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 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"); 52