A bunch of changes to speed up math on ARM....

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 1144 matching lines @@
   // Dispatched behavior.
   Object* HeapNumberToBoolean();
   void HeapNumberPrint();
   void HeapNumberPrint(StringStream* accumulator);
 #ifdef DEBUG
   void HeapNumberVerify();
 #endif
 
   // 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.  This is the ordering on a
+  // little endian machine with little endian double word ordering.
+  static const int kMantissaOffset = kValueOffset;
+  static const int kExponentOffset = kValueOffset + 4;
   static const int kSize = kValueOffset + kDoubleSize;
 
+  static const uint32_t kSignMask = 0x80000000u;
+  static const uint32_t kExponentMask = 0x7ff00000u;
+  static const uint32_t kMantissaMask = 0xfffffu;
+  static const int kExponentBias = 1023;
+  static const int kExponentShift = 20;
+  static const int kMantissaBitsInTopWord = 20;
+  static const int kNonMantissaBitsInTopWord = 12;
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(HeapNumber);
 };
 
 
 // The JSObject describes real heap allocated JavaScript objects with
 // properties.
 // Note that the map of JSObject changes during execution to enable inline
 // caching.
 class JSObject: public HeapObject {
@@ skipping 3247 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_