| /* w_gammaf.c -- float version of w_gamma.c. |
| * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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. |
| * ==================================================== |
| */ |
| |
| #include <errno.h> |
| #include <math.h> |
| #include <math_private.h> |
| |
| float |
| __tgammaf(float x) |
| { |
| int local_signgam; |
| float y = __ieee754_gammaf_r(x,&local_signgam); |
| |
| if(__glibc_unlikely (!isfinite (y) || y == 0) |
| && (isfinite (x) || (isinf (x) && x < 0.0)) |
| && _LIB_VERSION != _IEEE_) { |
| if (x == (float)0.0) |
| /* tgammaf pole */ |
| return __kernel_standard_f(x, x, 150); |
| else if(__floorf(x)==x&&x<0.0f) |
| /* tgammaf domain */ |
| return __kernel_standard_f(x, x, 141); |
| else if (y == 0) |
| /* tgammaf underflow */ |
| __set_errno (ERANGE); |
| else |
| /* tgammaf overflow */ |
| return __kernel_standard_f(x, x, 140); |
| } |
| return local_signgam < 0 ? - y : y; |
| } |
| weak_alias (__tgammaf, tgammaf) |