48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/* wrf_lgamma.c -- float version of wr_lgamma.c.
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
|
|
/*
|
|
* wrapper float lgammaf_r(float x, int *signgamp)
|
|
*/
|
|
|
|
#include "fdlibm.h"
|
|
#include <errno.h>
|
|
|
|
#ifdef __STDC__
|
|
float lgammaf_r(float x, int *signgamp) /* wrapper lgammaf_r */
|
|
#else
|
|
float lgammaf_r(x,signgamp) /* wrapper lgammaf_r */
|
|
float x; int *signgamp;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_lgammaf_r(x,signgamp);
|
|
#else
|
|
float y;
|
|
y = __ieee754_lgammaf_r(x,signgamp);
|
|
if(_LIB_VERSION == _IEEE_) return y;
|
|
if(!finitef(y)&&finitef(x)) {
|
|
if(floorf(x)==x&&x<=0.0f) {
|
|
/* lgammaf(-integer) or lgamma(0) */
|
|
errno = EDOM;
|
|
} else {
|
|
/* lgammaf(finite) overflow */
|
|
errno = ERANGE;
|
|
}
|
|
}
|
|
return y;
|
|
#endif
|
|
}
|