tree bf6065e606b84170088d78e2dca090666289a8e7
parent 20be4c3c3ed52bfccdb2d59a412ee1a936d175a7
author Lynn Boger <laboger@linux.vnet.ibm.com> 1555012285 -0400
committer Lynn Boger <laboger@linux.vnet.ibm.com> 1559737833 +0000

poly1305: improve performance with asm for ppc64le

This adds an asm implementation for poly1305 on ppc64le, based on
the amd64 asm implementation using the mac interface.

The improvements on a power8 based on the poly1305 benchmarks are:

    name              old time/op   new time/op    delta
    64                  172ns ± 0%      78ns ± 0%   -54.77%  (p=1.000 n=1+1)
    1K                 1.47µs ± 0%    0.59µs ± 0%   -59.69%  (p=1.000 n=1+1)
    2M                 2.84ms ± 0%    1.12ms ± 0%   -60.47%  (p=1.000 n=1+1)
    64Unaligned         172ns ± 0%      78ns ± 0%   -54.59%  (p=1.000 n=1+1)
    1KUnaligned        1.47µs ± 0%    0.59µs ± 0%   -59.69%  (p=1.000 n=1+1)
    2MUnaligned        2.84ms ± 0%    1.13ms ± 0%   -60.23%  (p=1.000 n=1+1)
    Write64             100ns ± 0%      46ns ± 0%   -53.80%  (p=1.000 n=1+1)
    Write1K            1.40µs ± 0%    0.56µs ± 0%   -59.90%  (p=1.000 n=1+1)
    Write2M            2.84ms ± 0%    1.12ms ± 0%   -60.46%  (p=1.000 n=1+1)
    Write64Unaligned    100ns ± 0%      46ns ± 0%   -53.60%  (p=1.000 n=1+1)
    Write1KUnaligned   1.40µs ± 0%    0.56µs ± 0%   -59.90%  (p=1.000 n=1+1)
    Write2MUnaligned   2.84ms ± 0%    1.13ms ± 0%   -60.22%  (p=1.000 n=1+1)

Change-Id: I77cc9bb3645a6b1a6edc414b5651dc37ae4a7410
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/173421
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Munday <mike.munday@ibm.com>