1 files changed, 9 insertions, 0 deletions
diff --git a/techlibs/xilinx/abc9_unmap.v b/techlibs/xilinx/abc9_unmap.v
index ad6469702..46526007d 100644
--- a/techlibs/xilinx/abc9_unmap.v
+++ b/techlibs/xilinx/abc9_unmap.v
@@ -20,6 +20,15 @@
 
 // ============================================================================
 
+(* techmap_celltype = "$__ABC9_ASYNC0 $__ABC9_ASYNC1" *)
+module \$__ABC9_ASYNC01 (input A, S, output Y);
+  assign Y = A;
+endmodule
+
+module \$__ABC9_FF_ (input D, output Q);
+  assign Q = D;
+endmodule
+
 module \$__ABC9_LUT6 (input A, input [5:0] S, output Y);
   assign Y = A;
 endmodule