Obtaining load target operand pre-fetch address from history table information upon incremented number of access indicator threshold
US6275918A · kind A · utility
23Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Mar 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3832
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for improving pre-fetch accuracy in a data processing system utilizing a pre-fetch history table is disclosed. The method compares a portion of an instruction address to an address located as an entry in a pre-fetch history table based on the status of a validity bit contained in the entry. If the validity bit is set and the addresses match, an indicator field within the entry is checked to see if it is equal to or greater than a threshold level. When the indicator field is greater than the threshold level, a target operand address is pre-fetched based on stride and direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.