Version 3.3.2....

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 7683)
+++ src/objects-inl.h	(working copy)
@@ -406,6 +406,13 @@
 }
 
 
+bool Object::IsExternalDoubleArray() {
+  return Object::IsHeapObject() &&
+      HeapObject::cast(this)->map()->instance_type() ==
+      EXTERNAL_DOUBLE_ARRAY_TYPE;
+}
+
+
 bool MaybeObject::IsFailure() {
   return HAS_FAILURE_TAG(this);
 }
@@ -1901,6 +1908,7 @@
 CAST_ACCESSOR(ExternalIntArray)
 CAST_ACCESSOR(ExternalUnsignedIntArray)
 CAST_ACCESSOR(ExternalFloatArray)
+CAST_ACCESSOR(ExternalDoubleArray)
 CAST_ACCESSOR(ExternalPixelArray)
 CAST_ACCESSOR(Struct)
 
@@ -2315,6 +2323,20 @@
 }
 
 
+double ExternalDoubleArray::get(int index) {
+  ASSERT((index >= 0) && (index < this->length()));
+  double* ptr = static_cast<double*>(external_pointer());
+  return ptr[index];
+}
+
+
+void ExternalDoubleArray::set(int index, double value) {
+  ASSERT((index >= 0) && (index < this->length()));
+  double* ptr = static_cast<double*>(external_pointer());
+  ptr[index] = value;
+}
+
+
 int Map::visitor_id() {
   return READ_BYTE_FIELD(this, kVisitorIdOffset);
 }
@@ -2515,6 +2537,12 @@
 }
 
 
+FixedArray* Map::unchecked_prototype_transitions() {
+  return reinterpret_cast<FixedArray*>(
+      READ_FIELD(this, kPrototypeTransitionsOffset));
+}
+
+
 Code::Flags Code::flags() {
   return static_cast<Flags>(READ_INT_FIELD(this, kFlagsOffset));
 }
@@ -2923,6 +2951,7 @@
 ACCESSORS(Map, instance_descriptors, DescriptorArray,
           kInstanceDescriptorsOffset)
 ACCESSORS(Map, code_cache, Object, kCodeCacheOffset)
+ACCESSORS(Map, prototype_transitions, FixedArray, kPrototypeTransitionsOffset)
 ACCESSORS(Map, constructor, Object, kConstructorOffset)
 
 ACCESSORS(JSFunction, shared, SharedFunctionInfo, kSharedFunctionInfoOffset)
@@ -3638,14 +3667,18 @@
         return EXTERNAL_INT_ELEMENTS;
       case EXTERNAL_UNSIGNED_INT_ARRAY_TYPE:
         return EXTERNAL_UNSIGNED_INT_ELEMENTS;
+      case EXTERNAL_FLOAT_ARRAY_TYPE:
+        return EXTERNAL_FLOAT_ELEMENTS;
+      case EXTERNAL_DOUBLE_ARRAY_TYPE:
+        return EXTERNAL_DOUBLE_ELEMENTS;
       case EXTERNAL_PIXEL_ARRAY_TYPE:
         return EXTERNAL_PIXEL_ELEMENTS;
       default:
         break;
     }
   }
-  ASSERT(array->map()->instance_type() == EXTERNAL_FLOAT_ARRAY_TYPE);
-  return EXTERNAL_FLOAT_ELEMENTS;
+  UNREACHABLE();
+  return DICTIONARY_ELEMENTS;
 }
 
 
@@ -3686,6 +3719,8 @@
                         EXTERNAL_UNSIGNED_INT_ARRAY_TYPE)
 EXTERNAL_ELEMENTS_CHECK(Float,
                         EXTERNAL_FLOAT_ARRAY_TYPE)
+EXTERNAL_ELEMENTS_CHECK(Double,
+                        EXTERNAL_DOUBLE_ARRAY_TYPE)
 EXTERNAL_ELEMENTS_CHECK(Pixel, EXTERNAL_PIXEL_ARRAY_TYPE)