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fdlibm.h
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fdlibm.h
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/* @(#)fdlibm.h 1.5 04/04/22 */
/*
* ====================================================
* Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved.
*
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#ifndef __FDLIBM_H
#define __FDLIBM_H
#include <stdint.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
#define __getBits(i,x) do { uint64_t __j; double __f=x; memcpy(&__j,&__f,sizeof __j); i=__j; } while(0)
#define __setBits(x,i) do { uint64_t __j=i; double __f; memcpy(&__f,&__j,sizeof __f); x=__f; } while(0)
#define __getHI(i,x) do { uint64_t __i; __getBits(__i,x); i=(uint32_t)( __i >> 32); } while(0)
#define __getLO(i,x) do { uint64_t __i; __getBits(__i,x); i=(uint32_t)( __i & 0xFFFFFFFFU); } while(0)
#define __setHI(x,i) do { uint64_t __i; __getBits(__i,x); __i=(__i & 0xFFFFFFFFULL) | (((uint64_t)i) << 32); __setBits(x,__i); } while(0)
#define __setLO(x,i) do { uint64_t __i; __getBits(__i,x); __i=(__i & 0xFFFFFFFF00000000ULL) | ((uint32_t)(i)); __setBits(x,__i); } while(0)
#define __setHILO(x,h,l) do { uint64_t __i=(((uint64_t)h) << 32) | ((uint32_t)(l)); __setBits(x,__i); } while(0)
/* flip the sign of x */
#define __flipSign(x) do { uint64_t __i; __getBits(__i,x); __i=( __i ^ 0x8000000000000000ULL); __setBits(x,__i); } while(0)
/* increment the exponent of x by k */
#define __incExp(x,k) do { uint64_t __i; __getBits(__i,x); __i=__i + (((uint64_t)k) << 52); __setBits(x,__i); } while(0)
/*
* ANSI/POSIX
*/
extern int signgam;
#define MAXFLOAT ((float)3.40282346638528860e+38)
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
struct exception {
int type;
char *name;
double arg1;
double arg2;
double retval;
};
#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
/*
* ANSI/POSIX
*/
extern double acos(double);
extern double asin(double);
extern double atan(double);
extern double atan2(double, double);
extern double cos(double);
extern double sin(double);
extern double tan(double);
extern double cosh(double);
extern double sinh(double);
extern double tanh(double);
extern double exp(double);
extern double frexp(double, int *);
extern double ldexp(double, int);
extern double log(double);
extern double log10(double);
extern double modf(double, double *);
extern double pow(double, double);
extern double sqrt(double);
extern double ceil(double);
extern double fabs(double);
extern double floor(double);
extern double fmod(double, double);
extern double erf(double);
extern double erfc(double);
extern double gamma(double);
extern double hypot(double, double);
extern int isnan(double);
extern int finite(double);
extern double j0(double);
extern double j1(double);
extern double jn(int, double);
extern double lgamma(double);
extern double y0(double);
extern double y1(double);
extern double yn(int, double);
extern double acosh(double);
extern double asinh(double);
extern double atanh(double);
extern double cbrt(double);
extern double logb(double);
extern double nextafter(double, double);
extern double remainder(double, double);
#ifdef _SCALB_INT
extern double scalb(double, int);
#else
extern double scalb(double, double);
#endif
extern int matherr(struct exception *);
/*
* IEEE Test Vector
*/
extern double significand(double);
/*
* Functions callable from C, intended to support IEEE arithmetic.
*/
extern double copysign(double, double);
extern int ilogb(double);
extern double rint(double);
extern double scalbn(double, int);
/*
* BSD math library entry points
*/
extern double expm1(double);
extern double log1p(double);
/*
* Reentrant version of gamma & lgamma; passes signgam back by reference
* as the second argument; user must allocate space for signgam.
*/
#ifdef _REENTRANT
extern double gamma_r(double, int *);
extern double lgamma_r(double, int *);
#endif /* _REENTRANT */
/* ieee style elementary functions */
extern double __ieee754_sqrt(double);
extern double __ieee754_acos(double);
extern double __ieee754_acosh(double);
extern double __ieee754_log(double);
extern double __ieee754_atanh(double);
extern double __ieee754_asin(double);
extern double __ieee754_atan2(double,double);
extern double __ieee754_exp(double);
extern double __ieee754_cosh(double);
extern double __ieee754_fmod(double,double);
extern double __ieee754_pow(double,double);
extern double __ieee754_lgamma_r(double,int *);
extern double __ieee754_gamma_r(double,int *);
extern double __ieee754_lgamma(double);
extern double __ieee754_gamma(double);
extern double __ieee754_log10(double);
extern double __ieee754_sinh(double);
extern double __ieee754_hypot(double,double);
extern double __ieee754_j0(double);
extern double __ieee754_j1(double);
extern double __ieee754_y0(double);
extern double __ieee754_y1(double);
extern double __ieee754_jn(int,double);
extern double __ieee754_yn(int,double);
extern double __ieee754_remainder(double,double);
extern int __ieee754_rem_pio2(double,double*);
#ifdef _SCALB_INT
extern double __ieee754_scalb(double,int);
#else
extern double __ieee754_scalb(double,double);
#endif
/* fdlibm kernel function */
extern double __kernel_standard(double,double,int);
extern double __kernel_sin(double,double,int);
extern double __kernel_cos(double,double);
extern double __kernel_tan(double,double,int);
extern int __kernel_rem_pio2(double*,double*,int,int,int,const int*);
#ifdef __cplusplus
}
#endif
#endif /* __FDLIBM_H */