Confluence analysis and loop fast-forwarding for improving SIMD execution efficiency
US9612811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Jan 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F8/443
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
One embodiment of the present invention sets forth a method for causing thread convergence. The method includes determining that a control flow graph representing a first section of a program includes at least two non-overlapping paths that extend from a first divergent node to a candidate node. The method also includes determining that the first divergent node is not a dominator of the candidate node or that the candidate node is not a post-dominator of the first divergent node. The method further includes identifying an external node and inserting a first instruction configured to cause a predicate variable to be set to true for a first set of threads that is to execute the external node. The method additionally includes inserting into the program a second divergent node configured to cause various threads to execute or not execute a first control flow path associated with the external node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.