Apparatus and method for storing and initializing branch predict

Details Apparatus and method for storing and initializing branch predict Apparatus and method for storing and initializing branch predict

1995-06-07

1997-07-15

Harrell, Robert B.

G06F 942

Patent

active

056491786

ABSTRACT:
Apparatus for retaining the branch prediction bits of a line displaced from an integrated cache/branch history table and using the retained bits to initialize the prediction bits should that line be brought back into the cache, the operation of which may be overlapped with the activities normally associated with displacing a cache line with one fetched from memory, thus imposing no instruction processing penalty. The apparatus consists of an associative memory that provides storage for branch prediction bits associated with cache lines and comparison means for matching stored prediction bits with their corresponding cache lines.

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patent: 4679141 (1987-07-01), Pomerene et al.
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patent: 5287467 (1994-02-01), Blaner et al.
patent: 5423011 (1995-06-01), Blaner et al.
Johnny K. F. Lee et al., "Branch Prediction Strategies & Branch Target Buffer Design" (Jan. 1984) Computer Magazine pp. 6-22.
Smith "A Study of Branch Prediction Strategies" Control Data Corporation IEEE (1981) pp. 135-148.

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