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