[glibc/release/2.28/master] x86: Add AVX512VL_Usable and AVX512BW_Usable

[glibc/release/2.28/master] x86: Add AVX512VL_Usable and AVX512BW_Usable

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e8078d2ac516560ce54b8383f34372853402629c

commit e8078d2ac516560ce54b8383f34372853402629c
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Mar 29 13:13:32 2021 -0700

    x86: Add AVX512VL_Usable and AVX512BW_Usable
    
    Add AVX512VL_Usable and AVX512BW_Usable for backporting string/memory
    functions optimized with 256-bit EVEX.

Diff:
---
 sysdeps/x86/cpu-features.c | 8 ++++++++
 sysdeps/x86/cpu-features.h | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 5ddc8eebf4..4be4be7051 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -130,6 +130,14 @@ get_common_indeces (struct cpu_features *cpu_features,
 		{
 		  cpu_features->feature[index_arch_AVX512F_Usable]
 		    |= bit_arch_AVX512F_Usable;
+		  /* Determine if AVX512VL is usable.  */
+		  if (CPU_FEATURES_CPU_P (cpu_features, AVX512VL))
+		    cpu_features->feature[index_arch_AVX512VL_Usable]
+		      |= bit_arch_AVX512VL_Usable;
+		  /* Determine if AVX512BW is usable.  */
+		  if (CPU_FEATURES_CPU_P (cpu_features, AVX512BW))
+		    cpu_features->feature[index_arch_AVX512BW_Usable]
+		      |= bit_arch_AVX512BW_Usable;
 		  /* Determine if AVX512DQ is usable.  */
 		  if (CPU_FEATURES_CPU_P (cpu_features, AVX512DQ))
 		    cpu_features->feature[index_arch_AVX512DQ_Usable]
diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h
index 1f60296e7b..177aa0ebc8 100644
--- a/sysdeps/x86/cpu-features.h
+++ b/sysdeps/x86/cpu-features.h
@@ -42,6 +42,8 @@
 #define bit_arch_XSAVEC_Usable			(1 << 22)
 #define bit_arch_Prefer_FSRM			(1 << 23)
 #define bit_arch_Prefer_AVX2_STRCMP		(1 << 24)
+#define bit_arch_AVX512VL_Usable		(1 << 25)
+#define bit_arch_AVX512BW_Usable		(1 << 26)
 
 /* CPUID Feature flags.  */
 
@@ -268,6 +270,8 @@ extern const struct cpu_features *__get_cpu_features (void)
 # define index_arch_XSAVEC_Usable	FEATURE_INDEX_1
 # define index_arch_Prefer_FSRM		FEATURE_INDEX_1
 # define index_arch_Prefer_AVX2_STRCMP	FEATURE_INDEX_1
+# define index_arch_AVX512VL_Usable	FEATURE_INDEX_1
+# define index_arch_AVX512BW_Usable	FEATURE_INDEX_1
 
 #endif	/* !__ASSEMBLER__ */