Apparatus for initializing branch prediction information

Details Apparatus for initializing branch prediction information Apparatus for initializing branch prediction information

1992-06-11

1995-06-06

Harrell, Robert B.

Boots, shoes, and leggings

364DIG1, 364DIG2, 364243, 3642434, 36424341, 36424342, 3642613, 364268, 3642683, 3642685, G06F 940

Patent

active

054230110

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.

REFERENCES:
patent: 5163140 (1992-11-01), Stiles et al.
Jan. 1984 article in Computer Magazine by Johnny K. F. Lee et al., entitled "Branch Prediction Strategies & Branch Target Buffer Design", pp. 6-22.
"A Study of Branch Predition Strategies"; James E. Smith; Control Data Corporation; 1981 IEEE; pp. 135-148.

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