[wasm] Add native x64 implementations for I32x4Splat, I32x4ExtractLane

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 798d438e25074e8b3c48e45f8aea6bebd61a2f06..bd9fcde9321cee584a920d27960039e73ca845ed 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -2213,6 +2213,17 @@ void InstructionSelector::VisitAtomicStore(Node* node) {
   Emit(code, 0, static_cast<InstructionOperand*>(nullptr), input_count, inputs);
 }
 
+void InstructionSelector::VisitCreateInt32x4(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Int32x4Create, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
+}
+
+void InstructionSelector::VisitInt32x4ExtractLane(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Int32x4ExtractLane, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseImmediate(node->InputAt(1)));
+}
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {