Hi Jose,

> 
> Why not using define-alu-insn-bin and daib instead of defining an
> additional pair of macros?  We can pass the ISAs as arguments to
> daib/daiu and thus avoid replicating logic ...
> 

Long story short, I tried to do this originally but did it very poorly,
and the result was not readable :)

Revisiting today, I have realized what I was doing wrong. Here is a
revised version of the patch following your suggestion to avoid the
replicated logic.