Add Wasm SIMD opcodes.

src/compiler/wasm-linkage.cc

 // Copyright 2015 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/assembler.h"
 #include "src/macro-assembler.h"
 
 #include "src/wasm/wasm-module.h"
 
 #include "src/compiler/linkage.h"
@@ skipping 13 matching lines @@
 MachineType MachineTypeFor(LocalType type) {
   switch (type) {
     case kAstI32:
       return MachineType::Int32();
     case kAstI64:
       return MachineType::Int64();
     case kAstF64:
       return MachineType::Float64();
     case kAstF32:
       return MachineType::Float32();
+    case kAstS128:
+      return MachineType::Simd128();
     default:
       UNREACHABLE();
       return MachineType::AnyTagged();
   }
 }
 
 
 // Platform-specific configuration for C calling convention.
 LinkageLocation regloc(Register reg) {
   return LinkageLocation::ForRegister(reg.code());
@@ skipping 333 matching lines @@
       descriptor->CalleeSavedFPRegisters(),  // callee-saved fp regs
       descriptor->flags(),                   // flags
       descriptor->debug_name());
 
   return descriptor;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8