diff -r 000000000000 -r 6474c204b198 js/src/jsmath.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/js/src/jsmath.h Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,363 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=8 sts=4 et sw=4 tw=99: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jsmath_h +#define jsmath_h + +#include "mozilla/MemoryReporting.h" + +#include "NamespaceImports.h" + +#ifndef M_PI +# define M_PI 3.14159265358979323846 +#endif +#ifndef M_E +# define M_E 2.7182818284590452354 +#endif +#ifndef M_LOG2E +# define M_LOG2E 1.4426950408889634074 +#endif +#ifndef M_LOG10E +# define M_LOG10E 0.43429448190325182765 +#endif +#ifndef M_LN2 +# define M_LN2 0.69314718055994530942 +#endif +#ifndef M_LN10 +# define M_LN10 2.30258509299404568402 +#endif +#ifndef M_SQRT2 +# define M_SQRT2 1.41421356237309504880 +#endif +#ifndef M_SQRT1_2 +# define M_SQRT1_2 0.70710678118654752440 +#endif + +namespace js { + +typedef double (*UnaryFunType)(double); + +class MathCache +{ + static const unsigned SizeLog2 = 12; + static const unsigned Size = 1 << SizeLog2; + struct Entry { double in; UnaryFunType f; double out; }; + Entry table[Size]; + + public: + MathCache(); + + unsigned hash(double x) { + union { double d; struct { uint32_t one, two; } s; } u = { x }; + uint32_t hash32 = u.s.one ^ u.s.two; + uint16_t hash16 = uint16_t(hash32 ^ (hash32 >> 16)); + return (hash16 & (Size - 1)) ^ (hash16 >> (16 - SizeLog2)); + } + + /* + * N.B. lookup uses double-equality. This is only safe if hash() maps +0 + * and -0 to different table entries, which is asserted in MathCache(). + */ + double lookup(UnaryFunType f, double x) { + unsigned index = hash(x); + Entry &e = table[index]; + if (e.in == x && e.f == f) + return e.out; + e.in = x; + e.f = f; + return e.out = f(x); + } + + size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf); +}; + +} /* namespace js */ + +/* + * JS math functions. + */ + +extern JSObject * +js_InitMathClass(JSContext *cx, js::HandleObject obj); + +extern double +math_random_no_outparam(JSContext *cx); + +extern bool +js_math_random(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +js_math_abs(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +js_math_max(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +js_math_min(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +js_math_sqrt(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +js_math_pow(JSContext *cx, unsigned argc, js::Value *vp); + +namespace js { + +extern bool +math_imul(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +RoundFloat32(JSContext *cx, Handle v, float *out); + +extern bool +math_fround(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_log(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_log_impl(MathCache *cache, double x); + +extern double +math_log_uncached(double x); + +extern bool +math_sin(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_sin_impl(MathCache *cache, double x); + +extern double +math_sin_uncached(double x); + +extern bool +math_cos(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_cos_impl(MathCache *cache, double x); + +extern double +math_cos_uncached(double x); + +extern bool +math_exp(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_exp_impl(MathCache *cache, double x); + +extern double +math_exp_uncached(double x); + +extern bool +math_tan(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_tan_impl(MathCache *cache, double x); + +extern double +math_tan_uncached(double x); + +extern bool +math_log10(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_log2(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_log1p(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_expm1(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_cosh(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_sinh(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_tanh(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_acosh(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_asinh(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_atanh(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +ecmaHypot(double x, double y); + +extern bool +math_hypot(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_trunc(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_sign(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_cbrt(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_asin(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_acos(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_atan(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_atan2(JSContext *cx, unsigned argc, Value *vp); + +extern double +ecmaAtan2(double x, double y); + +extern double +math_atan_impl(MathCache *cache, double x); + +extern double +math_atan_uncached(double x); + +extern bool +math_atan(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_asin_impl(MathCache *cache, double x); + +extern double +math_asin_uncached(double x); + +extern bool +math_asin(JSContext *cx, unsigned argc, js::Value *vp); + +extern double +math_acos_impl(MathCache *cache, double x); + +extern double +math_acos_uncached(double x); + +extern bool +math_acos(JSContext *cx, unsigned argc, js::Value *vp); + +extern bool +math_ceil(JSContext *cx, unsigned argc, Value *vp); + +extern double +math_ceil_impl(double x); + +extern bool +math_clz32(JSContext *cx, unsigned argc, Value *vp); + +extern bool +math_floor(JSContext *cx, unsigned argc, Value *vp); + +extern double +math_floor_impl(double x); + +extern bool +math_round(JSContext *cx, unsigned argc, Value *vp); + +extern double +math_round_impl(double x); + +extern float +math_roundf_impl(float x); + +extern double +powi(double x, int y); + +extern double +ecmaPow(double x, double y); + +extern bool +math_imul(JSContext *cx, unsigned argc, Value *vp); + +extern double +math_log10_impl(MathCache *cache, double x); + +extern double +math_log10_uncached(double x); + +extern double +math_log2_impl(MathCache *cache, double x); + +extern double +math_log2_uncached(double x); + +extern double +math_log1p_impl(MathCache *cache, double x); + +extern double +math_log1p_uncached(double x); + +extern double +math_expm1_impl(MathCache *cache, double x); + +extern double +math_expm1_uncached(double x); + +extern double +math_cosh_impl(MathCache *cache, double x); + +extern double +math_cosh_uncached(double x); + +extern double +math_sinh_impl(MathCache *cache, double x); + +extern double +math_sinh_uncached(double x); + +extern double +math_tanh_impl(MathCache *cache, double x); + +extern double +math_tanh_uncached(double x); + +extern double +math_acosh_impl(MathCache *cache, double x); + +extern double +math_acosh_uncached(double x); + +extern double +math_asinh_impl(MathCache *cache, double x); + +extern double +math_asinh_uncached(double x); + +extern double +math_atanh_impl(MathCache *cache, double x); + +extern double +math_atanh_uncached(double x); + +extern double +math_trunc_impl(MathCache *cache, double x); + +extern double +math_trunc_uncached(double x); + +extern double +math_sign_impl(MathCache *cache, double x); + +extern double +math_sign_uncached(double x); + +extern double +math_cbrt_impl(MathCache *cache, double x); + +extern double +math_cbrt_uncached(double x); + +} /* namespace js */ + +#endif /* jsmath_h */