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Author SHA1 Message Date
Meng Zhuo 74369b46fc internal/chacha20: add SIMD implementation on arm64 
Inspired by Vectorization of ChaCha Stream Cipher
https://eprint.iacr.org/2013/759.pdf

name            old time/op    new time/op    delta
ChaCha20/32        690ns ± 0%     872ns ± 0%   +26.38%  (p=0.000 n=10+10)
ChaCha20/63        750ns ± 0%     987ns ± 0%   +31.53%  (p=0.000 n=10+10)
ChaCha20/64        674ns ± 0%     879ns ± 0%   +30.42%  (p=0.000 n=8+10)
ChaCha20/256      2.28µs ± 0%    0.82µs ± 0%   -64.13%  (p=0.000 n=10+10)
ChaCha20/1024     8.64µs ± 0%    2.92µs ± 0%   -66.15%  (p=0.000 n=9+9)
ChaCha20/1350     11.9µs ± 0%     4.5µs ± 0%   -62.51%  (p=0.000 n=10+8)
ChaCha20/65536     554µs ± 0%     181µs ± 0%   -67.33%  (p=0.000 n=10+10)

name            old speed      new speed      delta
ChaCha20/32     46.3MB/s ± 0%  36.7MB/s ± 0%   -20.87%  (p=0.000 n=10+9)
ChaCha20/63     83.9MB/s ± 0%  63.8MB/s ± 0%   -23.97%  (p=0.000 n=10+10)
ChaCha20/64     94.9MB/s ± 0%  72.8MB/s ± 0%   -23.31%  (p=0.000 n=10+10)
ChaCha20/256     112MB/s ± 0%   312MB/s ± 0%  +178.74%  (p=0.000 n=10+10)
ChaCha20/1024    119MB/s ± 0%   350MB/s ± 0%  +195.31%  (p=0.000 n=10+9)
ChaCha20/1350    114MB/s ± 0%   303MB/s ± 0%  +166.73%  (p=0.000 n=8+8)
ChaCha20/65536   118MB/s ± 0%   362MB/s ± 0%  +206.12%  (p=0.000 n=10+10)

Updates golang/go#22809
Change-Id: I487487faa2ae4ff29de6fd8eb1317740c2939c10
Reviewed-on: https://go-review.googlesource.com/c/107628
Reviewed-by: Filippo Valsorda <filippo@golang.org>
 2019-02-11 18:28:17 +00:00
Michael Munday b49d69b5da internal/chacha20: add s390x SIMD implementation 
Based on the SIMD algorithm described in:
ChaCha, a variant of Salsa20 by Daniel J. Bernstein
https://cr.yp.to/chacha/chacha-20080128.pdf

Requires the vector facility (vx).

name            old speed     new speed      delta
ChaCha20/32     178MB/s ± 0%   174MB/s ± 0%    -2.10%  (p=0.000 n=9+10)
ChaCha20/63     341MB/s ± 0%   337MB/s ± 0%    -1.16%  (p=0.000 n=10+10)
ChaCha20/64     367MB/s ± 0%   335MB/s ± 0%    -8.73%  (p=0.000 n=10+10)
ChaCha20/256    404MB/s ± 0%  1448MB/s ± 0%  +258.61%  (p=0.000 n=9+10)
ChaCha20/1024   410MB/s ± 0%  1568MB/s ± 0%  +282.73%  (p=0.000 n=9+10)
ChaCha20/1350   393MB/s ± 0%  1389MB/s ± 0%  +253.58%  (p=0.000 n=10+10)
ChaCha20/65536  414MB/s ± 0%  1634MB/s ± 0%  +294.79%  (p=0.000 n=10+10)

Change-Id: I9a600fb5ae8ee3f3b81ae6b01cff139c1272d684
Reviewed-on: https://go-review.googlesource.com/35842
Run-TryBot: Michael Munday <mike.munday@ibm.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2018-04-26 23:03:45 +00:00