Control Data Cyber 170 State Hardware Reference Manual page 127

CP Set Instructions
SXi
Xj
+
Bk
14
9 8 6 5 3 2 0
i j k
This i n s t r u c t i o n r e a d s operands from X j and Bk, adds t h e operands, and d e l i v e r s
t h e r e s u l t t o X i . The sum
i s
formed i n
an
18-bit one's complement mode.
The
18-bit r e s u l t i s sign-extended by copying t h e highest-order b i t of t h e r e s u l t
i n t o t h e upper 42 b i t p o s i t i o n s i n X i .
7 4 i jk Set X i t o (Aj)
+
(Bk)
SXi
Aj
+
Bk
This i n s t r u c t i o n r e a d s operands from Aj and Bk, adds t h e operands, and d e l i v e r s
t h e r e s u l t t o X i .
The
sum i s
formed i n an 18-bit one's complement mode. T h e
18-bit r e s u l t i s sign-extended by copying t h e highest-order
b i t of t h e r e s u l t
i n t o t h e upper 42 b i t p o s i t i o n s i n X i .
751 jk S e t X i t o ( A j )
-
(Bk) SXi Aj
-
Bk
This i n s t r u c t i o h reads operands from Aj and Bk, s u b t r a c t s t h e Bk operand from
t h e Aj operand,
and
d e l i v e r s t h e r e s u l t t o X i .
The d i f f e r e n c e i s formed i n a n
18-bit one's complement mode. The 18-bit r e s u l t i s sign-extended by copying
t h e highest-order b i t of t h e r e s u l t i n t o t h e upper 42 b i t p o s i t i o n s i n X i .