yosys/tests/techmap/dlatchlibmap.lib

library(test) {
  /* D-type latch with reset and preset */
  cell (dlatchn) {
    area : 6;
    latch("IQ", "IQN") {
      data_in : "D";
      enable  : "!ENA";
    }
    pin(D) {
      direction : input;
    }
    pin(ENA) {
      direction : input;
      clock : true;
    }
    pin(Q) {
      direction: output;
      function : "IQ";
    }
    pin(QN) {
      direction: output;
      function : "IQN";
    }
  }
  cell (dlatchsr) {
    area : 6;
    latch("IQ", "IQN") {
      data_in : "D";
      enable  : "ENA";
      clear   : "CLEAR";
      preset  : "PRESET";
      clear_preset_var1 : L;
      clear_preset_var2 : L;
    }
    pin(D) {
      direction : input;
    }
    pin(ENA) {
      direction : input;
      clock : true;
    }
    pin(CLEAR) {
      direction : input;
    }
    pin(PRESET) {
      direction : input;
    }
    pin(Q) {
      direction: output;
      function : "IQ";
    }
    pin(QN) {
      direction: output;
      function : "IQN";
    }
  }
}