LibreSSL V2.6.4.1
LibreSSL V2.6.4.1 supports all the architectures.
This release contains a private code that removes the optimization around BN_rshift() to support ARM64 functionality. This is a workaround added due to a bug in VS 2017 linker that breaks ARM64 functionality.
Once VS 2017 fixes the bug, this workaround will be removed.