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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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162 } | 162 } |
163 return r; | 163 return r; |
164 } | 164 } |
165 | 165 |
166 // ECMA 262 - 15.8.2.13 | 166 // ECMA 262 - 15.8.2.13 |
167 function MathPow(x, y) { | 167 function MathPow(x, y) { |
168 return %_MathPow(TO_NUMBER_INLINE(x), TO_NUMBER_INLINE(y)); | 168 return %_MathPow(TO_NUMBER_INLINE(x), TO_NUMBER_INLINE(y)); |
169 } | 169 } |
170 | 170 |
171 // ECMA 262 - 15.8.2.14 | 171 // ECMA 262 - 15.8.2.14 |
| 172 var rngstate; // Initialized to a Uint32Array during genesis. |
172 function MathRandom() { | 173 function MathRandom() { |
173 return %_RandomHeapNumber(); | 174 var r0 = (MathImul(18273, rngstate[0] & 0xFFFF) + (rngstate[0] >>> 16)) | 0; |
| 175 rngstate[0] = r0; |
| 176 var r1 = (MathImul(36969, rngstate[1] & 0xFFFF) + (rngstate[1] >>> 16)) | 0; |
| 177 rngstate[1] = r1; |
| 178 var x = ((r0 << 16) + (r1 & 0xFFFF)) | 0; |
| 179 // Division by 0x100000000 through multiplication by reciprocal. |
| 180 return (x < 0 ? (x + 0x100000000) : x) * 2.3283064365386962890625e-10; |
174 } | 181 } |
175 | 182 |
176 // ECMA 262 - 15.8.2.15 | 183 // ECMA 262 - 15.8.2.15 |
177 function MathRound(x) { | 184 function MathRound(x) { |
178 return %RoundNumber(TO_NUMBER_INLINE(x)); | 185 return %RoundNumber(TO_NUMBER_INLINE(x)); |
179 } | 186 } |
180 | 187 |
181 // ECMA 262 - 15.8.2.16 | 188 // ECMA 262 - 15.8.2.16 |
182 function MathSin(x) { | 189 function MathSin(x) { |
183 x = x * 1; // Convert to number and deal with -0. | 190 x = x * 1; // Convert to number and deal with -0. |
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341 "imul", MathImul | 348 "imul", MathImul |
342 )); | 349 )); |
343 | 350 |
344 %SetInlineBuiltinFlag(MathSin); | 351 %SetInlineBuiltinFlag(MathSin); |
345 %SetInlineBuiltinFlag(MathCos); | 352 %SetInlineBuiltinFlag(MathCos); |
346 %SetInlineBuiltinFlag(MathTan); | 353 %SetInlineBuiltinFlag(MathTan); |
347 %SetInlineBuiltinFlag(TrigonometricInterpolation); | 354 %SetInlineBuiltinFlag(TrigonometricInterpolation); |
348 } | 355 } |
349 | 356 |
350 SetUpMath(); | 357 SetUpMath(); |
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