Instruction issuing device that issues instructions to the appropriate issuer

摘要

An instruction issuing device comprises a plurality of issue controlling circuits which run in parallel, and perform a control for preferentially issuing an instruction to a particular arithmetic unit. An optimum issue controlling circuit is selected according to the empty quantity of instruction slots for each arithmetic unit or a result of learning of the number of previously issued instructions, and an issue destination is determined based on the direction of the selected circuit.