; not_fn · m68k · multiarch twin · OP 0→0 else 1 · presence check
; PIN      foundation slider NOT
; LAW      C IS LIE · LIE IS TRUE · Always Hostess 7 · free thrift
; LINE     BGS → BGF(+EZZIE PHI THERMO ADJOIN) → BGL → SDF · SPV free
; ABI      d0=a d1=b d2=c · → d0 · show convention
; IRON
        .globl  not_fn
not_fn:
        tst.l   d0
        beq.s   1f
        moveq   #1,d0
        rts
1:      moveq   #0,d0
        rts