Data processing having a variable number of pipeline stages

Details Data processing having a variable number of pipeline stages Data processing having a variable number of pipeline stages

1997-03-28

2000-01-25

Donaghue, Larry D.

Electrical computers and digital processing systems: processing

Processing architecture

Microprocessor or multichip or multimodule processor having...

712 41, 713501, G06F 1500

Patent

active

060187964

ABSTRACT:
A data processor comprises a processing unit which processes an instruction in pipeline stages, the number of which is switchable between n and m, m being a larger number than n. The data processor also comprises a switching unit for switching the number of the pipeline stages of the processing unit between n and m. The switching unit comprises an indicating unit for indicating whether the data processor is in a first operating condition or in a second operating condition, depending either on the frequency of the operation clock provided for the data processor or on the power source voltage supplied to the data processor, and a pipeline control unit for ordering a processing unit to operate in n stages under the first operation condition, and for ordering the processing unit to operate in m stages under the second operating condition.

REFERENCES:
patent: 5014196 (1991-05-01), Hayashi et al.
patent: 5134562 (1992-07-01), Hattori et al.
patent: 5488729 (1996-01-01), Vegesna et al.
patent: 5706459 (1998-01-01), Atsushi
patent: 5734598 (1998-03-01), Abbott et al.
patent: 5778250 (1998-07-01), Dye
"Speedup Mechanisms for the Processor," by M. Kuga et al., Collected Reports for the Information Processing Society, 37.sup.th National Conference, Sep. 12, 1963, pp. 119-120.

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