Control Data Cyber 170 State Hardware Reference Manual page 126

CP
Set
Instructions
Set Xi
70i j K Set X i t o (Aj)
+
K SXI A j
+
K
This two-parcel i n s t r u c t i o n uses t h e lower-order 18 b i t s as operand K. This
i n s t r u c t i o n r e a d s a n operand from Aj, forms t h e sum of t h e operand p l u s K, and
d e l i v e r s the 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
the 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 1 i j K Set X i t o
(Bj)
+
K
SXi Bj
+
K
This two-parcel i n s t r u c t i o n u s e s t h e lower-order 18 b i t s a s operand K. This
i n s t r u c t i o n reads an operand from Bj, forms t h e sum of
t h e operand p l u s K, 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 .
72i jK S e t X i t o (Xj)
+
K SXi X j
+
K
This two-parcel i n s t r u c t i o n u s e s t h e lower-order 18 b i t s a s operand K. T h i s
i n s t r u c t i o n reads a n operand from Xj, forms t h e sum of t h e operand p l u s K, 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 o n e ' 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
the 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 .