Correlating Branches Hypothesis: recent branches are correlated; that is, behavior of recently executed branches affects prediction of current branch Idea: record m most recently executed branches as taken or not taken, and use that pattern to select the proper branch history table In general, (m,n) predictor means record last m branches to select between 2 m history talbes each with n-bit counters –Old 2-bit BHT is then a (0,2) predictor
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