diff options
Diffstat (limited to 'math/w_tgammaf_compat.c')
| -rw-r--r-- | math/w_tgammaf_compat.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/math/w_tgammaf_compat.c b/math/w_tgammaf_compat.c new file mode 100644 index 0000000000..dfce894cc8 --- /dev/null +++ b/math/w_tgammaf_compat.c @@ -0,0 +1,44 @@ +/* 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) |