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platform_bionic/libc/include/math.h
Elliott Hughes e76ee993ff isnan and isinf aren't functions. 
isnan was a function in POSIX in 1997, but changed to a macro only in 2004
to align with the C standard. isinf wasn't in POSIX until 2004, where it
appeared as a macro only (but other C libraries already had it as a
function).

Now the C++ standard has added ::isnan and ::isinf functions with different
signatures from the historical ones, so we need to move our historical cruft
out of the way.

We'll keep the implementations for backwards compatibility.

Bug: http://b/34724220
Test: ran tests
Change-Id: Id665f0344af6fe6ed245106e60231f4ef2027f41
2017-02-02 14:02:49 -08:00

371 lines
12 KiB
C
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/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* from: @(#)fdlibm.h 5.1 93/09/24
* $FreeBSD$
*/
#ifndef _MATH_H_
#define _MATH_H_
#include <sys/cdefs.h>
#include <limits.h>
__BEGIN_DECLS
#define HUGE_VAL __builtin_huge_val()
#define FP_ILOGB0 (-INT_MAX)
#define FP_ILOGBNAN INT_MAX
#define HUGE_VALF __builtin_huge_valf()
#define HUGE_VALL __builtin_huge_vall()
#define INFINITY __builtin_inff()
#define NAN __builtin_nanf("")
#define MATH_ERRNO 1
#define MATH_ERREXCEPT 2
#define math_errhandling MATH_ERREXCEPT
#if defined(__FP_FAST_FMA)
#define FP_FAST_FMA 1
#endif
#if defined(__FP_FAST_FMAF)
#define FP_FAST_FMAF 1
#endif
#if defined(__FP_FAST_FMAL)
#define FP_FAST_FMAL 1
#endif
/* Symbolic constants to classify floating point numbers. */
#define FP_INFINITE 0x01
#define FP_NAN 0x02
#define FP_NORMAL 0x04
#define FP_SUBNORMAL 0x08
#define FP_ZERO 0x10
#define fpclassify(x) \
__builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, x)
#define isfinite(x) __builtin_isfinite(x)
#define isinf(x) __builtin_isinf(x)
#define isnan(x) __builtin_isnan(x)
#define isnormal(x) __builtin_isnormal(x)
#define isgreater(x, y) __builtin_isgreater((x), (y))
#define isgreaterequal(x, y) __builtin_isgreaterequal((x), (y))
#define isless(x, y) __builtin_isless((x), (y))
#define islessequal(x, y) __builtin_islessequal((x), (y))
#define islessgreater(x, y) __builtin_islessgreater((x), (y))
#define isunordered(x, y) __builtin_isunordered((x), (y))
#define signbit(x) \
((sizeof(x) == sizeof(float)) ? __builtin_signbitf(x) \
: (sizeof(x) == sizeof(double)) ? __builtin_signbit(x) \
: __builtin_signbitl(x))
typedef double __double_t;
typedef __double_t double_t;
typedef float __float_t;
typedef __float_t float_t;
#if defined(__USE_BSD)
#define HUGE MAXFLOAT
#endif
extern int signgam;
/*
* Most of these functions depend on the rounding mode and have the side
* effect of raising floating-point exceptions, so they are not declared
* as __attribute_const__. In C99, FENV_ACCESS affects the purity of these functions.
*/
int __fpclassifyd(double) __attribute_const__;
int __fpclassifyf(float) __attribute_const__;
int __fpclassifyl(long double) __attribute_const__;
int __isfinitef(float) __attribute_const__;
int __isfinite(double) __attribute_const__;
int __isfinitel(long double) __attribute_const__;
int __isinff(float) __attribute_const__;
int __isinfl(long double) __attribute_const__;
int __isnanf(float) __attribute_const__ __INTRODUCED_IN(21);
int __isnanl(long double) __attribute_const__;
int __isnormalf(float) __attribute_const__;
int __isnormal(double) __attribute_const__;
int __isnormall(long double) __attribute_const__;
int __signbit(double) __attribute_const__;
int __signbitf(float) __attribute_const__;
int __signbitl(long double) __attribute_const__;
double acos(double);
double asin(double);
double atan(double);
double atan2(double, double);
double cos(double);
double sin(double);
double tan(double);
double cosh(double);
double sinh(double);
double tanh(double);
double exp(double);
double frexp(double, int *); /* fundamentally !__attribute_const__ */
double ldexp(double, int);
double log(double);
double log10(double);
double modf(double, double *); /* fundamentally !__attribute_const__ */
double pow(double, double);
double sqrt(double);
double ceil(double);
double fabs(double) __attribute_const__;
double floor(double);
double fmod(double, double);
double acosh(double);
double asinh(double);
double atanh(double);
double cbrt(double);
double erf(double);
double erfc(double);
double exp2(double);
double expm1(double);
double fma(double, double, double);
double hypot(double, double);
int ilogb(double) __attribute_const__;
double lgamma(double);
long long llrint(double);
long long llround(double);
double log1p(double);
double log2(double) __INTRODUCED_IN(18);
double logb(double);
long lrint(double);
long lround(double);
double nan(const char*) __attribute_const__ __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13)
__INTRODUCED_IN_X86(9);
double nextafter(double, double);
double remainder(double, double);
double remquo(double, double, int*);
double rint(double);
double copysign(double, double) __attribute_const__;
double fdim(double, double);
double fmax(double, double) __attribute_const__;
double fmin(double, double) __attribute_const__;
double nearbyint(double);
double round(double);
double scalbln(double, long) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
double scalbn(double, int);
double tgamma(double);
double trunc(double);
float acosf(float);
float asinf(float);
float atanf(float);
float atan2f(float, float);
float cosf(float);
float sinf(float);
float tanf(float);
float coshf(float);
float sinhf(float);
float tanhf(float);
float exp2f(float);
float expf(float);
float expm1f(float);
float frexpf(float, int *); /* fundamentally !__attribute_const__ */
int ilogbf(float) __attribute_const__;
float ldexpf(float, int);
float log10f(float);
float log1pf(float);
float log2f(float) __INTRODUCED_IN(18);
float logf(float);
float modff(float, float *); /* fundamentally !__attribute_const__ */
float powf(float, float);
float sqrtf(float);
float ceilf(float);
float fabsf(float) __attribute_const__;
float floorf(float);
float fmodf(float, float);
float roundf(float);
float erff(float);
float erfcf(float);
float hypotf(float, float);
float lgammaf(float);
float tgammaf(float) __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13) __INTRODUCED_IN_X86(9);
float acoshf(float);
float asinhf(float);
float atanhf(float);
float cbrtf(float);
float logbf(float);
float copysignf(float, float) __attribute_const__;
long long llrintf(float);
long long llroundf(float);
long lrintf(float);
long lroundf(float);
float nanf(const char*) __attribute_const__ __INTRODUCED_IN_ARM(13) __INTRODUCED_IN_MIPS(13)
__INTRODUCED_IN_X86(9);
float nearbyintf(float);
float nextafterf(float, float);
float remainderf(float, float);
float remquof(float, float, int *);
float rintf(float);
float scalblnf(float, long) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
float scalbnf(float, int);
float truncf(float);
float fdimf(float, float);
float fmaf(float, float, float);
float fmaxf(float, float) __attribute_const__;
float fminf(float, float) __attribute_const__;
long double acoshl(long double) __INTRODUCED_IN(21);
long double acosl(long double) __INTRODUCED_IN(21);
long double asinhl(long double) __INTRODUCED_IN(21);
long double asinl(long double) __INTRODUCED_IN(21);
long double atan2l(long double, long double) __INTRODUCED_IN(21);
long double atanhl(long double) __INTRODUCED_IN(21);
long double atanl(long double) __INTRODUCED_IN(21);
long double cbrtl(long double) __INTRODUCED_IN(21);
long double ceill(long double);
long double copysignl(long double, long double) __attribute_const__;
long double coshl(long double) __INTRODUCED_IN(21);
long double cosl(long double) __INTRODUCED_IN(21);
long double erfcl(long double) __INTRODUCED_IN(21);
long double erfl(long double) __INTRODUCED_IN(21);
long double exp2l(long double) __INTRODUCED_IN(21);
long double expl(long double) __INTRODUCED_IN(21);
long double expm1l(long double) __INTRODUCED_IN(21);
long double fabsl(long double) __attribute_const__;
long double fdiml(long double, long double);
long double floorl(long double);
long double fmal(long double, long double, long double) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
long double fmaxl(long double, long double) __attribute_const__;
long double fminl(long double, long double) __attribute_const__;
long double fmodl(long double, long double) __INTRODUCED_IN(21);
long double frexpl(long double value, int*)
__INTRODUCED_IN(21) __VERSIONER_NO_GUARD; /* fundamentally !__attribute_const__ */
long double hypotl(long double, long double) __INTRODUCED_IN(21);
int ilogbl(long double) __attribute_const__;
long double ldexpl(long double, int);
long double lgammal(long double) __INTRODUCED_IN(21);
long long llrintl(long double) __INTRODUCED_IN(21);
long long llroundl(long double);
long double log10l(long double) __INTRODUCED_IN(21);
long double log1pl(long double) __INTRODUCED_IN(21);
long double log2l(long double) __INTRODUCED_IN(18);
long double logbl(long double) __INTRODUCED_IN(18);
long double logl(long double) __INTRODUCED_IN(21);
long lrintl(long double) __INTRODUCED_IN(21);
long lroundl(long double);
long double modfl(long double, long double*) __INTRODUCED_IN(21); /* fundamentally !__attribute_const__ */
long double nanl(const char*) __attribute_const__ __INTRODUCED_IN(13);
long double nearbyintl(long double) __INTRODUCED_IN(21);
long double nextafterl(long double, long double) __INTRODUCED_IN(21) __VERSIONER_NO_GUARD;
double nexttoward(double, long double) __INTRODUCED_IN(18) __VERSIONER_NO_GUARD;
float nexttowardf(float, long double);
long double nexttowardl(long double, long double) __INTRODUCED_IN(18) __VERSIONER_NO_GUARD;
long double powl(long double, long double) __INTRODUCED_IN(21);
long double remainderl(long double, long double) __INTRODUCED_IN(21);
long double remquol(long double, long double, int*) __INTRODUCED_IN(21);
long double rintl(long double) __INTRODUCED_IN(21);
long double roundl(long double);
long double scalblnl(long double, long) __INTRODUCED_IN_X86(18) __VERSIONER_NO_GUARD;
long double scalbnl(long double, int);
long double sinhl(long double) __INTRODUCED_IN(21);
long double sinl(long double) __INTRODUCED_IN(21);
long double sqrtl(long double) __INTRODUCED_IN(21);
long double tanhl(long double) __INTRODUCED_IN(21);
long double tanl(long double) __INTRODUCED_IN(21);
long double tgammal(long double) __INTRODUCED_IN(21);
long double truncl(long double);
double j0(double);
double j1(double);
double jn(int, double);
double y0(double);
double y1(double);
double yn(int, double);
#define M_E 2.7182818284590452354 /* e */
#define M_LOG2E 1.4426950408889634074 /* log 2e */
#define M_LOG10E 0.43429448190325182765 /* log 10e */
#define M_LN2 0.69314718055994530942 /* log e2 */
#define M_LN10 2.30258509299404568402 /* log e10 */
#define M_PI 3.14159265358979323846 /* pi */
#define M_PI_2 1.57079632679489661923 /* pi/2 */
#define M_PI_4 0.78539816339744830962 /* pi/4 */
#define M_1_PI 0.31830988618379067154 /* 1/pi */
#define M_2_PI 0.63661977236758134308 /* 2/pi */
#define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */
#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
#define MAXFLOAT ((float)3.40282346638528860e+38)
#if defined(__USE_BSD) || defined(__USE_GNU)
double gamma(double);
double scalb(double, double);
double drem(double, double);
int finite(double) __attribute_const__;
int isnanf(float) __attribute_const__;
double gamma_r(double, int*);
double lgamma_r(double, int*);
double significand(double);
long double lgammal_r(long double, int*) __INTRODUCED_IN(23);
long double significandl(long double) __INTRODUCED_IN(21);
float dremf(float, float);
int finitef(float) __attribute_const__;
float gammaf(float);
float j0f(float);
float j1f(float);
float jnf(int, float);
float scalbf(float, float);
float y0f(float);
float y1f(float);
float ynf(int, float);
float gammaf_r(float, int *);
float lgammaf_r(float, int *);
float significandf(float);
#endif
#if defined(__USE_GNU)
#define M_El 2.718281828459045235360287471352662498L /* e */
#define M_LOG2El 1.442695040888963407359924681001892137L /* log 2e */
#define M_LOG10El 0.434294481903251827651128918916605082L /* log 10e */
#define M_LN2l 0.693147180559945309417232121458176568L /* log e2 */
#define M_LN10l 2.302585092994045684017991454684364208L /* log e10 */
#define M_PIl 3.141592653589793238462643383279502884L /* pi */
#define M_PI_2l 1.570796326794896619231321691639751442L /* pi/2 */
#define M_PI_4l 0.785398163397448309615660845819875721L /* pi/4 */
#define M_1_PIl 0.318309886183790671537767526745028724L /* 1/pi */
#define M_2_PIl 0.636619772367581343075535053490057448L /* 2/pi */
#define M_2_SQRTPIl 1.128379167095512573896158903121545172L /* 2/sqrt(pi) */
#define M_SQRT2l 1.414213562373095048801688724209698079L /* sqrt(2) */
#define M_SQRT1_2l 0.707106781186547524400844362104849039L /* 1/sqrt(2) */
void sincos(double, double*, double*);
void sincosf(float, float*, float*);
void sincosl(long double, long double*, long double*);
#endif
__END_DECLS
#endif /* !_MATH_H_ */
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