| # A few questions about the capabilities of OpenROAD-Flow-Scripts | |
| Tool: OpenROAD-Flow-Scripts | |
| Subcategory: Capability questions | |
| ## Conversation | |
| ### lokki11199 | |
| Hello! I have a few questions about ORFS capabilities. | |
| 1) Does OpenROAD support libraries with CCS driver model? | |
| 2) Is incremental flow supported? | |
| 3) Does OpenSTA in OpenROAD support all sdc commands? | |
| 4) Is SystemVerilog support limited to the constructs that Yosys supports? | |
| 5) Does OpenROAD do only DRC analysis or also DRV and DFM? Of the DFM analysis I have only seen an antenna rule check. | |
| 6) Does OpenROAD provide corner-based optimisation, or it can only show us the characteristics, like wns, for different corners? | |
| 7) Are OCVs supported? | |
| 8) Does OpenROAD support crosstalk delay/noise analysis? | |
| Thank you for your answers! | |
| ### maliberty | |
| > Hello! I have a few questions about ORFS capabilities. | |
| > | |
| > 1. Does OpenROAD support libraries with CCS driver model? | |
| Only NLDM is currently supported but CCS is under development. | |
| > 2. Is incremental flow supported? | |
| That can have a lot of meanings. We do support restarting the flow at a given step. | |
| > 3. Does OpenSTA in OpenROAD support all sdc commands? | |
| Yes afaik but be careful that there are many proprietary commands that are not in SDC. | |
| > 4. Is SystemVerilog support limited to the constructs that Yosys supports? | |
| Yes. The is the surelog plugin that has a good amount of SV support | |
| > 5. Does OpenROAD do only DRC analysis or also DRV and DFM? Of the DFM analysis I have only seen an antenna rule check. | |
| OR does max slew/cap/fanout if that's what you mean by DRV. There is no DFM. | |
| > 6. Does OpenROAD provide corner-based optimisation, or it can only show us the characteristics, like wns, for different corners? | |
| OR can be setup for multi-corner analysis. ORFS doesn't take advantage of that today. | |
| > 7. Are OCVs supported? | |
| Yes but see 6 | |
| > 8. Does OpenROAD support crosstalk delay/noise analysis? | |
| No. Once we have CCS for delay it would be natural to tackle this next. | |
| > | |
| > Thank you for your answers! | |
| ### dralabeing | |
| > @dralabeing. Should we curate this and ask Jack to add it to OR and ORFS FAQs? | |
| Yes, this is a good idea. Let's add this to the FAQs | |