Re: [PATCH] x86: Add Cooper Lake detection with AVX512BF16

[Uros Bizjak via Gcc-patches]

On Wed, Jun 24, 2020 at 3:12 PM H.J. Lu  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
>

[PATCH] x86: Add Cooper Lake detection with AVX512BF16

[H.J. Lu via Gcc-patches]

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.
---
 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