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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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4149 | 4149 |
4150 void LCodeGen::DoMathLog(LMathLog* instr) { | 4150 void LCodeGen::DoMathLog(LMathLog* instr) { |
4151 CpuFeatureScope scope(masm(), SSE2); | 4151 CpuFeatureScope scope(masm(), SSE2); |
4152 ASSERT(instr->value()->Equals(instr->result())); | 4152 ASSERT(instr->value()->Equals(instr->result())); |
4153 XMMRegister input_reg = ToDoubleRegister(instr->value()); | 4153 XMMRegister input_reg = ToDoubleRegister(instr->value()); |
4154 XMMRegister xmm_scratch = double_scratch0(); | 4154 XMMRegister xmm_scratch = double_scratch0(); |
4155 Label positive, done, zero; | 4155 Label positive, done, zero; |
4156 __ xorps(xmm_scratch, xmm_scratch); | 4156 __ xorps(xmm_scratch, xmm_scratch); |
4157 __ ucomisd(input_reg, xmm_scratch); | 4157 __ ucomisd(input_reg, xmm_scratch); |
4158 __ j(above, &positive, Label::kNear); | 4158 __ j(above, &positive, Label::kNear); |
4159 __ j(equal, &zero, Label::kNear); | 4159 __ j(not_carry, &zero, Label::kNear); |
4160 ExternalReference nan = | 4160 ExternalReference nan = |
4161 ExternalReference::address_of_canonical_non_hole_nan(); | 4161 ExternalReference::address_of_canonical_non_hole_nan(); |
4162 __ movsd(input_reg, Operand::StaticVariable(nan)); | 4162 __ movsd(input_reg, Operand::StaticVariable(nan)); |
4163 __ jmp(&done, Label::kNear); | 4163 __ jmp(&done, Label::kNear); |
4164 __ bind(&zero); | 4164 __ bind(&zero); |
4165 ExternalReference ninf = | 4165 ExternalReference ninf = |
4166 ExternalReference::address_of_negative_infinity(); | 4166 ExternalReference::address_of_negative_infinity(); |
4167 __ movsd(input_reg, Operand::StaticVariable(ninf)); | 4167 __ movsd(input_reg, Operand::StaticVariable(ninf)); |
4168 __ jmp(&done, Label::kNear); | 4168 __ jmp(&done, Label::kNear); |
4169 __ bind(&positive); | 4169 __ bind(&positive); |
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6363 FixedArray::kHeaderSize - kPointerSize)); | 6363 FixedArray::kHeaderSize - kPointerSize)); |
6364 __ bind(&done); | 6364 __ bind(&done); |
6365 } | 6365 } |
6366 | 6366 |
6367 | 6367 |
6368 #undef __ | 6368 #undef __ |
6369 | 6369 |
6370 } } // namespace v8::internal | 6370 } } // namespace v8::internal |
6371 | 6371 |
6372 #endif // V8_TARGET_ARCH_IA32 | 6372 #endif // V8_TARGET_ARCH_IA32 |
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