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diff --git a/tests/asicworld/code_hdl_models_full_subtracter_gates.v b/tests/asicworld/code_hdl_models_full_subtracter_gates.v
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+++ b/tests/asicworld/code_hdl_models_full_subtracter_gates.v
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+//-----------------------------------------------------
+// Design Name : full_subtracter_gates
+// File Name   : full_subtracter_gates.v
+// Function    : Full Subtracter Using Gates
+// Coder       : Deepak Kumar Tala
+//-----------------------------------------------------
+module full_subtracter_gates(x,y,z,difference,borrow);
+input x,y,z;
+output difference,borrow;
+
+wire inv_x,borrow1,borrow2,borrow3;
+
+not (inv_x,x);
+and U_borrow1 (borrow1,inv_x,y),
+    U_borrow2 (borrow2,inv_x,z),
+    U_borrow3 (borrow3,y,z);
+
+xor U_diff (difference,borrow1,borrow2,borrows);
+
+endmodule