diff options
Diffstat (limited to 'math/w_tgammal_compat.c')
| -rw-r--r-- | math/w_tgammal_compat.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/math/w_tgammal_compat.c b/math/w_tgammal_compat.c new file mode 100644 index 0000000000..50de8cf906 --- /dev/null +++ b/math/w_tgammal_compat.c @@ -0,0 +1,45 @@ +/* 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) |