From 3d8dc1217c3634963e36f793d475cb73622d8719 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Tue, 17 Sep 2013 23:00:59 -0700
Subject: Integrating input driving cell constraint into buffering/sizing.

---
 src/map/scl/sclDnsize.c |  3 ++-
 src/map/scl/sclSize.c   | 21 ++++++++++++++++++++-
 src/map/scl/sclSize.h   |  2 ++
 src/map/scl/sclUpsize.c |  3 ++-
 4 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/src/map/scl/sclDnsize.c b/src/map/scl/sclDnsize.c
index 4bc21d28..b81b640f 100644
--- a/src/map/scl/sclDnsize.c
+++ b/src/map/scl/sclDnsize.c
@@ -53,7 +53,8 @@ void Abc_SclFindWindow( Abc_Obj_t * pPivot, Vec_Int_t ** pvNodes, Vec_Int_t ** p
     // collect fanins, node, and fanouts
     Vec_IntClear( vNodes );
     Abc_ObjForEachFanin( pPivot, pNext, i )
-        if ( Abc_ObjIsNode(pNext) && Abc_ObjFaninNum(pNext) > 0 )
+//        if ( Abc_ObjIsNode(pNext) && Abc_ObjFaninNum(pNext) > 0 )
+        if ( Abc_ObjIsCi(pNext) || Abc_ObjFaninNum(pNext) > 0 )
             Vec_IntPush( vNodes, Abc_ObjId(pNext) );
     Vec_IntPush( vNodes, Abc_ObjId(pPivot) );
     Abc_ObjForEachFanout( pPivot, pNext, i )
diff --git a/src/map/scl/sclSize.c b/src/map/scl/sclSize.c
index 0cc282a9..33b7474a 100644
--- a/src/map/scl/sclSize.c
+++ b/src/map/scl/sclSize.c
@@ -225,6 +225,16 @@ static inline float Abc_SclObjLoadValue( SC_Man * p, Abc_Obj_t * pObj )
 //    float Value = Abc_MaxFloat(pLoad->fall, pLoad->rise) / (p->EstLoadAve * p->EstLoadMax);
     return (0.5 * Abc_SclObjLoad(p, pObj)->fall + 0.5 * Abc_SclObjLoad(p, pObj)->rise) / (p->EstLoadAve * p->EstLoadMax);
 }
+static inline void Abc_SclTimeCi( SC_Man * p, Abc_Obj_t * pObj )
+{
+    if ( p->pPiDrive != NULL )
+    {
+        SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
+        SC_Pair * pTime = Abc_SclObjTime( p, pObj );
+        SC_Pair * pSlew = Abc_SclObjSlew( p, pObj );
+        Scl_LibHandleInputDriver( p->pPiDrive, pLoad, pTime, pSlew );
+    }
+}
 void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept )
 {
     SC_Timing * pTime;
@@ -237,6 +247,12 @@ void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept )
     float DeptFall = 0;
     float Value = p->EstLoadMax ? Abc_SclObjLoadValue( p, pObj ) : 0;
     Abc_Obj_t * pFanin;
+    if ( Abc_ObjIsCi(pObj) )
+    {
+        assert( !fDept );
+        Abc_SclTimeCi( p, pObj );
+        return;
+    }
     if ( Abc_ObjIsCo(pObj) )
     {
         if ( !fDept )
@@ -319,6 +335,8 @@ void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fRe
     Abc_SclComputeLoad( p );
     Abc_SclManCleanTime( p );
     p->nEstNodes = 0;
+    Abc_NtkForEachCi( p->pNtk, pObj, i )
+        Abc_SclTimeNode( p, pObj, 0 );
     Abc_NtkForEachNode1( p->pNtk, pObj, i )
         Abc_SclTimeNode( p, pObj, 0 );
     Abc_NtkForEachCo( p->pNtk, pObj, i )
@@ -376,7 +394,8 @@ static inline void Abc_SclTimeIncAddFanins( SC_Man * p, Abc_Obj_t * pObj )
     Abc_Obj_t * pFanin;
     int i;
     Abc_ObjForEachFanin( pObj, pFanin, i )
-        if ( !pFanin->fMarkC && Abc_ObjIsNode(pFanin) )
+//        if ( !pFanin->fMarkC && Abc_ObjIsNode(pFanin) )
+        if ( !pFanin->fMarkC )
             Abc_SclTimeIncAddNode( p, pFanin );
 }
 static inline void Abc_SclTimeIncAddFanouts( SC_Man * p, Abc_Obj_t * pObj )
diff --git a/src/map/scl/sclSize.h b/src/map/scl/sclSize.h
index 86008e54..cee260ab 100644
--- a/src/map/scl/sclSize.h
+++ b/src/map/scl/sclSize.h
@@ -256,6 +256,7 @@ static inline void Abc_SclManCleanTime( SC_Man * p )
     memset( p->pTimes, 0, sizeof(SC_Pair) * p->nObjs );
     memset( p->pSlews, 0, sizeof(SC_Pair) * p->nObjs );
     memset( p->pDepts, 0, sizeof(SC_Pair) * p->nObjs );
+/*
     if ( p->pPiDrive != NULL )
     {
         SC_Pair * pSlew, * pTime, * pLoad;
@@ -269,6 +270,7 @@ static inline void Abc_SclManCleanTime( SC_Man * p )
             Scl_LibHandleInputDriver( p->pPiDrive, pLoad, pTime, pSlew );
         }
     }
+*/
 }
 
 
diff --git a/src/map/scl/sclUpsize.c b/src/map/scl/sclUpsize.c
index 09eadfa0..d7196216 100644
--- a/src/map/scl/sclUpsize.c
+++ b/src/map/scl/sclUpsize.c
@@ -222,7 +222,8 @@ void Abc_SclFindNodesToUpdate( Abc_Obj_t * pPivot, Vec_Int_t ** pvNodes, Vec_Int
     // collect fanins, node, and fanouts
     Vec_IntClear( vNodes );
     Abc_ObjForEachFanin( pPivot, pNext, i )
-        if ( Abc_ObjIsNode(pNext) && Abc_ObjFaninNum(pNext) > 0 )
+//        if ( Abc_ObjIsNode(pNext) && Abc_ObjFaninNum(pNext) > 0 )
+        if ( Abc_ObjIsCi(pNext) || Abc_ObjFaninNum(pNext) > 0 )
             Vec_IntPush( vNodes, Abc_ObjId(pNext) );
     Vec_IntPush( vNodes, Abc_ObjId(pPivot) );
     if ( pExtra )
-- 
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