Thanks,
I'll check this out.
~d
On Thursday 12 December 2002 11:45, David Brown wrote:
> > > not possible to optomise the 7 "rla" instructions as a "swapb" then an
> > > "rra" ?
> >
> > You'll loose 1 bit then. I thought about it...
>
> I see what you mean. But what about the sequence:
> rrc r
> rlc.b r
> swap
> rrc r
>
> If we start with r = [xxxxxxxA][BCDEFGHI], this gives:
> rrc r: [xxxxxxxx][ABCDEFGH], carry = I
> rlc.b r: [00000000][BCDEFGHI], carry = A
> swap: [BCDEFGHI][00000000], carry = A
> rrc r: [ABCDEFGH][I0000000], carry = 0
>
>
> mvh.
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