Tracking long GHV in high performance out-of-order superscalar processors
US9524166B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Jul 23, 2013 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Jun 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3863
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Tracking global history vector in high performance out of order superscalar processors, in one aspect, may comprise providing a shift register storing global history vector that stores branch predictions and outcomes. A counter is maintained to determine a number of bits to shift the shift register to recover branch history. In another aspect, the global history vector may be implemented with a circular buffer structure. Youngest and oldest pointers to the circular buffer are maintained and used in recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.