Stream based branch prediction index accelerator for multiple stream exits
US10423420B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2017 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Mar 1, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3848
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method for predicting a taken branch that ends an instruction stream in a pipelined high frequency microprocessor includes receiving, by a processor, a first instruction within a first instruction stream, the first instruction comprising a first instruction address; searching, by the processor, an index accelerator predictor one time for the stream; determining, by the processor, a prediction for a taken branch ending the branch stream; influencing, by the processor, a metadata prediction engine based on the prediction; observing a plurality of taken branches from the exit accelerator predictor; maintaining frequency information based on the observed taken branches; determining, based on the frequency information, an updated prediction of the observed plurality of taken branches; and updating, by the processor, the index accelerator predictor with the the updated prediction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.