Using a table to track and locate the latest copy of an operand

Details Using a table to track and locate the latest copy of an operand Using a table to track and locate the latest copy of an operand

1997-12-19

2000-07-11

Ellis, Richard L.

Electrical computers and digital processing systems: processing

Dynamic instruction dependency checking, monitoring or...

Commitment control or register bypass

712217, G06F 938

Patent

active

060887907

ABSTRACT:
The invention, in one embodiment, is a table for tracking operand locations in a processor pipeline. The table includes an entry for each one of a plurality of general purpose registers. Each entry further includes an indication of which port last wrote to the corresponding register; an indication of a pipeline stage containing the instruction that last wrote to the corresponding register; and an indication of whether the operand resides in the pipeline or in a register.

REFERENCES:
patent: 4903196 (1990-02-01), Pomerene et al.
patent: 5778248 (1998-07-01), Leung
patent: 5790880 (1998-08-01), Ireton
patent: 5898853 (1999-04-01), Panwar et al.

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