(replying to myself...)

On Dec 29, 2007 11:22 PM, Daniel Serpell <daniel.serpell@gmail.com> wrote:
>
> Well, I tried in my superopt and you can do it in one ins less, using:
>
> ; B[012] = A[012] + K[012] , K const.
>
>         movf    A0,W
>         addlw   K0
>         movwf   B0
>
>         clrf    B1,F
>         rlf     B1,W
>         addlw   K1
>         addwf   A1,W
>         iorwf   B1,F
>

Of course, the above does not work if K1 == 255, in that case
you need to replace the middle segment with one of the shorter
versions, like:

        movf    A1,W
        btfss   STATUS,C
        addlw   255
        movwf   B1

I think that a macro with all the cases will be better...

     Daniel.
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