Change Math.random() to return 32 bits of random goodness, instead of 30 rand...

src/x64/codegen-x64.h

 // Copyright 2010 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 550 matching lines @@
   void GenerateCharFromCode(ZoneList<Expression*>* args);
 
   // Fast support for object equality testing.
   void GenerateObjectEquals(ZoneList<Expression*>* args);
 
   void GenerateLog(ZoneList<Expression*>* args);
 
   void GenerateGetFramePointer(ZoneList<Expression*>* args);
 
   // Fast support for Math.random().
-  void GenerateRandomPositiveSmi(ZoneList<Expression*>* args);
+  void GenerateRandomHeapNumber(ZoneList<Expression*>* args);
 
   // Fast support for StringAdd.
   void GenerateStringAdd(ZoneList<Expression*>* args);
 
   // Fast support for SubString.
   void GenerateSubString(ZoneList<Expression*>* args);
 
   // Fast support for StringCompare.
   void GenerateStringCompare(ZoneList<Expression*>* args);
 
@@ skipping 358 matching lines @@
   void Print() {
     PrintF("NumberToStringStub\n");
   }
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_