Issuing instructions with unresolved data dependencies
US8627044B2 · kind B2 · utility
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1References
18Claims
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Assignee
Inventors
Key dates
| Filing date | Oct 6, 2010 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Jun 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3858
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The described embodiments include a processor that determines instructions that can be issued based on unresolved data dependencies. In an issue unit in the processor, the processor keeps a record of each instruction that is directly or indirectly dependent on a base instruction. Upon determining that the base instruction has been deferred, the processor monitors instructions that are being issued from an issue queue to an execution unit for execution. Upon determining that an instruction from the record has reached a head of the issue queue, the processor immediately issues the instruction from the issue queue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.