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Diffstat (limited to 'sysdeps/x86/cpu-features.c')
-rw-r--r--sysdeps/x86/cpu-features.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 9afd74c42e..5019f156c8 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -235,10 +235,13 @@ init_cpu_features (struct cpu_features *cpu_features)
 	  |= bit_arch_Prefer_No_AVX512;
 
       /* To avoid SSE transition penalty, use _dl_runtime_resolve_slow.
-         If XGETBV suports ECX == 1, use _dl_runtime_resolve_opt.  */
+         If XGETBV suports ECX == 1, use _dl_runtime_resolve_opt.
+	 Use _dl_runtime_resolve_opt only with AVX512F since it is
+	 slower than _dl_runtime_resolve_slow with AVX.  */
       cpu_features->feature[index_arch_Use_dl_runtime_resolve_slow]
 	|= bit_arch_Use_dl_runtime_resolve_slow;
-      if (cpu_features->max_cpuid >= 0xd)
+      if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable)
+	  && cpu_features->max_cpuid >= 0xd)
 	{
 	  unsigned int eax;