Implement ICs for FastDoubleArray loads and stores

src/objects.h

 // Copyright 2011 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 2155 matching lines @@
   inline void set_the_hole(int index);
 
   // Checking for the hole.
   inline bool is_the_hole(int index);
 
   // Garbage collection support.
   inline static int SizeFor(int length) {
     return kHeaderSize + length * kDoubleSize;
   }
 
-  // The following can't be declared inline as const static
-  // because they're 64-bit.
-  static uint64_t kCanonicalNonHoleNanLower32;
-  static uint64_t kCanonicalNonHoleNanInt64;
-  static uint64_t kHoleNanInt64;
-
-  inline static bool is_the_hole_nan(double value) {
-    return BitCast<uint64_t, double>(value) == kHoleNanInt64;
-  }
-
-  inline static double hole_nan_as_double() {
-    return BitCast<double, uint64_t>(kHoleNanInt64);
-  }
-
-  inline static double canonical_not_the_hole_nan_as_double() {
-    return BitCast<double, uint64_t>(kCanonicalNonHoleNanInt64);
-  }
+  inline static bool is_the_hole_nan(double value);
+  inline static double hole_nan_as_double();
+  inline static double canonical_not_the_hole_nan_as_double();
 
   // Casting.
   static inline FixedDoubleArray* cast(Object* obj);
 
   // Maximal allowed size, in bytes, of a single FixedDoubleArray.
   // Prevents overflowing size computations, as well as extreme memory
   // consumption.
   static const int kMaxSize = 512 * MB;
   // Maximally allowed length of a FixedArray.
   static const int kMaxLength = (kMaxSize - kHeaderSize) / kDoubleSize;
@@ skipping 4969 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_