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