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 // 2^52 is a precision boundary. 49 var two_52 = (1 << 30) * (1 << 22); 50 51 testFloor(two_52, two_52); 52 testFloor(two_52, two_52 + 0.1); 53 assertEquals(two_52, two_52 + 0.5); 54 testFloor(two_52, two_52 + 0.5); 55 assertEquals(two_52 + 1, two_52 + 0.7); 56 testFloor(two_52 + 1, two_52 + 0.7); 57 58 testFloor(two_52 - 1, two_52 - 1); 59 testFloor(two_52 - 1, two_52 - 1 + 0.1); 60 testFloor(two_52 - 1, two_52 - 1 + 0.5); 61 testFloor(two_52 - 1, two_52 - 1 + 0.7); 62 63 testFloor(-two_52, -two_52); 64 testFloor(-two_52, -two_52 + 0.1); 65 testFloor(-two_52, -two_52 + 0.5); 66 testFloor(-two_52, -two_52 + 0.7); 67 68 testFloor(-two_52 + 1, -two_52 + 1); 69 testFloor(-two_52 + 1, -two_52 + 1 + 0.1); 70 testFloor(-two_52 + 1, -two_52 + 1 + 0.5); 71 testFloor(-two_52 + 1, -two_52 + 1 + 0.7); 72 } 73 74 75 // Test in a loop to cover the custom IC and GC-related issues. 76 for (var i = 0; i < 100; i++) { 77 test(); 78 } 79
