Method and system for determining multiple unused registers...

Details Method and system for determining multiple unused registers... Method and system for determining multiple unused registers...

2011-05-24

2011-05-24

Fennema, Robert (Department: 2183)

Electrical computers and digital processing systems: processing

Dynamic instruction dependency checking, monitoring or...

Scoreboarding, reservation station, or aliasing

Reexamination Certificate

active

07949857

ABSTRACT:
An improved method, device and system are presented for selecting a predetermined number of unused registers in a processor. The method includes partitioning registers in a processor into subsets; searching each subset for an unused register; determining whether every subset includes an unused register; if so, selecting an unused register from each subset; if not, partitioning the registers into new subsets with each subset having a different combination of registers; searching each of the new subsets for an unused register; determining whether each of the new subsets includes an unused register; if so, selecting an unused register from each new subset; and if not, searching each register serially to find the predetermined number of unused registers.

REFERENCES:
patent: 6438740 (2002-08-01), Broder et al.
patent: 6516383 (2003-02-01), Patra et al.
patent: 6961822 (2005-11-01), Rozario et al.
patent: 2002/0078303 (2002-06-01), Rozario et al.

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