yosys/tests/techmap/dfflibmap_noninv.lib

library(test) {
  // both cells have the same area and pin count, but only DFF_Q has a non-inverted output
  cell (DFF_QN) {
    area : 1;
    ff("IQ", "IQN") {
      next_state : "D";
      clocked_on : "CLK";
    }
    pin(D) {
      direction : input;
    }
    pin(CLK) {
      direction : input;
    }
    pin(QN) {
      direction: output;
      function : "IQN";
    }
  }
  cell (DFF_Q) {
    area : 1;
    ff("IQ", "IQN") {
      next_state : "D";
      clocked_on : "CLK";
    }
    pin(D) {
      direction : input;
    }
    pin(CLK) {
      direction : input;
    }
    pin(Q) {
      direction: output;
      function : "IQ";
    }
  }
  // identical to DFF_Q, so the first of the two must win
  cell (DFF_Q_ALT) {
    area : 1;
    ff("IQ", "IQN") {
      next_state : "D";
      clocked_on : "CLK";
    }
    pin(D) {
      direction : input;
    }
    pin(CLK) {
      direction : input;
    }
    pin(Q) {
      direction: output;
      function : "IQ";
    }
  }
}