https://github.com/mozilla/gecko-dev
Tip revision: 0f7f9fad114b25dcae74e0d7f14d5359c64e174e authored by ffxbld on 07 July 2015, 02:40:09 UTC
Added FENNEC_39_0_1_RELEASE FENNEC_39_0_1_BUILD2 tag(s) for changeset 96c214a15c79. DONTBUILD CLOSED TREE a=release
Added FENNEC_39_0_1_RELEASE FENNEC_39_0_1_BUILD2 tag(s) for changeset 96c214a15c79. DONTBUILD CLOSED TREE a=release
Tip revision: 0f7f9fa
jsmath.h
/* -*- 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
{
public:
enum MathFuncId {
Zero,
Sin, Cos, Tan, Sinh, Cosh, Tanh, Asin, Acos, Atan, Asinh, Acosh, Atanh,
Sqrt, Log, Log10, Log2, Log1p, Exp, Expm1, Cbrt, Trunc, Sign
};
private:
static const unsigned SizeLog2 = 12;
static const unsigned Size = 1 << SizeLog2;
struct Entry { double in; MathFuncId id; double out; };
Entry table[Size];
public:
MathCache();
unsigned hash(double x, MathFuncId id) {
union { double d; struct { uint32_t one, two; } s; } u = { x };
uint32_t hash32 = u.s.one ^ u.s.two;
hash32 += uint32_t(id) << 8;
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, MathFuncId id) {
unsigned index = hash(x, id);
Entry& e = table[index];
if (e.in == x && e.id == id)
return e.out;
e.in = x;
e.id = id;
return e.out = f(x);
}
size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf);
};
/*
* JS math functions.
*/
extern JSObject*
InitMathClass(JSContext* cx, HandleObject obj);
extern void
random_initState(uint64_t* rngState);
extern uint64_t
random_next(uint64_t* rngState, int bits);
static const double RNG_DSCALE = double(1LL << 53);
inline double
random_nextDouble(uint64_t* rng)
{
return double((random_next(rng, 26) << 27) + random_next(rng, 27)) / RNG_DSCALE;
}
extern double
math_random_no_outparam(JSContext* cx);
extern bool
math_random(JSContext* cx, unsigned argc, js::Value* vp);
extern bool
math_abs_handle(JSContext* cx, js::HandleValue v, js::MutableHandleValue r);
extern bool
math_abs(JSContext* cx, unsigned argc, js::Value* vp);
extern double
math_max_impl(double x, double y);
extern bool
math_max(JSContext* cx, unsigned argc, js::Value* vp);
extern double
math_min_impl(double x, double y);
extern bool
math_min(JSContext* cx, unsigned argc, js::Value* vp);
extern bool
math_sqrt(JSContext* cx, unsigned argc, js::Value* vp);
extern bool
math_pow_handle(JSContext* cx, js::HandleValue base, js::HandleValue power,
js::MutableHandleValue result);
extern bool
math_pow(JSContext* cx, unsigned argc, js::Value* vp);
extern bool
minmax_impl(JSContext* cx, bool max, js::HandleValue a, js::HandleValue b,
js::MutableHandleValue res);
extern bool
math_sqrt_handle(JSContext* cx, js::HandleValue number, js::MutableHandleValue result);
extern bool
math_imul(JSContext* cx, unsigned argc, js::Value* vp);
extern bool
RoundFloat32(JSContext* cx, HandleValue v, float* out);
extern bool
RoundFloat32(JSContext* cx, HandleValue arg, MutableHandleValue res);
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_log_handle(JSContext* cx, HandleValue val, MutableHandleValue res);
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_sin_handle(JSContext* cx, HandleValue val, MutableHandleValue res);
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 double
hypot3(double x, double y, double z);
extern double
hypot4(double x, double y, double z, double w);
extern bool
math_hypot(JSContext* cx, unsigned argc, Value* vp);
extern bool
math_hypot_handle(JSContext* cx, HandleValueArray args, MutableHandleValue res);
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_handle(JSContext* cx, HandleValue y, HandleValue x, MutableHandleValue res);
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_handle(JSContext* cx, HandleValue value, MutableHandleValue res);
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_handle(JSContext* cx, HandleValue v, MutableHandleValue r);
extern bool
math_floor(JSContext* cx, unsigned argc, Value* vp);
extern double
math_floor_impl(double x);
template<typename T>
extern T GetBiggestNumberLessThan(T x);
extern bool
math_round_handle(JSContext* cx, HandleValue arg, MutableHandleValue res);
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 */