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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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