| 摘要 |
PROBLEM TO BE SOLVED: To delay the start of a processing in a sub-route and to progress the pipeline processing of a main route for the portion of it by permitting the processing of the sub-route to be a reverse direction. SOLUTION: A second arithmetic part 110 executing a specified operation such as a high-speed multiplication, etc., is connected in the direction being opposite to the flow of the pipeline processing. Since the second arithmetic part 110 is conventionally juxtaposed at a side of the first arithmetic part 106, starting is executed in the early stage of the pipeline processing. But starting can be executed in the succeeding stage so that the preparation, etc., of arithmetic object data is made to be possible for the period. Therefore, a cycle for waiting till data is completed is not required and processing performance is improved. |
