COMMUNICATION PROTOCOL PROCESSING METHOD AND PROCESSOR

PROBLEM TO BE SOLVED: To provide a processing method and a processor which fast execute similar processing without reading a parameter from other memory inside and outside a device at the time of performing processing that accompanies state transition when a communication protocol is processed. SOLUTION: This device retrieves associative memory 12 that holds a current state number 61 of a protocol, a state transition condition 62, the next state 63 of the protocol, a start instruction 64 of processing that accompanies a state transition and a parameter 65 which is needed for processing from the number 61 of the protocol and the condition 62. When the memory 12 is hit, the number 63, the instruction 64 and at the same time, the parameter 65 are read from the memory 12, and an executing circuit performs necessary operations based on it and repeats the operations.