yosys/tests/techmap/dfflibmap_resetval_clobber.lib

library(test) {
  cell (bad_dff) {
    area : 1;
    ff("IQ", "IQN") {
      next_state : "!D"; // Look here
      clocked_on : "CLK";
      preset     : "!RST"; // Look here
    }
    pin(D) {
      direction : input;
    }
    pin(CLK) {
      direction : input;
    }
    pin(RST) {
      direction : input;
    }
    pin(Q) {
      direction: output;
      function : "IQ";
    }
    pin(QN) {
      direction: output;
      function : "IQN";
    }
  }
  cell (good_dff) {
    area : 1;
    ff("IQ", "IQN") {
      next_state : "D"; // Look here
      clocked_on : "CLK";
      clear      : "RST"; // Look here
    }
    pin(D) {
      direction : input;
    }
    pin(CLK) {
      direction : input;
    }
    pin(RST) {
      direction : input;
    }
    pin(Q) {
      direction: output;
      function : "IQ";
    }
    pin(QN) {
      direction: output;
      function : "IQN";
    }
  }
}