Parity flag
For example, suppose that a flag with a set bit, and therefore 1 means that the number is even. If the result of the last operation is 26 (11010 in binary), then this flag will be 0 because there is an odd number of bits set. Similarly, for 102 (1100110 in binary log) this flag will be equal to 1 because there are even number of bits set.
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