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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2022-07-21 10:05:03 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-22 11:58:27 -0300 |
| commit | e169aff0e9aacdcf466357247f1759f2c84b7fe4 (patch) | |
| tree | df2413bece130a87d8b1825aef6dd4e6eea14213 /LICENSES | |
| parent | 4c128c7823e5a19058589cfac42aa96de3e15430 (diff) | |
| download | glibc-e169aff0e9aacdcf466357247f1759f2c84b7fe4.tar glibc-e169aff0e9aacdcf466357247f1759f2c84b7fe4.tar.gz glibc-e169aff0e9aacdcf466357247f1759f2c84b7fe4.tar.bz2 glibc-e169aff0e9aacdcf466357247f1759f2c84b7fe4.zip | |
x86: Add SSE2 optimized chacha20
It adds vectorized ChaCha20 implementation based on libgcrypt
cipher/chacha20-amd64-ssse3.S. It replaces the ROTATE_SHUF_2 (which
uses pshufb) by ROTATE2 and thus making the original implementation
SSE2.
As for generic implementation, the last step that XOR with the
input is omited. The final state register clearing is also
omitted.
On a Ryzen 9 5900X it shows the following improvements (using
formatted bench-arc4random data):
GENERIC MB/s
-----------------------------------------------
arc4random [single-thread] 443.11
arc4random_buf(16) [single-thread] 552.27
arc4random_buf(32) [single-thread] 626.86
arc4random_buf(48) [single-thread] 649.81
arc4random_buf(64) [single-thread] 663.95
arc4random_buf(80) [single-thread] 674.78
arc4random_buf(96) [single-thread] 675.17
arc4random_buf(112) [single-thread] 680.69
arc4random_buf(128) [single-thread] 683.20
-----------------------------------------------
SSE MB/s
-----------------------------------------------
arc4random [single-thread] 704.25
arc4random_buf(16) [single-thread] 1018.17
arc4random_buf(32) [single-thread] 1315.27
arc4random_buf(48) [single-thread] 1449.36
arc4random_buf(64) [single-thread] 1511.16
arc4random_buf(80) [single-thread] 1539.48
arc4random_buf(96) [single-thread] 1571.06
arc4random_buf(112) [single-thread] 1596.16
arc4random_buf(128) [single-thread] 1613.48
-----------------------------------------------
Checked on x86_64-linux-gnu.
Diffstat (limited to 'LICENSES')
| -rw-r--r-- | LICENSES | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -390,8 +390,8 @@ Copyright 2001 by Stephen L. Moshier <moshier@na-net.ornl.gov> License along with this library; if not, see <https://www.gnu.org/licenses/>. */ -sysdeps/aarch64/chacha20-aarch64.S imports code from libgcrypt, with -the following notices: +sysdeps/aarch64/chacha20-aarch64.S and sysdeps/x86_64/chacha20-amd64-sse2.S +imports code from libgcrypt, with the following notices: Copyright (C) 2017-2019 Jussi Kivilinna <jussi.kivilinna@iki.fi> |