Past-history filtered branch prediction

Details Past-history filtered branch prediction Past-history filtered branch prediction

1996-06-05

1998-10-27

Eng, David Y.

G06F 940

Patent

active

058288740

ABSTRACT:
A branch prediction apparatus includes a predicted past history device, and a a branch prediction device. The predicted past history device is operable to receive an indication of a branch instruction and to output a pattern of past predictions of branch directions for the indicated branch instruction. The pattern of past predictions includes at least one prediction of a branch direction for which the correctness of the prediction has not been determined The branch prediction device is operable to receive the pattern of past predictions of branch directions for the indicated branch instruction and to output a predicted branch direction for the indicated branch instruction based on the received pattern of past predictions.

REFERENCES:
patent: 4370711 (1983-01-01), Smith
patent: 5394529 (1995-02-01), Brown, III et al.
patent: 5553253 (1996-09-01), Pan et al.
Alternative Implementations of Two-Level Adaptive Branch Prediction, Yeh, et al. The 19.sup.th Annual Symposium on Computer Architecture, May 1992.

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