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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/crankshaft/mips64/lithium-codegen-mips64.h" | 5 #include "src/crankshaft/mips64/lithium-codegen-mips64.h" |
6 | 6 |
7 #include "src/code-factory.h" | 7 #include "src/code-factory.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/crankshaft/hydrogen-osr.h" | 9 #include "src/crankshaft/hydrogen-osr.h" |
10 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h" | 10 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h" |
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3642 DoubleRegister result = ToDoubleRegister(instr->result()); | 3642 DoubleRegister result = ToDoubleRegister(instr->result()); |
3643 DoubleRegister temp = ToDoubleRegister(instr->temp()); | 3643 DoubleRegister temp = ToDoubleRegister(instr->temp()); |
3644 | 3644 |
3645 DCHECK(!input.is(result)); | 3645 DCHECK(!input.is(result)); |
3646 | 3646 |
3647 // Note that according to ECMA-262 15.8.2.13: | 3647 // Note that according to ECMA-262 15.8.2.13: |
3648 // Math.pow(-Infinity, 0.5) == Infinity | 3648 // Math.pow(-Infinity, 0.5) == Infinity |
3649 // Math.sqrt(-Infinity) == NaN | 3649 // Math.sqrt(-Infinity) == NaN |
3650 Label done; | 3650 Label done; |
3651 __ Move(temp, static_cast<double>(-V8_INFINITY)); | 3651 __ Move(temp, static_cast<double>(-V8_INFINITY)); |
| 3652 // Set up Infinity. |
3652 __ Neg_d(result, temp); | 3653 __ Neg_d(result, temp); |
| 3654 // result is overwritten if the branch is not taken. |
3653 __ BranchF(&done, NULL, eq, temp, input); | 3655 __ BranchF(&done, NULL, eq, temp, input); |
3654 | 3656 |
3655 // Add +0 to convert -0 to +0. | 3657 // Add +0 to convert -0 to +0. |
3656 __ add_d(result, input, kDoubleRegZero); | 3658 __ add_d(result, input, kDoubleRegZero); |
3657 __ sqrt_d(result, result); | 3659 __ sqrt_d(result, result); |
3658 __ bind(&done); | 3660 __ bind(&done); |
3659 } | 3661 } |
3660 | 3662 |
3661 | 3663 |
3662 void LCodeGen::DoPower(LPower* instr) { | 3664 void LCodeGen::DoPower(LPower* instr) { |
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5741 __ ld(result, FieldMemOperand(scratch, | 5743 __ ld(result, FieldMemOperand(scratch, |
5742 FixedArray::kHeaderSize - kPointerSize)); | 5744 FixedArray::kHeaderSize - kPointerSize)); |
5743 __ bind(deferred->exit()); | 5745 __ bind(deferred->exit()); |
5744 __ bind(&done); | 5746 __ bind(&done); |
5745 } | 5747 } |
5746 | 5748 |
5747 #undef __ | 5749 #undef __ |
5748 | 5750 |
5749 } // namespace internal | 5751 } // namespace internal |
5750 } // namespace v8 | 5752 } // namespace v8 |
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