From 93b96fc35c50123eb48b04d212394036dd8a8109 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Wed, 6 Dec 2017 14:34:03 -0800
Subject: An improvement to 'twoexact' and 'lutexact'.

---
 src/sat/bmc/bmc.h     | 1 +
 src/sat/bmc/bmcMaj.c  | 8 ++++++++
 src/sat/bmc/bmcMaj2.c | 8 ++++++++
 3 files changed, 17 insertions(+)

(limited to 'src/sat/bmc')

diff --git a/src/sat/bmc/bmc.h b/src/sat/bmc/bmc.h
index 00c9feb0..51f207e6 100644
--- a/src/sat/bmc/bmc.h
+++ b/src/sat/bmc/bmc.h
@@ -37,6 +37,7 @@ ABC_NAMESPACE_HEADER_START
 
 //#define USE_NODE_ORDER 1
 //#define USE_FIRST_SPECIAL 1
+//#define USE_LESS_VARS 1
 
 ////////////////////////////////////////////////////////////////////////
 ///                         BASIC TYPES                              ///
diff --git a/src/sat/bmc/bmcMaj.c b/src/sat/bmc/bmcMaj.c
index 97322eae..4700b1d4 100644
--- a/src/sat/bmc/bmcMaj.c
+++ b/src/sat/bmc/bmcMaj.c
@@ -447,7 +447,11 @@ int Exa_ManMarkup( Exa_Man_t * p )
                 continue;
             }
 #endif
+#ifdef USE_LESS_VARS
             for ( j = 1 - k; j < i - k; j++ )
+#else
+            for ( j = 0; j < i - k; j++ )
+#endif
             {
                 Vec_WecPush( p->vOutLits, j, Abc_Var2Lit(p->iVar, 0) );
                 p->VarMarks[i][k][j] = p->iVar++;
@@ -828,7 +832,11 @@ static int Exa3_ManMarkup( Exa3_Man_t * p )
                 continue;
             }
 #endif
+#ifdef USE_LESS_VARS
             for ( j = p->nLutSize - 1 - k; j < i - k; j++ )
+#else
+            for ( j = 0; j < i - k; j++ )
+#endif
             {
                 Vec_WecPush( p->vOutLits, j, Abc_Var2Lit(p->iVar, 0) );
                 p->VarMarks[i][k][j] = p->iVar++;
diff --git a/src/sat/bmc/bmcMaj2.c b/src/sat/bmc/bmcMaj2.c
index 54745118..a3c1027a 100644
--- a/src/sat/bmc/bmcMaj2.c
+++ b/src/sat/bmc/bmcMaj2.c
@@ -553,7 +553,11 @@ static int Exa_ManMarkup( Exa_Man_t * p )
                 continue;
             }
 #endif
+#ifdef USE_LESS_VARS
             for ( j = 1 - k; j < i - k; j++ )
+#else
+            for ( j = 0; j < i - k; j++ )
+#endif
             {
                 Vec_WecPush( p->vOutLits, j, Abc_Var2Lit(p->iVar, 0) );
                 p->VarMarks[i][k][j] = p->iVar++;
@@ -936,7 +940,11 @@ static int Exa3_ManMarkup( Exa3_Man_t * p )
                 continue;
             }
 #endif
+#ifdef USE_LESS_VARS
             for ( j = p->nLutSize - 1 - k; j < i - k; j++ )
+#else
+            for ( j = 0; j < i - k; j++ )
+#endif
             {
                 Vec_WecPush( p->vOutLits, j, Abc_Var2Lit(p->iVar, 0) );
                 p->VarMarks[i][k][j] = p->iVar++;
-- 
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