Method and apparatus for avoiding writeback conflicts between ex

Details Method and apparatus for avoiding writeback conflicts between ex Method and apparatus for avoiding writeback conflicts between ex

1995-08-01

1997-02-18

Amsbury, Wayne

Boots, shoes, and leggings

395800, 395826, 395427, 3642813, 3642818, 3642318, 36494834, 36496426, G06F 938, G06F 1300

Patent

active

056048785

ABSTRACT:
Pipeline lengthening in functional units likely to be involved in a writeback conflict is implemented to avoid conflicts. Logic circuitry is provided for comparing the depths of two concurrently executing execution unit pipelines to determine if a conflict will develop. When it appears that two execution units will attempt to write back at the same time, the execution unit having a shorter pipeline will be instructed to add a stage to its pipeline, storing its result in a delaying buffer for one clock cycle. After the conflict has been resolved, the instruction to lengthen the pipeline of a given functional unit will be rescinded. Multistage execution units are designed to signal a reservation station to delay the dispatch of various instructions to avoid conflicts between execution units.

REFERENCES:
patent: 4875161 (1989-10-01), Lahti
patent: 5067069 (1991-11-01), Fite et al.
patent: 5073855 (1991-12-01), Staplin et al.
patent: 5081575 (1992-01-01), Hiller et al.
patent: 5165038 (1992-11-01), Beard et al.
patent: 5222223 (1993-06-01), Webb Jr. et al.
patent: 5222240 (1993-06-01), Patel
Hennessy & Patterson, Computer Architecture A Quantitative Approach Morgan Kaufmann Publishers, Inc., San Mateo CA pp. 250-349 [1990].

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