Red Hat Bugzilla – Bug 977887
Fix libm performance regression due to set/restore rounding mode
Last modified: 2016-11-24 07:13:22 EST
+++ This bug was initially created as a clone of Bug #976624 +++
Description of problem:
Some libm functions implement only rounding to nearest, so to ensure correctness they set and restore the default rounding mode. This is unnecessary in the default case and is hence a performance impediment. Upstream has solved this by calling the set/restore code only when the current rounding mode is not the default. Backport that fix.
glibc-2.16-33.fc18 has been submitted as an update for Fedora 18.
glibc-2.17-11.fc19 has been submitted as an update for Fedora 19.
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing glibc-2.17-11.fc19'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
glibc-2.17-11.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
glibc-2.16-33.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.