[wasm] Implement I32x4ReplaceLane, I32x4Add, I32x4Sub.

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index bfe7c6264986e19f0b57dd87cdbe9ea5abc231a2..a4bb9da5f2ff134f51e162fd4861b2eff6bbfdd9 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -2265,6 +2265,25 @@ void InstructionSelector::VisitInt32x4ExtractLane(Node* node) {
        g.UseRegister(node->InputAt(0)), g.UseImmediate(node->InputAt(1)));
 }
 
+void InstructionSelector::VisitInt32x4ReplaceLane(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Int32x4ReplaceLane, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseImmediate(node->InputAt(1)),
+       g.Use(node->InputAt(2)));
+}
+
+void InstructionSelector::VisitInt32x4Add(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Int32x4Add, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
+}
+
+void InstructionSelector::VisitInt32x4Sub(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Int32x4Sub, g.DefineAsRegister(node),

[titzer, 2016/10/07 12:20:14]

As mentioned offline, these will have to be DefineSameAsFirst.

[gdeepti, 2016/11/22 01:15:20]

Done.

+       g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
+}
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {