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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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91 function MathExp(x) { | 91 function MathExp(x) { |
92 if (!IS_NUMBER(x)) x = ToNumber(x); | 92 if (!IS_NUMBER(x)) x = ToNumber(x); |
93 return %Math_exp(x); | 93 return %Math_exp(x); |
94 } | 94 } |
95 | 95 |
96 // ECMA 262 - 15.8.2.9 | 96 // ECMA 262 - 15.8.2.9 |
97 function MathFloor(x) { | 97 function MathFloor(x) { |
98 if (!IS_NUMBER(x)) x = ToNumber(x); | 98 if (!IS_NUMBER(x)) x = ToNumber(x); |
99 // It's more common to call this with a positive number that's out | 99 // It's more common to call this with a positive number that's out |
100 // of range than negative numbers; check the upper bound first. | 100 // of range than negative numbers; check the upper bound first. |
101 if (x <= 0x7FFFFFFF && x > 0) { | 101 if (x < 0x80000000 && x > 0) { |
102 // Numbers in the range [0, 2^31) can be floored by converting | 102 // Numbers in the range [0, 2^31) can be floored by converting |
103 // them to an unsigned 32-bit value using the shift operator. | 103 // them to an unsigned 32-bit value using the shift operator. |
104 // We avoid doing so for -0, because the result of Math.floor(-0) | 104 // We avoid doing so for -0, because the result of Math.floor(-0) |
105 // has to be -0, which wouldn't be the case with the shift. | 105 // has to be -0, which wouldn't be the case with the shift. |
106 return x << 0; | 106 return x << 0; |
107 } else { | 107 } else { |
108 return %Math_floor(x); | 108 return %Math_floor(x); |
109 } | 109 } |
110 } | 110 } |
111 | 111 |
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254 "tan", MathTan, | 254 "tan", MathTan, |
255 "atan2", MathAtan2, | 255 "atan2", MathAtan2, |
256 "pow", MathPow, | 256 "pow", MathPow, |
257 "max", MathMax, | 257 "max", MathMax, |
258 "min", MathMin | 258 "min", MathMin |
259 )); | 259 )); |
260 }; | 260 }; |
261 | 261 |
262 | 262 |
263 SetupMath(); | 263 SetupMath(); |
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