Duplicate detection for register renaming
US11640301B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2022 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Apr 4, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are disclosed for duplicate detection for register renaming. For example, a method includes checking a map table for duplicates of a first physical register, wherein the map table stores entries that each map an architectural register of an instruction set architecture to a physical register of a microarchitecture and a duplicate is two or more architectural registers that are mapped to a same physical register; and, responsive to a duplicate of the first physical register in the map table, preventing the first physical register from being added to a free list upon retirement of an instruction that renames an architectural register that was previously mapped to the first physical register to a different physical register, wherein the free list stores entries that indicate which physical registers are available for renaming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.