Gate sizing with barrier buffers.

3 files changed, 71 insertions, 0 deletions

diff --git a/src/base/abc/abc.h b/src/base/abc/abc.h
index 6e5f3301..d684d3df 100644
--- a/src/base/abc/abc.h
+++ b/src/base/abc/abc.h
@@ -610,6 +610,7 @@ extern ABC_DLL Abc_Ntk_t *        Abc_NtkDarLatchSweep( Abc_Ntk_t * pNtk, int fL
 extern ABC_DLL float              Abc_NtkDelayTraceLut( Abc_Ntk_t * pNtk, int fUseLutLib );
 /*=== abcDfs.c ==========================================================*/
 extern ABC_DLL Vec_Ptr_t *        Abc_NtkDfs( Abc_Ntk_t * pNtk, int fCollectAll );
+extern ABC_DLL Vec_Ptr_t *        Abc_NtkDfs2( Abc_Ntk_t * pNtk );
 extern ABC_DLL Vec_Ptr_t *        Abc_NtkDfsNodes( Abc_Ntk_t * pNtk, Abc_Obj_t ** ppNodes, int nNodes );
 extern ABC_DLL Vec_Ptr_t *        Abc_NtkDfsReverse( Abc_Ntk_t * pNtk );
 extern ABC_DLL Vec_Ptr_t *        Abc_NtkDfsReverseNodes( Abc_Ntk_t * pNtk, Abc_Obj_t ** ppNodes, int nNodes );
@@ -755,6 +756,7 @@ extern ABC_DLL Abc_Ntk_t *        Abc_NtkStartRead( char * pName );
 extern ABC_DLL void               Abc_NtkFinalizeRead( Abc_Ntk_t * pNtk );
 extern ABC_DLL Abc_Ntk_t *        Abc_NtkDup( Abc_Ntk_t * pNtk );
 extern ABC_DLL Abc_Ntk_t *        Abc_NtkDupDfs( Abc_Ntk_t * pNtk );
+extern ABC_DLL Abc_Ntk_t *        Abc_NtkDupDfsNoBarBufs( Abc_Ntk_t * pNtk );
 extern ABC_DLL Abc_Ntk_t *        Abc_NtkDupTransformMiter( Abc_Ntk_t * pNtk );
 extern ABC_DLL Abc_Ntk_t *        Abc_NtkCreateCone( Abc_Ntk_t * pNtk, Abc_Obj_t * pNode, char * pNodeName, int fUseAllCis );
 extern ABC_DLL Abc_Ntk_t *        Abc_NtkCreateConeArray( Abc_Ntk_t * pNtk, Vec_Ptr_t * vRoots, int fUseAllCis );
diff --git a/src/base/abc/abcDfs.c b/src/base/abc/abcDfs.c
index 1825087e..9dd2b4bf 100644
--- a/src/base/abc/abcDfs.c
+++ b/src/base/abc/abcDfs.c
@@ -110,6 +110,31 @@ Vec_Ptr_t * Abc_NtkDfs( Abc_Ntk_t * pNtk, int fCollectAll )
 
   Synopsis    [Returns the DFS ordered array of logic nodes.]
 
+  Description [Collects only the internal nodes, leaving out CIs and CO.
+  However it marks with the current TravId both CIs and COs.]
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Ptr_t * Abc_NtkDfs2( Abc_Ntk_t * pNtk )
+{
+    Vec_Ptr_t * vNodes = Vec_PtrAlloc( 100 );
+    Abc_Obj_t * pObj;  int i;
+    Abc_NtkIncrementTravId( pNtk );
+    Abc_NtkForEachCo( pNtk, pObj, i )
+    {
+        Abc_NodeSetTravIdCurrent( pObj );
+        Abc_NtkDfs_rec( Abc_ObjFanin0Ntk(Abc_ObjFanin0(pObj)), vNodes );
+    }
+    return vNodes;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Returns the DFS ordered array of logic nodes.]
+
   Description [Collects only the internal nodes, leaving out PIs, POs and latches.]
                
   SideEffects []
diff --git a/src/base/abc/abcNtk.c b/src/base/abc/abcNtk.c
index cb52924f..ed00968b 100644
--- a/src/base/abc/abcNtk.c
+++ b/src/base/abc/abcNtk.c
@@ -513,6 +513,50 @@ Abc_Ntk_t * Abc_NtkDupDfs( Abc_Ntk_t * pNtk )
     pNtk->pCopy = pNtkNew;
     return pNtkNew;
 }
+Abc_Ntk_t * Abc_NtkDupDfsNoBarBufs( Abc_Ntk_t * pNtk )
+{
+    Vec_Ptr_t * vNodes;
+    Abc_Ntk_t * pNtkNew; 
+    Abc_Obj_t * pObj, * pFanin;
+    int i, k;
+    if ( pNtk == NULL )
+        return NULL;
+    assert( Abc_NtkIsLogic(pNtk) );
+    assert( pNtk->nBarBufs2 > 0 );
+    // start the network
+    pNtkNew = Abc_NtkStartFrom( pNtk, pNtk->ntkType, pNtk->ntkFunc );
+    // copy the internal nodes
+    vNodes = Abc_NtkDfs2( pNtk );
+    Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pObj, i )
+        if ( Abc_ObjIsBarBuf(pObj) )
+            pObj->pCopy = Abc_ObjFanin0(pObj)->pCopy;
+        else
+            Abc_NtkDupObj( pNtkNew, pObj, 0 );
+    Vec_PtrFree( vNodes );
+    // reconnect all objects (no need to transfer attributes on edges)
+    Abc_NtkForEachObj( pNtk, pObj, i )
+        if ( !Abc_ObjIsBox(pObj) && !Abc_ObjIsBo(pObj) && !Abc_ObjIsBarBuf(pObj) )
+            Abc_ObjForEachFanin( pObj, pFanin, k )
+                if ( pObj->pCopy && pFanin->pCopy )
+                    Abc_ObjAddFanin( pObj->pCopy, pFanin->pCopy );
+    // duplicate the EXDC Ntk
+    if ( pNtk->pExdc )
+        pNtkNew->pExdc = Abc_NtkDup( pNtk->pExdc );
+    if ( pNtk->pExcare )
+        pNtkNew->pExcare = Abc_NtkDup( (Abc_Ntk_t *)pNtk->pExcare );
+    // duplicate timing manager
+    if ( pNtk->pManTime )
+        Abc_NtkTimeInitialize( pNtkNew, pNtk );
+    if ( pNtk->vPhases )
+        Abc_NtkTransferPhases( pNtkNew, pNtk );
+    if ( pNtk->pWLoadUsed )
+        pNtkNew->pWLoadUsed = Abc_UtilStrsav( pNtk->pWLoadUsed );
+    // check correctness
+    if ( !Abc_NtkCheck( pNtkNew ) )
+        fprintf( stdout, "Abc_NtkDup(): Network check has failed.\n" );
+    pNtk->pCopy = pNtkNew;
+    return pNtkNew;
+}
 
 /**Function*************************************************************