Processor that eliminates mis-steering instruction fetch...

Details Processor that eliminates mis-steering instruction fetch... Processor that eliminates mis-steering instruction fetch...

2006-07-11

2006-07-11

Tsai, Henry W. H. (Department: 2181)

Electrical computers and digital processing systems: processing

Processing control

Branching

C712S233000

Reexamination Certificate

active

07076640

ABSTRACT:
A processor avoids or eliminates repetitive replay conditions and frequent instruction resteering through various techniques including resteering the fetch after the branch instruction retires, and delaying branch resolution. A processor resolves conditional branches and avoids repetitive resteering by delaying branch resolution. The processor has an instruction pipeline with inserted delay in branch condition and replay control pathways. For example, an instruction sequence that includes a load instruction followed by a subtract instruction then a conditional branch, delays branch resolution to allow time for analysis to determine whether the condition branch has resolved correctly. Eliminating incorrect branch resolutions prevents flushing of correctly predicted branches.

REFERENCES:
patent: 5519841 (1996-05-01), Sager et al.
patent: 5765037 (1998-06-01), Morrison et al.
patent: 5838988 (1998-11-01), Panwar et al.
patent: 5850533 (1998-12-01), Panwar et al.
patent: 5898853 (1999-04-01), Panwar et al.
patent: 5958047 (1999-09-01), Panwar et al.
patent: 5987594 (1999-11-01), Panwar et al.
patent: 6052775 (2000-04-01), Panwar et al.
patent: 6058472 (2000-05-01), Panwar et al.
patent: 6085305 (2000-07-01), Panwar et al.
patent: 6219778 (2001-04-01), Panwar et al.
patent: 6226713 (2001-05-01), Mehrotra
patent: 6240502 (2001-05-01), Panwar et al.
patent: 6269426 (2001-07-01), Hetherington et al.
patent: 6272623 (2001-08-01), Talcott
patent: 2003/0126405 (2003-07-01), Sager et al.
patent: 2003/0126406 (2003-07-01), Hammarlund et al.
patent: WO 02/03200 (2002-01-01), None
U.S. Appl. No. 60/355,464.
Copy of International Search Report as mailed from the EPO on Aug. 12, 2003, for International Application No. PCT/US03/03187, 6 pages.

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