System and method of correcting a branch misprediction
US7152155B2 · kind B2 · utility
17Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Jul 24, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3861
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When a branch misprediction in a pipelined processor is discovered, if the mispredicted branch instruction is not the last uncommitted instruction in the pipelines, older uncommitted instructions are checked for dependency on a long latency operation. If one is discovered, all uncommitted instructions are flushed from the pipelines without waiting for the dependency to be resolved. The branch prediction is corrected, and the branch instruction and all flushed instructions older than the branch instruction are re-fetched and executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.