whitequark changed the topic of #yosys to: Yosys Open SYnthesis Suite: https://github.com/YosysHQ/yosys/ | Channel logs: https://libera.irclog.whitequark.org/yosys/ | Bridged to #yosys:matrix.org
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<famubu[m]> Yeah I was mistaken.
<famubu[m]> Yosys log shows the number of FFs changing.
<famubu[m]> DFFCE value increases as design size increases.
<famubu[m]> But the utilization report generated by nextpnr doesn't show a register count.
<famubu[m]> Instead it only mentions LUT count.
<famubu[m]> Does that mean LUTs are used for making registers?
<famubu[m]> This is the relevant part from yosys log: https://bpa.st/RY6A
<tpb> Title: View paste RY6A (at bpa.st)
<famubu[m]> And this is the utilization report from nextpnr: https://bpa.st/DP3Q
<tpb> Title: View paste DP3Q (at bpa.st)
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<jix> SLICE is used for registers
<jix> (at least the gowin architecture docs say that a configurable logic slice can contain registers, I haven't used anything gowin myself)
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<famubu[m]> I see.
<famubu[m]> But slice contains both register and LUT, I think.
<famubu[m]> I don't know why nextpnr only mentions slices and LUT count.
<famubu[m]> I had thought it was because no registers were being used.
<famubu[m]> Wild guess: Would Slices - LUT count give register/FF count?
<famubu[m]> yosys synthesis log mentions FFs and LUTs. But not the utilization report from nextpnr.
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