Improve Math.round(). Fix the bug in r4146. Further improve performance by ch...

src/objects.h

 // Copyright 2006-2009 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 1076 matching lines @@
   static inline HeapNumber* cast(Object* obj);
 
   // Dispatched behavior.
   Object* HeapNumberToBoolean();
   void HeapNumberPrint();
   void HeapNumberPrint(StringStream* accumulator);
 #ifdef DEBUG
   void HeapNumberVerify();
 #endif
 
+  inline int get_exponent();
+  inline int get_sign();
+
   // Layout description.
   static const int kValueOffset = HeapObject::kHeaderSize;
   // IEEE doubles are two 32 bit words.  The first is just mantissa, the second
   // is a mixture of sign, exponent and mantissa.  Our current platforms are all
   // little endian apart from non-EABI arm which is little endian with big
   // endian floating point word ordering!
 #if !defined(V8_HOST_ARCH_ARM) || defined(USE_ARM_EABI)
   static const int kMantissaOffset = kValueOffset;
   static const int kExponentOffset = kValueOffset + 4;
 #else
@@ skipping 3982 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_