ChanServ changed the topic of #yosys to: Yosys Open SYnthesis Suite: https://github.com/YosysHQ/yosys/ | Channel logs: https://libera.irclog.whitequark.org/yosys/
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<so-offish> Ok everybody: I built an 8:1 mux out of 4 TRELLIS_COMB elements. To do this, I used PFUMX and L6MUX21 components within the TRELLIS_COMB, and wired them up. It works in simulation - but BREAKS THE PLACER (unable to find legal placement for 'COMB3'). Can someone tell me which TRELLIS_COMB cells can use the IS_Z1=1'b1? I think that's the issue with that block - which TRELLIS_COMB has the L6MUX21?
<so-offish> Actually I'm not even sure that's the issue, but that's the only block where I used IS_Z1=1'b1 so I think that's it
<so-offish> I just need the tightest mux I can with the ability to move it around programmatically with placement constraints. The PFUMX and the L6MUX21 look like components which are generated by Yosys, but then the packer finds a place for them within a TRELLIS_COMB. I guess I should look at the code for the packer to figure out what I did wrong...
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