Alan King wrote:
>
> Scott Dattalo wrote:
> >
> > Vladimir M. Klochko wrote:
> >
>
>   In all of these responses, I haven't seen anyone mention proper long
> division as being the correct response to "what's the inverse of
> multiply x by x?"

There's a reason it's called long division. Because it takes a
hell of a long time for it to execute without dedicated hardware.
The best general purpose 8-bit division routine that I've seen
is Andy's:

http://www.geocities.com/SiliconValley/2499/answers.html#PIC00064

The stuff that we've been posting the last few weeks are routines that
are highly optimized and consequently faster than the general purpose
one.

Scott