From d948f7259a61a8eec0fdc94882b530e2d7f0ba12 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Sun, 1 Jan 2017 20:48:21 +0700
Subject: Updates to delay optimization project.

---
 src/opt/sbd/sbdCore.c |  2 ++
 src/opt/sbd/sbdCut2.c | 59 +++++++++++++++++++++++++--------------------------
 2 files changed, 31 insertions(+), 30 deletions(-)

(limited to 'src/opt')

diff --git a/src/opt/sbd/sbdCore.c b/src/opt/sbd/sbdCore.c
index 7df97d3b..ed3b620e 100644
--- a/src/opt/sbd/sbdCore.c
+++ b/src/opt/sbd/sbdCore.c
@@ -2009,6 +2009,7 @@ void Sbd_NtkPerformOne( Sbd_Man_t * p, int Pivot )
         Vec_IntWriteEntry( p->vMirrors, Pivot, RetValue );
         if ( p->pPars->fVerbose ) printf( "Node %5d:  Detected constant %d.\n", Pivot, RetValue );
     }
+/*
     else if ( p->pPars->nLutNum >= 1 && Sbd_ManExplore2( p, Pivot, &Truth ) )
     {
         int i;
@@ -2020,6 +2021,7 @@ void Sbd_NtkPerformOne( Sbd_Man_t * p, int Pivot )
         Sbd_ManImplement2( p, Pivot, 1, Strs );
         if ( p->pPars->fVerbose ) printf( "Node %5d:  Detected LUT%d\n", Pivot, p->pPars->nLutSize );
     }
+*/
     else if ( p->pPars->nLutNum >= 2 && Sbd_ManExplore3( p, Pivot, &nStrs, Strs ) )
     {
         Sbd_ManImplement2( p, Pivot, nStrs, Strs );
diff --git a/src/opt/sbd/sbdCut2.c b/src/opt/sbd/sbdCut2.c
index 9422e439..b4a8be74 100644
--- a/src/opt/sbd/sbdCut2.c
+++ b/src/opt/sbd/sbdCut2.c
@@ -336,36 +336,6 @@ int Sbd_ManCutServerFirst( Sbd_Srv_t * p, int iObj, int * pLeaves )
         return Vec_IntSize(p->vCut);
     }
 
-#if 0
-    // recompute the cut
-    Vec_IntClear( p->vCut );
-    Gia_ManIncrementTravId( p->pGia );
-    RetValue = Sbd_ManCutCollect_rec( p->pGia, p->vMirrors, iObj, LevStop-1, p->vLutLevs, p->vCut );
-    if ( RetValue == 0 ) // cannot build delay-improving cut
-        return -1;
-    // check if the current cut is good
-    Vec_IntSort( p->vCut, 0 );
-/*
-    Sbd_ManCutReload( p->vMirrors, p->vLutLevs, LevStop, p->vCut, p->vCutTop, p->vCutBot );
-    if ( Vec_IntSize(p->vCut) <= p->nCutSize && Vec_IntSize(p->vCutTop) <= p->nLutSize-1 )
-    {
-        //printf( "%d ", Vec_IntSize(p->vCut) );
-        memcpy( pLeaves, Vec_IntArray(p->vCut), sizeof(int) * Vec_IntSize(p->vCut) );
-        return Vec_IntSize(p->vCut);
-    }
-*/
-    // try to expand the cut
-    Sbd_ManCutExpand( p->pGia, p->vMirrors, p->vLutLevs, p->vCut );
-    Sbd_ManCutReload( p->vMirrors, p->vLutLevs, LevStop, p->vCut, p->vCutTop, p->vCutBot );
-    if ( Vec_IntSize(p->vCut) <= p->nCutSize && Vec_IntSize(p->vCutTop) <= p->nLutSize-1 )
-    {
-        //printf( "2=(%d,%d) ", Vec_IntSize(p->vCutTop), Vec_IntSize(p->vCutBot) );
-        //printf( "%d ", Vec_IntSize(p->vCut) );
-        memcpy( pLeaves, Vec_IntArray(p->vCut), sizeof(int) * Vec_IntSize(p->vCut) );
-        return Vec_IntSize(p->vCut);
-    }
-#endif
-
     // try to reduce the topmost
     Vec_IntClear( p->vCut0 );
     Vec_IntAppend( p->vCut0, p->vCut );
@@ -420,6 +390,35 @@ int Sbd_ManCutServerFirst( Sbd_Srv_t * p, int iObj, int * pLeaves )
             }
         }
     }
+
+    // recompute the cut
+    Vec_IntClear( p->vCut );
+    Gia_ManIncrementTravId( p->pGia );
+    RetValue = Sbd_ManCutCollect_rec( p->pGia, p->vMirrors, iObj, LevStop-1, p->vLutLevs, p->vCut );
+    if ( RetValue == 0 ) // cannot build delay-improving cut
+        return -1;
+    // check if the current cut is good
+    Vec_IntSort( p->vCut, 0 );
+/*
+    Sbd_ManCutReload( p->vMirrors, p->vLutLevs, LevStop, p->vCut, p->vCutTop, p->vCutBot );
+    if ( Vec_IntSize(p->vCut) <= p->nCutSize && Vec_IntSize(p->vCutTop) <= p->nLutSize-1 )
+    {
+        //printf( "%d ", Vec_IntSize(p->vCut) );
+        memcpy( pLeaves, Vec_IntArray(p->vCut), sizeof(int) * Vec_IntSize(p->vCut) );
+        return Vec_IntSize(p->vCut);
+    }
+*/
+    // try to expand the cut
+    Sbd_ManCutExpand( p->pGia, p->vMirrors, p->vLutLevs, p->vCut );
+    Sbd_ManCutReload( p->vMirrors, p->vLutLevs, LevStop, p->vCut, p->vCutTop, p->vCutBot );
+    if ( Vec_IntSize(p->vCut) <= p->nCutSize && Vec_IntSize(p->vCutTop) <= p->nLutSize-1 )
+    {
+        //printf( "2=(%d,%d) ", Vec_IntSize(p->vCutTop), Vec_IntSize(p->vCutBot) );
+        //printf( "%d ", Vec_IntSize(p->vCut) );
+        memcpy( pLeaves, Vec_IntArray(p->vCut), sizeof(int) * Vec_IntSize(p->vCut) );
+        return Vec_IntSize(p->vCut);
+    }
+
     return -1;
 }
 
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