Section 10.1 gives an overview of RSIM_EVENT, the event corresponding to the processors and cache hierarchies. The rest of this chapter focuses on the out-of-order execution engine. The other subsystems handled by RSIM_EVENT are the processor memory unit and the cache hierarchy, and are discussed in Chapters 11 and 13.
The out-of-order execution engine is responsible for bringing instructions into the processor, decoding instructions, renaming registers, issuing instructions to the functional units, executing instructions at the functional units, updating the register file, and graduating instructions from the active list.