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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 // 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 rngstate; // Initialized to a Uint32Array during genesis. | 5 var rngstate; // Initialized to a Uint32Array during genesis. |
6 | 6 |
7 (function(global, utils) { | 7 (function(global, utils) { |
8 "use strict"; | 8 "use strict"; |
9 | 9 |
10 %CheckIsBootstrapping(); | 10 %CheckIsBootstrapping(); |
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175 | 175 |
176 // ES6 draft 09-27-13, section 20.2.2.34. | 176 // ES6 draft 09-27-13, section 20.2.2.34. |
177 function MathTrunc(x) { | 177 function MathTrunc(x) { |
178 x = +x; | 178 x = +x; |
179 if (x > 0) return %_MathFloor(x); | 179 if (x > 0) return %_MathFloor(x); |
180 if (x < 0) return -%_MathFloor(-x); | 180 if (x < 0) return -%_MathFloor(-x); |
181 // -0, 0 or NaN. | 181 // -0, 0 or NaN. |
182 return x; | 182 return x; |
183 } | 183 } |
184 | 184 |
185 // ES6 draft 09-27-13, section 20.2.2.33. | |
186 function MathTanh(x) { | |
187 x = TO_NUMBER(x); | |
188 // Idempotent for +/-0. | |
189 if (x === 0) return x; | |
190 // Returns +/-1 for +/-Infinity. | |
191 if (!NUMBER_IS_FINITE(x)) return MathSign(x); | |
192 var exp1 = MathExp(x); | |
193 var exp2 = MathExp(-x); | |
194 return (exp1 - exp2) / (exp1 + exp2); | |
195 } | |
196 | |
197 // ES6 draft 09-27-13, section 20.2.2.5. | 185 // ES6 draft 09-27-13, section 20.2.2.5. |
198 function MathAsinh(x) { | 186 function MathAsinh(x) { |
199 x = TO_NUMBER(x); | 187 x = TO_NUMBER(x); |
200 // Idempotent for NaN, +/-0 and +/-Infinity. | 188 // Idempotent for NaN, +/-0 and +/-Infinity. |
201 if (x === 0 || !NUMBER_IS_FINITE(x)) return x; | 189 if (x === 0 || !NUMBER_IS_FINITE(x)) return x; |
202 if (x > 0) return MathLog(x + %_MathSqrt(x * x + 1)); | 190 if (x > 0) return MathLog(x + %_MathSqrt(x * x + 1)); |
203 // This is to prevent numerical errors caused by large negative x. | 191 // This is to prevent numerical errors caused by large negative x. |
204 return -MathLog(-x + %_MathSqrt(x * x + 1)); | 192 return -MathLog(-x + %_MathSqrt(x * x + 1)); |
205 } | 193 } |
206 | 194 |
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322 "log", MathLog, | 310 "log", MathLog, |
323 "round", MathRound, | 311 "round", MathRound, |
324 "sqrt", MathSqrtJS, | 312 "sqrt", MathSqrtJS, |
325 "atan2", MathAtan2JS, | 313 "atan2", MathAtan2JS, |
326 "pow", MathPowJS, | 314 "pow", MathPowJS, |
327 "max", MathMax, | 315 "max", MathMax, |
328 "min", MathMin, | 316 "min", MathMin, |
329 "imul", MathImul, | 317 "imul", MathImul, |
330 "sign", MathSign, | 318 "sign", MathSign, |
331 "trunc", MathTrunc, | 319 "trunc", MathTrunc, |
332 "tanh", MathTanh, | |
333 "asinh", MathAsinh, | 320 "asinh", MathAsinh, |
334 "acosh", MathAcosh, | 321 "acosh", MathAcosh, |
335 "atanh", MathAtanh, | 322 "atanh", MathAtanh, |
336 "hypot", MathHypot, | 323 "hypot", MathHypot, |
337 "fround", MathFroundJS, | 324 "fround", MathFroundJS, |
338 "clz32", MathClz32JS, | 325 "clz32", MathClz32JS, |
339 "cbrt", MathCbrt | 326 "cbrt", MathCbrt |
340 ]); | 327 ]); |
341 | 328 |
342 %SetForceInlineFlag(MathAbs); | 329 %SetForceInlineFlag(MathAbs); |
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358 utils.Export(function(to) { | 345 utils.Export(function(to) { |
359 to.MathAbs = MathAbs; | 346 to.MathAbs = MathAbs; |
360 to.MathExp = MathExp; | 347 to.MathExp = MathExp; |
361 to.MathFloor = MathFloorJS; | 348 to.MathFloor = MathFloorJS; |
362 to.IntRandom = MathRandomRaw; | 349 to.IntRandom = MathRandomRaw; |
363 to.MathMax = MathMax; | 350 to.MathMax = MathMax; |
364 to.MathMin = MathMin; | 351 to.MathMin = MathMin; |
365 }); | 352 }); |
366 | 353 |
367 }) | 354 }) |
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