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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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44 } | 44 } |
45 | 45 |
46 function test() { | 46 function test() { |
47 testFloor(0, 0); | 47 testFloor(0, 0); |
48 testFloor(0, zero()); | 48 testFloor(0, zero()); |
49 testFloor(-0, -0); | 49 testFloor(-0, -0); |
50 testFloor(Infinity, Infinity); | 50 testFloor(Infinity, Infinity); |
51 testFloor(-Infinity, -Infinity); | 51 testFloor(-Infinity, -Infinity); |
52 testFloor(NaN, NaN); | 52 testFloor(NaN, NaN); |
53 | 53 |
| 54 // Ensure that a negative zero coming from Math.floor is properly handled |
| 55 // by other operations. |
| 56 function ifloor(x) { |
| 57 return 1 / Math.floor(x); |
| 58 } |
| 59 assertEquals(-Infinity, ifloor(-0)); |
| 60 assertEquals(-Infinity, ifloor(-0)); |
| 61 assertEquals(-Infinity, ifloor(-0)); |
| 62 %OptimizeFunctionOnNextCall(ifloor); |
| 63 assertEquals(-Infinity, ifloor(-0)); |
| 64 |
54 testFloor(0, 0.1); | 65 testFloor(0, 0.1); |
55 testFloor(0, 0.49999999999999994); | 66 testFloor(0, 0.49999999999999994); |
56 testFloor(0, 0.5); | 67 testFloor(0, 0.5); |
57 testFloor(0, 0.7); | 68 testFloor(0, 0.7); |
58 testFloor(-1, -0.1); | 69 testFloor(-1, -0.1); |
59 testFloor(-1, -0.49999999999999994); | 70 testFloor(-1, -0.49999999999999994); |
60 testFloor(-1, -0.5); | 71 testFloor(-1, -0.5); |
61 testFloor(-1, -0.7); | 72 testFloor(-1, -0.7); |
62 testFloor(1, 1); | 73 testFloor(1, 1); |
63 testFloor(1, 1.1); | 74 testFloor(1, 1.1); |
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122 testFloor(-two_52 + 1, -two_52 + 1 + 0.1); | 133 testFloor(-two_52 + 1, -two_52 + 1 + 0.1); |
123 testFloor(-two_52 + 1, -two_52 + 1 + 0.5); | 134 testFloor(-two_52 + 1, -two_52 + 1 + 0.5); |
124 testFloor(-two_52 + 1, -two_52 + 1 + 0.7); | 135 testFloor(-two_52 + 1, -two_52 + 1 + 0.7); |
125 } | 136 } |
126 | 137 |
127 | 138 |
128 // Test in a loop to cover the custom IC and GC-related issues. | 139 // Test in a loop to cover the custom IC and GC-related issues. |
129 for (var i = 0; i < 500; i++) { | 140 for (var i = 0; i < 500; i++) { |
130 test(); | 141 test(); |
131 } | 142 } |
| 143 |
| 144 |
| 145 // Regression test for a bug where a negative zero coming from Math.floor |
| 146 // was not properly handled by other operations. |
| 147 function floorsum(i, n) { |
| 148 var ret = Math.floor(n); |
| 149 while (--i > 0) { |
| 150 ret += Math.floor(n); |
| 151 } |
| 152 return ret; |
| 153 } |
| 154 assertEquals(-0, floorsum(1, -0)); |
| 155 %OptimizeFunctionOnNextCall(floorsum); |
| 156 // The optimized function will deopt. Run it with enough iterations to try |
| 157 // to optimize via OSR (triggering the bug). |
| 158 assertEquals(-0, floorsum(100000, -0)); |
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