The Tor Browser / file comparison
comparison: js/src/jsmath.h
js/src/jsmath.h
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef jsmath_h | |
| 8 #define jsmath_h | |
| 9 | |
| 10 #include "mozilla/MemoryReporting.h" | |
| 11 | |
| 12 #include "NamespaceImports.h" | |
| 13 | |
| 14 #ifndef M_PI | |
| 15 # define M_PI 3.14159265358979323846 | |
| 16 #endif | |
| 17 #ifndef M_E | |
| 18 # define M_E 2.7182818284590452354 | |
| 19 #endif | |
| 20 #ifndef M_LOG2E | |
| 21 # define M_LOG2E 1.4426950408889634074 | |
| 22 #endif | |
| 23 #ifndef M_LOG10E | |
| 24 # define M_LOG10E 0.43429448190325182765 | |
| 25 #endif | |
| 26 #ifndef M_LN2 | |
| 27 # define M_LN2 0.69314718055994530942 | |
| 28 #endif | |
| 29 #ifndef M_LN10 | |
| 30 # define M_LN10 2.30258509299404568402 | |
| 31 #endif | |
| 32 #ifndef M_SQRT2 | |
| 33 # define M_SQRT2 1.41421356237309504880 | |
| 34 #endif | |
| 35 #ifndef M_SQRT1_2 | |
| 36 # define M_SQRT1_2 0.70710678118654752440 | |
| 37 #endif | |
| 38 | |
| 39 namespace js { | |
| 40 | |
| 41 typedef double (*UnaryFunType)(double); | |
| 42 | |
| 43 class MathCache | |
| 44 { | |
| 45 static const unsigned SizeLog2 = 12; | |
| 46 static const unsigned Size = 1 << SizeLog2; | |
| 47 struct Entry { double in; UnaryFunType f; double out; }; | |
| 48 Entry table[Size]; | |
| 49 | |
| 50 public: | |
| 51 MathCache(); | |
| 52 | |
| 53 unsigned hash(double x) { | |
| 54 union { double d; struct { uint32_t one, two; } s; } u = { x }; | |
| 55 uint32_t hash32 = u.s.one ^ u.s.two; | |
| 56 uint16_t hash16 = uint16_t(hash32 ^ (hash32 >> 16)); | |
| 57 return (hash16 & (Size - 1)) ^ (hash16 >> (16 - SizeLog2)); | |
| 58 } | |
| 59 | |
| 60 /* | |
| 61 * N.B. lookup uses double-equality. This is only safe if hash() maps +0 | |
| 62 * and -0 to different table entries, which is asserted in MathCache(). | |
| 63 */ | |
| 64 double lookup(UnaryFunType f, double x) { | |
| 65 unsigned index = hash(x); | |
| 66 Entry &e = table[index]; | |
| 67 if (e.in == x && e.f == f) | |
| 68 return e.out; | |
| 69 e.in = x; | |
| 70 e.f = f; | |
| 71 return e.out = f(x); | |
| 72 } | |
| 73 | |
| 74 size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf); | |
| 75 }; | |
| 76 | |
| 77 } /* namespace js */ | |
| 78 | |
| 79 /* | |
| 80 * JS math functions. | |
| 81 */ | |
| 82 | |
| 83 extern JSObject * | |
| 84 js_InitMathClass(JSContext *cx, js::HandleObject obj); | |
| 85 | |
| 86 extern double | |
| 87 math_random_no_outparam(JSContext *cx); | |
| 88 | |
| 89 extern bool | |
| 90 js_math_random(JSContext *cx, unsigned argc, js::Value *vp); | |
| 91 | |
| 92 extern bool | |
| 93 js_math_abs(JSContext *cx, unsigned argc, js::Value *vp); | |
| 94 | |
| 95 extern bool | |
| 96 js_math_max(JSContext *cx, unsigned argc, js::Value *vp); | |
| 97 | |
| 98 extern bool | |
| 99 js_math_min(JSContext *cx, unsigned argc, js::Value *vp); | |
| 100 | |
| 101 extern bool | |
| 102 js_math_sqrt(JSContext *cx, unsigned argc, js::Value *vp); | |
| 103 | |
| 104 extern bool | |
| 105 js_math_pow(JSContext *cx, unsigned argc, js::Value *vp); | |
| 106 | |
| 107 namespace js { | |
| 108 | |
| 109 extern bool | |
| 110 math_imul(JSContext *cx, unsigned argc, js::Value *vp); | |
| 111 | |
| 112 extern bool | |
| 113 RoundFloat32(JSContext *cx, Handle<Value> v, float *out); | |
| 114 | |
| 115 extern bool | |
| 116 math_fround(JSContext *cx, unsigned argc, js::Value *vp); | |
| 117 | |
| 118 extern bool | |
| 119 math_log(JSContext *cx, unsigned argc, js::Value *vp); | |
| 120 | |
| 121 extern double | |
| 122 math_log_impl(MathCache *cache, double x); | |
| 123 | |
| 124 extern double | |
| 125 math_log_uncached(double x); | |
| 126 | |
| 127 extern bool | |
| 128 math_sin(JSContext *cx, unsigned argc, js::Value *vp); | |
| 129 | |
| 130 extern double | |
| 131 math_sin_impl(MathCache *cache, double x); | |
| 132 | |
| 133 extern double | |
| 134 math_sin_uncached(double x); | |
| 135 | |
| 136 extern bool | |
| 137 math_cos(JSContext *cx, unsigned argc, js::Value *vp); | |
| 138 | |
| 139 extern double | |
| 140 math_cos_impl(MathCache *cache, double x); | |
| 141 | |
| 142 extern double | |
| 143 math_cos_uncached(double x); | |
| 144 | |
| 145 extern bool | |
| 146 math_exp(JSContext *cx, unsigned argc, js::Value *vp); | |
| 147 | |
| 148 extern double | |
| 149 math_exp_impl(MathCache *cache, double x); | |
| 150 | |
| 151 extern double | |
| 152 math_exp_uncached(double x); | |
| 153 | |
| 154 extern bool | |
| 155 math_tan(JSContext *cx, unsigned argc, js::Value *vp); | |
| 156 | |
| 157 extern double | |
| 158 math_tan_impl(MathCache *cache, double x); | |
| 159 | |
| 160 extern double | |
| 161 math_tan_uncached(double x); | |
| 162 | |
| 163 extern bool | |
| 164 math_log10(JSContext *cx, unsigned argc, js::Value *vp); | |
| 165 | |
| 166 extern bool | |
| 167 math_log2(JSContext *cx, unsigned argc, js::Value *vp); | |
| 168 | |
| 169 extern bool | |
| 170 math_log1p(JSContext *cx, unsigned argc, js::Value *vp); | |
| 171 | |
| 172 extern bool | |
| 173 math_expm1(JSContext *cx, unsigned argc, js::Value *vp); | |
| 174 | |
| 175 extern bool | |
| 176 math_cosh(JSContext *cx, unsigned argc, js::Value *vp); | |
| 177 | |
| 178 extern bool | |
| 179 math_sinh(JSContext *cx, unsigned argc, js::Value *vp); | |
| 180 | |
| 181 extern bool | |
| 182 math_tanh(JSContext *cx, unsigned argc, js::Value *vp); | |
| 183 | |
| 184 extern bool | |
| 185 math_acosh(JSContext *cx, unsigned argc, js::Value *vp); | |
| 186 | |
| 187 extern bool | |
| 188 math_asinh(JSContext *cx, unsigned argc, js::Value *vp); | |
| 189 | |
| 190 extern bool | |
| 191 math_atanh(JSContext *cx, unsigned argc, js::Value *vp); | |
| 192 | |
| 193 extern double | |
| 194 ecmaHypot(double x, double y); | |
| 195 | |
| 196 extern bool | |
| 197 math_hypot(JSContext *cx, unsigned argc, Value *vp); | |
| 198 | |
| 199 extern bool | |
| 200 math_trunc(JSContext *cx, unsigned argc, Value *vp); | |
| 201 | |
| 202 extern bool | |
| 203 math_sign(JSContext *cx, unsigned argc, Value *vp); | |
| 204 | |
| 205 extern bool | |
| 206 math_cbrt(JSContext *cx, unsigned argc, Value *vp); | |
| 207 | |
| 208 extern bool | |
| 209 math_asin(JSContext *cx, unsigned argc, Value *vp); | |
| 210 | |
| 211 extern bool | |
| 212 math_acos(JSContext *cx, unsigned argc, Value *vp); | |
| 213 | |
| 214 extern bool | |
| 215 math_atan(JSContext *cx, unsigned argc, Value *vp); | |
| 216 | |
| 217 extern bool | |
| 218 math_atan2(JSContext *cx, unsigned argc, Value *vp); | |
| 219 | |
| 220 extern double | |
| 221 ecmaAtan2(double x, double y); | |
| 222 | |
| 223 extern double | |
| 224 math_atan_impl(MathCache *cache, double x); | |
| 225 | |
| 226 extern double | |
| 227 math_atan_uncached(double x); | |
| 228 | |
| 229 extern bool | |
| 230 math_atan(JSContext *cx, unsigned argc, js::Value *vp); | |
| 231 | |
| 232 extern double | |
| 233 math_asin_impl(MathCache *cache, double x); | |
| 234 | |
| 235 extern double | |
| 236 math_asin_uncached(double x); | |
| 237 | |
| 238 extern bool | |
| 239 math_asin(JSContext *cx, unsigned argc, js::Value *vp); | |
| 240 | |
| 241 extern double | |
| 242 math_acos_impl(MathCache *cache, double x); | |
| 243 | |
| 244 extern double | |
| 245 math_acos_uncached(double x); | |
| 246 | |
| 247 extern bool | |
| 248 math_acos(JSContext *cx, unsigned argc, js::Value *vp); | |
| 249 | |
| 250 extern bool | |
| 251 math_ceil(JSContext *cx, unsigned argc, Value *vp); | |
| 252 | |
| 253 extern double | |
| 254 math_ceil_impl(double x); | |
| 255 | |
| 256 extern bool | |
| 257 math_clz32(JSContext *cx, unsigned argc, Value *vp); | |
| 258 | |
| 259 extern bool | |
| 260 math_floor(JSContext *cx, unsigned argc, Value *vp); | |
| 261 | |
| 262 extern double | |
| 263 math_floor_impl(double x); | |
| 264 | |
| 265 extern bool | |
| 266 math_round(JSContext *cx, unsigned argc, Value *vp); | |
| 267 | |
| 268 extern double | |
| 269 math_round_impl(double x); | |
| 270 | |
| 271 extern float | |
| 272 math_roundf_impl(float x); | |
| 273 | |
| 274 extern double | |
| 275 powi(double x, int y); | |
| 276 | |
| 277 extern double | |
| 278 ecmaPow(double x, double y); | |
| 279 | |
| 280 extern bool | |
| 281 math_imul(JSContext *cx, unsigned argc, Value *vp); | |
| 282 | |
| 283 extern double | |
| 284 math_log10_impl(MathCache *cache, double x); | |
| 285 | |
| 286 extern double | |
| 287 math_log10_uncached(double x); | |
| 288 | |
| 289 extern double | |
| 290 math_log2_impl(MathCache *cache, double x); | |
| 291 | |
| 292 extern double | |
| 293 math_log2_uncached(double x); | |
| 294 | |
| 295 extern double | |
| 296 math_log1p_impl(MathCache *cache, double x); | |
| 297 | |
| 298 extern double | |
| 299 math_log1p_uncached(double x); | |
| 300 | |
| 301 extern double | |
| 302 math_expm1_impl(MathCache *cache, double x); | |
| 303 | |
| 304 extern double | |
| 305 math_expm1_uncached(double x); | |
| 306 | |
| 307 extern double | |
| 308 math_cosh_impl(MathCache *cache, double x); | |
| 309 | |
| 310 extern double | |
| 311 math_cosh_uncached(double x); | |
| 312 | |
| 313 extern double | |
| 314 math_sinh_impl(MathCache *cache, double x); | |
| 315 | |
| 316 extern double | |
| 317 math_sinh_uncached(double x); | |
| 318 | |
| 319 extern double | |
| 320 math_tanh_impl(MathCache *cache, double x); | |
| 321 | |
| 322 extern double | |
| 323 math_tanh_uncached(double x); | |
| 324 | |
| 325 extern double | |
| 326 math_acosh_impl(MathCache *cache, double x); | |
| 327 | |
| 328 extern double | |
| 329 math_acosh_uncached(double x); | |
| 330 | |
| 331 extern double | |
| 332 math_asinh_impl(MathCache *cache, double x); | |
| 333 | |
| 334 extern double | |
| 335 math_asinh_uncached(double x); | |
| 336 | |
| 337 extern double | |
| 338 math_atanh_impl(MathCache *cache, double x); | |
| 339 | |
| 340 extern double | |
| 341 math_atanh_uncached(double x); | |
| 342 | |
| 343 extern double | |
| 344 math_trunc_impl(MathCache *cache, double x); | |
| 345 | |
| 346 extern double | |
| 347 math_trunc_uncached(double x); | |
| 348 | |
| 349 extern double | |
| 350 math_sign_impl(MathCache *cache, double x); | |
| 351 | |
| 352 extern double | |
| 353 math_sign_uncached(double x); | |
| 354 | |
| 355 extern double | |
| 356 math_cbrt_impl(MathCache *cache, double x); | |
| 357 | |
| 358 extern double | |
| 359 math_cbrt_uncached(double x); | |
| 360 | |
| 361 } /* namespace js */ | |
| 362 | |
| 363 #endif /* jsmath_h */ |
