diff --git a/techlibs/common/Makefile.inc b/techlibs/common/Makefile.inc
index dc1e0ef6..d2ce61cf 100644
--- a/techlibs/common/Makefile.inc
+++ b/techlibs/common/Makefile.inc
@@ -15,4 +15,5 @@ $(eval $(call add_share_file,share,techlibs/common/techmap.v))
 $(eval $(call add_share_file,share,techlibs/common/blackbox.v))
 $(eval $(call add_share_file,share,techlibs/common/pmux2mux.v))
 $(eval $(call add_share_file,share,techlibs/common/adff2dff.v))
+$(eval $(call add_share_file,share,techlibs/common/cells.lib))
 
diff --git a/techlibs/common/cells.lib b/techlibs/common/cells.lib
new file mode 100644
index 00000000..eb89036d
--- /dev/null
+++ b/techlibs/common/cells.lib
@@ -0,0 +1,108 @@
+library(yosys_cells) {
+	cell(DFF_N) {
+		ff(IQ, IQN) {
+			clocked_on: "!C";
+			next_state: "D";
+		}
+		pin(D) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_P) {
+		ff(IQ, IQN) {
+			clocked_on: "C";
+			next_state: "D";
+		}
+		pin(D) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_NN0) {
+		ff(IQ, IQN) {
+			clocked_on: "!C";
+			next_state: "D";
+			clear: "!R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_NN1) {
+		ff(IQ, IQN) {
+			clocked_on: "!C";
+			next_state: "D";
+			preset: "!R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_NP0) {
+		ff(IQ, IQN) {
+			clocked_on: "!C";
+			next_state: "D";
+			clear: "R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_NP1) {
+		ff(IQ, IQN) {
+			clocked_on: "!C";
+			next_state: "D";
+			preset: "R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_PN0) {
+		ff(IQ, IQN) {
+			clocked_on: "C";
+			next_state: "D";
+			clear: "!R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_PN1) {
+		ff(IQ, IQN) {
+			clocked_on: "C";
+			next_state: "D";
+			preset: "!R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_PP0) {
+		ff(IQ, IQN) {
+			clocked_on: "C";
+			next_state: "D";
+			clear: "R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+	cell(DFF_PP1) {
+		ff(IQ, IQN) {
+			clocked_on: "C";
+			next_state: "D";
+			preset: "R";
+		}
+		pin(D) { direction: input; }
+		pin(R) { direction: input; }
+		pin(C) { direction: input; clock: true; }
+		pin(Q) { direction: output; function: "IQ"; }
+	}
+}