[PATCH] x86: Add Cooper Lake detection with AVX512BF16

[Uros Bizjak]

On Wed, Jun 24, 2020 at 3:12 PM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> All Sky Lake family processors have the same CPUID model number, 0x55.
> The differences are Cascade Lake has AVX512VNNI and Cooper Lake has
> AVX512VNNI + AVX512BF16.  Check AVX512BF16 for Cooper Lake.
>
>         PR target/95774
>         * common/config/i386/cpuinfo.h (get_intel_cpu): Add Cooper Lake
>         detection with AVX512BF16.

OK.

Thanks,
Uros.

> ---
>  gcc/common/config/i386/cpuinfo.h | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/gcc/common/config/i386/cpuinfo.h b/gcc/common/config/i386/cpuinfo.h
> index 0a0e88011bc..3eda53240f6 100644
> --- a/gcc/common/config/i386/cpuinfo.h
> +++ b/gcc/common/config/i386/cpuinfo.h
> @@ -397,7 +397,15 @@ get_intel_cpu (struct __processor_model *cpu_model,
>        CHECK___builtin_cpu_is ("corei7");
>        cpu_model->__cpu_type = INTEL_COREI7;
>        if (has_cpu_feature (cpu_model, cpu_features2,
> -                          FEATURE_AVX512VNNI))
> +                          FEATURE_AVX512BF16))
> +       {
> +         /* Cooper Lake.  */
> +         cpu = "cooperlake";
> +         CHECK___builtin_cpu_is ("cooperlake");
> +         cpu_model->__cpu_subtype = INTEL_COREI7_COOPERLAKE;
> +       }
> +      else if (has_cpu_feature (cpu_model, cpu_features2,
> +                               FEATURE_AVX512VNNI))
>         {
>           /* Cascade Lake.  */
>           cpu = "cascadelake";
> --
> 2.26.2
>