Add a kSimd128 machine type for Turbofan.

src/ppc/assembler-ppc.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 273 matching lines @@
 const CRegister cr7 = {7};
 const CRegister cr8 = {8};
 const CRegister cr9 = {9};
 const CRegister cr10 = {10};
 const CRegister cr11 = {11};
 const CRegister cr12 = {12};
 const CRegister cr13 = {13};
 const CRegister cr14 = {14};
 const CRegister cr15 = {15};
 
+// TODO(ppc) Define SIMD registers.
+typedef DoubleRegister Simd128Register;
+
 // -----------------------------------------------------------------------------
 // Machine instruction Operands
 
 #if V8_TARGET_ARCH_PPC64
 const RelocInfo::Mode kRelocInfo_NONEPTR = RelocInfo::NONE64;
 #else
 const RelocInfo::Mode kRelocInfo_NONEPTR = RelocInfo::NONE32;
 #endif
 
 // Class Operand represents a shifter operand in data processing instructions
@@ skipping 1171 matching lines @@
 
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_ASSEMBLER_PPC_H_