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1. 发明专利

JPH0423041A DATA PROCESSOR 失效
公开(公告)号：JPH0423041A
公开(公告)日：1992-01-27
申请号：JP12753490
申请日：1990-05-17
申请人： HITACHI LTD
发明人： YAMAGATA MAKOTO , NAKANISHI JUNJI
IPC分类号： G06F9/38
摘要： PURPOSE:To control a pipeline eliminating the need for queue at a high speed with a small quantity of materials by stopping the progress of the instruction processing and its subsequent instruction processing when a queuing factor is produced at a processing stage in an instruction executing period. CONSTITUTION:When a queuing state is produced in an instruction executing period, a memory access request signal 203 is set at 1 in a 2nd cycle of the executing period. Consequently, an action queuing control signal 301 is set at 1, therefore an action control signal 401 serving as the output signal of an action control part 40 is set at 1. Thus the working of a microprogram execution control part 20 is discontinued. At the same time, an instruction control part 10 is also stopped and the state is not changed any further. Thus, the subsequent instructions included in a preparatory period are stopped when the precedent instruction during execution is stopped. Thus the processing is not carried on even if no queue is present between the pipeline elements. Thus, the data are held and a pipeline can be controlled at a high speed with no malfunction.

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