Handling move instructions via register renaming or writing to a different physical register using control flags
US10528355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2015 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Jan 21, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/30181
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus has processing circuitry, register rename circuitry and control circuitry which selects one of first and second move handling techniques for handling a move instruction specifying a source logical register and a destination logical register. In the first technique, the register rename circuitry maps the destination logical register of the move to the same physical register as the source logical register. In the second technique, the processing circuitry writes a data value read from a physical register corresponding to the source logical register to a different physical register corresponding to the destination local register. The second technique is selected when the move instruction specifies the same source logical register as one of the source and destination logical registers as an earlier move instruction handled according to the first technique, and the register mapping used for that register when handling the earlier move instruction is still current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.