Move ArrayBuffer.prototype.slice implementation to C++

src/js/arraybuffer.js

Index: src/js/arraybuffer.js
diff --git a/src/js/arraybuffer.js b/src/js/arraybuffer.js
deleted file mode 100644
index 9cb93a600c92aed73ff4dd6a55b63541af2ad59f..0000000000000000000000000000000000000000
--- a/src/js/arraybuffer.js
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2013 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.
-
-(function(global, utils) {
-
-"use strict";
-
-%CheckIsBootstrapping();
-
-// -------------------------------------------------------------------
-// Imports
-
-var GlobalArrayBuffer = global.ArrayBuffer;
-var MaxSimple;
-var MinSimple;
-var SpeciesConstructor;
-
-utils.Import(function(from) {
-  MaxSimple = from.MaxSimple;
-  MinSimple = from.MinSimple;
-  SpeciesConstructor = from.SpeciesConstructor;
-});
-
-// -------------------------------------------------------------------
-
-// ES6 Draft 15.13.5.5.3
-function ArrayBufferSlice(start, end) {
-  if (!IS_ARRAYBUFFER(this)) {
-    throw %make_type_error(kIncompatibleMethodReceiver,
-                        'ArrayBuffer.prototype.slice', this);
-  }
-
-  var relativeStart = TO_INTEGER(start);
-  if (!IS_UNDEFINED(end)) {
-    end = TO_INTEGER(end);
-  }
-  var first;
-  var byte_length = %_ArrayBufferGetByteLength(this);
-  if (relativeStart < 0) {
-    first = MaxSimple(byte_length + relativeStart, 0);
-  } else {
-    first = MinSimple(relativeStart, byte_length);
-  }
-  var relativeEnd = IS_UNDEFINED(end) ? byte_length : end;
-  var fin;
-  if (relativeEnd < 0) {
-    fin = MaxSimple(byte_length + relativeEnd, 0);
-  } else {
-    fin = MinSimple(relativeEnd, byte_length);
-  }
-
-  if (fin < first) {
-    fin = first;
-  }
-  var newLen = fin - first;
-  var constructor = SpeciesConstructor(this, GlobalArrayBuffer, true);
-  var result = new constructor(newLen);
-  if (!IS_ARRAYBUFFER(result)) {
-    throw %make_type_error(kIncompatibleMethodReceiver,
-                        'ArrayBuffer.prototype.slice', result);
-  }
-  // Checks for detached source/target ArrayBuffers are done inside of
-  // %ArrayBufferSliceImpl; the reordering of checks does not violate
-  // the spec because all exceptions thrown are TypeErrors.
-  if (result === this) {
-    throw %make_type_error(kArrayBufferSpeciesThis);
-  }
-  if (%_ArrayBufferGetByteLength(result) < newLen) {
-    throw %make_type_error(kArrayBufferTooShort);
-  }
-
-  %ArrayBufferSliceImpl(this, result, first, newLen);
-  return result;
-}
-
-utils.InstallFunctions(GlobalArrayBuffer.prototype, DONT_ENUM, [
-  "slice", ArrayBufferSlice
-]);
-
-})