ack/mach/m68k4/libem/csb.s

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1985-02-07 22:06:32 +00:00
.define .csb
.text
.csb:
movem.l d0/d1/a0/a1,.savreg
move.l (sp)+,a0 ! case descriptor
move.l (sp)+,d0 ! index
move.l (a0)+,a1 ! default jump address
move.l (a0)+,d1 ! # entries
beq 2f
sub.l #1,d1
1:
cmp.l (a0)+,d0
beq 3f
tst.l (a0)+ ! skip jump address
dbf d1,1b
2:
move.l a1,d1 ! default jump address
bne 4f
move.l #ECASE,-(sp)
jmp .fat
3:
move.l (a0)+,a1 ! get jump address
4:
move.l a1,-(sp)
movem.l .savreg,d0/d1/a0/a1
rts
.align 2