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/* -*- 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<Value> 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_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 */
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