1 files changed, 139 insertions, 0 deletions
diff --git a/src/map/fpga/fpgaFanout.c b/src/map/fpga/fpgaFanout.c
new file mode 100644
index 00000000..50809f65
--- /dev/null
+++ b/src/map/fpga/fpgaFanout.c
@@ -0,0 +1,139 @@
+/**CFile****************************************************************
+
+  FileName    [fpgaFanout.c]
+
+  PackageName [FRAIG: Functionally reduced AND-INV graphs.]
+
+  Synopsis    [Procedures to manipulate fanouts of the FRAIG nodes.]
+
+  Author      [Alan Mishchenko <alanmi@eecs.berkeley.edu>]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 2.0. Started - August 18, 2004.]
+
+  Revision    [$Id: fpgaFanout.c,v 1.1 2005/01/23 06:59:41 alanmi Exp $]
+
+***********************************************************************/
+
+#include "fpgaInt.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFITIONS                           ///
+////////////////////////////////////////////////////////////////////////
+
+
+/**Function*************************************************************
+
+  Synopsis    [Add the fanout to the node.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Fpga_NodeAddFaninFanout( Fpga_Node_t * pFanin, Fpga_Node_t * pFanout )
+{
+    Fpga_Node_t * pPivot;
+
+    // pFanins is a fanin of pFanout
+    assert( !Fpga_IsComplement(pFanin) );
+    assert( !Fpga_IsComplement(pFanout) );
+    assert( Fpga_Regular(pFanout->p1) == pFanin || Fpga_Regular(pFanout->p2) == pFanin );
+
+    pPivot = pFanin->pFanPivot;
+    if ( pPivot == NULL )
+    {
+        pFanin->pFanPivot = pFanout;
+        return;
+    }
+
+    if ( Fpga_Regular(pPivot->p1) == pFanin )
+    {
+        if ( Fpga_Regular(pFanout->p1) == pFanin )
+        {
+            pFanout->pFanFanin1 = pPivot->pFanFanin1;
+            pPivot->pFanFanin1  = pFanout;
+        }
+        else // if ( Fpga_Regular(pFanout->p2) == pFanin )
+        {
+            pFanout->pFanFanin2 = pPivot->pFanFanin1;
+            pPivot->pFanFanin1  = pFanout;
+        }
+    }
+    else // if ( Fpga_Regular(pPivot->p2) == pFanin )
+    {
+        assert( Fpga_Regular(pPivot->p2) == pFanin );
+        if ( Fpga_Regular(pFanout->p1) == pFanin )
+        {
+            pFanout->pFanFanin1 = pPivot->pFanFanin2;
+            pPivot->pFanFanin2  = pFanout;
+        }
+        else // if ( Fpga_Regular(pFanout->p2) == pFanin )
+        {
+            pFanout->pFanFanin2 = pPivot->pFanFanin2;
+            pPivot->pFanFanin2  = pFanout;
+        }
+    }
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Add the fanout to the node.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Fpga_NodeRemoveFaninFanout( Fpga_Node_t * pFanin, Fpga_Node_t * pFanoutToRemove )
+{
+    Fpga_Node_t * pFanout, * pFanout2, ** ppFanList;
+    // start the linked list of fanouts
+    ppFanList = &pFanin->pFanPivot; 
+    // go through the fanouts
+    Fpga_NodeForEachFanoutSafe( pFanin, pFanout, pFanout2 )
+    {
+        // skip the fanout-to-remove
+        if ( pFanout == pFanoutToRemove )
+            continue;
+        // add useful fanouts to the list
+        *ppFanList = pFanout;
+        ppFanList = Fpga_NodeReadNextFanoutPlace( pFanin, pFanout );
+    }
+    *ppFanList = NULL;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Returns the number of fanouts of a node.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Fpga_NodeGetFanoutNum( Fpga_Node_t * pNode )
+{
+    Fpga_Node_t * pFanout;
+    int Counter = 0;
+    Fpga_NodeForEachFanout( pNode, pFanout )
+        Counter++;
+    return Counter;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+