First draft of the sh4 port

src/sh4/codegen-sh4.h

Index: src/sh4/codegen-sh4.h
diff --git a/src/arm/codegen-arm.h b/src/sh4/codegen-sh4.h
similarity index 95%
copy from src/arm/codegen-arm.h
copy to src/sh4/codegen-sh4.h
index c340e6b1083bd1cb39c1c56490222242331dc01a..39f94e053ee507c558f8dc05468e5a272e498a21 100644
--- a/src/arm/codegen-arm.h
+++ b/src/sh4/codegen-sh4.h
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2011-2012 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:
@@ -25,8 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_ARM_CODEGEN_ARM_H_
-#define V8_ARM_CODEGEN_ARM_H_
+#ifndef V8_SH4_CODEGEN_SH4_H_
+#define V8_SH4_CODEGEN_SH4_H_
 
 #include "ast.h"
 #include "ic-inl.h"
@@ -90,4 +90,4 @@ class StringCharLoadGenerator : public AllStatic {
 
 } }  // namespace v8::internal
 
-#endif  // V8_ARM_CODEGEN_ARM_H_
+#endif  // V8_SH4_CODEGEN_SH4_H_