In article <19971223163252822.AAA2047@COD-CAP-2.WYOMING.COM>, Justin
Crooks <jcrooks@WYOMING.COM> writes
>How about:
>        movf    rmax,W
>        xorwf   r1,F
>        skpz
>        .set flag...
>        xorwf   r1,F
>
>Xor a register twice with same W and, voila, the original data is back.
>
>        I don't see any reason to xor though...
>        Why not just:
>
>        movf    rmax,w
>        subwf   r1,W
>        skpnz
>
>        ???
Errr, cos i didn't think of doing it that way.

BTW, is there any difference in code efficiency by doing it by
subtraction rather than xor?

--
Philip Martin   ----------------------------------------------------------------
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