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| 1 // Copyright 2012 the V8 project authors. All rights reserved.7 | 1 // Copyright 2012 the V8 project authors. All rights reserved.7 |
| 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 |
| 11 // with the distribution. | 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its | 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived | 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. | 14 // from this software without specific prior written permission. |
| 15 // | 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | 27 |
| 28 #include <limits> | |
| 29 | |
| 30 #include "src/v8.h" | 28 #include "src/v8.h" |
| 31 | 29 |
| 32 #include "src/base/bits.h" | 30 #include "src/base/bits.h" |
| 33 #include "src/code-factory.h" | 31 #include "src/code-factory.h" |
| 34 #include "src/code-stubs.h" | 32 #include "src/code-stubs.h" |
| 35 #include "src/hydrogen-osr.h" | 33 #include "src/hydrogen-osr.h" |
| 36 #include "src/ic/ic.h" | 34 #include "src/ic/ic.h" |
| 37 #include "src/ic/stub-cache.h" | 35 #include "src/ic/stub-cache.h" |
| 38 #include "src/mips/lithium-codegen-mips.h" | 36 #include "src/mips/lithium-codegen-mips.h" |
| 39 #include "src/mips/lithium-gap-resolver-mips.h" | 37 #include "src/mips/lithium-gap-resolver-mips.h" |
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| 3837 DoubleRegister input = ToDoubleRegister(instr->value()); | 3835 DoubleRegister input = ToDoubleRegister(instr->value()); |
| 3838 DoubleRegister result = ToDoubleRegister(instr->result()); | 3836 DoubleRegister result = ToDoubleRegister(instr->result()); |
| 3839 DoubleRegister temp = ToDoubleRegister(instr->temp()); | 3837 DoubleRegister temp = ToDoubleRegister(instr->temp()); |
| 3840 | 3838 |
| 3841 DCHECK(!input.is(result)); | 3839 DCHECK(!input.is(result)); |
| 3842 | 3840 |
| 3843 // Note that according to ECMA-262 15.8.2.13: | 3841 // Note that according to ECMA-262 15.8.2.13: |
| 3844 // Math.pow(-Infinity, 0.5) == Infinity | 3842 // Math.pow(-Infinity, 0.5) == Infinity |
| 3845 // Math.sqrt(-Infinity) == NaN | 3843 // Math.sqrt(-Infinity) == NaN |
| 3846 Label done; | 3844 Label done; |
| 3847 __ Move(temp, std::numeric_limits<double>::infinity()); | 3845 __ Move(temp, static_cast<double>(-V8_INFINITY)); |
| 3848 __ BranchF(USE_DELAY_SLOT, &done, NULL, eq, temp, input); | 3846 __ BranchF(USE_DELAY_SLOT, &done, NULL, eq, temp, input); |
| 3849 // Set up Infinity in the delay slot. | 3847 // Set up Infinity in the delay slot. |
| 3850 // result is overwritten if the branch is not taken. | 3848 // result is overwritten if the branch is not taken. |
| 3851 __ neg_d(result, temp); | 3849 __ neg_d(result, temp); |
| 3852 | 3850 |
| 3853 // Add +0 to convert -0 to +0. | 3851 // Add +0 to convert -0 to +0. |
| 3854 __ add_d(result, input, kDoubleRegZero); | 3852 __ add_d(result, input, kDoubleRegZero); |
| 3855 __ sqrt_d(result, result); | 3853 __ sqrt_d(result, result); |
| 3856 __ bind(&done); | 3854 __ bind(&done); |
| 3857 } | 3855 } |
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| 5963 __ li(at, scope_info); | 5961 __ li(at, scope_info); |
| 5964 __ Push(at, ToRegister(instr->function())); | 5962 __ Push(at, ToRegister(instr->function())); |
| 5965 CallRuntime(Runtime::kPushBlockContext, 2, instr); | 5963 CallRuntime(Runtime::kPushBlockContext, 2, instr); |
| 5966 RecordSafepoint(Safepoint::kNoLazyDeopt); | 5964 RecordSafepoint(Safepoint::kNoLazyDeopt); |
| 5967 } | 5965 } |
| 5968 | 5966 |
| 5969 | 5967 |
| 5970 #undef __ | 5968 #undef __ |
| 5971 | 5969 |
| 5972 } } // namespace v8::internal | 5970 } } // namespace v8::internal |
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