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sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
52 lines
2.7 KiB
JavaScript
52 lines
2.7 KiB
JavaScript
// Copyright 2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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function unsignedShiftRight(val, shift) {
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return val >>> shift;
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}
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assertEquals( 15, unsignedShiftRight(15, 0), "15 >>> 0");
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assertEquals( 7, unsignedShiftRight(15, 1), "15 >>> 1");
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assertEquals( 3, unsignedShiftRight(15, 2), "15 >>> 2");
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assertEquals(4294967288, unsignedShiftRight(-8, 0), "-8 >>> 0");
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assertEquals(2147483644, unsignedShiftRight(-8, 1), "-8 >>> 1");
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assertEquals(1073741822, unsignedShiftRight(-8, 2), "-8 >>> 2");
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assertEquals( 1, unsignedShiftRight(-8, 31), "-8 >>> 31");
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assertEquals(4294967288, unsignedShiftRight(-8, 32), "-8 >>> 32");
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assertEquals(2147483644, unsignedShiftRight(-8, 33), "-8 >>> 33");
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assertEquals(1073741822, unsignedShiftRight(-8, 34), "-8 >>> 34");
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assertEquals(2147483648, unsignedShiftRight(0x80000000, 0), "0x80000000 >>> 0");
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assertEquals(1073741824, unsignedShiftRight(0x80000000, 1), "0x80000000 >>> 1");
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assertEquals( 536870912, unsignedShiftRight(0x80000000, 2), "0x80000000 >>> 2");
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assertEquals(1073741824, unsignedShiftRight(0x40000000, 0), "0x40000000 >>> 0");
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assertEquals( 536870912, unsignedShiftRight(0x40000000, 1), "0x40000000 >>> 1");
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assertEquals( 268435456, unsignedShiftRight(0x40000000, 2), "0x40000000 >>> 2");
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