diff options
Diffstat (limited to 'sysdeps/libm-ieee754/w_lgammal.c')
| -rw-r--r-- | sysdeps/libm-ieee754/w_lgammal.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/w_lgammal.c b/sysdeps/libm-ieee754/w_lgammal.c new file mode 100644 index 0000000000..3d2cdbbc30 --- /dev/null +++ b/sysdeps/libm-ieee754/w_lgammal.c @@ -0,0 +1,54 @@ +/* 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) |