diff options
| author |   Anton Blanchard <anton@samba.org> | 2014-09-19 09:40:20 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2014-09-30 14:59:13 +1000 |
| commit | 8989aa4adacd02174d1f72a00af8d669934a2b7a (patch) | |
| tree | 45c14574a1c98878425318ffb0854ded1ebbcc79 /scripts/basic | |
| parent | selftests/powerpc: Add test of load_unaligned_zero_pad() (diff) | |
powerpc: ppc64le optimised word at a time
Use cmpb which compares each byte in two 64 bit values and
for each matching byte places 0xff in the target and 0x00
otherwise.
A simple hash_name microbenchmark:
http://ozlabs.org/~anton/junkcode/hash_name_bench.c
shows this version to be 10-20% faster than running the x86
version on POWER8, depending on the length.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'scripts/basic')
0 files changed, 0 insertions, 0 deletions