Index: 7zip/C/SwapBytes.c
===================================================================
--- 7zip.orig/C/SwapBytes.c
+++ 7zip/C/SwapBytes.c
@@ -305,11 +305,14 @@ ShufBytes_256(void *items8, const void *
      msvc 19.30+ (VS2022): replaces _mm256_set_m128i(m,m) to vbroadcastf128(m) as we want
   */
   // _mm256_broadcastsi128_si256(*mask128_ptr);
-  /*
-  #define MY_mm256_set_m128i(hi, lo)  _mm256_insertf128_si256(_mm256_castsi128_si256(lo), (hi), 1)
-  MY_mm256_set_m128i
-  */
-      _mm256_set_m128i(
+  #if defined(Z7_GCC_VERSION) && (Z7_GCC_VERSION < 80000)
+    #warning "gcc < 8: using _mm256_set_m128i substitute"
+    #define MY_mm256_set_m128i(hi, lo)  _mm256_insertf128_si256(_mm256_castsi128_si256(lo), (hi), 1)
+  #else
+    #define MY_mm256_set_m128i _mm256_set_m128i
+  #endif
+      //_mm256_set_m128i(
+      MY_mm256_set_m128i(
         *(const __m128i *)mask128_ptr,
         *(const __m128i *)mask128_ptr);
  #endif