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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 var stdlib = {}; | 5 var stdlib = {}; |
6 var foreign = {}; | 6 var foreign = {}; |
7 var heap = new ArrayBuffer(64 * 1024); | 7 var heap = new ArrayBuffer(64 * 1024); |
8 | 8 |
9 function Int32Mod(divisor) { | 9 var mod = (function Module(stdlib, foreign, heap) { |
10 var name = "mod_"; | 10 "use asm"; |
11 if (divisor < 0) { | 11 function mod(dividend, divisor) { |
12 name += "minus_"; | 12 dividend = dividend|0; |
| 13 divisor = divisor|0; |
| 14 return (dividend % divisor) | 0; |
13 } | 15 } |
14 name += Math.abs(divisor); | 16 return { mod: mod }; |
15 var m = eval("function Module(stdlib, foreign, heap) {\n" | 17 })(stdlib, foreign, heap).mod; |
16 + " \"use asm\";\n" | |
17 + " function " + name + "(dividend) {\n" | |
18 + " return ((dividend | 0) % " + divisor + ") | 0;\n" | |
19 + " }\n" | |
20 + " return { f: " + name + "}\n" | |
21 + "}; Module"); | |
22 return m(stdlib, foreign, heap).f; | |
23 } | |
24 | 18 |
25 var divisors = [-2147483648, -32 * 1024, -1000, -16, -7, -2, -1, | 19 var divisors = [-2147483648, -32 * 1024, -1000, -16, -7, -2, -1, 0, |
26 1, 3, 4, 10, 64, 100, 1024, 2147483647]; | 20 1, 3, 4, 10, 64, 100, 1024, 2147483647]; |
27 for (var i in divisors) { | 21 for (var i in divisors) { |
28 var divisor = divisors[i]; | 22 var divisor = divisors[i]; |
29 var mod = Int32Mod(divisor); | |
30 for (var dividend = -2147483648; dividend < 2147483648; dividend += 3999773) { | 23 for (var dividend = -2147483648; dividend < 2147483648; dividend += 3999773) { |
31 assertEquals((dividend % divisor) | 0, mod(dividend)); | 24 assertEquals((dividend % divisor) | 0, mod(dividend, divisor)); |
32 } | 25 } |
33 } | 26 } |
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