Faster implementation of Math.exp()

src/x64/codegen-x64.h

Index: src/x64/codegen-x64.h
diff --git a/src/x64/codegen-x64.h b/src/x64/codegen-x64.h
index 5d8bbfff4c676399550f375bb26e87e6e793e437..73438d75db2fc74cd86ffea129ab7af953246c51 100644
--- a/src/x64/codegen-x64.h
+++ b/src/x64/codegen-x64.h
@@ -86,6 +86,20 @@ 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_X64_CODEGEN_X64_H_