| commit | 6dd7a82cc54ebd2936763befd3dcd4beb727a704 | [log] [tgz] |
|---|---|---|
| author | Anton Blanchard <anton@samba.org> | Fri Jul 01 08:19:45 2016 +1000 |
| committer | Herbert Xu <herbert@gondor.apana.org.au> | Tue Jul 05 23:05:19 2016 +0800 |
| tree | 4077ad30a801a6e7dcc0b915612e2c815239fd9b | |
| parent | 151f25112ff7befc134ed3fc58b0ff8792b3169e [diff] |
crypto: powerpc - Add POWER8 optimised crc32c
Use the vector polynomial multiply-sum instructions in POWER8 to
speed up crc32c.
This is just over 41x faster than the slice-by-8 method that it
replaces. Measurements on a 4.1 GHz POWER8 show it sustaining
52 GiB/sec.
A simple btrfs write performance test:
dd if=/dev/zero of=/mnt/tmpfile bs=1M count=4096
sync
is over 3.7x faster.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>