Processor

摘要

Operator 104 performs a mod2 addition between the MSB of operation data stored in operation data storage section 101 and input data stored in input data storage section 102. Operator 105 performs a mod2 addition between data obtained by shifting the operation data stored in operation data storage section 101 by 1 bit toward the MSB side and coefficients of a generator polynomial stored in generator polynomial storage section 103. Selection section 106 selects either the shift data or the operation result of operator 105 based on the operation result of operator 104 and stores the selected one in operation data storage section 101 as new operation data. This allows the DSP to efficiently process CRC operations with a small hardware investment.