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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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2691 EmitIntegerMathAbs(instr); | 2691 EmitIntegerMathAbs(instr); |
2692 __ bind(deferred->exit()); | 2692 __ bind(deferred->exit()); |
2693 } | 2693 } |
2694 } | 2694 } |
2695 | 2695 |
2696 | 2696 |
2697 void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) { | 2697 void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) { |
2698 XMMRegister xmm_scratch = xmm0; | 2698 XMMRegister xmm_scratch = xmm0; |
2699 Register output_reg = ToRegister(instr->result()); | 2699 Register output_reg = ToRegister(instr->result()); |
2700 XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0)); | 2700 XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0)); |
2701 __ xorpd(xmm_scratch, xmm_scratch); // Zero the register. | |
2702 __ ucomisd(input_reg, xmm_scratch); | |
2703 | 2701 |
2704 if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { | 2702 if (CpuFeatures::IsSupported(SSE4_1)) { |
2705 DeoptimizeIf(below_equal, instr->environment()); | 2703 CpuFeatures::Scope scope(SSE4_1); |
| 2704 if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 2705 // Deoptimize if minus zero. |
| 2706 __ movq(output_reg, input_reg); |
| 2707 __ subq(output_reg, Immediate(1)); |
| 2708 DeoptimizeIf(overflow, instr->environment()); |
| 2709 } |
| 2710 __ roundsd(xmm_scratch, input_reg, Assembler::kRoundDown); |
| 2711 __ cvttsd2si(output_reg, xmm_scratch); |
| 2712 __ cmpl(output_reg, Immediate(0x80000000)); |
| 2713 DeoptimizeIf(equal, instr->environment()); |
2706 } else { | 2714 } else { |
2707 DeoptimizeIf(below, instr->environment()); | 2715 __ xorpd(xmm_scratch, xmm_scratch); // Zero the register. |
| 2716 __ ucomisd(input_reg, xmm_scratch); |
| 2717 |
| 2718 if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 2719 DeoptimizeIf(below_equal, instr->environment()); |
| 2720 } else { |
| 2721 DeoptimizeIf(below, instr->environment()); |
| 2722 } |
| 2723 |
| 2724 // Use truncating instruction (OK because input is positive). |
| 2725 __ cvttsd2si(output_reg, input_reg); |
| 2726 |
| 2727 // Overflow is signalled with minint. |
| 2728 __ cmpl(output_reg, Immediate(0x80000000)); |
| 2729 DeoptimizeIf(equal, instr->environment()); |
2708 } | 2730 } |
2709 | |
2710 // Use truncating instruction (OK because input is positive). | |
2711 __ cvttsd2si(output_reg, input_reg); | |
2712 | |
2713 // Overflow is signalled with minint. | |
2714 __ cmpl(output_reg, Immediate(0x80000000)); | |
2715 DeoptimizeIf(equal, instr->environment()); | |
2716 } | 2731 } |
2717 | 2732 |
2718 | 2733 |
2719 void LCodeGen::DoMathRound(LUnaryMathOperation* instr) { | 2734 void LCodeGen::DoMathRound(LUnaryMathOperation* instr) { |
2720 const XMMRegister xmm_scratch = xmm0; | 2735 const XMMRegister xmm_scratch = xmm0; |
2721 Register output_reg = ToRegister(instr->result()); | 2736 Register output_reg = ToRegister(instr->result()); |
2722 XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0)); | 2737 XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0)); |
2723 | 2738 |
2724 Label done; | 2739 Label done; |
2725 // xmm_scratch = 0.5 | 2740 // xmm_scratch = 0.5 |
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4006 RegisterEnvironmentForDeoptimization(environment); | 4021 RegisterEnvironmentForDeoptimization(environment); |
4007 ASSERT(osr_pc_offset_ == -1); | 4022 ASSERT(osr_pc_offset_ == -1); |
4008 osr_pc_offset_ = masm()->pc_offset(); | 4023 osr_pc_offset_ = masm()->pc_offset(); |
4009 } | 4024 } |
4010 | 4025 |
4011 #undef __ | 4026 #undef __ |
4012 | 4027 |
4013 } } // namespace v8::internal | 4028 } } // namespace v8::internal |
4014 | 4029 |
4015 #endif // V8_TARGET_ARCH_X64 | 4030 #endif // V8_TARGET_ARCH_X64 |
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