Make SNaN verification universal for all arches.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 2317 matching lines @@
     return array->GetIsolate()->factory()->NewNumber(array->get_scalar(index));
   }
 }
 
 
 void FixedDoubleArray::set(int index, double value) {
   DCHECK(map() != GetHeap()->fixed_cow_array_map() &&
          map() != GetHeap()->fixed_array_map());
   int offset = kHeaderSize + index * kDoubleSize;
   if (std::isnan(value)) {
-    WRITE_UINT64_FIELD(this, offset, V8_UINT64_C(0xFFFFFFFFFFFFFFFF));
+    WRITE_DOUBLE_FIELD(this, offset, std::numeric_limits<double>::quiet_NaN());
   } else {
     WRITE_DOUBLE_FIELD(this, offset, value);
   }
   DCHECK(!is_the_hole(index));
 }
 
 
 void FixedDoubleArray::set_the_hole(int index) {
   DCHECK(map() != GetHeap()->fixed_cow_array_map() &&
          map() != GetHeap()->fixed_array_map());
@@ skipping 5273 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_