Control Data Cyber 170 State Hardware Reference Manual page 38

lnstruction Section
Normal Jump Sequence
The normal jump sequence c o n t r o l s t h e e x e c u t i o n of branch i n s t r u c t i o n s 02
through 07. The 02 i n s t r u c t i o n performs an u n c o n d i t i o n a l jump t o t h e B i
r e g i s t e r a d d r e s s p l u s K. The branch a d d r e s s
i s
K when i e q u a l s 0. The 02
i n s t r u c t i o n i s :
The c o n d i t i o n a l jump i n s t r u c t i o n s 03 through 07 branch t o a d d r e s s K if t h e
jump c o n d i t i o n i s m e t . These i n s t r u c t i o n s a r e :
030 Branch t o K i f ( X j )
=
0 ZR Xj,
K
031 Branch t o
K
i f (Xj) f 0
NZ
X j , K
032 Branch t o
K
i f ( X j ) i s p o s i t i v e
033 Branch t o
K
i f ( X j ) i s n e g a t i v e
PL
X j , K
NG Xj, K
034 Branch t o K
i f ( X j ) i s i n range
I R X j , K
035 Branch t o
K
i f
( X j )
i s o u t of range
OR Xj, K
036 Branch t o K i f ( X j ) i s d e f i n i t e
DF Xj, K
037 Branch t o
K
i f ( X j ) i s i n d e f i n i t e I D X j , K
04 Branch t o K i f ( B i )
=
( B j ) EQ B i , B j , K
05 Branch t o K i f ( B i )
#
( B j )
06 Branch t o K i f ( B i )
-
>
( B j )
NE B i , B j , K
GE
B i ,
Bj,
K
07 Branch t o
K
i f ( B i )
<
( B j ) LT B i , Bj, K
Return Jump Sequence
The r e t u r n jump sequence c o n t r o l s t h e e x e c u t i o n of t h r e e i n s t r u c t i o n s .
00 E r r o r e x i t t o MA o r program s t o p PS
010
Return jump t o K RJ
K
013 C e n t r a l exchange jump t o ( B j )
+
K o r monitor
X J B j i - K
exchange jump t o
MA