diff options
Diffstat (limited to 'math/w_tgammal.c')
| -rw-r--r-- | math/w_tgammal.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/math/w_tgammal.c b/math/w_tgammal.c new file mode 100644 index 0000000..75970a3 --- /dev/null +++ b/math/w_tgammal.c @@ -0,0 +1,55 @@ +/* w_gammal.c -- long double version of w_gamma.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 gammal(double x) + * Return the Gamma function of x. + */ + +#include <math.h> +#include "math_private.h" + +#ifdef __STDC__ + long double __tgammal(long double x) +#else + long double __tgammal(x) + long double x; +#endif +{ + long double y; + int local_signgam; + y = __ieee754_gammal_r(x,&local_signgam); + if (local_signgam < 0) y = -y; +#ifdef _IEEE_LIBM + return y; +#else + if(_LIB_VERSION == _IEEE_) return y; + + if(!__finitel(y)&&__finitel(x)) { + if(x==0.0) + return __kernel_standard(x,x,250); /* tgamma pole */ + else if(__floorl(x)==x&&x<0.0) + return __kernel_standard(x,x,241); /* tgamma domain */ + else + return __kernel_standard(x,x,240); /* tgamma overflow */ + } + return y; +#endif +} +weak_alias (__tgammal, tgammal) |