METHOD FOR CALCULATING INVERSE SQUARE ROOTS

摘要

Subduplicate derivative action method, it is used to implement quickly and improves accuracy to be arranged to carry out one quickly and improve accuracy, selectively loads initial approximation without any operating process from inquiry table to an inquiry table and when an input value is input into inquiry table by being previously calculated/storing an initial approximation. Initial approximation is precalculated and is stored to inquiry table. Initial approximation when the input value storage corresponding with the input value for being selected/loading from inquiry table that is input into inquiry table and when the multiplier for next operation is used as input value. Inquiry table uses 10, the top of an imaginary part of input value as input and address, be value in each address as the initial approximation of an output valve imaginary part and storage/use 12.