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