diff --git a/src/codegen.h b/src/codegen.h
index e551abf..50d70f2 100644
--- a/src/codegen.h
+++ b/src/codegen.h
@@ -81,4 +81,28 @@
 #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 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_