Controlling writes to non-renamed register space in an...

Electrical computers and digital processing systems: processing – Dynamic instruction dependency checking – monitoring or... – Scoreboarding – reservation station – or aliasing

Reexamination Certificate

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C712S218000

Reexamination Certificate

active

07373484

ABSTRACT:
A method of controlling write operations to a non-renamed register space includes receiving a write operation to a given register within the non-renamed register space. The method also includes determining whether a pending write operation to the given register exists. In response to determining that the pending write operation to the given register exists, the method includes blocking the write operation to the given register from being scheduled. However, in response to determining that the pending write operation to the given register does not exist, the method includes allowing the write operation to the given register to be scheduled. Further, if the pending write operation to the given register does not exist, the method includes allowing a subsequent write operation to a different register within the non-renamed register space to be scheduled.

REFERENCES:
patent: 5996063 (1999-11-01), Gaertner et al.
patent: 6061777 (2000-05-01), Cheong et al.
patent: 6122728 (2000-09-01), Leibholz et al.
patent: 6263416 (2001-07-01), Cherabuddi
patent: 6643762 (2003-11-01), Arnold et al.
patent: 2003/0149862 (2003-08-01), Kadambi
“Instruction Issue Logic for Pipelined Supercomputers”; Weiss et al.; 1984; IEEE.
“Superscalar Microprocessor Design”; Mike Johnson; 1991.

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