The absolute value of the second operand is placed in the first-operand location. The operation includes complementation of negative numbers; positive numbers remain unchanged. An overflow condition occurs when the maximum negative number is complemented; the number remains unchanged. The overflow causes a program interruption when the fixed-point overflow mask bit is one.
Resulting Condition Code:
0 ~ Result is zero
1 ~ -
2 ~ Result is greater than zero
3 ~ Overflow
Program Exceptions
Fixed-Point Overflow