JezK
Edit File: bitops-info.js
// Copyright 2010 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 non_int32() { return 2600822924; // It's not a signed Int32. } function hidden_smi() { return 46512102; // It's a Smi } function hidden_int32() { return 1600822924; // It's a signed Int32. } function f() { var x = non_int32(); // Not a constant. var y = hidden_smi(); // Not a constant. var z = hidden_int32(); assertEquals(46512102 & 2600822924, 46512102 & x, "1"); assertEquals(1600822924 & 2600822924, 1600822924 & x, "2"); assertEquals(2600822924 & 2600822924, 2600822924 & x, "3"); assertEquals(46512102 & 46512102, 46512102 & y, "4"); assertEquals(1600822924 & 46512102, 1600822924 & y, "5"); assertEquals(2600822924 & 46512102, 2600822924 & y, "6"); assertEquals(46512102 & 1600822924, 46512102 & z, "7"); assertEquals(1600822924 & 1600822924, 1600822924 & z, "8"); assertEquals(2600822924 & 1600822924, 2600822924 & z, "9"); assertEquals(46512102 & 2600822924, y & x, "10"); assertEquals(1600822924 & 2600822924, z & x, "11"); assertEquals(46512102 & 2600822924, x & 46512102, "1rev"); assertEquals(1600822924 & 2600822924, x & 1600822924, "2rev"); assertEquals(2600822924 & 2600822924, x & 2600822924, "3rev"); assertEquals(46512102 & 46512102, y & 46512102, "4rev"); assertEquals(1600822924 & 46512102, y & 1600822924, "5rev"); assertEquals(2600822924 & 46512102, y & 2600822924, "6rev"); assertEquals(46512102 & 1600822924, z & 46512102, "7rev"); assertEquals(1600822924 & 1600822924, z & 1600822924, "8rev"); assertEquals(2600822924 & 1600822924, z & 2600822924, "9rev"); assertEquals(46512102 & 2600822924, x & y, "10rev"); assertEquals(1600822924 & 2600822924, x & z, "11rev"); assertEquals((46512102 & -0x20123456) | 1, (y & -0x20123456) | 1, "12"); assertEquals((1600822924 & -0x20123456) | 1, (z & -0x20123456) | 1, "13"); assertEquals((2600822924 & -0x20123456) | 1, (x & -0x20123456) | 1, "14"); assertEquals((46512102 & -0x20123456) | 1, (-0x20123456 & y) | 1, "12rev"); assertEquals((1600822924 & -0x20123456) | 1, (-0x20123456 & z) | 1, "13rev"); assertEquals((2600822924 & -0x20123456) | 1, (-0x20123456 & x) | 1, "14rev"); assertEquals(2600822924 & 2600822924, x & x, "xx"); assertEquals(y, y & y, "yy"); assertEquals(z, z & z, "zz"); } for (var i = 0; i < 5; i++) { f(); }