DEVICE AND METHOD FOR DECODING

摘要

PROBLEM TO BE SOLVED: To provide a decoding device which is simple and good in power efficiency and supplies a decoding output to an execution device accurately according to an instruction mode of a computer. SOLUTION: The decoding device 20 is equipped with 1st and 2nd decoders 50 and 52, and 54 and 56 which are so connected as to receive bit arrays of 1st and 2nd specific lengths. The 1st and 2nd decoders operate in parallel so as to generate respective outputs. Switches MUX6 and MUX7 select one of the outputs according to an instruction mode of a processor. The instruction mode of this processor affects the length of the bit array which needs to actually be decoded.