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Diffstat (limited to 'abc70930/src/aig/ivy/ivyCut.c')
| -rw-r--r-- | abc70930/src/aig/ivy/ivyCut.c | 989 |
1 files changed, 0 insertions, 989 deletions
diff --git a/abc70930/src/aig/ivy/ivyCut.c b/abc70930/src/aig/ivy/ivyCut.c deleted file mode 100644 index e257d8a6..00000000 --- a/abc70930/src/aig/ivy/ivyCut.c +++ /dev/null @@ -1,989 +0,0 @@ -/**CFile**************************************************************** - - FileName [ivyCut.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [And-Inverter Graph package.] - - Synopsis [Computes reconvergence driven sequential cut.] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - May 11, 2006.] - - Revision [$Id: ivyCut.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "ivy.h" - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -static inline int Ivy_NodeCutHashValue( int NodeId ) { return 1 << (NodeId % 31); } - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Evaluate the cost of removing the node from the set of leaves.] - - Description [Returns the number of new leaves that will be brought in. - Returns large number if the node cannot be removed from the set of leaves.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline int Ivy_NodeGetLeafCostOne( Ivy_Man_t * p, int Leaf, Vec_Int_t * vInside ) -{ - Ivy_Obj_t * pNode; - int nLatches, FaninLeaf, Cost; - // make sure leaf is not a contant node - assert( Leaf > 0 ); - // get the node - pNode = Ivy_ManObj( p, Ivy_LeafId(Leaf) ); - // cannot expand over the PI node - if ( Ivy_ObjIsPi(pNode) || Ivy_ObjIsConst1(pNode) ) - return 999; - // get the number of latches - nLatches = Ivy_LeafLat(Leaf) + Ivy_ObjIsLatch(pNode); - if ( nLatches > 15 ) - return 999; - // get the first fanin - FaninLeaf = Ivy_LeafCreate( Ivy_ObjFaninId0(pNode), nLatches ); - Cost = FaninLeaf && (Vec_IntFind(vInside, FaninLeaf) == -1); - // quit if this is the one fanin node - if ( Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ) - return Cost; - assert( Ivy_ObjIsNode(pNode) ); - // get the second fanin - FaninLeaf = Ivy_LeafCreate( Ivy_ObjFaninId1(pNode), nLatches ); - Cost += FaninLeaf && (Vec_IntFind(vInside, FaninLeaf) == -1); - return Cost; -} - -/**Function************************************************************* - - Synopsis [Builds reconvergence-driven cut by changing one leaf at a time.] - - Description [This procedure looks at the current leaves and tries to change - one leaf at a time in such a way that the cut grows as little as possible. - In evaluating the fanins, this procedure looks only at their immediate - predecessors (this is why it is called a one-level construction procedure).] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Ivy_ManSeqFindCut_int( Ivy_Man_t * p, Vec_Int_t * vFront, Vec_Int_t * vInside, int nSizeLimit ) -{ - Ivy_Obj_t * pNode; - int CostBest, CostCur, Leaf, LeafBest, Next, nLatches, i; - int LeavesBest[10]; - int Counter; - - // add random selection of the best fanin!!! - - // find the best fanin - CostBest = 99; - LeafBest = -1; - Counter = -1; -//printf( "Evaluating fanins of the cut:\n" ); - Vec_IntForEachEntry( vFront, Leaf, i ) - { - CostCur = Ivy_NodeGetLeafCostOne( p, Leaf, vInside ); -//printf( " Fanin %s has cost %d.\n", Ivy_ObjName(pNode), CostCur ); - if ( CostBest > CostCur ) - { - CostBest = CostCur; - LeafBest = Leaf; - LeavesBest[0] = Leaf; - Counter = 1; - } - else if ( CostBest == CostCur ) - LeavesBest[Counter++] = Leaf; - - if ( CostBest <= 1 ) // can be if ( CostBest <= 1 ) - break; - } - if ( CostBest == 99 ) - return 0; -// return Ivy_NodeBuildCutLevelTwo_int( vInside, vFront, nFaninLimit ); - - assert( CostBest < 3 ); - if ( Vec_IntSize(vFront) - 1 + CostBest > nSizeLimit ) - return 0; -// return Ivy_NodeBuildCutLevelTwo_int( vInside, vFront, nFaninLimit ); - - assert( Counter > 0 ); -printf( "%d", Counter ); - - LeafBest = LeavesBest[rand() % Counter]; - - // remove the node from the array - assert( LeafBest >= 0 ); - Vec_IntRemove( vFront, LeafBest ); -//printf( "Removing fanin %s.\n", Ivy_ObjName(pNode) ); - - // get the node and its latches - pNode = Ivy_ManObj( p, Ivy_LeafId(LeafBest) ); - nLatches = Ivy_LeafLat(LeafBest) + Ivy_ObjIsLatch(pNode); - assert( Ivy_ObjIsNode(pNode) || Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ); - - // add the left child to the fanins - Next = Ivy_LeafCreate( Ivy_ObjFaninId0(pNode), nLatches ); - if ( Next && Vec_IntFind(vInside, Next) == -1 ) - { -//printf( "Adding fanin %s.\n", Ivy_ObjName(pNext) ); - Vec_IntPush( vFront, Next ); - Vec_IntPush( vInside, Next ); - } - - // quit if this is the one fanin node - if ( Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ) - return 1; - assert( Ivy_ObjIsNode(pNode) ); - - // add the right child to the fanins - Next = Ivy_LeafCreate( Ivy_ObjFaninId1(pNode), nLatches ); - if ( Next && Vec_IntFind(vInside, Next) == -1 ) - { -//printf( "Adding fanin %s.\n", Ivy_ObjName(pNext) ); - Vec_IntPush( vFront, Next ); - Vec_IntPush( vInside, Next ); - } - assert( Vec_IntSize(vFront) <= nSizeLimit ); - // keep doing this - return 1; -} - -/**Function************************************************************* - - Synopsis [Computes one sequential cut of the given size.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Ivy_ManSeqFindCut( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Int_t * vFront, Vec_Int_t * vInside, int nSize ) -{ - assert( !Ivy_IsComplement(pRoot) ); - assert( Ivy_ObjIsNode(pRoot) ); - assert( Ivy_ObjFaninId0(pRoot) ); - assert( Ivy_ObjFaninId1(pRoot) ); - - // start the cut - Vec_IntClear( vFront ); - Vec_IntPush( vFront, Ivy_LeafCreate(Ivy_ObjFaninId0(pRoot), 0) ); - Vec_IntPush( vFront, Ivy_LeafCreate(Ivy_ObjFaninId1(pRoot), 0) ); - - // start the visited nodes - Vec_IntClear( vInside ); - Vec_IntPush( vInside, Ivy_LeafCreate(pRoot->Id, 0) ); - Vec_IntPush( vInside, Ivy_LeafCreate(Ivy_ObjFaninId0(pRoot), 0) ); - Vec_IntPush( vInside, Ivy_LeafCreate(Ivy_ObjFaninId1(pRoot), 0) ); - - // compute the cut - while ( Ivy_ManSeqFindCut_int( p, vFront, vInside, nSize ) ); - assert( Vec_IntSize(vFront) <= nSize ); -} - - - - - -/**Function************************************************************* - - Synopsis [Computing Boolean cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Ivy_ManFindBoolCut_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vVolume, Ivy_Obj_t * pPivot ) -{ - int RetValue0, RetValue1; - if ( pObj == pPivot ) - { - Vec_PtrPushUnique( vLeaves, pObj ); - Vec_PtrPushUnique( vVolume, pObj ); - return 1; - } - if ( pObj->fMarkA ) - return 0; - -// assert( !Ivy_ObjIsCi(pObj) ); - if ( Ivy_ObjIsCi(pObj) ) - return 0; - - if ( Ivy_ObjIsBuf(pObj) ) - { - RetValue0 = Ivy_ManFindBoolCut_rec( p, Ivy_ObjFanin0(pObj), vLeaves, vVolume, pPivot ); - if ( !RetValue0 ) - return 0; - Vec_PtrPushUnique( vVolume, pObj ); - return 1; - } - assert( Ivy_ObjIsNode(pObj) ); - RetValue0 = Ivy_ManFindBoolCut_rec( p, Ivy_ObjFanin0(pObj), vLeaves, vVolume, pPivot ); - RetValue1 = Ivy_ManFindBoolCut_rec( p, Ivy_ObjFanin1(pObj), vLeaves, vVolume, pPivot ); - if ( !RetValue0 && !RetValue1 ) - return 0; - // add new leaves - if ( !RetValue0 ) - { - Vec_PtrPushUnique( vLeaves, Ivy_ObjFanin0(pObj) ); - Vec_PtrPushUnique( vVolume, Ivy_ObjFanin0(pObj) ); - } - if ( !RetValue1 ) - { - Vec_PtrPushUnique( vLeaves, Ivy_ObjFanin1(pObj) ); - Vec_PtrPushUnique( vVolume, Ivy_ObjFanin1(pObj) ); - } - Vec_PtrPushUnique( vVolume, pObj ); - return 1; -} - -/**Function************************************************************* - - Synopsis [Returns the cost of one node (how many new nodes are added.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Ivy_ManFindBoolCutCost( Ivy_Obj_t * pObj ) -{ - int Cost; - // make sure the node is in the construction zone - assert( pObj->fMarkA == 1 ); - // cannot expand over the PI node - if ( Ivy_ObjIsCi(pObj) ) - return 999; - // always expand over the buffer - if ( Ivy_ObjIsBuf(pObj) ) - return !Ivy_ObjFanin0(pObj)->fMarkA; - // get the cost of the cone - Cost = (!Ivy_ObjFanin0(pObj)->fMarkA) + (!Ivy_ObjFanin1(pObj)->fMarkA); - // return the number of nodes to be added to the leaves if this node is removed - return Cost; -} - -/**Function************************************************************* - - Synopsis [Computing Boolean cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Ivy_ManFindBoolCut( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Ptr_t * vFront, Vec_Ptr_t * vVolume, Vec_Ptr_t * vLeaves ) -{ - Ivy_Obj_t * pObj, * pFaninC, * pFanin0, * pFanin1, * pPivot; - int RetValue, LevelLimit, Lev, k; - assert( !Ivy_IsComplement(pRoot) ); - // clear the frontier and collect the nodes - Vec_PtrClear( vFront ); - Vec_PtrClear( vVolume ); - if ( Ivy_ObjIsMuxType(pRoot) ) - pFaninC = Ivy_ObjRecognizeMux( pRoot, &pFanin0, &pFanin1 ); - else - { - pFaninC = NULL; - pFanin0 = Ivy_ObjFanin0(pRoot); - pFanin1 = Ivy_ObjFanin1(pRoot); - } - // start cone A - pFanin0->fMarkA = 1; - Vec_PtrPush( vFront, pFanin0 ); - Vec_PtrPush( vVolume, pFanin0 ); - // start cone B - pFanin1->fMarkB = 1; - Vec_PtrPush( vFront, pFanin1 ); - Vec_PtrPush( vVolume, pFanin1 ); - // iteratively expand until the common node (pPivot) is found or limit is reached - assert( Ivy_ObjLevel(pRoot) == Ivy_ObjLevelNew(pRoot) ); - pPivot = NULL; - LevelLimit = IVY_MAX( Ivy_ObjLevel(pRoot) - 10, 1 ); - for ( Lev = Ivy_ObjLevel(pRoot) - 1; Lev >= LevelLimit; Lev-- ) - { - while ( 1 ) - { - // find the next node to expand on this level - Vec_PtrForEachEntry( vFront, pObj, k ) - if ( (int)pObj->Level == Lev ) - break; - if ( k == Vec_PtrSize(vFront) ) - break; - assert( (int)pObj->Level <= Lev ); - assert( pObj->fMarkA ^ pObj->fMarkB ); - // remove the old node - Vec_PtrRemove( vFront, pObj ); - - // expand this node - pFanin0 = Ivy_ObjFanin0(pObj); - if ( !pFanin0->fMarkA && !pFanin0->fMarkB ) - { - Vec_PtrPush( vFront, pFanin0 ); - Vec_PtrPush( vVolume, pFanin0 ); - } - // mark the new nodes - if ( pObj->fMarkA ) - pFanin0->fMarkA = 1; - if ( pObj->fMarkB ) - pFanin0->fMarkB = 1; - - if ( Ivy_ObjIsBuf(pObj) ) - { - if ( pFanin0->fMarkA && pFanin0->fMarkB ) - { - pPivot = pFanin0; - break; - } - continue; - } - - // expand this node - pFanin1 = Ivy_ObjFanin1(pObj); - if ( !pFanin1->fMarkA && !pFanin1->fMarkB ) - { - Vec_PtrPush( vFront, pFanin1 ); - Vec_PtrPush( vVolume, pFanin1 ); - } - // mark the new nodes - if ( pObj->fMarkA ) - pFanin1->fMarkA = 1; - if ( pObj->fMarkB ) - pFanin1->fMarkB = 1; - - // consider if it is time to quit - if ( pFanin0->fMarkA && pFanin0->fMarkB ) - { - pPivot = pFanin0; - break; - } - if ( pFanin1->fMarkA && pFanin1->fMarkB ) - { - pPivot = pFanin1; - break; - } - } - if ( pPivot != NULL ) - break; - } - if ( pPivot == NULL ) - return 0; - // if the MUX control is defined, it should not be - if ( pFaninC && !pFaninC->fMarkA && !pFaninC->fMarkB ) - Vec_PtrPush( vFront, pFaninC ); - // clean the markings - Vec_PtrForEachEntry( vVolume, pObj, k ) - pObj->fMarkA = pObj->fMarkB = 0; - - // mark the nodes on the frontier (including the pivot) - Vec_PtrForEachEntry( vFront, pObj, k ) - pObj->fMarkA = 1; - // cut exists, collect all the nodes on the shortest path to the pivot - Vec_PtrClear( vLeaves ); - Vec_PtrClear( vVolume ); - RetValue = Ivy_ManFindBoolCut_rec( p, pRoot, vLeaves, vVolume, pPivot ); - assert( RetValue == 1 ); - // unmark the nodes on the frontier (including the pivot) - Vec_PtrForEachEntry( vFront, pObj, k ) - pObj->fMarkA = 0; - - // mark the nodes in the volume - Vec_PtrForEachEntry( vVolume, pObj, k ) - pObj->fMarkA = 1; - // expand the cut without increasing its size - while ( 1 ) - { - Vec_PtrForEachEntry( vLeaves, pObj, k ) - if ( Ivy_ManFindBoolCutCost(pObj) < 2 ) - break; - if ( k == Vec_PtrSize(vLeaves) ) - break; - // the node can be expanded - // remove the old node - Vec_PtrRemove( vLeaves, pObj ); - // expand this node - pFanin0 = Ivy_ObjFanin0(pObj); - if ( !pFanin0->fMarkA ) - { - pFanin0->fMarkA = 1; - Vec_PtrPush( vVolume, pFanin0 ); - Vec_PtrPush( vLeaves, pFanin0 ); - } - if ( Ivy_ObjIsBuf(pObj) ) - continue; - // expand this node - pFanin1 = Ivy_ObjFanin1(pObj); - if ( !pFanin1->fMarkA ) - { - pFanin1->fMarkA = 1; - Vec_PtrPush( vVolume, pFanin1 ); - Vec_PtrPush( vLeaves, pFanin1 ); - } - } - // unmark the nodes in the volume - Vec_PtrForEachEntry( vVolume, pObj, k ) - pObj->fMarkA = 0; - return 1; -} - - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Ivy_ManTestCutsBool( Ivy_Man_t * p ) -{ - Vec_Ptr_t * vFront, * vVolume, * vLeaves; - Ivy_Obj_t * pObj;//, * pTemp; - int i, RetValue;//, k; - vFront = Vec_PtrAlloc( 100 ); - vVolume = Vec_PtrAlloc( 100 ); - vLeaves = Vec_PtrAlloc( 100 ); - Ivy_ManForEachObj( p, pObj, i ) - { - if ( !Ivy_ObjIsNode(pObj) ) - continue; - if ( Ivy_ObjIsMuxType(pObj) ) - { - printf( "m" ); - continue; - } - if ( Ivy_ObjIsExor(pObj) ) - printf( "x" ); - RetValue = Ivy_ManFindBoolCut( p, pObj, vFront, vVolume, vLeaves ); - if ( RetValue == 0 ) - printf( "- " ); - else - printf( "%d ", Vec_PtrSize(vLeaves) ); -/* - printf( "( " ); - Vec_PtrForEachEntry( vFront, pTemp, k ) - printf( "%d ", Ivy_ObjRefs(Ivy_Regular(pTemp)) ); - printf( ")\n" ); -*/ - } - printf( "\n" ); - Vec_PtrFree( vFront ); - Vec_PtrFree( vVolume ); - Vec_PtrFree( vLeaves ); -} - - - -/**Function************************************************************* - - Synopsis [Find the hash value of the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline unsigned Ivy_NodeCutHash( Ivy_Cut_t * pCut ) -{ - int i; -// for ( i = 1; i < pCut->nSize; i++ ) -// assert( pCut->pArray[i-1] < pCut->pArray[i] ); - pCut->uHash = 0; - for ( i = 0; i < pCut->nSize; i++ ) - pCut->uHash |= (1 << (pCut->pArray[i] % 31)); - return pCut->uHash; -} - -/**Function************************************************************* - - Synopsis [Removes one node to the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline void Ivy_NodeCutShrink( Ivy_Cut_t * pCut, int iOld ) -{ - int i, k; - for ( i = k = 0; i < pCut->nSize; i++ ) - if ( pCut->pArray[i] != iOld ) - pCut->pArray[k++] = pCut->pArray[i]; - assert( k == pCut->nSize - 1 ); - pCut->nSize--; -} - -/**Function************************************************************* - - Synopsis [Adds one node to the cut.] - - Description [Returns 1 if the cuts is still okay.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline int Ivy_NodeCutExtend( Ivy_Cut_t * pCut, int iNew ) -{ - int i; - for ( i = 0; i < pCut->nSize; i++ ) - if ( pCut->pArray[i] == iNew ) - return 1; - // check if there is room - if ( pCut->nSize == pCut->nSizeMax ) - return 0; - // add the new one - for ( i = pCut->nSize - 1; i >= 0; i-- ) - if ( pCut->pArray[i] > iNew ) - pCut->pArray[i+1] = pCut->pArray[i]; - else - { - assert( pCut->pArray[i] < iNew ); - break; - } - pCut->pArray[i+1] = iNew; - pCut->nSize++; - return 1; -} - -/**Function************************************************************* - - Synopsis [Returns 1 if the cut can be constructed; 0 otherwise.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline int Ivy_NodeCutPrescreen( Ivy_Cut_t * pCut, int Id0, int Id1 ) -{ - int i; - if ( pCut->nSize < pCut->nSizeMax ) - return 1; - for ( i = 0; i < pCut->nSize; i++ ) - if ( pCut->pArray[i] == Id0 || pCut->pArray[i] == Id1 ) - return 1; - return 0; -} - -/**Function************************************************************* - - Synopsis [Derives new cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline int Ivy_NodeCutDeriveNew( Ivy_Cut_t * pCut, Ivy_Cut_t * pCutNew, int IdOld, int IdNew0, int IdNew1 ) -{ - unsigned uHash = 0; - int i, k; - assert( pCut->nSize > 0 ); - assert( IdNew0 < IdNew1 ); - for ( i = k = 0; i < pCut->nSize; i++ ) - { - if ( pCut->pArray[i] == IdOld ) - continue; - if ( IdNew0 <= pCut->pArray[i] ) - { - if ( IdNew0 < pCut->pArray[i] ) - { - pCutNew->pArray[ k++ ] = IdNew0; - uHash |= Ivy_NodeCutHashValue( IdNew0 ); - } - IdNew0 = 0x7FFFFFFF; - } - if ( IdNew1 <= pCut->pArray[i] ) - { - if ( IdNew1 < pCut->pArray[i] ) - { - pCutNew->pArray[ k++ ] = IdNew1; - uHash |= Ivy_NodeCutHashValue( IdNew1 ); - } - IdNew1 = 0x7FFFFFFF; - } - pCutNew->pArray[ k++ ] = pCut->pArray[i]; - uHash |= Ivy_NodeCutHashValue( pCut->pArray[i] ); - } - if ( IdNew0 < 0x7FFFFFFF ) - { - pCutNew->pArray[ k++ ] = IdNew0; - uHash |= Ivy_NodeCutHashValue( IdNew0 ); - } - if ( IdNew1 < 0x7FFFFFFF ) - { - pCutNew->pArray[ k++ ] = IdNew1; - uHash |= Ivy_NodeCutHashValue( IdNew1 ); - } - pCutNew->nSize = k; - pCutNew->uHash = uHash; - assert( pCutNew->nSize <= pCut->nSizeMax ); -// for ( i = 1; i < pCutNew->nSize; i++ ) -// assert( pCutNew->pArray[i-1] < pCutNew->pArray[i] ); - return 1; -} - -/**Function************************************************************* - - Synopsis [Check if the cut exists.] - - Description [Returns 1 if the cut exists.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Ivy_NodeCutFindOrAdd( Ivy_Store_t * pCutStore, Ivy_Cut_t * pCutNew ) -{ - Ivy_Cut_t * pCut; - int i, k; - assert( pCutNew->uHash ); - // try to find the cut - for ( i = 0; i < pCutStore->nCuts; i++ ) - { - pCut = pCutStore->pCuts + i; - if ( pCut->uHash == pCutNew->uHash && pCut->nSize == pCutNew->nSize ) - { - for ( k = 0; k < pCutNew->nSize; k++ ) - if ( pCut->pArray[k] != pCutNew->pArray[k] ) - break; - if ( k == pCutNew->nSize ) - return 1; - } - } - assert( pCutStore->nCuts < pCutStore->nCutsMax ); - // add the cut - pCut = pCutStore->pCuts + pCutStore->nCuts++; - *pCut = *pCutNew; - return 0; -} - -/**Function************************************************************* - - Synopsis [Returns 1 if pDom is contained in pCut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline int Ivy_CutCheckDominance( Ivy_Cut_t * pDom, Ivy_Cut_t * pCut ) -{ - int i, k; - for ( i = 0; i < pDom->nSize; i++ ) - { - for ( k = 0; k < pCut->nSize; k++ ) - if ( pDom->pArray[i] == pCut->pArray[k] ) - break; - if ( k == pCut->nSize ) // node i in pDom is not contained in pCut - return 0; - } - // every node in pDom is contained in pCut - return 1; -} - -/**Function************************************************************* - - Synopsis [Check if the cut exists.] - - Description [Returns 1 if the cut exists.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Ivy_NodeCutFindOrAddFilter( Ivy_Store_t * pCutStore, Ivy_Cut_t * pCutNew ) -{ - Ivy_Cut_t * pCut; - int i, k; - assert( pCutNew->uHash ); - // try to find the cut - for ( i = 0; i < pCutStore->nCuts; i++ ) - { - pCut = pCutStore->pCuts + i; - if ( pCut->nSize == 0 ) - continue; - if ( pCut->nSize == pCutNew->nSize ) - { - if ( pCut->uHash == pCutNew->uHash ) - { - for ( k = 0; k < pCutNew->nSize; k++ ) - if ( pCut->pArray[k] != pCutNew->pArray[k] ) - break; - if ( k == pCutNew->nSize ) - return 1; - } - continue; - } - if ( pCut->nSize < pCutNew->nSize ) - { - // skip the non-contained cuts - if ( (pCut->uHash & pCutNew->uHash) != pCut->uHash ) - continue; - // check containment seriously - if ( Ivy_CutCheckDominance( pCut, pCutNew ) ) - return 1; - continue; - } - // check potential containment of other cut - - // skip the non-contained cuts - if ( (pCut->uHash & pCutNew->uHash) != pCutNew->uHash ) - continue; - // check containment seriously - if ( Ivy_CutCheckDominance( pCutNew, pCut ) ) - { - // remove the current cut -// --pCutStore->nCuts; -// for ( k = i; k < pCutStore->nCuts; k++ ) -// pCutStore->pCuts[k] = pCutStore->pCuts[k+1]; -// i--; - pCut->nSize = 0; - } - } - assert( pCutStore->nCuts < pCutStore->nCutsMax ); - // add the cut - pCut = pCutStore->pCuts + pCutStore->nCuts++; - *pCut = *pCutNew; - return 0; -} - -/**Function************************************************************* - - Synopsis [Print the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Ivy_NodeCompactCuts( Ivy_Store_t * pCutStore ) -{ - Ivy_Cut_t * pCut; - int i, k; - for ( i = k = 0; i < pCutStore->nCuts; i++ ) - { - pCut = pCutStore->pCuts + i; - if ( pCut->nSize == 0 ) - continue; - pCutStore->pCuts[k++] = *pCut; - } - pCutStore->nCuts = k; -} - -/**Function************************************************************* - - Synopsis [Print the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Ivy_NodePrintCut( Ivy_Cut_t * pCut ) -{ - int i; - assert( pCut->nSize > 0 ); - printf( "%d : {", pCut->nSize ); - for ( i = 0; i < pCut->nSize; i++ ) - printf( " %d", pCut->pArray[i] ); - printf( " }\n" ); -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Ivy_NodePrintCuts( Ivy_Store_t * pCutStore ) -{ - int i; - printf( "Node %d\n", pCutStore->pCuts[0].pArray[0] ); - for ( i = 0; i < pCutStore->nCuts; i++ ) - Ivy_NodePrintCut( pCutStore->pCuts + i ); -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline Ivy_Obj_t * Ivy_ObjRealFanin( Ivy_Obj_t * pObj ) -{ - if ( !Ivy_ObjIsBuf(pObj) ) - return pObj; - return Ivy_ObjRealFanin( Ivy_ObjFanin0(pObj) ); -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Ivy_Store_t * Ivy_NodeFindCutsAll( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves ) -{ - static Ivy_Store_t CutStore, * pCutStore = &CutStore; - Ivy_Cut_t CutNew, * pCutNew = &CutNew, * pCut; - Ivy_Obj_t * pLeaf; - int i, k, iLeaf0, iLeaf1; - - assert( nLeaves <= IVY_CUT_INPUT ); - - // start the structure - pCutStore->nCuts = 0; - pCutStore->nCutsMax = IVY_CUT_LIMIT; - // start the trivial cut - pCutNew->uHash = 0; - pCutNew->nSize = 1; - pCutNew->nSizeMax = nLeaves; - pCutNew->pArray[0] = pObj->Id; - Ivy_NodeCutHash( pCutNew ); - // add the trivial cut - Ivy_NodeCutFindOrAdd( pCutStore, pCutNew ); - assert( pCutStore->nCuts == 1 ); - - // explore the cuts - for ( i = 0; i < pCutStore->nCuts; i++ ) - { - // expand this cut - pCut = pCutStore->pCuts + i; - if ( pCut->nSize == 0 ) - continue; - for ( k = 0; k < pCut->nSize; k++ ) - { - pLeaf = Ivy_ManObj( p, pCut->pArray[k] ); - if ( Ivy_ObjIsCi(pLeaf) ) - continue; -/* - *pCutNew = *pCut; - Ivy_NodeCutShrink( pCutNew, pLeaf->Id ); - if ( !Ivy_NodeCutExtend( pCutNew, Ivy_ObjFaninId0(pLeaf) ) ) - continue; - if ( Ivy_ObjIsNode(pLeaf) && !Ivy_NodeCutExtend( pCutNew, Ivy_ObjFaninId1(pLeaf) ) ) - continue; - Ivy_NodeCutHash( pCutNew ); -*/ - iLeaf0 = Ivy_ObjId( Ivy_ObjRealFanin(Ivy_ObjFanin0(pLeaf)) ); - iLeaf1 = Ivy_ObjId( Ivy_ObjRealFanin(Ivy_ObjFanin1(pLeaf)) ); -// if ( iLeaf0 == iLeaf1 ) // strange situation observed on Jan 18, 2007 -// continue; - if ( !Ivy_NodeCutPrescreen( pCut, iLeaf0, iLeaf1 ) ) - continue; - if ( iLeaf0 > iLeaf1 ) - Ivy_NodeCutDeriveNew( pCut, pCutNew, pCut->pArray[k], iLeaf1, iLeaf0 ); - else - Ivy_NodeCutDeriveNew( pCut, pCutNew, pCut->pArray[k], iLeaf0, iLeaf1 ); - Ivy_NodeCutFindOrAddFilter( pCutStore, pCutNew ); - if ( pCutStore->nCuts == IVY_CUT_LIMIT ) - break; - } - if ( pCutStore->nCuts == IVY_CUT_LIMIT ) - break; - } - Ivy_NodeCompactCuts( pCutStore ); -// Ivy_NodePrintCuts( pCutStore ); - return pCutStore; -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Ivy_ManTestCutsAll( Ivy_Man_t * p ) -{ - Ivy_Obj_t * pObj; - int i, nCutsCut, nCutsTotal, nNodeTotal, nNodeOver; - int clk = clock(); - nNodeTotal = nNodeOver = 0; - nCutsTotal = -Ivy_ManNodeNum(p); - Ivy_ManForEachObj( p, pObj, i ) - { - if ( !Ivy_ObjIsNode(pObj) ) - continue; - nCutsCut = Ivy_NodeFindCutsAll( p, pObj, 5 )->nCuts; - nCutsTotal += nCutsCut; - nNodeOver += (nCutsCut == IVY_CUT_LIMIT); - nNodeTotal++; - } - printf( "Total cuts = %6d. Trivial = %6d. Nodes = %6d. Satur = %6d. ", - nCutsTotal, Ivy_ManPiNum(p) + Ivy_ManNodeNum(p), nNodeTotal, nNodeOver ); - PRT( "Time", clock() - clk ); -} - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - |