mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 22:11:18 +00:00
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
|
/* w_lgammal.c -- long double version of w_lgamma.c.
|
||
|
|
* Conversion to long double by Ulrich Drepper,
|
||
|
|
* Cygnus Support, drepper@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.
|
||
|
|
* ====================================================
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
||
|
|
static char rcsid[] = "$NetBSD: $";
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* long double lgammal(long double x)
|
||
|
|
* Return the logarithm of the Gamma function of x.
|
||
|
|
*
|
||
|
|
* Method: call __ieee754_lgammal_r
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "math.h"
|
||
|
|
#include "math_private.h"
|
||
|
|
|
||
|
|
extern int signgam;
|
||
|
|
|
||
|
|
#ifdef __STDC__
|
||
|
|
long double __lgammal(long double x)
|
||
|
|
#else
|
||
|
|
long double __lgammal(x)
|
||
|
|
long double x;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifdef _IEEE_LIBM
|
||
|
|
return __ieee754_lgammal_r(x,&signgam);
|
||
|
|
#else
|
||
|
|
long double y;
|
||
|
|
y = __ieee754_lgammal_r(x,&signgam);
|
||
|
|
if(_LIB_VERSION == _IEEE_) return y;
|
||
|
|
if(!__finitel(y)&&__finitel(x)) {
|
||
|
|
if(__floorl(x)==x&&x<=0.0)
|
||
|
|
return __kernel_standard(x,x,215); /* lgamma pole */
|
||
|
|
else
|
||
|
|
return __kernel_standard(x,x,214); /* lgamma overflow */
|
||
|
|
} else
|
||
|
|
return y;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
weak_alias (__lgammal, lgammal)
|