// 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;

import 'dart:collection';
import 'dart:_collection-dev';
import 'dart:_js_helper' show Creates, JavaScriptIndexingBehavior, JSName, Null, Returns;
import 'dart:_foreign_helper' show JS, JS_CONST;
import 'dart:math' as Math;

/**
 * Describes endianness to be used when accessing a sequence of bytes.
 */
class Endianness {
  const Endianness(this._littleEndian);

  static const Endianness BIG_ENDIAN = const Endianness(false);
  static const Endianness LITTLE_ENDIAN = const Endianness(true);
  static final Endianness HOST_ENDIAN =
    (new ByteData.view(new Int16List.fromList([1]).buffer)).getInt8(0) == 1 ?
    LITTLE_ENDIAN : BIG_ENDIAN;

  final bool _littleEndian;
}


class ByteBuffer native "ArrayBuffer" {
  @JSName('byteLength')
  final int lengthInBytes;
}

// TODO(12929): Remove this constant once V8 optimizes length access of
// typed arrays. Firefox does not like accessing a named property of a
// typed array, so we only use the new [:$dartCachedLength:] property in V8 and
// Chrome.
const fetchLength = const JS_CONST(r'''
    ((typeof version == "function" && typeof os == "object" && "system" in os)
    || (typeof navigator == "object"
        && navigator.userAgent.indexOf('Chrome') != -1))
        ? function(x) { return x.$dartCachedLength || x.length; }
        : function(x) { return x.length; };
''');

class TypedData native "ArrayBufferView" {
  @Creates('ByteBuffer')
  @Returns('ByteBuffer|Null')
  final ByteBuffer buffer;

  @JSName('byteLength')
  final int lengthInBytes;

  @JSName('byteOffset')
  final int offsetInBytes;

  @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) || index >= length) {
      _invalidIndex(index, length);
    }
  }

  // TODO(12929): Remove this method once V8 optimizes length access of
  // typed arrays.
  void _setCachedLength() {
    JS('void', r'#.$dartCachedLength = #.length', this, this);
  }

  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 incides 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;
  }
}


// Ensures that [list] is a JavaScript Array or a typed array.  If necessary,
// returns a copy of the list.
List _ensureNativeList(List list) {
  return list;  // TODO: make sure.
}


class ByteData extends TypedData native "DataView" {
  factory ByteData(int length) => _create1(length);

  factory ByteData.view(ByteBuffer buffer,
                        [int byteOffset = 0, int byteLength]) =>
      byteLength == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, byteLength);

  num getFloat32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _getFloat32(byteOffset, endian._littleEndian);

  @JSName('getFloat32')
  @Returns('num')
  num _getFloat32(int byteOffset, [bool littleEndian]) native;

  num getFloat64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _getFloat64(byteOffset, endian._littleEndian);

  @JSName('getFloat64')
  @Returns('num')
  num _getFloat64(int byteOffset, [bool littleEndian]) native;

  int getInt16(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _getInt16(byteOffset, endian._littleEndian);

  @JSName('getInt16')
  @Returns('int')
  int _getInt16(int byteOffset, [bool littleEndian]) native;

  int getInt32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _getInt32(byteOffset, endian._littleEndian);

  @JSName('getInt32')
  @Returns('int')
  int _getInt32(int byteOffset, [bool littleEndian]) native;

  int getInt64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) {
    throw new UnsupportedError("Int64 accessor not supported by dart2js.");
  }

  int getInt8(int byteOffset) native;

  int getUint16(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _getUint16(byteOffset, endian._littleEndian);

  @JSName('getUint16')
  @Returns('int')
  int _getUint16(int byteOffset, [bool littleEndian]) native;

  int getUint32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _getUint32(byteOffset, endian._littleEndian);

  @JSName('getUint32')
  @Returns('int')
  int _getUint32(int byteOffset, [bool littleEndian]) native;

  int getUint64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) {
    throw new UnsupportedError("Uint64 accessor not supported by dart2js.");
  }

  int getUint8(int byteOffset) native;

  void setFloat32(int byteOffset, num value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _setFloat32(byteOffset, value, endian._littleEndian);

  @JSName('setFloat32')
  void _setFloat32(int byteOffset, num value, [bool littleEndian]) native;

  void setFloat64(int byteOffset, num value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _setFloat64(byteOffset, value, endian._littleEndian);

  @JSName('setFloat64')
  void _setFloat64(int byteOffset, num value, [bool littleEndian]) native;

  void setInt16(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _setInt16(byteOffset, value, endian._littleEndian);

  @JSName('setInt16')
  void _setInt16(int byteOffset, int value, [bool littleEndian]) native;

  void setInt32(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _setInt32(byteOffset, value, endian._littleEndian);

  @JSName('setInt32')
  void _setInt32(int byteOffset, int value, [bool littleEndian]) native;

  void setInt64(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) {
    throw new UnsupportedError("Int64 accessor not supported by dart2js.");
  }

  void setInt8(int byteOffset, int value) native;

  void setUint16(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _setUint16(byteOffset, value, endian._littleEndian);

  @JSName('setUint16')
  void _setUint16(int byteOffset, int value, [bool littleEndian]) native;

  void setUint32(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
      _setUint32(byteOffset, value, endian._littleEndian);

  @JSName('setUint32')
  void _setUint32(int byteOffset, int value, [bool littleEndian]) native;

  void setUint64(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) {
    throw new UnsupportedError("Uint64 accessor not supported by dart2js.");
  }

  void setUint8(int byteOffset, int value) native;

  static ByteData _create1(arg) =>
      JS('ByteData', 'new DataView(new ArrayBuffer(#))', arg).._setCachedLength();

  static ByteData _create2(arg1, arg2) =>
      JS('ByteData', 'new DataView(#, #)', arg1, arg2).._setCachedLength();

  static ByteData _create3(arg1, arg2, arg3) =>
      JS('ByteData', 'new DataView(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Float32List
    extends TypedData with ListMixin<double>, FixedLengthListMixin<double>
    implements JavaScriptIndexingBehavior, List<double>
    native "Float32Array" {
  factory Float32List(int length) => _create1(length);

  factory Float32List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Float32List.view(ByteBuffer buffer,
                           [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 4;

  int get length => JS("int", '#(#)', fetchLength, this);

  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);
  }

  List<double> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Float32List', '#.subarray(#, #)', this, start, end);
    source._setCachedLength();
    return _create1(source);
  }

  static Float32List _create1(arg) =>
      JS('Float32List', 'new Float32Array(#)', arg).._setCachedLength();

  static Float32List _create2(arg1, arg2) =>
      JS('Float32List', 'new Float32Array(#, #)', arg1, arg2)
          .._setCachedLength();

  static Float32List _create3(arg1, arg2, arg3) =>
      JS('Float32List', 'new Float32Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Float64List
    extends TypedData with ListMixin<double>, FixedLengthListMixin<double>
    implements JavaScriptIndexingBehavior, List<double>
    native "Float64Array" {
  factory Float64List(int length) => _create1(length);

  factory Float64List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Float64List.view(ByteBuffer buffer,
                           [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 8;

  int get length => JS("int", '#(#)', fetchLength, this);

  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);
  }

  List<double> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Float64List', '#.subarray(#, #)', this, start, end);
    source._setCachedLength();
    return _create1(source);
  }

  static Float64List _create1(arg) {
    return JS('Float64List', 'new Float64Array(#)', arg).._setCachedLength();
  }

  static Float64List _create2(arg1, arg2) {
    return JS('Float64List', 'new Float64Array(#, #)', arg1, arg2)
        .._setCachedLength();
  }

  static Float64List _create3(arg1, arg2, arg3) {
    return JS('Float64List', 'new Float64Array(#, #, #)', arg1, arg2, arg3)
        .._setCachedLength();
  }
}


class Int16List
    extends TypedData with ListMixin<int>, FixedLengthListMixin<int>
    implements JavaScriptIndexingBehavior, List<int>
    native "Int16Array" {
  factory Int16List(int length) => _create1(length);

  factory Int16List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Int16List.view(ByteBuffer buffer, [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 2;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Int16List', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Int16List _create1(arg) =>
      JS('Int16List', 'new Int16Array(#)', arg).._setCachedLength();

  static Int16List _create2(arg1, arg2) =>
      JS('Int16List', 'new Int16Array(#, #)', arg1, arg2).._setCachedLength();

  static Int16List _create3(arg1, arg2, arg3) =>
      JS('Int16List', 'new Int16Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Int32List
    extends TypedData with ListMixin<int>, FixedLengthListMixin<int>
    implements JavaScriptIndexingBehavior, List<int>
    native "Int32Array" {
  factory Int32List(int length) => _create1(length);

  factory Int32List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Int32List.view(ByteBuffer buffer, [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 4;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Int32List', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Int32List _create1(arg) =>
      JS('Int32List', 'new Int32Array(#)', arg).._setCachedLength();

  static Int32List _create2(arg1, arg2) =>
      JS('Int32List', 'new Int32Array(#, #)', arg1, arg2).._setCachedLength();

  static Int32List _create3(arg1, arg2, arg3) =>
      JS('Int32List', 'new Int32Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Int8List
    extends TypedData with ListMixin<int>, FixedLengthListMixin<int>
    implements JavaScriptIndexingBehavior, List<int>
    native "Int8Array" {
  factory Int8List(int length) => _create1(length);

  factory Int8List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Int8List.view(ByteBuffer buffer, [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 1;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Int8List', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Int8List _create1(arg) =>
      JS('Int8List', 'new Int8Array(#)', arg).._setCachedLength();

  static Int8List _create2(arg1, arg2) =>
      JS('Int8List', 'new Int8Array(#, #)', arg1, arg2).._setCachedLength();

  static Int8List _create3(arg1, arg2, arg3) =>
      JS('Int8List', 'new Int8Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Uint16List
    extends TypedData with ListMixin<int>, FixedLengthListMixin<int>
    implements JavaScriptIndexingBehavior, List<int>
    native "Uint16Array" {
  factory Uint16List(int length) => _create1(length);

  factory Uint16List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Uint16List.view(ByteBuffer buffer,
                          [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 2;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Uint16List', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Uint16List _create1(arg) =>
      JS('Uint16List', 'new Uint16Array(#)', arg).._setCachedLength();

  static Uint16List _create2(arg1, arg2) =>
      JS('Uint16List', 'new Uint16Array(#, #)', arg1, arg2).._setCachedLength();

  static Uint16List _create3(arg1, arg2, arg3) =>
      JS('Uint16List', 'new Uint16Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Uint32List
    extends TypedData with ListMixin<int>, FixedLengthListMixin<int>
    implements JavaScriptIndexingBehavior, List<int>
    native "Uint32Array" {
  factory Uint32List(int length) => _create1(length);

  factory Uint32List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Uint32List.view(ByteBuffer buffer,
                          [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 4;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Uint32List', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Uint32List _create1(arg) =>
      JS('Uint32List', 'new Uint32Array(#)', arg).._setCachedLength();

  static Uint32List _create2(arg1, arg2) =>
      JS('Uint32List', 'new Uint32Array(#, #)', arg1, arg2).._setCachedLength();

  static Uint32List _create3(arg1, arg2, arg3) =>
      JS('Uint32List', 'new Uint32Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Uint8ClampedList extends TypedData with ListMixin<int>,
    FixedLengthListMixin<int> implements JavaScriptIndexingBehavior, List<int>
    native "Uint8ClampedArray,CanvasPixelArray" {
  factory Uint8ClampedList(int length) => _create1(length);

  factory Uint8ClampedList.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Uint8ClampedList.view(ByteBuffer buffer,
                                [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 1;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Uint8ClampedList', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Uint8ClampedList _create1(arg) =>
      JS('Uint8ClampedList', 'new Uint8ClampedArray(#)', arg)
          .._setCachedLength();

  static Uint8ClampedList _create2(arg1, arg2) =>
      JS('Uint8ClampedList', 'new Uint8ClampedArray(#, #)', arg1, arg2)
          .._setCachedLength();

  static Uint8ClampedList _create3(arg1, arg2, arg3) =>
      JS('Uint8ClampedList', 'new Uint8ClampedArray(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Uint8List
    extends TypedData with ListMixin<int>, FixedLengthListMixin<int>
    implements JavaScriptIndexingBehavior, List<int>
    // 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 Uint8List(int length) => _create1(length);

  factory Uint8List.fromList(List<num> list) =>
      _create1(_ensureNativeList(list));

  factory Uint8List.view(ByteBuffer buffer,
                         [int byteOffset = 0, int length]) =>
      length == null
          ? _create2(buffer, byteOffset)
          : _create3(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 1;

  int get length => JS("int", '#(#)', fetchLength, this);

  int operator[](int index) {
    _checkIndex(index, length);
    return JS("int", "#[#]", this, index);
  }

  void operator[]=(int index, int value) {
    _checkIndex(index, length);
    JS("void", "#[#] = #", this, index, value);
  }

  List<int> sublist(int start, [int end]) {
    end = _checkSublistArguments(start, end, length);
    var source = JS('Uint8List', '#.subarray(#, #)', this, start, end)
        .._setCachedLength();
    return _create1(source);
  }

  static Uint8List _create1(arg) =>
      JS('Uint8List', 'new Uint8Array(#)', arg).._setCachedLength();

  static Uint8List _create2(arg1, arg2) =>
      JS('Uint8List', 'new Uint8Array(#, #)', arg1, arg2).._setCachedLength();

  static Uint8List _create3(arg1, arg2, arg3) =>
      JS('Uint8List', 'new Uint8Array(#, #, #)', arg1, arg2, arg3)
          .._setCachedLength();
}


class Int64List extends TypedData implements JavaScriptIndexingBehavior, List<int> {
  factory Int64List(int length) {
    throw new UnsupportedError("Int64List not supported by dart2js.");
  }

  factory Int64List.fromList(List<int> list) {
    throw new UnsupportedError("Int64List not supported by dart2js.");
  }

  factory Int64List.view(ByteBuffer buffer, [int byteOffset, int length]) {
    throw new UnsupportedError("Int64List not supported by dart2js.");
  }

  static const int BYTES_PER_ELEMENT = 8;
}


class Uint64List extends TypedData implements JavaScriptIndexingBehavior, List<int> {
  factory Uint64List(int length) {
    throw new UnsupportedError("Uint64List not supported by dart2js.");
  }

  factory Uint64List.fromList(List<int> list) {
    throw new UnsupportedError("Uint64List not supported by dart2js.");
  }

  factory Uint64List.view(ByteBuffer buffer, [int byteOffset, int length]) {
    throw new UnsupportedError("Uint64List not supported by dart2js.");
  }

  static const int BYTES_PER_ELEMENT = 8;
}


class Float32x4List
    extends Object with ListMixin<Float32x4>, FixedLengthListMixin<Float32x4>
    implements List<Float32x4>, TypedData {

  final Float32List _storage;

  ByteBuffer get buffer => _storage.buffer;

  int get lengthInBytes => _storage.lengthInBytes;

  int get offsetInBytes => _storage.offsetInBytes;

  final int elementSizeInBytes = 16;

  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 incides 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;
  }

  Float32x4List(int length) : _storage = new Float32List(length*4);

  Float32x4List._externalStorage(Float32List storage) : _storage = storage;

  Float32x4List._slowFromList(List<Float32x4> list)
      : _storage = new Float32List(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;
    }
  }

  factory Float32x4List.fromList(List<Float32x4> list) {
    if (list is Float32x4List) {
      Float32x4List nativeList = list as Float32x4List;
      return new Float32x4List._externalStorage(
          new Float32List.fromList(nativeList._storage));
    } else {
      return new Float32x4List._slowFromList(list);
    }
  }

  Float32x4List.view(ByteBuffer buffer,
                     [int byteOffset = 0, int length])
      : _storage = new Float32List.view(buffer, byteOffset, length);

  static const int BYTES_PER_ELEMENT = 16;

  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, Float32x4 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 Float32x4List._externalStorage(_storage.sublist(start*4, end*4));
  }
}


class Float32x4 {
  final _storage = new Float32List(4);

  Float32x4(double x, double y, double z, double w) {
    _storage[0] = x;
    _storage[1] = y;
    _storage[2] = z;
    _storage[3] = w;
  }
  Float32x4.splat(double v) {
    _storage[0] = v;
    _storage[1] = v;
    _storage[2] = v;
    _storage[3] = v;
  }
  Float32x4.zero();
  /// Returns a bit-wise copy of [x] as a Float32x4.
  Float32x4.fromUint32x4Bits(Uint32x4 x) {
    var view = new Float32List.view(x._storage.buffer);
    _storage[0] = view[0];
    _storage[1] = view[1];
    _storage[2] = view[2];
    _storage[3] = view[3];
  }

   /// Addition operator.
  Float32x4 operator+(Float32x4 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 Float32x4(_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 Float32x4(_x, _y, _z, _w);
  }

  /// Subtraction operator.
  Float32x4 operator-(Float32x4 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 Float32x4(_x, _y, _z, _w);
  }

  /// Multiplication operator.
  Float32x4 operator*(Float32x4 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 Float32x4(_x, _y, _z, _w);
  }

  /// Division operator.
  Float32x4 operator/(Float32x4 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 Float32x4(_x, _y, _z, _w);
  }

  /// Relational less than.
  Uint32x4 lessThan(Float32x4 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 Uint32x4(_cx == true ? 0xFFFFFFFF : 0x0,
                        _cy == true ? 0xFFFFFFFF : 0x0,
                        _cz == true ? 0xFFFFFFFF : 0x0,
                        _cw == true ? 0xFFFFFFFF : 0x0);
  }

  /// Relational less than or equal.
  Uint32x4 lessThanOrEqual(Float32x4 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 Uint32x4(_cx == true ? 0xFFFFFFFF : 0x0,
                        _cy == true ? 0xFFFFFFFF : 0x0,
                        _cz == true ? 0xFFFFFFFF : 0x0,
                        _cw == true ? 0xFFFFFFFF : 0x0);
  }

  /// Relational greater than.
  Uint32x4 greaterThan(Float32x4 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 Uint32x4(_cx == true ? 0xFFFFFFFF : 0x0,
                        _cy == true ? 0xFFFFFFFF : 0x0,
                        _cz == true ? 0xFFFFFFFF : 0x0,
                        _cw == true ? 0xFFFFFFFF : 0x0);
  }

  /// Relational greater than or equal.
  Uint32x4 greaterThanOrEqual(Float32x4 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 Uint32x4(_cx == true ? 0xFFFFFFFF : 0x0,
                        _cy == true ? 0xFFFFFFFF : 0x0,
                        _cz == true ? 0xFFFFFFFF : 0x0,
                        _cw == true ? 0xFFFFFFFF : 0x0);
  }

  /// Relational equal.
  Uint32x4 equal(Float32x4 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 Uint32x4(_cx == true ? 0xFFFFFFFF : 0x0,
                        _cy == true ? 0xFFFFFFFF : 0x0,
                        _cz == true ? 0xFFFFFFFF : 0x0,
                        _cw == true ? 0xFFFFFFFF : 0x0);
  }

  /// Relational not-equal.
  Uint32x4 notEqual(Float32x4 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 Uint32x4(_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 Float32x4(_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].
  Float32x4 clamp(Float32x4 lowerLimit, Float32x4 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 Uint32List.view(_storage.buffer);
    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;
  }

  /// Mask passed to [shuffle].
  static const int XXXX = 0x0;
  static const int XXXY = 0x40;
  static const int XXXZ = 0x80;
  static const int XXXW = 0xC0;
  static const int XXYX = 0x10;
  static const int XXYY = 0x50;
  static const int XXYZ = 0x90;
  static const int XXYW = 0xD0;
  static const int XXZX = 0x20;
  static const int XXZY = 0x60;
  static const int XXZZ = 0xA0;
  static const int XXZW = 0xE0;
  static const int XXWX = 0x30;
  static const int XXWY = 0x70;
  static const int XXWZ = 0xB0;
  static const int XXWW = 0xF0;
  static const int XYXX = 0x4;
  static const int XYXY = 0x44;
  static const int XYXZ = 0x84;
  static const int XYXW = 0xC4;
  static const int XYYX = 0x14;
  static const int XYYY = 0x54;
  static const int XYYZ = 0x94;
  static const int XYYW = 0xD4;
  static const int XYZX = 0x24;
  static const int XYZY = 0x64;
  static const int XYZZ = 0xA4;
  static const int XYZW = 0xE4;
  static const int XYWX = 0x34;
  static const int XYWY = 0x74;
  static const int XYWZ = 0xB4;
  static const int XYWW = 0xF4;
  static const int XZXX = 0x8;
  static const int XZXY = 0x48;
  static const int XZXZ = 0x88;
  static const int XZXW = 0xC8;
  static const int XZYX = 0x18;
  static const int XZYY = 0x58;
  static const int XZYZ = 0x98;
  static const int XZYW = 0xD8;
  static const int XZZX = 0x28;
  static const int XZZY = 0x68;
  static const int XZZZ = 0xA8;
  static const int XZZW = 0xE8;
  static const int XZWX = 0x38;
  static const int XZWY = 0x78;
  static const int XZWZ = 0xB8;
  static const int XZWW = 0xF8;
  static const int XWXX = 0xC;
  static const int XWXY = 0x4C;
  static const int XWXZ = 0x8C;
  static const int XWXW = 0xCC;
  static const int XWYX = 0x1C;
  static const int XWYY = 0x5C;
  static const int XWYZ = 0x9C;
  static const int XWYW = 0xDC;
  static const int XWZX = 0x2C;
  static const int XWZY = 0x6C;
  static const int XWZZ = 0xAC;
  static const int XWZW = 0xEC;
  static const int XWWX = 0x3C;
  static const int XWWY = 0x7C;
  static const int XWWZ = 0xBC;
  static const int XWWW = 0xFC;
  static const int YXXX = 0x1;
  static const int YXXY = 0x41;
  static const int YXXZ = 0x81;
  static const int YXXW = 0xC1;
  static const int YXYX = 0x11;
  static const int YXYY = 0x51;
  static const int YXYZ = 0x91;
  static const int YXYW = 0xD1;
  static const int YXZX = 0x21;
  static const int YXZY = 0x61;
  static const int YXZZ = 0xA1;
  static const int YXZW = 0xE1;
  static const int YXWX = 0x31;
  static const int YXWY = 0x71;
  static const int YXWZ = 0xB1;
  static const int YXWW = 0xF1;
  static const int YYXX = 0x5;
  static const int YYXY = 0x45;
  static const int YYXZ = 0x85;
  static const int YYXW = 0xC5;
  static const int YYYX = 0x15;
  static const int YYYY = 0x55;
  static const int YYYZ = 0x95;
  static const int YYYW = 0xD5;
  static const int YYZX = 0x25;
  static const int YYZY = 0x65;
  static const int YYZZ = 0xA5;
  static const int YYZW = 0xE5;
  static const int YYWX = 0x35;
  static const int YYWY = 0x75;
  static const int YYWZ = 0xB5;
  static const int YYWW = 0xF5;
  static const int YZXX = 0x9;
  static const int YZXY = 0x49;
  static const int YZXZ = 0x89;
  static const int YZXW = 0xC9;
  static const int YZYX = 0x19;
  static const int YZYY = 0x59;
  static const int YZYZ = 0x99;
  static const int YZYW = 0xD9;
  static const int YZZX = 0x29;
  static const int YZZY = 0x69;
  static const int YZZZ = 0xA9;
  static const int YZZW = 0xE9;
  static const int YZWX = 0x39;
  static const int YZWY = 0x79;
  static const int YZWZ = 0xB9;
  static const int YZWW = 0xF9;
  static const int YWXX = 0xD;
  static const int YWXY = 0x4D;
  static const int YWXZ = 0x8D;
  static const int YWXW = 0xCD;
  static const int YWYX = 0x1D;
  static const int YWYY = 0x5D;
  static const int YWYZ = 0x9D;
  static const int YWYW = 0xDD;
  static const int YWZX = 0x2D;
  static const int YWZY = 0x6D;
  static const int YWZZ = 0xAD;
  static const int YWZW = 0xED;
  static const int YWWX = 0x3D;
  static const int YWWY = 0x7D;
  static const int YWWZ = 0xBD;
  static const int YWWW = 0xFD;
  static const int ZXXX = 0x2;
  static const int ZXXY = 0x42;
  static const int ZXXZ = 0x82;
  static const int ZXXW = 0xC2;
  static const int ZXYX = 0x12;
  static const int ZXYY = 0x52;
  static const int ZXYZ = 0x92;
  static const int ZXYW = 0xD2;
  static const int ZXZX = 0x22;
  static const int ZXZY = 0x62;
  static const int ZXZZ = 0xA2;
  static const int ZXZW = 0xE2;
  static const int ZXWX = 0x32;
  static const int ZXWY = 0x72;
  static const int ZXWZ = 0xB2;
  static const int ZXWW = 0xF2;
  static const int ZYXX = 0x6;
  static const int ZYXY = 0x46;
  static const int ZYXZ = 0x86;
  static const int ZYXW = 0xC6;
  static const int ZYYX = 0x16;
  static const int ZYYY = 0x56;
  static const int ZYYZ = 0x96;
  static const int ZYYW = 0xD6;
  static const int ZYZX = 0x26;
  static const int ZYZY = 0x66;
  static const int ZYZZ = 0xA6;
  static const int ZYZW = 0xE6;
  static const int ZYWX = 0x36;
  static const int ZYWY = 0x76;
  static const int ZYWZ = 0xB6;
  static const int ZYWW = 0xF6;
  static const int ZZXX = 0xA;
  static const int ZZXY = 0x4A;
  static const int ZZXZ = 0x8A;
  static const int ZZXW = 0xCA;
  static const int ZZYX = 0x1A;
  static const int ZZYY = 0x5A;
  static const int ZZYZ = 0x9A;
  static const int ZZYW = 0xDA;
  static const int ZZZX = 0x2A;
  static const int ZZZY = 0x6A;
  static const int ZZZZ = 0xAA;
  static const int ZZZW = 0xEA;
  static const int ZZWX = 0x3A;
  static const int ZZWY = 0x7A;
  static const int ZZWZ = 0xBA;
  static const int ZZWW = 0xFA;
  static const int ZWXX = 0xE;
  static const int ZWXY = 0x4E;
  static const int ZWXZ = 0x8E;
  static const int ZWXW = 0xCE;
  static const int ZWYX = 0x1E;
  static const int ZWYY = 0x5E;
  static const int ZWYZ = 0x9E;
  static const int ZWYW = 0xDE;
  static const int ZWZX = 0x2E;
  static const int ZWZY = 0x6E;
  static const int ZWZZ = 0xAE;
  static const int ZWZW = 0xEE;
  static const int ZWWX = 0x3E;
  static const int ZWWY = 0x7E;
  static const int ZWWZ = 0xBE;
  static const int ZWWW = 0xFE;
  static const int WXXX = 0x3;
  static const int WXXY = 0x43;
  static const int WXXZ = 0x83;
  static const int WXXW = 0xC3;
  static const int WXYX = 0x13;
  static const int WXYY = 0x53;
  static const int WXYZ = 0x93;
  static const int WXYW = 0xD3;
  static const int WXZX = 0x23;
  static const int WXZY = 0x63;
  static const int WXZZ = 0xA3;
  static const int WXZW = 0xE3;
  static const int WXWX = 0x33;
  static const int WXWY = 0x73;
  static const int WXWZ = 0xB3;
  static const int WXWW = 0xF3;
  static const int WYXX = 0x7;
  static const int WYXY = 0x47;
  static const int WYXZ = 0x87;
  static const int WYXW = 0xC7;
  static const int WYYX = 0x17;
  static const int WYYY = 0x57;
  static const int WYYZ = 0x97;
  static const int WYYW = 0xD7;
  static const int WYZX = 0x27;
  static const int WYZY = 0x67;
  static const int WYZZ = 0xA7;
  static const int WYZW = 0xE7;
  static const int WYWX = 0x37;
  static const int WYWY = 0x77;
  static const int WYWZ = 0xB7;
  static const int WYWW = 0xF7;
  static const int WZXX = 0xB;
  static const int WZXY = 0x4B;
  static const int WZXZ = 0x8B;
  static const int WZXW = 0xCB;
  static const int WZYX = 0x1B;
  static const int WZYY = 0x5B;
  static const int WZYZ = 0x9B;
  static const int WZYW = 0xDB;
  static const int WZZX = 0x2B;
  static const int WZZY = 0x6B;
  static const int WZZZ = 0xAB;
  static const int WZZW = 0xEB;
  static const int WZWX = 0x3B;
  static const int WZWY = 0x7B;
  static const int WZWZ = 0xBB;
  static const int WZWW = 0xFB;
  static const int WWXX = 0xF;
  static const int WWXY = 0x4F;
  static const int WWXZ = 0x8F;
  static const int WWXW = 0xCF;
  static const int WWYX = 0x1F;
  static const int WWYY = 0x5F;
  static const int WWYZ = 0x9F;
  static const int WWYW = 0xDF;
  static const int WWZX = 0x2F;
  static const int WWZY = 0x6F;
  static const int WWZZ = 0xAF;
  static const int WWZW = 0xEF;
  static const int WWWX = 0x3F;
  static const int WWWY = 0x7F;
  static const int WWWZ = 0xBF;
  static const int WWWW = 0xFF;

  /// 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 Float32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Float32x4] with values in the X and Y lanes
  /// replaced with the values in the Z and W lanes of [other].
  Float32x4 withZWInXY(Float32x4 other) {
    double _x = other._storage[2];
    double _y = other._storage[3];
    double _z = _storage[2];
    double _w = _storage[3];
    return new Float32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Float32x4] with the X and Y lane values
  /// from [this] and [other] interleaved.
  Float32x4 interleaveXY(Float32x4 other) {
    double _x = _storage[0];
    double _y = other._storage[0];
    double _z = _storage[1];
    double _w = other._storage[1];
    return new Float32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Float32x4] with the Z and W lane values
  /// from [this] and [other] interleaved.
  Float32x4 interleaveZW(Float32x4 other) {
    double _x = _storage[2];
    double _y = other._storage[2];
    double _z = _storage[3];
    double _w = other._storage[3];
    return new Float32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Float32x4] with the X and Y lane value pairs
  /// from [this] and [other] interleaved.
  Float32x4 interleaveXYPairs(Float32x4 other) {
    double _x = _storage[0];
    double _y = _storage[1];
    double _z = other._storage[0];
    double _w = other._storage[1];
    return new Float32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Float32x4] with the Z and W lane value pairs
  /// from [this] and [other] interleaved.
  Float32x4 interleaveZWPairs(Float32x4 other) {
    double _x = _storage[2];
    double _y = _storage[3];
    double _z = other._storage[2];
    double _w = other._storage[3];
    return new Float32x4(_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 Float32x4(_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 Float32x4(_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 Float32x4(_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 Float32x4(_x, _y, _z, _w);
  }

  /// Returns the lane-wise minimum value in [this] or [other].
  Float32x4 min(Float32x4 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 Float32x4(_x, _y, _z, _w);
  }

  /// Returns the lane-wise maximum value in [this] or [other].
  Float32x4 max(Float32x4 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 Float32x4(_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 Float32x4(_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 Float32x4(_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 Float32x4(_x, _y, _z, _w);
  }
}


class Uint32x4 {
  final _storage = new Uint32List(4);

  Uint32x4(int x, int y, int z, int w) {
    _storage[0] = x;
    _storage[1] = y;
    _storage[2] = z;
    _storage[3] = w;
  }

  Uint32x4.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 Uint32x4.
  Uint32x4.fromFloat32x4Bits(Float32x4 x) {
    var view = new Uint32List.view(x._storage.buffer);
    _storage[0] = view[0];
    _storage[1] = view[1];
    _storage[2] = view[2];
    _storage[3] = view[3];
  }

  /// The bit-wise or operator.
  Uint32x4 operator|(Uint32x4 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 Uint32x4(_x, _y, _z, _w);
  }

  /// The bit-wise and operator.
  Uint32x4 operator&(Uint32x4 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 Uint32x4(_x, _y, _z, _w);
  }

  /// The bit-wise xor operator.
  Uint32x4 operator^(Uint32x4 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 Uint32x4(_x, _y, _z, _w);
  }

  Uint32x4 operator+(Uint32x4 other) {
    var r = new Uint32x4(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;
  }

  Uint32x4 operator-(Uint32x4 other) {
    var r = new Uint32x4(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;
  }

  /// Returns a new [Uint32x4] copied from [this] with a new x value.
  Uint32x4 withX(int x) {
    int _x = x;
    int _y = _storage[1];
    int _z = _storage[2];
    int _w = _storage[3];
    return new Uint32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Uint32x4] copied from [this] with a new y value.
  Uint32x4 withY(int y) {
    int _x = _storage[0];
    int _y = y;
    int _z = _storage[2];
    int _w = _storage[3];
    return new Uint32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Uint32x4] copied from [this] with a new z value.
  Uint32x4 withZ(int z) {
    int _x = _storage[0];
    int _y = _storage[1];
    int _z = z;
    int _w = _storage[3];
    return new Uint32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Uint32x4] copied from [this] with a new w value.
  Uint32x4 withW(int w) {
    int _x = _storage[0];
    int _y = _storage[1];
    int _z = _storage[2];
    int _w = w;
    return new Uint32x4(_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 [Uint32x4] copied from [this] with a new x value.
  Uint32x4 withFlagX(bool x) {
    int _x = x == true ? 0xFFFFFFFF : 0x0;
    int _y = _storage[1];
    int _z = _storage[2];
    int _w = _storage[3];
    return new Uint32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Uint32x4] copied from [this] with a new y value.
  Uint32x4 withFlagY(bool y) {
    int _x = _storage[0];
    int _y = y == true ? 0xFFFFFFFF : 0x0;
    int _z = _storage[2];
    int _w = _storage[3];
    return new Uint32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Uint32x4] copied from [this] with a new z value.
  Uint32x4 withFlagZ(bool z) {
    int _x = _storage[0];
    int _y = _storage[1];
    int _z = z == true ? 0xFFFFFFFF : 0x0;
    int _w = _storage[3];
    return new Uint32x4(_x, _y, _z, _w);
  }

  /// Returns a new [Uint32x4] copied from [this] with a new w value.
  Uint32x4 withFlagW(bool w) {
    int _x = _storage[0];
    int _y = _storage[1];
    int _z = _storage[2];
    int _w = w == true ? 0xFFFFFFFF : 0x0;
    return new Uint32x4(_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(Float32x4 trueValue, Float32x4 falseValue) {
    var trueView = new Uint32List.view(trueValue._storage.buffer);
    var falseView = new Uint32List.view(falseValue._storage.buffer);
    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 Float32x4(0.0, 0.0, 0.0, 0.0);
    var rView = new Uint32List.view(r._storage.buffer);
    rView[0] = _x;
    rView[1] = _y;
    rView[2] = _z;
    rView[3] = _w;
    return r;
  }
}