[V8] Rename SIMD Create methods and add initialization operators.

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 7abdd9096ce464b4c77beb6732b80a9d08b6f3f3..44eadb1ee78670f2199d4152ebb7a6cdd588c723 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -2274,9 +2274,9 @@ void InstructionSelector::VisitAtomicStore(Node* node) {
   Emit(code, 0, static_cast<InstructionOperand*>(nullptr), input_count, inputs);
 }
 
-void InstructionSelector::VisitCreateInt32x4(Node* node) {
+void InstructionSelector::VisitInt32x4Splat(Node* node) {
   X64OperandGenerator g(this);
-  Emit(kX64Int32x4Create, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
+  Emit(kX64Int32x4Splat, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }
 
 void InstructionSelector::VisitInt32x4ExtractLane(Node* node) {
@@ -2306,6 +2306,26 @@ void InstructionSelector::VisitInt32x4Sub(Node* node) {
        g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
 }
 
+void InstructionSelector::VisitSimd128Zero(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Simd128Zero, g.DefineSameAsFirst(node));
+}
+
+void InstructionSelector::VisitSimd1x4Zero(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Simd128Zero, g.DefineSameAsFirst(node));
+}
+
+void InstructionSelector::VisitSimd1x8Zero(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Simd128Zero, g.DefineSameAsFirst(node));
+}
+
+void InstructionSelector::VisitSimd1x16Zero(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kX64Simd128Zero, g.DefineSameAsFirst(node));
+}
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {