| 摘要 |
A second execution unit such as a coprocessor incorporated into a processor is connected such that the direction of its processing flow is opposite to that of the main pipeline processing flow, and executes high-speed multiplication operations and specific operations. Conventionally, the second execution unit has been provided in the same direction as a first execution unit. With this prior art arrangement, the second execution unit is initiated at an early stage of pipeline processing. With the arrangement of this invention, the second execution unit is initiated at a later stage, giving sufficient time before all the operation data are prepared. Thus, it is unnecessary for the apparatus to start subsequent processing until all operation data become available, thereby enhancing processing performance. |
