Pipelined system includes correction mechanism operated on history information identifying conditional jump instructions for which the jump prediction was incorrect on previous instances of execution of those instructions
US5121473A · kind A · utility
15Cited by
19References
5Claims
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Key dates
| Filing date | Feb 2, 1990 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Feb 2, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3846
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A jump prediction circuit predicts the outcome of a conditional jump instruction and is of particular use in a pipelined processor. An initial guess is formed, based on the value of the jump parameter in the instruction. A random-access memory stores the history of the outcome of previously executed jump instructions and is used, when valid, to correct the initial guess to produce a final jump prediction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.