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-rw-r--r--src/vppinfra/vector.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/vppinfra/vector.h b/src/vppinfra/vector.h
index 906d8d8fbfd..8b08db22124 100644
--- a/src/vppinfra/vector.h
+++ b/src/vppinfra/vector.h
@@ -66,7 +66,7 @@
#endif
#endif
-#if defined (__AVX512F__)
+#if defined (__AVX512BITALG__)
#define CLIB_HAVE_VEC512
#endif
@@ -168,7 +168,10 @@ typedef u64 u64x _vector_size (8);
#include <vppinfra/vector_avx2.h>
#endif
-#if defined (__AVX512F__)
+#if defined (__AVX512BITALG__)
+/* Due to power level transition issues, we don't preffer AVX-512 on
+ Skylake X and CascadeLake CPUs, AVX512BITALG is introduced on
+ icelake CPUs */
#include <vppinfra/vector_avx512.h>
#endif