Add signMask getter to Float32x4

runtime/lib/typed_data.dart

 // 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.
 
 // patch classes for Int8List ..... Float64List and ByteData implementations.
 
 patch class Int8List {
   /* patch */ factory Int8List(int length) {
     return new _Int8Array(length);
   }
@@ skipping 2004 matching lines @@
                          Float32x4 upperLimit) {
     return _clamp(lowerLimit, upperLimit);
   }
   Float32x4 _clamp(Float32x4 lowerLimit,
                           Float32x4 upperLimit)
       native "Float32x4_clamp";
   double get x native "Float32x4_getX";
   double get y native "Float32x4_getY";
   double get z native "Float32x4_getZ";
   double get w native "Float32x4_getW";
+  int get signMask native "Float32x4_getSignMask";
   Float32x4 get xxxx => _shuffle(0x0);
   Float32x4 get xxxy => _shuffle(0x40);
   Float32x4 get xxxz => _shuffle(0x80);
   Float32x4 get xxxw => _shuffle(0xC0);
   Float32x4 get xxyx => _shuffle(0x10);
   Float32x4 get xxyy => _shuffle(0x50);
   Float32x4 get xxyz => _shuffle(0x90);
   Float32x4 get xxyw => _shuffle(0xD0);
   Float32x4 get xxzx => _shuffle(0x20);
   Float32x4 get xxzy => _shuffle(0x60);
@@ skipping 1350 matching lines @@
     return value;
   }
   return object;
 }
 
 
 void _throwRangeError(int index, int length) {
   String message = "$index must be in the range [0..$length)";
   throw new RangeError(message);
 }