Andy Warren wrote:

> A couple of people have already posted lookup-table solutions; if,
> for whatever reason, you decide not to use a table, you can save one
> instruction per test by doing this:
>
>     MOVF    COMND           ;Grab the command.
>
>     XORLW   VALUE1          ;Test it against the first value.
>     BZ      ROUTINE1        ;Jump if it matches.
>

ah! you left out the ",w" on the "movf" Andy!

Another non-lookup table method which saves an instruction per
test over Andy W's method, but limits you to only 8 possible
jumps.

        btfsc   COMND,0 ; bitmask to enable routine 1 is
        goto    routine1        ; XXXXXXX1

        btfsc   COMND,1 ; bitmask to enable routine 2 is
        goto    routine2        ; XXXXXX10

...and so on.


- Andy.

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Andrew David, Software Manager, Ultronics Ltd.
Andy@Ultronics.co.uk
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