The EXCLUSIVE OR of the first and second operands is placed in the first-operand location.
Operands are treated as unstructured logical quantities, and the connective EXCLUSIVE OR is applied bit by bit. A bit position in the result is set to one if the corresponding bit positions in the two operands are unlike ; otherwise , the result bit is set to zero.
Resulting Condition Code:
0 ~ Result is zero
1 ~ Result not zero
2 ~ -
3 ~ -
Program Exceptions:
Access (fetch, operand 2, X ; fetch and store, operand 1, XI
)
Programming Note
The instruction EXCLUSIVE OR may be used to invert a bit, an operation
particularly useful in testing and setting programmed binary bit
switches.
A field EXCLUSIVE-ORed with itself becomes all zeros.
The sequence A EXCLUSIVE-ORed B, B EXCLUSIVE-ORed A, A EXCLUSIVE-ORed B results in the exchange of the contents of A and B without the use of an auxiliary buffer area.
The immediate byte's position in the operand
is reversed. Given a word-aligned address D,
bytes will be accessed as follows:
\begin{tabular}{ll}
Address Bits
D D(31:24)
D+1 D(23:16)
D+2 D(15:8)
D+3 D(7:0)