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NetBSD/include/math.h
simonb 2d8577fb83 Clean up some rampant code duplication wrt ieee number handling: 
- Add alignment-safe double and float unions.
 - Use the above for the __infinity and __nan constants on all
   architectures that use the standard ieee754 representation of
   those constants.
 - Add a single copy of various ieee754 math functions (frexp, isinf,
   isnan, ldexp and modf) that had numerous duplicates among the
   arch-specific directories.
 - Use the above functions on all architectures where the generic C
   versions where used.  Architectures that had local assembly
   routines are untouched (for those functions only).
2002-02-19 13:08:12 +00:00

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/* $NetBSD: math.h,v 1.24 2002/02/19 13:08:12 simonb 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/cdefs.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;
};
#include <machine/math.h> /* may use __float_u or __double_u */
/*
* ANSI/POSIX
*/
extern __const union __double_u __infinity;
#define HUGE_VAL __infinity.__val
/*
* ISO C99
*/
#if defined(__HAVE_NANF) && \
(!defined(_ANSI_SOURCE) && \
(!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) || \
defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L))
extern __const union __float_u __nanf;
#define NAN __nanf.__val
#endif /* __HAVE_NANF && (!_ANSI_SOURCE && ....) */
/*
* XOPEN/SVID
*/
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) || \
defined(_XOPEN_SOURCE)
#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;
#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE || _XOPEN_SOURCE */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
!defined(_XOPEN_SOURCE)
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
#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */
__BEGIN_DECLS
/*
* ANSI/POSIX
*/
double acos __P((double));
double asin __P((double));
double atan __P((double));
double atan2 __P((double, double));
double cos __P((double));
double sin __P((double));
double tan __P((double));
double cosh __P((double));
double sinh __P((double));
double tanh __P((double));
double exp __P((double));
double frexp __P((double, int *));
double ldexp __P((double, int));
double log __P((double));
double log10 __P((double));
double modf __P((double, double *));
double pow __P((double, double));
double sqrt __P((double));
double ceil __P((double));
double fabs __P((double));
double floor __P((double));
double fmod __P((double, double));
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) || \
defined(_XOPEN_SOURCE)
double erf __P((double));
double erfc __P((double));
double gamma __P((double));
double hypot __P((double, double));
int isnan __P((double));
int finite __P((double));
double j0 __P((double));
double j1 __P((double));
double jn __P((int, double));
double lgamma __P((double));
double y0 __P((double));
double y1 __P((double));
double yn __P((int, double));
#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 500
double acosh __P((double));
double asinh __P((double));
double atanh __P((double));
double cbrt __P((double));
double expm1 __P((double));
int ilogb __P((double));
double log1p __P((double));
double logb __P((double));
double nextafter __P((double, double));
double remainder __P((double, double));
double rint __P((double));
double scalb __P((double, double));
#endif /* !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 500 */
#endif /* !_ANSI_SOURCE) && !_POSIX_C_SOURCE || _XOPEN_SOURCE */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
!defined(_XOPEN_SOURCE)
#ifndef __cplusplus
int matherr __P((struct exception *));
#endif
/*
* IEEE Test Vector
*/
double significand __P((double));
/*
* Functions callable from C, intended to support IEEE arithmetic.
*/
double copysign __P((double, double));
double scalbn __P((double, int));
/*
* BSD math library entry points
*/
#ifndef __MATH_PRIVATE__
double cabs __P((/* struct complex { double r; double i; } */));
#endif
double drem __P((double, double));
#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
!defined(_XOPEN_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 __P((double, int *));
double lgamma_r __P((double, int *));
#endif /* !... || _REENTRANT */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
!defined(_XOPEN_SOURCE)
int isinf __P((double));
/* float versions of ANSI/POSIX functions */
float acosf __P((float));
float asinf __P((float));
float atanf __P((float));
float atan2f __P((float, float));
float cosf __P((float));
float sinf __P((float));
float tanf __P((float));
float coshf __P((float));
float sinhf __P((float));
float tanhf __P((float));
float expf __P((float));
float frexpf __P((float, int *));
float ldexpf __P((float, int));
float logf __P((float));
float log10f __P((float));
float modff __P((float, float *));
float powf __P((float, float));
float sqrtf __P((float));
float ceilf __P((float));
float fabsf __P((float));
float floorf __P((float));
float fmodf __P((float, float));
float erff __P((float));
float erfcf __P((float));
float gammaf __P((float));
float hypotf __P((float, float));
int isinff __P((float));
int isnanf __P((float));
int finitef __P((float));
float j0f __P((float));
float j1f __P((float));
float jnf __P((int, float));
float lgammaf __P((float));
float y0f __P((float));
float y1f __P((float));
float ynf __P((int, float));
float acoshf __P((float));
float asinhf __P((float));
float atanhf __P((float));
float cbrtf __P((float));
float logbf __P((float));
float nextafterf __P((float, float));
float remainderf __P((float, float));
float scalbf __P((float, float));
/*
* float version of IEEE Test Vector
*/
float significandf __P((float));
/*
* Float versions of functions callable from C, intended to support
* IEEE arithmetic.
*/
float copysignf __P((float, float));
int ilogbf __P((float));
float rintf __P((float));
float scalbnf __P((float, int));
/*
* float versions of BSD math library entry points
*/
#ifndef __MATH_PRIVATE__
float cabsf __P((/* struct complex { float r; float i; } */));
#endif
float dremf __P((float, float));
float expm1f __P((float));
float log1pf __P((float));
#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
!defined(_XOPEN_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 __P((float, int *));
float lgammaf_r __P((float, int *));
#endif /* !... || _REENTRANT */
__END_DECLS
#endif /* _MATH_H_ */
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