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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2022-07-21 10:05:06 -0300 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-22 11:58:27 -0300 |
| commit | 3b56f944c5398114486d6abd60c465682b802072 (patch) | |
| tree | e7c0b81f5be27aee611de6dad9fba15325dccb1f /manual | |
| parent | b7060acfe8e80fe832e3227020d1127f2d971d1c (diff) | |
| download | glibc-3b56f944c5398114486d6abd60c465682b802072.tar.gz glibc-3b56f944c5398114486d6abd60c465682b802072.tar.xz glibc-3b56f944c5398114486d6abd60c465682b802072.zip | |
s390x: Add optimized chacha20
It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-s390x.S. The final state register clearing is omitted. On a z15 it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 198.92 arc4random_buf(16) [single-thread] 244.49 arc4random_buf(32) [single-thread] 282.73 arc4random_buf(48) [single-thread] 286.64 arc4random_buf(64) [single-thread] 320.06 arc4random_buf(80) [single-thread] 297.43 arc4random_buf(96) [single-thread] 310.96 arc4random_buf(112) [single-thread] 308.10 arc4random_buf(128) [single-thread] 309.90 ----------------------------------------------- VX. MB/s ----------------------------------------------- arc4random [single-thread] 430.26 arc4random_buf(16) [single-thread] 735.14 arc4random_buf(32) [single-thread] 1029.99 arc4random_buf(48) [single-thread] 1206.76 arc4random_buf(64) [single-thread] 1311.92 arc4random_buf(80) [single-thread] 1378.74 arc4random_buf(96) [single-thread] 1445.06 arc4random_buf(112) [single-thread] 1484.32 arc4random_buf(128) [single-thread] 1517.30 ----------------------------------------------- Checked on s390x-linux-gnu.
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