1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jsmath.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,363 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jsmath_h
1.11 +#define jsmath_h
1.12 +
1.13 +#include "mozilla/MemoryReporting.h"
1.14 +
1.15 +#include "NamespaceImports.h"
1.16 +
1.17 +#ifndef M_PI
1.18 +# define M_PI 3.14159265358979323846
1.19 +#endif
1.20 +#ifndef M_E
1.21 +# define M_E 2.7182818284590452354
1.22 +#endif
1.23 +#ifndef M_LOG2E
1.24 +# define M_LOG2E 1.4426950408889634074
1.25 +#endif
1.26 +#ifndef M_LOG10E
1.27 +# define M_LOG10E 0.43429448190325182765
1.28 +#endif
1.29 +#ifndef M_LN2
1.30 +# define M_LN2 0.69314718055994530942
1.31 +#endif
1.32 +#ifndef M_LN10
1.33 +# define M_LN10 2.30258509299404568402
1.34 +#endif
1.35 +#ifndef M_SQRT2
1.36 +# define M_SQRT2 1.41421356237309504880
1.37 +#endif
1.38 +#ifndef M_SQRT1_2
1.39 +# define M_SQRT1_2 0.70710678118654752440
1.40 +#endif
1.41 +
1.42 +namespace js {
1.43 +
1.44 +typedef double (*UnaryFunType)(double);
1.45 +
1.46 +class MathCache
1.47 +{
1.48 + static const unsigned SizeLog2 = 12;
1.49 + static const unsigned Size = 1 << SizeLog2;
1.50 + struct Entry { double in; UnaryFunType f; double out; };
1.51 + Entry table[Size];
1.52 +
1.53 + public:
1.54 + MathCache();
1.55 +
1.56 + unsigned hash(double x) {
1.57 + union { double d; struct { uint32_t one, two; } s; } u = { x };
1.58 + uint32_t hash32 = u.s.one ^ u.s.two;
1.59 + uint16_t hash16 = uint16_t(hash32 ^ (hash32 >> 16));
1.60 + return (hash16 & (Size - 1)) ^ (hash16 >> (16 - SizeLog2));
1.61 + }
1.62 +
1.63 + /*
1.64 + * N.B. lookup uses double-equality. This is only safe if hash() maps +0
1.65 + * and -0 to different table entries, which is asserted in MathCache().
1.66 + */
1.67 + double lookup(UnaryFunType f, double x) {
1.68 + unsigned index = hash(x);
1.69 + Entry &e = table[index];
1.70 + if (e.in == x && e.f == f)
1.71 + return e.out;
1.72 + e.in = x;
1.73 + e.f = f;
1.74 + return e.out = f(x);
1.75 + }
1.76 +
1.77 + size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf);
1.78 +};
1.79 +
1.80 +} /* namespace js */
1.81 +
1.82 +/*
1.83 + * JS math functions.
1.84 + */
1.85 +
1.86 +extern JSObject *
1.87 +js_InitMathClass(JSContext *cx, js::HandleObject obj);
1.88 +
1.89 +extern double
1.90 +math_random_no_outparam(JSContext *cx);
1.91 +
1.92 +extern bool
1.93 +js_math_random(JSContext *cx, unsigned argc, js::Value *vp);
1.94 +
1.95 +extern bool
1.96 +js_math_abs(JSContext *cx, unsigned argc, js::Value *vp);
1.97 +
1.98 +extern bool
1.99 +js_math_max(JSContext *cx, unsigned argc, js::Value *vp);
1.100 +
1.101 +extern bool
1.102 +js_math_min(JSContext *cx, unsigned argc, js::Value *vp);
1.103 +
1.104 +extern bool
1.105 +js_math_sqrt(JSContext *cx, unsigned argc, js::Value *vp);
1.106 +
1.107 +extern bool
1.108 +js_math_pow(JSContext *cx, unsigned argc, js::Value *vp);
1.109 +
1.110 +namespace js {
1.111 +
1.112 +extern bool
1.113 +math_imul(JSContext *cx, unsigned argc, js::Value *vp);
1.114 +
1.115 +extern bool
1.116 +RoundFloat32(JSContext *cx, Handle<Value> v, float *out);
1.117 +
1.118 +extern bool
1.119 +math_fround(JSContext *cx, unsigned argc, js::Value *vp);
1.120 +
1.121 +extern bool
1.122 +math_log(JSContext *cx, unsigned argc, js::Value *vp);
1.123 +
1.124 +extern double
1.125 +math_log_impl(MathCache *cache, double x);
1.126 +
1.127 +extern double
1.128 +math_log_uncached(double x);
1.129 +
1.130 +extern bool
1.131 +math_sin(JSContext *cx, unsigned argc, js::Value *vp);
1.132 +
1.133 +extern double
1.134 +math_sin_impl(MathCache *cache, double x);
1.135 +
1.136 +extern double
1.137 +math_sin_uncached(double x);
1.138 +
1.139 +extern bool
1.140 +math_cos(JSContext *cx, unsigned argc, js::Value *vp);
1.141 +
1.142 +extern double
1.143 +math_cos_impl(MathCache *cache, double x);
1.144 +
1.145 +extern double
1.146 +math_cos_uncached(double x);
1.147 +
1.148 +extern bool
1.149 +math_exp(JSContext *cx, unsigned argc, js::Value *vp);
1.150 +
1.151 +extern double
1.152 +math_exp_impl(MathCache *cache, double x);
1.153 +
1.154 +extern double
1.155 +math_exp_uncached(double x);
1.156 +
1.157 +extern bool
1.158 +math_tan(JSContext *cx, unsigned argc, js::Value *vp);
1.159 +
1.160 +extern double
1.161 +math_tan_impl(MathCache *cache, double x);
1.162 +
1.163 +extern double
1.164 +math_tan_uncached(double x);
1.165 +
1.166 +extern bool
1.167 +math_log10(JSContext *cx, unsigned argc, js::Value *vp);
1.168 +
1.169 +extern bool
1.170 +math_log2(JSContext *cx, unsigned argc, js::Value *vp);
1.171 +
1.172 +extern bool
1.173 +math_log1p(JSContext *cx, unsigned argc, js::Value *vp);
1.174 +
1.175 +extern bool
1.176 +math_expm1(JSContext *cx, unsigned argc, js::Value *vp);
1.177 +
1.178 +extern bool
1.179 +math_cosh(JSContext *cx, unsigned argc, js::Value *vp);
1.180 +
1.181 +extern bool
1.182 +math_sinh(JSContext *cx, unsigned argc, js::Value *vp);
1.183 +
1.184 +extern bool
1.185 +math_tanh(JSContext *cx, unsigned argc, js::Value *vp);
1.186 +
1.187 +extern bool
1.188 +math_acosh(JSContext *cx, unsigned argc, js::Value *vp);
1.189 +
1.190 +extern bool
1.191 +math_asinh(JSContext *cx, unsigned argc, js::Value *vp);
1.192 +
1.193 +extern bool
1.194 +math_atanh(JSContext *cx, unsigned argc, js::Value *vp);
1.195 +
1.196 +extern double
1.197 +ecmaHypot(double x, double y);
1.198 +
1.199 +extern bool
1.200 +math_hypot(JSContext *cx, unsigned argc, Value *vp);
1.201 +
1.202 +extern bool
1.203 +math_trunc(JSContext *cx, unsigned argc, Value *vp);
1.204 +
1.205 +extern bool
1.206 +math_sign(JSContext *cx, unsigned argc, Value *vp);
1.207 +
1.208 +extern bool
1.209 +math_cbrt(JSContext *cx, unsigned argc, Value *vp);
1.210 +
1.211 +extern bool
1.212 +math_asin(JSContext *cx, unsigned argc, Value *vp);
1.213 +
1.214 +extern bool
1.215 +math_acos(JSContext *cx, unsigned argc, Value *vp);
1.216 +
1.217 +extern bool
1.218 +math_atan(JSContext *cx, unsigned argc, Value *vp);
1.219 +
1.220 +extern bool
1.221 +math_atan2(JSContext *cx, unsigned argc, Value *vp);
1.222 +
1.223 +extern double
1.224 +ecmaAtan2(double x, double y);
1.225 +
1.226 +extern double
1.227 +math_atan_impl(MathCache *cache, double x);
1.228 +
1.229 +extern double
1.230 +math_atan_uncached(double x);
1.231 +
1.232 +extern bool
1.233 +math_atan(JSContext *cx, unsigned argc, js::Value *vp);
1.234 +
1.235 +extern double
1.236 +math_asin_impl(MathCache *cache, double x);
1.237 +
1.238 +extern double
1.239 +math_asin_uncached(double x);
1.240 +
1.241 +extern bool
1.242 +math_asin(JSContext *cx, unsigned argc, js::Value *vp);
1.243 +
1.244 +extern double
1.245 +math_acos_impl(MathCache *cache, double x);
1.246 +
1.247 +extern double
1.248 +math_acos_uncached(double x);
1.249 +
1.250 +extern bool
1.251 +math_acos(JSContext *cx, unsigned argc, js::Value *vp);
1.252 +
1.253 +extern bool
1.254 +math_ceil(JSContext *cx, unsigned argc, Value *vp);
1.255 +
1.256 +extern double
1.257 +math_ceil_impl(double x);
1.258 +
1.259 +extern bool
1.260 +math_clz32(JSContext *cx, unsigned argc, Value *vp);
1.261 +
1.262 +extern bool
1.263 +math_floor(JSContext *cx, unsigned argc, Value *vp);
1.264 +
1.265 +extern double
1.266 +math_floor_impl(double x);
1.267 +
1.268 +extern bool
1.269 +math_round(JSContext *cx, unsigned argc, Value *vp);
1.270 +
1.271 +extern double
1.272 +math_round_impl(double x);
1.273 +
1.274 +extern float
1.275 +math_roundf_impl(float x);
1.276 +
1.277 +extern double
1.278 +powi(double x, int y);
1.279 +
1.280 +extern double
1.281 +ecmaPow(double x, double y);
1.282 +
1.283 +extern bool
1.284 +math_imul(JSContext *cx, unsigned argc, Value *vp);
1.285 +
1.286 +extern double
1.287 +math_log10_impl(MathCache *cache, double x);
1.288 +
1.289 +extern double
1.290 +math_log10_uncached(double x);
1.291 +
1.292 +extern double
1.293 +math_log2_impl(MathCache *cache, double x);
1.294 +
1.295 +extern double
1.296 +math_log2_uncached(double x);
1.297 +
1.298 +extern double
1.299 +math_log1p_impl(MathCache *cache, double x);
1.300 +
1.301 +extern double
1.302 +math_log1p_uncached(double x);
1.303 +
1.304 +extern double
1.305 +math_expm1_impl(MathCache *cache, double x);
1.306 +
1.307 +extern double
1.308 +math_expm1_uncached(double x);
1.309 +
1.310 +extern double
1.311 +math_cosh_impl(MathCache *cache, double x);
1.312 +
1.313 +extern double
1.314 +math_cosh_uncached(double x);
1.315 +
1.316 +extern double
1.317 +math_sinh_impl(MathCache *cache, double x);
1.318 +
1.319 +extern double
1.320 +math_sinh_uncached(double x);
1.321 +
1.322 +extern double
1.323 +math_tanh_impl(MathCache *cache, double x);
1.324 +
1.325 +extern double
1.326 +math_tanh_uncached(double x);
1.327 +
1.328 +extern double
1.329 +math_acosh_impl(MathCache *cache, double x);
1.330 +
1.331 +extern double
1.332 +math_acosh_uncached(double x);
1.333 +
1.334 +extern double
1.335 +math_asinh_impl(MathCache *cache, double x);
1.336 +
1.337 +extern double
1.338 +math_asinh_uncached(double x);
1.339 +
1.340 +extern double
1.341 +math_atanh_impl(MathCache *cache, double x);
1.342 +
1.343 +extern double
1.344 +math_atanh_uncached(double x);
1.345 +
1.346 +extern double
1.347 +math_trunc_impl(MathCache *cache, double x);
1.348 +
1.349 +extern double
1.350 +math_trunc_uncached(double x);
1.351 +
1.352 +extern double
1.353 +math_sign_impl(MathCache *cache, double x);
1.354 +
1.355 +extern double
1.356 +math_sign_uncached(double x);
1.357 +
1.358 +extern double
1.359 +math_cbrt_impl(MathCache *cache, double x);
1.360 +
1.361 +extern double
1.362 +math_cbrt_uncached(double x);
1.363 +
1.364 +} /* namespace js */
1.365 +
1.366 +#endif /* jsmath_h */
