RE: [MiNT] C bit: modulo and divu.w

["Pieter v.d. Meer" <pmeer@abz.nl>]

To clear things up a bit:

1) divu.w is an instruction that divides a LONG and NOT A WORD. This results
in a quotient and a restvalue, which must both be words.
2) divu.w can only correctly divide longs when quotient < 65536!!!!

It CAN for instance divide 100000 by 5 cos the quotient is < 65536

but our counter in this example is a longword...

anyway.. I would recode the original code:

/* snip */

uptime++;
uptimetick += 200;
if (uptime % 5) return;

/* snip */

to this:

/* snip */

uptimetick+=200;
if (uptimetick++ == 5)
{
	uptimetick = 0;
	return;
}

/* snip */

which ofcourse gets rid of the costly modulo operation alltoghether.

okay.. maybe I should stop writing now =)

Mail you later

Pieter van der Meer