SYSTEMS AND METHODS FOR LOAD CANCELING IN A PROCESSOR THAT IS CONNECTED TO AN EXTERNAL INTERCONNECT FABRIC

摘要

Systems and methods for load canceling in a processor that is connected to an external interconnect fabric are disclosed. As a part of a method for load canceling in a processor that is connected to an external bus, and responsive to a flush request and a corresponding cancellation of pending speculative loads from a load queue, a type of one or more of the pending speculative loads that are positioned in the instruction pipeline external to the processor, is converted from load to prefetch. Data corresponding to one or more of the pending speculative loads that are positioned in the instruction pipeline external to the processor is accessed and returned to cache as prefetch data. The prefetch data is retired in a cache location of the processor.

主权项

1. A method of load canceling in a processor that is coupled to an external interconnect fabric, the method comprising:
converting an action type of one or more of pending speculative loads, that are executing in an instruction pipeline external to said processor from load to prefetch; accessing data corresponding to said one or more of said pending speculative loads that are executing in said instruction pipeline external to said processor; and placing said data in a cache location.