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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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/base/adapters.h" | 5 #include "src/base/adapters.h" |
6 #include "src/compiler/instruction-selector-impl.h" | 6 #include "src/compiler/instruction-selector-impl.h" |
7 #include "src/compiler/node-matchers.h" | 7 #include "src/compiler/node-matchers.h" |
8 #include "src/compiler/node-properties.h" | 8 #include "src/compiler/node-properties.h" |
9 | 9 |
10 namespace v8 { | 10 namespace v8 { |
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756 Emit(kIA32Sub, g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)), | 756 Emit(kIA32Sub, g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)), |
757 g.Use(node->InputAt(2))); | 757 g.Use(node->InputAt(2))); |
758 } | 758 } |
759 } | 759 } |
760 | 760 |
761 void InstructionSelector::VisitInt32PairMul(Node* node) { | 761 void InstructionSelector::VisitInt32PairMul(Node* node) { |
762 IA32OperandGenerator g(this); | 762 IA32OperandGenerator g(this); |
763 | 763 |
764 Node* projection1 = NodeProperties::FindProjection(node, 1); | 764 Node* projection1 = NodeProperties::FindProjection(node, 1); |
765 if (projection1) { | 765 if (projection1) { |
766 // InputAt(3) explicitly shares ecx with OutputRegister(1) to save one | 766 Node* lout = node; |
767 // register and one mov instruction. | 767 Node* hout = NodeProperties::FindProjection(node, 1); |
768 InstructionOperand inputs[] = {g.UseUnique(node->InputAt(0)), | 768 int temp1 = g.AllocateVirtualRegister(); |
769 g.UseUnique(node->InputAt(1)), | 769 int temp2 = g.AllocateVirtualRegister(); |
770 g.UseUniqueRegister(node->InputAt(2)), | 770 int temp3 = g.AllocateVirtualRegister(); |
771 g.UseFixed(node->InputAt(3), ecx)}; | 771 int temp4 = g.AllocateVirtualRegister(); |
772 | 772 |
773 InstructionOperand outputs[] = { | 773 Emit(kIA32Imul, g.DefineAsFixedForVreg(temp1, ecx), |
774 g.DefineAsFixed(node, eax), | 774 g.UseFixed(node->InputAt(3), ecx), g.Use(node->InputAt(0))); |
775 g.DefineAsFixed(NodeProperties::FindProjection(node, 1), ecx)}; | 775 Emit(kIA32Imul, g.DefineAsFixedForVreg(temp2, edx), |
| 776 g.UseFixed(node->InputAt(1), edx), g.Use(node->InputAt(2))); |
| 777 Emit(kIA32Add, g.DefineAsFixedForVreg(temp3, ecx), |
| 778 g.UseFixedForVreg(temp2, ecx), g.UseRegisterForVreg(temp1)); |
| 779 InstructionOperand outputs[] = {g.DefineAsFixed(lout, eax), |
| 780 g.DefineAsFixedForVreg(temp4, edx)}; |
| 781 InstructionOperand inputs[] = {g.UseUniqueRegister(node->InputAt(0)), |
| 782 g.UseUniqueRegister(node->InputAt(2))}; |
| 783 Emit(kIA32Umul, 2, outputs, 2, inputs); |
| 784 Emit(kIA32Add, g.DefineAsFixed(hout, ecx), g.UseFixedForVreg(temp3, ecx), |
| 785 g.UseRegisterForVreg(temp4)); |
776 | 786 |
777 InstructionOperand temps[] = {g.TempRegister(edx)}; | |
778 | |
779 Emit(kIA32MulPair, 2, outputs, 4, inputs, 1, temps); | |
780 } else { | 787 } else { |
781 // The high word of the result is not used, so we emit the standard 32 bit | 788 // The high word of the result is not used, so we emit the standard 32 bit |
782 // instruction. | 789 // instruction. |
783 Emit(kIA32Imul, g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)), | 790 Emit(kIA32Imul, g.DefineSameAsFirst(node), g.UseRegister(node->InputAt(0)), |
784 g.Use(node->InputAt(2))); | 791 g.Use(node->InputAt(2))); |
785 } | 792 } |
786 } | 793 } |
787 | 794 |
788 void VisitWord32PairShift(InstructionSelector* selector, InstructionCode opcode, | 795 void VisitWord32PairShift(InstructionSelector* selector, InstructionCode opcode, |
789 Node* node) { | 796 Node* node) { |
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1741 // static | 1748 // static |
1742 MachineOperatorBuilder::AlignmentRequirements | 1749 MachineOperatorBuilder::AlignmentRequirements |
1743 InstructionSelector::AlignmentRequirements() { | 1750 InstructionSelector::AlignmentRequirements() { |
1744 return MachineOperatorBuilder::AlignmentRequirements:: | 1751 return MachineOperatorBuilder::AlignmentRequirements:: |
1745 FullUnalignedAccessSupport(); | 1752 FullUnalignedAccessSupport(); |
1746 } | 1753 } |
1747 | 1754 |
1748 } // namespace compiler | 1755 } // namespace compiler |
1749 } // namespace internal | 1756 } // namespace internal |
1750 } // namespace v8 | 1757 } // namespace v8 |
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