Register adjustment based on adjustment values determined at...

Details Register adjustment based on adjustment values determined at... Register adjustment based on adjustment values determined at...

2005-07-19

2005-07-19

Chan, Eddie (Department: 2183)

Electrical computers and digital processing systems: processing

Dynamic instruction dependency checking, monitoring or...

Commitment control or register bypass

C712S219000, C712S241000

Reexamination Certificate

active

06920547

ABSTRACT:
Register adjustment is performed based on adjustment values determined at multiple stages within a pipeline of a processor. In one embodiment, a programmable processor is adapted to include a speculative count register. The speculative count register may be loaded with data associated with an instruction before the instruction commits. However, if the instruction is terminated before it commits, the speculative count register may be adjusted. A set of counters may monitor the difference between the speculative count register and its architectural counterpart.

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“Count tag/shadow” IBM Technical Disclosure Bulletin, vol. 13, No. 4B, Apr. 1, 1994, p. 121.

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