Scott Dattalo and Andy Warren have seen this but I thought it may
be not only of interest of the list but maybe someone has a better
way.  (Andy - note added parentheses)



   ;Subtract two byte literal.
   ;At exit, C = 0 if result is negative

sub_word_literal: macro aaa, lll

   movlw   low (~(lll) + 1)
   addwf   aaa+1, f
   movlw   high ((~(lll) + 1) & h'ffff')
   skpnc
   addlw   1
   skpnc
   skpz
   addwf   aaa, f
   endm

--
Bob Fehrenbach    Wauwatosa, WI     bfehrenb@execpc.com