Conditional Instructions Prediction

A processor may include a bias prediction circuit and an instruction prediction circuit to provide respective predictions for a conditional instruction. The bias prediction circuit may provide a bias prediction whether a condition of the conditional instruction is biased true or biased false. The in...

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Bibliographische Detailangaben
Hauptverfasser: Kountanis, Ian D, Choudhary, Niket K, Jia, Haoyan, Vuyyuru, Pruthivi, Lien, Wei-Han, Schuchman, Ethan R, Kothari, Kulin N, Holman, Douglas C
Format: Patent
Sprache:eng
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Zusammenfassung:A processor may include a bias prediction circuit and an instruction prediction circuit to provide respective predictions for a conditional instruction. The bias prediction circuit may provide a bias prediction whether a condition of the conditional instruction is biased true or biased false. The instruction prediction circuit may provide an instruction prediction whether the condition of the conditional instruction is true of false. Responsive to a bias prediction that the condition of the conditional instruction is biased true or biased false, the processor may use the bias prediction from the bias prediction circuit to speculatively process the conditional instruction. Otherwise, the processor may use the instruction prediction from the instruction prediction circuit to speculatively process the conditional instruction.