Ed Todd <PICLIST@MITVMA.MIT.EDU> wrote:

> Write some macros, such as:
>
> IFBITON         MACRO           A
> BMV1            SET             A/8
> BMV2            SET             A-(8*BMV1)
>                 BTFSC           BITFLAGS+BMV1,BMV2     ; do
>                         next if bit is set
>                 ENDM
>
>                 IFBITON TWENTIETH
> will generate a BTFSC   BITFLAGS+2,4
>
> I find this very helpful: I don't have to remember which byte a
> particular flag is in, I just need the flag name.

Ed:

This isn't EXACTLY the same thing, but MPASM already supports
single symbols for register/bit combinations:

    #DEFINE  TWENTIETH BITFLAGS3,3
    ....
             BTFSC    TWENTIETH

-Andy

=== Andrew Warren - fastfwd@ix.netcom.com
=== Fast Forward Engineering - Vista, California
===
=== Custodian of the PICLIST Fund -- For more info, see:
=== http://www.geocities.com/SiliconValley/2499/fund.html