Introduce x87 port

src/x87/codegen-x87.h

Index: src/x87/codegen-x87.h
diff --git a/src/ia32/codegen-ia32.h b/src/x87/codegen-x87.h
similarity index 63%
copy from src/ia32/codegen-ia32.h
copy to src/x87/codegen-x87.h
index eda92b0a8c24542c3a405087a7a9ea459ace0769..abd60a79f400fa613b685fc72f58ee343327a752 100644
--- a/src/ia32/codegen-ia32.h
+++ b/src/x87/codegen-x87.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_IA32_CODEGEN_IA32_H_
-#define V8_IA32_CODEGEN_IA32_H_
+#ifndef V8_X87_CODEGEN_X87_H_
+#define V8_X87_CODEGEN_X87_H_
 
 #include "ast.h"
 #include "ic-inl.h"
@@ -28,20 +28,6 @@ class StringCharLoadGenerator : public AllStatic {
   DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator);
 };
 
-
-class MathExpGenerator : public AllStatic {
- public:
-  static void EmitMathExp(MacroAssembler* masm,
-                          XMMRegister input,
-                          XMMRegister result,
-                          XMMRegister double_scratch,
-                          Register temp1,
-                          Register temp2);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
-};
-
 } }  // namespace v8::internal
 
-#endif  // V8_IA32_CODEGEN_IA32_H_
+#endif  // V8_X87_CODEGEN_X87_H_