How to select a non-blocking load from the load / store buffer and load / store unit to achieve a non-blocking load for a superscalar microprocessor

摘要

Load / store buffer that can store both (57) of the store memory operation and the load SUMMARY memory operation is provided. Memory operations to access the data cache is selected from the load / store buffer, which a memory operation that the order of the program, the memory operation is selected, misses the data cache is stored in the buffer and known including the case in which after. Thus, memory operations other waiting an opportunity to access the data cache and waits for the opportunity to perform a main memory request to the memory operation that can be performed to such access, missed. Memory operations that miss is indicated by Misubitto which is set, a mechanism for selecting a memory operation accessing the data cache, to allow ignore them until they become non-speculative therefore.