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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2022-07-21 10:05:05 -0300 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-22 11:58:27 -0300 |
| commit | b7060acfe8e80fe832e3227020d1127f2d971d1c (patch) | |
| tree | 932a620922c50bb401ce28d02d45c4ba7b638c16 /manual | |
| parent | 84cfc6479bdabcca2e0b8099459dae1b51d3a4a3 (diff) | |
| download | glibc-b7060acfe8e80fe832e3227020d1127f2d971d1c.tar.gz glibc-b7060acfe8e80fe832e3227020d1127f2d971d1c.tar.xz glibc-b7060acfe8e80fe832e3227020d1127f2d971d1c.zip | |
powerpc64: Add optimized chacha20
It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-ppc.c. It targets POWER8 and it is used on default for LE. On a POWER8 it shows the following improvements (using formatted bench-arc4random data): POWER8 GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 138.77 arc4random_buf(16) [single-thread] 174.36 arc4random_buf(32) [single-thread] 228.11 arc4random_buf(48) [single-thread] 252.31 arc4random_buf(64) [single-thread] 270.11 arc4random_buf(80) [single-thread] 278.97 arc4random_buf(96) [single-thread] 287.78 arc4random_buf(112) [single-thread] 291.92 arc4random_buf(128) [single-thread] 295.25 POWER8 MB/s ----------------------------------------------- arc4random [single-thread] 198.06 arc4random_buf(16) [single-thread] 278.79 arc4random_buf(32) [single-thread] 448.89 arc4random_buf(48) [single-thread] 551.09 arc4random_buf(64) [single-thread] 646.12 arc4random_buf(80) [single-thread] 698.04 arc4random_buf(96) [single-thread] 756.06 arc4random_buf(112) [single-thread] 784.12 arc4random_buf(128) [single-thread] 808.04 ----------------------------------------------- Checked on powerpc64-linux-gnu and powerpc64le-linux-gnu. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
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