>I was wondering whether there is any efficient way of implementing an
>8-bit by 8-bit divide. My dividend is smaller than the divisor (always).
>Both are positive numbers. The dividend is in the range 0-128 and the
>divisor is in the range 0-256. The only way I know of is to implement it
>as a 16-bit by 8-bit divide. But that takes 192 instructions which is a
>lot for my application.
>
>Does anyone have any better idea how to do it?
>

On Second thought, how about...

Do a look-up table for 256/b and then use the unrolled 8*8 multiply
that should end up better than 50 cycles, ie approx 4x faster than
the 16/8 divide.



Ray Gardiner (DSP Systems) ray@dsp-systems.com http://www.dsp-systems.com
private email to:- ray@netspace.net.au