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Diffstat (limited to 'src/base/seq/seqRetCore.c')
| -rw-r--r-- | src/base/seq/seqRetCore.c | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/src/base/seq/seqRetCore.c b/src/base/seq/seqRetCore.c deleted file mode 100644 index 846a6707..00000000 --- a/src/base/seq/seqRetCore.c +++ /dev/null @@ -1,498 +0,0 @@ -/**CFile**************************************************************** - - FileName [seqRetCore.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [Construction and manipulation of sequential AIGs.] - - Synopsis [The core of FPGA mapping/retiming package.] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - June 20, 2005.] - - Revision [$Id: seqRetCore.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "seqInt.h" -#include "dec.h" - -ABC_NAMESPACE_IMPL_START - - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -static Abc_Ntk_t * Seq_NtkRetimeDerive( Abc_Ntk_t * pNtk, int fVerbose ); -static Abc_Obj_t * Seq_NodeRetimeDerive( Abc_Ntk_t * pNtkNew, Abc_Obj_t * pNode, char * pSop, Vec_Ptr_t * vFanins ); -static Abc_Ntk_t * Seq_NtkRetimeReconstruct( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtkSeq ); -static Abc_Obj_t * Seq_EdgeReconstruct_rec( Abc_Obj_t * pGoal, Abc_Obj_t * pNode ); -static Abc_Obj_t * Seq_EdgeReconstructPO( Abc_Obj_t * pNode ); - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Performs FPGA mapping and retiming.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Abc_Ntk_t * Seq_NtkRetime( Abc_Ntk_t * pNtk, int nMaxIters, int fInitial, int fVerbose ) -{ - Abc_Seq_t * p; - Abc_Ntk_t * pNtkSeq, * pNtkNew; - int RetValue; - assert( !Abc_NtkHasAig(pNtk) ); - // derive the isomorphic seq AIG - pNtkSeq = Seq_NtkRetimeDerive( pNtk, fVerbose ); - p = pNtkSeq->pManFunc; - p->nMaxIters = nMaxIters; - - if ( !fInitial ) - Seq_NtkLatchSetValues( pNtkSeq, ABC_INIT_DC ); - // find the best mapping and retiming - if ( !Seq_NtkRetimeDelayLags( pNtk, pNtkSeq, fVerbose ) ) - return NULL; - - // implement the retiming - RetValue = Seq_NtkImplementRetiming( pNtkSeq, p->vLags, fVerbose ); - if ( RetValue == 0 ) - printf( "Retiming completed but initial state computation has failed.\n" ); -//return pNtkSeq; - - // create the final mapped network - pNtkNew = Seq_NtkRetimeReconstruct( pNtk, pNtkSeq ); - Abc_NtkDelete( pNtkSeq ); - return pNtkNew; -} - -/**Function************************************************************* - - Synopsis [Derives the isomorphic seq AIG.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Abc_Ntk_t * Seq_NtkRetimeDerive( Abc_Ntk_t * pNtk, int fVerbose ) -{ - Abc_Seq_t * p; - Abc_Ntk_t * pNtkNew; - Abc_Obj_t * pObj, * pFanin, * pMirror; - Vec_Ptr_t * vMapAnds, * vMirrors; - Vec_Vec_t * vMapFanins; - int i, k, RetValue, fHasBdds; - char * pSop; - - // make sure it is an AIG without self-feeding latches - assert( !Abc_NtkHasAig(pNtk) ); - if ( RetValue = Abc_NtkRemoveSelfFeedLatches(pNtk) ) - printf( "Modified %d self-feeding latches. The result may not verify.\n", RetValue ); - assert( Abc_NtkCountSelfFeedLatches(pNtk) == 0 ); - - // remove the dangling nodes - Abc_NtkCleanup( pNtk, fVerbose ); - - // transform logic functions from BDD to SOP - if ( fHasBdds = Abc_NtkIsBddLogic(pNtk) ) - { - if ( !Abc_NtkBddToSop(pNtk, 0) ) - { - printf( "Seq_NtkRetimeDerive(): Converting to SOPs has failed.\n" ); - return NULL; - } - } - - // start the network - pNtkNew = Abc_NtkAlloc( ABC_NTK_SEQ, ABC_FUNC_AIG, 1 ); - // duplicate the name and the spec - pNtkNew->pName = Extra_UtilStrsav(pNtk->pName); - pNtkNew->pSpec = Extra_UtilStrsav(pNtk->pSpec); - - // map the constant nodes - Abc_NtkCleanCopy( pNtk ); - // clone the PIs/POs/latches - Abc_NtkForEachPi( pNtk, pObj, i ) - Abc_NtkDupObj( pNtkNew, pObj, 0 ); - Abc_NtkForEachPo( pNtk, pObj, i ) - Abc_NtkDupObj( pNtkNew, pObj, 0 ); - // copy the names - Abc_NtkForEachPi( pNtk, pObj, i ) - Abc_ObjAssignName( pObj->pCopy, Abc_ObjName(pObj), NULL ); - Abc_NtkForEachPo( pNtk, pObj, i ) - Abc_ObjAssignName( pObj->pCopy, Abc_ObjName(pObj), NULL ); - - // create one AND for each logic node in the topological order - vMapAnds = Abc_NtkDfs( pNtk, 0 ); - Vec_PtrForEachEntry( Abc_Obj_t *, vMapAnds, pObj, i ) - { - if ( pObj->Id == 0 ) - { - pObj->pCopy = Abc_AigConst1(pNtkNew); - continue; - } - pObj->pCopy = Abc_NtkCreateNode( pNtkNew ); - } - - // make the new seq AIG point to the old network through pNext - Abc_NtkForEachObj( pNtk, pObj, i ) - if ( pObj->pCopy ) pObj->pCopy->pNext = pObj; - - // make latches point to the latch fanins - Abc_NtkForEachLatch( pNtk, pObj, i ) - { - assert( !Abc_ObjIsLatch(Abc_ObjFanin0(pObj)) ); - pObj->pCopy = Abc_ObjFanin0(pObj)->pCopy; - } - - // create internal AND nodes w/o strashing for each logic node (including constants) - vMapFanins = Vec_VecStart( Vec_PtrSize(vMapAnds) ); - Vec_PtrForEachEntry( Abc_Obj_t *, vMapAnds, pObj, i ) - { - // get the SOP of the node - if ( Abc_NtkHasMapping(pNtk) ) - pSop = Mio_GateReadSop(pObj->pData); - else - pSop = pObj->pData; - pFanin = Seq_NodeRetimeDerive( pNtkNew, pObj, pSop, Vec_VecEntry(vMapFanins, i) ); - Abc_ObjAddFanin( pObj->pCopy, pFanin ); - Abc_ObjAddFanin( pObj->pCopy, pFanin ); - } - // connect the POs - Abc_NtkForEachPo( pNtk, pObj, i ) - Abc_ObjAddFanin( pObj->pCopy, Abc_ObjFanin0(pObj)->pCopy ); - - // start the storage for initial states - p = pNtkNew->pManFunc; - Seq_Resize( p, Abc_NtkObjNumMax(pNtkNew) ); - - // add the sequential edges - Vec_PtrForEachEntry( Abc_Obj_t *, vMapAnds, pObj, i ) - { - vMirrors = Vec_VecEntry( vMapFanins, i ); - Abc_ObjForEachFanin( pObj, pFanin, k ) - { - pMirror = Vec_PtrEntry( vMirrors, k ); - if ( Abc_ObjIsLatch(pFanin) ) - { - Seq_NodeInsertFirst( pMirror, 0, Abc_LatchInit(pFanin) ); - Seq_NodeInsertFirst( pMirror, 1, Abc_LatchInit(pFanin) ); - } - } - } - // add the sequential edges to the POs - Abc_NtkForEachPo( pNtk, pObj, i ) - { - pFanin = Abc_ObjFanin0(pObj); - if ( Abc_ObjIsLatch(pFanin) ) - Seq_NodeInsertFirst( pObj->pCopy, 0, Abc_LatchInit(pFanin) ); - } - - - // save the fanin/delay info - p->vMapAnds = vMapAnds; - p->vMapFanins = vMapFanins; - p->vMapCuts = Vec_VecStart( Vec_PtrSize(p->vMapAnds) ); - p->vMapDelays = Vec_VecStart( Vec_PtrSize(p->vMapAnds) ); - Vec_PtrForEachEntry( Abc_Obj_t *, p->vMapAnds, pObj, i ) - { - // change the node to be the new one - Vec_PtrWriteEntry( p->vMapAnds, i, pObj->pCopy ); - // collect the new fanins of this node - Abc_ObjForEachFanin( pObj, pFanin, k ) - Vec_VecPush( p->vMapCuts, i, (void *)( (pFanin->pCopy->Id << 8) | Abc_ObjIsLatch(pFanin) ) ); - // collect the delay info - if ( !Abc_NtkHasMapping(pNtk) ) - { - Abc_ObjForEachFanin( pObj, pFanin, k ) - Vec_VecPush( p->vMapDelays, i, (void *)Abc_Float2Int(1.0) ); - } - else - { - Mio_Pin_t * pPin = Mio_GateReadPins(pObj->pData); - float Max, tDelayBlockRise, tDelayBlockFall; - Abc_ObjForEachFanin( pObj, pFanin, k ) - { - tDelayBlockRise = (float)Mio_PinReadDelayBlockRise( pPin ); - tDelayBlockFall = (float)Mio_PinReadDelayBlockFall( pPin ); - Max = ABC_MAX( tDelayBlockRise, tDelayBlockFall ); - Vec_VecPush( p->vMapDelays, i, (void *)Abc_Float2Int(Max) ); - pPin = Mio_PinReadNext(pPin); - } - } - } - - // set the cutset composed of latch drivers -// Abc_NtkAigCutsetCopy( pNtk ); -// Seq_NtkLatchGetEqualFaninNum( pNtkNew ); - - // convert the network back into BDDs if this is how it was - if ( fHasBdds ) - Abc_NtkSopToBdd(pNtk); - - // copy EXDC and check correctness - if ( pNtk->pExdc ) - fprintf( stdout, "Warning: EXDC is not copied when converting to sequential AIG.\n" ); - if ( !Abc_NtkCheck( pNtkNew ) ) - fprintf( stdout, "Seq_NtkRetimeDerive(): Network check has failed.\n" ); - return pNtkNew; -} - - -/**Function************************************************************* - - Synopsis [Strashes one logic node using its SOP.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Abc_Obj_t * Seq_NodeRetimeDerive( Abc_Ntk_t * pNtkNew, Abc_Obj_t * pRoot, char * pSop, Vec_Ptr_t * vFanins ) -{ - extern Abc_Obj_t * Dec_GraphToNetworkNoStrash( Abc_Ntk_t * pNtk, Dec_Graph_t * pGraph ); - Dec_Graph_t * pFForm; - Dec_Node_t * pNode; - Abc_Obj_t * pResult, * pFanin, * pMirror; - int i, nFanins; - - // get the number of node's fanins - nFanins = Abc_ObjFaninNum( pRoot ); - assert( nFanins == Abc_SopGetVarNum(pSop) ); - if ( nFanins < 2 ) - { - if ( Abc_SopIsConst1(pSop) ) - pFanin = Abc_AigConst1(pNtkNew); - else if ( Abc_SopIsConst0(pSop) ) - pFanin = Abc_ObjNot( Abc_AigConst1(pNtkNew) ); - else if ( Abc_SopIsBuf(pSop) ) - pFanin = Abc_ObjFanin0(pRoot)->pCopy; - else if ( Abc_SopIsInv(pSop) ) - pFanin = Abc_ObjNot( Abc_ObjFanin0(pRoot)->pCopy ); - else - assert( 0 ); - // create the node with these fanins - pMirror = Abc_NtkCreateNode( pNtkNew ); - Abc_ObjAddFanin( pMirror, pFanin ); - Abc_ObjAddFanin( pMirror, pFanin ); - Vec_PtrPush( vFanins, pMirror ); - return pMirror; - } - - // perform factoring - pFForm = Dec_Factor( pSop ); - // collect the fanins - Dec_GraphForEachLeaf( pFForm, pNode, i ) - { - pFanin = Abc_ObjFanin(pRoot,i)->pCopy; - pMirror = Abc_NtkCreateNode( pNtkNew ); - Abc_ObjAddFanin( pMirror, pFanin ); - Abc_ObjAddFanin( pMirror, pFanin ); - Vec_PtrPush( vFanins, pMirror ); - pNode->pFunc = pMirror; - } - // perform strashing - pResult = Dec_GraphToNetworkNoStrash( pNtkNew, pFForm ); - Dec_GraphFree( pFForm ); - return pResult; -} - - -/**Function************************************************************* - - Synopsis [Reconstructs the network after retiming.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Abc_Ntk_t * Seq_NtkRetimeReconstruct( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtkSeq ) -{ - Abc_Seq_t * p = pNtkSeq->pManFunc; - Seq_Lat_t * pRing0, * pRing1; - Abc_Ntk_t * pNtkNew; - Abc_Obj_t * pObj, * pFanin, * pFaninNew, * pMirror; - Vec_Ptr_t * vMirrors; - int i, k; - - assert( !Abc_NtkIsSeq(pNtkOld) ); - assert( Abc_NtkIsSeq(pNtkSeq) ); - - // transfer the pointers pNtkOld->pNtkSeq from pCopy to pNext - Abc_NtkForEachObj( pNtkOld, pObj, i ) - pObj->pNext = pObj->pCopy; - - // start the final network - pNtkNew = Abc_NtkStartFrom( pNtkSeq, pNtkOld->ntkType, pNtkOld->ntkFunc ); - - // transfer the pointers to the old network - if ( Abc_AigConst1(pNtkOld) ) - Abc_AigConst1(pNtkOld)->pCopy = Abc_AigConst1(pNtkNew); - Abc_NtkForEachPi( pNtkOld, pObj, i ) - pObj->pCopy = pObj->pNext->pCopy; - Abc_NtkForEachPo( pNtkOld, pObj, i ) - pObj->pCopy = pObj->pNext->pCopy; - - // copy the internal nodes of the old network into the new network - // transfer the pointers pNktOld->pNtkNew to pNtkSeq->pNtkNew - Abc_NtkForEachNode( pNtkOld, pObj, i ) - { - if ( i == 0 ) continue; - Abc_NtkDupObj( pNtkNew, pObj, 0 ); - pObj->pNext->pCopy = pObj->pCopy; - } - Abc_NtkForEachLatch( pNtkOld, pObj, i ) - pObj->pCopy = Abc_ObjFanin0(pObj)->pCopy; - - // share the latches - Seq_NtkShareLatches( pNtkNew, pNtkSeq ); - - // connect the objects -// Abc_NtkForEachNode( pNtkOld, pObj, i ) - Vec_PtrForEachEntry( Abc_Obj_t *, p->vMapAnds, pObj, i ) - { - // pObj is from pNtkSeq - transform to pNtkOld - pObj = pObj->pNext; - // iterate through the fanins of this node in the old network - vMirrors = Vec_VecEntry( p->vMapFanins, i ); - Abc_ObjForEachFanin( pObj, pFanin, k ) - { - pMirror = Vec_PtrEntry( vMirrors, k ); - assert( Seq_ObjFaninL0(pMirror) == Seq_ObjFaninL1(pMirror) ); - pRing0 = Seq_NodeGetRing( pMirror, 0 ); - pRing1 = Seq_NodeGetRing( pMirror, 1 ); - if ( pRing0 == NULL ) - { - Abc_ObjAddFanin( pObj->pCopy, pFanin->pCopy ); - continue; - } -// assert( pRing0->pLatch == pRing1->pLatch ); - if ( pRing0->pLatch->pData > pRing1->pLatch->pData ) - Abc_ObjAddFanin( pObj->pCopy, pRing0->pLatch ); - else - Abc_ObjAddFanin( pObj->pCopy, pRing1->pLatch ); - } - } - - // connect the POs - Abc_NtkForEachPo( pNtkOld, pObj, i ) - { - pFanin = Abc_ObjFanin0(pObj); - pRing0 = Seq_NodeGetRing( Abc_NtkPo(pNtkSeq, i), 0 ); - if ( pRing0 ) - pFaninNew = pRing0->pLatch; - else - pFaninNew = pFanin->pCopy; - assert( pFaninNew != NULL ); - Abc_ObjAddFanin( pObj->pCopy, pFaninNew ); - } - - // clean the result of latch sharing - Seq_NtkShareLatchesClean( pNtkSeq ); - - // add the latches and their names - Abc_NtkAddDummyBoxNames( pNtkNew ); - Abc_NtkOrderCisCos( pNtkNew ); - // fix the problem with complemented and duplicated CO edges - Abc_NtkLogicMakeSimpleCos( pNtkNew, 1 ); - if ( !Abc_NtkCheck( pNtkNew ) ) - fprintf( stdout, "Seq_NtkRetimeReconstruct(): Network check has failed.\n" ); - return pNtkNew; - -} - -/**Function************************************************************* - - Synopsis [Reconstructs the network after retiming.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Abc_Obj_t * Seq_EdgeReconstruct_rec( Abc_Obj_t * pGoal, Abc_Obj_t * pNode ) -{ - Seq_Lat_t * pRing; - Abc_Obj_t * pFanin, * pRes = NULL; - - if ( !Abc_AigNodeIsAnd(pNode) ) - return NULL; - - // consider the first fanin - pFanin = Abc_ObjFanin0(pNode); - if ( pFanin->pCopy == NULL ) // internal node - pRes = Seq_EdgeReconstruct_rec( pGoal, pFanin ); - else if ( pFanin == pGoal ) - { - if ( pRing = Seq_NodeGetRing( pNode, 0 ) ) - pRes = pRing->pLatch; - else - pRes = pFanin->pCopy; - } - if ( pRes != NULL ) - return pRes; - - // consider the second fanin - pFanin = Abc_ObjFanin1(pNode); - if ( pFanin->pCopy == NULL ) // internal node - pRes = Seq_EdgeReconstruct_rec( pGoal, pFanin ); - else if ( pFanin == pGoal ) - { - if ( pRing = Seq_NodeGetRing( pNode, 1 ) ) - pRes = pRing->pLatch; - else - pRes = pFanin->pCopy; - } - return pRes; -} - -/**Function************************************************************* - - Synopsis [Reconstructs the network after retiming.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Abc_Obj_t * Seq_EdgeReconstructPO( Abc_Obj_t * pNode ) -{ - Seq_Lat_t * pRing; - assert( Abc_ObjIsPo(pNode) ); - if ( pRing = Seq_NodeGetRing( pNode, 0 ) ) - return pRing->pLatch; - else - return Abc_ObjFanin0(pNode)->pCopy; -} - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - -ABC_NAMESPACE_IMPL_END - |