Method and apparatus for providing operand feed forward support in a data processing system
US6145097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1997 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Sep 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3826
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates in general to a data processing system (10), and more particularly to a method and apparatus for providing operand feed forward support in a data processing system (10). In one embodiment, a scan chain (100) may be combined with a feed forward source Y (FFY) bit (64) to allow a user to update registers (50) and memory (18) during emulation and debug. In one embodiment, feed forward control circuitry (60) forces the content of the WBBR register (70) to be used as the Y source operand value for the first instruction to be executed following an update of scan chain (100). This allows debug module (14) to update processor registers (50) and/or memory (18) by initializing the WBBR register (70) with the desired value, asserting the FFY bit (64), and executing a processor (12) move instruction to the desired register in registers (50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.