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Issue 545108: X64 implementation of native ascii string compare. (Closed)
Patch Set: Created 10 years, 11 months ago
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1 // Copyright 2009 the V8 project authors. All rights reserved. 1 // Copyright 2009 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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574 if (first.is(second)) { 574 if (first.is(second)) {
575 return CheckSmi(first); 575 return CheckSmi(first);
576 } 576 }
577 movl(kScratchRegister, first); 577 movl(kScratchRegister, first);
578 orl(kScratchRegister, second); 578 orl(kScratchRegister, second);
579 testb(kScratchRegister, Immediate(kSmiTagMask)); 579 testb(kScratchRegister, Immediate(kSmiTagMask));
580 return zero; 580 return zero;
581 } 581 }
582 582
583 583
584 Condition MacroAssembler::CheckEitherSmi(Register first, Register second) {
585 if (first.is(second)) {
586 return CheckSmi(first);
587 }
588 movl(kScratchRegister, first);
589 andl(kScratchRegister, second);
590 testb(kScratchRegister, Immediate(kSmiTagMask));
591 return zero;
592 }
593
594
584 Condition MacroAssembler::CheckIsMinSmi(Register src) { 595 Condition MacroAssembler::CheckIsMinSmi(Register src) {
585 ASSERT(kSmiTag == 0 && kSmiTagSize == 1); 596 ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
586 movq(kScratchRegister, src); 597 movq(kScratchRegister, src);
587 rol(kScratchRegister, Immediate(1)); 598 rol(kScratchRegister, Immediate(1));
588 cmpq(kScratchRegister, Immediate(1)); 599 cmpq(kScratchRegister, Immediate(1));
589 return equal; 600 return equal;
590 } 601 }
591 602
592 603
593 Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { 604 Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) {
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2400 CodePatcher::~CodePatcher() { 2411 CodePatcher::~CodePatcher() {
2401 // Indicate that code has changed. 2412 // Indicate that code has changed.
2402 CPU::FlushICache(address_, size_); 2413 CPU::FlushICache(address_, size_);
2403 2414
2404 // Check that the code was patched as expected. 2415 // Check that the code was patched as expected.
2405 ASSERT(masm_.pc_ == address_ + size_); 2416 ASSERT(masm_.pc_ == address_ + size_);
2406 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 2417 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
2407 } 2418 }
2408 2419
2409 } } // namespace v8::internal 2420 } } // namespace v8::internal
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