Branch prediction circuits and methods and systems using the...

Electrical computers and digital processing systems: processing – Processing control – Branching

Reexamination Certificate

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C712S239000

Reexamination Certificate

active

07000096

ABSTRACT:
A method of generating a Global History Vector includes the steps of determining if a selected group of instructions contains a branch instruction. A current Global History Vector is maintained in a shift register when the selected group does not contain a branch instruction. A first value is shifted into the shift register to generate a second vector if the selected group contains a branch instruction which is predicted to be a branch taken. A second value is shifted into the shift register to generate a second vector when the selected group contains a branch instruction and the selected group does not include a branch instruction predicted to be a branch taken.

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