[PATCH v2] hash: fix thash gfni implementation

[David Marchand]

On Tue, Nov 16, 2021 at 3:10 PM Bruce Richardson
<bruce.richardson at intel.com> wrote:
>
> On Tue, Nov 16, 2021 at 02:53:49PM +0100, David Marchand wrote:
> > On Fri, Nov 12, 2021 at 3:17 PM Vladimir Medvedkin
> > <vladimir.medvedkin at intel.com> wrote:
> > >
> > > 1. This patch replaces _mm512_set_epi8 with _mm512_set_epi32
> > > due to the lack of support by some compilers.
> >
> > Ok, it was the initial report from Lance.
> >
> > > 2. This patch checks if AVX512F is supported along with GFNI.
> > > This is done if the code is built on a platform that supports GFNI,
> > > but does not support AVX512.
> >
> > Ok.
> >
> > > 3. Also this patch fixes compilation problems on 32bit arch due to
> > > lack of support for _mm_extract_epi64() by implementing XOR folding
> > > with _mm_extract_epi32() on 32-bit arch.
> >
> > This code is under a #if defined(__GFNI__) && defined(__AVX512F__).
> >
> > Does such a 32 bits processor exist, that supports AVX512 and GFNI?
> >
> The processor would be 64-bit but the code could well be 32-bit, and even
> then can still use these AVX512 instruction sets.

Oh, thanks for the explanation.


-- 
David Marchand