ACCUMULATING ADDITION-SUBTRACTION CIRCUIT FOR ABSOLUTE VALUE

摘要

PROBLEM TO BE SOLVED: To provide an accumulating addition-subtraction circuit for the absolute value capable of executing accumulating addition-subtraction for the absolute value at a high speed on a small scale circuit. SOLUTION: The accumulating addition-subtraction circuit for the absolute value is provided with an adder-subtracter performing addition-subtraction of two data that are expressed by a complement of 2, a control unit of an adder-subtracter generating a control signal that controls selection whether aforementioned two data are to be added or subtracted and outputting to the adder-subtracter, and a register housing calculated result of the adder-subtracter and also supplying to the adder-subtracter.