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authorJoseph Myers <joseph@codesourcery.com>2013-12-03 20:50:51 +0000
committerJoseph Myers <joseph@codesourcery.com>2013-12-03 20:50:51 +0000
commit17dea1887fcc116941e07cb0f5f2078140ab0384 (patch)
tree1b7f0def9e7037e6e97efc4419df028a852e314c /math/w_exp2f.c
parentb20de2c3d9d751eb259c321426188eefc64fcbe9 (diff)
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Fix exp2 errno setting on underflow (bug 16283).
Diffstat (limited to 'math/w_exp2f.c')
-rw-r--r--math/w_exp2f.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/w_exp2f.c b/math/w_exp2f.c
index 7c277ef..8430fd5 100644
--- a/math/w_exp2f.c
+++ b/math/w_exp2f.c
@@ -9,7 +9,7 @@ float
__exp2f (float x)
{
float z = __ieee754_exp2f (x);
- if (__builtin_expect (!__finitef (z), 0)
+ if (__builtin_expect (!__finitef (z) || z == 0, 0)
&& __finitef (x) && _LIB_VERSION != _IEEE_)
/* exp2 overflow: 144, exp2 underflow: 145 */
return __kernel_standard_f (x, x, 144 + !!__signbitf (x));