How to use the programming calculator in OS X?

I'm trying to make the best out of the programming calculator in OS X, but I don't know these functions

• byte flip


• word flip


• X<


• X>>Y


• RoL/RoR (are these just sll/srl?)

Also is it possible to perform a two's complement on a narrower range i.e. 16 bits instead of 64 bits?