Prediction and avoidance of operand store compare hazard in out-of-order type microprocessor

摘要

Topic Manner and information processing system the load and the STAX operation which are run with out of order mode are managed are offered.Solutions Manner and information processing system, manage the load and the STAX instruction which are run with out of order mode. Inside loading instruction and STAX instruction one is run at least. You can do the judgment that you encountered to operand STAX relative hazard. On the basis of this judgment, entry inside the operand STAX relative hazard forecasting table is created. This entry includes with the instruction address of the instruction which at least, was run and the hazard indicatory flag which it is related with instruction. The hazard indicatory flag shows the fact that instruction encounters to operand STAX relative hazard. Loading instruction as for the hazard indicatory flag and the association and others re ru and loading instruction, reaches the point where it depends on all STAX instructions which it is related with the flag which resembles substantially. Choice figure Drawing 4