Data processing apparatus and method employing collision detection and prediction
US4760519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3867
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing system for processing a sequence of program instructions has a pipeline structure including an instruction pipeline and an execution pipeline. Each pipeline has a plurality of serially operating stages. The stages read from and modify memory at various stages of instruction processing. Collisions between data read from a register in the instruction pipeline phase of operation in response to a first instruction and write data written into the register during the execution phase of operation in response to an earlier instruction can be detected and predicted. In response thereto, the new data can be substituted directly for the modified data in the pipeline itself to provide continued valid operation. In addition, the apparatus and method provide for altering the flow of the instructions through the pipeline in order to accommodate newly generated data and to avoid invalid operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.