From 467aaa708d8732a90f801c09bcd3631b01ac2099 Mon Sep 17 00:00:00 2001
From: mrg <mrg@ucsc.edu>
Date: Thu, 22 Apr 2021 16:13:54 -0700
Subject: [PATCH] Add noninverting logic function to custom decoder cells.

---
 compiler/custom/nand2_dec.py | 4 ++++
 compiler/custom/nand3_dec.py | 4 ++++
 compiler/custom/nand4_dec.py | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/compiler/custom/nand2_dec.py b/compiler/custom/nand2_dec.py
index 98992f42..893bb34f 100644
--- a/compiler/custom/nand2_dec.py
+++ b/compiler/custom/nand2_dec.py
@@ -70,3 +70,7 @@ class nand2_dec(design.design):
         """
         self.add_graph_edges(graph, port_nets)
 
+    def is_non_inverting(self):
+        """Return input to output polarity for module"""
+
+        return False
diff --git a/compiler/custom/nand3_dec.py b/compiler/custom/nand3_dec.py
index 34890a9c..a887e38f 100644
--- a/compiler/custom/nand3_dec.py
+++ b/compiler/custom/nand3_dec.py
@@ -70,3 +70,7 @@ class nand3_dec(design.design):
         """
         self.add_graph_edges(graph, port_nets)
 
+    def is_non_inverting(self):
+        """Return input to output polarity for module"""
+
+        return False
diff --git a/compiler/custom/nand4_dec.py b/compiler/custom/nand4_dec.py
index d89dc926..d3b6491d 100644
--- a/compiler/custom/nand4_dec.py
+++ b/compiler/custom/nand4_dec.py
@@ -70,3 +70,7 @@ class nand4_dec(design.design):
         """
         self.add_graph_edges(graph, port_nets)
 
+    def is_non_inverting(self):
+        """Return input to output polarity for module"""
+
+        return False