Implement %TypedArray%.reverse

src/harmony-typedarray.js

Index: src/harmony-typedarray.js
diff --git a/src/harmony-typedarray.js b/src/harmony-typedarray.js
index 90679e0c1fe1afffb6b6b7115e93719e02d7b0c1..59c9a79bd22144422d1bce9559c4cf1367dc37d8 100644
--- a/src/harmony-typedarray.js
+++ b/src/harmony-typedarray.js
@@ -90,6 +90,15 @@ function TypedArrayFindIndex(predicate, thisArg) {
 }
 %FunctionSetLength(TypedArrayFindIndex, 1);
 
+// ES6 draft 05-18-15, section 22.2.3.21
+function TypedArrayReverse() {
+  if (!%IsTypedArray(this)) throw MakeTypeError(kNotTypedArray);
+
+  var length = %_TypedArrayGetLength(this);
+
+  return $innerArrayReverse(this, length);
+}
+
 
 // ES6 draft 08-24-14, section 22.2.2.2
 function TypedArrayOf() {
@@ -140,7 +149,8 @@ macro EXTEND_TYPED_ARRAY(NAME)
     "forEach", TypedArrayForEach,
     "find", TypedArrayFind,
     "findIndex", TypedArrayFindIndex,
-    "fill", TypedArrayFill
+    "fill", TypedArrayFill,
+    "reverse", TypedArrayReverse
   ]);
 endmacro