Move typed_data library to external/patch split instead of having an entire separate dart2js librar…

sdk/lib/_internal/lib/native_typed_data.dart

Index: sdk/lib/_internal/lib/native_typed_data.dart
diff --git a/sdk/lib/_internal/lib/native_typed_data.dart b/sdk/lib/_internal/lib/native_typed_data.dart
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+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/**
+ * Specialized integers and floating point numbers,
+ * with SIMD support and efficient lists.
+ */
+library dart.typed_data.implementation;
+
+import 'dart:collection';
+import 'dart:_internal';
+import 'dart:_interceptors' show JSIndexable, JSUInt32, JSUInt31;
+import 'dart:_js_helper'
+    show Creates, JavaScriptIndexingBehavior, JSName, Null, Returns;
+import 'dart:_foreign_helper' show JS;
+import 'dart:math' as Math;
+
+import 'dart:typed_data';
+
+class NativeByteBuffer implements ByteBuffer native "ArrayBuffer" {
+  @JSName('byteLength')
+  final int lengthInBytes;
+
+  Type get runtimeType => ByteBuffer;
+
+  Uint8List asUint8List([int offsetInBytes = 0, int length]) {
+    return new NativeUint8List.view(this, offsetInBytes, length);
+  }
+
+  Int8List asInt8List([int offsetInBytes = 0, int length]) {
+    return new NativeInt8List.view(this, offsetInBytes, length);
+  }
+
+  Uint8ClampedList asUint8ClampedList([int offsetInBytes = 0, int length]) {
+    return new NativeUint8ClampedList.view(this, offsetInBytes, length);
+  }
+
+  Uint16List asUint16List([int offsetInBytes = 0, int length]) {
+    return new NativeUint16List.view(this, offsetInBytes, length);
+  }
+  Int16List asInt16List([int offsetInBytes = 0, int length]) {
+    return new NativeInt16List.view(this, offsetInBytes, length);
+  }
+
+  Uint32List asUint32List([int offsetInBytes = 0, int length]) {
+    return new NativeUint32List.view(this, offsetInBytes, length);
+  }
+
+  Int32List asInt32List([int offsetInBytes = 0, int length]) {
+    return new NativeInt32List.view(this, offsetInBytes, length);
+  }
+
+  Uint64List asUint64List([int offsetInBytes = 0, int length]) {
+    throw new UnsupportedError("Uint64List not supported by dart2js.");
+  }
+
+  Int64List asInt64List([int offsetInBytes = 0, int length]) {
+    throw new UnsupportedError("Int64List not supported by dart2js.");
+  }
+
+  Int32x4List asInt32x4List([int offsetInBytes = 0, int length]) {
+    NativeUint32List storage =
+        this.asUint32List(offsetInBytes, length != null ? length * 4 : null);
+    return new NativeInt32x4List._externalStorage(storage);
+  }
+
+  Float32List asFloat32List([int offsetInBytes = 0, int length]) {
+    return new NativeFloat32List.view(this, offsetInBytes, length);
+  }
+
+  Float64List asFloat64List([int offsetInBytes = 0, int length]) {
+    return new NativeFloat64List.view(this, offsetInBytes, length);
+  }
+
+  Float32x4List asFloat32x4List([int offsetInBytes = 0, int length]) {
+    NativeFloat32List storage =
+        this.asFloat32List(offsetInBytes, length != null ? length * 4 : null);
+    return new NativeFloat32x4List._externalStorage(storage);
+  }
+
+  Float64x2List asFloat64x2List([int offsetInBytes = 0, int length]) {
+    NativeFloat64List storage =
+        this.asFloat64List(offsetInBytes, length != null ? length * 2 : null);
+    return new NativeFloat64x2List._externalStorage(storage);
+  }
+
+  ByteData asByteData([int offsetInBytes = 0, int length]) {
+    return new NativeByteData.view(this, offsetInBytes, length);
+  }
+}
+
+
+
+/**
+ * A fixed-length list of Float32x4 numbers that is viewable as a
+ * [TypedData]. For long lists, this implementation will be considerably more
+ * space- and time-efficient than the default [List] implementation.
+ */
+class NativeFloat32x4List
+    extends Object with ListMixin<Float32x4>, FixedLengthListMixin<Float32x4>
+    implements Float32x4List {
+
+  final NativeFloat32List _storage;
+
+  /**
+   * Creates a [Float32x4List] of the specified length (in elements),
+   * all of whose elements are initially zero.
+   */
+  NativeFloat32x4List(int length)
+      : _storage = new NativeFloat32List(length * 4);
+
+  NativeFloat32x4List._externalStorage(this._storage);
+
+  NativeFloat32x4List._slowFromList(List<Float32x4> list)
+      : _storage = new NativeFloat32List(list.length * 4) {
+    for (int i = 0; i < list.length; i++) {
+      var e = list[i];
+      _storage[(i * 4) + 0] = e.x;
+      _storage[(i * 4) + 1] = e.y;
+      _storage[(i * 4) + 2] = e.z;
+      _storage[(i * 4) + 3] = e.w;
+    }
+  }
+
+  Type get runtimeType => Float32x4List;
+
+  /**
+   * Creates a [Float32x4List] with the same size as the [elements] list
+   * and copies over the elements.
+   */
+  factory NativeFloat32x4List.fromList(List<Float32x4> list) {
+    if (list is NativeFloat32x4List) {
+      return new NativeFloat32x4List._externalStorage(
+          new NativeFloat32List.fromList(list._storage));
+    } else {
+      return new NativeFloat32x4List._slowFromList(list);
+    }
+  }
+
+  ByteBuffer get buffer => _storage.buffer;
+
+  int get lengthInBytes => _storage.lengthInBytes;
+
+  int get offsetInBytes => _storage.offsetInBytes;
+
+  int get elementSizeInBytes => Float32x4List.BYTES_PER_ELEMENT;
+
+  void _invalidIndex(int index, int length) {
+    if (index < 0 || index >= length) {
+      throw new RangeError.range(index, 0, length);
+    } else {
+      throw new ArgumentError('Invalid list index $index');
+    }
+  }
+
+  void _checkIndex(int index, int length) {
+    if (JS('bool', '(# >>> 0 != #)', index, index) || index >= length) {
+      _invalidIndex(index, length);
+    }
+  }
+
+  int _checkSublistArguments(int start, int end, int length) {
+    // For `sublist` the [start] and [end] indices are allowed to be equal to
+    // [length]. However, [_checkIndex] only allows indices in the range
+    // 0 .. length - 1. We therefore increment the [length] argument by one
+    // for the [_checkIndex] checks.
+    _checkIndex(start, length + 1);
+    if (end == null) return length;
+    _checkIndex(end, length + 1);
+    if (start > end) throw new RangeError.range(start, 0, end);
+    return end;
+  }
+
+  int get length => _storage.length ~/ 4;
+
+  Float32x4 operator[](int index) {
+    _checkIndex(index, length);
+    double _x = _storage[(index * 4) + 0];
+    double _y = _storage[(index * 4) + 1];
+    double _z = _storage[(index * 4) + 2];
+    double _w = _storage[(index * 4) + 3];
+    return new Float32x4(_x, _y, _z, _w);
+  }
+
+  void operator[]=(int index, NativeFloat32x4 value) {
+    _checkIndex(index, length);
+    _storage[(index * 4) + 0] = value._storage[0];
+    _storage[(index * 4) + 1] = value._storage[1];
+    _storage[(index * 4) + 2] = value._storage[2];
+    _storage[(index * 4) + 3] = value._storage[3];
+  }
+
+  List<Float32x4> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    return new NativeFloat32x4List._externalStorage(
+        _storage.sublist(start * 4, end * 4));
+  }
+}
+
+
+/**
+ * A fixed-length list of Int32x4 numbers that is viewable as a
+ * [TypedData]. For long lists, this implementation will be considerably more
+ * space- and time-efficient than the default [List] implementation.
+ */
+class NativeInt32x4List
+    extends Object with ListMixin<Int32x4>, FixedLengthListMixin<Int32x4>
+    implements Int32x4List {
+
+  final Uint32List _storage;
+
+  /**
+   * Creates a [Int32x4List] of the specified length (in elements),
+   * all of whose elements are initially zero.
+   */
+  NativeInt32x4List(int length) : _storage = new NativeUint32List(length * 4);
+
+  NativeInt32x4List._externalStorage(Uint32List storage) : _storage = storage;
+
+  NativeInt32x4List._slowFromList(List<Int32x4> list)
+      : _storage = new NativeUint32List(list.length * 4) {
+    for (int i = 0; i < list.length; i++) {
+      var e = list[i];
+      _storage[(i * 4) + 0] = e.x;
+      _storage[(i * 4) + 1] = e.y;
+      _storage[(i * 4) + 2] = e.z;
+      _storage[(i * 4) + 3] = e.w;
+    }
+  }
+
+  Type get runtimeType => Int32x4List;
+
+  /**
+   * Creates a [Int32x4List] with the same size as the [elements] list
+   * and copies over the elements.
+   */
+  factory NativeInt32x4List.fromList(List<Int32x4> list) {
+    if (list is NativeInt32x4List) {
+      return new NativeInt32x4List._externalStorage(
+          new NativeUint32List.fromList(list._storage));
+    } else {
+      return new NativeInt32x4List._slowFromList(list);
+    }
+  }
+
+  ByteBuffer get buffer => _storage.buffer;
+
+  int get lengthInBytes => _storage.lengthInBytes;
+
+  int get offsetInBytes => _storage.offsetInBytes;
+
+  int get elementSizeInBytes => Int32x4List.BYTES_PER_ELEMENT;
+
+  void _invalidIndex(int index, int length) {
+    if (index < 0 || index >= length) {
+      throw new RangeError.range(index, 0, length);
+    } else {
+      throw new ArgumentError('Invalid list index $index');
+    }
+  }
+
+  void _checkIndex(int index, int length) {
+    if (JS('bool', '(# >>> 0 != #)', index, index)
+        || JS('bool', '# >= #', index, length)) {
+      _invalidIndex(index, length);
+    }
+  }
+
+  int _checkSublistArguments(int start, int end, int length) {
+    // For `sublist` the [start] and [end] indices are allowed to be equal to
+    // [length]. However, [_checkIndex] only allows indices in the range
+    // 0 .. length - 1. We therefore increment the [length] argument by one
+    // for the [_checkIndex] checks.
+    _checkIndex(start, length + 1);
+    if (end == null) return length;
+    _checkIndex(end, length + 1);
+    if (start > end) throw new RangeError.range(start, 0, end);
+    return end;
+  }
+
+  int get length => _storage.length ~/ 4;
+
+  Int32x4 operator[](int index) {
+    _checkIndex(index, length);
+    int _x = _storage[(index * 4) + 0];
+    int _y = _storage[(index * 4) + 1];
+    int _z = _storage[(index * 4) + 2];
+    int _w = _storage[(index * 4) + 3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  void operator[]=(int index, NativeInt32x4 value) {
+    _checkIndex(index, length);
+    _storage[(index * 4) + 0] = value._storage[0];
+    _storage[(index * 4) + 1] = value._storage[1];
+    _storage[(index * 4) + 2] = value._storage[2];
+    _storage[(index * 4) + 3] = value._storage[3];
+  }
+
+  List<Int32x4> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    return new NativeInt32x4List._externalStorage(
+        _storage.sublist(start * 4, end * 4));
+  }
+}
+
+
+/**
+ * A fixed-length list of Float64x2 numbers that is viewable as a
+ * [TypedData]. For long lists, this implementation will be considerably more
+ * space- and time-efficient than the default [List] implementation.
+ */
+class NativeFloat64x2List
+    extends Object with ListMixin<Float64x2>, FixedLengthListMixin<Float64x2>
+    implements Float64x2List {
+
+  final NativeFloat64List _storage;
+
+  /**
+   * Creates a [Float64x2List] of the specified length (in elements),
+   * all of whose elements are initially zero.
+   */
+  NativeFloat64x2List(int length)
+      : _storage = new NativeFloat64List(length * 2);
+
+  NativeFloat64x2List._externalStorage(this._storage);
+
+  NativeFloat64x2List._slowFromList(List<Float64x2> list)
+      : _storage = new NativeFloat64List(list.length * 2) {
+    for (int i = 0; i < list.length; i++) {
+      var e = list[i];
+      _storage[(i * 2) + 0] = e.x;
+      _storage[(i * 2) + 1] = e.y;
+    }
+  }
+
+  /**
+   * Creates a [Float64x2List] with the same size as the [elements] list
+   * and copies over the elements.
+   */
+  factory NativeFloat64x2List.fromList(List<Float64x2> list) {
+    if (list is NativeFloat64x2List) {
+      return new NativeFloat64x2List._externalStorage(
+          new NativeFloat64List.fromList(list._storage));
+    } else {
+      return new NativeFloat64x2List._slowFromList(list);
+    }
+  }
+
+  Type get runtimeType => Float64x2List;
+
+  ByteBuffer get buffer => _storage.buffer;
+
+  int get lengthInBytes => _storage.lengthInBytes;
+
+  int get offsetInBytes => _storage.offsetInBytes;
+
+  int get elementSizeInBytes => Float64x2List.BYTES_PER_ELEMENT;
+
+  void _invalidIndex(int index, int length) {
+    if (index < 0 || index >= length) {
+      throw new RangeError.range(index, 0, length);
+    } else {
+      throw new ArgumentError('Invalid list index $index');
+    }
+  }
+
+  void _checkIndex(int index, int length) {
+    if (JS('bool', '(# >>> 0 != #)', index, index) || index >= length) {
+      _invalidIndex(index, length);
+    }
+  }
+
+  int _checkSublistArguments(int start, int end, int length) {
+    // For `sublist` the [start] and [end] indices are allowed to be equal to
+    // [length]. However, [_checkIndex] only allows indices in the range
+    // 0 .. length - 1. We therefore increment the [length] argument by one
+    // for the [_checkIndex] checks.
+    _checkIndex(start, length + 1);
+    if (end == null) return length;
+    _checkIndex(end, length + 1);
+    if (start > end) throw new RangeError.range(start, 0, end);
+    return end;
+  }
+
+  int get length => _storage.length ~/ 2;
+
+  Float64x2 operator[](int index) {
+    _checkIndex(index, length);
+    double _x = _storage[(index * 2) + 0];
+    double _y = _storage[(index * 2) + 1];
+    return new Float64x2(_x, _y);
+  }
+
+  void operator[]=(int index, NativeFloat64x2 value) {
+    _checkIndex(index, length);
+    _storage[(index * 2) + 0] = value._storage[0];
+    _storage[(index * 2) + 1] = value._storage[1];
+  }
+
+  List<Float64x2> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    return new NativeFloat64x2List._externalStorage(
+        _storage.sublist(start * 2, end * 2));
+  }
+}
+
+class NativeTypedData implements TypedData native "ArrayBufferView" {
+  /**
+   * Returns the byte buffer associated with this object.
+   */
+  @Creates('NativeByteBuffer')
+  // May be Null for IE's CanvasPixelArray.
+  @Returns('NativeByteBuffer|Null')
+  final ByteBuffer buffer;
+
+  /**
+   * Returns the length of this view, in bytes.
+   */
+  @JSName('byteLength')
+  final int lengthInBytes;
+
+  /**
+   * Returns the offset in bytes into the underlying byte buffer of this view.
+   */
+  @JSName('byteOffset')
+  final int offsetInBytes;
+
+  /**
+   * Returns the number of bytes in the representation of each element in this
+   * list.
+   */
+  @JSName('BYTES_PER_ELEMENT')
+  final int elementSizeInBytes;
+
+  void _invalidIndex(int index, int length) {
+    if (index < 0 || index >= length) {
+      throw new RangeError.range(index, 0, length);
+    } else {
+      throw new ArgumentError('Invalid list index $index');
+    }
+  }
+
+  void _checkIndex(int index, int length) {
+    if (JS('bool', '(# >>> 0) !== #', index, index) ||
+        JS('int', '#', index) >= length) {  // 'int' guaranteed by above test.
+      _invalidIndex(index, length);
+    }
+  }
+
+  int _checkSublistArguments(int start, int end, int length) {
+    // For `sublist` the [start] and [end] indices are allowed to be equal to
+    // [length]. However, [_checkIndex] only allows indices in the range
+    // 0 .. length - 1. We therefore increment the [length] argument by one
+    // for the [_checkIndex] checks.
+    _checkIndex(start, length + 1);
+    if (end == null) return length;
+    _checkIndex(end, length + 1);
+    if (start > end) throw new RangeError.range(start, 0, end);
+    return end;
+  }
+}
+
+
+// Validates the unnamed constructor length argument.  Checking is necessary
+// because passing unvalidated values to the native constructors can cause
+// conversions or create views.
+int _checkLength(length) {
+  if (length is! int) throw new ArgumentError('Invalid length $length');
+  return length;
+}
+
+// Validates `.view` constructor arguments.  Checking is necessary because
+// passing unvalidated values to the native constructors can cause conversions
+// (e.g. String arguments) or create typed data objects that are not actually
+// views of the input.
+void _checkViewArguments(buffer, offsetInBytes, length) {
+  if (buffer is! NativeByteBuffer) {
+    throw new ArgumentError('Invalid view buffer');
+  }
+  if (offsetInBytes is! int) {
+    throw new ArgumentError('Invalid view offsetInBytes $offsetInBytes');
+  }
+  if (length != null && length is! int) {
+    throw new ArgumentError('Invalid view length $length');
+  }
+}
+
+// Ensures that [list] is a JavaScript Array or a typed array.  If necessary,
+// returns a copy of the list.
+List _ensureNativeList(List list) {
+  if (list is JSIndexable) return list;
+  List result = new List(list.length);
+  for (int i = 0; i < list.length; i++) {
+    result[i] = list[i];
+  }
+  return result;
+}
+
+
+class NativeByteData extends NativeTypedData implements ByteData
+    native "DataView" {
+  /**
+   * Creates a [ByteData] of the specified length (in elements), all of
+   * whose elements are initially zero.
+   */
+  factory NativeByteData(int length) => _create1(_checkLength(length));
+
+  /**
+   * Creates an [ByteData] _view_ of the specified region in the specified
+   * byte buffer. Changes in the [ByteData] will be visible in the byte
+   * buffer and vice versa. If the [offsetInBytes] index of the region is not
+   * specified, it defaults to zero (the first byte in the byte buffer).
+   * If the length is not specified, it defaults to null, which indicates
+   * that the view extends to the end of the byte buffer.
+   *
+   * Throws [RangeError] if [offsetInBytes] or [length] are negative, or
+   * if [offsetInBytes] + ([length] * elementSizeInBytes) is greater than
+   * the length of [buffer].
+   */
+  factory NativeByteData.view(ByteBuffer buffer,
+                              int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => ByteData;
+
+  int get elementSizeInBytes => 1;
+
+  /**
+   * Returns the floating point number represented by the four bytes at
+   * the specified [byteOffset] in this object, in IEEE 754
+   * single-precision binary floating-point format (binary32).
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  num getFloat32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _getFloat32(byteOffset, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('getFloat32')
+  @Returns('num')
+  num _getFloat32(int byteOffset, [bool littleEndian]) native;
+
+  /**
+   * Returns the floating point number represented by the eight bytes at
+   * the specified [byteOffset] in this object, in IEEE 754
+   * double-precision binary floating-point format (binary64).
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  num getFloat64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _getFloat64(byteOffset, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('getFloat64')
+  @Returns('num')
+  num _getFloat64(int byteOffset, [bool littleEndian]) native;
+
+  /**
+   * Returns the (possibly negative) integer represented by the two bytes at
+   * the specified [byteOffset] in this object, in two's complement binary
+   * form.
+   * The return value will be between 2<sup>15</sup> and 2<sup>15</sup> - 1,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  int getInt16(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _getInt16(byteOffset, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('getInt16')
+  @Returns('int')
+  int _getInt16(int byteOffset, [bool littleEndian]) native;
+
+  /**
+   * Returns the (possibly negative) integer represented by the four bytes at
+   * the specified [byteOffset] in this object, in two's complement binary
+   * form.
+   * The return value will be between 2<sup>31</sup> and 2<sup>31</sup> - 1,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  int getInt32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _getInt32(byteOffset, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('getInt32')
+  @Returns('int')
+  int _getInt32(int byteOffset, [bool littleEndian]) native;
+
+  /**
+   * Returns the (possibly negative) integer represented by the eight bytes at
+   * the specified [byteOffset] in this object, in two's complement binary
+   * form.
+   * The return value will be between 2<sup>63</sup> and 2<sup>63</sup> - 1,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  int getInt64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) {
+    throw new UnsupportedError('Int64 accessor not supported by dart2js.');
+  }
+
+  /**
+   * Returns the (possibly negative) integer represented by the byte at the
+   * specified [byteOffset] in this object, in two's complement binary
+   * representation. The return value will be between -128 and 127, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * greater than or equal to the length of this object.
+   */
+  int getInt8(int byteOffset) native;
+
+  /**
+   * Returns the positive integer represented by the two bytes starting
+   * at the specified [byteOffset] in this object, in unsigned binary
+   * form.
+   * The return value will be between 0 and  2<sup>16</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  int getUint16(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _getUint16(byteOffset, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('getUint16')
+  @Returns('JSUInt31')
+  int _getUint16(int byteOffset, [bool littleEndian]) native;
+
+  /**
+   * Returns the positive integer represented by the four bytes starting
+   * at the specified [byteOffset] in this object, in unsigned binary
+   * form.
+   * The return value will be between 0 and  2<sup>32</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  int getUint32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _getUint32(byteOffset, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('getUint32')
+  @Returns('JSUInt32')
+  int _getUint32(int byteOffset, [bool littleEndian]) native;
+
+  /**
+   * Returns the positive integer represented by the eight bytes starting
+   * at the specified [byteOffset] in this object, in unsigned binary
+   * form.
+   * The return value will be between 0 and  2<sup>64</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  int getUint64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) {
+    throw new UnsupportedError('Uint64 accessor not supported by dart2js.');
+  }
+
+  /**
+   * Returns the positive integer represented by the byte at the specified
+   * [byteOffset] in this object, in unsigned binary form. The
+   * return value will be between 0 and 255, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * greater than or equal to the length of this object.
+   */
+  int getUint8(int byteOffset) native;
+
+  /**
+   * Sets the four bytes starting at the specified [byteOffset] in this
+   * object to the IEEE 754 single-precision binary floating-point
+   * (binary32) representation of the specified [value].
+   *
+   * **Note that this method can lose precision.** The input [value] is
+   * a 64-bit floating point value, which will be converted to 32-bit
+   * floating point value by IEEE 754 rounding rules before it is stored.
+   * If [value] cannot be represented exactly as a binary32, it will be
+   * converted to the nearest binary32 value.  If two binary32 values are
+   * equally close, the one whose least significant bit is zero will be used.
+   * Note that finite (but large) values can be converted to infinity, and
+   * small non-zero values can be converted to zero.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  void setFloat32(int byteOffset, num value,
+                  [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _setFloat32(byteOffset, value, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('setFloat32')
+  void _setFloat32(int byteOffset, num value, [bool littleEndian]) native;
+
+  /**
+   * Sets the eight bytes starting at the specified [byteOffset] in this
+   * object to the IEEE 754 double-precision binary floating-point
+   * (binary64) representation of the specified [value].
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  void setFloat64(int byteOffset, num value,
+                  [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _setFloat64(byteOffset, value, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('setFloat64')
+  void _setFloat64(int byteOffset, num value, [bool littleEndian]) native;
+
+  /**
+   * Sets the two bytes starting at the specified [byteOffset] in this
+   * object to the two's complement binary representation of the specified
+   * [value], which must fit in two bytes. In other words, [value] must lie
+   * between 2<sup>15</sup> and 2<sup>15</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  void setInt16(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _setInt16(byteOffset, value, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('setInt16')
+  void _setInt16(int byteOffset, int value, [bool littleEndian]) native;
+
+  /**
+   * Sets the four bytes starting at the specified [byteOffset] in this
+   * object to the two's complement binary representation of the specified
+   * [value], which must fit in four bytes. In other words, [value] must lie
+   * between 2<sup>31</sup> and 2<sup>31</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  void setInt32(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _setInt32(byteOffset, value, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('setInt32')
+  void _setInt32(int byteOffset, int value, [bool littleEndian]) native;
+
+  /**
+   * Sets the eight bytes starting at the specified [byteOffset] in this
+   * object to the two's complement binary representation of the specified
+   * [value], which must fit in eight bytes. In other words, [value] must lie
+   * between 2<sup>63</sup> and 2<sup>63</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  void setInt64(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]) {
+    throw new UnsupportedError('Int64 accessor not supported by dart2js.');
+  }
+
+  /**
+   * Sets the byte at the specified [byteOffset] in this object to the
+   * two's complement binary representation of the specified [value], which
+   * must fit in a single byte. In other words, [value] must be between
+   * -128 and 127, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * greater than or equal to the length of this object.
+   */
+  void setInt8(int byteOffset, int value) native;
+
+  /**
+   * Sets the two bytes starting at the specified [byteOffset] in this object
+   * to the unsigned binary representation of the specified [value],
+   * which must fit in two bytes. in other words, [value] must be between
+   * 0 and 2<sup>16</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  void setUint16(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _setUint16(byteOffset, value, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('setUint16')
+  void _setUint16(int byteOffset, int value, [bool littleEndian]) native;
+
+  /**
+   * Sets the four bytes starting at the specified [byteOffset] in this object
+   * to the unsigned binary representation of the specified [value],
+   * which must fit in four bytes. in other words, [value] must be between
+   * 0 and 2<sup>32</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  void setUint32(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]) =>
+      _setUint32(byteOffset, value, Endianness.LITTLE_ENDIAN == endian);
+
+  @JSName('setUint32')
+  void _setUint32(int byteOffset, int value, [bool littleEndian]) native;
+
+  /**
+   * Sets the eight bytes starting at the specified [byteOffset] in this object
+   * to the unsigned binary representation of the specified [value],
+   * which must fit in eight bytes. in other words, [value] must be between
+   * 0 and 2<sup>64</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  void setUint64(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]) {
+    throw new UnsupportedError('Uint64 accessor not supported by dart2js.');
+  }
+
+  /**
+   * Sets the byte at the specified [byteOffset] in this object to the
+   * unsigned binary representation of the specified [value], which must fit
+   * in a single byte. in other words, [value] must be between 0 and 255,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative,
+   * or greater than or equal to the length of this object.
+   */
+  void setUint8(int byteOffset, int value) native;
+
+  static NativeByteData _create1(arg) =>
+      JS('NativeByteData', 'new DataView(new ArrayBuffer(#))', arg);
+
+  static NativeByteData _create2(arg1, arg2) =>
+      JS('NativeByteData', 'new DataView(#, #)', arg1, arg2);
+
+  static NativeByteData _create3(arg1, arg2, arg3) =>
+      JS('NativeByteData', 'new DataView(#, #, #)', arg1, arg2, arg3);
+}
+
+
+abstract class NativeTypedArray extends NativeTypedData
+    implements JavaScriptIndexingBehavior {
+  int get length => JS('JSUInt32', '#.length', this);
+
+  bool _setRangeFast(int start, int end,
+      NativeTypedArray source, int skipCount) {
+    int targetLength = this.length;
+    _checkIndex(start, targetLength + 1);
+    _checkIndex(end, targetLength + 1);
+    if (start > end) throw new RangeError.range(start, 0, end);
+    int count = end - start;
+
+    if (skipCount < 0) throw new ArgumentError(skipCount);
+
+    int sourceLength = source.length;
+    if (sourceLength - skipCount < count)  {
+      throw new StateError('Not enough elements');
+    }
+
+    if (skipCount != 0 || sourceLength != count) {
+      // Create a view of the exact subrange that is copied from the source.
+      source = JS('', '#.subarray(#, #)',
+          source, skipCount, skipCount + count);
+    }
+    JS('void', '#.set(#, #)', this, source, start);
+  }
+}
+
+abstract class NativeTypedArrayOfDouble
+    extends NativeTypedArray
+        with ListMixin<double>, FixedLengthListMixin<double> {
+
+  num operator[](int index) {
+    _checkIndex(index, length);
+    return JS('num', '#[#]', this, index);
+  }
+
+  void operator[]=(int index, num value) {
+    _checkIndex(index, length);
+    JS('void', '#[#] = #', this, index, value);
+  }
+
+  void setRange(int start, int end, Iterable<double> iterable,
+                [int skipCount = 0]) {
+    if (iterable is NativeTypedArrayOfDouble) {
+      _setRangeFast(start, end, iterable, skipCount);
+      return;
+    }
+    super.setRange(start, end, iterable, skipCount);
+  }
+}
+
+abstract class NativeTypedArrayOfInt
+    extends NativeTypedArray
+        with ListMixin<int>, FixedLengthListMixin<int>
+    implements List<int> {
+
+  // operator[]() is not here since different versions have different return
+  // types
+
+  void operator[]=(int index, int value) {
+    _checkIndex(index, length);
+    JS('void', '#[#] = #', this, index, value);
+  }
+
+  void setRange(int start, int end, Iterable<int> iterable,
+                [int skipCount = 0]) {
+    if (iterable is NativeTypedArrayOfInt) {
+      _setRangeFast(start, end, iterable, skipCount);
+      return;
+    }
+    super.setRange(start, end, iterable, skipCount);
+  }
+}
+
+
+class NativeFloat32List
+    extends NativeTypedArrayOfDouble
+    implements Float32List
+    native "Float32Array" {
+
+  factory NativeFloat32List(int length) => _create1(_checkLength(length));
+
+  factory NativeFloat32List.fromList(List<double> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeFloat32List.view(ByteBuffer buffer,
+                                 int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Float32List;
+
+  List<double> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeFloat32List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeFloat32List _create1(arg) =>
+      JS('NativeFloat32List', 'new Float32Array(#)', arg);
+
+  static NativeFloat32List _create2(arg1, arg2) =>
+      JS('NativeFloat32List', 'new Float32Array(#, #)', arg1, arg2);
+
+  static NativeFloat32List _create3(arg1, arg2, arg3) =>
+      JS('NativeFloat32List', 'new Float32Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeFloat64List
+    extends NativeTypedArrayOfDouble
+    implements Float64List
+    native "Float64Array" {
+
+  factory NativeFloat64List(int length) => _create1(_checkLength(length));
+
+  factory NativeFloat64List.fromList(List<double> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeFloat64List.view(ByteBuffer buffer,
+                                 int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Float64List;
+
+  List<double> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeFloat64List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeFloat64List _create1(arg) =>
+      JS('NativeFloat64List', 'new Float64Array(#)', arg);
+
+  static NativeFloat64List _create2(arg1, arg2) =>
+      JS('NativeFloat64List', 'new Float64Array(#, #)', arg1, arg2);
+
+  static NativeFloat64List _create3(arg1, arg2, arg3) =>
+      JS('NativeFloat64List', 'new Float64Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeInt16List
+    extends NativeTypedArrayOfInt
+    implements Int16List
+    native "Int16Array" {
+
+  factory NativeInt16List(int length) => _create1(_checkLength(length));
+
+  factory NativeInt16List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeInt16List.view(NativeByteBuffer buffer,
+                               int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Int16List;
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('int', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeInt16List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeInt16List _create1(arg) =>
+      JS('NativeInt16List', 'new Int16Array(#)', arg);
+
+  static NativeInt16List _create2(arg1, arg2) =>
+      JS('NativeInt16List', 'new Int16Array(#, #)', arg1, arg2);
+
+  static NativeInt16List _create3(arg1, arg2, arg3) =>
+      JS('NativeInt16List', 'new Int16Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeInt32List
+    extends NativeTypedArrayOfInt
+    implements Int32List
+    native "Int32Array" {
+
+  factory NativeInt32List(int length) => _create1(_checkLength(length));
+
+  factory NativeInt32List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeInt32List.view(ByteBuffer buffer,
+                               int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Int32List;
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('int', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeInt32List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeInt32List _create1(arg) =>
+      JS('NativeInt32List', 'new Int32Array(#)', arg);
+
+  static NativeInt32List _create2(arg1, arg2) =>
+      JS('NativeInt32List', 'new Int32Array(#, #)', arg1, arg2);
+
+  static NativeInt32List _create3(arg1, arg2, arg3) =>
+      JS('NativeInt32List', 'new Int32Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeInt8List
+    extends NativeTypedArrayOfInt
+    implements Int8List
+    native "Int8Array" {
+
+  factory NativeInt8List(int length) => _create1(_checkLength(length));
+
+  factory NativeInt8List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeInt8List.view(ByteBuffer buffer,
+                               int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Int8List;
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('int', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeInt8List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeInt8List _create1(arg) =>
+      JS('NativeInt8List', 'new Int8Array(#)', arg);
+
+  static NativeInt8List _create2(arg1, arg2) =>
+      JS('NativeInt8List', 'new Int8Array(#, #)', arg1, arg2);
+
+  static Int8List _create3(arg1, arg2, arg3) =>
+      JS('NativeInt8List', 'new Int8Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeUint16List
+    extends NativeTypedArrayOfInt
+    implements Uint16List
+    native "Uint16Array" {
+
+  factory NativeUint16List(int length) => _create1(_checkLength(length));
+
+  factory NativeUint16List.fromList(List<int> list) =>
+      _create1(_ensureNativeList(list));
+
+  factory NativeUint16List.view(ByteBuffer buffer,
+                                int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Uint16List;
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('JSUInt31', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeUint16List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeUint16List _create1(arg) =>
+      JS('NativeUint16List', 'new Uint16Array(#)', arg);
+
+  static NativeUint16List _create2(arg1, arg2) =>
+      JS('NativeUint16List', 'new Uint16Array(#, #)', arg1, arg2);
+
+  static NativeUint16List _create3(arg1, arg2, arg3) =>
+      JS('NativeUint16List', 'new Uint16Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeUint32List
+    extends NativeTypedArrayOfInt
+    implements Uint32List
+    native "Uint32Array" {
+
+  factory NativeUint32List(int length) => _create1(_checkLength(length));
+
+  factory NativeUint32List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeUint32List.view(ByteBuffer buffer,
+                                int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Uint32List;
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('JSUInt32', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeUint32List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeUint32List _create1(arg) =>
+      JS('NativeUint32List', 'new Uint32Array(#)', arg);
+
+  static NativeUint32List _create2(arg1, arg2) =>
+      JS('NativeUint32List', 'new Uint32Array(#, #)', arg1, arg2);
+
+  static NativeUint32List _create3(arg1, arg2, arg3) =>
+      JS('NativeUint32List', 'new Uint32Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+class NativeUint8ClampedList
+    extends NativeTypedArrayOfInt
+    implements Uint8ClampedList
+    native "Uint8ClampedArray,CanvasPixelArray" {
+
+  factory NativeUint8ClampedList(int length) => _create1(_checkLength(length));
+
+  factory NativeUint8ClampedList.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeUint8ClampedList.view(ByteBuffer buffer,
+                                      int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Uint8ClampedList;
+
+  int get length => JS('JSUInt32', '#.length', this);
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('JSUInt31', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeUint8ClampedList', '#.subarray(#, #)',
+        this, start, end);
+    return _create1(source);
+  }
+
+  static NativeUint8ClampedList _create1(arg) =>
+      JS('NativeUint8ClampedList', 'new Uint8ClampedArray(#)', arg);
+
+  static NativeUint8ClampedList _create2(arg1, arg2) =>
+      JS('NativeUint8ClampedList', 'new Uint8ClampedArray(#, #)', arg1, arg2);
+
+  static NativeUint8ClampedList _create3(arg1, arg2, arg3) =>
+      JS('NativeUint8ClampedList', 'new Uint8ClampedArray(#, #, #)',
+         arg1, arg2, arg3);
+}
+
+
+class NativeUint8List
+    extends NativeTypedArrayOfInt
+    implements Uint8List
+    // On some browsers Uint8ClampedArray is a subtype of Uint8Array.  Marking
+    // Uint8List as !nonleaf ensures that the native dispatch correctly handles
+    // the potential for Uint8ClampedArray to 'accidentally' pick up the
+    // dispatch record for Uint8List.
+    native "Uint8Array,!nonleaf" {
+
+  factory NativeUint8List(int length) => _create1(_checkLength(length));
+
+  factory NativeUint8List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeUint8List.view(ByteBuffer buffer,
+                               int offsetInBytes, int length) {
+    _checkViewArguments(buffer, offsetInBytes, length);
+    return length == null
+        ? _create2(buffer, offsetInBytes)
+        : _create3(buffer, offsetInBytes, length);
+  }
+
+  Type get runtimeType => Uint8List;
+
+  int get length => JS('JSUInt32', '#.length', this);
+
+  int operator[](int index) {
+    _checkIndex(index, length);
+    return JS('JSUInt31', '#[#]', this, index);
+  }
+
+  List<int> sublist(int start, [int end]) {
+    end = _checkSublistArguments(start, end, length);
+    var source = JS('NativeUint8List', '#.subarray(#, #)', this, start, end);
+    return _create1(source);
+  }
+
+  static NativeUint8List _create1(arg) =>
+      JS('NativeUint8List', 'new Uint8Array(#)', arg);
+
+  static NativeUint8List _create2(arg1, arg2) =>
+      JS('NativeUint8List', 'new Uint8Array(#, #)', arg1, arg2);
+
+  static NativeUint8List _create3(arg1, arg2, arg3) =>
+      JS('NativeUint8List', 'new Uint8Array(#, #, #)', arg1, arg2, arg3);
+}
+
+
+/**
+ * Implementation of Dart Float32x4 immutable value type and operations.
+ * Float32x4 stores 4 32-bit floating point values in "lanes".
+ * The lanes are "x", "y", "z", and "w" respectively.
+ */
+class NativeFloat32x4 implements Float32x4 {
+  final _storage = new Float32List(4);
+
+  NativeFloat32x4(double x, double y, double z, double w) {
+    _storage[0] = x;
+    _storage[1] = y;
+    _storage[2] = z;
+    _storage[3] = w;
+  }
+
+  NativeFloat32x4.splat(double v) {
+    _storage[0] = v;
+    _storage[1] = v;
+    _storage[2] = v;
+    _storage[3] = v;
+  }
+
+  NativeFloat32x4.zero();
+  /// Returns a bit-wise copy of [x] as a Float32x4.
+
+  NativeFloat32x4.fromInt32x4Bits(NativeInt32x4 x) {

[Lasse Reichstein Nielsen, 2014/07/03 12:32:12]

It looks wrong (heck, it is wrong) to expect a NativeInt32x4 here, and not any
Int32x4, but it's *no different from the existing code* - except that it's now
also a type error to use another implementation of Int32x4, instead of it just
not having a _storage member.

(I.e., this is bad, but it was already bad, and this CL is not trying to fix it
- it just happens to make it more visible).

+    var view = x._storage.buffer.asFloat32List();
+    _storage[0] = view[0];
+    _storage[1] = view[1];
+    _storage[2] = view[2];
+    _storage[3] = view[3];
+  }
+
+  NativeFloat32x4.fromFloat64x2(NativeFloat64x2 v) {
+    _storage[0] = v._storage[0];
+    _storage[1] = v._storage[1];
+  }
+
+  String toString() {
+    return '[${_storage[0]}, ${_storage[1]}, ${_storage[2]}, ${_storage[3]}]';
+  }
+
+   /// Addition operator.
+  Float32x4 operator+(NativeFloat32x4 other) {
+    double _x = _storage[0] + other._storage[0];
+    double _y = _storage[1] + other._storage[1];
+    double _z = _storage[2] + other._storage[2];
+    double _w = _storage[3] + other._storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Negate operator.
+  Float32x4 operator-() {
+    double _x = -_storage[0];
+    double _y = -_storage[1];
+    double _z = -_storage[2];
+    double _w = -_storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Subtraction operator.
+  Float32x4 operator-(NativeFloat32x4 other) {
+    double _x = _storage[0] - other._storage[0];
+    double _y = _storage[1] - other._storage[1];
+    double _z = _storage[2] - other._storage[2];
+    double _w = _storage[3] - other._storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Multiplication operator.
+  Float32x4 operator*(NativeFloat32x4 other) {
+    double _x = _storage[0] * other._storage[0];
+    double _y = _storage[1] * other._storage[1];
+    double _z = _storage[2] * other._storage[2];
+    double _w = _storage[3] * other._storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Division operator.
+  Float32x4 operator/(NativeFloat32x4 other) {
+    double _x = _storage[0] / other._storage[0];
+    double _y = _storage[1] / other._storage[1];
+    double _z = _storage[2] / other._storage[2];
+    double _w = _storage[3] / other._storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Relational less than.
+  Int32x4 lessThan(NativeFloat32x4 other) {
+    bool _cx = _storage[0] < other._storage[0];
+    bool _cy = _storage[1] < other._storage[1];
+    bool _cz = _storage[2] < other._storage[2];
+    bool _cw = _storage[3] < other._storage[3];
+    return new NativeInt32x4(_cx == true ? 0xFFFFFFFF : 0x0,
+                        _cy == true ? 0xFFFFFFFF : 0x0,
+                        _cz == true ? 0xFFFFFFFF : 0x0,
+                        _cw == true ? 0xFFFFFFFF : 0x0);
+  }
+
+  /// Relational less than or equal.
+  Int32x4 lessThanOrEqual(NativeFloat32x4 other) {
+    bool _cx = _storage[0] <= other._storage[0];
+    bool _cy = _storage[1] <= other._storage[1];
+    bool _cz = _storage[2] <= other._storage[2];
+    bool _cw = _storage[3] <= other._storage[3];
+    return new NativeInt32x4(_cx == true ? 0xFFFFFFFF : 0x0,
+                        _cy == true ? 0xFFFFFFFF : 0x0,
+                        _cz == true ? 0xFFFFFFFF : 0x0,
+                        _cw == true ? 0xFFFFFFFF : 0x0);
+  }
+
+  /// Relational greater than.
+  Int32x4 greaterThan(NativeFloat32x4 other) {
+    bool _cx = _storage[0] > other._storage[0];
+    bool _cy = _storage[1] > other._storage[1];
+    bool _cz = _storage[2] > other._storage[2];
+    bool _cw = _storage[3] > other._storage[3];
+    return new NativeInt32x4(_cx == true ? 0xFFFFFFFF : 0x0,
+                        _cy == true ? 0xFFFFFFFF : 0x0,
+                        _cz == true ? 0xFFFFFFFF : 0x0,
+                        _cw == true ? 0xFFFFFFFF : 0x0);
+  }
+
+  /// Relational greater than or equal.
+  Int32x4 greaterThanOrEqual(NativeFloat32x4 other) {
+    bool _cx = _storage[0] >= other._storage[0];
+    bool _cy = _storage[1] >= other._storage[1];
+    bool _cz = _storage[2] >= other._storage[2];
+    bool _cw = _storage[3] >= other._storage[3];
+    return new NativeInt32x4(_cx == true ? 0xFFFFFFFF : 0x0,
+                        _cy == true ? 0xFFFFFFFF : 0x0,
+                        _cz == true ? 0xFFFFFFFF : 0x0,
+                        _cw == true ? 0xFFFFFFFF : 0x0);
+  }
+
+  /// Relational equal.
+  Int32x4 equal(NativeFloat32x4 other) {
+    bool _cx = _storage[0] == other._storage[0];
+    bool _cy = _storage[1] == other._storage[1];
+    bool _cz = _storage[2] == other._storage[2];
+    bool _cw = _storage[3] == other._storage[3];
+    return new NativeInt32x4(_cx == true ? 0xFFFFFFFF : 0x0,
+                        _cy == true ? 0xFFFFFFFF : 0x0,
+                        _cz == true ? 0xFFFFFFFF : 0x0,
+                        _cw == true ? 0xFFFFFFFF : 0x0);
+  }
+
+  /// Relational not-equal.
+  Int32x4 notEqual(NativeFloat32x4 other) {
+    bool _cx = _storage[0] != other._storage[0];
+    bool _cy = _storage[1] != other._storage[1];
+    bool _cz = _storage[2] != other._storage[2];
+    bool _cw = _storage[3] != other._storage[3];
+    return new NativeInt32x4(_cx == true ? 0xFFFFFFFF : 0x0,
+                        _cy == true ? 0xFFFFFFFF : 0x0,
+                        _cz == true ? 0xFFFFFFFF : 0x0,
+                        _cw == true ? 0xFFFFFFFF : 0x0);
+  }
+
+  /// Returns a copy of [this] each lane being scaled by [s].
+  Float32x4 scale(double s) {
+    double _x = s * _storage[0];
+    double _y = s * _storage[1];
+    double _z = s * _storage[2];
+    double _w = s * _storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns the absolute value of this [Float32x4].
+  Float32x4 abs() {
+    double _x = _storage[0].abs();
+    double _y = _storage[1].abs();
+    double _z = _storage[2].abs();
+    double _w = _storage[3].abs();
+    return new Float32x4(_x, _y, _z, _w);
+  }
+
+  /// Clamps [this] to be in the range [lowerLimit]-[upperLimit].
+  NativeFloat32x4 clamp(NativeFloat32x4 lowerLimit,
+                        NativeFloat32x4 upperLimit) {
+    double _lx = lowerLimit._storage[0];
+    double _ly = lowerLimit._storage[1];
+    double _lz = lowerLimit._storage[2];
+    double _lw = lowerLimit._storage[3];
+    double _ux = upperLimit._storage[0];
+    double _uy = upperLimit._storage[1];
+    double _uz = upperLimit._storage[2];
+    double _uw = upperLimit._storage[3];
+    double _x = _storage[0];
+    double _y = _storage[1];
+    double _z = _storage[2];
+    double _w = _storage[3];
+    // MAX(MIN(self, upper), lower).
+    _x = _x > _ux ? _ux : _x;
+    _y = _y > _uy ? _uy : _y;
+    _z = _z > _uz ? _uz : _z;
+    _w = _w > _uw ? _uw : _w;
+    _x = _x < _lx ? _lx : _x;
+    _y = _y < _ly ? _ly : _y;
+    _z = _z < _lz ? _lz : _z;
+    _w = _w < _lw ? _lw : _w;
+    return new Float32x4(_x, _y, _z, _w);
+  }
+
+  /// Extracted x value.
+  double get x => _storage[0];
+  /// Extracted y value.
+  double get y => _storage[1];
+  /// Extracted z value.
+  double get z => _storage[2];
+  /// Extracted w value.
+  double get w => _storage[3];
+
+  /// Extract the sign bit from each lane return them in the first 4 bits.
+  int get signMask {
+    var view = new NativeUint32List.view(_storage.buffer, 0, null);
+    var mx = (view[0] & 0x80000000) >> 31;
+    var my = (view[1] & 0x80000000) >> 31;
+    var mz = (view[2] & 0x80000000) >> 31;
+    var mw = (view[3] & 0x80000000) >> 31;
+    return mx | my << 1 | mz << 2 | mw << 3;
+  }
+
+  /// Shuffle the lane values. [mask] must be one of the 256 shuffle constants.
+  Float32x4 shuffle(int m) {
+    if ((m < 0) || (m > 255)) {
+      throw new RangeError('mask $m must be in the range [0..256)');
+    }
+    double _x = _storage[m & 0x3];
+    double _y = _storage[(m >> 2) & 0x3];
+    double _z = _storage[(m >> 4) & 0x3];
+    double _w = _storage[(m >> 6) & 0x3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Shuffle the lane values in [this] and [other]. The returned
+  /// Float32x4 will have XY lanes from [this] and ZW lanes from [other].
+  /// Uses the same [mask] as [shuffle].
+  Float32x4 shuffleMix(NativeFloat32x4 other, int m) {
+    if ((m < 0) || (m > 255)) {
+      throw new RangeError('mask $m must be in the range [0..256)');
+    }
+    double _x = _storage[m & 0x3];
+    double _y = _storage[(m >> 2) & 0x3];
+    double _z = other._storage[(m >> 4) & 0x3];
+    double _w = other._storage[(m >> 6) & 0x3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Copy [this] and replace the [x] lane.
+  Float32x4 withX(double x) {
+    double _x = x;
+    double _y = _storage[1];
+    double _z = _storage[2];
+    double _w = _storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Copy [this] and replace the [y] lane.
+  Float32x4 withY(double y) {
+    double _x = _storage[0];
+    double _y = y;
+    double _z = _storage[2];
+    double _w = _storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Copy [this] and replace the [z] lane.
+  Float32x4 withZ(double z) {
+    double _x = _storage[0];
+    double _y = _storage[1];
+    double _z = z;
+    double _w = _storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Copy [this] and replace the [w] lane.
+  Float32x4 withW(double w) {
+    double _x = _storage[0];
+    double _y = _storage[1];
+    double _z = _storage[2];
+    double _w = w;
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns the lane-wise minimum value in [this] or [other].
+  Float32x4 min(NativeFloat32x4 other) {
+    double _x = _storage[0] < other._storage[0] ?
+        _storage[0] : other._storage[0];
+    double _y = _storage[1] < other._storage[1] ?
+        _storage[1] : other._storage[1];
+    double _z = _storage[2] < other._storage[2] ?
+        _storage[2] : other._storage[2];
+    double _w = _storage[3] < other._storage[3] ?
+        _storage[3] : other._storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns the lane-wise maximum value in [this] or [other].
+  Float32x4 max(NativeFloat32x4 other) {
+    double _x = _storage[0] > other._storage[0] ?
+        _storage[0] : other._storage[0];
+    double _y = _storage[1] > other._storage[1] ?
+        _storage[1] : other._storage[1];
+    double _z = _storage[2] > other._storage[2] ?
+        _storage[2] : other._storage[2];
+    double _w = _storage[3] > other._storage[3] ?
+        _storage[3] : other._storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns the square root of [this].
+  Float32x4 sqrt() {
+    double _x = Math.sqrt(_storage[0]);
+    double _y = Math.sqrt(_storage[1]);
+    double _z = Math.sqrt(_storage[2]);
+    double _w = Math.sqrt(_storage[3]);
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns the reciprocal of [this].
+  Float32x4 reciprocal() {
+    double _x = 1.0 / _storage[0];
+    double _y = 1.0 / _storage[1];
+    double _z = 1.0 / _storage[2];
+    double _w = 1.0 / _storage[3];
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns the square root of the reciprocal of [this].
+  Float32x4 reciprocalSqrt() {
+    double _x = Math.sqrt(1.0 / _storage[0]);
+    double _y = Math.sqrt(1.0 / _storage[1]);
+    double _z = Math.sqrt(1.0 / _storage[2]);
+    double _w = Math.sqrt(1.0 / _storage[3]);
+    return new NativeFloat32x4(_x, _y, _z, _w);
+  }
+}
+
+
+/**
+ * Interface of Dart Int32x4 and operations.
+ * Int32x4 stores 4 32-bit bit-masks in "lanes".
+ * The lanes are "x", "y", "z", and "w" respectively.
+ */
+class NativeInt32x4 implements Int32x4 {
+  final _storage = new NativeInt32List(4);
+
+  NativeInt32x4(int x, int y, int z, int w) {
+    _storage[0] = x;
+    _storage[1] = y;
+    _storage[2] = z;
+    _storage[3] = w;
+  }
+
+  NativeInt32x4.bool(bool x, bool y, bool z, bool w) {
+    _storage[0] = x == true ? 0xFFFFFFFF : 0x0;
+    _storage[1] = y == true ? 0xFFFFFFFF : 0x0;
+    _storage[2] = z == true ? 0xFFFFFFFF : 0x0;
+    _storage[3] = w == true ? 0xFFFFFFFF : 0x0;
+  }
+
+  /// Returns a bit-wise copy of [x] as a Int32x4.
+  NativeInt32x4.fromFloat32x4Bits(NativeFloat32x4 x) {
+    var view = new NativeUint32List.view(x._storage.buffer, 0, null);
+    _storage[0] = view[0];
+    _storage[1] = view[1];
+    _storage[2] = view[2];
+    _storage[3] = view[3];
+  }
+
+  String toString() {
+    return '[${_storage[0]}, ${_storage[1]}, ${_storage[2]}, ${_storage[3]}]';
+  }
+
+  /// The bit-wise or operator.
+  Int32x4 operator|(NativeInt32x4 other) {
+    int _x = _storage[0] | other._storage[0];
+    int _y = _storage[1] | other._storage[1];
+    int _z = _storage[2] | other._storage[2];
+    int _w = _storage[3] | other._storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// The bit-wise and operator.
+  Int32x4 operator&(NativeInt32x4 other) {
+    int _x = _storage[0] & other._storage[0];
+    int _y = _storage[1] & other._storage[1];
+    int _z = _storage[2] & other._storage[2];
+    int _w = _storage[3] & other._storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// The bit-wise xor operator.
+  Int32x4 operator^(NativeInt32x4 other) {
+    int _x = _storage[0] ^ other._storage[0];
+    int _y = _storage[1] ^ other._storage[1];
+    int _z = _storage[2] ^ other._storage[2];
+    int _w = _storage[3] ^ other._storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  Int32x4 operator+(NativeInt32x4 other) {
+    var r = new NativeInt32x4(0, 0, 0, 0);
+    r._storage[0] = (_storage[0] + other._storage[0]);
+    r._storage[1] = (_storage[1] + other._storage[1]);
+    r._storage[2] = (_storage[2] + other._storage[2]);
+    r._storage[3] = (_storage[3] + other._storage[3]);
+    return r;
+  }
+
+  Int32x4 operator-(NativeInt32x4 other) {
+    var r = new NativeInt32x4(0, 0, 0, 0);
+    r._storage[0] = (_storage[0] - other._storage[0]);
+    r._storage[1] = (_storage[1] - other._storage[1]);
+    r._storage[2] = (_storage[2] - other._storage[2]);
+    r._storage[3] = (_storage[3] - other._storage[3]);
+    return r;
+  }
+
+  /// Extract 32-bit mask from x lane.
+  int get x => _storage[0];
+  /// Extract 32-bit mask from y lane.
+  int get y => _storage[1];
+  /// Extract 32-bit mask from z lane.
+  int get z => _storage[2];
+  /// Extract 32-bit mask from w lane.
+  int get w => _storage[3];
+
+  /// Extract the top bit from each lane return them in the first 4 bits.
+  int get signMask {
+    int mx = (_storage[0] & 0x80000000) >> 31;
+    int my = (_storage[1] & 0x80000000) >> 31;
+    int mz = (_storage[2] & 0x80000000) >> 31;
+    int mw = (_storage[3] & 0x80000000) >> 31;
+    return mx | my << 1 | mz << 2 | mw << 3;
+  }
+
+  /// Shuffle the lane values. [mask] must be one of the 256 shuffle constants.
+  Int32x4 shuffle(int mask) {
+    if ((mask < 0) || (mask > 255)) {
+      throw new RangeError('mask $mask must be in the range [0..256)');
+    }
+    int _x = _storage[mask & 0x3];
+    int _y = _storage[(mask >> 2) & 0x3];
+    int _z = _storage[(mask >> 4) & 0x3];
+    int _w = _storage[(mask >> 6) & 0x3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Shuffle the lane values in [this] and [other]. The returned
+  /// Int32x4 will have XY lanes from [this] and ZW lanes from [other].
+  /// Uses the same [mask] as [shuffle].
+  Int32x4 shuffleMix(NativeInt32x4 other, int mask) {
+    if ((mask < 0) || (mask > 255)) {
+      throw new RangeError('mask $mask must be in the range [0..256)');
+    }
+    int _x = _storage[mask & 0x3];
+    int _y = _storage[(mask >> 2) & 0x3];
+    int _z = other._storage[(mask >> 4) & 0x3];
+    int _w = other._storage[(mask >> 6) & 0x3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new x value.
+  Int32x4 withX(int x) {
+    int _x = x;
+    int _y = _storage[1];
+    int _z = _storage[2];
+    int _w = _storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new y value.
+  Int32x4 withY(int y) {
+    int _x = _storage[0];
+    int _y = y;
+    int _z = _storage[2];
+    int _w = _storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new z value.
+  Int32x4 withZ(int z) {
+    int _x = _storage[0];
+    int _y = _storage[1];
+    int _z = z;
+    int _w = _storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new w value.
+  Int32x4 withW(int w) {
+    int _x = _storage[0];
+    int _y = _storage[1];
+    int _z = _storage[2];
+    int _w = w;
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Extracted x value. Returns false for 0, true for any other value.
+  bool get flagX => _storage[0] != 0x0;
+  /// Extracted y value. Returns false for 0, true for any other value.
+  bool get flagY => _storage[1] != 0x0;
+  /// Extracted z value. Returns false for 0, true for any other value.
+  bool get flagZ => _storage[2] != 0x0;
+  /// Extracted w value. Returns false for 0, true for any other value.
+  bool get flagW => _storage[3] != 0x0;
+
+  /// Returns a new [Int32x4] copied from [this] with a new x value.
+  Int32x4 withFlagX(bool x) {
+    int _x = x == true ? 0xFFFFFFFF : 0x0;
+    int _y = _storage[1];
+    int _z = _storage[2];
+    int _w = _storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new y value.
+  Int32x4 withFlagY(bool y) {
+    int _x = _storage[0];
+    int _y = y == true ? 0xFFFFFFFF : 0x0;
+    int _z = _storage[2];
+    int _w = _storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new z value.
+  Int32x4 withFlagZ(bool z) {
+    int _x = _storage[0];
+    int _y = _storage[1];
+    int _z = z == true ? 0xFFFFFFFF : 0x0;
+    int _w = _storage[3];
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Returns a new [Int32x4] copied from [this] with a new w value.
+  Int32x4 withFlagW(bool w) {
+    int _x = _storage[0];
+    int _y = _storage[1];
+    int _z = _storage[2];
+    int _w = w == true ? 0xFFFFFFFF : 0x0;
+    return new NativeInt32x4(_x, _y, _z, _w);
+  }
+
+  /// Merge [trueValue] and [falseValue] based on [this]' bit mask:
+  /// Select bit from [trueValue] when bit in [this] is on.
+  /// Select bit from [falseValue] when bit in [this] is off.
+  Float32x4 select(NativeFloat32x4 trueValue, NativeFloat32x4 falseValue) {
+    var trueView = trueValue._storage.buffer.asInt32List();
+    var falseView = falseValue._storage.buffer.asInt32List();
+    int cmx = _storage[0];
+    int cmy = _storage[1];
+    int cmz = _storage[2];
+    int cmw = _storage[3];
+    int stx = trueView[0];
+    int sty = trueView[1];
+    int stz = trueView[2];
+    int stw = trueView[3];
+    int sfx = falseView[0];
+    int sfy = falseView[1];
+    int sfz = falseView[2];
+    int sfw = falseView[3];
+    int _x = (cmx & stx) | (~cmx & sfx);
+    int _y = (cmy & sty) | (~cmy & sfy);
+    int _z = (cmz & stz) | (~cmz & sfz);
+    int _w = (cmw & stw) | (~cmw & sfw);
+    var r = new NativeFloat32x4(0.0, 0.0, 0.0, 0.0);
+    var rView = r._storage.buffer.asInt32List();
+    rView[0] = _x;
+    rView[1] = _y;
+    rView[2] = _z;
+    rView[3] = _w;
+    return r;
+  }
+}
+
+class NativeFloat64x2 implements Float64x2 {
+  final _storage = new Float64List(2);
+
+  NativeFloat64x2(double x, double y) {
+    _storage[0] = x;
+    _storage[1] = y;
+  }
+
+  NativeFloat64x2.splat(double v) {
+    _storage[0] = v;
+    _storage[1] = v;
+  }
+
+  NativeFloat64x2.zero();
+
+  NativeFloat64x2.fromFloat32x4(NativeFloat32x4 v) {
+    _storage[0] = v._storage[0];
+    _storage[1] = v._storage[1];
+  }
+
+  String toString() {
+    return '[${_storage[0]}, ${_storage[1]}]';
+  }
+
+  /// Addition operator.
+  Float64x2 operator+(NativeFloat64x2 other) {
+    return new NativeFloat64x2(_storage[0] + other._storage[0],
+                               _storage[1] + other._storage[1]);
+  }
+
+  /// Negate operator.
+  Float64x2 operator-() {
+    return new NativeFloat64x2(-_storage[0], -_storage[1]);
+  }
+
+  /// Subtraction operator.
+  Float64x2 operator-(NativeFloat64x2 other) {
+    return new NativeFloat64x2(_storage[0] - other._storage[0],
+                               _storage[1] - other._storage[1]);
+  }
+  /// Multiplication operator.
+  Float64x2 operator*(NativeFloat64x2 other) {
+    return new NativeFloat64x2(_storage[0] * other._storage[0],
+                          _storage[1] * other._storage[1]);
+  }
+  /// Division operator.
+  Float64x2 operator/(NativeFloat64x2 other) {
+    return new NativeFloat64x2(_storage[0] / other._storage[0],
+                          _storage[1] / other._storage[1]);
+  }
+
+  /// Returns a copy of [this] each lane being scaled by [s].
+  Float64x2 scale(double s) {
+    return new NativeFloat64x2(_storage[0] * s, _storage[1] * s);
+  }
+
+  /// Returns the absolute value of this [Float64x2].
+  Float64x2 abs() {
+    return new NativeFloat64x2(_storage[0].abs(), _storage[1].abs());
+  }
+
+  /// Clamps [this] to be in the range [lowerLimit]-[upperLimit].
+  Float64x2 clamp(NativeFloat64x2 lowerLimit,
+                  NativeFloat64x2 upperLimit) {
+    double _lx = lowerLimit._storage[0];
+    double _ly = lowerLimit._storage[1];
+    double _ux = upperLimit._storage[0];
+    double _uy = upperLimit._storage[1];
+    double _x = _storage[0];
+    double _y = _storage[1];
+    // MAX(MIN(self, upper), lower).
+    _x = _x > _ux ? _ux : _x;
+    _y = _y > _uy ? _uy : _y;
+    _x = _x < _lx ? _lx : _x;
+    _y = _y < _ly ? _ly : _y;
+    return new NativeFloat64x2(_x, _y);
+  }
+
+  /// Extracted x value.
+  double get x => _storage[0];
+  /// Extracted y value.
+  double get y => _storage[1];
+
+  /// Extract the sign bits from each lane return them in the first 2 bits.
+  int get signMask {
+    var view = _storage.buffer.asUint32List();
+    var mx = (view[1] & 0x80000000) >> 31;
+    var my = (view[3] & 0x80000000) >> 31;
+    return mx | my << 1;
+  }
+
+  /// Returns a new [Float64x2] copied from [this] with a new x value.
+  Float64x2 withX(double x) {
+    return new NativeFloat64x2(x, _storage[1]);
+  }
+
+  /// Returns a new [Float64x2] copied from [this] with a new y value.
+  Float64x2 withY(double y) {
+    return new NativeFloat64x2(_storage[0], y);
+  }
+
+  /// Returns the lane-wise minimum value in [this] or [other].
+  Float64x2 min(NativeFloat64x2 other) {
+    return new NativeFloat64x2(
+        _storage[0] < other._storage[0] ? _storage[0] : other._storage[0],
+        _storage[1] < other._storage[1] ? _storage[1] : other._storage[1]);
+
+  }
+
+  /// Returns the lane-wise maximum value in [this] or [other].
+  Float64x2 max(NativeFloat64x2 other) {
+    return new NativeFloat64x2(
+        _storage[0] > other._storage[0] ? _storage[0] : other._storage[0],
+        _storage[1] > other._storage[1] ? _storage[1] : other._storage[1]);
+  }
+
+  /// Returns the lane-wise square root of [this].
+  Float64x2 sqrt() {
+    return new NativeFloat64x2(Math.sqrt(_storage[0]), Math.sqrt(_storage[1]));
+  }
+}