Last iteration loop branch prediction upon counter threshold...

Details Last iteration loop branch prediction upon counter threshold... Last iteration loop branch prediction upon counter threshold...

2006-03-07

2006-03-07

Kim, Kenneth S. (Department: 2111)

Electrical computers and digital processing systems: processing

Processing control

Branching

C712S241000

Reexamination Certificate

active

07010676

ABSTRACT:
An embodiment of the invention is a processor for processing loop branch instructions. The processor includes an instruction unit for fetching and decoding instructions including at least one loop branch instruction. A branch prediction unit predicts target instructions to be fetched and decoded by the instruction unit in response to the loop branch instruction. An execution unit executes instructions from the instruction unit and maintains a counter indicating an iteration of a loop. The execution unit includes detection logic for detecting when the counter equals a threshold and notifies the branch prediction unit when the counter equals the threshold.

REFERENCES:
patent: 4764861 (1988-08-01), Shibuya
patent: 5740419 (1998-04-01), Potter
patent: 5805876 (1998-09-01), Bose et al.
patent: 5909573 (1999-06-01), Sheaffer
patent: 6003128 (1999-12-01), Tran
patent: 6098168 (2000-08-01), Eisen et al.
patent: 6438682 (2002-08-01), Morris et al.

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