With the recent change of comparison primops to return Int# instead of Bool, the 64 bit operations were also changed, to return Int64# or Word64#:

https://github.com/jstolarek/packages-ghc-prim/commit/07920f03d76dbaec64e3829404d332af22d744fe

It seems a bit wasteful to me to return a value bigger than a machine word for just a boolean. Changing the type to Int# would make the same optimizations possible as for the native-sized primops (though for me personally Bool would be even better since they map to JavaScript bools in GHCJS).

thoughts?

luite