Design description between the differential analysis equipment, design description between the differential analysis program and the design description between the differential analysis method

摘要

PROBLEM TO BE SOLVED: To provide an inter-design description difference analysis device, an inter-design description difference analysis program and an inter-design description difference analysis method capable of analyzing the minimum difference between a first instruction string and a second instruction string.SOLUTION: In an inter-design description difference analysis device 1, under a constraint (constraint of instruction coincidence) that when names N, Nare coincident, and operands O, Oin an instruction are coincident, the instructions p, q are coincident, a constraint (constraint of uniqueness guarantee of coincidence) that one instruction p of an intermediate instruction string is coincident with one instruction q of a post-ECO intermediate instruction string and a constraint (constraint of sequence violation) that the instruction q of the post-ECO intermediate instruction string complies with the sequence of the instruction p of the intermediate instruction string, a correspondence relationship between the instructions p, q is specified such that the number of instruction sets in which internal expressions are coincident among the combination of the instructions p, q becomes the maximum. The correspondence relationship specified by applying the above mentioned method is applied to a normalized instruction string 14a and a post-ECO normalized instruction string 14b such that the minimum difference between an intermediate instruction string 15a and a post-ECO intermediate instruction string 15b can be analyzed.