Determining register availability for register renaming
US7624253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2006 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Apr 17, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3863
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing apparatus 2 supports out-of-order processing register renaming using a renaming stage 8. A set of physical registers 16 is mapped to architectural registers. Available-register identifying logic 26 is used to identify which physical registers 16 are available for use by the renaming stage 8. The available-register identifying logic 26 includes an instruction FIFO 28 storing register mapping data for unresolved instructions and indicating physical registers 16 storing data values which may be required in association with those unresolved speculative instructions. The speculative instructions may be predicted branch instructions, load/store instructions, conditional instructions or other types of instruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.