| /* 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. |
| * ==================================================== |
| */ |
| |
| /* long double gammal(double x) |
| * Return the Gamma function of x. |
| */ |
| |
| #include <errno.h> |
| #include <math.h> |
| #include <math_private.h> |
| |
| long double |
| __tgammal(long double x) |
| { |
| int local_signgam; |
| long double y = __ieee754_gammal_r(x,&local_signgam); |
| |
| if(__glibc_unlikely (!isfinite (y) || y == 0) |
| && (isfinite (x) || (isinf (x) && x < 0.0)) |
| && _LIB_VERSION != _IEEE_) { |
| if(x==0.0) |
| return __kernel_standard_l(x,x,250); /* tgamma pole */ |
| else if(__floorl(x)==x&&x<0.0L) |
| return __kernel_standard_l(x,x,241); /* tgamma domain */ |
| else if (y == 0) |
| __set_errno (ERANGE); /* tgamma underflow */ |
| else |
| return __kernel_standard_l(x,x,240); /* tgamma overflow */ |
| } |
| return local_signgam < 0 ? - y : y; |
| } |
| weak_alias (__tgammal, tgammal) |