Contribution of PowerPC port.

src/ppc/codegen-ppc.h

 // Copyright 2011 the V8 project authors. All rights reserved.
+//
+// Copyright IBM Corp. 2012, 2013. 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_MIPS_CODEGEN_MIPS_H_
-#define V8_MIPS_CODEGEN_MIPS_H_
-
+#ifndef V8_PPC_CODEGEN_PPC_H_
+#define V8_PPC_CODEGEN_PPC_H_
 
 #include "src/ast.h"
 #include "src/ic-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
 enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 
 
 class StringCharLoadGenerator : public AllStatic {
  public:
   // Generates the code for handling different string types and loading the
   // indexed character into |result|.  We expect |index| as untagged input and
   // |result| as untagged output.
   static void Generate(MacroAssembler* masm,
                        Register string,
                        Register index,
                        Register result,
                        Label* call_runtime);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator);
 };
 
-
 class MathExpGenerator : public AllStatic {
  public:
   // Register input isn't modified. All other registers are clobbered.
   static void EmitMathExp(MacroAssembler* masm,
                           DoubleRegister input,
                           DoubleRegister result,
                           DoubleRegister double_scratch1,
                           DoubleRegister double_scratch2,
                           Register temp1,
                           Register temp2,
                           Register temp3);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_MIPS_CODEGEN_MIPS_H_
+#endif  // V8_PPC_CODEGEN_PPC_H_