On Sun, 18 Nov 2001, Ian Chapman wrote:

> Gerhard Fiedler <gfiedler@GLOBO.COM.BR> wrote:
> >  movf c1, w
> >  subwf c0, w ; c0 - c1 -> w
> >  andlw 80
> >  btfsc status, zero
> >    goto c0_gte_c1; (c0 - c1) >= 0
> >  goto c0_lt_c1; (c0 - c1) < 0
>
> Maybe I'm missing something here, but it seems to me that this approach
> only works correctly for the cases where |c0-c1| < 128 (perhaps this is
> Gerhard's point about overflow not being taken into account).

I hate it when that happens. My 4 instruction snippet fails miserably for
this case too. I've tried many variations, but so far it looks like the 6
instruction sequence (of adding the 0x80 offset to c0 and c1) is the only
one that works. There's gotta be an esthetic solution...

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