git.sur5r.net Git - cc65/blob - libsrc/runtime/lsave.s

   1 ;
   2 ; Ullrich von Bassewitz, 08.08.1998
   3 ;
   4 ; CC65 runtime: save ax into temp storage/restore ax from temp storage
   5 ;
   6
   7         .export         saveeax, resteax
   8         .importzp       sreg, regsave
   9
  10 saveeax:
  11         sta     regsave
  12         stx     regsave+1
  13         lda     sreg
  14         sta     regsave+2
  15         lda     sreg+1
  16         sta     regsave+3
  17         lda     regsave
  18         rts
  19
  20 resteax:
  21         lda     regsave+3
  22         sta     sreg+1
  23         lda     regsave+2
  24         sta     sreg
  25         ldx     regsave+1
  26         lda     regsave
  27         rts
  28