From 38e632a954a61e02e3397e02d42142ef86fdd9cb Mon Sep 17 00:00:00 2001
From: aletempiac <alessandro.tempia@gmail.com>
Date: Fri, 12 Jan 2024 14:50:34 +0100
Subject: [PATCH] Consider buffers in matrix covering as free

---
 src/acd/ac_decomposition.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/acd/ac_decomposition.hpp b/src/acd/ac_decomposition.hpp
index 64155b713..8ba2fb20e 100644
--- a/src/acd/ac_decomposition.hpp
+++ b/src/acd/ac_decomposition.hpp
@@ -945,6 +945,10 @@ private:
       /* discard solutions with support over LUT size */
       if ( cost > ps.lut_size )
         continue;
+      
+      /* buffers have zero cost */
+      if ( cost == 1 )
+        cost = 0;
 
       float sort_cost = 0;
       if constexpr ( UseHeuristic )