Implement %TypedArray%.prototype.sort

src/array.js

 // 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.
 
 var $arrayConcat;
 var $arrayJoin;
 var $arrayPush;
 var $arrayPop;
 var $arrayShift;
 var $arraySlice;
 var $arraySplice;
 var $arrayUnshift;
 var $innerArrayForEach;
 var $innerArrayEvery;
+var $innerArraySort;
 
 (function(global, shared, exports) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
@@ skipping 829 matching lines @@
   while (arguments_index < arguments_length) {
     array[i++] = %_Arguments(arguments_index++);
   }
   array.length = len - del_count + num_elements_to_add;
 
   // Return the deleted elements.
   return deleted_elements;
 }
 
 
-function ArraySort(comparefn) {
-  CHECK_OBJECT_COERCIBLE(this, "Array.prototype.sort");
-
+function InnerArraySort(length, comparefn) {
   // In-place QuickSort algorithm.
   // For short (length <= 22) arrays, insertion sort is used for efficiency.
 
   if (!IS_SPEC_FUNCTION(comparefn)) {
     comparefn = function (x, y) {
       if (x === y) return 0;
       if (%_IsSmi(x) && %_IsSmi(y)) {
         return %SmiLexicographicCompare(x, y);
       }
       x = $toString(x);
@@ skipping 224 matching lines @@
         obj[i] = UNDEFINED;
       } else {
         delete obj[i];
       }
     }
 
     // Return the number of defined elements.
     return first_undefined;
   };
 
-  var length = TO_UINT32(this.length);
   if (length < 2) return this;
 
   var is_array = IS_ARRAY(this);
   var max_prototype_element;
   if (!is_array) {
     // For compatibility with JSC, we also sort elements inherited from
     // the prototype chain on non-Array objects.
     // We do this by copying them to this object and sorting only
     // own elements. This is not very efficient, but sorting with
     // inherited elements happens very, very rarely, if at all.
@@ skipping 18 matching lines @@
   if (!is_array && (num_non_undefined + 1 < max_prototype_element)) {
     // For compatibility with JSC, we shadow any elements in the prototype
     // chain that has become exposed by sort moving a hole to its position.
     ShadowPrototypeElements(this, num_non_undefined, max_prototype_element);
   }
 
   return this;
 }
 
 
+function ArraySort(comparefn) {
+  CHECK_OBJECT_COERCIBLE(this, "Array.prototype.sort");
+
+  var length = TO_UINT32(this.length);
+  return %_CallFunction(this, length, comparefn, InnerArraySort);
+}
+
+
 // The following functions cannot be made efficient on sparse arrays while
 // preserving the semantics, since the calls to the receiver function can add
 // or delete elements from the array.
 function ArrayFilter(f, receiver) {
   CHECK_OBJECT_COERCIBLE(this, "Array.prototype.filter");
 
   // Pull out the length so that modifications to the length in the
   // loop will not affect the looping and side effects are visible.
   var array = $toObject(this);
   var length = $toUint32(array.length);
@@ skipping 442 matching lines @@
 $arrayJoin = ArrayJoin;
 $arrayPush = ArrayPush;
 $arrayPop = ArrayPop;
 $arrayShift = ArrayShift;
 $arraySlice = ArraySlice;
 $arraySplice = ArraySplice;
 $arrayUnshift = ArrayUnshift;
 
 $innerArrayForEach = InnerArrayForEach;
 $innerArrayEvery = InnerArrayEvery;
+$innerArraySort = InnerArraySort;
 
 });