A64: Synchronize with r18444.

src/v8globals.h

 // Copyright 2012 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 304 matching lines @@
 typedef void (*StoreBufferCallback)(Heap* heap,
                                     MemoryChunk* page,
                                     StoreBufferEvent event);
 
 
 // Union used for fast testing of specific double values.
 union DoubleRepresentation {
   double  value;
   int64_t bits;
   DoubleRepresentation(double x) { value = x; }
+  bool operator==(const DoubleRepresentation& other) const {
+    return bits == other.bits;
+  }
 };
 
 
 // Union used for customized checking of the IEEE double types
 // inlined within v8 runtime, rather than going to the underlying
 // platform headers and libraries
 union IeeeDoubleLittleEndianArchType {
   double d;
   struct {
     unsigned int man_low  :32;
@@ skipping 236 matching lines @@
 
 
 enum MinusZeroMode {
   TREAT_MINUS_ZERO_AS_ZERO,
   FAIL_ON_MINUS_ZERO
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8GLOBALS_H_