I'm trying to get systemverilog support working, which involves using `uhdm-yosys instead of `yosys`...

Sean Cross

04/10/2023, 7:46 AM

I'm trying to get systemverilog support working, which involves using `uhdm-yosys instead of

yosys

. However, when I run

flow.tcl

it gives me an error of

invalid command name: "read_systemverilog"

. What's the right way to get it working?` `I'm setting the binary to

uhdm-yosys

using

"SYNTH_BIN": "uhdm-yosys",

, and I'm specifying my own version of

synth.tcl

Vijayan Krishnan

04/10/2023, 8:01 AM

To get core team support, start your discussion here: https://github.com/The-OpenROAD-Project/OpenLane/discussions. Otherway you can pass your netlist directly to OpenLane flow as blackbox to skip yosys based synthesis in the flow.

Sean Cross

04/10/2023, 8:02 AM

Thanks, I'll ask questions there.

Ilya Lapshin

04/26/2023, 2:01 PM

@Sean Cross Did you find a solution?

Sean Cross

04/26/2023, 2:03 PM

I did! I'm working through a demo here: https://github.com/xobs/gf180mcu-cpu-pizza/blob/707e3cbfe7c555fbdc0879c8497f5754205e38a2/j22/synth.tcl#L221-L229

Sean Cross

04/26/2023, 2:04 PM

yosys -import

creates TCL aliases for every possible Yosys command. I could change it to run

yosys read_systemverilog ...

instead of running

yosys -import

Sean Cross

04/26/2023, 2:05 PM

Note that there is an outstanding issue to remove

yosys-uhdm

from conda-hdl in favour of just adding the plugin to

yosys, but that hasn't been completed yet.

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