diff options
Diffstat (limited to 'src/base/abci/abcHaig.c')
| -rw-r--r-- | src/base/abci/abcHaig.c | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/src/base/abci/abcHaig.c b/src/base/abci/abcHaig.c new file mode 100644 index 00000000..87fada22 --- /dev/null +++ b/src/base/abci/abcHaig.c @@ -0,0 +1,506 @@ +/**CFile**************************************************************** + + FileName [abcHaig.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Network and node package.] + + Synopsis [Implements history AIG for combinational rewriting.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: abcHaig.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "abc.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Start history AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Abc_NtkHaigStart( Abc_Ntk_t * pNtk ) +{ + Hop_Man_t * p; + Abc_Obj_t * pObj, * pTemp; + int i; + assert( Abc_NtkIsStrash(pNtk) ); + // check if the package is already started + if ( pNtk->pHaig ) + { + Abc_NtkHaigStop( pNtk ); + assert( pNtk->pHaig == NULL ); + printf( "Warning: Previous history AIG was removed.\n" ); + } + // make sure the data is clean + Abc_NtkForEachObj( pNtk, pObj, i ) + assert( pObj->pEquiv == NULL ); + // start the HOP package + p = Hop_ManStart(); + p->vNodes = Vec_PtrAlloc( 4096 ); + Vec_PtrPush( p->vNodes, Hop_ManConst1(p) ); + // map the constant node + Abc_AigConst1(pNtk)->pEquiv = Hop_ManConst1(p); + // map the CIs + Abc_NtkForEachCi( pNtk, pObj, i ) + pObj->pEquiv = Hop_ObjCreatePi(p); + // map the internal nodes + Abc_NtkForEachNode( pNtk, pObj, i ) + pObj->pEquiv = Hop_And( p, Abc_ObjChild0Equiv(pObj), Abc_ObjChild1Equiv(pObj) ); + // map the choice nodes + if ( Abc_NtkGetChoiceNum( pNtk ) ) + { + // print warning about choice nodes + printf( "Warning: The choice nodes in the original AIG are converted into HAIG.\n" ); + Abc_NtkForEachNode( pNtk, pObj, i ) + { + if ( !Abc_AigNodeIsChoice( pObj ) ) + continue; + for ( pTemp = pObj->pData; pTemp; pTemp = pTemp->pData ) + Hop_ObjCreateChoice( pObj->pEquiv, pTemp->pEquiv ); + } + } + // make sure everything is okay + if ( !Hop_ManCheck(p) ) + { + printf( "Abc_NtkHaigStart: Check for History AIG has failed.\n" ); + Hop_ManStop(p); + return 0; + } + pNtk->pHaig = p; + return 1; +} + +/**Function************************************************************* + + Synopsis [Stops history AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Abc_NtkHaigStop( Abc_Ntk_t * pNtk ) +{ + Abc_Obj_t * pObj; + int i; + assert( Abc_NtkIsStrash(pNtk) ); + if ( pNtk->pHaig == NULL ) + { + printf( "Warning: History AIG is not allocated.\n" ); + return 1; + } + Abc_NtkForEachObj( pNtk, pObj, i ) + pObj->pEquiv = NULL; + Hop_ManStop( pNtk->pHaig ); + pNtk->pHaig = NULL; + return 1; +} + +/**Function************************************************************* + + Synopsis [Transfers the HAIG to the new network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Abc_NtkHaigTranfer( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtkNew ) +{ + Abc_Obj_t * pObj; + int i; + if ( pNtkOld->pHaig == NULL ) + return; + // transfer the package + assert( pNtkNew->pHaig == NULL ); + pNtkNew->pHaig = pNtkOld->pHaig; + pNtkOld->pHaig = NULL; + // transfer constant pointer + Abc_AigConst1(pNtkOld)->pCopy->pEquiv = Abc_AigConst1(pNtkOld)->pEquiv; + // transfer the CI pointers + Abc_NtkForEachCi( pNtkOld, pObj, i ) + pObj->pCopy->pEquiv = pObj->pEquiv; +} + + + + +/**Function************************************************************* + + Synopsis [Collects the nodes in the classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Abc_NtkHaigCollectMembers( Hop_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Hop_Obj_t * pObj; + int i; + vNodes = Vec_PtrAlloc( 4098 ); + Vec_PtrForEachEntry( p->vNodes, pObj, i ) + { + if ( pObj->pData == NULL ) + continue; + pObj->pData = Hop_ObjRepr( pObj ); + Vec_PtrPush( vNodes, pObj ); + } + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Creates classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Abc_NtkHaigCreateClasses( Vec_Ptr_t * vMembers ) +{ + Vec_Ptr_t * vClasses; + Hop_Obj_t * pObj, * pRepr; + int i; + + // count classes + vClasses = Vec_PtrAlloc( 4098 ); + Vec_PtrForEachEntry( vMembers, pObj, i ) + { + pRepr = pObj->pData; + assert( pRepr->pData == NULL ); + if ( pRepr->fMarkA == 0 ) // new + { + pRepr->fMarkA = 1; + Vec_PtrPush( vClasses, pRepr ); + } + } + + // set representatives as representatives + Vec_PtrForEachEntry( vClasses, pObj, i ) + { + pObj->fMarkA = 0; + pObj->pData = pObj; + } + + // go through the members and update + Vec_PtrForEachEntry( vMembers, pObj, i ) + { + pRepr = pObj->pData; + if ( ((Hop_Obj_t *)pRepr->pData)->Id > pObj->Id ) + pRepr->pData = pObj; + } + + // change representatives of the class + Vec_PtrForEachEntry( vMembers, pObj, i ) + { + pRepr = pObj->pData; + pObj->pData = pRepr->pData; + assert( ((Hop_Obj_t *)pObj->pData)->Id <= pObj->Id ); + } + + // update classes + Vec_PtrForEachEntry( vClasses, pObj, i ) + { + pRepr = pObj->pData; + assert( pRepr->pData == pRepr ); + pRepr->pData = NULL; + Vec_PtrWriteEntry( vClasses, i, pRepr ); + Vec_PtrPush( vMembers, pObj ); + } +/* + Vec_PtrForEachEntry( vMembers, pObj, i ) + { + printf( "ObjId = %4d : ", pObj->Id ); + if ( pObj->pData == NULL ) + { + printf( "NULL" ); + } + else + { + printf( "%4d", ((Hop_Obj_t *)pObj->pData)->Id ); + assert( ((Hop_Obj_t *)pObj->pData)->Id <= pObj->Id ); + } + printf( "\n" ); + } +*/ + return vClasses; +} + + +/**Function************************************************************* + + Synopsis [Returns 1 if pOld is in the TFI of pNew.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Abc_NtkHaigCheckTfi_rec( Abc_Obj_t * pNode, Abc_Obj_t * pOld ) +{ + if ( pNode == NULL ) + return 0; + if ( pNode == pOld ) + return 1; + // check the trivial cases + if ( Abc_ObjIsPi(pNode) ) + return 0; + assert( Abc_ObjIsNode(pNode) ); + // if this node is already visited, skip + if ( Abc_NodeIsTravIdCurrent( pNode ) ) + return 0; + // mark the node as visited + Abc_NodeSetTravIdCurrent( pNode ); + // check the children + if ( Abc_NtkHaigCheckTfi_rec( Abc_ObjFanin0(pNode), pOld ) ) + return 1; + if ( Abc_NtkHaigCheckTfi_rec( Abc_ObjFanin1(pNode), pOld ) ) + return 1; + // check equivalent nodes + return Abc_NtkHaigCheckTfi_rec( pNode->pData, pOld ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pOld is in the TFI of pNew.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Abc_NtkHaigCheckTfi( Abc_Ntk_t * pNtk, Abc_Obj_t * pOld, Abc_Obj_t * pNew ) +{ + assert( !Abc_ObjIsComplement(pOld) ); + assert( !Abc_ObjIsComplement(pNew) ); + Abc_NtkIncrementTravId(pNtk); + return Abc_NtkHaigCheckTfi_rec( pNew, pOld ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Abc_Obj_t * Hop_ObjReprAbc( Hop_Obj_t * pObj ) +{ + Hop_Obj_t * pRepr; + Abc_Obj_t * pObjAbcThis, * pObjAbcRepr; + assert( pObj->pNext != NULL ); + if ( pObj->pData == NULL ) + return (Abc_Obj_t *)pObj->pNext; + pRepr = pObj->pData; + assert( pRepr->pData == NULL ); + pObjAbcThis = (Abc_Obj_t *)pObj->pNext; + pObjAbcRepr = (Abc_Obj_t *)pRepr->pNext; + assert( !Abc_ObjIsComplement(pObjAbcThis) ); + assert( !Abc_ObjIsComplement(pObjAbcRepr) ); + return Abc_ObjNotCond( pObjAbcRepr, pObjAbcRepr->fPhase ^ pObjAbcThis->fPhase ); +// return (Abc_Obj_t *)pObj->pNext; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Abc_Obj_t * Hop_ObjChild0Abc( Hop_Obj_t * pObj ) { return Abc_ObjNotCond( Hop_ObjReprAbc(Hop_ObjFanin0(pObj)), Hop_ObjFaninC0(pObj) ); } +static inline Abc_Obj_t * Hop_ObjChild1Abc( Hop_Obj_t * pObj ) { return Abc_ObjNotCond( Hop_ObjReprAbc(Hop_ObjFanin1(pObj)), Hop_ObjFaninC1(pObj) ); } + +/**Function************************************************************* + + Synopsis [Stops history AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Abc_Ntk_t * Abc_NtkHaigRecreateAig( Abc_Ntk_t * pNtk, Hop_Man_t * p ) +{ + Abc_Ntk_t * pNtkAig; + Abc_Obj_t * pObjAbcThis, * pObjAbcRepr; + Abc_Obj_t * pObjOld, * pObjNew; + Hop_Obj_t * pObj; + int i; + + assert( p->nCreated == Vec_PtrSize(p->vNodes) ); + assert( Hop_ManPoNum(p) == 0 ); + + // start the new network + pNtkAig = Abc_NtkStartFrom( pNtk, ABC_NTK_STRASH, ABC_FUNC_AIG ); + + // transfer new nodes to the PIs of HOP + Hop_ManConst1(p)->pNext = (Hop_Obj_t *)Abc_AigConst1( pNtkAig ); + Hop_ManForEachPi( p, pObj, i ) + pObj->pNext = (Hop_Obj_t *)Abc_NtkPi( pNtkAig, i ); + + // construct new nodes + Vec_PtrForEachEntry( p->vNodes, pObj, i ) + if ( Hop_ObjIsNode(pObj) ) + pObj->pNext = (Hop_Obj_t *)Abc_AigAnd( pNtkAig->pManFunc, Hop_ObjChild0Abc(pObj), Hop_ObjChild1Abc(pObj) ); + + // set the COs + Abc_NtkForEachCo( pNtk, pObjOld, i ) + { + pObjNew = Hop_ObjReprAbc( Abc_ObjFanin0(pObjOld)->pEquiv ); + pObjNew = Abc_ObjNotCond( pObjNew, Abc_ObjFaninC0(pObjOld) ); + Abc_ObjAddFanin( pObjOld->pCopy, pObjNew ); + } + + // create choice nodes + Vec_PtrForEachEntry( p->vNodes, pObj, i ) + { + Abc_Obj_t * pTemp; + if ( pObj->pData == NULL ) + continue; + + pObjAbcThis = (Abc_Obj_t *)pObj->pNext; + pObjAbcRepr = (Abc_Obj_t *)((Hop_Obj_t *)pObj->pData)->pNext; + assert( !Abc_ObjIsComplement(pObjAbcThis) ); + assert( !Abc_ObjIsComplement(pObjAbcRepr) ); + + // skip the case when the class is constant 1 + if ( pObjAbcRepr == Abc_AigConst1(pNtkAig) ) + continue; + + // skip the case when pObjAbcThis is part of the class already + for ( pTemp = pObjAbcRepr; pTemp; pTemp = pTemp->pData ) + if ( pTemp == pObjAbcThis ) + break; + if ( pTemp ) + continue; + +// assert( Abc_ObjFanoutNum(pObjAbcThis) == 0 ); + if ( Abc_ObjFanoutNum(pObjAbcThis) > 0 ) + continue; +// assert( pObjAbcThis->pData == NULL ); + if ( pObjAbcThis->pData ) + continue; + + // do not create choices if there is a path from pObjAbcThis to pObjAbcRepr + if ( !Abc_NtkHaigCheckTfi( pNtkAig, pObjAbcRepr, pObjAbcThis ) ) + { + // find the last node in the class + while ( pObjAbcRepr->pData ) + pObjAbcRepr = pObjAbcRepr->pData; + // add the new node at the end of the list + pObjAbcRepr->pData = pObjAbcThis; + } + } + + // finish the new network +// Abc_NtkFinalize( pNtk, pNtkAig ); +// Abc_AigCleanup( pNtkAig->pManFunc ); + // check correctness of the network + if ( !Abc_NtkCheck( pNtkAig ) ) + { + printf( "Abc_NtkHaigUse: The network check has failed.\n" ); + Abc_NtkDelete( pNtkAig ); + return NULL; + } + return pNtkAig; +} + +/**Function************************************************************* + + Synopsis [Stops history AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Abc_Ntk_t * Abc_NtkHaigUse( Abc_Ntk_t * pNtk ) +{ + Abc_Ntk_t * pNtkAig; + Vec_Ptr_t * vMembers, * vClasses; + + // check if HAIG is available + assert( Abc_NtkIsStrash(pNtk) ); + if ( pNtk->pHaig == NULL ) + { + printf( "Warning: History AIG is not available.\n" ); + return NULL; + } + // convert HOP package into AIG with choices + + // print HAIG stats +// Hop_ManPrintStats( pNtk->pHaig ); // USES DATA!!! + + // collect members of the classes and make them point to reprs + vMembers = Abc_NtkHaigCollectMembers( pNtk->pHaig ); + printf( "Collected %6d class members.\n", Vec_PtrSize(vMembers) ); + + // create classes + vClasses = Abc_NtkHaigCreateClasses( vMembers ); + printf( "Collected %6d classes. (Ave = %5.2f)\n", Vec_PtrSize(vClasses), + (float)(Vec_PtrSize(vMembers))/Vec_PtrSize(vClasses) ); + Vec_PtrFree( vMembers ); + Vec_PtrFree( vClasses ); + + // traverse in the topological order and create new AIG + pNtkAig = Abc_NtkHaigRecreateAig( pNtk, pNtk->pHaig ); + + // free HAIG + Abc_NtkHaigStop( pNtk ); + return pNtkAig; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |