Faster implementation of Math.exp()

src/x64/codegen-x64.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 68 matching lines @@
   static void Generate(MacroAssembler* masm,
                        Register string,
                        Register index,
                        Register result,
                        Label* call_runtime);
 
  private:
   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_