| commit | 570db57b3ce38bd13c1ed3d13d1a34264f42e590 | |
| author | Erik Lindahl <erik.lindahl@gmail.com> | |
| Tue, 14 Mar 2017 13:35:35 +0000 (14 14:35 +0100) | ||
| committer | Erik Lindahl <erik.lindahl@gmail.com> | |
| Sun, 19 Mar 2017 12:16:40 +0000 (19 13:16 +0100) | ||
| tree | aa9817d2ec20bf99469dcf64f48006b93d359643 | treesnapshot (tar.gz zip) |
| parent | 4dbb7fdefc0e8faa2c5dda36eaf1ae4a95c5b501 | commitdiff |
128-bit AVX2 SIMD for AMD Ryzen
While Ryzen supports 256-bit AVX2, the internal units are organized
to execute either a single 256-bit instruction or two 128-bit SIMD
instruction per cycle. Since most of our kernels are slightly
less efficient for wider SIMD, this improves performance by roughly
10%.
Change-Id: Ie601b1dbe13d70334cdf9284e236ad9132951ec9
While Ryzen supports 256-bit AVX2, the internal units are organized
to execute either a single 256-bit instruction or two 128-bit SIMD
instruction per cycle. Since most of our kernels are slightly
less efficient for wider SIMD, this improves performance by roughly
10%.
Change-Id: Ie601b1dbe13d70334cdf9284e236ad9132951ec9
18 files changed: