diff options
| author | Sergey Cherkashin <4erkashin@list.ru> | 2017-10-03 15:26:34 +0300 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2017-11-03 20:23:10 +0100 |
| commit | ea38f4d89c9698895b1cf53a5946429dc1d8bbaa (patch) | |
| tree | e05828ca1fedf55f104b837bc9c44215c2978e99 /libm/w_lgamma_r.c | |
| parent | 68de9946e914d8c30dcc6667a059ea59e5b74cac (diff) | |
math: add exception handling functionality
According to standards SVID and SYSV.
Modified lgamma calling in case when 'signgam' variable should not be used.
Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
Diffstat (limited to 'libm/w_lgamma_r.c')
| -rw-r--r-- | libm/w_lgamma_r.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libm/w_lgamma_r.c b/libm/w_lgamma_r.c new file mode 100644 index 000000000..67ece5a89 --- /dev/null +++ b/libm/w_lgamma_r.c @@ -0,0 +1,38 @@ +/* @(#)wr_lgamma.c 5.1 93/09/24 */ +/* + * ==================================================== + * 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. + * ==================================================== + */ + +/* + * wrapper double lgamma_r(double x, int *signgamp) + */ + +#include <math.h> +#include "math_private.h" + +libm_hidden_proto(lgamma_r) +double +lgamma_r(double x, int *signgamp) +{ +#if __UCLIBC_HAS_FENV__ + double y = __ieee754_lgamma_r(x,signgamp); + if(__builtin_expect(!isfinite(y), 0) + && isfinite(x) && _LIB_VERSION != _IEEE_) + return __kernel_standard(x, x, + floor(x)==x&&x<=0.0 + ? 15 /* lgamma pole */ + : 14); /* lgamma overflow */ + + return y; +#else + return __ieee754_lgamma_r(x,signgamp); +#endif /* __UCLIBC_HAS_FENV__ */ +} +libm_hidden_def(lgamma_r) |