INSTRUCTION EXECUTION CYCLE CONTROL CIRCUIT AND CONTROL METHOD FOR CONTROLLING EXECUTION CYCLE OF INSTRUCTION IN PIPELINE PROCESSING

摘要

An instruction execution cycle control device for controlling an execution cycle of an instruction within a pipeline in pipeline processing, said device comprising a set register for holding execution cycle numbers previously set for every instruction; and an execution cycle control unit receiving an instruction to be executed, obtaining an execution cycle number corresponding to the received instruction, which is held in said execution cycle number holding means, and stopping updating the state of each circuit for use in execution of the instruction, in the processor, according to the obtained execution cycle number, for controlling the execution cycle of the instruction.