Command data transport to a graphics processing device from a CPU performing write reordering operations
US6088701A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1997 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Nov 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99943
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for enabling a graphics processor to operate with a CPU that reorders write instructions without requiring expensive hardware and which does not significantly reduce the performance of the driver operating on the CPU. The invention allows the graphics processor to evaluate the data sent to it by software running on the CPU in its intended and proper order, even if the CPU transmits the data to the graphics processor in an order different from that generated by the software. The invention works regardless of the particular write reordering technique used by the CPU, and is a very low-cost addition to the graphics processor, requiring only a few registers and a small state machine. The invention identifies the number of "holes" in the reordered write instructions and when the number of holes becomes zero a set of received data is made available for execution by the graphics processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.