First draft of the sh4 port

src/codegen.h

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 59 matching lines @@
 enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 
 #if V8_TARGET_ARCH_IA32
 #include "ia32/codegen-ia32.h"
 #elif V8_TARGET_ARCH_X64
 #include "x64/codegen-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/codegen-arm.h"
 #elif V8_TARGET_ARCH_MIPS
 #include "mips/codegen-mips.h"
+#elif V8_TARGET_ARCH_SH4
+#include "sh4/codegen-sh4.h"
 #else
 #error Unsupported target architecture.
 #endif
 
 namespace v8 {
 namespace internal {
 
 // Results of the library implementation of transcendental functions may differ
 // from the one we use in our generated code.  Therefore we use the same
 // generated code both in runtime and compiled code.
 typedef double (*UnaryMathFunction)(double x);
 
 UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type);
 UnaryMathFunction CreateSqrtFunction();
 
 
 class ElementsTransitionGenerator : public AllStatic {
  public:
   static void GenerateMapChangeElementsTransition(MacroAssembler* masm);
   static void GenerateSmiToDouble(MacroAssembler* masm, Label* fail);
   static void GenerateDoubleToObject(MacroAssembler* masm, Label* fail);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_