RE: [PATCH] [X86]: Fix zen6 AVX512BMM cpuid check.

AMD General

Hi HJ,

> -----Original Message-----
> From: H.J. Lu <[email protected]>
> Sent: 21 August 2026 10:11
> To: Jiang, Haochen <[email protected]>
> Cc: Kumar, Venkataramanan <[email protected]>; Sharma,
> Dipesh <[email protected]>; [email protected]; Liu, Hongtao
> <[email protected]>; [email protected]; [email protected];
> [email protected]
> Subject: Re: [PATCH] [X86]: Fix zen6 AVX512BMM cpuid check.
>
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>
>
> On Fri, Aug 21, 2026 at 11:20 AM Jiang, Haochen <[email protected]>
> wrote:
> >
> > > From: H.J. Lu <[email protected]>
> > > Sent: Friday, August 21, 2026 5:14 AM
> > >
> > > Please fix
> > >
> > > /* Sub leaf (%eax == 0x21) */
> > > #define bit_AVX512BMM   ( 1<<23 )
> > >
> > > in cpuid.h.
> > >
> >
> > Agreed. Although it will not lead to functionality issue, but please
> > maintain it cleanly to avoid confusion.
>
> Please also add a test for
>
> __builtin_cpu_supports ("avx512bmm")
Sure, I'll Update and resend the patch I just sent.
>
> > And you may also need to backport right, Venkat and Dipesh?
> >
> > Thx,
> > Haochen
>
>
>
> --
> H.J.