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Issue 10263008: Implement clearing of CompareICs. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Addressed moar comments by Vyacheslav Egorov. Created 8 years, 7 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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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3731 3731
3732 return n_of_valid_regs != n_of_non_aliasing_regs; 3732 return n_of_valid_regs != n_of_non_aliasing_regs;
3733 } 3733 }
3734 #endif 3734 #endif
3735 3735
3736 3736
3737 CodePatcher::CodePatcher(byte* address, int instructions) 3737 CodePatcher::CodePatcher(byte* address, int instructions)
3738 : address_(address), 3738 : address_(address),
3739 instructions_(instructions), 3739 instructions_(instructions),
3740 size_(instructions * Assembler::kInstrSize), 3740 size_(instructions * Assembler::kInstrSize),
3741 masm_(Isolate::Current(), address, size_ + Assembler::kGap) { 3741 masm_(NULL, address, size_ + Assembler::kGap) {
3742 // Create a new macro assembler pointing to the address of the code to patch. 3742 // Create a new macro assembler pointing to the address of the code to patch.
3743 // The size is adjusted with kGap on order for the assembler to generate size 3743 // The size is adjusted with kGap on order for the assembler to generate size
3744 // bytes of instructions without failing with buffer size constraints. 3744 // bytes of instructions without failing with buffer size constraints.
3745 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 3745 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
3746 } 3746 }
3747 3747
3748 3748
3749 CodePatcher::~CodePatcher() { 3749 CodePatcher::~CodePatcher() {
3750 // Indicate that code has changed. 3750 // Indicate that code has changed.
3751 CPU::FlushICache(address_, size_); 3751 CPU::FlushICache(address_, size_);
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3769 void CodePatcher::EmitCondition(Condition cond) { 3769 void CodePatcher::EmitCondition(Condition cond) {
3770 Instr instr = Assembler::instr_at(masm_.pc_); 3770 Instr instr = Assembler::instr_at(masm_.pc_);
3771 instr = (instr & ~kCondMask) | cond; 3771 instr = (instr & ~kCondMask) | cond;
3772 masm_.emit(instr); 3772 masm_.emit(instr);
3773 } 3773 }
3774 3774
3775 3775
3776 } } // namespace v8::internal 3776 } } // namespace v8::internal
3777 3777
3778 #endif // V8_TARGET_ARCH_ARM 3778 #endif // V8_TARGET_ARCH_ARM
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