ack/mach/pdp/libem/ciu.s

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.sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text
.sect .text
.define cuu~
! $Header$
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cuu~:
mov (sp)+,r1
mov (sp)+,r0
sub (sp)+,r0
ble 1f
asr r0
2: clr -(sp)
sob r0,2b
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1: sub r0,sp ! if out of sob loop r0==0
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jmp (r1)