Method and apparatus for reducing wrong path execution in a speculative multi-threaded processor

摘要

A method and apparatus for reducing wrong path execution in a speculative multi-threaded processor is disclosed. In one embodiment, a wrong path predictor may be used to enhance the selection of the right path at a branch point. In one embodiment, the wrong path predictor may include a speculative processor to produce a speculative processor execution outcome, and a branch corrector to determine whether to trust the speculative processor execution outcome. The branch corrector may be used to choose between using the speculative execution, or, instead, overriding the speculative execution with the non-speculative branch prediction.