Add a kSimd128 machine type for Turbofan.

src/arm64/assembler-arm64.h

 // 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.
 
 #ifndef V8_ARM64_ASSEMBLER_ARM64_H_
 #define V8_ARM64_ASSEMBLER_ARM64_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 351 matching lines @@
                         const CPURegister& reg3 = NoCPUReg,
                         const CPURegister& reg4 = NoCPUReg,
                         const CPURegister& reg5 = NoCPUReg,
                         const CPURegister& reg6 = NoCPUReg,
                         const CPURegister& reg7 = NoCPUReg,
                         const CPURegister& reg8 = NoCPUReg);
 
 
 typedef FPRegister DoubleRegister;
 
+// TODO(arm64) Define SIMD registers.
+typedef FPRegister Simd128Register;
 
 // -----------------------------------------------------------------------------
 // Lists of registers.
 class CPURegList {
  public:
   explicit CPURegList(CPURegister reg1,
                       CPURegister reg2 = NoCPUReg,
                       CPURegister reg3 = NoCPUReg,
                       CPURegister reg4 = NoCPUReg)
       : list_(reg1.Bit() | reg2.Bit() | reg3.Bit() | reg4.Bit()),
@@ skipping 1803 matching lines @@
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBufferSpace();
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARM64_ASSEMBLER_ARM64_H_