| // 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. |
| |
| function unsignedShiftRight(val, shift) { |
| return val >>> shift; |
| } |
| |
| assertEquals( 15, unsignedShiftRight(15, 0), "15 >>> 0"); |
| assertEquals( 7, unsignedShiftRight(15, 1), "15 >>> 1"); |
| assertEquals( 3, unsignedShiftRight(15, 2), "15 >>> 2"); |
| |
| assertEquals(4294967288, unsignedShiftRight(-8, 0), "-8 >>> 0"); |
| assertEquals(2147483644, unsignedShiftRight(-8, 1), "-8 >>> 1"); |
| assertEquals(1073741822, unsignedShiftRight(-8, 2), "-8 >>> 2"); |
| |
| assertEquals( 1, unsignedShiftRight(-8, 31), "-8 >>> 31"); |
| assertEquals(4294967288, unsignedShiftRight(-8, 32), "-8 >>> 32"); |
| assertEquals(2147483644, unsignedShiftRight(-8, 33), "-8 >>> 33"); |
| assertEquals(1073741822, unsignedShiftRight(-8, 34), "-8 >>> 34"); |
| |
| assertEquals(2147483648, unsignedShiftRight(0x80000000, 0), "0x80000000 >>> 0"); |
| assertEquals(1073741824, unsignedShiftRight(0x80000000, 1), "0x80000000 >>> 1"); |
| assertEquals( 536870912, unsignedShiftRight(0x80000000, 2), "0x80000000 >>> 2"); |
| |
| assertEquals(1073741824, unsignedShiftRight(0x40000000, 0), "0x40000000 >>> 0"); |
| assertEquals( 536870912, unsignedShiftRight(0x40000000, 1), "0x40000000 >>> 1"); |
| assertEquals( 268435456, unsignedShiftRight(0x40000000, 2), "0x40000000 >>> 2"); |