APPARATUS AND METHOD FOR RESTORING PAGE MISSING DISTURBANCE FOR VECTOR DATA PROCESSING COMPUTATION

摘要

PURPOSE: To complete a vector arithmetic instruction in process by generating a detection signal when a vector load or vector store instruction refers to a data element which is not present in a main memory device. CONSTITUTION: When a vector exception signal (page fault signal, etc.) is generated, a sending-out device 22 of a central processor is stopped from generating an instruction and an instruction which is currently executed is avowed to continue until it is completed. After all instructions are completed, information for discriminating a virtual memory problem that one or plural vector instructions encounter is stored in a kernel stack. This information is sufficient to ascertain the problem of a virtual memory. In case of a page fault, an absent page is transferred into the main memory device 15, the instruction having caused the page fault is reexecuted, and the program execution by a next instruction is carried on. The next instruction may not be always an instruction following the vector instruction including the page fault.