yosys/tests/techmap/dlatchlibmap_dlatch_not_data.lib

library (test_not_data) {
  cell (dff_not_data) {
    area: 1.0;
    pin (QN) {
      direction : output;
      function : "STATE";
    }
    pin (ENA) {
      direction : input;
      clock : true;
    }
    pin (D) {
      direction : input;
    }
    pin (RN) {
      direction : input;
    }
    latch (STATE, STATEN) {
      enable: "ENA";
      data_in: "!D";
      preset : "!RN";
    }
  }
}