1// Copyright 2008 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28function unsignedShiftRight(val, shift) {
29  return val >>> shift;
30}
31
32assertEquals(        15, unsignedShiftRight(15, 0), "15 >>> 0");
33assertEquals(         7, unsignedShiftRight(15, 1), "15 >>> 1");
34assertEquals(         3, unsignedShiftRight(15, 2), "15 >>> 2");
35
36assertEquals(4294967288, unsignedShiftRight(-8, 0), "-8 >>> 0");
37assertEquals(2147483644, unsignedShiftRight(-8, 1), "-8 >>> 1");
38assertEquals(1073741822, unsignedShiftRight(-8, 2), "-8 >>> 2");
39
40assertEquals(         1, unsignedShiftRight(-8, 31), "-8 >>> 31");
41assertEquals(4294967288, unsignedShiftRight(-8, 32), "-8 >>> 32");
42assertEquals(2147483644, unsignedShiftRight(-8, 33), "-8 >>> 33");
43assertEquals(1073741822, unsignedShiftRight(-8, 34), "-8 >>> 34");
44
45assertEquals(2147483648, unsignedShiftRight(0x80000000, 0), "0x80000000 >>> 0");
46assertEquals(1073741824, unsignedShiftRight(0x80000000, 1), "0x80000000 >>> 1");
47assertEquals( 536870912, unsignedShiftRight(0x80000000, 2), "0x80000000 >>> 2");
48
49assertEquals(1073741824, unsignedShiftRight(0x40000000, 0), "0x40000000 >>> 0");
50assertEquals( 536870912, unsignedShiftRight(0x40000000, 1), "0x40000000 >>> 1");
51assertEquals( 268435456, unsignedShiftRight(0x40000000, 2), "0x40000000 >>> 2");
52