WIP

Author: serge-sans-paille

include/xsimd/arch/xsimd_avx512f.hpp

@@ -413,11 +413,11 @@ namespace xsimd
 
                 constexpr mask_register_type lo_bitmask = xsimd::utils::make_low_mask<mask_register_type>(mask.size / 2);
                 mask_register_type lo_mask = nmask & lo_bitmask;
-                lo_mask |= lo_mask << (mask.size / 2);
+                lo_mask = detail::interleave(lo_mask);
 
                 constexpr mask_register_type hi_bitmask = lo_bitmask << (mask.size / 2);
                 mask_register_type hi_mask = nmask & hi_bitmask;
-                hi_mask |= hi_mask >> (mask.size / 2);
+                hi_mask = detail::interleave(hi_mask);
 
                 return { batch_bool<T, A> { lo_mask }, batch_bool<T, A> { hi_mask } };
             }