| commit | 03c59bcbfc258e1c4bda44ca990c9ffd9bcbb869 | |
| author | Erik Lindahl <erik.lindahl@gmail.com> | |
| Thu, 22 Aug 2019 21:42:15 +0000 (22 23:42 +0200) | ||
| committer | Paul Bauer <paul.bauer.q@gmail.com> | |
| Fri, 23 Aug 2019 11:45:12 +0000 (23 13:45 +0200) | ||
| tree | 8f07301d86527b915f73c57eaf4e0e7c09f9e6a3 | treesnapshot (tar.gz zip) |
| parent | 1706a84488ce15430c77eeb3145c59e50efbde91 | commitdiff |
Default to AVX2_256 SIMD for Zen2
From Zen2, we should no longer use the previous
hack with 128-bit AVX2 since the microarchitecture
can now execute two full-width AVX2 instructions
per cycle. Rather than specializing for Zen2, the
logic has been changed so we only apply the 128-bit
optimization for the chips where we know it helps
(Zen and Zen+, based on the model numbers), while
we default to full-width AVX2 for all other AMD
CPUs - which for now is only Zen2.
Fixes #3061.
Change-Id: I66017b200cd627bb9792f53ee39dd80d8e05965a
From Zen2, we should no longer use the previous
hack with 128-bit AVX2 since the microarchitecture
can now execute two full-width AVX2 instructions
per cycle. Rather than specializing for Zen2, the
logic has been changed so we only apply the 128-bit
optimization for the chips where we know it helps
(Zen and Zen+, based on the model numbers), while
we default to full-width AVX2 for all other AMD
CPUs - which for now is only Zen2.
Fixes #3061.
Change-Id: I66017b200cd627bb9792f53ee39dd80d8e05965a
| cmake/gmxDetectSimd.cmake | diffblobblamehistory | |
| src/gromacs/simd/support.cpp | diffblobblamehistory |