ack/mach/m68k2/libem/cii.s

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.define .cii
.sect .text
.sect .rom
.sect .data
.sect .bss
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.sect .text
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.cii:
move.l (sp)+,a0 ! return address
move (sp)+,d0 ! destination size
sub (sp)+,d0 ! destination - source size
bgt 1f
sub d0,sp ! pop extra bytes
bra 3f
1:
move (sp),d1
ext.l d1
swap d1
asr #1,d0
2:
move.w d1,-(sp)
sub #1,d0
bgt 2b
3:
jmp (a0)