Target branch prediction using a plurality of tables
US7900026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Nov 21, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3848
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for predicting multiple targets for a single branch includes: a branch target buffer that includes a previous next address for an instruction and that receives an indirect instruction address to provide a first branch target prediction; a first branch table for capturing local past target information of an indirect branch in an encoded form; a second branch table which is a correlation table for storing potential branch targets based on a local branch history and which provides a second branch target prediction when the first branch target prediction is not successful; an exclusion predictor for inhibiting updates of inefficient entries; and a multiplexer to select the predicted target as output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.