Apparatus for handling out-of-order exceptions in pipe-lined parallel processing that prevents execution of all instructions behind exception predicted instruction and aborts if exception actually occurs

摘要

A parallel processing control apparatus comprises processing blocks each providing an equal function and incorporating pipeline operation units; a status register for storing statuses of the processing blocks; an instruction feeder for simultaneously allocating instructions to the processing blocks; a flagging unit for setting a flag for a corresponding one of the processing blocks to indicate that at least one instruction fed to another of the processing blocks and positioned, on a sequential model, behind an instruction being processed in the flagged processing block has been processed or passed through a specific stage; a flag holder for holding the flag; and a write controller for selecting a processing block whose status is to be written in the status register.