5. Executing DFFLIBMAP pass (mapping DFF cells to sequential cells from liberty file).
  cell 74574 (noninv, pins=3, area=3.00) is a direct match for cell type $_DFF_P_.
  create mapping for $_DFF_N_ from mapping for $_DFF_P_.
  final dff cell mappings:
    74574 _DFF_N_ (.CLK(~C), .D( D), .Q( Q));
    74574 _DFF_P_ (.CLK( C), .D( D), .Q( Q));
    unmapped dff cell: $_DFF_NN0_
    unmapped dff cell: $_DFF_NN1_
    unmapped dff cell: $_DFF_NP0_
    unmapped dff cell: $_DFF_NP1_
    unmapped dff cell: $_DFF_PN0_
    unmapped dff cell: $_DFF_PN1_
    unmapped dff cell: $_DFF_PP0_
    unmapped dff cell: $_DFF_PP1_
    unmapped dff cell: $_DFFSR_NNN_
    unmapped dff cell: $_DFFSR_NNP_
    unmapped dff cell: $_DFFSR_NPN_
    unmapped dff cell: $_DFFSR_NPP_
    unmapped dff cell: $_DFFSR_PNN_
    unmapped dff cell: $_DFFSR_PNP_
    unmapped dff cell: $_DFFSR_PPN_
    unmapped dff cell: $_DFFSR_PPP_
Mapping DFF cells in module `\picorv32':
  mapped 1613 $_DFF_P_ cells to \74574 cells.