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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_exp2.c
parentb20de2c3d9d751eb259c321426188eefc64fcbe9 (diff)
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Fix exp2 errno setting on underflow (bug 16283).
Diffstat (limited to 'math/w_exp2.c')
-rw-r--r--math/w_exp2.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/w_exp2.c b/math/w_exp2.c
index b5d8e25702..02820be373 100644
--- a/math/w_exp2.c
+++ b/math/w_exp2.c
@@ -9,7 +9,7 @@ double
 __exp2 (double x)
 {
   double z = __ieee754_exp2 (x);
-  if (__builtin_expect (!__finite (z), 0)
+  if (__builtin_expect (!__finite (z) || z == 0, 0)
       && __finite (x) && _LIB_VERSION != _IEEE_)
     /* exp2 overflow: 44, exp2 underflow: 45 */
     return __kernel_standard (x, x, 44 + !!__signbit (x));