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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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| 45 // ECMA 262 - 15.8.2.1 | 45 // ECMA 262 - 15.8.2.1 |
| 46 function MathAbs(x) { | 46 function MathAbs(x) { |
| 47 if (%_IsSmi(x)) return x >= 0 ? x : -x; | 47 if (%_IsSmi(x)) return x >= 0 ? x : -x; |
| 48 x = TO_NUMBER_INLINE(x); | 48 x = TO_NUMBER_INLINE(x); |
| 49 if (x === 0) return 0; // To handle -0. | 49 if (x === 0) return 0; // To handle -0. |
| 50 return x > 0 ? x : -x; | 50 return x > 0 ? x : -x; |
| 51 } | 51 } |
| 52 | 52 |
| 53 // ECMA 262 - 15.8.2.2 | 53 // ECMA 262 - 15.8.2.2 |
| 54 function MathAcos(x) { | 54 function MathAcos(x) { |
| 55 return %Math_acos(TO_NUMBER_INLINE(x)); | 55 return %MathAcos(TO_NUMBER_INLINE(x)); |
| 56 } | 56 } |
| 57 | 57 |
| 58 // ECMA 262 - 15.8.2.3 | 58 // ECMA 262 - 15.8.2.3 |
| 59 function MathAsin(x) { | 59 function MathAsin(x) { |
| 60 return %Math_asin(TO_NUMBER_INLINE(x)); | 60 return %MathAsin(TO_NUMBER_INLINE(x)); |
| 61 } | 61 } |
| 62 | 62 |
| 63 // ECMA 262 - 15.8.2.4 | 63 // ECMA 262 - 15.8.2.4 |
| 64 function MathAtan(x) { | 64 function MathAtan(x) { |
| 65 return %Math_atan(TO_NUMBER_INLINE(x)); | 65 return %MathAtan(TO_NUMBER_INLINE(x)); |
| 66 } | 66 } |
| 67 | 67 |
| 68 // ECMA 262 - 15.8.2.5 | 68 // ECMA 262 - 15.8.2.5 |
| 69 // The naming of y and x matches the spec, as does the order in which | 69 // The naming of y and x matches the spec, as does the order in which |
| 70 // ToNumber (valueOf) is called. | 70 // ToNumber (valueOf) is called. |
| 71 function MathAtan2(y, x) { | 71 function MathAtan2(y, x) { |
| 72 return %Math_atan2(TO_NUMBER_INLINE(y), TO_NUMBER_INLINE(x)); | 72 return %MathAtan2(TO_NUMBER_INLINE(y), TO_NUMBER_INLINE(x)); |
| 73 } | 73 } |
| 74 | 74 |
| 75 // ECMA 262 - 15.8.2.6 | 75 // ECMA 262 - 15.8.2.6 |
| 76 function MathCeil(x) { | 76 function MathCeil(x) { |
| 77 return -MathFloor(-x); | 77 return -MathFloor(-x); |
| 78 } | 78 } |
| 79 | 79 |
| 80 // ECMA 262 - 15.8.2.7 | 80 // ECMA 262 - 15.8.2.7 |
| 81 function MathCos(x) { | 81 function MathCos(x) { |
| 82 x = MathAbs(x); // Convert to number and get rid of -0. | 82 x = MathAbs(x); // Convert to number and get rid of -0. |
| 83 return TrigonometricInterpolation(x, 1); | 83 return TrigonometricInterpolation(x, 1); |
| 84 } | 84 } |
| 85 | 85 |
| 86 // ECMA 262 - 15.8.2.8 | 86 // ECMA 262 - 15.8.2.8 |
| 87 function MathExp(x) { | 87 function MathExp(x) { |
| 88 return %Math_exp(TO_NUMBER_INLINE(x)); | 88 return %MathExp(TO_NUMBER_INLINE(x)); |
| 89 } | 89 } |
| 90 | 90 |
| 91 // ECMA 262 - 15.8.2.9 | 91 // ECMA 262 - 15.8.2.9 |
| 92 function MathFloor(x) { | 92 function MathFloor(x) { |
| 93 x = TO_NUMBER_INLINE(x); | 93 x = TO_NUMBER_INLINE(x); |
| 94 // It's more common to call this with a positive number that's out | 94 // It's more common to call this with a positive number that's out |
| 95 // of range than negative numbers; check the upper bound first. | 95 // of range than negative numbers; check the upper bound first. |
| 96 if (x < 0x80000000 && x > 0) { | 96 if (x < 0x80000000 && x > 0) { |
| 97 // Numbers in the range [0, 2^31) can be floored by converting | 97 // Numbers in the range [0, 2^31) can be floored by converting |
| 98 // them to an unsigned 32-bit value using the shift operator. | 98 // them to an unsigned 32-bit value using the shift operator. |
| 99 // We avoid doing so for -0, because the result of Math.floor(-0) | 99 // We avoid doing so for -0, because the result of Math.floor(-0) |
| 100 // has to be -0, which wouldn't be the case with the shift. | 100 // has to be -0, which wouldn't be the case with the shift. |
| 101 return TO_UINT32(x); | 101 return TO_UINT32(x); |
| 102 } else { | 102 } else { |
| 103 return %Math_floor(x); | 103 return %MathFloor(x); |
| 104 } | 104 } |
| 105 } | 105 } |
| 106 | 106 |
| 107 // ECMA 262 - 15.8.2.10 | 107 // ECMA 262 - 15.8.2.10 |
| 108 function MathLog(x) { | 108 function MathLog(x) { |
| 109 return %_MathLog(TO_NUMBER_INLINE(x)); | 109 return %_MathLog(TO_NUMBER_INLINE(x)); |
| 110 } | 110 } |
| 111 | 111 |
| 112 // ECMA 262 - 15.8.2.11 | 112 // ECMA 262 - 15.8.2.11 |
| 113 function MathMax(arg1, arg2) { // length == 2 | 113 function MathMax(arg1, arg2) { // length == 2 |
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| 326 | 326 |
| 327 %SetInlineBuiltinFlag(MathCeil); | 327 %SetInlineBuiltinFlag(MathCeil); |
| 328 %SetInlineBuiltinFlag(MathRandom); | 328 %SetInlineBuiltinFlag(MathRandom); |
| 329 %SetInlineBuiltinFlag(MathSin); | 329 %SetInlineBuiltinFlag(MathSin); |
| 330 %SetInlineBuiltinFlag(MathCos); | 330 %SetInlineBuiltinFlag(MathCos); |
| 331 %SetInlineBuiltinFlag(MathTan); | 331 %SetInlineBuiltinFlag(MathTan); |
| 332 %SetInlineBuiltinFlag(TrigonometricInterpolation); | 332 %SetInlineBuiltinFlag(TrigonometricInterpolation); |
| 333 } | 333 } |
| 334 | 334 |
| 335 SetUpMath(); | 335 SetUpMath(); |
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