tree 70afaca9e2cca574fee09e68e9637ee3f0a3c1d7
parent 193df9c0f06f8bb35fba505183eaf0acc0136505
author Meng Zhuo <mengzhuo1203@gmail.com> 1549803550 +0800
committer Filippo Valsorda <filippo@golang.org> 1549909697 +0000

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>