Improve performance by ensuring SMIs are passed through to lwu/lhu etc. Avoid duplicate >>>0 for a couple of mem handlers
Improve performance by ensuring SMIs are passed through to lwu/lhu etc. Avoid duplicate >>>0 for a couple of mem handlers

hulkholden/n64js,matthewbauer/n64js,beni55/n64js,beni55/n64js,matthewbauer/n64js,hulkholden/n64js