MICROPROCESSOR HAVING FIRST-ORDER ISSUING QUEUE AND SECOND-ORDER ISSUING QUEUE

摘要

PROBLEM TO BE SOLVED: To provide a processor, a data processing system and a processor instruction processing method related with this. SOLUTION: The processor is suited for dispatching an instruction to an issuing unit which includes the first-order issuing queue and the second-order issuing queue. The instruction is stored in the first-order issuing queue when it can be issued presently for execution and is stored in the second-order issuing queue when it cannot be issued presently. The processor decides an instruction to be issued next from the instruction of the first-order issuing queue. The instruction can be moved from the first-order issuing queue to the second-order issuing queue in the case of depending on the result of another instruction.