library(xc2_dff) {
  cell(FDCP) {
    area: 1;
    ff("IQ", "IQN") { clocked_on: C;
                      next_state: D;
                      clear: "CLR";
                      preset: "PRE"; }
    pin(C) { direction: input;
             clock: true; }
    pin(D) { direction: input; }
    pin(Q) { direction: output;
             function: "IQ"; }
    pin(CLR) { direction: input; }
    pin(PRE) { direction: input; }
  }

  cell(FDCP_N) {
    area: 1;
    ff("IQ", "IQN") { clocked_on: "!C";
                      next_state: D;
                      clear: "CLR";
                      preset: "PRE"; }
    pin(C) { direction: input;
             clock: true; }
    pin(D) { direction: input; }
    pin(Q) { direction: output;
             function: "IQ"; }
    pin(CLR) { direction: input; }
    pin(PRE) { direction: input; }
  }
}