| 摘要 |
PURPOSE:To reduce the hardware by executing the operand data via a high- degree pipeline process and controlling a delay type additional executing process vis an instruction re-executing function and chiefly based on a microprogram. CONSTITUTION:When the operand data on a floating point arithmetic instruction to be executed is supplied, a floating point computing element 8 is immediately started without carrying out the pre-process for detection of a delay type additional executing process. While this executing process is detected by a microprogram, for example, in parallel with execution of the element 8. In this case, an arithmetic control part 3 produces an instruction re-executing request interruption to an instruction control part 1. Thus the part 1 cnacels the subsequent instructions and carries out only the instruction that requested an instruction re-executing request instruction. |
