blob: e42728fc50f144e6b998429b50a71ac131d2c375 [file] [log] [blame]
Steve Blocka7e24c12009-10-30 11:49:00 +00001// 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
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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");