--- old/src/hotspot/cpu/x86/vm_version_x86.cpp 2018-12-03 17:07:00.797814200 -0800 +++ new/src/hotspot/cpu/x86/vm_version_x86.cpp 2018-12-03 17:07:00.218470100 -0800 @@ -1291,7 +1291,7 @@ if (FLAG_IS_DEFAULT(UseXMMForArrayCopy)) { UseXMMForArrayCopy = true; // use SSE2 movq on new Intel cpus } - if (supports_sse4_2() && supports_ht()) { // Newest Intel cpus + if ((supports_sse4_2() && supports_ht()) || supports_avx()) { // Newest Intel cpus if (FLAG_IS_DEFAULT(UseUnalignedLoadStores)) { UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus }