5 ms·

I remember running a fuzzer on yosys and reporting several bugs that popped up years ago, and Clifford was very prompt and responsive fixing them.

swiley 7y ago
As a hobbyist I have to say: Yosis is just so much more pleasant to use than the commercial tools, even if it were horribly buggy I think I would prefer it.
- tverbeure 7y ago
  Is that an apples to apples experience comparison? I use Quartus primarily in a Makefile, just the way I use Yosys and Nextpnr in a Makefile. There really isn’t a whole lot of first order difference. But with Quartus, you get better language support, vastly better timing constraints, and excellent debugging tools. I recently did the test compiling an identical design from RTL to bitstream for both Yosys/Nextpnr and Quartus, and the speed to completion was very close (though the fill percentage for the Lattice part was much higher.) Quartus gets a lot of criticism for its GUI/editor, but that’s a product category in which Yosys doesn’t even play.
  - fit2rule 7y ago
    Yosys seems to me to be quite ripe for a GUI add-on. Its cleanliness and elegance befit the KISS ideology of an OpenSCAD-style IDE.
    - tverbeure 7y ago
      I honestly don’t see why or how? It’s a synthesis tool. RTL goes in, logic elements go out. It doesn’t need a GUI just like Synopsys DC doesn’t need a GUI. If an IDE for RTL design is your thing, you use a generic tool that may or may not have bindings to invoke Yosys from some menu option, just like Eclipse can be used to call GCC.
  - Rochus 7y ago
    See https://github.com/rochus-keller/VerilogCreator/blob/master/README.md https://github.com/rochus-keller/VerilogCreator/blob/master/... for a compatible IDE.
    - tverbeure 7y ago
      That’s a Verilog IDE that can be used with any backend tool...
      - Rochus 7y ago
        It has a built-in configuration for Yosys and some other FOSS tools, but you can also build your own configuration using a scripting language if the backend is not supported yet.

swiley 7y ago

As a hobbyist I have to say: Yosis is just so much more pleasant to use than the commercial tools, even if it were horribly buggy I think I would prefer it.

tverbeure 7y ago
Is that an apples to apples experience comparison? I use Quartus primarily in a Makefile, just the way I use Yosys and Nextpnr in a Makefile. There really isn’t a whole lot of first order difference. But with Quartus, you get better language support, vastly better timing constraints, and excellent debugging tools. I recently did the test compiling an identical design from RTL to bitstream for both Yosys/Nextpnr and Quartus, and the speed to completion was very close (though the fill percentage for the Lattice part was much higher.) Quartus gets a lot of criticism for its GUI/editor, but that’s a product category in which Yosys doesn’t even play.
- fit2rule 7y ago
  Yosys seems to me to be quite ripe for a GUI add-on. Its cleanliness and elegance befit the KISS ideology of an OpenSCAD-style IDE.
  - tverbeure 7y ago
    I honestly don’t see why or how? It’s a synthesis tool. RTL goes in, logic elements go out. It doesn’t need a GUI just like Synopsys DC doesn’t need a GUI. If an IDE for RTL design is your thing, you use a generic tool that may or may not have bindings to invoke Yosys from some menu option, just like Eclipse can be used to call GCC.
- Rochus 7y ago
  See https://github.com/rochus-keller/VerilogCreator/blob/master/README.md https://github.com/rochus-keller/VerilogCreator/blob/master/... for a compatible IDE.
  - tverbeure 7y ago
    That’s a Verilog IDE that can be used with any backend tool...
    - Rochus 7y ago
      It has a built-in configuration for Yosys and some other FOSS tools, but you can also build your own configuration using a scripting language if the backend is not supported yet.