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| author | Joseph Myers <joseph@codesourcery.com> | 2013-12-03 20:50:51 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2013-12-03 20:50:51 +0000 |
| commit | 17dea1887fcc116941e07cb0f5f2078140ab0384 (patch) | |
| tree | 1b7f0def9e7037e6e97efc4419df028a852e314c /math/w_exp2.c | |
| parent | b20de2c3d9d751eb259c321426188eefc64fcbe9 (diff) | |
| download | glibc-17dea1887fcc116941e07cb0f5f2078140ab0384.tar.gz glibc-17dea1887fcc116941e07cb0f5f2078140ab0384.tar.xz glibc-17dea1887fcc116941e07cb0f5f2078140ab0384.zip | |
Fix exp2 errno setting on underflow (bug 16283).
Diffstat (limited to 'math/w_exp2.c')
| -rw-r--r-- | math/w_exp2.c | 2 |
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)); |