Control Data Cyber 170 State Hardware Reference Manual page 96

CP Logical Instructions
Logical Difference
13i
j k
Logical difference of (Xj) and
(Xk) to Xi
This instruction reads operands from two X registers, operates on them to form
a result, and delivers this result to a third X register. The operands for
this instruction are in Xj and Xk. The result delivered to Xi is the
bit-by-bit logical difference of the two operands. Each of the 60 bits in Xj
is compared with the corresponding bit in Xk to form a single bit in Xi.
A
sample computation is listed in octal notation to illustrate the operation
performed and includes the four possible bit combinations that may occur.
(Xi)
=
0000 3210 7654 7777 0110
This instruction compares bit patterns or complements bit patterns during data
processing.
17i jk Logical difference of ( X j ) with
complement of (Xk) to Xi
BXi -Xk
-
X
j
This instruction reads operands from two X registers, operates on them to form
a result, and delivers this result to a thlrd X register. The operands for
this instruction are in Xj and Xk. The result delivered to Xi is the bit-by-
bit logical difference of the value in Xj and the complement of the value in
Xk. Each of the 60 bits in Xj is compared with the corresponding bit in Xk to
form a single bit in Xi.
A
sample computation is listed in octal notation to
illustrate the operation performed and includes the four possible combinations
that
may
occur.
This instruction compares bit patterns or complements bit patterns during data
processing.