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author | Alan Mishchenko <alanmi@berkeley.edu> | 2008-01-30 08:01:00 -0800 |
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committer | Alan Mishchenko <alanmi@berkeley.edu> | 2008-01-30 08:01:00 -0800 |
commit | 4d30a1e4f1edecff86d5066ce4653a370e59e5e1 (patch) | |
tree | 366355938a4af0a92f848841ac65374f338d691b /src/aig/fra/fraClass.c | |
parent | 6537f941887b06e588d3acfc97b5fdf48875cc4e (diff) | |
download | abc-4d30a1e4f1edecff86d5066ce4653a370e59e5e1.tar.gz abc-4d30a1e4f1edecff86d5066ce4653a370e59e5e1.tar.bz2 abc-4d30a1e4f1edecff86d5066ce4653a370e59e5e1.zip |
Version abc80130
Diffstat (limited to 'src/aig/fra/fraClass.c')
-rw-r--r-- | src/aig/fra/fraClass.c | 855 |
1 files changed, 0 insertions, 855 deletions
diff --git a/src/aig/fra/fraClass.c b/src/aig/fra/fraClass.c deleted file mode 100644 index 2d03e65d..00000000 --- a/src/aig/fra/fraClass.c +++ /dev/null @@ -1,855 +0,0 @@ -/**CFile**************************************************************** - - FileName [fraClass.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [New FRAIG package.] - - Synopsis [] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - June 30, 2007.] - - Revision [$Id: fraClass.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "fra.h" - -/* - The candidate equivalence classes are stored as a vector of pointers - to the array of pointers to the nodes in each class. - The first node of the class is its representative node. - The representative has the smallest topological order among the class nodes. - The nodes inside each class are ordered according to their topological order. - The classes are ordered according to the topological order of their representatives. - The array of pointers to the class nodes is terminated with a NULL pointer. - To enable dynamic addition of new classes (during class refinement), - each array has at least as many NULLs in the end, as there are nodes in the class. -*/ - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -static inline Aig_Obj_t * Fra_ObjNext( Aig_Obj_t ** ppNexts, Aig_Obj_t * pObj ) { return ppNexts[pObj->Id]; } -static inline void Fra_ObjSetNext( Aig_Obj_t ** ppNexts, Aig_Obj_t * pObj, Aig_Obj_t * pNext ) { ppNexts[pObj->Id] = pNext; } - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Starts representation of equivalence classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Fra_Cla_t * Fra_ClassesStart( Aig_Man_t * pAig ) -{ - Fra_Cla_t * p; - p = ALLOC( Fra_Cla_t, 1 ); - memset( p, 0, sizeof(Fra_Cla_t) ); - p->pAig = pAig; - p->pMemRepr = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(pAig) ); - memset( p->pMemRepr, 0, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(pAig) ); - p->vClasses = Vec_PtrAlloc( 100 ); - p->vClasses1 = Vec_PtrAlloc( 100 ); - p->vClassesTemp = Vec_PtrAlloc( 100 ); - p->vClassOld = Vec_PtrAlloc( 100 ); - p->vClassNew = Vec_PtrAlloc( 100 ); - p->pFuncNodeHash = Fra_SmlNodeHash; - p->pFuncNodeIsConst = Fra_SmlNodeIsConst; - p->pFuncNodesAreEqual = Fra_SmlNodesAreEqual; - return p; -} - -/**Function************************************************************* - - Synopsis [Stop representation of equivalence classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesStop( Fra_Cla_t * p ) -{ - FREE( p->pMemClasses ); - FREE( p->pMemRepr ); - if ( p->vClassesTemp ) Vec_PtrFree( p->vClassesTemp ); - if ( p->vClassNew ) Vec_PtrFree( p->vClassNew ); - if ( p->vClassOld ) Vec_PtrFree( p->vClassOld ); - if ( p->vClasses1 ) Vec_PtrFree( p->vClasses1 ); - if ( p->vClasses ) Vec_PtrFree( p->vClasses ); - if ( p->vImps ) Vec_IntFree( p->vImps ); - free( p ); -} - -/**Function************************************************************* - - Synopsis [Starts representation of equivalence classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesCopyReprs( Fra_Cla_t * p, Vec_Ptr_t * vFailed ) -{ - Aig_Obj_t * pObj; - int i; - Aig_ManReprStart( p->pAig, Aig_ManObjNumMax(p->pAig) ); - memmove( p->pAig->pReprs, p->pMemRepr, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(p->pAig) ); - if ( Vec_PtrSize(p->vClasses1) == 0 && Vec_PtrSize(p->vClasses) == 0 ) - { - Aig_ManForEachObj( p->pAig, pObj, i ) - { - if ( p->pAig->pReprs[i] != NULL ) - printf( "Classes are not cleared!\n" ); - assert( p->pAig->pReprs[i] == NULL ); - } - } - if ( vFailed ) - Vec_PtrForEachEntry( vFailed, pObj, i ) - p->pAig->pReprs[pObj->Id] = NULL; -} - -/**Function************************************************************* - - Synopsis [Prints simulation classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Fra_ClassCount( Aig_Obj_t ** pClass ) -{ - Aig_Obj_t * pTemp; - int i; - for ( i = 0; (pTemp = pClass[i]); i++ ); - return i; -} - -/**Function************************************************************* - - Synopsis [Count the number of literals.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Fra_ClassesCountLits( Fra_Cla_t * p ) -{ - Aig_Obj_t ** pClass; - int i, nNodes, nLits = 0; - nLits = Vec_PtrSize( p->vClasses1 ); - Vec_PtrForEachEntry( p->vClasses, pClass, i ) - { - nNodes = Fra_ClassCount( pClass ); - assert( nNodes > 1 ); - nLits += nNodes - 1; - } - return nLits; -} - -/**Function************************************************************* - - Synopsis [Count the number of pairs.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Fra_ClassesCountPairs( Fra_Cla_t * p ) -{ - Aig_Obj_t ** pClass; - int i, nNodes, nPairs = 0; - Vec_PtrForEachEntry( p->vClasses, pClass, i ) - { - nNodes = Fra_ClassCount( pClass ); - assert( nNodes > 1 ); - nPairs += nNodes * (nNodes - 1) / 2; - } - return nPairs; -} - -/**Function************************************************************* - - Synopsis [Prints simulation classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_PrintClass( Aig_Obj_t ** pClass ) -{ - Aig_Obj_t * pTemp; - int i; - for ( i = 1; (pTemp = pClass[i]); i++ ) - assert( Fra_ClassObjRepr(pTemp) == pClass[0] ); - printf( "{ " ); - for ( i = 0; (pTemp = pClass[i]); i++ ) - printf( "%d(%d) ", pTemp->Id, pTemp->Level ); - printf( "}\n" ); -} - -/**Function************************************************************* - - Synopsis [Prints simulation classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesPrint( Fra_Cla_t * p, int fVeryVerbose ) -{ - Aig_Obj_t ** pClass; - Aig_Obj_t * pObj; - int i; - - printf( "Const = %5d. Class = %5d. Lit = %5d. ", - Vec_PtrSize(p->vClasses1), Vec_PtrSize(p->vClasses), Fra_ClassesCountLits(p) ); - if ( p->vImps && Vec_IntSize(p->vImps) > 0 ) - printf( "Imp = %5d. ", Vec_IntSize(p->vImps) ); - printf( "\n" ); - - if ( fVeryVerbose ) - { - Vec_PtrForEachEntry( p->vClasses1, pObj, i ) - assert( Fra_ClassObjRepr(pObj) == Aig_ManConst1(p->pAig) ); - printf( "Constants { " ); - Vec_PtrForEachEntry( p->vClasses1, pObj, i ) - printf( "%d ", pObj->Id ); - printf( "}\n" ); - Vec_PtrForEachEntry( p->vClasses, pClass, i ) - { - printf( "%3d (%3d) : ", i, Fra_ClassCount(pClass) ); - Fra_PrintClass( pClass ); - } - printf( "\n" ); - } -} - -/**Function************************************************************* - - Synopsis [Creates initial simulation classes.] - - Description [Assumes that simulation info is assigned.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesPrepare( Fra_Cla_t * p, int fLatchCorr, int nMaxLevs ) -{ - Aig_Obj_t ** ppTable, ** ppNexts; - Aig_Obj_t * pObj, * pTemp; - int i, k, nTableSize, nEntries, nNodes, iEntry; - - // allocate the hash table hashing simulation info into nodes - nTableSize = Aig_PrimeCudd( Aig_ManObjNumMax(p->pAig) ); - ppTable = ALLOC( Aig_Obj_t *, nTableSize ); - ppNexts = ALLOC( Aig_Obj_t *, nTableSize ); - memset( ppTable, 0, sizeof(Aig_Obj_t *) * nTableSize ); - - // add all the nodes to the hash table - Vec_PtrClear( p->vClasses1 ); - Aig_ManForEachObj( p->pAig, pObj, i ) - { - if ( fLatchCorr ) - { - if ( !Aig_ObjIsPi(pObj) ) - continue; - } - else - { - if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) ) - continue; - // skip the node with more that the given number of levels - if ( nMaxLevs && (int)pObj->Level >= nMaxLevs ) - continue; - } - // hash the node by its simulation info - iEntry = p->pFuncNodeHash( pObj, nTableSize ); - // check if the node belongs to the class of constant 1 - if ( p->pFuncNodeIsConst( pObj ) ) - { - Vec_PtrPush( p->vClasses1, pObj ); - Fra_ClassObjSetRepr( pObj, Aig_ManConst1(p->pAig) ); - continue; - } - // add the node to the class - if ( ppTable[iEntry] == NULL ) - { - ppTable[iEntry] = pObj; - Fra_ObjSetNext( ppNexts, pObj, pObj ); - } - else - { - Fra_ObjSetNext( ppNexts, pObj, Fra_ObjNext(ppNexts,ppTable[iEntry]) ); - Fra_ObjSetNext( ppNexts, ppTable[iEntry], pObj ); - } - } - - // count the total number of nodes in the non-trivial classes - // mark the representative nodes of each equivalence class - nEntries = 0; - for ( i = 0; i < nTableSize; i++ ) - if ( ppTable[i] && ppTable[i] != Fra_ObjNext(ppNexts, ppTable[i]) ) - { - for ( pTemp = Fra_ObjNext(ppNexts, ppTable[i]), k = 1; - pTemp != ppTable[i]; - pTemp = Fra_ObjNext(ppNexts, pTemp), k++ ); - assert( k > 1 ); - nEntries += k; - // mark the node - assert( ppTable[i]->fMarkA == 0 ); - ppTable[i]->fMarkA = 1; - } - - // allocate room for classes - p->pMemClasses = ALLOC( Aig_Obj_t *, 2*(nEntries + Vec_PtrSize(p->vClasses1)) ); - p->pMemClassesFree = p->pMemClasses + 2*nEntries; - - // copy the entries into storage in the topological order - Vec_PtrClear( p->vClasses ); - nEntries = 0; - Aig_ManForEachObj( p->pAig, pObj, i ) - { - if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) ) - continue; - // skip the nodes that are not representatives of non-trivial classes - if ( pObj->fMarkA == 0 ) - continue; - pObj->fMarkA = 0; - // add the class of nodes - Vec_PtrPush( p->vClasses, p->pMemClasses + 2*nEntries ); - // count the number of entries in this class - for ( pTemp = Fra_ObjNext(ppNexts, pObj), k = 1; - pTemp != pObj; - pTemp = Fra_ObjNext(ppNexts, pTemp), k++ ); - nNodes = k; - assert( nNodes > 1 ); - // add the nodes to the class in the topological order - p->pMemClasses[2*nEntries] = pObj; - for ( pTemp = Fra_ObjNext(ppNexts, pObj), k = 1; - pTemp != pObj; - pTemp = Fra_ObjNext(ppNexts, pTemp), k++ ) - { - p->pMemClasses[2*nEntries+nNodes-k] = pTemp; - Fra_ClassObjSetRepr( pTemp, pObj ); - } - // add as many empty entries - p->pMemClasses[2*nEntries + nNodes] = NULL; - // increment the number of entries - nEntries += k; - } - free( ppTable ); - free( ppNexts ); - // now it is time to refine the classes - Fra_ClassesRefine( p ); -} - -/**Function************************************************************* - - Synopsis [Refines one class using simulation info.] - - Description [Returns the new class if refinement happened.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Aig_Obj_t ** Fra_RefineClassOne( Fra_Cla_t * p, Aig_Obj_t ** ppClass ) -{ - Aig_Obj_t * pObj, ** ppThis; - int i; - assert( ppClass[0] != NULL && ppClass[1] != NULL ); - - // check if the class is going to be refined - for ( ppThis = ppClass + 1; (pObj = *ppThis); ppThis++ ) - if ( !p->pFuncNodesAreEqual(ppClass[0], pObj) ) - break; - if ( pObj == NULL ) - return NULL; - // split the class - Vec_PtrClear( p->vClassOld ); - Vec_PtrClear( p->vClassNew ); - Vec_PtrPush( p->vClassOld, ppClass[0] ); - for ( ppThis = ppClass + 1; (pObj = *ppThis); ppThis++ ) - if ( p->pFuncNodesAreEqual(ppClass[0], pObj) ) - Vec_PtrPush( p->vClassOld, pObj ); - else - Vec_PtrPush( p->vClassNew, pObj ); -/* - printf( "Refining class (" ); - Vec_PtrForEachEntry( p->vClassOld, pObj, i ) - printf( "%d,", pObj->Id ); - printf( ") + (" ); - Vec_PtrForEachEntry( p->vClassNew, pObj, i ) - printf( "%d,", pObj->Id ); - printf( ")\n" ); -*/ - // put the nodes back into the class memory - Vec_PtrForEachEntry( p->vClassOld, pObj, i ) - { - ppClass[i] = pObj; - ppClass[Vec_PtrSize(p->vClassOld)+i] = NULL; - Fra_ClassObjSetRepr( pObj, i? ppClass[0] : NULL ); - } - ppClass += 2*Vec_PtrSize(p->vClassOld); - // put the new nodes into the class memory - Vec_PtrForEachEntry( p->vClassNew, pObj, i ) - { - ppClass[i] = pObj; - ppClass[Vec_PtrSize(p->vClassNew)+i] = NULL; - Fra_ClassObjSetRepr( pObj, i? ppClass[0] : NULL ); - } - return ppClass; -} - -/**Function************************************************************* - - Synopsis [Iteratively refines the classes after simulation.] - - Description [Returns the number of refinements performed.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Fra_RefineClassLastIter( Fra_Cla_t * p, Vec_Ptr_t * vClasses ) -{ - Aig_Obj_t ** pClass, ** pClass2; - int nRefis; - pClass = Vec_PtrEntryLast( vClasses ); - for ( nRefis = 0; (pClass2 = Fra_RefineClassOne( p, pClass )); nRefis++ ) - { - // if the original class is trivial, remove it - if ( pClass[1] == NULL ) - Vec_PtrPop( vClasses ); - // if the new class is trivial, stop - if ( pClass2[1] == NULL ) - { - nRefis++; - break; - } - // othewise, add the class and continue - assert( pClass2[0] != NULL ); - Vec_PtrPush( vClasses, pClass2 ); - pClass = pClass2; - } - return nRefis; -} - -/**Function************************************************************* - - Synopsis [Refines the classes after simulation.] - - Description [Assumes that simulation info is assigned. Returns the - number of classes refined.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Fra_ClassesRefine( Fra_Cla_t * p ) -{ - Vec_Ptr_t * vTemp; - Aig_Obj_t ** pClass; - int i, nRefis; - // refine the classes - nRefis = 0; - Vec_PtrClear( p->vClassesTemp ); - Vec_PtrForEachEntry( p->vClasses, pClass, i ) - { - // add the class to the new array - assert( pClass[0] != NULL ); - Vec_PtrPush( p->vClassesTemp, pClass ); - // refine the class iteratively - nRefis += Fra_RefineClassLastIter( p, p->vClassesTemp ); - } - // exchange the class representation - vTemp = p->vClassesTemp; - p->vClassesTemp = p->vClasses; - p->vClasses = vTemp; - return nRefis; -} - -/**Function************************************************************* - - Synopsis [Refines constant 1 equivalence class.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Fra_ClassesRefine1( Fra_Cla_t * p, int fRefineNewClass, int * pSkipped ) -{ - Aig_Obj_t * pObj, ** ppClass; - int i, k, nRefis = 1; - // check if there is anything to refine - if ( Vec_PtrSize(p->vClasses1) == 0 ) - return 0; - // make sure constant 1 class contains only non-constant nodes - assert( Vec_PtrEntry(p->vClasses1,0) != Aig_ManConst1(p->pAig) ); - // collect all the nodes to be refined - k = 0; - Vec_PtrClear( p->vClassNew ); - Vec_PtrForEachEntry( p->vClasses1, pObj, i ) - { - if ( p->pFuncNodeIsConst( pObj ) ) - Vec_PtrWriteEntry( p->vClasses1, k++, pObj ); - else - Vec_PtrPush( p->vClassNew, pObj ); - } - Vec_PtrShrink( p->vClasses1, k ); - if ( Vec_PtrSize(p->vClassNew) == 0 ) - return 0; -/* - printf( "Refined const-1 class: {" ); - Vec_PtrForEachEntry( p->vClassNew, pObj, i ) - printf( " %d", pObj->Id ); - printf( " }\n" ); -*/ - if ( Vec_PtrSize(p->vClassNew) == 1 ) - { - Fra_ClassObjSetRepr( Vec_PtrEntry(p->vClassNew,0), NULL ); - return 1; - } - // create a new class composed of these nodes - ppClass = p->pMemClassesFree; - p->pMemClassesFree += 2 * Vec_PtrSize(p->vClassNew); - Vec_PtrForEachEntry( p->vClassNew, pObj, i ) - { - ppClass[i] = pObj; - ppClass[Vec_PtrSize(p->vClassNew)+i] = NULL; - Fra_ClassObjSetRepr( pObj, i? ppClass[0] : NULL ); - } - assert( ppClass[0] != NULL ); - Vec_PtrPush( p->vClasses, ppClass ); - // iteratively refine this class - if ( fRefineNewClass ) - nRefis += Fra_RefineClassLastIter( p, p->vClasses ); - else if ( pSkipped ) - (*pSkipped)++; - return nRefis; -} - -/**Function************************************************************* - - Synopsis [Starts representation of equivalence classes with one class.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesTest( Fra_Cla_t * p, int Id1, int Id2 ) -{ - Aig_Obj_t ** pClass; - p->pMemClasses = ALLOC( Aig_Obj_t *, 4 ); - pClass = p->pMemClasses; - assert( Id1 < Id2 ); - pClass[0] = Aig_ManObj( p->pAig, Id1 ); - pClass[1] = Aig_ManObj( p->pAig, Id2 ); - pClass[2] = NULL; - pClass[3] = NULL; - Fra_ClassObjSetRepr( pClass[1], pClass[0] ); - Vec_PtrPush( p->vClasses, pClass ); -} - -/**Function************************************************************* - - Synopsis [Creates latch correspondence classes.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesLatchCorr( Fra_Man_t * p ) -{ - Aig_Obj_t * pObj; - int i, nEntries = 0; - Vec_PtrClear( p->pCla->vClasses1 ); - Aig_ManForEachLoSeq( p->pManAig, pObj, i ) - { - Vec_PtrPush( p->pCla->vClasses1, pObj ); - Fra_ClassObjSetRepr( pObj, Aig_ManConst1(p->pManAig) ); - } - // allocate room for classes - p->pCla->pMemClasses = ALLOC( Aig_Obj_t *, 2*(nEntries + Vec_PtrSize(p->pCla->vClasses1)) ); - p->pCla->pMemClassesFree = p->pCla->pMemClasses + 2*nEntries; -} - -/**Function************************************************************* - - Synopsis [Postprocesses the classes by removing half of the less useful.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesPostprocess( Fra_Cla_t * p ) -{ - int Ratio = 2; - Fra_Sml_t * pComb; - Aig_Obj_t * pObj, * pRepr, ** ppClass; - int * pWeights, WeightMax = 0, i, k, c; - // perform combinational simulation - pComb = Fra_SmlSimulateComb( p->pAig, 32 ); - // compute the weight of each node in the classes - pWeights = ALLOC( int, Aig_ManObjNumMax(p->pAig) ); - memset( pWeights, 0, sizeof(int) * Aig_ManObjNumMax(p->pAig) ); - Aig_ManForEachObj( p->pAig, pObj, i ) - { - pRepr = Fra_ClassObjRepr( pObj ); - if ( pRepr == NULL ) - continue; - pWeights[i] = Fra_SmlNodeNotEquWeight( pComb, pRepr->Id, pObj->Id ); - WeightMax = AIG_MAX( WeightMax, pWeights[i] ); - } - Fra_SmlStop( pComb ); - printf( "Before: Const = %6d. Class = %6d. ", Vec_PtrSize(p->vClasses1), Vec_PtrSize(p->vClasses) ); - // remove nodes from classes whose weight is less than WeightMax/Ratio - k = 0; - Vec_PtrForEachEntry( p->vClasses1, pObj, i ) - { - if ( pWeights[pObj->Id] >= WeightMax/Ratio ) - Vec_PtrWriteEntry( p->vClasses1, k++, pObj ); - else - Fra_ClassObjSetRepr( pObj, NULL ); - } - Vec_PtrShrink( p->vClasses1, k ); - // in each class, compact the nodes - Vec_PtrForEachEntry( p->vClasses, ppClass, i ) - { - k = 1; - for ( c = 1; ppClass[c]; c++ ) - { - if ( pWeights[ppClass[c]->Id] >= WeightMax/Ratio ) - ppClass[k++] = ppClass[c]; - else - Fra_ClassObjSetRepr( ppClass[c], NULL ); - } - ppClass[k] = NULL; - } - // remove classes with only repr - k = 0; - Vec_PtrForEachEntry( p->vClasses, ppClass, i ) - if ( ppClass[1] != NULL ) - Vec_PtrWriteEntry( p->vClasses, k++, ppClass ); - Vec_PtrShrink( p->vClasses, k ); - printf( "After: Const = %6d. Class = %6d. \n", Vec_PtrSize(p->vClasses1), Vec_PtrSize(p->vClasses) ); - free( pWeights ); -} - -/**Function************************************************************* - - Synopsis [Postprocesses the classes by selecting representative lowest in top order.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Fra_ClassesSelectRepr( Fra_Cla_t * p ) -{ - Aig_Obj_t ** pClass, * pNodeMin; - int i, c, cMinSupp, nSuppSizeMin, nSuppSizeCur; - // reassign representatives in each class - Vec_PtrForEachEntry( p->vClasses, pClass, i ) - { - // collect support sizes and find the min-support node - cMinSupp = -1; - pNodeMin = NULL; - nSuppSizeMin = AIG_INFINITY; - for ( c = 0; pClass[c]; c++ ) - { - nSuppSizeCur = Aig_SupportSize( p->pAig, pClass[c] ); -// nSuppSizeCur = 1; - if ( nSuppSizeMin > nSuppSizeCur || - (nSuppSizeMin == nSuppSizeCur && pNodeMin->Level > pClass[c]->Level) ) - { - nSuppSizeMin = nSuppSizeCur; - pNodeMin = pClass[c]; - cMinSupp = c; - } - } - // skip the case when the repr did not change - if ( cMinSupp == 0 ) - continue; - // make the new node the representative of the class - pClass[cMinSupp] = pClass[0]; - pClass[0] = pNodeMin; - // set the representative - for ( c = 0; pClass[c]; c++ ) - Fra_ClassObjSetRepr( pClass[c], c? pClass[0] : NULL ); - } -} - - - -static inline Aig_Obj_t * Fra_ObjEqu( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj ) { return ppEquivs[pObj->Id]; } -static inline void Fra_ObjSetEqu( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj, Aig_Obj_t * pNode ) { ppEquivs[pObj->Id] = pNode; } - -static inline Aig_Obj_t * Fra_ObjChild0Equ( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj ) { return Aig_NotCond(Fra_ObjEqu(ppEquivs,Aig_ObjFanin0(pObj)), Aig_ObjFaninC0(pObj)); } -static inline Aig_Obj_t * Fra_ObjChild1Equ( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj ) { return Aig_NotCond(Fra_ObjEqu(ppEquivs,Aig_ObjFanin1(pObj)), Aig_ObjFaninC1(pObj)); } - -/**Function************************************************************* - - Synopsis [Add the node and its constraints to the new AIG.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline void Fra_ClassesDeriveNode( Aig_Man_t * pManFraig, Aig_Obj_t * pObj, Aig_Obj_t ** ppEquivs ) -{ - Aig_Obj_t * pObjNew, * pObjRepr, * pObjReprNew, * pMiter;//, * pObjNew2; - // skip nodes without representative - if ( (pObjRepr = Fra_ClassObjRepr(pObj)) == NULL ) - return; - assert( pObjRepr->Id < pObj->Id ); - // get the new node - pObjNew = Fra_ObjEqu( ppEquivs, pObj ); - // get the new node of the representative - pObjReprNew = Fra_ObjEqu( ppEquivs, pObjRepr ); - // if this is the same node, no need to add constraints - if ( Aig_Regular(pObjNew) == Aig_Regular(pObjReprNew) ) - return; - // these are different nodes - perform speculative reduction -// pObjNew2 = Aig_NotCond( pObjReprNew, pObj->fPhase ^ pObjRepr->fPhase ); - // set the new node -// Fra_ObjSetEqu( ppEquivs, pObj, pObjNew2 ); - // add the constraint - pMiter = Aig_Exor( pManFraig, Aig_Regular(pObjNew), Aig_Regular(pObjReprNew) ); - pMiter = Aig_NotCond( pMiter, Aig_Regular(pMiter)->fPhase ^ Aig_IsComplement(pMiter) ); - pMiter = Aig_Not( pMiter ); - Aig_ObjCreatePo( pManFraig, pMiter ); -} - -/**Function************************************************************* - - Synopsis [Derives AIG for the partitioned problem.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Aig_Man_t * Fra_ClassesDeriveAig( Fra_Cla_t * p, int nFramesK ) -{ - Aig_Man_t * pManFraig; - Aig_Obj_t * pObj, * pObjNew; - Aig_Obj_t ** pLatches, ** ppEquivs; - int i, k, f, nFramesAll = nFramesK + 1; - assert( Aig_ManRegNum(p->pAig) > 0 ); - assert( Aig_ManRegNum(p->pAig) < Aig_ManPiNum(p->pAig) ); - assert( nFramesK > 0 ); - // start the fraig package - pManFraig = Aig_ManStart( Aig_ManObjNumMax(p->pAig) * nFramesAll ); - pManFraig->pName = Aig_UtilStrsav( p->pAig->pName ); - // allocate place for the node mapping - ppEquivs = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(p->pAig) ); - Fra_ObjSetEqu( ppEquivs, Aig_ManConst1(p->pAig), Aig_ManConst1(pManFraig) ); - // create latches for the first frame - Aig_ManForEachLoSeq( p->pAig, pObj, i ) - Fra_ObjSetEqu( ppEquivs, pObj, Aig_ObjCreatePi(pManFraig) ); - // add timeframes - pLatches = ALLOC( Aig_Obj_t *, Aig_ManRegNum(p->pAig) ); - for ( f = 0; f < nFramesAll; f++ ) - { - // create PIs for this frame - Aig_ManForEachPiSeq( p->pAig, pObj, i ) - Fra_ObjSetEqu( ppEquivs, pObj, Aig_ObjCreatePi(pManFraig) ); - // set the constraints on the latch outputs - Aig_ManForEachLoSeq( p->pAig, pObj, i ) - Fra_ClassesDeriveNode( pManFraig, pObj, ppEquivs ); - // add internal nodes of this frame - Aig_ManForEachNode( p->pAig, pObj, i ) - { - pObjNew = Aig_And( pManFraig, Fra_ObjChild0Equ(ppEquivs, pObj), Fra_ObjChild1Equ(ppEquivs, pObj) ); - Fra_ObjSetEqu( ppEquivs, pObj, pObjNew ); - Fra_ClassesDeriveNode( pManFraig, pObj, ppEquivs ); - } - if ( f == nFramesAll - 1 ) - break; - if ( f == nFramesAll - 2 ) - pManFraig->nAsserts = Aig_ManPoNum(pManFraig); - // save the latch input values - k = 0; - Aig_ManForEachLiSeq( p->pAig, pObj, i ) - pLatches[k++] = Fra_ObjChild0Equ( ppEquivs, pObj ); - // insert them to the latch output values - k = 0; - Aig_ManForEachLoSeq( p->pAig, pObj, i ) - Fra_ObjSetEqu( ppEquivs, pObj, pLatches[k++] ); - } - free( pLatches ); - free( ppEquivs ); - // mark the asserts - assert( Aig_ManPoNum(pManFraig) % nFramesAll == 0 ); -printf( "Assert miters = %6d. Output miters = %6d.\n", - pManFraig->nAsserts, Aig_ManPoNum(pManFraig) - pManFraig->nAsserts ); - // remove dangling nodes - Aig_ManCleanup( pManFraig ); - return pManFraig; -} - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - |