Revert of Remove SIMD.js from V8.

test/mjsunit/double-equals.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --harmony-simd
+
 /**
  * This test uses assert{True,False}(... == ...) instead of
  * assertEquals(..., ...) to not rely on the details of the
  * implementation of assertEquals.
  */
 
 function testEqual(a, b) {
   assertTrue(a == b);
   assertTrue(b == a);
   assertFalse(a != b);
@@ skipping 195 matching lines @@
 }
 testBadConversion(0);
 testBadConversion("string");
 testBadConversion(true);
 
 var s = Symbol();
 testEqual(s, s);
 testEqual(Object(s), s);
 testEqual(new Wrapper(s), s);
 testNotEqual(Object(s), Object(s));
+
+var simd = SIMD.Float32x4(1, 2, 3, 4);
+testEqual(simd, simd);
+testEqual(Object(simd), simd);
+testEqual(new Wrapper(simd), simd);
+testNotEqual(Object(simd), Object(simd));