path: root/StdLib/Include/math.h

/*  $NetBSD: math.h,v 1.44 2006/03/25 16:41:11 xtraeme Exp $  */

/*
 * ====================================================
 * 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.
 * ====================================================
 */

/*
 * @(#)fdlibm.h 5.1 93/09/24
 */

#ifndef _MATH_H_
#define _MATH_H_

#include  <sys/EfiCdefs.h>
#include <sys/featuretest.h>

union __float_u {
  unsigned char __dummy[sizeof(float)];
  float __val;
};

union __double_u {
  unsigned char __dummy[sizeof(double)];
  double __val;
};

union __long_double_u {
  unsigned char __dummy[sizeof(long double)];
  long double __val;
};

#include <machine/math.h>   /* may use __float_u, __double_u,
             or __long_double_u */

#ifdef __HAVE_LONG_DOUBLE
#define __fpmacro_unary_floating(__name, __arg0)      \
  /* LINTED */              \
  ((sizeof (__arg0) == sizeof (float))        \
  ? __ ## __name ## f (__arg0)        \
  : (sizeof (__arg0) == sizeof (double))        \
  ? __ ## __name ## d (__arg0)        \
  : __ ## __name ## l (__arg0))
#else
#define __fpmacro_unary_floating(__name, __arg0)      \
  /* LINTED */              \
  ((sizeof (__arg0) == sizeof (float))        \
  ? __ ## __name ## f (__arg0)        \
  : __ ## __name ## d (__arg0))
#endif /* __HAVE_LONG_DOUBLE */

/*
 * ANSI/POSIX
 */
/* 7.12#3 HUGE_VAL, HUGELF, HUGE_VALL */
extern const union __double_u __infinity;
#define HUGE_VAL  __infinity.__val

/*
 * ISO C99
 */
/* 7.12#3 HUGE_VAL, HUGELF, HUGE_VALL */
extern const union __float_u __infinityf;
#define HUGE_VALF __infinityf.__val

extern const union __long_double_u __infinityl;
#define HUGE_VALL __infinityl.__val

/* 7.12#4 INFINITY */
#ifdef __INFINITY
#define INFINITY  __INFINITY  /* float constant which overflows */
#else
#define INFINITY  HUGE_VALF /* positive infinity */
#endif /* __INFINITY */

/* 7.12#5 NAN: a quiet NaN, if supported */
#ifdef __HAVE_NANF
extern const union __float_u __nanf;
#define NAN   __nanf.__val
#endif /* __HAVE_NANF */

/* 7.12#6 number classification macros */
#define FP_INFINITE 0x00
#define FP_NAN    0x01
#define FP_NORMAL 0x02
#define FP_SUBNORMAL  0x03
#define FP_ZERO   0x04
/* NetBSD extensions */
#define _FP_LOMD  0x80    /* range for machine-specific classes */
#define _FP_HIMD  0xff

/*
 * XOPEN/SVID
 */
#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)
extern int signgam;

enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix};

#define _LIB_VERSION_TYPE enum fdversion
#define _LIB_VERSION _fdlib_version

/* if global variable _LIB_VERSION is not desirable, one may
 * change the following to be a constant by:
 *  #define _LIB_VERSION_TYPE const enum version
 * In that case, after one initializes the value _LIB_VERSION (see
 * s_lib_version.c) during compile time, it cannot be modified
 * in the middle of a program
 */
extern  _LIB_VERSION_TYPE  _LIB_VERSION;

#define _IEEE_  fdlibm_ieee
#define _SVID_  fdlibm_svid
#define _XOPEN_ fdlibm_xopen
#define _POSIX_ fdlibm_posix

#ifndef __cplusplus
struct exception {
  int type;
  char *name;
  double arg1;
  double arg2;
  double retval;
};
#endif

#define HUGE    MAXFLOAT

/*
 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h>
 * (one may replace the following line by "#include <values.h>")
 */

#define X_TLOSS   1.41484755040568800000e+16

#define DOMAIN    1
#define SING      2
#define OVERFLOW  3
#define UNDERFLOW 4
#define TLOSS     5
#define PLOSS     6


__BEGIN_DECLS
/*
 * ANSI/POSIX
 */
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 *);
double  ldexp(double, int);
double  log(double);
double  log2(double);
double  log10(double);
double  modf(double, double *);

double  pow(double, double);
double  sqrt(double);

double  ceil(double);
double  fabs(double);
double  floor(double);
double  fmod(double, double);

//#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
//double  erf(double);
//double  erfc(double);
//double  gamma(double);
//double  hypot(double, double);
int finite(double);
//double  j0(double);
//double  j1(double);
//double  jn(int, double);
//double  lgamma(double);
//double  y0(double);
//double  y1(double);
//double  yn(int, double);

//#if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
//double  acosh(double);
//double  asinh(double);
//double  atanh(double);
//double  cbrt(double);
double  expm1(double);
//int ilogb(double);
//double  log1p(double);
//double  logb(double);
//double  nextafter(double, double);
//double  remainder(double, double);
//double  rint(double);
//double  scalb(double, double);
//#endif /* (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)*/
//#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */

/* 7.12.3.1 int fpclassify(real-floating x) */
#define fpclassify(__x) __fpmacro_unary_floating(fpclassify, __x)

#if 0
/*
 * ISO C99
 */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
    !defined(_XOPEN_SOURCE) || \
    ((__STDC_VERSION__ - 0) >= 199901L) || \
    ((_POSIX_C_SOURCE - 0) >= 200112L) || \
    ((_XOPEN_SOURCE  - 0) >= 600) || \
    defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)

/* 7.12.3.2 int isfinite(real-floating x) */
#define isfinite(__x) __fpmacro_unary_floating(isfinite, __x)

/* 7.12.3.5 int isnormal(real-floating x) */
#define isnormal(__x) (fpclassify(__x) == FP_NORMAL)

/* 7.12.3.6 int signbit(real-floating x) */
#define signbit(__x)  __fpmacro_unary_floating(signbit, __x)

/* 7.12.4 trigonometric */

float acosf(float);
float asinf(float);
float atanf(float);
float atan2f(float, float);
float cosf(float);
float sinf(float);
float tanf(float);

/* 7.12.5 hyperbolic */

float acoshf(float);
float asinhf(float);
float atanhf(float);
float coshf(float);
float sinhf(float);
float tanhf(float);

/* 7.12.6 exp / log */

float expf(float);
float expm1f(float);
float frexpf(float, int *);
int ilogbf(float);
float ldexpf(float, int);
float logf(float);
float log2f(float);
float log10f(float);
float log1pf(float);
float logbf(float);
float modff(float, float *);
float scalbnf(float, int);

/* 7.12.7 power / absolute */

float cbrtf(float);
float fabsf(float);
float hypotf(float, float);
float powf(float, float);
float sqrtf(float);

/* 7.12.8 error / gamma */

float erff(float);
float erfcf(float);
float lgammaf(float);

/* 7.12.9 nearest integer */

float ceilf(float);
float floorf(float);
float rintf(float);
double  round(double);
float roundf(float);
double  trunc(double);
float truncf(float);
long int  lrint(double);
long int  lrintf(float);
/* LONGLONG */
long long int llrint(double);
/* LONGLONG */
long long int llrintf(float);
long int  lround(double);
long int  lroundf(float);
/* LONGLONG */
long long int llround(double);
/* LONGLONG */
long long int llroundf(float);

/* 7.12.10 remainder */

float fmodf(float, float);
float remainderf(float, float);

/* 7.2.11 manipulation */

float copysignf(float, float);
double  nan(const char *);
float nanf(const char *);
long double nanl(const char *);
float nextafterf(float, float);


#endif /* !_ANSI_SOURCE && ... */

#if defined(_NETBSD_SOURCE)
#ifndef __cplusplus
int matherr(struct exception *);
#endif
#endif /* _NETBSD_SOURCE */

/*
 * IEEE Test Vector
 */
double  significand(double);
#endif  /* if 0 */

/* 7.12.3.3 int isinf(real-floating x) */
#ifdef __isinf
#define isinf(__x)  __isinf(__x)
#else
#define isinf(__x)  __fpmacro_unary_floating(isinf, __x)
#endif

/* 7.12.3.4 int isnan(real-floating x) */
#ifdef __isnan
#define isnan(__x)  __isnan(__x)
#else
#define isnan(__x)  __fpmacro_unary_floating(isnan, __x)
#endif

/*
 * Functions callable from C, intended to support IEEE arithmetic.
 */
double  copysign(double, double);
double  scalbn(double, int);

#if 0
/*
 * BSD math library entry points
 */
#ifndef __MATH_PRIVATE__
double  cabs(/* struct complex { double r; double i; } */);
#endif
double  drem(double, double);


#if defined(_NETBSD_SOURCE) || defined(_REENTRANT)
/*
 * Reentrant version of gamma & lgamma; passes signgam back by reference
 * as the second argument; user must allocate space for signgam.
 */
double  gamma_r(double, int *);
double  lgamma_r(double, int *);
#endif /* _NETBSD_SOURCE || _REENTRANT */


#if defined(_NETBSD_SOURCE)

/* float versions of ANSI/POSIX functions */

float gammaf(float);
int isinff(float);
int isnanf(float);
int finitef(float);
float j0f(float);
float j1f(float);
float jnf(int, float);
float y0f(float);
float y1f(float);
float ynf(int, float);

float scalbf(float, float);

/*
 * float version of IEEE Test Vector
 */
float significandf(float);

/*
 * float versions of BSD math library entry points
 */
#ifndef __MATH_PRIVATE__
float cabsf(/* struct complex { float r; float i; } */);
#endif
float dremf(float, float);
#endif /* _NETBSD_SOURCE */

#if defined(_NETBSD_SOURCE) || defined(_REENTRANT)
/*
 * Float versions of reentrant version of gamma & lgamma; passes
 * signgam back by reference as the second argument; user must
 * allocate space for signgam.
 */
float gammaf_r(float, int *);
float lgammaf_r(float, int *);
#endif /* !... || _REENTRANT */

#endif  /* if 0 */

///*
// * Library implementation
// */
int __fpclassifyf(float);
int __fpclassifyd(double);
//int __isfinitef(float);
//int __isfinited(double);
int __isinff(float);
int __isinfd(double);
int __isnanf(float);
int __isnand(double);
//int __signbitf(float);
//int __signbitd(double);

//#ifdef __HAVE_LONG_DOUBLE
int __fpclassifyl(long double);
//int __isfinitel(long double);
int __isinfl(long double);
int __isnanl(long double);
//int __signbitl(long double);
//#endif
__END_DECLS

#endif /* _MATH_H_ */