From 57e647c7043ee8cb6e3783d140c667f0f27c41c4 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sat, 22 Feb 2020 12:10:50 +0100
Subject: [PATCH] enable "null allowed" for reset input

---
 src/xspice/icm/digital/d_state/cfunc.mod | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/xspice/icm/digital/d_state/cfunc.mod b/src/xspice/icm/digital/d_state/cfunc.mod
index 18f4ed371..8fc56db45 100644
--- a/src/xspice/icm/digital/d_state/cfunc.mod
+++ b/src/xspice/icm/digital/d_state/cfunc.mod
@@ -1879,7 +1879,9 @@ void cm_d_state(ARGS)
 
         LOAD(clk) = PARAM(clk_load);
 
-        LOAD(reset) = PARAM(reset_load);
+        if ( !PORT_NULL(reset) ) {
+            LOAD(reset) = PARAM(reset_load);
+        }
 
     }
     else {  /**** Retrieve previous values ****/