Apparatus and method of modifying hardware description language statements
US5533179A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1994 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Dec 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An Hardware Description Language (HDL) description file (12) is updated without requiring complete re-assignment of all tokens associated with the HDL statements. The design information is maintained as attributes assigned to the tokens (14). The tokens map onto a block diagram (16). As part of an update to the HDL text file (34), the tokens are compared to see which ones if any have changed. The text lines are compared from left-to-right and right-to-left searching for changes in the text file and associated changes in token mapping (36, 38). All tokens inclusive between the left-most change and right-most change is considered to be different. New tokens are assigned and mapped into the block diagram for the HDL elements that change (40). The mapping of old tokens are removed from the block diagram (42). The mappings from token that did not change are maintained (44).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.