Branch prediction based on correlation between sets of bunches o

Details Branch prediction based on correlation between sets of bunches o Branch prediction based on correlation between sets of bunches o

1997-12-24

1999-04-20

Kim, Kenneth S.

395382, 395587, 39580023, G06F 938

Patent

active

058965297

ABSTRACT:
A method for a prediction correlation between a first group of branch instructions in a bunch of instructions and a second group of branch instructions in a bunch of instructions is disclosed. The method includes indicating a direction of a plurality of branch instructions in a bunch of instructions. More particularly, the method includes building an address composed of an instruction fetch address and bits in a history register. The method accesses a bunch of instructions using the fetch address and accesses a prediction bits set from a branch history table using the composed address. The accessed bunch of instructions are processed. Further, the history register and the branch history table are updated to correlate a first group of a branch instructions in the accessed bunch of instructions to a second group of branch instructions in a next group of branch instructions in the bunch of instructions.

REFERENCES:
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patent: 5367703 (1994-11-01), Levitan
patent: 5414822 (1995-05-01), Saito et al.
patent: 5507028 (1996-04-01), Liu
patent: 5553253 (1996-09-01), Pan et al.

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