| 摘要 |
PURPOSE:To quickly perform processing by allocating a field indicating the processing level in a field indicating the interface register number and starting a detecting logic of address conflict or the like at the time of coincidence between contents of the processing level field and the current processing level of a processor. CONSTITUTION:Contents of the processing level field are comported with the current processing level in the processor; and if they do not coincide with each other, the following instruction is executed in the time overlap processing by a pipeline because execution of the following instruction is not affected. If they coincide with each other, the check logic is started because there is probability of address conflict or the like, and the overlap processing is performed by the pipeline if conflict does not occur. Since the following instruction is inhibited from pipeline processing by actions of these deciding logics only when conflict occurs, unnecessary delay of the start of the following instruction is prevented to quickly perform the processing.
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