Method for tracking pipeline resources in a superscalar processo

Details Method for tracking pipeline resources in a superscalar processo Method for tracking pipeline resources in a superscalar processo

1997-06-25

1999-01-12

Coleman, Eric

395674, G06F 938

Patent

active

058600183

ABSTRACT:
A method and apparatus for tracking pipeline resources of a processor involves fetching selected ones of the coded instructions and marking the fetched instructions with instruction metadata. The instruction metadata indicates a number of pipeline resources required by each instruction. The marked instructions are issued from the fetch unit and, using the instruction metadata, a count of a number of resources committed to issued instructions in the execution pipelines is maintained. When it is determined that the number of resources committed to issued instructions exceeds a preselected maximum and instructions are prevented from issuing from the fetch unit. As each instruction is retired, the instruction metadata is used to determine a number of resources released by retirement of the issued instruction.

REFERENCES:
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patent: 5625837 (1997-04-01), Popescu et al.
patent: 5628021 (1997-05-01), Iadonato
patent: 5809268 (1998-09-01), Chan

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