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Myrl-saki | povik: I'll be honest: I don't know. For things which are naturally muxfull, it does have better QoR I think. `x[sel]` for example seems to be better. But for everything else, it seems to regress. | 00:13 |
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Myrl-saki | I built things using this: https://gist.github.com/adrianparvino/a58ee7a5d67224507604605d6768b17e | 00:13 |
Myrl-saki | Can I have this reviewed? It's I think much simpler and I don't think there should any be regressions. https://github.com/YosysHQ/yosys/pull/4000 | 00:22 |
Myrl-saki | I encountered this when my ALU would sometimes produce 3 $alu cells. | 00:22 |
Myrl-saki | Hm. | 04:57 |
Myrl-saki | Is Gowin weird in how its MUXs work? I don't see how 100/220/460 works. | 04:59 |
Myrl-saki | Actually I think I understand it a bit better now. A MUX4 needs 3 MUX2s, i.e. 300 cost. | 05:02 |
Myrl-saki | And I guess it's 220, so if it needs a decoder, it becomes 220 + 90 = 310 | 05:11 |
Myrl-saki | Much less weird than say 211? | 05:11 |
Myrl-saki | Hm, I think pmuxtree is not the best thing to try this on. | 05:14 |
Myrl-saki | Seems like pmux2shiftx to techmap has the best results? | 05:20 |
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