Spectre fixes with predictor mode tag
US11783050B2 · kind B2 · utility
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2References
16Claims
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Key dates
| Filing date | Nov 13, 2020 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Jul 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q30/0185
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a method implemented in a microprocessor, including receiving a fetched branch instruction; performing a privilege level test on a fetched branch instruction using a privilege level indicated by a first tag corresponding to a privilege level in a branch prediction table comprising plural entries, each of the plural entries comprising a tag corresponding to a privilege level; and providing a prediction branch miss for the fetched branch instruction based on a failure of the privilege level test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.