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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 } | |
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