ON 20010626@7:57:40 AM at page:
http://piclist.org/techref/microchip/math/add/24b.htm
DAV-MP-E62a David A Cary added 'Code:

;**********
;   For 17C family processors.
; from std.ins.aspic at http://www.embedinc.com/pic
  if fam_17
add24    macro   dest, src, temp
         movfp   src+0, wreg
         addwf   dest+0      ;add byte 0

         movfp   src+1, wreg
         addwfc  dest+1      ;add byte 1

         movfp   src+2, wreg
         addwfc  dest+2      ;add byte 2
         endm
    endif                    ;end of 17C processor case
;

'