yosys/techlibs/xilinx/abc_xc7.lut

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# Max delays from https://github.com/SymbiFlow/prjxray-db/blob/82bf5f158cd8e9a11ac4d04f1aeef48ed1a528a5/artix7/timings/CLBLL_L.sdf
# and https://github.com/SymbiFlow/prjxray-db/blob/82bf5f158cd8e9a11ac4d04f1aeef48ed1a528a5/artix7/tile_type_CLBLL_L.json
# K area delay
1 1 127
2 2 127 238
3 3 127 238 407
4 3 127 238 407 472
5 3 127 238 407 472 631
6 5 127 238 407 472 631 642
# F7AMUX + F7BMUX / 2
7 10 286 335 446 615 680 839 850
# F8MUX
# F8MUX+F7MUX
8 20 273 390 439 550 719 784 943 954