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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-10-13 11:10:10 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-10-17 08:18:52 +0100 |
| commit | 7363a9a9a097c455a7ddb9386b4c6f7bdf91065f (patch) | |
| tree | 8e11dcf8264bf1760830c82a0c086e828d8cab8b /nptl/tst-rwlock2b.c | |
| parent | be066536bd313f1eec6e36fb92a96d39bf76f483 (diff) | |
| download | glibc-7363a9a9a097c455a7ddb9386b4c6f7bdf91065f.zip glibc-7363a9a9a097c455a7ddb9386b4c6f7bdf91065f.tar.gz glibc-7363a9a9a097c455a7ddb9386b4c6f7bdf91065f.tar.bz2 | |
math: Fix asin and acos invalid exception with old gcc
This works around a gcc issue where it const folded inf/inf into nan,
preventing the invalid exception to be signalled.
(x-x)/(x-x) is more robust against optimizations and works for all
out of bounds values including x==nan.
The gcc issue https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95115
should be fixed on release branches starting from gcc-10, but it is
better to change the code in case glibc is built with older gcc.
Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Diffstat (limited to 'nptl/tst-rwlock2b.c')
0 files changed, 0 insertions, 0 deletions