On 29/02/20 13:34, Robert Hoo wrote:
> 1) Introduce {enable,disable}-avx512f configure option
>
> 2) Implement new buffer_zero_avx512() with AVX512F instructions
>
> Changes in v4:
> In init_cpuid_cache(), stringently test AVX512F OS level enablement.
>
> Changes in v3:
> In init_accel(), init length_to_accel value in every accel case, because
> in unit test, it will be invoked several times with different accel cases.
> (Thanks Richard's careful review)
>
> Changes in v2:
> 1. Fixes wrong definition of CACHE_SSE2 in v1.
> 2. Fixes not handle <256 length case in buffer_zero_avx512() implementaion.
> (Follow Richard's suggestion: handle the case in select_accel_fn(), and have a
> global variable alongside buffer_accel)
> 3. Changes avx512f configuration option's default status to disabled.
> 4. Ran 'make check-unit' on this patch, on both a Ivybridge machine and a
> CascadeLake machine.
>
>
> Robert Hoo (2):
> configure: add configure option avx512f_opt
> util: add util function buffer_zero_avx512()
>
> configure | 41 +++++++++++++++++++++++++++++
> include/qemu/cpuid.h | 3 +++
> util/bufferiszero.c | 74
> +++++++++++++++++++++++++++++++++++++++++++++-------
> 3 files changed, 108 insertions(+), 10 deletions(-)
>
Queued, thanks.
Paolo
