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commit 875a50ff63b2c86af770949d563ee851d08eb46e
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Thu Oct 8 08:33:45 2020 -0700
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<sys/platform/x86.h>: Add AVX-VNNI support
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Add AVX-VNNI support to <sys/platform/x86.h>.
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diff --git a/manual/platform.texi b/manual/platform.texi
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index 4f5fdff9d9ef16fd..283f255679643d3e 100644
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--- a/manual/platform.texi
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+++ b/manual/platform.texi
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@@ -198,6 +198,9 @@ The supported processor features are:
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@item
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@code{AVX2} -- The AVX2 instruction extensions.
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+@item
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+@code{AVX_VNNI} -- The AVX-VNNI instruction extensions.
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+
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@item
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@code{AVX512_4FMAPS} -- The AVX512_4FMAPS instruction extensions.
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diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
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index 67f137259fccf4ad..3e5b9341c9756009 100644
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--- a/sysdeps/x86/cpu-features.c
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+++ b/sysdeps/x86/cpu-features.c
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@@ -119,6 +119,8 @@ update_usable (struct cpu_features *cpu_features)
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cpu_features->preferred[index_arch_AVX_Fast_Unaligned_Load]
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|= bit_arch_AVX_Fast_Unaligned_Load;
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}
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+ /* Determine if AVX-VNNI is usable. */
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+ CPU_FEATURE_SET_USABLE (cpu_features, AVX_VNNI);
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/* Determine if FMA is usable. */
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CPU_FEATURE_SET_USABLE (cpu_features, FMA);
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/* Determine if VAES is usable. */
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diff --git a/sysdeps/x86/sys/platform/x86.h b/sysdeps/x86/sys/platform/x86.h
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index 0b18257e20105ea4..0942ad7a7f7d4ce2 100644
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--- a/sysdeps/x86/sys/platform/x86.h
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+++ b/sysdeps/x86/sys/platform/x86.h
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@@ -311,6 +311,7 @@ extern const struct cpu_features *__x86_get_cpu_features (unsigned int)
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/* COMMON_CPUID_INDEX_7_ECX_1. */
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/* EAX. */
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+#define bit_cpu_AVX_VNNI (1u << 4)
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#define bit_cpu_AVX512_BF16 (1u << 5)
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/* COMMON_CPUID_INDEX_19. */
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@@ -530,6 +531,7 @@ extern const struct cpu_features *__x86_get_cpu_features (unsigned int)
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/* COMMON_CPUID_INDEX_7_ECX_1. */
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/* EAX. */
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+#define index_cpu_AVX_VNNI COMMON_CPUID_INDEX_7_ECX_1
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#define index_cpu_AVX512_BF16 COMMON_CPUID_INDEX_7_ECX_1
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/* COMMON_CPUID_INDEX_19. */
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@@ -749,6 +751,7 @@ extern const struct cpu_features *__x86_get_cpu_features (unsigned int)
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/* COMMON_CPUID_INDEX_7_ECX_1. */
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/* EAX. */
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+#define reg_AVX_VNNI eax
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#define reg_AVX512_BF16 eax
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/* COMMON_CPUID_INDEX_19. */
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diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
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index bcdeb243a82c4adc..8894d9f08ac36633 100644
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--- a/sysdeps/x86/tst-get-cpu-features.c
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+++ b/sysdeps/x86/tst-get-cpu-features.c
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@@ -219,6 +219,7 @@ do_test (void)
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CHECK_CPU_FEATURE (XFD);
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CHECK_CPU_FEATURE (INVARIANT_TSC);
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CHECK_CPU_FEATURE (WBNOINVD);
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+ CHECK_CPU_FEATURE (AVX_VNNI);
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CHECK_CPU_FEATURE (AVX512_BF16);
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CHECK_CPU_FEATURE (AESKLE);
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CHECK_CPU_FEATURE (WIDE_KL);
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@@ -374,6 +375,7 @@ do_test (void)
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CHECK_CPU_FEATURE_USABLE (XFD);
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CHECK_CPU_FEATURE_USABLE (INVARIANT_TSC);
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CHECK_CPU_FEATURE_USABLE (WBNOINVD);
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+ CHECK_CPU_FEATURE_USABLE (AVX_VNNI);
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CHECK_CPU_FEATURE_USABLE (AVX512_BF16);
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CHECK_CPU_FEATURE_USABLE (AESKLE);
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CHECK_CPU_FEATURE_USABLE (WIDE_KL);
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