mirror of https://github.com/YosysHQ/abc.git
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
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/**CFile****************************************************************
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FileName [resCore.c]
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SystemName [ABC: Logic synthesis and verification system.]
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PackageName [Resynthesis package.]
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Synopsis [Top-level resynthesis procedure.]
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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: resCore.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
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***********************************************************************/
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#include "abc.h"
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#include "res.h"
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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 [Entrace into the resynthesis package.]
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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_NtkResynthesize( Abc_Ntk_t * pNtk, int nWindow, int nSimWords, int fVerbose, int fVeryVerbose )
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{
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Res_Win_t * pWin;
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Res_Sim_t * pSim;
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Abc_Ntk_t * pAig;
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Abc_Obj_t * pObj;
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Hop_Obj_t * pFunc;
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Vec_Ptr_t * vFanins;
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int i, nNodesOld;
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assert( Abc_NtkHasAig(pNtk) );
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assert( nWindow > 0 && nWindow < 100 );
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// start the window
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pWin = Res_WinAlloc();
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pSim = Res_SimAlloc( nSimWords );
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// set the number of levels
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Abc_NtkLevel( pNtk );
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// try resynthesizing nodes in the topological order
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nNodesOld = Abc_NtkObjNumMax(pNtk);
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Abc_NtkForEachObj( pNtk, pObj, i )
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{
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if ( !Abc_ObjIsNode(pObj) )
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continue;
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if ( pObj->Id > nNodesOld )
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break;
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// create the window for this node
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if ( !Res_WinCompute(pObj, nWindow/10, nWindow%10, pObj->Level - 1, pWin) )
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continue;
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// create the AIG for the window
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pAig = Res_WndStrash( pWin );
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// prepare simulation info
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if ( !Res_SimPrepare( pSim, pAig ) )
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{
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Abc_NtkDelete( pAig );
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continue;
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}
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// find resub candidates for the node
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vFanins = Res_FilterCandidates( pWin, pSim );
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// check using SAT
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pFunc = Res_SatFindFunction( pNtk->pManFunc, pWin, vFanins, pAig );
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Abc_NtkDelete( pAig );
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if ( pFunc == NULL )
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continue;
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// update the network
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Res_UpdateNetwork( pObj, vFanins, pFunc );
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}
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Res_WinFree( pWin );
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Res_SimFree( pSim );
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// check the resulting network
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if ( !Abc_NtkCheck( pNtk ) )
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{
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fprintf( stdout, "Abc_NtkResynthesize(): Network check has failed.\n" );
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return 0;
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}
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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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