ARITHMETIC PROGRAM, ARITHMETIC UNIT, AND ARITHMETIC METHOD

摘要

PROBLEM TO BE SOLVED: To accelerate subtraction processing of data in which a different value range may be taken depending on a digit position.SOLUTION: An arithmetic unit 100 compares size of value to be subtracted data 110 and subtraction value data 120 in the unit of byte. The arithmetic unit 100 adds carried-down value data 131-138 determined by digit information on data 111-118 according to the comparison result, to the data 111-118 respectively. The arithmetic unit 100 respectively subtracts data 121-128 from the data 111-118 in which the carried-down value data 131-138 are added corresponding to the digit position.