Ensure consistent result of transcendental functions.

src/codegen.h

 // Copyright 2011 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 66 matching lines @@
 #include "arm/codegen-arm.h"
 #elif V8_TARGET_ARCH_MIPS
 #include "mips/codegen-mips.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 (*TranscendentalFunction)(double x);
+
+TranscendentalFunction CreateTranscendentalFunction(
+    TranscendentalCache::Type type);
+
+
 class ElementsTransitionGenerator : public AllStatic {
  public:
   static void GenerateSmiOnlyToObject(MacroAssembler* masm);
   static void GenerateSmiOnlyToDouble(MacroAssembler* masm, Label* fail);
   static void GenerateDoubleToObject(MacroAssembler* masm, Label* fail);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_