Re: [f-cpu] DivMod unit

[Yann Guidon <whygee@f-cpu.org>]

hi,

nicO wrote:
> Cedric BAIL a écrit :
> <...>
> > A+
> >   Cedric
> >
> > PS: I will finalise the divide unit during the next week. So if you have
> >   some idee to accelerate the soustraction, it will be a good idea to say
> >   them ;-)
> 
> Soustraction are the same as adder so there is the same type of
> algorithme.

As noted before, there are a few boolean optimisations to do on a
classical adder : tying the carry in to 1 can be propagated in the
equations, as well as the negation of the input.

As i also wrote, there is a very interesting document about
arithmetic operators at
http://www.iis.ee.ethz.ch/~zimmi/publications/comp_arith_notes.ps.gz
(thank you michael !)

WHYGEE
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