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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_tgammaf.c | |
| parent | bbf37bdc12c0370a0ac2fa597cddd660bad6ec5e (diff) | |
| download | glibc-e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474.tar.gz | |
Fix tgamma errno setting on underflow (bug 6810).
Diffstat (limited to 'math/w_tgammaf.c')
| -rw-r--r-- | math/w_tgammaf.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/math/w_tgammaf.c b/math/w_tgammaf.c index 8bb553e47b..fb15b6aa5c 100644 --- a/math/w_tgammaf.c +++ b/math/w_tgammaf.c @@ -13,6 +13,7 @@ * ==================================================== */ +#include <errno.h> #include <math.h> #include <math_private.h> @@ -22,7 +23,7 @@ __tgammaf(float x) int local_signgam; float y = __ieee754_gammaf_r(x,&local_signgam); - if(__builtin_expect(!__finitef(y), 0) + if(__glibc_unlikely (!__finitef (y) || y == 0) && (__finitef (x) || __isinff (x) < 0) && _LIB_VERSION != _IEEE_) { if (x == (float)0.0) @@ -31,6 +32,9 @@ __tgammaf(float x) 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); |