Update AVX512 threshold

kimwalisch · Jun 26, 2024 · a1d2fa1 · a1d2fa1
1 parent 45f223b
commit a1d2fa1
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/benchmark.cpp b/benchmark.cpp
@@ -92,15 +92,15 @@ int main(int argc, char* argv[])
 
   #if defined(LIBPOPCNT_HAVE_CPUID)
     int cpuid = get_cpuid();
-    if ((cpuid & LIBPOPCNT_BIT_AVX512_VPOPCNTDQ) && bytes >= 32)
+    if ((cpuid & LIBPOPCNT_BIT_AVX512_VPOPCNTDQ) && bytes >= 48)
       algo = "AVX512";
     else if ((cpuid & LIBPOPCNT_BIT_AVX2) && bytes >= 512)
       algo = "AVX2";
     else if (cpuid & LIBPOPCNT_BIT_POPCNT)
       algo = "POPCNT";
   #else
     #if defined(LIBPOPCNT_HAVE_AVX512) && (defined(__AVX512__) || (defined(__AVX512F__) && defined(__AVX512VPOPCNTDQ__)))
-      if (algo.empty() && bytes >= 1024)
+      if (algo.empty() && bytes >= 48)
         algo = "AVX512";
     #endif
     #if defined(LIBPOPCNT_HAVE_AVX2) && defined(__AVX2__)