Hi,

I'm trying to improve my PIC based revcounter (used for machine tool
velocity monitoring). I am using generic fixed point  routines to
perform the  necessary arithmetic (ex microchip application note). Many
of the calculations involve multiplying/dividing by constants and it
would seem speed improvements could be made by using specific
shift/add/subtract operations instead. Could anybody give me a few
pointers on this type of binary arithmetic.

Kind Regards,

Andy :)
--
Andrew Hall