1 // Copyright 2011 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 28 // Flags: --max-new-space-size=256 --allow-natives-syntax 29 30 var test_id = 0; 31 32 function testFloor(expect, input) { 33 var test = new Function('n', 34 '"' + (test_id++) + '";return Math.floor(n)'); 35 assertEquals(expect, test(input)); 36 assertEquals(expect, test(input)); 37 assertEquals(expect, test(input)); 38 %OptimizeFunctionOnNextCall(test); 39 assertEquals(expect, test(input)); 40 } 41 42 function zero() { 43 var x = 0.5; 44 return (function() { return x - 0.5; })(); 45 } 46 47 function test() { 48 // Ensure that a negative zero coming from Math.floor is properly handled 49 // by other operations. 50 function ifloor(x) { 51 return 1 / Math.floor(x); 52 } 53 assertEquals(-Infinity, ifloor(-0)); 54 assertEquals(-Infinity, ifloor(-0)); 55 assertEquals(-Infinity, ifloor(-0)); 56 %OptimizeFunctionOnNextCall(ifloor); 57 assertEquals(-Infinity, ifloor(-0)); 58 59 testFloor(0, 0.1); 60 testFloor(0, 0.49999999999999994); 61 testFloor(0, 0.5); 62 testFloor(0, 0.7); 63 testFloor(-1, -0.1); 64 testFloor(-1, -0.49999999999999994); 65 testFloor(-1, -0.5); 66 testFloor(-1, -0.7); 67 testFloor(1, 1); 68 testFloor(1, 1.1); 69 testFloor(1, 1.5); 70 testFloor(1, 1.7); 71 testFloor(-1, -1); 72 testFloor(-2, -1.1); 73 testFloor(-2, -1.5); 74 testFloor(-2, -1.7); 75 76 testFloor(0, Number.MIN_VALUE); 77 testFloor(-1, -Number.MIN_VALUE); 78 testFloor(Number.MAX_VALUE, Number.MAX_VALUE); 79 testFloor(-Number.MAX_VALUE, -Number.MAX_VALUE); 80 testFloor(Infinity, Infinity); 81 testFloor(-Infinity, -Infinity); 82 } 83 84 85 // Test in a loop to cover the custom IC and GC-related issues. 86 for (var i = 0; i < 100; i++) { 87 test(); 88 } 89
