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Diffstat (limited to 'src/opt/res/resFilter.c')
| -rw-r--r-- | src/opt/res/resFilter.c | 434 |
1 files changed, 0 insertions, 434 deletions
diff --git a/src/opt/res/resFilter.c b/src/opt/res/resFilter.c deleted file mode 100644 index f2ca41d3..00000000 --- a/src/opt/res/resFilter.c +++ /dev/null @@ -1,434 +0,0 @@ -/**CFile**************************************************************** - - FileName [resFilter.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [Resynthesis package.] - - Synopsis [Filtering resubstitution candidates.] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - January 15, 2007.] - - Revision [$Id: resFilter.c,v 1.00 2007/01/15 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "abc.h" -#include "resInt.h" - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -static unsigned * Res_FilterCollectFaninInfo( Res_Win_t * pWin, Res_Sim_t * pSim, unsigned uMask ); -static int Res_FilterCriticalFanin( Abc_Obj_t * pNode ); - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Finds sets of feasible candidates.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Res_FilterCandidates( Res_Win_t * pWin, Abc_Ntk_t * pAig, Res_Sim_t * pSim, Vec_Vec_t * vResubs, Vec_Vec_t * vResubsW, int nFaninsMax, int fArea ) -{ - Abc_Obj_t * pFanin, * pFanin2, * pFaninTemp; - unsigned * pInfo, * pInfoDiv, * pInfoDiv2; - int Counter, RetValue, i, i2, d, d2, iDiv, iDiv2, k; - - // check that the info the node is one - pInfo = Vec_PtrEntry( pSim->vOuts, 1 ); - RetValue = Abc_InfoIsOne( pInfo, pSim->nWordsOut ); - if ( RetValue == 0 ) - { -// printf( "Failed 1!\n" ); - return 0; - } - - // collect the fanin info - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, ~0 ); - RetValue = Abc_InfoIsOne( pInfo, pSim->nWordsOut ); - if ( RetValue == 0 ) - { -// printf( "Failed 2!\n" ); - return 0; - } - - // try removing each fanin -// printf( "Fanins: " ); - Counter = 0; - Vec_VecClear( vResubs ); - Vec_VecClear( vResubsW ); - Abc_ObjForEachFanin( pWin->pNode, pFanin, i ) - { - if ( fArea && Abc_ObjFanoutNum(pFanin) > 1 ) - continue; - // get simulation info without this fanin - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, ~(1 << i) ); - RetValue = Abc_InfoIsOne( pInfo, pSim->nWordsOut ); - if ( RetValue ) - { -// printf( "Node %4d. Candidate fanin %4d.\n", pWin->pNode->Id, pFanin->Id ); - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - Abc_ObjForEachFanin( pWin->pNode, pFaninTemp, k ) - { - if ( k != i ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFaninTemp ); - } - } - Counter++; - if ( Counter == Vec_VecSize(vResubs) ) - return Counter; - } - } - - // try replacing each critical fanin by a non-critical fanin - Abc_ObjForEachFanin( pWin->pNode, pFanin, i ) - { - if ( Abc_ObjFanoutNum(pFanin) > 1 ) - continue; - // get simulation info without this fanin - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, ~(1 << i) ); - // go over the set of divisors - for ( d = Abc_ObjFaninNum(pWin->pNode) + 2; d < Abc_NtkPoNum(pAig); d++ ) - { - pInfoDiv = Vec_PtrEntry( pSim->vOuts, d ); - iDiv = d - (Abc_ObjFaninNum(pWin->pNode) + 2); - if ( !Abc_InfoIsOrOne( pInfo, pInfoDiv, pSim->nWordsOut ) ) - continue; - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - // collect the remaning fanins and the divisor - Abc_ObjForEachFanin( pWin->pNode, pFaninTemp, k ) - { - if ( k != i ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFaninTemp ); - } - } - // collect the divisor - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv) ); - Counter++; - if ( Counter == Vec_VecSize(vResubs) ) - return Counter; - } - } - - // consider the case when two fanins can be added instead of one - if ( Abc_ObjFaninNum(pWin->pNode) < nFaninsMax ) - { - // try to replace each critical fanin by two non-critical fanins - Abc_ObjForEachFanin( pWin->pNode, pFanin, i ) - { - if ( Abc_ObjFanoutNum(pFanin) > 1 ) - continue; - // get simulation info without this fanin - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, ~(1 << i) ); - // go over the set of divisors - for ( d = Abc_ObjFaninNum(pWin->pNode) + 2; d < Abc_NtkPoNum(pAig); d++ ) - { - pInfoDiv = Vec_PtrEntry( pSim->vOuts, d ); - iDiv = d - (Abc_ObjFaninNum(pWin->pNode) + 2); - // go through the second divisor - for ( d2 = d + 1; d2 < Abc_NtkPoNum(pAig); d2++ ) - { - pInfoDiv2 = Vec_PtrEntry( pSim->vOuts, d2 ); - iDiv2 = d2 - (Abc_ObjFaninNum(pWin->pNode) + 2); - if ( !Abc_InfoIsOrOne3( pInfo, pInfoDiv, pInfoDiv2, pSim->nWordsOut ) ) - continue; - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - // collect the remaning fanins and the divisor - Abc_ObjForEachFanin( pWin->pNode, pFaninTemp, k ) - { - if ( k != i ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFaninTemp ); - } - } - // collect the divisor - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d2) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv2) ); - Counter++; - if ( Counter == Vec_VecSize(vResubs) ) - return Counter; - } - } - } - } - - // try to replace two nets by one - if ( !fArea ) - { - Abc_ObjForEachFanin( pWin->pNode, pFanin, i ) - { - for ( i2 = i + 1; i2 < Abc_ObjFaninNum(pWin->pNode); i2++ ) - { - pFanin2 = Abc_ObjFanin(pWin->pNode, i2); - // get simulation info without these fanins - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, (~(1 << i)) & (~(1 << i2)) ); - // go over the set of divisors - for ( d = Abc_ObjFaninNum(pWin->pNode) + 2; d < Abc_NtkPoNum(pAig); d++ ) - { - pInfoDiv = Vec_PtrEntry( pSim->vOuts, d ); - iDiv = d - (Abc_ObjFaninNum(pWin->pNode) + 2); - if ( !Abc_InfoIsOrOne( pInfo, pInfoDiv, pSim->nWordsOut ) ) - continue; - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - // collect the remaning fanins and the divisor - Abc_ObjForEachFanin( pWin->pNode, pFaninTemp, k ) - { - if ( k != i && k != i2 ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFaninTemp ); - } - } - // collect the divisor - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv) ); - Counter++; - if ( Counter == Vec_VecSize(vResubs) ) - return Counter; - } - } - } - } - return Counter; -} - - -/**Function************************************************************* - - Synopsis [Finds sets of feasible candidates.] - - Description [This procedure is a special case of the above.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Res_FilterCandidatesArea( Res_Win_t * pWin, Abc_Ntk_t * pAig, Res_Sim_t * pSim, Vec_Vec_t * vResubs, Vec_Vec_t * vResubsW, int nFaninsMax ) -{ - Abc_Obj_t * pFanin; - unsigned * pInfo, * pInfoDiv, * pInfoDiv2; - int Counter, RetValue, d, d2, k, iDiv, iDiv2, iBest; - - // check that the info the node is one - pInfo = Vec_PtrEntry( pSim->vOuts, 1 ); - RetValue = Abc_InfoIsOne( pInfo, pSim->nWordsOut ); - if ( RetValue == 0 ) - { -// printf( "Failed 1!\n" ); - return 0; - } - - // collect the fanin info - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, ~0 ); - RetValue = Abc_InfoIsOne( pInfo, pSim->nWordsOut ); - if ( RetValue == 0 ) - { -// printf( "Failed 2!\n" ); - return 0; - } - - // try removing fanins -// printf( "Fanins: " ); - Counter = 0; - Vec_VecClear( vResubs ); - Vec_VecClear( vResubsW ); - // get the best fanins - iBest = Res_FilterCriticalFanin( pWin->pNode ); - if ( iBest == -1 ) - return 0; - - // get the info without the critical fanin - pInfo = Res_FilterCollectFaninInfo( pWin, pSim, ~(1 << iBest) ); - RetValue = Abc_InfoIsOne( pInfo, pSim->nWordsOut ); - if ( RetValue ) - { -// printf( "Can be done without one!\n" ); - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - Abc_ObjForEachFanin( pWin->pNode, pFanin, k ) - { - if ( k != iBest ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFanin ); - } - } - Counter++; -// printf( "*" ); - return Counter; - } - - // go through the divisors - for ( d = Abc_ObjFaninNum(pWin->pNode) + 2; d < Abc_NtkPoNum(pAig); d++ ) - { - pInfoDiv = Vec_PtrEntry( pSim->vOuts, d ); - iDiv = d - (Abc_ObjFaninNum(pWin->pNode) + 2); - if ( !Abc_InfoIsOrOne( pInfo, pInfoDiv, pSim->nWordsOut ) ) - continue; -//if ( Abc_ObjLevel(pWin->pNode) <= Abc_ObjLevel( Vec_PtrEntry(pWin->vDivs, iDiv) ) ) -// printf( "Node level = %d. Divisor level = %d.\n", Abc_ObjLevel(pWin->pNode), Abc_ObjLevel( Vec_PtrEntry(pWin->vDivs, iDiv) ) ); - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - // collect the remaning fanins and the divisor - Abc_ObjForEachFanin( pWin->pNode, pFanin, k ) - { - if ( k != iBest ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFanin ); - } - } - // collect the divisor - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv) ); - Counter++; - - if ( Counter == Vec_VecSize(vResubs) ) - break; - } - - if ( Counter > 0 || Abc_ObjFaninNum(pWin->pNode) >= nFaninsMax ) - return Counter; - - // try to find the node pairs - for ( d = Abc_ObjFaninNum(pWin->pNode) + 2; d < Abc_NtkPoNum(pAig); d++ ) - { - pInfoDiv = Vec_PtrEntry( pSim->vOuts, d ); - iDiv = d - (Abc_ObjFaninNum(pWin->pNode) + 2); - // go through the second divisor - for ( d2 = d + 1; d2 < Abc_NtkPoNum(pAig); d2++ ) - { - pInfoDiv2 = Vec_PtrEntry( pSim->vOuts, d2 ); - iDiv2 = d2 - (Abc_ObjFaninNum(pWin->pNode) + 2); - - if ( !Abc_InfoIsOrOne3( pInfo, pInfoDiv, pInfoDiv2, pSim->nWordsOut ) ) - continue; - // collect the nodes - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,0) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,1) ); - // collect the remaning fanins and the divisor - Abc_ObjForEachFanin( pWin->pNode, pFanin, k ) - { - if ( k != iBest ) - { - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,2+k) ); - Vec_VecPush( vResubsW, Counter, pFanin ); - } - } - // collect the divisor - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d) ); - Vec_VecPush( vResubs, Counter, Abc_NtkPo(pAig,d2) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv) ); - Vec_VecPush( vResubsW, Counter, Vec_PtrEntry(pWin->vDivs, iDiv2) ); - Counter++; - - if ( Counter == Vec_VecSize(vResubs) ) - break; - } - if ( Counter == Vec_VecSize(vResubs) ) - break; - } - return Counter; -} - - -/**Function************************************************************* - - Synopsis [Finds sets of feasible candidates.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -unsigned * Res_FilterCollectFaninInfo( Res_Win_t * pWin, Res_Sim_t * pSim, unsigned uMask ) -{ - Abc_Obj_t * pFanin; - unsigned * pInfo; - int i; - pInfo = Vec_PtrEntry( pSim->vOuts, 0 ); - Abc_InfoClear( pInfo, pSim->nWordsOut ); - Abc_ObjForEachFanin( pWin->pNode, pFanin, i ) - { - if ( uMask & (1 << i) ) - Abc_InfoOr( pInfo, Vec_PtrEntry(pSim->vOuts, 2+i), pSim->nWordsOut ); - } - return pInfo; -} - - -/**Function************************************************************* - - Synopsis [Returns the index of the most critical fanin.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Res_FilterCriticalFanin( Abc_Obj_t * pNode ) -{ - Abc_Obj_t * pFanin; - int i, iBest = -1, CostMax = 0, CostCur; - Abc_ObjForEachFanin( pNode, pFanin, i ) - { - if ( !Abc_ObjIsNode(pFanin) ) - continue; - if ( Abc_ObjFanoutNum(pFanin) > 1 ) - continue; - CostCur = Res_WinVisitMffc( pFanin ); - if ( CostMax < CostCur ) - { - CostMax = CostCur; - iBest = i; - } - } -// if ( CostMax > 0 ) -// printf( "<%d>", CostMax ); - return iBest; -} - - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - |