New MFS package.

1 files changed, 189 insertions, 0 deletions

diff --git a/src/base/abci/abcMfs.c b/src/base/abci/abcMfs.c
new file mode 100644
index 00000000..ddc91467
--- /dev/null
+++ b/src/base/abci/abcMfs.c
@@ -0,0 +1,189 @@
+/**CFile****************************************************************
+
+  FileName    [abcMfs.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Network and node package.]
+
+  Synopsis    [Optimization with don't-cares.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: abcMfs.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "base/abc/abc.h"
+#include "opt/sfm/sfm.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+ 
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Ptr_t * Abc_NtkAssignIDs( Abc_Ntk_t * pNtk )
+{
+    Vec_Ptr_t * vNodes;
+    Abc_Obj_t * pObj;
+    int i;
+    vNodes = Abc_NtkDfs( pNtk, 0 );
+    Abc_NtkCleanCopy( pNtk );
+    Abc_NtkForEachPi( pNtk, pObj, i )
+        pObj->iTemp = i;
+    Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pObj, i )
+        pObj->iTemp = Abc_NtkPiNum(pNtk) + i;
+    Abc_NtkForEachPo( pNtk, pObj, i )
+        pObj->iTemp = Abc_NtkPiNum(pNtk) + Vec_PtrSize(vNodes) + i;
+    return vNodes;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Extracts information about the network.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Sfm_Ntk_t * Abc_NtkExtractMfs( Abc_Ntk_t * pNtk )
+{
+    Vec_Ptr_t * vNodes;
+    Vec_Wec_t * vFanins;
+    Vec_Str_t * vFixed;
+    Vec_Wrd_t * vTruths;
+    Vec_Int_t * vArray;
+    Abc_Obj_t * pObj, * pFanin;
+    int i, k, nObjs;
+    vNodes  = Abc_NtkAssignIDs( pNtk );
+    nObjs   = Abc_NtkPiNum(pNtk) + Vec_PtrSize(vNodes) + Abc_NtkPoNum(pNtk);
+    vFanins = Vec_WecStart( nObjs );
+    vFixed  = Vec_StrStart( nObjs );
+    vTruths = Vec_WrdStart( nObjs );
+    Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pObj, i )
+    {
+        vArray = Vec_WecEntry( vFanins, pObj->iTemp );
+        Vec_IntGrow( vArray, Abc_ObjFaninNum(pObj) );
+        Abc_ObjForEachFanin( pObj, pFanin, k )
+            Vec_IntPush( vArray, pFanin->iTemp );
+        Vec_WrdWriteEntry( vTruths, pObj->iTemp, Abc_SopToTruth((char *)pObj->pData, Abc_ObjFaninNum(pObj)) );
+    }
+    Abc_NtkForEachPo( pNtk, pObj, i )
+    {
+        vArray = Vec_WecEntry( vFanins, pObj->iTemp );
+        Vec_IntGrow( vArray, Abc_ObjFaninNum(pObj) );
+        Abc_ObjForEachFanin( pObj, pFanin, k )
+            Vec_IntPush( vArray, pFanin->iTemp );
+    }
+    Vec_PtrFree( vNodes );
+    return Sfm_NtkConstruct( vFanins, Abc_NtkPiNum(pNtk), Abc_NtkPoNum(pNtk), vFixed, vTruths );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Abc_NtkInsertMfs( Abc_Ntk_t * pNtk, Sfm_Ntk_t * p )
+{
+    Vec_Int_t * vMap, * vArray;
+    Abc_Obj_t * pNode;
+    int i, k, Fanin;
+    // map new IDs into old nodes
+    vMap = Vec_IntStart( Abc_NtkObjNumMax(pNtk) );
+    Abc_NtkForEachPi( pNtk, pNode, i )
+        Vec_IntWriteEntry( vMap, pNode->iTemp, Abc_ObjId(pNode) );
+    Abc_NtkForEachNode( pNtk, pNode, i )
+        if ( pNode->iTemp > 0 )
+            Vec_IntWriteEntry( vMap, pNode->iTemp, Abc_ObjId(pNode) );
+    // remove old fanins
+    Abc_NtkForEachNode( pNtk, pNode, i )
+        Abc_ObjRemoveFanins( pNode );
+    // create new fanins
+    Abc_NtkForEachNode( pNtk, pNode, i )
+        if ( pNode->iTemp > 0 && !Sfm_NodeReadFixed(p, pNode->iTemp) )
+        {
+            vArray = Sfm_NodeReadFanins( p, pNode->iTemp );
+            Vec_IntForEachEntry( vArray, Fanin, k )
+                Abc_ObjAddFanin( pNode, Abc_NtkObj(pNtk, Vec_IntEntry(vMap, Fanin)) );
+            pNode->pData = Abc_SopCreateFromTruth( (Mem_Flex_t *)pNtk->pManFunc, Vec_IntSize(vArray), (unsigned *)Sfm_NodeReadTruth(p, pNode->iTemp) );
+        }
+    Vec_IntFree( vMap );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Abc_NtkPerformMfs( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars )
+{
+    Sfm_Ntk_t * p;
+    int nFaninMax, nNodes;
+    assert( Abc_NtkIsSopLogic(pNtk) );
+    // count fanouts
+    nFaninMax = Abc_NtkGetFaninMax( pNtk );
+    if ( nFaninMax > 6 )
+    {
+        Abc_Print( 1, "Currently \"mfs\" cannot process the network containing nodes with more than 6 fanins.\n" );
+        return 0;
+    }
+    // collect information
+    p = Abc_NtkExtractMfs( pNtk );
+    // perform optimization
+    nNodes = Sfm_NtkPerform( p, pPars );
+    // call the fast extract procedure
+    if ( nNodes == 0 )
+        Abc_Print( 1, "The networks is not changed by \"mfs\".\n" );
+    else
+    {
+        Abc_NtkInsertMfs( pNtk, p );
+        Abc_Print( 1, "The networks has %d nodes changed by \"mfs\".\n", nNodes );
+    }
+    Sfm_NtkFree( p );
+    return 1;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+