ack/mach/m68k4/libem/csb.s
1989-02-22 17:18:17 +00:00

31 lines
436 B
ArmAsm

.define .csb
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
.csb:
! case descriptor in a0
! index in d0
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 .fatal
3:
move.l (a0)+,a1 ! get jump address
4:
move.l a1,-(sp)
rts
.align 2