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-rw-r--r--math/w_tgammaf.c6
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);