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| author | Sunil K Pandey <skpgkp2@gmail.com> | 2022-08-09 07:57:29 -0700 |
|---|---|---|
| committer | Sunil K Pandey <skpgkp2@gmail.com> | 2022-11-03 15:51:52 -0700 |
| commit | faaf733f49211439475e50f06716b303ee2644bf (patch) | |
| tree | 3dd19a3b1d40d31f72cb063a05ad86dc273555d8 /sysdeps/unix/sysv/linux/semctl.c | |
| parent | 1f34a2328890aa192141f96449d25b77f666bf47 (diff) | |
| download | glibc-faaf733f49211439475e50f06716b303ee2644bf.zip glibc-faaf733f49211439475e50f06716b303ee2644bf.tar.gz glibc-faaf733f49211439475e50f06716b303ee2644bf.tar.bz2 | |
x86_64: Implement evex512 version of strrchr and wcsrchr
Changes from v1:
Use vec api for register.
Replace VPCMP with VPCMPEQ
Restructure and remove 1 unconditional jump.
Change page cross logic to use sall.
This patch implements following evex512 version of string functions.
evex512 version takes up to 30% less cycle as compared to evex,
depending on length and alignment.
- strrchr function using 512 bit vectors.
- wcsrchr function using 512 bit vectors.
Code size data:
strrchr-evex.o 879 byte
strrchr-evex512.o 601 byte (-32%)
wcsrchr-evex.o 882 byte
wcsrchr-evex512.o 572 byte (-35%)
Placeholder function, not used by any processor at the moment.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/semctl.c')
0 files changed, 0 insertions, 0 deletions