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| author | Aurelien Jarno <aurelien@aurel32.net> | 2022-10-03 23:46:11 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2022-10-03 23:46:11 +0200 |
| commit | f31a5a884ed84bd37032729d4d1eb9d06c9f3c29 (patch) | |
| tree | efde63e1cf974d18a9c0ae0a54e446c162866fe0 /time | |
| parent | fc7de1d9b99ae1676bc626ddca422d7abee0eb48 (diff) | |
| download | glibc-f31a5a884ed84bd37032729d4d1eb9d06c9f3c29.zip glibc-f31a5a884ed84bd37032729d4d1eb9d06c9f3c29.tar.gz glibc-f31a5a884ed84bd37032729d4d1eb9d06c9f3c29.tar.bz2 | |
x86-64: Require BMI2 for AVX2 wcs(n)cmp implementations
The AVX2 wcs(n)cmp implementations use the 'bzhi' instruction, which
belongs to the BMI2 CPU feature.
NB: It also uses the 'tzcnt' BMI1 instruction, but it is executed as BSF
as BSF if the CPU doesn't support TZCNT, and produces the same result
for non-zero input.
Partially fixes: b77b06e0e296 ("x86: Optimize strcmp-avx2.S")
Partially resolves: BZ #29611
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
Diffstat (limited to 'time')
0 files changed, 0 insertions, 0 deletions