PPC: Remove register index/code indirection

src/ppc/constants-ppc.h

 // Copyright 2014 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_PPC_CONSTANTS_PPC_H_
 #define V8_PPC_CONSTANTS_PPC_H_
 
 #include <stdint.h>
 
 #include "src/base/logging.h"
 #include "src/base/macros.h"
 #include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
 // Number of registers
 const int kNumRegisters = 32;
 
 // FP support.
-const int kNumFPDoubleRegisters = 32;
-const int kNumFPRegisters = kNumFPDoubleRegisters;
+const int kNumDoubleRegisters = 32;
 
 const int kNoRegister = -1;
 
 // Used in embedded constant pool builder - max reach in bits for
 // various load instructions (one less due to unsigned)
 const int kLoadPtrMaxReachBits = 15;
 const int kLoadDoubleMaxReachBits = 15;
 
 // sign-extend the least significant 16-bits of value <imm>
 #define SIGN_EXT_IMM16(imm) ((static_cast<int>(imm) << 16) >> 16)
@@ skipping 524 matching lines @@
 
  private:
   // We need to prevent the creation of instances of class Instruction.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instruction);
 };
 
 
 // Helper functions for converting between register numbers and names.
 class Registers {
  public:
-  // Return the name of the register.
-  static const char* Name(int reg);
-
-  // Lookup the register number for the name provided.
-  static int Number(const char* name);
-
-  struct RegisterAlias {
-    int reg;
-    const char* name;
-  };
-
- private:
-  static const char* names_[kNumRegisters];
-  static const RegisterAlias aliases_[];
-};
-
-// Helper functions for converting between FP register numbers and names.
-class FPRegisters {
- public:
-  // Return the name of the register.
-  static const char* Name(int reg);
-
   // Lookup the register number for the name provided.
   static int Number(const char* name);
 
  private:
-  static const char* names_[kNumFPRegisters];
+  static const char* names_[kNumRegisters];
+};
+
+// Helper functions for converting between FP register numbers and names.
+class DoubleRegisters {
+ public:
+  // Lookup the register number for the name provided.
+  static int Number(const char* name);
+
+ private:
+  static const char* names_[kNumDoubleRegisters];
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_CONSTANTS_PPC_H_