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commit ebe454bcca6a5421512ad228595a5391506e990a
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Thu Oct 8 08:24:47 2020 -0700
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<sys/platform/x86.h>: Add AVX512_FP16 support
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Add AVX512_FP16 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 0dd12a4353a93bf2..4f5fdff9d9ef16fd 100644
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--- a/manual/platform.texi
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+++ b/manual/platform.texi
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@@ -210,6 +210,9 @@ The supported processor features are:
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@item
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@code{AVX512_BITALG} -- The AVX512_BITALG instruction extensions.
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+@item
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+@code{AVX512_FP16} -- The AVX512_FP16 instruction extensions.
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+
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@item
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@code{AVX512_IFMA} -- The AVX512_IFMA 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 7f2ff00f2b4b45f2..67f137259fccf4ad 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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@@ -175,6 +175,8 @@ update_usable (struct cpu_features *cpu_features)
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AVX512_VP2INTERSECT);
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/* Determine if AVX512_BF16 is usable. */
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CPU_FEATURE_SET_USABLE (cpu_features, AVX512_BF16);
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+ /* Determine if AVX512_FP16 is usable. */
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+ CPU_FEATURE_SET_USABLE (cpu_features, AVX512_FP16);
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}
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}
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}
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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 2760b81a56e6c7d7..0b18257e20105ea4 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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@@ -259,7 +259,7 @@ extern const struct cpu_features *__x86_get_cpu_features (unsigned int)
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#define bit_cpu_IBT (1u << 20)
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#define bit_cpu_INDEX_7_EDX_21 (1u << 21)
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#define bit_cpu_AMX_BF16 (1u << 22)
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-#define bit_cpu_INDEX_7_EDX_23 (1u << 23)
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+#define bit_cpu_AVX512_FP16 (1u << 23)
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#define bit_cpu_AMX_TILE (1u << 24)
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#define bit_cpu_AMX_INT8 (1u << 25)
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#define bit_cpu_IBRS_IBPB (1u << 26)
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@@ -478,7 +478,7 @@ extern const struct cpu_features *__x86_get_cpu_features (unsigned int)
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#define index_cpu_IBT COMMON_CPUID_INDEX_7
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#define index_cpu_INDEX_7_EDX_21 COMMON_CPUID_INDEX_7
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#define index_cpu_AMX_BF16 COMMON_CPUID_INDEX_7
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-#define index_cpu_INDEX_7_EDX_23 COMMON_CPUID_INDEX_7
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+#define index_cpu_AVX512_FP16 COMMON_CPUID_INDEX_7
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#define index_cpu_AMX_TILE COMMON_CPUID_INDEX_7
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#define index_cpu_AMX_INT8 COMMON_CPUID_INDEX_7
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#define index_cpu_IBRS_IBPB COMMON_CPUID_INDEX_7
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@@ -697,7 +697,7 @@ extern const struct cpu_features *__x86_get_cpu_features (unsigned int)
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#define reg_IBT edx
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#define reg_INDEX_7_EDX_21 edx
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#define reg_AMX_BF16 edx
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-#define reg_INDEX_7_EDX_23 edx
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+#define reg_AVX512_FP16 edx
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#define reg_AMX_TILE edx
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#define reg_AMX_INT8 edx
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#define reg_IBRS_IBPB edx
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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 6fa092a8c10486a0..bcdeb243a82c4adc 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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@@ -189,6 +189,7 @@ do_test (void)
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CHECK_CPU_FEATURE (PCONFIG);
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CHECK_CPU_FEATURE (IBT);
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CHECK_CPU_FEATURE (AMX_BF16);
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+ CHECK_CPU_FEATURE (AVX512_FP16);
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CHECK_CPU_FEATURE (AMX_TILE);
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CHECK_CPU_FEATURE (AMX_INT8);
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CHECK_CPU_FEATURE (IBRS_IBPB);
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@@ -343,6 +344,7 @@ do_test (void)
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CHECK_CPU_FEATURE_USABLE (TSXLDTRK);
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CHECK_CPU_FEATURE_USABLE (PCONFIG);
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CHECK_CPU_FEATURE_USABLE (AMX_BF16);
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+ CHECK_CPU_FEATURE_USABLE (AVX512_FP16);
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CHECK_CPU_FEATURE_USABLE (AMX_TILE);
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CHECK_CPU_FEATURE_USABLE (AMX_INT8);
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CHECK_CPU_FEATURE_USABLE (IBRS_IBPB);
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