[glibc] <sys/platform/x86.h>: Add AVX-VNNI-INT8 support

[glibc] <sys/platform/x86.h>: Add AVX-VNNI-INT8 support

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4c120c88a631cf038520556144860d3ad5a4d0e3

commit 4c120c88a631cf038520556144860d3ad5a4d0e3
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Apr 5 09:21:41 2023 -0700

    <sys/platform/x86.h>: Add AVX-VNNI-INT8 support
    
    Add AVX-VNNI-INT8 support to <sys/platform/x86.h>.
    Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>

Diff:
---
 manual/platform.texi               | 3 +++
 sysdeps/x86/bits/platform/x86.h    | 6 ++++++
 sysdeps/x86/cpu-features.c         | 2 ++
 sysdeps/x86/include/cpu-features.h | 7 +++++++
 sysdeps/x86/tst-get-cpu-features.c | 2 ++
 5 files changed, 20 insertions(+)

diff --git a/manual/platform.texi b/manual/platform.texi
index bfccd024a5..873ea0a84a 100644
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -225,6 +225,9 @@ Leaf (EAX = 23H).
 @item
 @code{AVX_VNNI} -- The AVX-VNNI instruction extensions.
 
+@item
+@code{AVX_VNNI_INT8} -- The AVX-VNNI-INT8 instruction extensions.
+
 @item
 @code{AVX512_4FMAPS} -- The AVX512_4FMAPS instruction extensions.
 
diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h
index 57973e9a6c..7b239ef188 100644
--- a/sysdeps/x86/bits/platform/x86.h
+++ b/sysdeps/x86/bits/platform/x86.h
@@ -304,6 +304,12 @@ enum
   x86_cpu_LAM			= x86_cpu_index_7_ecx_1_eax + 26,
   x86_cpu_MSRLIST		= x86_cpu_index_7_ecx_1_eax + 27,
 
+  x86_cpu_index_7_ecx_1_edx
+    = (CPUID_INDEX_7_ECX_1 * 8 * 4 * sizeof (unsigned int)
+       + cpuid_register_index_edx * 8 * sizeof (unsigned int)),
+
+  x86_cpu_AVX_VNNI_INT8		= x86_cpu_index_7_ecx_1_edx + 4,
+
   x86_cpu_index_19_ebx
     = (CPUID_INDEX_19 * 8 * 4 * sizeof (unsigned int)
        + cpuid_register_index_ebx * 8 * sizeof (unsigned int)),
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 06fae443a8..f34f4884eb 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -143,6 +143,8 @@ update_active (struct cpu_features *cpu_features)
 	      CPU_FEATURE_SET_ACTIVE (cpu_features, AVX_IFMA);
 	      /* Determine if AVX-VNNI is usable.  */
 	      CPU_FEATURE_SET_ACTIVE (cpu_features, AVX_VNNI);
+	      /* Determine if AVX-VNNI-INT8 is usable.  */
+	      CPU_FEATURE_SET_ACTIVE (cpu_features, AVX_VNNI_INT8);
 	      /* Determine if FMA is usable.  */
 	      CPU_FEATURE_SET_ACTIVE (cpu_features, FMA);
 	      /* Determine if VAES is usable.  */
diff --git a/sysdeps/x86/include/cpu-features.h b/sysdeps/x86/include/cpu-features.h
index 1f4b6831f9..5e09c58d9c 100644
--- a/sysdeps/x86/include/cpu-features.h
+++ b/sysdeps/x86/include/cpu-features.h
@@ -314,6 +314,9 @@ enum
 #define bit_cpu_AVX_IFMA	(1u << 23)
 #define bit_cpu_LAM		(1u << 26)
 
+/* EDX.  */
+#define bit_cpu_AVX_VNNI_INT8	(1u << 4)
+
 /* CPUID_INDEX_19.  */
 
 /* EBX.  */
@@ -552,6 +555,7 @@ enum
 #define index_cpu_HRESET	CPUID_INDEX_7_ECX_1
 #define index_cpu_AVX_IFMA	CPUID_INDEX_7_ECX_1
 #define index_cpu_LAM		CPUID_INDEX_7_ECX_1
+#define index_cpu_AVX_VNNI_INT8	CPUID_INDEX_7_ECX_1
 
 /* CPUID_INDEX_19.  */
 
@@ -792,6 +796,9 @@ enum
 #define reg_AVX_IFMA		eax
 #define reg_LAM			eax
 
+/* EDX.  */
+#define reg_AVX_VNNI_INT8	edx
+
 /* CPUID_INDEX_19.  */
 
 /* EBX.  */
diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
index 0c948c2b04..f0585cf330 100644
--- a/sysdeps/x86/tst-get-cpu-features.c
+++ b/sysdeps/x86/tst-get-cpu-features.c
@@ -215,6 +215,7 @@ do_test (void)
   CHECK_CPU_FEATURE_PRESENT (AVX_IFMA);
   CHECK_CPU_FEATURE_PRESENT (LAM);
   CHECK_CPU_FEATURE_PRESENT (MSRLIST);
+  CHECK_CPU_FEATURE_PRESENT (AVX_VNNI_INT8);
   CHECK_CPU_FEATURE_PRESENT (AESKLE);
   CHECK_CPU_FEATURE_PRESENT (WIDE_KL);
   CHECK_CPU_FEATURE_PRESENT (PTWRITE);
@@ -382,6 +383,7 @@ do_test (void)
   CHECK_CPU_FEATURE_ACTIVE (FSRCS);
   CHECK_CPU_FEATURE_ACTIVE (AMX_FP16);
   CHECK_CPU_FEATURE_ACTIVE (AVX_IFMA);
+  CHECK_CPU_FEATURE_ACTIVE (AVX_VNNI_INT8);
   CHECK_CPU_FEATURE_ACTIVE (AESKLE);
   CHECK_CPU_FEATURE_ACTIVE (WIDE_KL);
   CHECK_CPU_FEATURE_ACTIVE (PTWRITE);