Variable length instruction pipeline

Details Variable length instruction pipeline Variable length instruction pipeline

2005-02-22

2005-02-22

Coleman, Eric (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

C712S210000, C712S216000

Reexamination Certificate

active

06859873

ABSTRACT:
A variable length instruction pipeline includes optional expansion stages that can be included in the variable length instruction pipeline to avoid pipeline stalls. The expansion stages are removed from the variable length instruction pipeline when not needed to reduce the length of the pipeline, which reduces latency and other problems associated with long pipelines. For example, in one embodiment of the present invention, a variable length instruction pipeline includes a first pipeline stage, a first expansion stage, and a second pipeline stage. The second pipeline stage is configured to selectively receive instructions from the first pipeline stage or the first expansion stage if the first expansion stage holds an instruction.

REFERENCES:
patent: 5796972 (1998-08-01), Johnson et al.
patent: 5878242 (1999-03-01), Olson et al.
patent: 5937177 (1999-08-01), Molnar et al.
patent: 6157988 (2000-12-01), Dowling
patent: 6272616 (2001-08-01), Fernando et al.

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