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| author | Joseph Myers <joseph@codesourcery.com> | 2013-12-05 14:01:41 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2013-12-05 14:01:41 +0000 |
| commit | e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474 (patch) | |
| tree | 1a1f08bd5751795b08e013f499f49df0830917fc /math/w_tgammal.c | |
| parent | bbf37bdc12c0370a0ac2fa597cddd660bad6ec5e (diff) | |
| download | glibc-e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474.tar.gz glibc-e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474.tar.xz glibc-e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474.zip | |
Fix tgamma errno setting on underflow (bug 6810).
Diffstat (limited to 'math/w_tgammal.c')
| -rw-r--r-- | math/w_tgammal.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/math/w_tgammal.c b/math/w_tgammal.c index 72b247db2a..4e2d66ae84 100644 --- a/math/w_tgammal.c +++ b/math/w_tgammal.c @@ -18,6 +18,7 @@ * Return the Gamma function of x. */ +#include <errno.h> #include <math.h> #include <math_private.h> @@ -27,13 +28,15 @@ __tgammal(long double x) int local_signgam; long double y = __ieee754_gammal_r(x,&local_signgam); - if(__builtin_expect(!__finitel(y), 0) + if(__glibc_unlikely (!__finitel (y) || y == 0) && (__finitel (x) || __isinfl (x) < 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 */ } |