have to store original rsp. ABI says that 128 bytes 4223 // below rsp are local scratch. 4224 movq(Address(rsp, -5 * wordSize), rsp); 4225 4226 subq(rsp, 16 * wordSize); 4227 4228 movq(Address(rsp, 15 * wordSize), rax); 4229 movq(Address(rsp, 14 * wordSize), rcx); 4230 movq(Address(rsp, 13 * wordSize), rdx); 4231 movq(Address(rsp, 12 * wordSize), rbx); 4232 // skip rsp 4233 movq(Address(rsp, 10 * wordSize), rbp); 4234 movq(Address(rsp, 9 * wordSize), rsi); 4235 movq(Address(rsp, 8 * wordSize), rdi); 4236 movq(Address(rsp, 7 * wordSize), r8); 4237 movq(Address(rsp, 6 * wordSize), r9); 4238 movq(Address(rsp, 5 * wordSize), r10); 4239 movq(Address(rsp, 4 * wordSize), r11); 4240 movq(Address(rsp, 3 * wordSize), r12); 4241 movq(Address(rsp, 2 * wordSize), r13); 4242 movq(Address(rsp, wordSize), r14); 4243 movq(Address(rsp, 0), r15); 4244 } 4245 4246 void Assembler::pushq(Address src) { 4247 InstructionMark im(this); 4248 prefixq(src); 4249 emit_byte(0xFF); 4250 emit_operand(rsi, src); 4251 } 4252 4253 void Assembler::rclq(Register dst, int imm8) { 4254 assert(isShiftCount(imm8 >> 1), "illegal shift count"); 4255 int encode = prefixq_and_encode(dst->encoding()); 4256 if (imm8 == 1) { 4257 emit_byte(0xD1); 4258 emit_byte(0xD0 | encode); 4259 } else { 4260 emit_byte(0xC1); 4261 emit_byte(0xD0 | encode); 4262 emit_byte(imm8); 4263 } 4264 } 4265 void Assembler::sarq(Register dst, int imm8) { 4266 assert(isShiftCount(imm8 >> 1), "illegal shift count"); 4267 int encode = prefixq_and_encode(dst->encoding()); 4268 if (imm8 == 1) { 4269 emit_byte(0xD1); 4270 emit_byte(0xF8 | encode); 4271 } else { 4272 emit_byte(0xC1); 4273 emit_byte(0xF8 | encode); 4274 emit_byte(imm8); 4275 } 4276 } 4277 4278 void Assembler::sarq(Register dst) { 4279 int encode = prefixq_and_encode(dst->encoding()); 4280 emit_byte(0xD3); 4281 emit_byte(0xF8 | encode); 4282 } 4283 void Assembler::sbbq(Address dst, int32_t imm32) { 4284 InstructionMark im(this); 4285 prefixq(dst); 4286 emit_arith_operand(0x81, rbx, dst, imm32); 4287 } 4288 4289 void Assembler::sbbq(Register dst, int32_t imm32) { 4290 (void) prefixq_and_encode(dst->encoding()); 4291 emit_arith(0x81, 0xD8, dst, imm32); 4292 } 4293 4294 void Assembler::sbbq(Register dst, Address src) { 4295 InstructionMark im(this); 4296 prefixq(src, dst); 4297 emit_byte(0x1B); 4298 emit_operand(dst, src); 4299 } 4300 4301 void Assembler::sbbq(Register dst, Register src) { 4302 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 4303 emit_arith(0x1B, 0xC0, dst, src); 4304 } 4305 4306 void Assembler::shlq(Register dst, int imm8) { 4307 assert(isShiftCount(imm8 >> 1), "illegal shift count"); 4308 int encode = prefixq_and_encode(dst->encoding()); 4309 if (imm8 == 1) { 4310 emit_byte(0xD1); 4311 emit_byte(0xE0 | encode); 4312 } else { 4313 emit_byte(0xC1); 4314 emit_byte(0xE0 | encode); 4315 emit_byte(imm8); 4316 } 4317 } 4318 4319 void Assembler::shlq(Register dst) { 4320 int encode = prefixq_and_encode(dst->encoding()); 4321 emit_byte(0xD3); 4322 emit_byte(0xE0 | encode); 4323 } 4324 4325 void Assembler::shrq(Register dst, int imm8) { 4326 assert(isShiftCount(imm8 >> 1), "illegal shift count"); 4327 int encode = prefixq_and_encode(dst->encoding()); 4328 emit_byte(0xC1); 4329 emit_byte(0xE8 | encode); 4330 emit_byte(imm8); 4331 } 4332 4333 void Assembler::shrq(Register dst) { 4334 int encode = prefixq_and_encode(dst->encoding()); 4335 emit_byte(0xD3); 4336 emit_byte(0xE8 | encode); 4337 } 4338 4339 void Assembler::sqrtsd(XMMRegister dst, Address src) { 4340 NOT_LP64(assert(VM_Version::supports_sse2(), "")); 4341 InstructionMark im(this); 4342 emit_byte(0xF2); 4343 prefix(src, dst); 4344 emit_byte(0x0F); 4345 emit_byte(0x51); 4346 emit_operand(dst, src); 4347 } 4348 4349 void Assembler::subq(Address dst, int32_t imm32) { 4350 InstructionMark im(this); 4351 prefixq(dst); 4352 if (is8bit(imm32)) { 4353 emit_byte(0x83); 4354 emit_operand(rbp, dst, 1); 4355 emit_byte(imm32 & 0xFF); 4356 } else { 4357 emit_byte(0x81); 4358 emit_operand(rbp, dst, 4); 4359 emit_long(imm32); 4360 } 4361 } 4362 4363 void Assembler::subq(Register dst, int32_t imm32) { 4364 (void) prefixq_and_encode(dst->encoding()); 4365 emit_arith(0x81, 0xE8, dst, imm32); 4366 } 4367 4368 void Assembler::subq(Address dst, Register src) { 4369 InstructionMark im(this); 4370 prefixq(dst, src); 4371 emit_byte(0x29); 4372 emit_operand(src, dst); 4373 } 4374 4375 void Assembler::subq(Register dst, Address src) { 4376 InstructionMark im(this); 4377 prefixq(src, dst); 4378 emit_byte(0x2B); 4379 emit_operand(dst, src); 4380 } 4381 4382 void Assembler::subq(Register dst, Register src) { 4383 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 4384 emit_arith(0x2B, 0xC0, dst, src); 4385 } 4386 4387 void Assembler::testq(Register dst, int32_t imm32) { 4388 // not using emit_arith because test 4389 // doesn't support sign-extension of 4390 // 8bit operands 4391 int encode = dst->encoding(); 4392 if (encode == 0) { 4393 prefix(REX_W); 4394 emit_byte(0xA9); 4395 } else { 4396 encode = prefixq_and_encode(encode); 4397 emit_byte(0xF7); 4398 emit_byte(0xC0 | encode); 4399 } 4400 emit_long(imm32); 4401 } 4402 4403 void Assembler::testq(Register dst, Register src) { 4404 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 4405 emit_arith(0x85, 0xC0, dst, src); 4406 } 4407 4408 void Assembler::xaddq(Address dst, Register src) { 4409 InstructionMark im(this); 4410 prefixq(dst, src); 4411 emit_byte(0x0F); 4412 emit_byte(0xC1); 4413 emit_operand(src, dst); 4414 } 4415 4416 void Assembler::xchgq(Register dst, Address src) { 4417 InstructionMark im(this); 4418 prefixq(src, dst); 4419 emit_byte(0x87); 4420 emit_operand(dst, src); 4421 } 4422 4423 void Assembler::xchgq(Register dst, Register src) { 4424 int encode = prefixq_and_encode(dst->encoding(), src->encoding()); 4425 emit_byte(0x87); 4426 emit_byte(0xc0 | encode); 4427 } 4428 4429 void Assembler::xorq(Register dst, Register src) { 4430 (void) prefixq_and_encode(dst->encoding(), src->encoding()); 4431 emit_arith(0x33, 0xC0, dst, src); 4432 } 4433 4434 void Assembler::xorq(Register dst, Address src) { 4435 InstructionMark im(this); 4436 prefixq(src, dst); 4437 emit_byte(0x33); 4438 emit_operand(dst, src); 4439 } 4440 4441 #endif // !LP64 4442 4443 static Assembler::Condition reverse[] = { 4444 Assembler::noOverflow /* overflow = 0x0 */ , 4445 Assembler::overflow /* noOverflow = 0x1 */ , 4446 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ , 4447 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ , 4448 Assembler::notZero /* zero = 0x4, equal = 0x4 */ , 4449 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ , 4450 Assembler::above /* belowEqual = 0x6 */ , 4451 Assembler::belowEqual /* above = 0x7 */ , 4452 Assembler::positive /* negative = 0x8 */ , 4453 Assembler::negative /* positive = 0x9 */ , 4454 Assembler::noParity /* parity = 0xa */ , 4455 Assembler::parity /* noParity = 0xb */ , 4456 Assembler::greaterEqual /* less = 0xc */ , 4457 Assembler::less /* greaterEqual = 0xd */ , 4458 Assembler::greater /* lessEqual = 0xe */ , 4459 Assembler::lessEqual /* greater = 0xf, */ 4460 4461 }; 4462 4463 4464 // Implementation of MacroAssembler 4465 4466 // First all the versions that have distinct versions depending on 32/64 bit 4467 // Unless the difference is trivial (1 line or so). 4468 4469 #ifndef _LP64 4470 4471 // 32bit versions 4472 4473 Address MacroAssembler::as_Address(AddressLiteral adr) { 4474 return Address(adr.target(), adr.rspec()); 4475 } 4476 4477 Address MacroAssembler::as_Address(ArrayAddress adr) { 4478 return Address::make_array(adr); 4479 } 4480 4481 int MacroAssembler::biased_locking_enter(Register lock_reg, 4482 Register obj_reg, 4483 Register swap_reg, 4484 Register tmp_reg, 4485 bool swap_reg_contains_mark, 4486 Label& done, 4487 Label* slow_case, 4488 BiasedLockingCounters* counters) { 4489 assert(UseBiasedLocking, "why call this otherwise?"); 4490 assert(swap_reg == rax, "swap_reg must be rax, for cmpxchg"); 4491 assert_different_registers(lock_reg, obj_reg, swap_reg); 4492 4493 if (PrintBiasedLockingStatistics && counters == NULL) 4494 counters = BiasedLocking::counters(); 4495 4496 bool need_tmp_reg = false; 4497 if (tmp_reg == noreg) { 4498 need_tmp_reg = true; 4499 tmp_reg = lock_reg; 4500 } else { 4501 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); 4502 } 4503 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); 4504 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); 4505 Address klass_addr (obj_reg, oopDesc::klass_offset_in_bytes()); 4506 Address saved_mark_addr(lock_reg, 0); 4507 4508 // Biased locking 4509 // See whether the lock is currently biased toward our thread and 4510 // whether the epoch is still valid 4511 // Note that the runtime guarantees sufficient alignment of JavaThread 4512 // pointers to allow age to be placed into low bits 4513 // First check to see whether biasing is even enabled for this object 4514 Label cas_label; 4515 int null_check_offset = -1; 4516 if (!swap_reg_contains_mark) { 4517 null_check_offset = offset(); 4518 movl(swap_reg, mark_addr); 4519 } 4520 if (need_tmp_reg) { 4521 push(tmp_reg); 4522 } 4523 movl(tmp_reg, swap_reg); 4524 andl(tmp_reg, markOopDesc::biased_lock_mask_in_place); 4525 cmpl(tmp_reg, markOopDesc::biased_lock_pattern); 4526 if (need_tmp_reg) { 4527 pop(tmp_reg); 4528 } 4529 jcc(Assembler::notEqual, cas_label); 4530 // The bias pattern is present in the object's header. Need to check 4531 // whether the bias owner and the epoch are both still current. 4532 // Note that because there is no current thread register on x86 we 4533 // need to store off the mark word we read out of the object to 4534 // avoid reloading it and needing to recheck invariants below. This 4535 // store is unfortunate but it makes the overall code shorter and 4536 // simpler. 4537 movl(saved_mark_addr, swap_reg); 4538 if (need_tmp_reg) { 4539 push(tmp_reg); 4540 } 4541 get_thread(tmp_reg); 4542 xorl(swap_reg, tmp_reg); 4543 if (swap_reg_contains_mark) { 4544 null_check_offset = offset(); 4545 } 4546 movl(tmp_reg, klass_addr); 4547 xorl(swap_reg, Address(tmp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes())); 4548 andl(swap_reg, ~((int) markOopDesc::age_mask_in_place)); 4549 if (need_tmp_reg) { 4550 pop(tmp_reg); 4551 } 4552 if (counters != NULL) { 4553 cond_inc32(Assembler::zero, 4554 ExternalAddress((address)counters->biased_lock_entry_count_addr())); 4555 } 4556 jcc(Assembler::equal, done); 4557 4558 Label try_revoke_bias; 4559 Label try_rebias; 4560 4561 // At this point we know that the header has the bias pattern and 4562 // that we are not the bias owner in the current epoch. We need to 4563 // figure out more details about the state of the header in order to 4564 // know what operations can be legally performed on the object's 4565 // header. 4566 4567 // If the low three bits in the xor result aren't clear, that means 4568 // the prototype header is no longer biased and we have to revoke 4569 // the bias on this object. 4570 testl(swap_reg, markOopDesc::biased_lock_mask_in_place); 4571 jcc(Assembler::notZero, try_revoke_bias); 4572 4573 // Biasing is still enabled for this data type. See whether the 4574 // epoch of the current bias is still valid, meaning that the epoch 4575 // bits of the mark word are equal to the epoch bits of the 4576 // prototype header. (Note that the prototype header's epoch bits 4577 // only change at a safepoint.) If not, attempt to rebias the object 4578 // toward the current thread. Note that we must be absolutely sure 4579 // that the current epoch is invalid in order to do this because 4580 // otherwise the manipulations it performs on the mark word are 4581 // illegal. 4582 testl(swap_reg, markOopDesc::epoch_mask_in_place); 4583 jcc(Assembler::notZero, try_rebias); 4584 4585 // The epoch of the current bias is still valid but we know nothing 4586 // about the owner; it might be set or it might be clear. Try to 4587 // acquire the bias of the object using an atomic operation. If this 4588 // fails we will go in to the runtime to revoke the object's bias. 4589 // Note that we first construct the presumed unbiased header so we 4590 // don't accidentally blow away another thread's valid bias. 4591 movl(swap_reg, saved_mark_addr); 4592 andl(swap_reg, 4593 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); 4594 if (need_tmp_reg) { 4595 push(tmp_reg); 4596 } 4597 get_thread(tmp_reg); 4598 orl(tmp_reg, swap_reg); 4599 if (os::is_MP()) { 4600 lock(); 4601 } 4602 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); 4603 if (need_tmp_reg) { 4604 pop(tmp_reg); 4605 } 4606 // If the biasing toward our thread failed, this means that 4607 // another thread succeeded in biasing it toward itself and we 4608 // need to revoke that bias. The revocation will occur in the 4609 // interpreter runtime in the slow case. 4610 if (counters != NULL) { 4611 cond_inc32(Assembler::zero, 4612 ExternalAddress((address)counters->anonymously_biased_lock_entry_count_addr())); 4613 } 4614 if (slow_case != NULL) { 4615 jcc(Assembler::notZero, *slow_case); 4616 } 4617 jmp(done); 4618 4619 bind(try_rebias); 4620 // At this point we know the epoch has expired, meaning that the 4621 // current "bias owner", if any, is actually invalid. Under these 4622 // circumstances _only_, we are allowed to use the current header's 4623 // value as the comparison value when doing the cas to acquire the 4624 // bias in the current epoch. In other words, we allow transfer of 4625 // the bias from one thread to another directly in this situation. 4626 // 4627 // FIXME: due to a lack of registers we currently blow away the age 4628 // bits in this situation. Should attempt to preserve them. 4629 if (need_tmp_reg) { 4630 push(tmp_reg); 4631 } 4632 get_thread(tmp_reg); 4633 movl(swap_reg, klass_addr); 4634 orl(tmp_reg, Address(swap_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes())); 4635 movl(swap_reg, saved_mark_addr); 4636 if (os::is_MP()) { 4637 lock(); 4638 } 4639 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); 4640 if (need_tmp_reg) { 4641 pop(tmp_reg); 4642 } 4643 // If the biasing toward our thread failed, then another thread 4644 // succeeded in biasing it toward itself and we need to revoke that 4645 // bias. The revocation will occur in the runtime in the slow case. 4646 if (counters != NULL) { 4647 cond_inc32(Assembler::zero, 4648 ExternalAddress((address)counters->rebiased_lock_entry_count_addr())); 4649 } 4650 if (slow_case != NULL) { 4651 jcc(Assembler::notZero, *slow_case); 4652 } 4653 jmp(done); 4654 4655 bind(try_revoke_bias); 4656 // The prototype mark in the klass doesn't have the bias bit set any 4657 // more, indicating that objects of this data type are not supposed 4658 // to be biased any more. We are going to try to reset the mark of 4659 // this object to the prototype value and fall through to the 4660 // CAS-based locking scheme. Note that if our CAS fails, it means 4661 // that another thread raced us for the privilege of revoking the 4662 // bias of this particular object, so it's okay to continue in the 4663 // normal locking code. 4664 // 4665 // FIXME: due to a lack of registers we currently blow away the age 4666 // bits in this situation. Should attempt to preserve them. 4667 movl(swap_reg, saved_mark_addr); 4668 if (need_tmp_reg) { 4669 push(tmp_reg); 4670 } 4671 movl(tmp_reg, klass_addr); 4672 movl(tmp_reg, Address(tmp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes())); 4673 if (os::is_MP()) { 4674 lock(); 4675 } 4676 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); 4677 if (need_tmp_reg) { 4678 pop(tmp_reg); 4679 } 4680 // Fall through to the normal CAS-based lock, because no matter what 4681 // the result of the above CAS, some thread must have succeeded in 4682 // removing the bias bit from the object's header. 4683 if (counters != NULL) { 4684 cond_inc32(Assembler::zero, 4685 ExternalAddress((address)counters->revoked_lock_entry_count_addr())); 4686 } 4687 4688 bind(cas_label); 4689 4690 return null_check_offset; 4691 } 4692 void MacroAssembler::call_VM_leaf_base(address entry_point, 4693 int number_of_arguments) { 4694 call(RuntimeAddress(entry_point)); 4695 increment(rsp, number_of_arguments * wordSize); 4696 } 4697 4698 void MacroAssembler::cmpoop(Address src1, jobject obj) { 4699 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); 4700 } 4701 4702 void MacroAssembler::cmpoop(Register src1, jobject obj) { 4703 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); 4704 } 4705 4706 void MacroAssembler::extend_sign(Register hi, Register lo) { 4707 // According to Intel Doc. AP-526, "Integer Divide", p.18. 4708 if (VM_Version::is_P6() && hi == rdx && lo == rax) { 4709 cdql(); 4710 } else { 4711 movl(hi, lo); 4712 sarl(hi, 31); 4713 } 4714 } 4715 4716 void MacroAssembler::fat_nop() { 4717 // A 5 byte nop that is safe for patching (see patch_verified_entry) 4718 emit_byte(0x26); // es: 4719 emit_byte(0x2e); // cs: 4720 emit_byte(0x64); // fs: 4721 emit_byte(0x65); // gs: 4722 emit_byte(0x90); 4723 } 4724 4725 void MacroAssembler::jC2(Register tmp, Label& L) { 4726 // set parity bit if FPU flag C2 is set (via rax) 4727 save_rax(tmp); 4728 fwait(); fnstsw_ax(); 4729 sahf(); 4730 restore_rax(tmp); 4731 // branch 4732 jcc(Assembler::parity, L); 4733 } 4734 4735 void MacroAssembler::jnC2(Register tmp, Label& L) { 4736 // set parity bit if FPU flag C2 is set (via rax) 4737 save_rax(tmp); 4738 fwait(); fnstsw_ax(); 4739 sahf(); 4740 restore_rax(tmp); 4741 // branch 4742 jcc(Assembler::noParity, L); 4743 } 4744 4745 // 32bit can do a case table jump in one instruction but we no longer allow the base 4746 // to be installed in the Address class 4747 void MacroAssembler::jump(ArrayAddress entry) { 4748 jmp(as_Address(entry)); 4749 } 4750 4751 // Note: y_lo will be destroyed 4752 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { 4753 // Long compare for Java (semantics as described in JVM spec.) 4754 Label high, low, done; 4755 4756 cmpl(x_hi, y_hi); 4757 jcc(Assembler::less, low); 4758 jcc(Assembler::greater, high); 4759 // x_hi is the return register 4760 xorl(x_hi, x_hi); 4761 cmpl(x_lo, y_lo); 4762 jcc(Assembler::below, low); 4763 jcc(Assembler::equal, done); 4764 4765 bind(high); 4766 xorl(x_hi, x_hi); 4767 increment(x_hi); 4768 jmp(done); 4769 4770 bind(low); 4771 xorl(x_hi, x_hi); 4772 decrementl(x_hi); 4773 4774 bind(done); 4775 } 4776 4777 void MacroAssembler::lea(Register dst, AddressLiteral src) { 4778 mov_literal32(dst, (int32_t)src.target(), src.rspec()); 4779 } 4780 4781 void MacroAssembler::lea(Address dst, AddressLiteral adr) { 4782 // leal(dst, as_Address(adr)); 4783 // see note in movl as to why we must use a move 4784 mov_literal32(dst, (int32_t) adr.target(), adr.rspec()); 4785 } 4786 4787 void MacroAssembler::leave() { 4788 mov(rsp, rbp); 4789 pop(rbp); 4790 } 4791 4792 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) { 4793 // Multiplication of two Java long values stored on the stack 4794 // as illustrated below. Result is in rdx:rax. 4795 // 4796 // rsp ---> [ ?? ] \ \ 4797 // .... | y_rsp_offset | 4798 // [ y_lo ] / (in bytes) | x_rsp_offset 4799 // [ y_hi ] | (in bytes) 4800 // .... | 4801 // [ x_lo ] / 4802 // [ x_hi ] 4803 // .... 4804 // 4805 // Basic idea: lo(result) = lo(x_lo * y_lo) 4806 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi) 4807 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset); 4808 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset); 4809 Label quick; 4810 // load x_hi, y_hi and check if quick 4811 // multiplication is possible 4812 movl(rbx, x_hi); 4813 movl(rcx, y_hi); 4814 movl(rax, rbx); 4815 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0 4816 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply 4817 // do full multiplication 4818 // 1st step 4819 mull(y_lo); // x_hi * y_lo 4820 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx, 4821 // 2nd step 4822 movl(rax, x_lo); 4823 mull(rcx); // x_lo * y_hi 4824 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx, 4825 // 3rd step 4826 bind(quick); // note: rbx, = 0 if quick multiply! 4827 movl(rax, x_lo); 4828 mull(y_lo); // x_lo * y_lo 4829 addl(rdx, rbx); // correct hi(x_lo * y_lo) 4830 } 4831 4832 void MacroAssembler::lneg(Register hi, Register lo) { 4833 negl(lo); 4834 adcl(hi, 0); 4835 negl(hi); 4836 } 4837 4838 void MacroAssembler::lshl(Register hi, Register lo) { 4839 // Java shift left long support (semantics as described in JVM spec., p.305) 4840 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n)) 4841 // shift value is in rcx ! 4842 assert(hi != rcx, "must not use rcx"); 4843 assert(lo != rcx, "must not use rcx"); 4844 const Register s = rcx; // shift count 4845 const int n = BitsPerWord; 4846 Label L; 4847 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) 4848 cmpl(s, n); // if (s < n) 4849 jcc(Assembler::less, L); // else (s >= n) 4850 movl(hi, lo); // x := x << n 4851 xorl(lo, lo); 4852 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! 4853 bind(L); // s (mod n) < n 4854 shldl(hi, lo); // x := x << s 4855 shll(lo); 4856 } 4857 4858 4859 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) { 4860 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310) 4861 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n)) 4862 assert(hi != rcx, "must not use rcx"); 4863 assert(lo != rcx, "must not use rcx"); 4864 const Register s = rcx; // shift count 4865 const int n = BitsPerWord; 4866 Label L; 4867 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) 4868 cmpl(s, n); // if (s < n) 4869 jcc(Assembler::less, L); // else (s >= n) 4870 movl(lo, hi); // x := x >> n 4871 if (sign_extension) sarl(hi, 31); 4872 else xorl(hi, hi); 4873 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! 4874 bind(L); // s (mod n) < n 4875 shrdl(lo, hi); // x := x >> s 4876 if (sign_extension) sarl(hi); 4877 else shrl(hi); 4878 } 4879 4880 void MacroAssembler::movoop(Register dst, jobject obj) { 4881 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); 4882 } 4883 4884 void MacroAssembler::movoop(Address dst, jobject obj) { 4885 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); 4886 } 4887 4888 void MacroAssembler::movptr(Register dst, AddressLiteral src) { 4889 if (src.is_lval()) { 4890 mov_literal32(dst, (intptr_t)src.target(), src.rspec()); 4891 } else { 4892 movl(dst, as_Address(src)); 4893 } 4894 } 4895 4896 void MacroAssembler::movptr(ArrayAddress dst, Register src) { 4897 movl(as_Address(dst), src); 4898 } 4899 4900 void MacroAssembler::movptr(Register dst, ArrayAddress src) { 4901 movl(dst, as_Address(src)); 4902 } 4903 4904 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 4905 void MacroAssembler::movptr(Address dst, intptr_t src) { 4906 movl(dst, src); 4907 } 4908 4909 4910 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) { 4911 movsd(dst, as_Address(src)); 4912 } 4913 4914 void MacroAssembler::pop_callee_saved_registers() { 4915 pop(rcx); 4916 pop(rdx); 4917 pop(rdi); 4918 pop(rsi); 4919 } 4920 4921 void MacroAssembler::pop_fTOS() { 4922 fld_d(Address(rsp, 0)); 4923 addl(rsp, 2 * wordSize); 4924 } 4925 4926 void MacroAssembler::push_callee_saved_registers() { 4927 push(rsi); 4928 push(rdi); 4929 push(rdx); 4930 push(rcx); 4931 } 4932 4933 void MacroAssembler::push_fTOS() { 4934 subl(rsp, 2 * wordSize); 4935 fstp_d(Address(rsp, 0)); 4936 } 4937 4938 4939 void MacroAssembler::pushoop(jobject obj) { 4940 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate()); 4941 } 4942 4943 4944 void MacroAssembler::pushptr(AddressLiteral src) { 4945 if (src.is_lval()) { 4946 push_literal32((int32_t)src.target(), src.rspec()); 4947 } else { 4948 pushl(as_Address(src)); 4949 } 4950 } 4951 4952 void MacroAssembler::set_word_if_not_zero(Register dst) { 4953 xorl(dst, dst); 4954 set_byte_if_not_zero(dst); 4955 } 4956 4957 static void pass_arg0(MacroAssembler* masm, Register arg) { 4958 masm->push(arg); 4959 } 4960 4961 static void pass_arg1(MacroAssembler* masm, Register arg) { 4962 masm->push(arg); 4963 } 4964 4965 static void pass_arg2(MacroAssembler* masm, Register arg) { 4966 masm->push(arg); 4967 } 4968 4969 static void pass_arg3(MacroAssembler* masm, Register arg) { 4970 masm->push(arg); 4971 } 4972 4973 #ifndef PRODUCT 4974 extern "C" void findpc(intptr_t x); 4975 #endif 4976 4977 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) { 4978 // In order to get locks to work, we need to fake a in_VM state 4979 JavaThread* thread = JavaThread::current(); 4980 JavaThreadState saved_state = thread->thread_state(); 4981 thread->set_thread_state(_thread_in_vm); 4982 if (ShowMessageBoxOnError) { 4983 JavaThread* thread = JavaThread::current(); 4984 JavaThreadState saved_state = thread->thread_state(); 4985 thread->set_thread_state(_thread_in_vm); 4986 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 4987 ttyLocker ttyl; 4988 BytecodeCounter::print(); 4989 } 4990 // To see where a verify_oop failed, get $ebx+40/X for this frame. 4991 // This is the value of eip which points to where verify_oop will return. 4992 if (os::message_box(msg, "Execution stopped, print registers?")) { 4993 ttyLocker ttyl; 4994 tty->print_cr("eip = 0x%08x", eip); 4995 #ifndef PRODUCT 4996 tty->cr(); 4997 findpc(eip); 4998 tty->cr(); 4999 #endif 5000 tty->print_cr("rax, = 0x%08x", rax); 5001 tty->print_cr("rbx, = 0x%08x", rbx); 5002 tty->print_cr("rcx = 0x%08x", rcx); 5003 tty->print_cr("rdx = 0x%08x", rdx); 5004 tty->print_cr("rdi = 0x%08x", rdi); 5005 tty->print_cr("rsi = 0x%08x", rsi); 5006 tty->print_cr("rbp, = 0x%08x", rbp); 5007 tty->print_cr("rsp = 0x%08x", rsp); 5008 BREAKPOINT; 5009 } 5010 } else { 5011 ttyLocker ttyl; 5012 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); 5013 assert(false, "DEBUG MESSAGE"); 5014 } 5015 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); 5016 } 5017 5018 void MacroAssembler::stop(const char* msg) { 5019 ExternalAddress message((address)msg); 5020 // push address of message 5021 pushptr(message.addr()); 5022 { Label L; call(L, relocInfo::none); bind(L); } // push eip 5023 pusha(); // push registers 5024 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); 5025 hlt(); 5026 } 5027 5028 void MacroAssembler::warn(const char* msg) { 5029 push_CPU_state(); 5030 5031 ExternalAddress message((address) msg); 5032 // push address of message 5033 pushptr(message.addr()); 5034 5035 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning))); 5036 addl(rsp, wordSize); // discard argument 5037 pop_CPU_state(); 5038 } 5039 5040 #else // _LP64 5041 5042 // 64 bit versions 5043 5044 Address MacroAssembler::as_Address(AddressLiteral adr) { 5045 // amd64 always does this as a pc-rel 5046 // we can be absolute or disp based on the instruction type 5047 // jmp/call are displacements others are absolute 5048 assert(!adr.is_lval(), "must be rval"); 5049 assert(reachable(adr), "must be"); 5050 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc()); 5051 5052 } 5053 5054 Address MacroAssembler::as_Address(ArrayAddress adr) { 5055 AddressLiteral base = adr.base(); 5056 lea(rscratch1, base); 5057 Address index = adr.index(); 5058 assert(index._disp == 0, "must not have disp"); // maybe it can? 5059 Address array(rscratch1, index._index, index._scale, index._disp); 5060 return array; 5061 } 5062 5063 int MacroAssembler::biased_locking_enter(Register lock_reg, 5064 Register obj_reg, 5065 Register swap_reg, 5066 Register tmp_reg, 5067 bool swap_reg_contains_mark, 5068 Label& done, 5069 Label* slow_case, 5070 BiasedLockingCounters* counters) { 5071 assert(UseBiasedLocking, "why call this otherwise?"); 5072 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq"); 5073 assert(tmp_reg != noreg, "tmp_reg must be supplied"); 5074 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); 5075 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); 5076 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); 5077 Address saved_mark_addr(lock_reg, 0); 5078 5079 if (PrintBiasedLockingStatistics && counters == NULL) 5080 counters = BiasedLocking::counters(); 5081 5082 // Biased locking 5083 // See whether the lock is currently biased toward our thread and 5084 // whether the epoch is still valid 5085 // Note that the runtime guarantees sufficient alignment of JavaThread 5086 // pointers to allow age to be placed into low bits 5087 // First check to see whether biasing is even enabled for this object 5088 Label cas_label; 5089 int null_check_offset = -1; 5090 if (!swap_reg_contains_mark) { 5091 null_check_offset = offset(); 5092 movq(swap_reg, mark_addr); 5093 } 5094 movq(tmp_reg, swap_reg); 5095 andq(tmp_reg, markOopDesc::biased_lock_mask_in_place); 5096 cmpq(tmp_reg, markOopDesc::biased_lock_pattern); 5097 jcc(Assembler::notEqual, cas_label); 5098 // The bias pattern is present in the object's header. Need to check 5099 // whether the bias owner and the epoch are both still current. 5100 load_prototype_header(tmp_reg, obj_reg); 5101 orq(tmp_reg, r15_thread); 5102 xorq(tmp_reg, swap_reg); 5103 andq(tmp_reg, ~((int) markOopDesc::age_mask_in_place)); 5104 if (counters != NULL) { 5105 cond_inc32(Assembler::zero, 5106 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); 5107 } 5108 jcc(Assembler::equal, done); 5109 5110 Label try_revoke_bias; 5111 Label try_rebias; 5112 5113 // At this point we know that the header has the bias pattern and 5114 // that we are not the bias owner in the current epoch. We need to 5115 // figure out more details about the state of the header in order to 5116 // know what operations can be legally performed on the object's 5117 // header. 5118 5119 // If the low three bits in the xor result aren't clear, that means 5120 // the prototype header is no longer biased and we have to revoke 5121 // the bias on this object. 5122 testq(tmp_reg, markOopDesc::biased_lock_mask_in_place); 5123 jcc(Assembler::notZero, try_revoke_bias); 5124 5125 // Biasing is still enabled for this data type. See whether the 5126 // epoch of the current bias is still valid, meaning that the epoch 5127 // bits of the mark word are equal to the epoch bits of the 5128 // prototype header. (Note that the prototype header's epoch bits 5129 // only change at a safepoint.) If not, attempt to rebias the object 5130 // toward the current thread. Note that we must be absolutely sure 5131 // that the current epoch is invalid in order to do this because 5132 // otherwise the manipulations it performs on the mark word are 5133 // illegal. 5134 testq(tmp_reg, markOopDesc::epoch_mask_in_place); 5135 jcc(Assembler::notZero, try_rebias); 5136 5137 // The epoch of the current bias is still valid but we know nothing 5138 // about the owner; it might be set or it might be clear. Try to 5139 // acquire the bias of the object using an atomic operation. If this 5140 // fails we will go in to the runtime to revoke the object's bias. 5141 // Note that we first construct the presumed unbiased header so we 5142 // don't accidentally blow away another thread's valid bias. 5143 andq(swap_reg, 5144 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); 5145 movq(tmp_reg, swap_reg); 5146 orq(tmp_reg, r15_thread); 5147 if (os::is_MP()) { 5148 lock(); 5149 } 5150 cmpxchgq(tmp_reg, Address(obj_reg, 0)); 5151 // If the biasing toward our thread failed, this means that 5152 // another thread succeeded in biasing it toward itself and we 5153 // need to revoke that bias. The revocation will occur in the 5154 // interpreter runtime in the slow case. 5155 if (counters != NULL) { 5156 cond_inc32(Assembler::zero, 5157 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); 5158 } 5159 if (slow_case != NULL) { 5160 jcc(Assembler::notZero, *slow_case); 5161 } 5162 jmp(done); 5163 5164 bind(try_rebias); 5165 // At this point we know the epoch has expired, meaning that the 5166 // current "bias owner", if any, is actually invalid. Under these 5167 // circumstances _only_, we are allowed to use the current header's 5168 // value as the comparison value when doing the cas to acquire the 5169 // bias in the current epoch. In other words, we allow transfer of 5170 // the bias from one thread to another directly in this situation. 5171 // 5172 // FIXME: due to a lack of registers we currently blow away the age 5173 // bits in this situation. Should attempt to preserve them. 5174 load_prototype_header(tmp_reg, obj_reg); 5175 orq(tmp_reg, r15_thread); 5176 if (os::is_MP()) { 5177 lock(); 5178 } 5179 cmpxchgq(tmp_reg, Address(obj_reg, 0)); 5180 // If the biasing toward our thread failed, then another thread 5181 // succeeded in biasing it toward itself and we need to revoke that 5182 // bias. The revocation will occur in the runtime in the slow case. 5183 if (counters != NULL) { 5184 cond_inc32(Assembler::zero, 5185 ExternalAddress((address) counters->rebiased_lock_entry_count_addr())); 5186 } 5187 if (slow_case != NULL) { 5188 jcc(Assembler::notZero, *slow_case); 5189 } 5190 jmp(done); 5191 5192 bind(try_revoke_bias); 5193 // The prototype mark in the klass doesn't have the bias bit set any 5194 // more, indicating that objects of this data type are not supposed 5195 // to be biased any more. We are going to try to reset the mark of 5196 // this object to the prototype value and fall through to the 5197 // CAS-based locking scheme. Note that if our CAS fails, it means 5198 // that another thread raced us for the privilege of revoking the 5199 // bias of this particular object, so it's okay to continue in the 5200 // normal locking code. 5201 // 5202 // FIXME: due to a lack of registers we currently blow away the age 5203 // bits in this situation. Should attempt to preserve them. 5204 load_prototype_header(tmp_reg, obj_reg); 5205 if (os::is_MP()) { 5206 lock(); 5207 } 5208 cmpxchgq(tmp_reg, Address(obj_reg, 0)); 5209 // Fall through to the normal CAS-based lock, because no matter what 5210 // the result of the above CAS, some thread must have succeeded in 5211 // removing the bias bit from the object's header. 5212 if (counters != NULL) { 5213 cond_inc32(Assembler::zero, 5214 ExternalAddress((address) counters->revoked_lock_entry_count_addr())); 5215 } 5216 5217 bind(cas_label); 5218 5219 return null_check_offset; 5220 } 5221 5222 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) { 5223 Label L, E; 5224 5225 #ifdef _WIN64 5226 // Windows always allocates space for it's register args 5227 assert(num_args <= 4, "only register arguments supported"); 5228 subq(rsp, frame::arg_reg_save_area_bytes); 5229 #endif 5230 5231 // Align stack if necessary 5232 testl(rsp, 15); 5233 jcc(Assembler::zero, L); 5234 5235 subq(rsp, 8); 5236 { 5237 call(RuntimeAddress(entry_point)); 5238 } 5239 addq(rsp, 8); 5240 jmp(E); 5241 5242 bind(L); 5243 { 5244 call(RuntimeAddress(entry_point)); 5245 } 5246 5247 bind(E); 5248 5249 #ifdef _WIN64 5250 // restore stack pointer 5251 addq(rsp, frame::arg_reg_save_area_bytes); 5252 #endif 5253 5254 } 5255 5256 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) { 5257 assert(!src2.is_lval(), "should use cmpptr"); 5258 5259 if (reachable(src2)) { 5260 cmpq(src1, as_Address(src2)); 5261 } else { 5262 lea(rscratch1, src2); 5263 Assembler::cmpq(src1, Address(rscratch1, 0)); 5264 } 5265 } 5266 5267 int MacroAssembler::corrected_idivq(Register reg) { 5268 // Full implementation of Java ldiv and lrem; checks for special 5269 // case as described in JVM spec., p.243 & p.271. The function 5270 // returns the (pc) offset of the idivl instruction - may be needed 5271 // for implicit exceptions. 5272 // 5273 // normal case special case 5274 // 5275 // input : rax: dividend min_long 5276 // reg: divisor (may not be eax/edx) -1 5277 // 5278 // output: rax: quotient (= rax idiv reg) min_long 5279 // rdx: remainder (= rax irem reg) 0 5280 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register"); 5281 static const int64_t min_long = 0x8000000000000000; 5282 Label normal_case, special_case; 5283 5284 // check for special case 5285 cmp64(rax, ExternalAddress((address) &min_long)); 5286 jcc(Assembler::notEqual, normal_case); 5287 xorl(rdx, rdx); // prepare rdx for possible special case (where 5288 // remainder = 0) 5289 cmpq(reg, -1); 5290 jcc(Assembler::equal, special_case); 5291 5292 // handle normal case 5293 bind(normal_case); 5294 cdqq(); 5295 int idivq_offset = offset(); 5296 idivq(reg); 5297 5298 // normal and special case exit 5299 bind(special_case); 5300 5301 return idivq_offset; 5302 } 5303 5304 void MacroAssembler::decrementq(Register reg, int value) { 5305 if (value == min_jint) { subq(reg, value); return; } 5306 if (value < 0) { incrementq(reg, -value); return; } 5307 if (value == 0) { ; return; } 5308 if (value == 1 && UseIncDec) { decq(reg) ; return; } 5309 /* else */ { subq(reg, value) ; return; } 5310 } 5311 5312 void MacroAssembler::decrementq(Address dst, int value) { 5313 if (value == min_jint) { subq(dst, value); return; } 5314 if (value < 0) { incrementq(dst, -value); return; } 5315 if (value == 0) { ; return; } 5316 if (value == 1 && UseIncDec) { decq(dst) ; return; } 5317 /* else */ { subq(dst, value) ; return; } 5318 } 5319 5320 void MacroAssembler::fat_nop() { 5321 // A 5 byte nop that is safe for patching (see patch_verified_entry) 5322 // Recommened sequence from 'Software Optimization Guide for the AMD 5323 // Hammer Processor' 5324 emit_byte(0x66); 5325 emit_byte(0x66); 5326 emit_byte(0x90); 5327 emit_byte(0x66); 5328 emit_byte(0x90); 5329 } 5330 5331 void MacroAssembler::incrementq(Register reg, int value) { 5332 if (value == min_jint) { addq(reg, value); return; } 5333 if (value < 0) { decrementq(reg, -value); return; } 5334 if (value == 0) { ; return; } 5335 if (value == 1 && UseIncDec) { incq(reg) ; return; } 5336 /* else */ { addq(reg, value) ; return; } 5337 } 5338 5339 void MacroAssembler::incrementq(Address dst, int value) { 5340 if (value == min_jint) { addq(dst, value); return; } 5341 if (value < 0) { decrementq(dst, -value); return; } 5342 if (value == 0) { ; return; } 5343 if (value == 1 && UseIncDec) { incq(dst) ; return; } 5344 /* else */ { addq(dst, value) ; return; } 5345 } 5346 5347 // 32bit can do a case table jump in one instruction but we no longer allow the base 5348 // to be installed in the Address class 5349 void MacroAssembler::jump(ArrayAddress entry) { 5350 lea(rscratch1, entry.base()); 5351 Address dispatch = entry.index(); 5352 assert(dispatch._base == noreg, "must be"); 5353 dispatch._base = rscratch1; 5354 jmp(dispatch); 5355 } 5356 5357 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { 5358 ShouldNotReachHere(); // 64bit doesn't use two regs 5359 cmpq(x_lo, y_lo); 5360 } 5361 5362 void MacroAssembler::lea(Register dst, AddressLiteral src) { 5363 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); 5364 } 5365 5366 void MacroAssembler::lea(Address dst, AddressLiteral adr) { 5367 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec()); 5368 movptr(dst, rscratch1); 5369 } 5370 5371 void MacroAssembler::leave() { 5372 // %%% is this really better? Why not on 32bit too? 5373 emit_byte(0xC9); // LEAVE 5374 } 5375 5376 void MacroAssembler::lneg(Register hi, Register lo) { 5377 ShouldNotReachHere(); // 64bit doesn't use two regs 5378 negq(lo); 5379 } 5380 5381 void MacroAssembler::movoop(Register dst, jobject obj) { 5382 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate()); 5383 } 5384 5385 void MacroAssembler::movoop(Address dst, jobject obj) { 5386 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate()); 5387 movq(dst, rscratch1); 5388 } 5389 5390 void MacroAssembler::movptr(Register dst, AddressLiteral src) { 5391 if (src.is_lval()) { 5392 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); 5393 } else { 5394 if (reachable(src)) { 5395 movq(dst, as_Address(src)); 5396 } else { 5397 lea(rscratch1, src); 5398 movq(dst, Address(rscratch1,0)); 5399 } 5400 } 5401 } 5402 5403 void MacroAssembler::movptr(ArrayAddress dst, Register src) { 5404 movq(as_Address(dst), src); 5405 } 5406 5407 void MacroAssembler::movptr(Register dst, ArrayAddress src) { 5408 movq(dst, as_Address(src)); 5409 } 5410 5411 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 5412 void MacroAssembler::movptr(Address dst, intptr_t src) { 5413 mov64(rscratch1, src); 5414 movq(dst, rscratch1); 5415 } 5416 5417 // These are mostly for initializing NULL 5418 void MacroAssembler::movptr(Address dst, int32_t src) { 5419 movslq(dst, src); 5420 } 5421 5422 void MacroAssembler::movptr(Register dst, int32_t src) { 5423 mov64(dst, (intptr_t)src); 5424 } 5425 5426 void MacroAssembler::pushoop(jobject obj) { 5427 movoop(rscratch1, obj); 5428 push(rscratch1); 5429 } 5430 5431 void MacroAssembler::pushptr(AddressLiteral src) { 5432 lea(rscratch1, src); 5433 if (src.is_lval()) { 5434 push(rscratch1); 5435 } else { 5436 pushq(Address(rscratch1, 0)); 5437 } 5438 } 5439 5440 void MacroAssembler::reset_last_Java_frame(bool clear_fp, 5441 bool clear_pc) { 5442 // we must set sp to zero to clear frame 5443 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); 5444 // must clear fp, so that compiled frames are not confused; it is 5445 // possible that we need it only for debugging 5446 if (clear_fp) { 5447 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); 5448 } 5449 5450 if (clear_pc) { 5451 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); 5452 } 5453 } 5454 5455 void MacroAssembler::set_last_Java_frame(Register last_java_sp, 5456 Register last_java_fp, 5457 address last_java_pc) { 5458 // determine last_java_sp register 5459 if (!last_java_sp->is_valid()) { 5460 last_java_sp = rsp; 5461 } 5462 5463 // last_java_fp is optional 5464 if (last_java_fp->is_valid()) { 5465 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), 5466 last_java_fp); 5467 } 5468 5469 // last_java_pc is optional 5470 if (last_java_pc != NULL) { 5471 Address java_pc(r15_thread, 5472 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); 5473 lea(rscratch1, InternalAddress(last_java_pc)); 5474 movptr(java_pc, rscratch1); 5475 } 5476 5477 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp); 5478 } 5479 5480 static void pass_arg0(MacroAssembler* masm, Register arg) { 5481 if (c_rarg0 != arg ) { 5482 masm->mov(c_rarg0, arg); 5483 } 5484 } 5485 5486 static void pass_arg1(MacroAssembler* masm, Register arg) { 5487 if (c_rarg1 != arg ) { 5488 masm->mov(c_rarg1, arg); 5489 } 5490 } 5491 5492 static void pass_arg2(MacroAssembler* masm, Register arg) { 5493 if (c_rarg2 != arg ) { 5494 masm->mov(c_rarg2, arg); 5495 } 5496 } 5497 5498 static void pass_arg3(MacroAssembler* masm, Register arg) { 5499 if (c_rarg3 != arg ) { 5500 masm->mov(c_rarg3, arg); 5501 } 5502 } 5503 5504 void MacroAssembler::stop(const char* msg) { 5505 address rip = pc(); 5506 pusha(); // get regs on stack 5507 lea(c_rarg0, ExternalAddress((address) msg)); 5508 lea(c_rarg1, InternalAddress(rip)); 5509 movq(c_rarg2, rsp); // pass pointer to regs array 5510 andq(rsp, -16); // align stack as required by ABI 5511 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); 5512 hlt(); 5513 } 5514 5515 void MacroAssembler::warn(const char* msg) { 5516 push(r12); 5517 movq(r12, rsp); 5518 andq(rsp, -16); // align stack as required by push_CPU_state and call 5519 5520 push_CPU_state(); // keeps alignment at 16 bytes 5521 lea(c_rarg0, ExternalAddress((address) msg)); 5522 call_VM_leaf(CAST_FROM_FN_PTR(address, warning), c_rarg0); 5523 pop_CPU_state(); 5524 5525 movq(rsp, r12); 5526 pop(r12); 5527 } 5528 5529 #ifndef PRODUCT 5530 extern "C" void findpc(intptr_t x); 5531 #endif 5532 5533 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) { 5534 // In order to get locks to work, we need to fake a in_VM state 5535 if (ShowMessageBoxOnError ) { 5536 JavaThread* thread = JavaThread::current(); 5537 JavaThreadState saved_state = thread->thread_state(); 5538 thread->set_thread_state(_thread_in_vm); 5539 #ifndef PRODUCT 5540 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 5541 ttyLocker ttyl; 5542 BytecodeCounter::print(); 5543 } 5544 #endif 5545 // To see where a verify_oop failed, get $ebx+40/X for this frame. 5546 // XXX correct this offset for amd64 5547 // This is the value of eip which points to where verify_oop will return. 5548 if (os::message_box(msg, "Execution stopped, print registers?")) { 5549 ttyLocker ttyl; 5550 tty->print_cr("rip = 0x%016lx", pc); 5551 #ifndef PRODUCT 5552 tty->cr(); 5553 findpc(pc); 5554 tty->cr(); 5555 #endif 5556 tty->print_cr("rax = 0x%016lx", regs[15]); 5557 tty->print_cr("rbx = 0x%016lx", regs[12]); 5558 tty->print_cr("rcx = 0x%016lx", regs[14]); 5559 tty->print_cr("rdx = 0x%016lx", regs[13]); 5560 tty->print_cr("rdi = 0x%016lx", regs[8]); 5561 tty->print_cr("rsi = 0x%016lx", regs[9]); 5562 tty->print_cr("rbp = 0x%016lx", regs[10]); 5563 tty->print_cr("rsp = 0x%016lx", regs[11]); 5564 tty->print_cr("r8 = 0x%016lx", regs[7]); 5565 tty->print_cr("r9 = 0x%016lx", regs[6]); 5566 tty->print_cr("r10 = 0x%016lx", regs[5]); 5567 tty->print_cr("r11 = 0x%016lx", regs[4]); 5568 tty->print_cr("r12 = 0x%016lx", regs[3]); 5569 tty->print_cr("r13 = 0x%016lx", regs[2]); 5570 tty->print_cr("r14 = 0x%016lx", regs[1]); 5571 tty->print_cr("r15 = 0x%016lx", regs[0]); 5572 BREAKPOINT; 5573 } 5574 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); 5575 } else { 5576 ttyLocker ttyl; 5577 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", 5578 msg); 5579 } 5580 } 5581 5582 #endif // _LP64 5583 5584 // Now versions that are common to 32/64 bit 5585 5586 void MacroAssembler::addptr(Register dst, int32_t imm32) { 5587 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32)); 5588 } 5589 5590 void MacroAssembler::addptr(Register dst, Register src) { 5591 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); 5592 } 5593 5594 void MacroAssembler::addptr(Address dst, Register src) { 5595 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); 5596 } 5597 5598 void MacroAssembler::align(int modulus) { 5599 if (offset() % modulus != 0) { 5600 nop(modulus - (offset() % modulus)); 5601 } 5602 } 5603 5604 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) { 5605 if (reachable(src)) { 5606 andpd(dst, as_Address(src)); 5607 } else { 5608 lea(rscratch1, src); 5609 andpd(dst, Address(rscratch1, 0)); 5610 } 5611 } 5612 5613 void MacroAssembler::andptr(Register dst, int32_t imm32) { 5614 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32)); 5615 } 5616 5617 void MacroAssembler::atomic_incl(AddressLiteral counter_addr) { 5618 pushf(); 5619 if (os::is_MP()) 5620 lock(); 5621 incrementl(counter_addr); 5622 popf(); 5623 } 5624 5625 // Writes to stack successive pages until offset reached to check for 5626 // stack overflow + shadow pages. This clobbers tmp. 5627 void MacroAssembler::bang_stack_size(Register size, Register tmp) { 5628 movptr(tmp, rsp); 5629 // Bang stack for total size given plus shadow page size. 5630 // Bang one page at a time because large size can bang beyond yellow and 5631 // red zones. 5632 Label loop; 5633 bind(loop); 5634 movl(Address(tmp, (-os::vm_page_size())), size ); 5635 subptr(tmp, os::vm_page_size()); 5636 subl(size, os::vm_page_size()); 5637 jcc(Assembler::greater, loop); 5638 5639 // Bang down shadow pages too. 5640 // The -1 because we already subtracted 1 page. 5641 for (int i = 0; i< StackShadowPages-1; i++) { 5642 // this could be any sized move but this is can be a debugging crumb 5643 // so the bigger the better. 5644 movptr(Address(tmp, (-i*os::vm_page_size())), size ); 5645 } 5646 } 5647 5648 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) { 5649 assert(UseBiasedLocking, "why call this otherwise?"); 5650 5651 // Check for biased locking unlock case, which is a no-op 5652 // Note: we do not have to check the thread ID for two reasons. 5653 // First, the interpreter checks for IllegalMonitorStateException at 5654 // a higher level. Second, if the bias was revoked while we held the 5655 // lock, the object could not be rebiased toward another thread, so 5656 // the bias bit would be clear. 5657 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 5658 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place); 5659 cmpptr(temp_reg, markOopDesc::biased_lock_pattern); 5660 jcc(Assembler::equal, done); 5661 } 5662 5663 void MacroAssembler::c2bool(Register x) { 5664 // implements x == 0 ? 0 : 1 5665 // note: must only look at least-significant byte of x 5666 // since C-style booleans are stored in one byte 5667 // only! (was bug) 5668 andl(x, 0xFF); 5669 setb(Assembler::notZero, x); 5670 } 5671 5672 // Wouldn't need if AddressLiteral version had new name 5673 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) { 5674 Assembler::call(L, rtype); 5675 } 5676 5677 void MacroAssembler::call(Register entry) { 5678 Assembler::call(entry); 5679 } 5680 5681 void MacroAssembler::call(AddressLiteral entry) { 5682 if (reachable(entry)) { 5683 Assembler::call_literal(entry.target(), entry.rspec()); 5684 } else { 5685 lea(rscratch1, entry); 5686 Assembler::call(rscratch1); 5687 } 5688 } 5689 5690 // Implementation of call_VM versions 5691 5692 void MacroAssembler::call_VM(Register oop_result, 5693 address entry_point, 5694 bool check_exceptions) { 5695 Label C, E; 5696 call(C, relocInfo::none); 5697 jmp(E); 5698 5699 bind(C); 5700 call_VM_helper(oop_result, entry_point, 0, check_exceptions); 5701 ret(0); 5702 5703 bind(E); 5704 } 5705 5706 void MacroAssembler::call_VM(Register oop_result, 5707 address entry_point, 5708 Register arg_1, 5709 bool check_exceptions) { 5710 Label C, E; 5711 call(C, relocInfo::none); 5712 jmp(E); 5713 5714 bind(C); 5715 pass_arg1(this, arg_1); 5716 call_VM_helper(oop_result, entry_point, 1, check_exceptions); 5717 ret(0); 5718 5719 bind(E); 5720 } 5721 5722 void MacroAssembler::call_VM(Register oop_result, 5723 address entry_point, 5724 Register arg_1, 5725 Register arg_2, 5726 bool check_exceptions) { 5727 Label C, E; 5728 call(C, relocInfo::none); 5729 jmp(E); 5730 5731 bind(C); 5732 5733 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 5734 5735 pass_arg2(this, arg_2); 5736 pass_arg1(this, arg_1); 5737 call_VM_helper(oop_result, entry_point, 2, check_exceptions); 5738 ret(0); 5739 5740 bind(E); 5741 } 5742 5743 void MacroAssembler::call_VM(Register oop_result, 5744 address entry_point, 5745 Register arg_1, 5746 Register arg_2, 5747 Register arg_3, 5748 bool check_exceptions) { 5749 Label C, E; 5750 call(C, relocInfo::none); 5751 jmp(E); 5752 5753 bind(C); 5754 5755 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 5756 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 5757 pass_arg3(this, arg_3); 5758 5759 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 5760 pass_arg2(this, arg_2); 5761 5762 pass_arg1(this, arg_1); 5763 call_VM_helper(oop_result, entry_point, 3, check_exceptions); 5764 ret(0); 5765 5766 bind(E); 5767 } 5768 5769 void MacroAssembler::call_VM(Register oop_result, 5770 Register last_java_sp, 5771 address entry_point, 5772 int number_of_arguments, 5773 bool check_exceptions) { 5774 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); 5775 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 5776 } 5777 5778 void MacroAssembler::call_VM(Register oop_result, 5779 Register last_java_sp, 5780 address entry_point, 5781 Register arg_1, 5782 bool check_exceptions) { 5783 pass_arg1(this, arg_1); 5784 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); 5785 } 5786 5787 void MacroAssembler::call_VM(Register oop_result, 5788 Register last_java_sp, 5789 address entry_point, 5790 Register arg_1, 5791 Register arg_2, 5792 bool check_exceptions) { 5793 5794 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 5795 pass_arg2(this, arg_2); 5796 pass_arg1(this, arg_1); 5797 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); 5798 } 5799 5800 void MacroAssembler::call_VM(Register oop_result, 5801 Register last_java_sp, 5802 address entry_point, 5803 Register arg_1, 5804 Register arg_2, 5805 Register arg_3, 5806 bool check_exceptions) { 5807 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 5808 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 5809 pass_arg3(this, arg_3); 5810 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 5811 pass_arg2(this, arg_2); 5812 pass_arg1(this, arg_1); 5813 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); 5814 } 5815 5816 void MacroAssembler::call_VM_base(Register oop_result, 5817 Register java_thread, 5818 Register last_java_sp, 5819 address entry_point, 5820 int number_of_arguments, 5821 bool check_exceptions) { 5822 // determine java_thread register 5823 if (!java_thread->is_valid()) { 5824 #ifdef _LP64 5825 java_thread = r15_thread; 5826 #else 5827 java_thread = rdi; 5828 get_thread(java_thread); 5829 #endif // LP64 5830 } 5831 // determine last_java_sp register 5832 if (!last_java_sp->is_valid()) { 5833 last_java_sp = rsp; 5834 } 5835 // debugging support 5836 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); 5837 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register")); 5838 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result"); 5839 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp"); 5840 5841 // push java thread (becomes first argument of C function) 5842 5843 NOT_LP64(push(java_thread); number_of_arguments++); 5844 LP64_ONLY(mov(c_rarg0, r15_thread)); 5845 5846 // set last Java frame before call 5847 assert(last_java_sp != rbp, "can't use ebp/rbp"); 5848 5849 // Only interpreter should have to set fp 5850 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL); 5851 5852 // do the call, remove parameters 5853 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 5854 5855 // restore the thread (cannot use the pushed argument since arguments 5856 // may be overwritten by C code generated by an optimizing compiler); 5857 // however can use the register value directly if it is callee saved. 5858 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) { 5859 // rdi & rsi (also r15) are callee saved -> nothing to do 5860 #ifdef ASSERT 5861 guarantee(java_thread != rax, "change this code"); 5862 push(rax); 5863 { Label L; 5864 get_thread(rax); 5865 cmpptr(java_thread, rax); 5866 jcc(Assembler::equal, L); 5867 stop("MacroAssembler::call_VM_base: rdi not callee saved?"); 5868 bind(L); 5869 } 5870 pop(rax); 5871 #endif 5872 } else { 5873 get_thread(java_thread); 5874 } 5875 // reset last Java frame 5876 // Only interpreter should have to clear fp 5877 reset_last_Java_frame(java_thread, true, false); 5878 5879 #ifndef CC_INTERP 5880 // C++ interp handles this in the interpreter 5881 check_and_handle_popframe(java_thread); 5882 check_and_handle_earlyret(java_thread); 5883 #endif /* CC_INTERP */ 5884 5885 if (check_exceptions) { 5886 // check for pending exceptions (java_thread is set upon return) 5887 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 5888 #ifndef _LP64 5889 jump_cc(Assembler::notEqual, 5890 RuntimeAddress(StubRoutines::forward_exception_entry())); 5891 #else 5892 // This used to conditionally jump to forward_exception however it is 5893 // possible if we relocate that the branch will not reach. So we must jump 5894 // around so we can always reach 5895 5896 Label ok; 5897 jcc(Assembler::equal, ok); 5898 jump(RuntimeAddress(StubRoutines::forward_exception_entry())); 5899 bind(ok); 5900 #endif // LP64 5901 } 5902 5903 // get oop result if there is one and reset the value in the thread 5904 if (oop_result->is_valid()) { 5905 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset())); 5906 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD); 5907 verify_oop(oop_result, "broken oop in call_VM_base"); 5908 } 5909 } 5910 5911 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { 5912 5913 // Calculate the value for last_Java_sp 5914 // somewhat subtle. call_VM does an intermediate call 5915 // which places a return address on the stack just under the 5916 // stack pointer as the user finsihed with it. This allows 5917 // use to retrieve last_Java_pc from last_Java_sp[-1]. 5918 // On 32bit we then have to push additional args on the stack to accomplish 5919 // the actual requested call. On 64bit call_VM only can use register args 5920 // so the only extra space is the return address that call_VM created. 5921 // This hopefully explains the calculations here. 5922 5923 #ifdef _LP64 5924 // We've pushed one address, correct last_Java_sp 5925 lea(rax, Address(rsp, wordSize)); 5926 #else 5927 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize)); 5928 #endif // LP64 5929 5930 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions); 5931 5932 } 5933 5934 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) { 5935 call_VM_leaf_base(entry_point, number_of_arguments); 5936 } 5937 5938 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) { 5939 pass_arg0(this, arg_0); 5940 call_VM_leaf(entry_point, 1); 5941 } 5942 5943 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { 5944 5945 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 5946 pass_arg1(this, arg_1); 5947 pass_arg0(this, arg_0); 5948 call_VM_leaf(entry_point, 2); 5949 } 5950 5951 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { 5952 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); 5953 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 5954 pass_arg2(this, arg_2); 5955 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 5956 pass_arg1(this, arg_1); 5957 pass_arg0(this, arg_0); 5958 call_VM_leaf(entry_point, 3); 5959 } 5960 5961 void MacroAssembler::check_and_handle_earlyret(Register java_thread) { 5962 } 5963 5964 void MacroAssembler::check_and_handle_popframe(Register java_thread) { 5965 } 5966 5967 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) { 5968 if (reachable(src1)) { 5969 cmpl(as_Address(src1), imm); 5970 } else { 5971 lea(rscratch1, src1); 5972 cmpl(Address(rscratch1, 0), imm); 5973 } 5974 } 5975 5976 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) { 5977 assert(!src2.is_lval(), "use cmpptr"); 5978 if (reachable(src2)) { 5979 cmpl(src1, as_Address(src2)); 5980 } else { 5981 lea(rscratch1, src2); 5982 cmpl(src1, Address(rscratch1, 0)); 5983 } 5984 } 5985 5986 void MacroAssembler::cmp32(Register src1, int32_t imm) { 5987 Assembler::cmpl(src1, imm); 5988 } 5989 5990 void MacroAssembler::cmp32(Register src1, Address src2) { 5991 Assembler::cmpl(src1, src2); 5992 } 5993 5994 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { 5995 ucomisd(opr1, opr2); 5996 5997 Label L; 5998 if (unordered_is_less) { 5999 movl(dst, -1); 6000 jcc(Assembler::parity, L); 6001 jcc(Assembler::below , L); 6002 movl(dst, 0); 6003 jcc(Assembler::equal , L); 6004 increment(dst); 6005 } else { // unordered is greater 6006 movl(dst, 1); 6007 jcc(Assembler::parity, L); 6008 jcc(Assembler::above , L); 6009 movl(dst, 0); 6010 jcc(Assembler::equal , L); 6011 decrementl(dst); 6012 } 6013 bind(L); 6014 } 6015 6016 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { 6017 ucomiss(opr1, opr2); 6018 6019 Label L; 6020 if (unordered_is_less) { 6021 movl(dst, -1); 6022 jcc(Assembler::parity, L); 6023 jcc(Assembler::below , L); 6024 movl(dst, 0); 6025 jcc(Assembler::equal , L); 6026 increment(dst); 6027 } else { // unordered is greater 6028 movl(dst, 1); 6029 jcc(Assembler::parity, L); 6030 jcc(Assembler::above , L); 6031 movl(dst, 0); 6032 jcc(Assembler::equal , L); 6033 decrementl(dst); 6034 } 6035 bind(L); 6036 } 6037 6038 6039 void MacroAssembler::cmp8(AddressLiteral src1, int imm) { 6040 if (reachable(src1)) { 6041 cmpb(as_Address(src1), imm); 6042 } else { 6043 lea(rscratch1, src1); 6044 cmpb(Address(rscratch1, 0), imm); 6045 } 6046 } 6047 6048 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) { 6049 #ifdef _LP64 6050 if (src2.is_lval()) { 6051 movptr(rscratch1, src2); 6052 Assembler::cmpq(src1, rscratch1); 6053 } else if (reachable(src2)) { 6054 cmpq(src1, as_Address(src2)); 6055 } else { 6056 lea(rscratch1, src2); 6057 Assembler::cmpq(src1, Address(rscratch1, 0)); 6058 } 6059 #else 6060 if (src2.is_lval()) { 6061 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); 6062 } else { 6063 cmpl(src1, as_Address(src2)); 6064 } 6065 #endif // _LP64 6066 } 6067 6068 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) { 6069 assert(src2.is_lval(), "not a mem-mem compare"); 6070 #ifdef _LP64 6071 // moves src2's literal address 6072 movptr(rscratch1, src2); 6073 Assembler::cmpq(src1, rscratch1); 6074 #else 6075 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); 6076 #endif // _LP64 6077 } 6078 6079 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) { 6080 if (reachable(adr)) { 6081 if (os::is_MP()) 6082 lock(); 6083 cmpxchgptr(reg, as_Address(adr)); 6084 } else { 6085 lea(rscratch1, adr); 6086 if (os::is_MP()) 6087 lock(); 6088 cmpxchgptr(reg, Address(rscratch1, 0)); 6089 } 6090 } 6091 6092 void MacroAssembler::cmpxchgptr(Register reg, Address adr) { 6093 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr)); 6094 } 6095 6096 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) { 6097 if (reachable(src)) { 6098 comisd(dst, as_Address(src)); 6099 } else { 6100 lea(rscratch1, src); 6101 comisd(dst, Address(rscratch1, 0)); 6102 } 6103 } 6104 6105 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) { 6106 if (reachable(src)) { 6107 comiss(dst, as_Address(src)); 6108 } else { 6109 lea(rscratch1, src); 6110 comiss(dst, Address(rscratch1, 0)); 6111 } 6112 } 6113 6114 6115 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) { 6116 Condition negated_cond = negate_condition(cond); 6117 Label L; 6118 jcc(negated_cond, L); 6119 atomic_incl(counter_addr); 6120 bind(L); 6121 } 6122 6123 int MacroAssembler::corrected_idivl(Register reg) { 6124 // Full implementation of Java idiv and irem; checks for 6125 // special case as described in JVM spec., p.243 & p.271. 6126 // The function returns the (pc) offset of the idivl 6127 // instruction - may be needed for implicit exceptions. 6128 // 6129 // normal case special case 6130 // 6131 // input : rax,: dividend min_int 6132 // reg: divisor (may not be rax,/rdx) -1 6133 // 6134 // output: rax,: quotient (= rax, idiv reg) min_int 6135 // rdx: remainder (= rax, irem reg) 0 6136 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register"); 6137 const int min_int = 0x80000000; 6138 Label normal_case, special_case; 6139 6140 // check for special case 6141 cmpl(rax, min_int); 6142 jcc(Assembler::notEqual, normal_case); 6143 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0) 6144 cmpl(reg, -1); 6145 jcc(Assembler::equal, special_case); 6146 6147 // handle normal case 6148 bind(normal_case); 6149 cdql(); 6150 int idivl_offset = offset(); 6151 idivl(reg); 6152 6153 // normal and special case exit 6154 bind(special_case); 6155 6156 return idivl_offset; 6157 } 6158 6159 6160 6161 void MacroAssembler::decrementl(Register reg, int value) { 6162 if (value == min_jint) {subl(reg, value) ; return; } 6163 if (value < 0) { incrementl(reg, -value); return; } 6164 if (value == 0) { ; return; } 6165 if (value == 1 && UseIncDec) { decl(reg) ; return; } 6166 /* else */ { subl(reg, value) ; return; } 6167 } 6168 6169 void MacroAssembler::decrementl(Address dst, int value) { 6170 if (value == min_jint) {subl(dst, value) ; return; } 6171 if (value < 0) { incrementl(dst, -value); return; } 6172 if (value == 0) { ; return; } 6173 if (value == 1 && UseIncDec) { decl(dst) ; return; } 6174 /* else */ { subl(dst, value) ; return; } 6175 } 6176 6177 void MacroAssembler::division_with_shift (Register reg, int shift_value) { 6178 assert (shift_value > 0, "illegal shift value"); 6179 Label _is_positive; 6180 testl (reg, reg); 6181 jcc (Assembler::positive, _is_positive); 6182 int offset = (1 << shift_value) - 1 ; 6183 6184 if (offset == 1) { 6185 incrementl(reg); 6186 } else { 6187 addl(reg, offset); 6188 } 6189 6190 bind (_is_positive); 6191 sarl(reg, shift_value); 6192 } 6193 6194 // !defined(COMPILER2) is because of stupid core builds 6195 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) 6196 void MacroAssembler::empty_FPU_stack() { 6197 if (VM_Version::supports_mmx()) { 6198 emms(); 6199 } else { 6200 for (int i = 8; i-- > 0; ) ffree(i); 6201 } 6202 } 6203 #endif // !LP64 || C1 || !C2 6204 6205 6206 // Defines obj, preserves var_size_in_bytes 6207 void MacroAssembler::eden_allocate(Register obj, 6208 Register var_size_in_bytes, 6209 int con_size_in_bytes, 6210 Register t1, 6211 Label& slow_case) { 6212 assert(obj == rax, "obj must be in rax, for cmpxchg"); 6213 assert_different_registers(obj, var_size_in_bytes, t1); 6214 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { 6215 jmp(slow_case); 6216 } else { 6217 Register end = t1; 6218 Label retry; 6219 bind(retry); 6220 ExternalAddress heap_top((address) Universe::heap()->top_addr()); 6221 movptr(obj, heap_top); 6222 if (var_size_in_bytes == noreg) { 6223 lea(end, Address(obj, con_size_in_bytes)); 6224 } else { 6225 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); 6226 } 6227 // if end < obj then we wrapped around => object too long => slow case 6228 cmpptr(end, obj); 6229 jcc(Assembler::below, slow_case); 6230 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr())); 6231 jcc(Assembler::above, slow_case); 6232 // Compare obj with the top addr, and if still equal, store the new top addr in 6233 // end at the address of the top addr pointer. Sets ZF if was equal, and clears 6234 // it otherwise. Use lock prefix for atomicity on MPs. 6235 locked_cmpxchgptr(end, heap_top); 6236 jcc(Assembler::notEqual, retry); 6237 } 6238 } 6239 6240 void MacroAssembler::enter() { 6241 push(rbp); 6242 mov(rbp, rsp); 6243 } 6244 6245 void MacroAssembler::fcmp(Register tmp) { 6246 fcmp(tmp, 1, true, true); 6247 } 6248 6249 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) { 6250 assert(!pop_right || pop_left, "usage error"); 6251 if (VM_Version::supports_cmov()) { 6252 assert(tmp == noreg, "unneeded temp"); 6253 if (pop_left) { 6254 fucomip(index); 6255 } else { 6256 fucomi(index); 6257 } 6258 if (pop_right) { 6259 fpop(); 6260 } 6261 } else { 6262 assert(tmp != noreg, "need temp"); 6263 if (pop_left) { 6264 if (pop_right) { 6265 fcompp(); 6266 } else { 6267 fcomp(index); 6268 } 6269 } else { 6270 fcom(index); 6271 } 6272 // convert FPU condition into eflags condition via rax, 6273 save_rax(tmp); 6274 fwait(); fnstsw_ax(); 6275 sahf(); 6276 restore_rax(tmp); 6277 } 6278 // condition codes set as follows: 6279 // 6280 // CF (corresponds to C0) if x < y 6281 // PF (corresponds to C2) if unordered 6282 // ZF (corresponds to C3) if x = y 6283 } 6284 6285 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) { 6286 fcmp2int(dst, unordered_is_less, 1, true, true); 6287 } 6288 6289 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) { 6290 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right); 6291 Label L; 6292 if (unordered_is_less) { 6293 movl(dst, -1); 6294 jcc(Assembler::parity, L); 6295 jcc(Assembler::below , L); 6296 movl(dst, 0); 6297 jcc(Assembler::equal , L); 6298 increment(dst); 6299 } else { // unordered is greater 6300 movl(dst, 1); 6301 jcc(Assembler::parity, L); 6302 jcc(Assembler::above , L); 6303 movl(dst, 0); 6304 jcc(Assembler::equal , L); 6305 decrementl(dst); 6306 } 6307 bind(L); 6308 } 6309 6310 void MacroAssembler::fld_d(AddressLiteral src) { 6311 fld_d(as_Address(src)); 6312 } 6313 6314 void MacroAssembler::fld_s(AddressLiteral src) { 6315 fld_s(as_Address(src)); 6316 } 6317 6318 void MacroAssembler::fld_x(AddressLiteral src) { 6319 Assembler::fld_x(as_Address(src)); 6320 } 6321 6322 void MacroAssembler::fldcw(AddressLiteral src) { 6323 Assembler::fldcw(as_Address(src)); 6324 } 6325 6326 void MacroAssembler::fpop() { 6327 ffree(); 6328 fincstp(); 6329 } 6330 6331 void MacroAssembler::fremr(Register tmp) { 6332 save_rax(tmp); 6333 { Label L; 6334 bind(L); 6335 fprem(); 6336 fwait(); fnstsw_ax(); 6337 #ifdef _LP64 6338 testl(rax, 0x400); 6339 jcc(Assembler::notEqual, L); 6340 #else 6341 sahf(); 6342 jcc(Assembler::parity, L); 6343 #endif // _LP64 6344 } 6345 restore_rax(tmp); 6346 // Result is in ST0. 6347 // Note: fxch & fpop to get rid of ST1 6348 // (otherwise FPU stack could overflow eventually) 6349 fxch(1); 6350 fpop(); 6351 } 6352 6353 6354 void MacroAssembler::incrementl(AddressLiteral dst) { 6355 if (reachable(dst)) { 6356 incrementl(as_Address(dst)); 6357 } else { 6358 lea(rscratch1, dst); 6359 incrementl(Address(rscratch1, 0)); 6360 } 6361 } 6362 6363 void MacroAssembler::incrementl(ArrayAddress dst) { 6364 incrementl(as_Address(dst)); 6365 } 6366 6367 void MacroAssembler::incrementl(Register reg, int value) { 6368 if (value == min_jint) {addl(reg, value) ; return; } 6369 if (value < 0) { decrementl(reg, -value); return; } 6370 if (value == 0) { ; return; } 6371 if (value == 1 && UseIncDec) { incl(reg) ; return; } 6372 /* else */ { addl(reg, value) ; return; } 6373 } 6374 6375 void MacroAssembler::incrementl(Address dst, int value) { 6376 if (value == min_jint) {addl(dst, value) ; return; } 6377 if (value < 0) { decrementl(dst, -value); return; } 6378 if (value == 0) { ; return; } 6379 if (value == 1 && UseIncDec) { incl(dst) ; return; } 6380 /* else */ { addl(dst, value) ; return; } 6381 } 6382 6383 void MacroAssembler::jump(AddressLiteral dst) { 6384 if (reachable(dst)) { 6385 jmp_literal(dst.target(), dst.rspec()); 6386 } else { 6387 lea(rscratch1, dst); 6388 jmp(rscratch1); 6389 } 6390 } 6391 6392 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) { 6393 if (reachable(dst)) { 6394 InstructionMark im(this); 6395 relocate(dst.reloc()); 6396 const int short_size = 2; 6397 const int long_size = 6; 6398 int offs = (intptr_t)dst.target() - ((intptr_t)_code_pos); 6399 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) { 6400 // 0111 tttn #8-bit disp 6401 emit_byte(0x70 | cc); 6402 emit_byte((offs - short_size) & 0xFF); 6403 } else { 6404 // 0000 1111 1000 tttn #32-bit disp 6405 emit_byte(0x0F); 6406 emit_byte(0x80 | cc); 6407 emit_long(offs - long_size); 6408 } 6409 } else { 6410 #ifdef ASSERT 6411 warning("reversing conditional branch"); 6412 #endif /* ASSERT */ 6413 Label skip; 6414 jccb(reverse[cc], skip); 6415 lea(rscratch1, dst); 6416 Assembler::jmp(rscratch1); 6417 bind(skip); 6418 } 6419 } 6420 6421 void MacroAssembler::ldmxcsr(AddressLiteral src) { 6422 if (reachable(src)) { 6423 Assembler::ldmxcsr(as_Address(src)); 6424 } else { 6425 lea(rscratch1, src); 6426 Assembler::ldmxcsr(Address(rscratch1, 0)); 6427 } 6428 } 6429 6430 int MacroAssembler::load_signed_byte(Register dst, Address src) { 6431 int off; 6432 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 6433 off = offset(); 6434 movsbl(dst, src); // movsxb 6435 } else { 6436 off = load_unsigned_byte(dst, src); 6437 shll(dst, 24); 6438 sarl(dst, 24); 6439 } 6440 return off; 6441 } 6442 6443 // Note: load_signed_short used to be called load_signed_word. 6444 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler 6445 // manual, which means 16 bits, that usage is found nowhere in HotSpot code. 6446 // The term "word" in HotSpot means a 32- or 64-bit machine word. 6447 int MacroAssembler::load_signed_short(Register dst, Address src) { 6448 int off; 6449 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 6450 // This is dubious to me since it seems safe to do a signed 16 => 64 bit 6451 // version but this is what 64bit has always done. This seems to imply 6452 // that users are only using 32bits worth. 6453 off = offset(); 6454 movswl(dst, src); // movsxw 6455 } else { 6456 off = load_unsigned_short(dst, src); 6457 shll(dst, 16); 6458 sarl(dst, 16); 6459 } 6460 return off; 6461 } 6462 6463 int MacroAssembler::load_unsigned_byte(Register dst, Address src) { 6464 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, 6465 // and "3.9 Partial Register Penalties", p. 22). 6466 int off; 6467 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) { 6468 off = offset(); 6469 movzbl(dst, src); // movzxb 6470 } else { 6471 xorl(dst, dst); 6472 off = offset(); 6473 movb(dst, src); 6474 } 6475 return off; 6476 } 6477 6478 // Note: load_unsigned_short used to be called load_unsigned_word. 6479 int MacroAssembler::load_unsigned_short(Register dst, Address src) { 6480 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, 6481 // and "3.9 Partial Register Penalties", p. 22). 6482 int off; 6483 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) { 6484 off = offset(); 6485 movzwl(dst, src); // movzxw 6486 } else { 6487 xorl(dst, dst); 6488 off = offset(); 6489 movw(dst, src); 6490 } 6491 return off; 6492 } 6493 6494 void MacroAssembler::load_sized_value(Register dst, Address src, 6495 int size_in_bytes, bool is_signed) { 6496 switch (size_in_bytes ^ (is_signed ? -1 : 0)) { 6497 #ifndef _LP64 6498 // For case 8, caller is responsible for manually loading 6499 // the second word into another register. 6500 case ~8: // fall through: 6501 case 8: movl( dst, src ); break; 6502 #else 6503 case ~8: // fall through: 6504 case 8: movq( dst, src ); break; 6505 #endif 6506 case ~4: // fall through: 6507 case 4: movl( dst, src ); break; 6508 case ~2: load_signed_short( dst, src ); break; 6509 case 2: load_unsigned_short( dst, src ); break; 6510 case ~1: load_signed_byte( dst, src ); break; 6511 case 1: load_unsigned_byte( dst, src ); break; 6512 default: ShouldNotReachHere(); 6513 } 6514 } 6515 6516 void MacroAssembler::mov32(AddressLiteral dst, Register src) { 6517 if (reachable(dst)) { 6518 movl(as_Address(dst), src); 6519 } else { 6520 lea(rscratch1, dst); 6521 movl(Address(rscratch1, 0), src); 6522 } 6523 } 6524 6525 void MacroAssembler::mov32(Register dst, AddressLiteral src) { 6526 if (reachable(src)) { 6527 movl(dst, as_Address(src)); 6528 } else { 6529 lea(rscratch1, src); 6530 movl(dst, Address(rscratch1, 0)); 6531 } 6532 } 6533 6534 // C++ bool manipulation 6535 6536 void MacroAssembler::movbool(Register dst, Address src) { 6537 if(sizeof(bool) == 1) 6538 movb(dst, src); 6539 else if(sizeof(bool) == 2) 6540 movw(dst, src); 6541 else if(sizeof(bool) == 4) 6542 movl(dst, src); 6543 else 6544 // unsupported 6545 ShouldNotReachHere(); 6546 } 6547 6548 void MacroAssembler::movbool(Address dst, bool boolconst) { 6549 if(sizeof(bool) == 1) 6550 movb(dst, (int) boolconst); 6551 else if(sizeof(bool) == 2) 6552 movw(dst, (int) boolconst); 6553 else if(sizeof(bool) == 4) 6554 movl(dst, (int) boolconst); 6555 else 6556 // unsupported 6557 ShouldNotReachHere(); 6558 } 6559 6560 void MacroAssembler::movbool(Address dst, Register src) { 6561 if(sizeof(bool) == 1) 6562 movb(dst, src); 6563 else if(sizeof(bool) == 2) 6564 movw(dst, src); 6565 else if(sizeof(bool) == 4) 6566 movl(dst, src); 6567 else 6568 // unsupported 6569 ShouldNotReachHere(); 6570 } 6571 6572 void MacroAssembler::movbyte(ArrayAddress dst, int src) { 6573 movb(as_Address(dst), src); 6574 } 6575 6576 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) { 6577 if (reachable(src)) { 6578 if (UseXmmLoadAndClearUpper) { 6579 movsd (dst, as_Address(src)); 6580 } else { 6581 movlpd(dst, as_Address(src)); 6582 } 6583 } else { 6584 lea(rscratch1, src); 6585 if (UseXmmLoadAndClearUpper) { 6586 movsd (dst, Address(rscratch1, 0)); 6587 } else { 6588 movlpd(dst, Address(rscratch1, 0)); 6589 } 6590 } 6591 } 6592 6593 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) { 6594 if (reachable(src)) { 6595 movss(dst, as_Address(src)); 6596 } else { 6597 lea(rscratch1, src); 6598 movss(dst, Address(rscratch1, 0)); 6599 } 6600 } 6601 6602 void MacroAssembler::movptr(Register dst, Register src) { 6603 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 6604 } 6605 6606 void MacroAssembler::movptr(Register dst, Address src) { 6607 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 6608 } 6609 6610 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 6611 void MacroAssembler::movptr(Register dst, intptr_t src) { 6612 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src)); 6613 } 6614 6615 void MacroAssembler::movptr(Address dst, Register src) { 6616 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 6617 } 6618 6619 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) { 6620 if (reachable(src)) { 6621 movss(dst, as_Address(src)); 6622 } else { 6623 lea(rscratch1, src); 6624 movss(dst, Address(rscratch1, 0)); 6625 } 6626 } 6627 6628 void MacroAssembler::null_check(Register reg, int offset) { 6629 if (needs_explicit_null_check(offset)) { 6630 // provoke OS NULL exception if reg = NULL by 6631 // accessing M[reg] w/o changing any (non-CC) registers 6632 // NOTE: cmpl is plenty here to provoke a segv 6633 cmpptr(rax, Address(reg, 0)); 6634 // Note: should probably use testl(rax, Address(reg, 0)); 6635 // may be shorter code (however, this version of 6636 // testl needs to be implemented first) 6637 } else { 6638 // nothing to do, (later) access of M[reg + offset] 6639 // will provoke OS NULL exception if reg = NULL 6640 } 6641 } 6642 6643 void MacroAssembler::os_breakpoint() { 6644 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability 6645 // (e.g., MSVC can't call ps() otherwise) 6646 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); 6647 } 6648 6649 void MacroAssembler::pop_CPU_state() { 6650 pop_FPU_state(); 6651 pop_IU_state(); 6652 } 6653 6654 void MacroAssembler::pop_FPU_state() { 6655 NOT_LP64(frstor(Address(rsp, 0));) 6656 LP64_ONLY(fxrstor(Address(rsp, 0));) 6657 addptr(rsp, FPUStateSizeInWords * wordSize); 6658 } 6659 6660 void MacroAssembler::pop_IU_state() { 6661 popa(); 6662 LP64_ONLY(addq(rsp, 8)); 6663 popf(); 6664 } 6665 6666 // Save Integer and Float state 6667 // Warning: Stack must be 16 byte aligned (64bit) 6668 void MacroAssembler::push_CPU_state() { 6669 push_IU_state(); 6670 push_FPU_state(); 6671 } 6672 6673 void MacroAssembler::push_FPU_state() { 6674 subptr(rsp, FPUStateSizeInWords * wordSize); 6675 #ifndef _LP64 6676 fnsave(Address(rsp, 0)); 6677 fwait(); 6678 #else 6679 fxsave(Address(rsp, 0)); 6680 #endif // LP64 6681 } 6682 6683 void MacroAssembler::push_IU_state() { 6684 // Push flags first because pusha kills them 6685 pushf(); 6686 // Make sure rsp stays 16-byte aligned 6687 LP64_ONLY(subq(rsp, 8)); 6688 pusha(); 6689 } 6690 6691 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) { 6692 // determine java_thread register 6693 if (!java_thread->is_valid()) { 6694 java_thread = rdi; 6695 get_thread(java_thread); 6696 } 6697 // we must set sp to zero to clear frame 6698 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); 6699 if (clear_fp) { 6700 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); 6701 } 6702 6703 if (clear_pc) 6704 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); 6705 6706 } 6707 6708 void MacroAssembler::restore_rax(Register tmp) { 6709 if (tmp == noreg) pop(rax); 6710 else if (tmp != rax) mov(rax, tmp); 6711 } 6712 6713 void MacroAssembler::round_to(Register reg, int modulus) { 6714 addptr(reg, modulus - 1); 6715 andptr(reg, -modulus); 6716 } 6717 6718 void MacroAssembler::save_rax(Register tmp) { 6719 if (tmp == noreg) push(rax); 6720 else if (tmp != rax) mov(tmp, rax); 6721 } 6722 6723 // Write serialization page so VM thread can do a pseudo remote membar. 6724 // We use the current thread pointer to calculate a thread specific 6725 // offset to write to within the page. This minimizes bus traffic 6726 // due to cache line collision. 6727 void MacroAssembler::serialize_memory(Register thread, Register tmp) { 6728 movl(tmp, thread); 6729 shrl(tmp, os::get_serialize_page_shift_count()); 6730 andl(tmp, (os::vm_page_size() - sizeof(int))); 6731 6732 Address index(noreg, tmp, Address::times_1); 6733 ExternalAddress page(os::get_memory_serialize_page()); 6734 6735 // Size of store must match masking code above 6736 movl(as_Address(ArrayAddress(page, index)), tmp); 6737 } 6738 6739 // Calls to C land 6740 // 6741 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded 6742 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp 6743 // has to be reset to 0. This is required to allow proper stack traversal. 6744 void MacroAssembler::set_last_Java_frame(Register java_thread, 6745 Register last_java_sp, 6746 Register last_java_fp, 6747 address last_java_pc) { 6748 // determine java_thread register 6749 if (!java_thread->is_valid()) { 6750 java_thread = rdi; 6751 get_thread(java_thread); 6752 } 6753 // determine last_java_sp register 6754 if (!last_java_sp->is_valid()) { 6755 last_java_sp = rsp; 6756 } 6757 6758 // last_java_fp is optional 6759 6760 if (last_java_fp->is_valid()) { 6761 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp); 6762 } 6763 6764 // last_java_pc is optional 6765 6766 if (last_java_pc != NULL) { 6767 lea(Address(java_thread, 6768 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()), 6769 InternalAddress(last_java_pc)); 6770 6771 } 6772 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp); 6773 } 6774 6775 void MacroAssembler::shlptr(Register dst, int imm8) { 6776 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8)); 6777 } 6778 6779 void MacroAssembler::shrptr(Register dst, int imm8) { 6780 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8)); 6781 } 6782 6783 void MacroAssembler::sign_extend_byte(Register reg) { 6784 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) { 6785 movsbl(reg, reg); // movsxb 6786 } else { 6787 shll(reg, 24); 6788 sarl(reg, 24); 6789 } 6790 } 6791 6792 void MacroAssembler::sign_extend_short(Register reg) { 6793 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 6794 movswl(reg, reg); // movsxw 6795 } else { 6796 shll(reg, 16); 6797 sarl(reg, 16); 6798 } 6799 } 6800 6801 ////////////////////////////////////////////////////////////////////////////////// 6802 #ifndef SERIALGC 6803 6804 void MacroAssembler::g1_write_barrier_pre(Register obj, 6805 #ifndef _LP64 6806 Register thread, 6807 #endif 6808 Register tmp, 6809 Register tmp2, 6810 bool tosca_live) { 6811 LP64_ONLY(Register thread = r15_thread;) 6812 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 6813 PtrQueue::byte_offset_of_active())); 6814 6815 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 6816 PtrQueue::byte_offset_of_index())); 6817 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 6818 PtrQueue::byte_offset_of_buf())); 6819 6820 6821 Label done; 6822 Label runtime; 6823 6824 // if (!marking_in_progress) goto done; 6825 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { 6826 cmpl(in_progress, 0); 6827 } else { 6828 assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption"); 6829 cmpb(in_progress, 0); 6830 } 6831 jcc(Assembler::equal, done); 6832 6833 // if (x.f == NULL) goto done; 6834 #ifdef _LP64 6835 load_heap_oop(tmp2, Address(obj, 0)); 6836 #else 6837 movptr(tmp2, Address(obj, 0)); 6838 #endif 6839 cmpptr(tmp2, (int32_t) NULL_WORD); 6840 jcc(Assembler::equal, done); 6841 6842 // Can we store original value in the thread's buffer? 6843 6844 #ifdef _LP64 6845 movslq(tmp, index); 6846 cmpq(tmp, 0); 6847 #else 6848 cmpl(index, 0); 6849 #endif 6850 jcc(Assembler::equal, runtime); 6851 #ifdef _LP64 6852 subq(tmp, wordSize); 6853 movl(index, tmp); 6854 addq(tmp, buffer); 6855 #else 6856 subl(index, wordSize); 6857 movl(tmp, buffer); 6858 addl(tmp, index); 6859 #endif 6860 movptr(Address(tmp, 0), tmp2); 6861 jmp(done); 6862 bind(runtime); 6863 // save the live input values 6864 if(tosca_live) push(rax); 6865 push(obj); 6866 #ifdef _LP64 6867 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), tmp2, r15_thread); 6868 #else 6869 push(thread); 6870 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), tmp2, thread); 6871 pop(thread); 6872 #endif 6873 pop(obj); 6874 if(tosca_live) pop(rax); 6875 bind(done); 6876 6877 } 6878 6879 void MacroAssembler::g1_write_barrier_post(Register store_addr, 6880 Register new_val, 6881 #ifndef _LP64 6882 Register thread, 6883 #endif 6884 Register tmp, 6885 Register tmp2) { 6886 6887 LP64_ONLY(Register thread = r15_thread;) 6888 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() + 6889 PtrQueue::byte_offset_of_index())); 6890 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() + 6891 PtrQueue::byte_offset_of_buf())); 6892 BarrierSet* bs = Universe::heap()->barrier_set(); 6893 CardTableModRefBS* ct = (CardTableModRefBS*)bs; 6894 Label done; 6895 Label runtime; 6896 6897 // Does store cross heap regions? 6898 6899 movptr(tmp, store_addr); 6900 xorptr(tmp, new_val); 6901 shrptr(tmp, HeapRegion::LogOfHRGrainBytes); 6902 jcc(Assembler::equal, done); 6903 6904 // crosses regions, storing NULL? 6905 6906 cmpptr(new_val, (int32_t) NULL_WORD); 6907 jcc(Assembler::equal, done); 6908 6909 // storing region crossing non-NULL, is card already dirty? 6910 6911 ExternalAddress cardtable((address) ct->byte_map_base); 6912 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); 6913 #ifdef _LP64 6914 const Register card_addr = tmp; 6915 6916 movq(card_addr, store_addr); 6917 shrq(card_addr, CardTableModRefBS::card_shift); 6918 6919 lea(tmp2, cardtable); 6920 6921 // get the address of the card 6922 addq(card_addr, tmp2); 6923 #else 6924 const Register card_index = tmp; 6925 6926 movl(card_index, store_addr); 6927 shrl(card_index, CardTableModRefBS::card_shift); 6928 6929 Address index(noreg, card_index, Address::times_1); 6930 const Register card_addr = tmp; 6931 lea(card_addr, as_Address(ArrayAddress(cardtable, index))); 6932 #endif 6933 cmpb(Address(card_addr, 0), 0); 6934 jcc(Assembler::equal, done); 6935 6936 // storing a region crossing, non-NULL oop, card is clean. 6937 // dirty card and log. 6938 6939 movb(Address(card_addr, 0), 0); 6940 6941 cmpl(queue_index, 0); 6942 jcc(Assembler::equal, runtime); 6943 subl(queue_index, wordSize); 6944 movptr(tmp2, buffer); 6945 #ifdef _LP64 6946 movslq(rscratch1, queue_index); 6947 addq(tmp2, rscratch1); 6948 movq(Address(tmp2, 0), card_addr); 6949 #else 6950 addl(tmp2, queue_index); 6951 movl(Address(tmp2, 0), card_index); 6952 #endif 6953 jmp(done); 6954 6955 bind(runtime); 6956 // save the live input values 6957 push(store_addr); 6958 push(new_val); 6959 #ifdef _LP64 6960 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread); 6961 #else 6962 push(thread); 6963 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread); 6964 pop(thread); 6965 #endif 6966 pop(new_val); 6967 pop(store_addr); 6968 6969 bind(done); 6970 6971 } 6972 6973 #endif // SERIALGC 6974 ////////////////////////////////////////////////////////////////////////////////// 6975 6976 6977 void MacroAssembler::store_check(Register obj) { 6978 // Does a store check for the oop in register obj. The content of 6979 // register obj is destroyed afterwards. 6980 store_check_part_1(obj); 6981 store_check_part_2(obj); 6982 } 6983 6984 void MacroAssembler::store_check(Register obj, Address dst) { 6985 store_check(obj); 6986 } 6987 6988 6989 // split the store check operation so that other instructions can be scheduled inbetween 6990 void MacroAssembler::store_check_part_1(Register obj) { 6991 BarrierSet* bs = Universe::heap()->barrier_set(); 6992 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); 6993 shrptr(obj, CardTableModRefBS::card_shift); 6994 } 6995 6996 void MacroAssembler::store_check_part_2(Register obj) { 6997 BarrierSet* bs = Universe::heap()->barrier_set(); 6998 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); 6999 CardTableModRefBS* ct = (CardTableModRefBS*)bs; 7000 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); 7001 7002 // The calculation for byte_map_base is as follows: 7003 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift); 7004 // So this essentially converts an address to a displacement and 7005 // it will never need to be relocated. On 64bit however the value may be too 7006 // large for a 32bit displacement 7007 7008 intptr_t disp = (intptr_t) ct->byte_map_base; 7009 if (is_simm32(disp)) { 7010 Address cardtable(noreg, obj, Address::times_1, disp); 7011 movb(cardtable, 0); 7012 } else { 7013 // By doing it as an ExternalAddress disp could be converted to a rip-relative 7014 // displacement and done in a single instruction given favorable mapping and 7015 // a smarter version of as_Address. Worst case it is two instructions which 7016 // is no worse off then loading disp into a register and doing as a simple 7017 // Address() as above. 7018 // We can't do as ExternalAddress as the only style since if disp == 0 we'll 7019 // assert since NULL isn't acceptable in a reloci (see 6644928). In any case 7020 // in some cases we'll get a single instruction version. 7021 7022 ExternalAddress cardtable((address)disp); 7023 Address index(noreg, obj, Address::times_1); 7024 movb(as_Address(ArrayAddress(cardtable, index)), 0); 7025 } 7026 } 7027 7028 void MacroAssembler::subptr(Register dst, int32_t imm32) { 7029 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32)); 7030 } 7031 7032 void MacroAssembler::subptr(Register dst, Register src) { 7033 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); 7034 } 7035 7036 void MacroAssembler::test32(Register src1, AddressLiteral src2) { 7037 // src2 must be rval 7038 7039 if (reachable(src2)) { 7040 testl(src1, as_Address(src2)); 7041 } else { 7042 lea(rscratch1, src2); 7043 testl(src1, Address(rscratch1, 0)); 7044 } 7045 } 7046 7047 // C++ bool manipulation 7048 void MacroAssembler::testbool(Register dst) { 7049 if(sizeof(bool) == 1) 7050 testb(dst, 0xff); 7051 else if(sizeof(bool) == 2) { 7052 // testw implementation needed for two byte bools 7053 ShouldNotReachHere(); 7054 } else if(sizeof(bool) == 4) 7055 testl(dst, dst); 7056 else 7057 // unsupported 7058 ShouldNotReachHere(); 7059 } 7060 7061 void MacroAssembler::testptr(Register dst, Register src) { 7062 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src)); 7063 } 7064 7065 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes. 7066 void MacroAssembler::tlab_allocate(Register obj, 7067 Register var_size_in_bytes, 7068 int con_size_in_bytes, 7069 Register t1, 7070 Register t2, 7071 Label& slow_case) { 7072 assert_different_registers(obj, t1, t2); 7073 assert_different_registers(obj, var_size_in_bytes, t1); 7074 Register end = t2; 7075 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread); 7076 7077 verify_tlab(); 7078 7079 NOT_LP64(get_thread(thread)); 7080 7081 movptr(obj, Address(thread, JavaThread::tlab_top_offset())); 7082 if (var_size_in_bytes == noreg) { 7083 lea(end, Address(obj, con_size_in_bytes)); 7084 } else { 7085 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); 7086 } 7087 cmpptr(end, Address(thread, JavaThread::tlab_end_offset())); 7088 jcc(Assembler::above, slow_case); 7089 7090 // update the tlab top pointer 7091 movptr(Address(thread, JavaThread::tlab_top_offset()), end); 7092 7093 // recover var_size_in_bytes if necessary 7094 if (var_size_in_bytes == end) { 7095 subptr(var_size_in_bytes, obj); 7096 } 7097 verify_tlab(); 7098 } 7099 7100 // Preserves rbx, and rdx. 7101 void MacroAssembler::tlab_refill(Label& retry, 7102 Label& try_eden, 7103 Label& slow_case) { 7104 Register top = rax; 7105 Register t1 = rcx; 7106 Register t2 = rsi; 7107 Register thread_reg = NOT_LP64(rdi) LP64_ONLY(r15_thread); 7108 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx); 7109 Label do_refill, discard_tlab; 7110 7111 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { 7112 // No allocation in the shared eden. 7113 jmp(slow_case); 7114 } 7115 7116 NOT_LP64(get_thread(thread_reg)); 7117 7118 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 7119 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); 7120 7121 // calculate amount of free space 7122 subptr(t1, top); 7123 shrptr(t1, LogHeapWordSize); 7124 7125 // Retain tlab and allocate object in shared space if 7126 // the amount free in the tlab is too large to discard. 7127 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset()))); 7128 jcc(Assembler::lessEqual, discard_tlab); 7129 7130 // Retain 7131 // %%% yuck as movptr... 7132 movptr(t2, (int32_t) ThreadLocalAllocBuffer::refill_waste_limit_increment()); 7133 addptr(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2); 7134 if (TLABStats) { 7135 // increment number of slow_allocations 7136 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1); 7137 } 7138 jmp(try_eden); 7139 7140 bind(discard_tlab); 7141 if (TLABStats) { 7142 // increment number of refills 7143 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1); 7144 // accumulate wastage -- t1 is amount free in tlab 7145 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1); 7146 } 7147 7148 // if tlab is currently allocated (top or end != null) then 7149 // fill [top, end + alignment_reserve) with array object 7150 testptr (top, top); 7151 jcc(Assembler::zero, do_refill); 7152 7153 // set up the mark word 7154 movptr(Address(top, oopDesc::mark_offset_in_bytes()), (intptr_t)markOopDesc::prototype()->copy_set_hash(0x2)); 7155 // set the length to the remaining space 7156 subptr(t1, typeArrayOopDesc::header_size(T_INT)); 7157 addptr(t1, (int32_t)ThreadLocalAllocBuffer::alignment_reserve()); 7158 shlptr(t1, log2_intptr(HeapWordSize/sizeof(jint))); 7159 movptr(Address(top, arrayOopDesc::length_offset_in_bytes()), t1); 7160 // set klass to intArrayKlass 7161 // dubious reloc why not an oop reloc? 7162 movptr(t1, ExternalAddress((address) Universe::intArrayKlassObj_addr())); 7163 // store klass last. concurrent gcs assumes klass length is valid if 7164 // klass field is not null. 7165 store_klass(top, t1); 7166 7167 // refill the tlab with an eden allocation 7168 bind(do_refill); 7169 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); 7170 shlptr(t1, LogHeapWordSize); 7171 // add object_size ?? 7172 eden_allocate(top, t1, 0, t2, slow_case); 7173 7174 // Check that t1 was preserved in eden_allocate. 7175 #ifdef ASSERT 7176 if (UseTLAB) { 7177 Label ok; 7178 Register tsize = rsi; 7179 assert_different_registers(tsize, thread_reg, t1); 7180 push(tsize); 7181 movptr(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); 7182 shlptr(tsize, LogHeapWordSize); 7183 cmpptr(t1, tsize); 7184 jcc(Assembler::equal, ok); 7185 stop("assert(t1 != tlab size)"); 7186 should_not_reach_here(); 7187 7188 bind(ok); 7189 pop(tsize); 7190 } 7191 #endif 7192 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top); 7193 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top); 7194 addptr(top, t1); 7195 subptr(top, (int32_t)ThreadLocalAllocBuffer::alignment_reserve_in_bytes()); 7196 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top); 7197 verify_tlab(); 7198 jmp(retry); 7199 } 7200 7201 static const double pi_4 = 0.7853981633974483; 7202 7203 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) { 7204 // A hand-coded argument reduction for values in fabs(pi/4, pi/2) 7205 // was attempted in this code; unfortunately it appears that the 7206 // switch to 80-bit precision and back causes this to be 7207 // unprofitable compared with simply performing a runtime call if 7208 // the argument is out of the (-pi/4, pi/4) range. 7209 7210 Register tmp = noreg; 7211 if (!VM_Version::supports_cmov()) { 7212 // fcmp needs a temporary so preserve rbx, 7213 tmp = rbx; 7214 push(tmp); 7215 } 7216 7217 Label slow_case, done; 7218 7219 ExternalAddress pi4_adr = (address)&pi_4; 7220 if (reachable(pi4_adr)) { 7221 // x ?<= pi/4 7222 fld_d(pi4_adr); 7223 fld_s(1); // Stack: X PI/4 X 7224 fabs(); // Stack: |X| PI/4 X 7225 fcmp(tmp); 7226 jcc(Assembler::above, slow_case); 7227 7228 // fastest case: -pi/4 <= x <= pi/4 7229 switch(trig) { 7230 case 's': 7231 fsin(); 7232 break; 7233 case 'c': 7234 fcos(); 7235 break; 7236 case 't': 7237 ftan(); 7238 break; 7239 default: 7240 assert(false, "bad intrinsic"); 7241 break; 7242 } 7243 jmp(done); 7244 } 7245 7246 // slow case: runtime call 7247 bind(slow_case); 7248 // Preserve registers across runtime call 7249 pusha(); 7250 int incoming_argument_and_return_value_offset = -1; 7251 if (num_fpu_regs_in_use > 1) { 7252 // Must preserve all other FPU regs (could alternatively convert 7253 // SharedRuntime::dsin and dcos into assembly routines known not to trash 7254 // FPU state, but can not trust C compiler) 7255 NEEDS_CLEANUP; 7256 // NOTE that in this case we also push the incoming argument to 7257 // the stack and restore it later; we also use this stack slot to 7258 // hold the return value from dsin or dcos. 7259 for (int i = 0; i < num_fpu_regs_in_use; i++) { 7260 subptr(rsp, sizeof(jdouble)); 7261 fstp_d(Address(rsp, 0)); 7262 } 7263 incoming_argument_and_return_value_offset = sizeof(jdouble)*(num_fpu_regs_in_use-1); 7264 fld_d(Address(rsp, incoming_argument_and_return_value_offset)); 7265 } 7266 subptr(rsp, sizeof(jdouble)); 7267 fstp_d(Address(rsp, 0)); 7268 #ifdef _LP64 7269 movdbl(xmm0, Address(rsp, 0)); 7270 #endif // _LP64 7271 7272 // NOTE: we must not use call_VM_leaf here because that requires a 7273 // complete interpreter frame in debug mode -- same bug as 4387334 7274 // MacroAssembler::call_VM_leaf_base is perfectly safe and will 7275 // do proper 64bit abi 7276 7277 NEEDS_CLEANUP; 7278 // Need to add stack banging before this runtime call if it needs to 7279 // be taken; however, there is no generic stack banging routine at 7280 // the MacroAssembler level 7281 switch(trig) { 7282 case 's': 7283 { 7284 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 0); 7285 } 7286 break; 7287 case 'c': 7288 { 7289 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 0); 7290 } 7291 break; 7292 case 't': 7293 { 7294 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 0); 7295 } 7296 break; 7297 default: 7298 assert(false, "bad intrinsic"); 7299 break; 7300 } 7301 #ifdef _LP64 7302 movsd(Address(rsp, 0), xmm0); 7303 fld_d(Address(rsp, 0)); 7304 #endif // _LP64 7305 addptr(rsp, sizeof(jdouble)); 7306 if (num_fpu_regs_in_use > 1) { 7307 // Must save return value to stack and then restore entire FPU stack 7308 fstp_d(Address(rsp, incoming_argument_and_return_value_offset)); 7309 for (int i = 0; i < num_fpu_regs_in_use; i++) { 7310 fld_d(Address(rsp, 0)); 7311 addptr(rsp, sizeof(jdouble)); 7312 } 7313 } 7314 popa(); 7315 7316 // Come here with result in F-TOS 7317 bind(done); 7318 7319 if (tmp != noreg) { 7320 pop(tmp); 7321 } 7322 } 7323 7324 7325 // Look up the method for a megamorphic invokeinterface call. 7326 // The target method is determined by <intf_klass, itable_index>. 7327 // The receiver klass is in recv_klass. 7328 // On success, the result will be in method_result, and execution falls through. 7329 // On failure, execution transfers to the given label. 7330 void MacroAssembler::lookup_interface_method(Register recv_klass, 7331 Register intf_klass, 7332 RegisterOrConstant itable_index, 7333 Register method_result, 7334 Register scan_temp, 7335 Label& L_no_such_interface) { 7336 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); 7337 assert(itable_index.is_constant() || itable_index.as_register() == method_result, 7338 "caller must use same register for non-constant itable index as for method"); 7339 7340 // Compute start of first itableOffsetEntry (which is at the end of the vtable) 7341 int vtable_base = instanceKlass::vtable_start_offset() * wordSize; 7342 int itentry_off = itableMethodEntry::method_offset_in_bytes(); 7343 int scan_step = itableOffsetEntry::size() * wordSize; 7344 int vte_size = vtableEntry::size() * wordSize; 7345 Address::ScaleFactor times_vte_scale = Address::times_ptr; 7346 assert(vte_size == wordSize, "else adjust times_vte_scale"); 7347 7348 movl(scan_temp, Address(recv_klass, instanceKlass::vtable_length_offset() * wordSize)); 7349 7350 // %%% Could store the aligned, prescaled offset in the klassoop. 7351 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base)); 7352 if (HeapWordsPerLong > 1) { 7353 // Round up to align_object_offset boundary 7354 // see code for instanceKlass::start_of_itable! 7355 round_to(scan_temp, BytesPerLong); 7356 } 7357 7358 // Adjust recv_klass by scaled itable_index, so we can free itable_index. 7359 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); 7360 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off)); 7361 7362 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { 7363 // if (scan->interface() == intf) { 7364 // result = (klass + scan->offset() + itable_index); 7365 // } 7366 // } 7367 Label search, found_method; 7368 7369 for (int peel = 1; peel >= 0; peel--) { 7370 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes())); 7371 cmpptr(intf_klass, method_result); 7372 7373 if (peel) { 7374 jccb(Assembler::equal, found_method); 7375 } else { 7376 jccb(Assembler::notEqual, search); 7377 // (invert the test to fall through to found_method...) 7378 } 7379 7380 if (!peel) break; 7381 7382 bind(search); 7383 7384 // Check that the previous entry is non-null. A null entry means that 7385 // the receiver class doesn't implement the interface, and wasn't the 7386 // same as when the caller was compiled. 7387 testptr(method_result, method_result); 7388 jcc(Assembler::zero, L_no_such_interface); 7389 addptr(scan_temp, scan_step); 7390 } 7391 7392 bind(found_method); 7393 7394 // Got a hit. 7395 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes())); 7396 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1)); 7397 } 7398 7399 7400 void MacroAssembler::check_klass_subtype(Register sub_klass, 7401 Register super_klass, 7402 Register temp_reg, 7403 Label& L_success) { 7404 Label L_failure; 7405 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL); 7406 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL); 7407 bind(L_failure); 7408 } 7409 7410 7411 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, 7412 Register super_klass, 7413 Register temp_reg, 7414 Label* L_success, 7415 Label* L_failure, 7416 Label* L_slow_path, 7417 RegisterOrConstant super_check_offset) { 7418 assert_different_registers(sub_klass, super_klass, temp_reg); 7419 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); 7420 if (super_check_offset.is_register()) { 7421 assert_different_registers(sub_klass, super_klass, 7422 super_check_offset.as_register()); 7423 } else if (must_load_sco) { 7424 assert(temp_reg != noreg, "supply either a temp or a register offset"); 7425 } 7426 7427 Label L_fallthrough; 7428 int label_nulls = 0; 7429 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } 7430 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } 7431 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } 7432 assert(label_nulls <= 1, "at most one NULL in the batch"); 7433 7434 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + 7435 Klass::secondary_super_cache_offset_in_bytes()); 7436 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + 7437 Klass::super_check_offset_offset_in_bytes()); 7438 Address super_check_offset_addr(super_klass, sco_offset); 7439 7440 // Hacked jcc, which "knows" that L_fallthrough, at least, is in 7441 // range of a jccb. If this routine grows larger, reconsider at 7442 // least some of these. 7443 #define local_jcc(assembler_cond, label) \ 7444 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \ 7445 else jcc( assembler_cond, label) /*omit semi*/ 7446 7447 // Hacked jmp, which may only be used just before L_fallthrough. 7448 #define final_jmp(label) \ 7449 if (&(label) == &L_fallthrough) { /*do nothing*/ } \ 7450 else jmp(label) /*omit semi*/ 7451 7452 // If the pointers are equal, we are done (e.g., String[] elements). 7453 // This self-check enables sharing of secondary supertype arrays among 7454 // non-primary types such as array-of-interface. Otherwise, each such 7455 // type would need its own customized SSA. 7456 // We move this check to the front of the fast path because many 7457 // type checks are in fact trivially successful in this manner, 7458 // so we get a nicely predicted branch right at the start of the check. 7459 cmpptr(sub_klass, super_klass); 7460 local_jcc(Assembler::equal, *L_success); 7461 7462 // Check the supertype display: 7463 if (must_load_sco) { 7464 // Positive movl does right thing on LP64. 7465 movl(temp_reg, super_check_offset_addr); 7466 super_check_offset = RegisterOrConstant(temp_reg); 7467 } 7468 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0); 7469 cmpptr(super_klass, super_check_addr); // load displayed supertype 7470 7471 // This check has worked decisively for primary supers. 7472 // Secondary supers are sought in the super_cache ('super_cache_addr'). 7473 // (Secondary supers are interfaces and very deeply nested subtypes.) 7474 // This works in the same check above because of a tricky aliasing 7475 // between the super_cache and the primary super display elements. 7476 // (The 'super_check_addr' can address either, as the case requires.) 7477 // Note that the cache is updated below if it does not help us find 7478 // what we need immediately. 7479 // So if it was a primary super, we can just fail immediately. 7480 // Otherwise, it's the slow path for us (no success at this point). 7481 7482 if (super_check_offset.is_register()) { 7483 local_jcc(Assembler::equal, *L_success); 7484 cmpl(super_check_offset.as_register(), sc_offset); 7485 if (L_failure == &L_fallthrough) { 7486 local_jcc(Assembler::equal, *L_slow_path); 7487 } else { 7488 local_jcc(Assembler::notEqual, *L_failure); 7489 final_jmp(*L_slow_path); 7490 } 7491 } else if (super_check_offset.as_constant() == sc_offset) { 7492 // Need a slow path; fast failure is impossible. 7493 if (L_slow_path == &L_fallthrough) { 7494 local_jcc(Assembler::equal, *L_success); 7495 } else { 7496 local_jcc(Assembler::notEqual, *L_slow_path); 7497 final_jmp(*L_success); 7498 } 7499 } else { 7500 // No slow path; it's a fast decision. 7501 if (L_failure == &L_fallthrough) { 7502 local_jcc(Assembler::equal, *L_success); 7503 } else { 7504 local_jcc(Assembler::notEqual, *L_failure); 7505 final_jmp(*L_success); 7506 } 7507 } 7508 7509 bind(L_fallthrough); 7510 7511 #undef local_jcc 7512 #undef final_jmp 7513 } 7514 7515 7516 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, 7517 Register super_klass, 7518 Register temp_reg, 7519 Register temp2_reg, 7520 Label* L_success, 7521 Label* L_failure, 7522 bool set_cond_codes) { 7523 assert_different_registers(sub_klass, super_klass, temp_reg); 7524 if (temp2_reg != noreg) 7525 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg); 7526 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg) 7527 7528 Label L_fallthrough; 7529 int label_nulls = 0; 7530 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } 7531 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } 7532 assert(label_nulls <= 1, "at most one NULL in the batch"); 7533 7534 // a couple of useful fields in sub_klass: 7535 int ss_offset = (klassOopDesc::header_size() * HeapWordSize + 7536 Klass::secondary_supers_offset_in_bytes()); 7537 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + 7538 Klass::secondary_super_cache_offset_in_bytes()); 7539 Address secondary_supers_addr(sub_klass, ss_offset); 7540 Address super_cache_addr( sub_klass, sc_offset); 7541 7542 // Do a linear scan of the secondary super-klass chain. 7543 // This code is rarely used, so simplicity is a virtue here. 7544 // The repne_scan instruction uses fixed registers, which we must spill. 7545 // Don't worry too much about pre-existing connections with the input regs. 7546 7547 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super) 7548 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter) 7549 7550 // Get super_klass value into rax (even if it was in rdi or rcx). 7551 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false; 7552 if (super_klass != rax || UseCompressedOops) { 7553 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; } 7554 mov(rax, super_klass); 7555 } 7556 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; } 7557 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; } 7558 7559 #ifndef PRODUCT 7560 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; 7561 ExternalAddress pst_counter_addr((address) pst_counter); 7562 NOT_LP64( incrementl(pst_counter_addr) ); 7563 LP64_ONLY( lea(rcx, pst_counter_addr) ); 7564 LP64_ONLY( incrementl(Address(rcx, 0)) ); 7565 #endif //PRODUCT 7566 7567 // We will consult the secondary-super array. 7568 movptr(rdi, secondary_supers_addr); 7569 // Load the array length. (Positive movl does right thing on LP64.) 7570 movl(rcx, Address(rdi, arrayOopDesc::length_offset_in_bytes())); 7571 // Skip to start of data. 7572 addptr(rdi, arrayOopDesc::base_offset_in_bytes(T_OBJECT)); 7573 7574 // Scan RCX words at [RDI] for an occurrence of RAX. 7575 // Set NZ/Z based on last compare. 7576 #ifdef _LP64 7577 // This part is tricky, as values in supers array could be 32 or 64 bit wide 7578 // and we store values in objArrays always encoded, thus we need to encode 7579 // the value of rax before repne. Note that rax is dead after the repne. 7580 if (UseCompressedOops) { 7581 encode_heap_oop_not_null(rax); 7582 // The superclass is never null; it would be a basic system error if a null 7583 // pointer were to sneak in here. Note that we have already loaded the 7584 // Klass::super_check_offset from the super_klass in the fast path, 7585 // so if there is a null in that register, we are already in the afterlife. 7586 repne_scanl(); 7587 } else 7588 #endif // _LP64 7589 repne_scan(); 7590 7591 // Unspill the temp. registers: 7592 if (pushed_rdi) pop(rdi); 7593 if (pushed_rcx) pop(rcx); 7594 if (pushed_rax) pop(rax); 7595 7596 if (set_cond_codes) { 7597 // Special hack for the AD files: rdi is guaranteed non-zero. 7598 assert(!pushed_rdi, "rdi must be left non-NULL"); 7599 // Also, the condition codes are properly set Z/NZ on succeed/failure. 7600 } 7601 7602 if (L_failure == &L_fallthrough) 7603 jccb(Assembler::notEqual, *L_failure); 7604 else jcc(Assembler::notEqual, *L_failure); 7605 7606 // Success. Cache the super we found and proceed in triumph. 7607 movptr(super_cache_addr, super_klass); 7608 7609 if (L_success != &L_fallthrough) { 7610 jmp(*L_success); 7611 } 7612 7613 #undef IS_A_TEMP 7614 7615 bind(L_fallthrough); 7616 } 7617 7618 7619 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) { 7620 ucomisd(dst, as_Address(src)); 7621 } 7622 7623 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) { 7624 ucomiss(dst, as_Address(src)); 7625 } 7626 7627 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) { 7628 if (reachable(src)) { 7629 xorpd(dst, as_Address(src)); 7630 } else { 7631 lea(rscratch1, src); 7632 xorpd(dst, Address(rscratch1, 0)); 7633 } 7634 } 7635 7636 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) { 7637 if (reachable(src)) { 7638 xorps(dst, as_Address(src)); 7639 } else { 7640 lea(rscratch1, src); 7641 xorps(dst, Address(rscratch1, 0)); 7642 } 7643 } 7644 7645 void MacroAssembler::verify_oop(Register reg, const char* s) { 7646 if (!VerifyOops) return; 7647 7648 // Pass register number to verify_oop_subroutine 7649 char* b = new char[strlen(s) + 50]; 7650 sprintf(b, "verify_oop: %s: %s", reg->name(), s); 7651 push(rax); // save rax, 7652 push(reg); // pass register argument 7653 ExternalAddress buffer((address) b); 7654 // avoid using pushptr, as it modifies scratch registers 7655 // and our contract is not to modify anything 7656 movptr(rax, buffer.addr()); 7657 push(rax); 7658 // call indirectly to solve generation ordering problem 7659 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); 7660 call(rax); 7661 } 7662 7663 7664 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, 7665 Register tmp, 7666 int offset) { 7667 intptr_t value = *delayed_value_addr; 7668 if (value != 0) 7669 return RegisterOrConstant(value + offset); 7670 7671 // load indirectly to solve generation ordering problem 7672 movptr(tmp, ExternalAddress((address) delayed_value_addr)); 7673 7674 #ifdef ASSERT 7675 Label L; 7676 testptr(tmp, tmp); 7677 jccb(Assembler::notZero, L); 7678 hlt(); 7679 bind(L); 7680 #endif 7681 7682 if (offset != 0) 7683 addptr(tmp, offset); 7684 7685 return RegisterOrConstant(tmp); 7686 } 7687 7688 7689 // registers on entry: 7690 // - rax ('check' register): required MethodType 7691 // - rcx: method handle 7692 // - rdx, rsi, or ?: killable temp 7693 void MacroAssembler::check_method_handle_type(Register mtype_reg, Register mh_reg, 7694 Register temp_reg, 7695 Label& wrong_method_type) { 7696 if (UseCompressedOops) unimplemented(); // field accesses must decode 7697 // compare method type against that of the receiver 7698 cmpptr(mtype_reg, Address(mh_reg, delayed_value(java_dyn_MethodHandle::type_offset_in_bytes, temp_reg))); 7699 jcc(Assembler::notEqual, wrong_method_type); 7700 } 7701 7702 7703 // A method handle has a "vmslots" field which gives the size of its 7704 // argument list in JVM stack slots. This field is either located directly 7705 // in every method handle, or else is indirectly accessed through the 7706 // method handle's MethodType. This macro hides the distinction. 7707 void MacroAssembler::load_method_handle_vmslots(Register vmslots_reg, Register mh_reg, 7708 Register temp_reg) { 7709 if (UseCompressedOops) unimplemented(); // field accesses must decode 7710 // load mh.type.form.vmslots 7711 if (java_dyn_MethodHandle::vmslots_offset_in_bytes() != 0) { 7712 // hoist vmslots into every mh to avoid dependent load chain 7713 movl(vmslots_reg, Address(mh_reg, delayed_value(java_dyn_MethodHandle::vmslots_offset_in_bytes, temp_reg))); 7714 } else { 7715 Register temp2_reg = vmslots_reg; 7716 movptr(temp2_reg, Address(mh_reg, delayed_value(java_dyn_MethodHandle::type_offset_in_bytes, temp_reg))); 7717 movptr(temp2_reg, Address(temp2_reg, delayed_value(java_dyn_MethodType::form_offset_in_bytes, temp_reg))); 7718 movl(vmslots_reg, Address(temp2_reg, delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, temp_reg))); 7719 } 7720 } 7721 7722 7723 // registers on entry: 7724 // - rcx: method handle 7725 // - rdx: killable temp (interpreted only) 7726 // - rax: killable temp (compiled only) 7727 void MacroAssembler::jump_to_method_handle_entry(Register mh_reg, Register temp_reg) { 7728 assert(mh_reg == rcx, "caller must put MH object in rcx"); 7729 assert_different_registers(mh_reg, temp_reg); 7730 7731 if (UseCompressedOops) unimplemented(); // field accesses must decode 7732 7733 // pick out the interpreted side of the handler 7734 movptr(temp_reg, Address(mh_reg, delayed_value(java_dyn_MethodHandle::vmentry_offset_in_bytes, temp_reg))); 7735 7736 // off we go... 7737 jmp(Address(temp_reg, MethodHandleEntry::from_interpreted_entry_offset_in_bytes())); 7738 7739 // for the various stubs which take control at this point, 7740 // see MethodHandles::generate_method_handle_stub 7741 } 7742 7743 7744 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, 7745 int extra_slot_offset) { 7746 // cf. TemplateTable::prepare_invoke(), if (load_receiver). 7747 int stackElementSize = Interpreter::stackElementSize(); 7748 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0); 7749 #ifdef ASSERT 7750 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1); 7751 assert(offset1 - offset == stackElementSize, "correct arithmetic"); 7752 #endif 7753 Register scale_reg = noreg; 7754 Address::ScaleFactor scale_factor = Address::no_scale; 7755 if (arg_slot.is_constant()) { 7756 offset += arg_slot.as_constant() * stackElementSize; 7757 } else { 7758 scale_reg = arg_slot.as_register(); 7759 scale_factor = Address::times(stackElementSize); 7760 } 7761 offset += wordSize; // return PC is on stack 7762 return Address(rsp, scale_reg, scale_factor, offset); 7763 } 7764 7765 7766 void MacroAssembler::verify_oop_addr(Address addr, const char* s) { 7767 if (!VerifyOops) return; 7768 7769 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord); 7770 // Pass register number to verify_oop_subroutine 7771 char* b = new char[strlen(s) + 50]; 7772 sprintf(b, "verify_oop_addr: %s", s); 7773 7774 push(rax); // save rax, 7775 // addr may contain rsp so we will have to adjust it based on the push 7776 // we just did 7777 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which 7778 // stores rax into addr which is backwards of what was intended. 7779 if (addr.uses(rsp)) { 7780 lea(rax, addr); 7781 pushptr(Address(rax, BytesPerWord)); 7782 } else { 7783 pushptr(addr); 7784 } 7785 7786 ExternalAddress buffer((address) b); 7787 // pass msg argument 7788 // avoid using pushptr, as it modifies scratch registers 7789 // and our contract is not to modify anything 7790 movptr(rax, buffer.addr()); 7791 push(rax); 7792 7793 // call indirectly to solve generation ordering problem 7794 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); 7795 call(rax); 7796 // Caller pops the arguments and restores rax, from the stack 7797 } 7798 7799 void MacroAssembler::verify_tlab() { 7800 #ifdef ASSERT 7801 if (UseTLAB && VerifyOops) { 7802 Label next, ok; 7803 Register t1 = rsi; 7804 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread); 7805 7806 push(t1); 7807 NOT_LP64(push(thread_reg)); 7808 NOT_LP64(get_thread(thread_reg)); 7809 7810 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 7811 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); 7812 jcc(Assembler::aboveEqual, next); 7813 stop("assert(top >= start)"); 7814 should_not_reach_here(); 7815 7816 bind(next); 7817 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); 7818 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 7819 jcc(Assembler::aboveEqual, ok); 7820 stop("assert(top <= end)"); 7821 should_not_reach_here(); 7822 7823 bind(ok); 7824 NOT_LP64(pop(thread_reg)); 7825 pop(t1); 7826 } 7827 #endif 7828 } 7829 7830 class ControlWord { 7831 public: 7832 int32_t _value; 7833 7834 int rounding_control() const { return (_value >> 10) & 3 ; } 7835 int precision_control() const { return (_value >> 8) & 3 ; } 7836 bool precision() const { return ((_value >> 5) & 1) != 0; } 7837 bool underflow() const { return ((_value >> 4) & 1) != 0; } 7838 bool overflow() const { return ((_value >> 3) & 1) != 0; } 7839 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } 7840 bool denormalized() const { return ((_value >> 1) & 1) != 0; } 7841 bool invalid() const { return ((_value >> 0) & 1) != 0; } 7842 7843 void print() const { 7844 // rounding control 7845 const char* rc; 7846 switch (rounding_control()) { 7847 case 0: rc = "round near"; break; 7848 case 1: rc = "round down"; break; 7849 case 2: rc = "round up "; break; 7850 case 3: rc = "chop "; break; 7851 }; 7852 // precision control 7853 const char* pc; 7854 switch (precision_control()) { 7855 case 0: pc = "24 bits "; break; 7856 case 1: pc = "reserved"; break; 7857 case 2: pc = "53 bits "; break; 7858 case 3: pc = "64 bits "; break; 7859 }; 7860 // flags 7861 char f[9]; 7862 f[0] = ' '; 7863 f[1] = ' '; 7864 f[2] = (precision ()) ? 'P' : 'p'; 7865 f[3] = (underflow ()) ? 'U' : 'u'; 7866 f[4] = (overflow ()) ? 'O' : 'o'; 7867 f[5] = (zero_divide ()) ? 'Z' : 'z'; 7868 f[6] = (denormalized()) ? 'D' : 'd'; 7869 f[7] = (invalid ()) ? 'I' : 'i'; 7870 f[8] = '\x0'; 7871 // output 7872 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc); 7873 } 7874 7875 }; 7876 7877 class StatusWord { 7878 public: 7879 int32_t _value; 7880 7881 bool busy() const { return ((_value >> 15) & 1) != 0; } 7882 bool C3() const { return ((_value >> 14) & 1) != 0; } 7883 bool C2() const { return ((_value >> 10) & 1) != 0; } 7884 bool C1() const { return ((_value >> 9) & 1) != 0; } 7885 bool C0() const { return ((_value >> 8) & 1) != 0; } 7886 int top() const { return (_value >> 11) & 7 ; } 7887 bool error_status() const { return ((_value >> 7) & 1) != 0; } 7888 bool stack_fault() const { return ((_value >> 6) & 1) != 0; } 7889 bool precision() const { return ((_value >> 5) & 1) != 0; } 7890 bool underflow() const { return ((_value >> 4) & 1) != 0; } 7891 bool overflow() const { return ((_value >> 3) & 1) != 0; } 7892 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } 7893 bool denormalized() const { return ((_value >> 1) & 1) != 0; } 7894 bool invalid() const { return ((_value >> 0) & 1) != 0; } 7895 7896 void print() const { 7897 // condition codes 7898 char c[5]; 7899 c[0] = (C3()) ? '3' : '-'; 7900 c[1] = (C2()) ? '2' : '-'; 7901 c[2] = (C1()) ? '1' : '-'; 7902 c[3] = (C0()) ? '0' : '-'; 7903 c[4] = '\x0'; 7904 // flags 7905 char f[9]; 7906 f[0] = (error_status()) ? 'E' : '-'; 7907 f[1] = (stack_fault ()) ? 'S' : '-'; 7908 f[2] = (precision ()) ? 'P' : '-'; 7909 f[3] = (underflow ()) ? 'U' : '-'; 7910 f[4] = (overflow ()) ? 'O' : '-'; 7911 f[5] = (zero_divide ()) ? 'Z' : '-'; 7912 f[6] = (denormalized()) ? 'D' : '-'; 7913 f[7] = (invalid ()) ? 'I' : '-'; 7914 f[8] = '\x0'; 7915 // output 7916 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top()); 7917 } 7918 7919 }; 7920 7921 class TagWord { 7922 public: 7923 int32_t _value; 7924 7925 int tag_at(int i) const { return (_value >> (i*2)) & 3; } 7926 7927 void print() const { 7928 printf("%04x", _value & 0xFFFF); 7929 } 7930 7931 }; 7932 7933 class FPU_Register { 7934 public: 7935 int32_t _m0; 7936 int32_t _m1; 7937 int16_t _ex; 7938 7939 bool is_indefinite() const { 7940 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0; 7941 } 7942 7943 void print() const { 7944 char sign = (_ex < 0) ? '-' : '+'; 7945 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " "; 7946 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind); 7947 }; 7948 7949 }; 7950 7951 class FPU_State { 7952 public: 7953 enum { 7954 register_size = 10, 7955 number_of_registers = 8, 7956 register_mask = 7 7957 }; 7958 7959 ControlWord _control_word; 7960 StatusWord _status_word; 7961 TagWord _tag_word; 7962 int32_t _error_offset; 7963 int32_t _error_selector; 7964 int32_t _data_offset; 7965 int32_t _data_selector; 7966 int8_t _register[register_size * number_of_registers]; 7967 7968 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); } 7969 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; } 7970 7971 const char* tag_as_string(int tag) const { 7972 switch (tag) { 7973 case 0: return "valid"; 7974 case 1: return "zero"; 7975 case 2: return "special"; 7976 case 3: return "empty"; 7977 } 7978 ShouldNotReachHere() 7979 return NULL; 7980 } 7981 7982 void print() const { 7983 // print computation registers 7984 { int t = _status_word.top(); 7985 for (int i = 0; i < number_of_registers; i++) { 7986 int j = (i - t) & register_mask; 7987 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j); 7988 st(j)->print(); 7989 printf(" %s\n", tag_as_string(_tag_word.tag_at(i))); 7990 } 7991 } 7992 printf("\n"); 7993 // print control registers 7994 printf("ctrl = "); _control_word.print(); printf("\n"); 7995 printf("stat = "); _status_word .print(); printf("\n"); 7996 printf("tags = "); _tag_word .print(); printf("\n"); 7997 } 7998 7999 }; 8000 8001 class Flag_Register { 8002 public: 8003 int32_t _value; 8004 8005 bool overflow() const { return ((_value >> 11) & 1) != 0; } 8006 bool direction() const { return ((_value >> 10) & 1) != 0; } 8007 bool sign() const { return ((_value >> 7) & 1) != 0; } 8008 bool zero() const { return ((_value >> 6) & 1) != 0; } 8009 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; } 8010 bool parity() const { return ((_value >> 2) & 1) != 0; } 8011 bool carry() const { return ((_value >> 0) & 1) != 0; } 8012 8013 void print() const { 8014 // flags 8015 char f[8]; 8016 f[0] = (overflow ()) ? 'O' : '-'; 8017 f[1] = (direction ()) ? 'D' : '-'; 8018 f[2] = (sign ()) ? 'S' : '-'; 8019 f[3] = (zero ()) ? 'Z' : '-'; 8020 f[4] = (auxiliary_carry()) ? 'A' : '-'; 8021 f[5] = (parity ()) ? 'P' : '-'; 8022 f[6] = (carry ()) ? 'C' : '-'; 8023 f[7] = '\x0'; 8024 // output 8025 printf("%08x flags = %s", _value, f); 8026 } 8027 8028 }; 8029 8030 class IU_Register { 8031 public: 8032 int32_t _value; 8033 8034 void print() const { 8035 printf("%08x %11d", _value, _value); 8036 } 8037 8038 }; 8039 8040 class IU_State { 8041 public: 8042 Flag_Register _eflags; 8043 IU_Register _rdi; 8044 IU_Register _rsi; 8045 IU_Register _rbp; 8046 IU_Register _rsp; 8047 IU_Register _rbx; 8048 IU_Register _rdx; 8049 IU_Register _rcx; 8050 IU_Register _rax; 8051 8052 void print() const { 8053 // computation registers 8054 printf("rax, = "); _rax.print(); printf("\n"); 8055 printf("rbx, = "); _rbx.print(); printf("\n"); 8056 printf("rcx = "); _rcx.print(); printf("\n"); 8057 printf("rdx = "); _rdx.print(); printf("\n"); 8058 printf("rdi = "); _rdi.print(); printf("\n"); 8059 printf("rsi = "); _rsi.print(); printf("\n"); 8060 printf("rbp, = "); _rbp.print(); printf("\n"); 8061 printf("rsp = "); _rsp.print(); printf("\n"); 8062 printf("\n"); 8063 // control registers 8064 printf("flgs = "); _eflags.print(); printf("\n"); 8065 } 8066 }; 8067 8068 8069 class CPU_State { 8070 public: 8071 FPU_State _fpu_state; 8072 IU_State _iu_state; 8073 8074 void print() const { 8075 printf("--------------------------------------------------\n"); 8076 _iu_state .print(); 8077 printf("\n"); 8078 _fpu_state.print(); 8079 printf("--------------------------------------------------\n"); 8080 } 8081 8082 }; 8083 8084 8085 static void _print_CPU_state(CPU_State* state) { 8086 state->print(); 8087 }; 8088 8089 8090 void MacroAssembler::print_CPU_state() { 8091 push_CPU_state(); 8092 push(rsp); // pass CPU state 8093 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state))); 8094 addptr(rsp, wordSize); // discard argument 8095 pop_CPU_state(); 8096 } 8097 8098 8099 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) { 8100 static int counter = 0; 8101 FPU_State* fs = &state->_fpu_state; 8102 counter++; 8103 // For leaf calls, only verify that the top few elements remain empty. 8104 // We only need 1 empty at the top for C2 code. 8105 if( stack_depth < 0 ) { 8106 if( fs->tag_for_st(7) != 3 ) { 8107 printf("FPR7 not empty\n"); 8108 state->print(); 8109 assert(false, "error"); 8110 return false; 8111 } 8112 return true; // All other stack states do not matter 8113 } 8114 8115 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std, 8116 "bad FPU control word"); 8117 8118 // compute stack depth 8119 int i = 0; 8120 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++; 8121 int d = i; 8122 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++; 8123 // verify findings 8124 if (i != FPU_State::number_of_registers) { 8125 // stack not contiguous 8126 printf("%s: stack not contiguous at ST%d\n", s, i); 8127 state->print(); 8128 assert(false, "error"); 8129 return false; 8130 } 8131 // check if computed stack depth corresponds to expected stack depth 8132 if (stack_depth < 0) { 8133 // expected stack depth is -stack_depth or less 8134 if (d > -stack_depth) { 8135 // too many elements on the stack 8136 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d); 8137 state->print(); 8138 assert(false, "error"); 8139 return false; 8140 } 8141 } else { 8142 // expected stack depth is stack_depth 8143 if (d != stack_depth) { 8144 // wrong stack depth 8145 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d); 8146 state->print(); 8147 assert(false, "error"); 8148 return false; 8149 } 8150 } 8151 // everything is cool 8152 return true; 8153 } 8154 8155 8156 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { 8157 if (!VerifyFPU) return; 8158 push_CPU_state(); 8159 push(rsp); // pass CPU state 8160 ExternalAddress msg((address) s); 8161 // pass message string s 8162 pushptr(msg.addr()); 8163 push(stack_depth); // pass stack depth 8164 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU))); 8165 addptr(rsp, 3 * wordSize); // discard arguments 8166 // check for error 8167 { Label L; 8168 testl(rax, rax); 8169 jcc(Assembler::notZero, L); 8170 int3(); // break if error condition 8171 bind(L); 8172 } 8173 pop_CPU_state(); 8174 } 8175 8176 void MacroAssembler::load_klass(Register dst, Register src) { 8177 #ifdef _LP64 8178 if (UseCompressedOops) { 8179 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); 8180 decode_heap_oop_not_null(dst); 8181 } else 8182 #endif 8183 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); 8184 } 8185 8186 void MacroAssembler::load_prototype_header(Register dst, Register src) { 8187 #ifdef _LP64 8188 if (UseCompressedOops) { 8189 assert (Universe::heap() != NULL, "java heap should be initialized"); 8190 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); 8191 if (Universe::narrow_oop_shift() != 0) { 8192 assert(Address::times_8 == LogMinObjAlignmentInBytes && 8193 Address::times_8 == Universe::narrow_oop_shift(), "decode alg wrong"); 8194 movq(dst, Address(r12_heapbase, dst, Address::times_8, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes())); 8195 } else { 8196 movq(dst, Address(dst, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes())); 8197 } 8198 } else 8199 #endif 8200 { 8201 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); 8202 movptr(dst, Address(dst, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes())); 8203 } 8204 } 8205 8206 void MacroAssembler::store_klass(Register dst, Register src) { 8207 #ifdef _LP64 8208 if (UseCompressedOops) { 8209 encode_heap_oop_not_null(src); 8210 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src); 8211 } else 8212 #endif 8213 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src); 8214 } 8215 8216 #ifdef _LP64 8217 void MacroAssembler::store_klass_gap(Register dst, Register src) { 8218 if (UseCompressedOops) { 8219 // Store to klass gap in destination 8220 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src); 8221 } 8222 } 8223 8224 void MacroAssembler::load_heap_oop(Register dst, Address src) { 8225 if (UseCompressedOops) { 8226 movl(dst, src); 8227 decode_heap_oop(dst); 8228 } else { 8229 movq(dst, src); 8230 } 8231 } 8232 8233 void MacroAssembler::store_heap_oop(Address dst, Register src) { 8234 if (UseCompressedOops) { 8235 assert(!dst.uses(src), "not enough registers"); 8236 encode_heap_oop(src); 8237 movl(dst, src); 8238 } else { 8239 movq(dst, src); 8240 } 8241 } 8242 8243 // Used for storing NULLs. 8244 void MacroAssembler::store_heap_oop_null(Address dst) { 8245 if (UseCompressedOops) { 8246 movl(dst, (int32_t)NULL_WORD); 8247 } else { 8248 movslq(dst, (int32_t)NULL_WORD); 8249 } 8250 } 8251 8252 // Algorithm must match oop.inline.hpp encode_heap_oop. 8253 void MacroAssembler::encode_heap_oop(Register r) { 8254 assert (UseCompressedOops, "should be compressed"); 8255 assert (Universe::heap() != NULL, "java heap should be initialized"); 8256 if (Universe::narrow_oop_base() == NULL) { 8257 verify_oop(r, "broken oop in encode_heap_oop"); 8258 if (Universe::narrow_oop_shift() != 0) { 8259 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 8260 shrq(r, LogMinObjAlignmentInBytes); 8261 } 8262 return; 8263 } 8264 #ifdef ASSERT 8265 if (CheckCompressedOops) { 8266 Label ok; 8267 push(rscratch1); // cmpptr trashes rscratch1 8268 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_oop_base_addr())); 8269 jcc(Assembler::equal, ok); 8270 stop("MacroAssembler::encode_heap_oop: heap base corrupted?"); 8271 bind(ok); 8272 pop(rscratch1); 8273 } 8274 #endif 8275 verify_oop(r, "broken oop in encode_heap_oop"); 8276 testq(r, r); 8277 cmovq(Assembler::equal, r, r12_heapbase); 8278 subq(r, r12_heapbase); 8279 shrq(r, LogMinObjAlignmentInBytes); 8280 } 8281 8282 void MacroAssembler::encode_heap_oop_not_null(Register r) { 8283 assert (UseCompressedOops, "should be compressed"); 8284 assert (Universe::heap() != NULL, "java heap should be initialized"); 8285 #ifdef ASSERT 8286 if (CheckCompressedOops) { 8287 Label ok; 8288 testq(r, r); 8289 jcc(Assembler::notEqual, ok); 8290 stop("null oop passed to encode_heap_oop_not_null"); 8291 bind(ok); 8292 } 8293 #endif 8294 verify_oop(r, "broken oop in encode_heap_oop_not_null"); 8295 if (Universe::narrow_oop_base() != NULL) { 8296 subq(r, r12_heapbase); 8297 } 8298 if (Universe::narrow_oop_shift() != 0) { 8299 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 8300 shrq(r, LogMinObjAlignmentInBytes); 8301 } 8302 } 8303 8304 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) { 8305 assert (UseCompressedOops, "should be compressed"); 8306 assert (Universe::heap() != NULL, "java heap should be initialized"); 8307 #ifdef ASSERT 8308 if (CheckCompressedOops) { 8309 Label ok; 8310 testq(src, src); 8311 jcc(Assembler::notEqual, ok); 8312 stop("null oop passed to encode_heap_oop_not_null2"); 8313 bind(ok); 8314 } 8315 #endif 8316 verify_oop(src, "broken oop in encode_heap_oop_not_null2"); 8317 if (dst != src) { 8318 movq(dst, src); 8319 } 8320 if (Universe::narrow_oop_base() != NULL) { 8321 subq(dst, r12_heapbase); 8322 } 8323 if (Universe::narrow_oop_shift() != 0) { 8324 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 8325 shrq(dst, LogMinObjAlignmentInBytes); 8326 } 8327 } 8328 8329 void MacroAssembler::decode_heap_oop(Register r) { 8330 assert (UseCompressedOops, "should be compressed"); 8331 assert (Universe::heap() != NULL, "java heap should be initialized"); 8332 if (Universe::narrow_oop_base() == NULL) { 8333 if (Universe::narrow_oop_shift() != 0) { 8334 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 8335 shlq(r, LogMinObjAlignmentInBytes); 8336 } 8337 verify_oop(r, "broken oop in decode_heap_oop"); 8338 return; 8339 } 8340 #ifdef ASSERT 8341 if (CheckCompressedOops) { 8342 Label ok; 8343 push(rscratch1); 8344 cmpptr(r12_heapbase, 8345 ExternalAddress((address)Universe::narrow_oop_base_addr())); 8346 jcc(Assembler::equal, ok); 8347 stop("MacroAssembler::decode_heap_oop: heap base corrupted?"); 8348 bind(ok); 8349 pop(rscratch1); 8350 } 8351 #endif 8352 8353 Label done; 8354 shlq(r, LogMinObjAlignmentInBytes); 8355 jccb(Assembler::equal, done); 8356 addq(r, r12_heapbase); 8357 #if 0 8358 // alternate decoding probably a wash. 8359 testq(r, r); 8360 jccb(Assembler::equal, done); 8361 leaq(r, Address(r12_heapbase, r, Address::times_8, 0)); 8362 #endif 8363 bind(done); 8364 verify_oop(r, "broken oop in decode_heap_oop"); 8365 } 8366 8367 void MacroAssembler::decode_heap_oop_not_null(Register r) { 8368 assert (UseCompressedOops, "should only be used for compressed headers"); 8369 assert (Universe::heap() != NULL, "java heap should be initialized"); 8370 // Cannot assert, unverified entry point counts instructions (see .ad file) 8371 // vtableStubs also counts instructions in pd_code_size_limit. 8372 // Also do not verify_oop as this is called by verify_oop. 8373 if (Universe::narrow_oop_shift() != 0) { 8374 assert (Address::times_8 == LogMinObjAlignmentInBytes && 8375 Address::times_8 == Universe::narrow_oop_shift(), "decode alg wrong"); 8376 // Don't use Shift since it modifies flags. 8377 leaq(r, Address(r12_heapbase, r, Address::times_8, 0)); 8378 } else { 8379 assert (Universe::narrow_oop_base() == NULL, "sanity"); 8380 } 8381 } 8382 8383 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) { 8384 assert (UseCompressedOops, "should only be used for compressed headers"); 8385 assert (Universe::heap() != NULL, "java heap should be initialized"); 8386 // Cannot assert, unverified entry point counts instructions (see .ad file) 8387 // vtableStubs also counts instructions in pd_code_size_limit. 8388 // Also do not verify_oop as this is called by verify_oop. 8389 if (Universe::narrow_oop_shift() != 0) { 8390 assert (Address::times_8 == LogMinObjAlignmentInBytes && 8391 Address::times_8 == Universe::narrow_oop_shift(), "decode alg wrong"); 8392 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); 8393 } else if (dst != src) { 8394 assert (Universe::narrow_oop_base() == NULL, "sanity"); 8395 movq(dst, src); 8396 } 8397 } 8398 8399 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) { 8400 assert (UseCompressedOops, "should only be used for compressed headers"); 8401 assert (Universe::heap() != NULL, "java heap should be initialized"); 8402 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 8403 int oop_index = oop_recorder()->find_index(obj); 8404 RelocationHolder rspec = oop_Relocation::spec(oop_index); 8405 mov_narrow_oop(dst, oop_index, rspec); 8406 } 8407 8408 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) { 8409 assert (UseCompressedOops, "should only be used for compressed headers"); 8410 assert (Universe::heap() != NULL, "java heap should be initialized"); 8411 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 8412 int oop_index = oop_recorder()->find_index(obj); 8413 RelocationHolder rspec = oop_Relocation::spec(oop_index); 8414 mov_narrow_oop(dst, oop_index, rspec); 8415 } 8416 8417 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) { 8418 assert (UseCompressedOops, "should only be used for compressed headers"); 8419 assert (Universe::heap() != NULL, "java heap should be initialized"); 8420 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 8421 int oop_index = oop_recorder()->find_index(obj); 8422 RelocationHolder rspec = oop_Relocation::spec(oop_index); 8423 Assembler::cmp_narrow_oop(dst, oop_index, rspec); 8424 } 8425 8426 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) { 8427 assert (UseCompressedOops, "should only be used for compressed headers"); 8428 assert (Universe::heap() != NULL, "java heap should be initialized"); 8429 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 8430 int oop_index = oop_recorder()->find_index(obj); 8431 RelocationHolder rspec = oop_Relocation::spec(oop_index); 8432 Assembler::cmp_narrow_oop(dst, oop_index, rspec); 8433 } 8434 8435 void MacroAssembler::reinit_heapbase() { 8436 if (UseCompressedOops) { 8437 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_oop_base_addr())); 8438 } 8439 } 8440 #endif // _LP64 8441 8442 // IndexOf substring. 8443 void MacroAssembler::string_indexof(Register str1, Register str2, 8444 Register cnt1, Register cnt2, Register result, 8445 XMMRegister vec, Register tmp) { 8446 assert(UseSSE42Intrinsics, "SSE4.2 is required"); 8447 8448 Label RELOAD_SUBSTR, PREP_FOR_SCAN, SCAN_TO_SUBSTR, 8449 SCAN_SUBSTR, RET_NOT_FOUND, CLEANUP; 8450 8451 push(str1); // string addr 8452 push(str2); // substr addr 8453 push(cnt2); // substr count 8454 jmpb(PREP_FOR_SCAN); 8455 8456 // Substr count saved at sp 8457 // Substr saved at sp+1*wordSize 8458 // String saved at sp+2*wordSize 8459 8460 // Reload substr for rescan 8461 bind(RELOAD_SUBSTR); 8462 movl(cnt2, Address(rsp, 0)); 8463 movptr(str2, Address(rsp, wordSize)); 8464 // We came here after the beginninig of the substring was 8465 // matched but the rest of it was not so we need to search 8466 // again. Start from the next element after the previous match. 8467 subptr(str1, result); // Restore counter 8468 shrl(str1, 1); 8469 addl(cnt1, str1); 8470 decrementl(cnt1); 8471 lea(str1, Address(result, 2)); // Reload string 8472 8473 // Load substr 8474 bind(PREP_FOR_SCAN); 8475 movdqu(vec, Address(str2, 0)); 8476 addl(cnt1, 8); // prime the loop 8477 subptr(str1, 16); 8478 8479 // Scan string for substr in 16-byte vectors 8480 bind(SCAN_TO_SUBSTR); 8481 subl(cnt1, 8); 8482 addptr(str1, 16); 8483 8484 // pcmpestri 8485 // inputs: 8486 // xmm - substring 8487 // rax - substring length (elements count) 8488 // mem - scaned string 8489 // rdx - string length (elements count) 8490 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) 8491 // outputs: 8492 // rcx - matched index in string 8493 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 8494 8495 pcmpestri(vec, Address(str1, 0), 0x0d); 8496 jcc(Assembler::above, SCAN_TO_SUBSTR); // CF == 0 && ZF == 0 8497 jccb(Assembler::aboveEqual, RET_NOT_FOUND); // CF == 0 8498 8499 // Fallthrough: found a potential substr 8500 8501 // Make sure string is still long enough 8502 subl(cnt1, tmp); 8503 cmpl(cnt1, cnt2); 8504 jccb(Assembler::negative, RET_NOT_FOUND); 8505 // Compute start addr of substr 8506 lea(str1, Address(str1, tmp, Address::times_2)); 8507 movptr(result, str1); // save 8508 8509 // Compare potential substr 8510 addl(cnt1, 8); // prime the loop 8511 addl(cnt2, 8); 8512 subptr(str1, 16); 8513 subptr(str2, 16); 8514 8515 // Scan 16-byte vectors of string and substr 8516 bind(SCAN_SUBSTR); 8517 subl(cnt1, 8); 8518 subl(cnt2, 8); 8519 addptr(str1, 16); 8520 addptr(str2, 16); 8521 movdqu(vec, Address(str2, 0)); 8522 pcmpestri(vec, Address(str1, 0), 0x0d); 8523 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 8524 jcc(Assembler::positive, SCAN_SUBSTR); // SF == 0 8525 8526 // Compute substr offset 8527 subptr(result, Address(rsp, 2*wordSize)); 8528 shrl(result, 1); // index 8529 jmpb(CLEANUP); 8530 8531 bind(RET_NOT_FOUND); 8532 movl(result, -1); 8533 8534 bind(CLEANUP); 8535 addptr(rsp, 3*wordSize); 8536 } 8537 8538 // Compare strings. 8539 void MacroAssembler::string_compare(Register str1, Register str2, 8540 Register cnt1, Register cnt2, Register result, 8541 XMMRegister vec1, XMMRegister vec2) { 8542 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL; 8543 8544 // Compute the minimum of the string lengths and the 8545 // difference of the string lengths (stack). 8546 // Do the conditional move stuff 8547 movl(result, cnt1); 8548 subl(cnt1, cnt2); 8549 push(cnt1); 8550 if (VM_Version::supports_cmov()) { 8551 cmovl(Assembler::lessEqual, cnt2, result); 8552 } else { 8553 Label GT_LABEL; 8554 jccb(Assembler::greater, GT_LABEL); 8555 movl(cnt2, result); 8556 bind(GT_LABEL); 8557 } 8558 8559 // Is the minimum length zero? 8560 testl(cnt2, cnt2); 8561 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 8562 8563 // Load first characters 8564 load_unsigned_short(result, Address(str1, 0)); 8565 load_unsigned_short(cnt1, Address(str2, 0)); 8566 8567 // Compare first characters 8568 subl(result, cnt1); 8569 jcc(Assembler::notZero, POP_LABEL); 8570 decrementl(cnt2); 8571 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 8572 8573 { 8574 // Check after comparing first character to see if strings are equivalent 8575 Label LSkip2; 8576 // Check if the strings start at same location 8577 cmpptr(str1, str2); 8578 jccb(Assembler::notEqual, LSkip2); 8579 8580 // Check if the length difference is zero (from stack) 8581 cmpl(Address(rsp, 0), 0x0); 8582 jcc(Assembler::equal, LENGTH_DIFF_LABEL); 8583 8584 // Strings might not be equivalent 8585 bind(LSkip2); 8586 } 8587 8588 // Advance to next character 8589 addptr(str1, 2); 8590 addptr(str2, 2); 8591 8592 if (UseSSE42Intrinsics) { 8593 // With SSE4.2, use double quad vector compare 8594 Label COMPARE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL; 8595 // Setup to compare 16-byte vectors 8596 movl(cnt1, cnt2); 8597 andl(cnt2, 0xfffffff8); // cnt2 holds the vector count 8598 andl(cnt1, 0x00000007); // cnt1 holds the tail count 8599 testl(cnt2, cnt2); 8600 jccb(Assembler::zero, COMPARE_TAIL); 8601 8602 lea(str2, Address(str2, cnt2, Address::times_2)); 8603 lea(str1, Address(str1, cnt2, Address::times_2)); 8604 negptr(cnt2); 8605 8606 bind(COMPARE_VECTORS); 8607 movdqu(vec1, Address(str1, cnt2, Address::times_2)); 8608 movdqu(vec2, Address(str2, cnt2, Address::times_2)); 8609 pxor(vec1, vec2); 8610 ptest(vec1, vec1); 8611 jccb(Assembler::notZero, VECTOR_NOT_EQUAL); 8612 addptr(cnt2, 8); 8613 jcc(Assembler::notZero, COMPARE_VECTORS); 8614 jmpb(COMPARE_TAIL); 8615 8616 // Mismatched characters in the vectors 8617 bind(VECTOR_NOT_EQUAL); 8618 lea(str1, Address(str1, cnt2, Address::times_2)); 8619 lea(str2, Address(str2, cnt2, Address::times_2)); 8620 movl(cnt1, 8); 8621 8622 // Compare tail (< 8 chars), or rescan last vectors to 8623 // find 1st mismatched characters 8624 bind(COMPARE_TAIL); 8625 testl(cnt1, cnt1); 8626 jccb(Assembler::zero, LENGTH_DIFF_LABEL); 8627 movl(cnt2, cnt1); 8628 // Fallthru to tail compare 8629 } 8630 8631 // Shift str2 and str1 to the end of the arrays, negate min 8632 lea(str1, Address(str1, cnt2, Address::times_2, 0)); 8633 lea(str2, Address(str2, cnt2, Address::times_2, 0)); 8634 negptr(cnt2); 8635 8636 // Compare the rest of the characters 8637 bind(WHILE_HEAD_LABEL); 8638 load_unsigned_short(result, Address(str1, cnt2, Address::times_2, 0)); 8639 load_unsigned_short(cnt1, Address(str2, cnt2, Address::times_2, 0)); 8640 subl(result, cnt1); 8641 jccb(Assembler::notZero, POP_LABEL); 8642 increment(cnt2); 8643 jcc(Assembler::notZero, WHILE_HEAD_LABEL); 8644 8645 // Strings are equal up to min length. Return the length difference. 8646 bind(LENGTH_DIFF_LABEL); 8647 pop(result); 8648 jmpb(DONE_LABEL); 8649 8650 // Discard the stored length difference 8651 bind(POP_LABEL); 8652 addptr(rsp, wordSize); 8653 8654 // That's it 8655 bind(DONE_LABEL); 8656 } 8657 8658 // Compare char[] arrays aligned to 4 bytes or substrings. 8659 void MacroAssembler::char_arrays_equals(bool is_array_equ, Register ary1, Register ary2, 8660 Register limit, Register result, Register chr, 8661 XMMRegister vec1, XMMRegister vec2) { 8662 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR; 8663 8664 int length_offset = arrayOopDesc::length_offset_in_bytes(); 8665 int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR); 8666 8667 // Check the input args 8668 cmpptr(ary1, ary2); 8669 jcc(Assembler::equal, TRUE_LABEL); 8670 8671 if (is_array_equ) { 8672 // Need additional checks for arrays_equals. 8673 testptr(ary1, ary1); 8674 jcc(Assembler::zero, FALSE_LABEL); 8675 testptr(ary2, ary2); 8676 jcc(Assembler::zero, FALSE_LABEL); 8677 8678 // Check the lengths 8679 movl(limit, Address(ary1, length_offset)); 8680 cmpl(limit, Address(ary2, length_offset)); 8681 jcc(Assembler::notEqual, FALSE_LABEL); 8682 } 8683 8684 // count == 0 8685 testl(limit, limit); 8686 jcc(Assembler::zero, TRUE_LABEL); 8687 8688 if (is_array_equ) { 8689 // Load array address 8690 lea(ary1, Address(ary1, base_offset)); 8691 lea(ary2, Address(ary2, base_offset)); 8692 } 8693 8694 shll(limit, 1); // byte count != 0 8695 movl(result, limit); // copy 8696 8697 if (UseSSE42Intrinsics) { 8698 // With SSE4.2, use double quad vector compare 8699 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8700 // Compare 16-byte vectors 8701 andl(result, 0x0000000e); // tail count (in bytes) 8702 andl(limit, 0xfffffff0); // vector count (in bytes) 8703 jccb(Assembler::zero, COMPARE_TAIL); 8704 8705 lea(ary1, Address(ary1, limit, Address::times_1)); 8706 lea(ary2, Address(ary2, limit, Address::times_1)); 8707 negptr(limit); 8708 8709 bind(COMPARE_WIDE_VECTORS); 8710 movdqu(vec1, Address(ary1, limit, Address::times_1)); 8711 movdqu(vec2, Address(ary2, limit, Address::times_1)); 8712 pxor(vec1, vec2); 8713 ptest(vec1, vec1); 8714 jccb(Assembler::notZero, FALSE_LABEL); 8715 addptr(limit, 16); 8716 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8717 8718 bind(COMPARE_TAIL); // limit is zero 8719 movl(limit, result); 8720 // Fallthru to tail compare 8721 } 8722 8723 // Compare 4-byte vectors 8724 andl(limit, 0xfffffffc); // vector count (in bytes) 8725 jccb(Assembler::zero, COMPARE_CHAR); 8726 8727 lea(ary1, Address(ary1, limit, Address::times_1)); 8728 lea(ary2, Address(ary2, limit, Address::times_1)); 8729 negptr(limit); 8730 8731 bind(COMPARE_VECTORS); 8732 movl(chr, Address(ary1, limit, Address::times_1)); 8733 cmpl(chr, Address(ary2, limit, Address::times_1)); 8734 jccb(Assembler::notEqual, FALSE_LABEL); 8735 addptr(limit, 4); 8736 jcc(Assembler::notZero, COMPARE_VECTORS); 8737 8738 // Compare trailing char (final 2 bytes), if any 8739 bind(COMPARE_CHAR); 8740 testl(result, 0x2); // tail char 8741 jccb(Assembler::zero, TRUE_LABEL); 8742 load_unsigned_short(chr, Address(ary1, 0)); 8743 load_unsigned_short(limit, Address(ary2, 0)); 8744 cmpl(chr, limit); 8745 jccb(Assembler::notEqual, FALSE_LABEL); 8746 8747 bind(TRUE_LABEL); 8748 movl(result, 1); // return true 8749 jmpb(DONE); 8750 8751 bind(FALSE_LABEL); 8752 xorl(result, result); // return false 8753 8754 // That's it 8755 bind(DONE); 8756 } 8757 8758 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { 8759 switch (cond) { 8760 // Note some conditions are synonyms for others 8761 case Assembler::zero: return Assembler::notZero; 8762 case Assembler::notZero: return Assembler::zero; 8763 case Assembler::less: return Assembler::greaterEqual; 8764 case Assembler::lessEqual: return Assembler::greater; 8765 case Assembler::greater: return Assembler::lessEqual; 8766 case Assembler::greaterEqual: return Assembler::less; 8767 case Assembler::below: return Assembler::aboveEqual; 8768 case Assembler::belowEqual: return Assembler::above; 8769 case Assembler::above: return Assembler::belowEqual; 8770 case Assembler::aboveEqual: return Assembler::below; 8771 case Assembler::overflow: return Assembler::noOverflow; 8772 case Assembler::noOverflow: return Assembler::overflow; 8773 case Assembler::negative: return Assembler::positive; 8774 case Assembler::positive: return Assembler::negative; 8775 case Assembler::parity: return Assembler::noParity; 8776 case Assembler::noParity: return Assembler::parity; 8777 } 8778 ShouldNotReachHere(); return Assembler::overflow; 8779 } 8780 8781 SkipIfEqual::SkipIfEqual( 8782 MacroAssembler* masm, const bool* flag_addr, bool value) { 8783 _masm = masm; 8784 _masm->cmp8(ExternalAddress((address)flag_addr), value); 8785 _masm->jcc(Assembler::equal, _label); 8786 } 8787 8788 SkipIfEqual::~SkipIfEqual() { 8789 _masm->bind(_label); 8790 }