EARLY RESTEERING OF MISPREDICTED BRANCHES

Abstract: techniques for early resteering of a branch misprediction are described. examples detailed herein use a virtual run-ahead mechanism in the core. on a branch misprediction for an hard-to-predict (h2p) branch, a subset of the backslice of the h2p branch are replayed from the out-of-order engine directly (while the main thread is flushing and restarting execution from the front-end).

Inventor(s): Aniket Deshmukh, Sufiyan Syed, Jayesh Gaur, Sreenivas Subramoney

CPC Classification: G06F9/3863 ({using multiple copies of the architectural state, e.g. shadow registers})

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