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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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4701 virtual void Generate() V8_OVERRIDE { | 4701 virtual void Generate() V8_OVERRIDE { |
4702 codegen()->DoDeferredNumberTagI(instr_, | 4702 codegen()->DoDeferredNumberTagI(instr_, |
4703 instr_->value(), | 4703 instr_->value(), |
4704 UNSIGNED_INT32); | 4704 UNSIGNED_INT32); |
4705 } | 4705 } |
4706 virtual LInstruction* instr() V8_OVERRIDE { return instr_; } | 4706 virtual LInstruction* instr() V8_OVERRIDE { return instr_; } |
4707 private: | 4707 private: |
4708 LNumberTagU* instr_; | 4708 LNumberTagU* instr_; |
4709 }; | 4709 }; |
4710 | 4710 |
4711 LOperand* input = instr->value(); | 4711 Register input = ToRegister(instr->value()); |
4712 ASSERT(input->IsRegister() && input->Equals(instr->result())); | 4712 Register result = ToRegister(instr->result()); |
4713 Register reg = ToRegister(input); | |
4714 | 4713 |
4715 DeferredNumberTagU* deferred = new(zone()) DeferredNumberTagU(this, instr); | 4714 DeferredNumberTagU* deferred = new(zone()) DeferredNumberTagU(this, instr); |
4716 __ Branch(deferred->entry(), hi, reg, Operand(Smi::kMaxValue)); | 4715 __ Branch(deferred->entry(), hi, input, Operand(Smi::kMaxValue)); |
4717 __ SmiTag(reg, reg); | 4716 __ SmiTag(result, input); |
4718 __ bind(deferred->exit()); | 4717 __ bind(deferred->exit()); |
4719 } | 4718 } |
4720 | 4719 |
4721 | 4720 |
4722 void LCodeGen::DoDeferredNumberTagI(LInstruction* instr, | 4721 void LCodeGen::DoDeferredNumberTagI(LInstruction* instr, |
4723 LOperand* value, | 4722 LOperand* value, |
4724 IntegerSignedness signedness) { | 4723 IntegerSignedness signedness) { |
4725 Label slow; | 4724 Label slow; |
4726 Register src = ToRegister(value); | 4725 Register src = ToRegister(value); |
4727 Register dst = ToRegister(instr->result()); | 4726 Register dst = ToRegister(instr->result()); |
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5870 __ Subu(scratch, result, scratch); | 5869 __ Subu(scratch, result, scratch); |
5871 __ lw(result, FieldMemOperand(scratch, | 5870 __ lw(result, FieldMemOperand(scratch, |
5872 FixedArray::kHeaderSize - kPointerSize)); | 5871 FixedArray::kHeaderSize - kPointerSize)); |
5873 __ bind(&done); | 5872 __ bind(&done); |
5874 } | 5873 } |
5875 | 5874 |
5876 | 5875 |
5877 #undef __ | 5876 #undef __ |
5878 | 5877 |
5879 } } // namespace v8::internal | 5878 } } // namespace v8::internal |
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