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

src/compiler/x64/code-generator-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include <limits>
 
 #include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 2135 matching lines @@
       Operand operand = i.MemoryOperand(&index);
       __ xchgw(i.InputRegister(index), operand);
       break;
     }
     case kX64Xchgl: {
       size_t index = 0;
       Operand operand = i.MemoryOperand(&index);
       __ xchgl(i.InputRegister(index), operand);
       break;
     }
-    case kX64Int32x4Create: {
+    case kX64Int32x4Splat: {
       CpuFeatureScope sse_scope(masm(), SSE4_1);
       XMMRegister dst = i.OutputSimd128Register();
       __ Movd(dst, i.InputRegister(0));
       __ shufps(dst, dst, 0x0);
       break;
     }
     case kX64Int32x4ExtractLane: {
       CpuFeatureScope sse_scope(masm(), SSE4_1);
       __ Pextrd(i.OutputRegister(), i.InputSimd128Register(0), i.InputInt8(1));
       break;
@@ skipping 11 matching lines @@
     case kX64Int32x4Add: {
       CpuFeatureScope sse_scope(masm(), SSE4_1);
       __ paddd(i.OutputSimd128Register(), i.InputSimd128Register(1));
       break;
     }
     case kX64Int32x4Sub: {
       CpuFeatureScope sse_scope(masm(), SSE4_1);
       __ psubd(i.OutputSimd128Register(), i.InputSimd128Register(1));
       break;
     }
+    case kX64Simd128Zero: {
+      CpuFeatureScope sse_scope(masm(), SSE4_1);
+      XMMRegister dst = i.OutputSimd128Register();
+      __ xorps(dst, dst);
+      break;
+    }
     case kCheckedLoadInt8:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movsxbl);
       break;
     case kCheckedLoadUint8:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movzxbl);
       break;
     case kCheckedLoadInt16:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movsxwl);
       break;
     case kCheckedLoadUint16:
@@ skipping 662 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8