diff options
author | Alan Mishchenko <alanmi@berkeley.edu> | 2007-09-30 08:01:00 -0700 |
---|---|---|
committer | Alan Mishchenko <alanmi@berkeley.edu> | 2007-09-30 08:01:00 -0700 |
commit | e54d9691616b9a0326e2fdb3156bb4eeb8abfcd7 (patch) | |
tree | de3ffe87c3e17950351e3b7d97fa18318bd5ea9a /src/aig/cnf/cnfWrite.c | |
parent | 7d7e60f2dc84393cd4c5db22d2eaf7b1fb1a79b2 (diff) | |
download | abc-e54d9691616b9a0326e2fdb3156bb4eeb8abfcd7.tar.gz abc-e54d9691616b9a0326e2fdb3156bb4eeb8abfcd7.tar.bz2 abc-e54d9691616b9a0326e2fdb3156bb4eeb8abfcd7.zip |
Version abc70930
Diffstat (limited to 'src/aig/cnf/cnfWrite.c')
-rw-r--r-- | src/aig/cnf/cnfWrite.c | 443 |
1 files changed, 0 insertions, 443 deletions
diff --git a/src/aig/cnf/cnfWrite.c b/src/aig/cnf/cnfWrite.c deleted file mode 100644 index 45a3efad..00000000 --- a/src/aig/cnf/cnfWrite.c +++ /dev/null @@ -1,443 +0,0 @@ -/**CFile**************************************************************** - - FileName [cnfWrite.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [AIG-to-CNF conversion.] - - Synopsis [] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - April 28, 2007.] - - Revision [$Id: cnfWrite.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "cnf.h" - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Writes the cover into the array.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Cnf_SopConvertToVector( char * pSop, int nCubes, Vec_Int_t * vCover ) -{ - int Lits[4], Cube, iCube, i, b; - Vec_IntClear( vCover ); - for ( i = 0; i < nCubes; i++ ) - { - Cube = pSop[i]; - for ( b = 0; b < 4; b++ ) - { - if ( Cube % 3 == 0 ) - Lits[b] = 1; - else if ( Cube % 3 == 1 ) - Lits[b] = 2; - else - Lits[b] = 0; - Cube = Cube / 3; - } - iCube = 0; - for ( b = 0; b < 4; b++ ) - iCube = (iCube << 2) | Lits[b]; - Vec_IntPush( vCover, iCube ); - } -} - -/**Function************************************************************* - - Synopsis [Returns the number of literals in the SOP.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Cnf_SopCountLiterals( char * pSop, int nCubes ) -{ - int nLits = 0, Cube, i, b; - for ( i = 0; i < nCubes; i++ ) - { - Cube = pSop[i]; - for ( b = 0; b < 4; b++ ) - { - if ( Cube % 3 != 2 ) - nLits++; - Cube = Cube / 3; - } - } - return nLits; -} - -/**Function************************************************************* - - Synopsis [Returns the number of literals in the SOP.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Cnf_IsopCountLiterals( Vec_Int_t * vIsop, int nVars ) -{ - int nLits = 0, Cube, i, b; - Vec_IntForEachEntry( vIsop, Cube, i ) - { - for ( b = 0; b < nVars; b++ ) - { - if ( (Cube & 3) == 1 || (Cube & 3) == 2 ) - nLits++; - Cube >>= 2; - } - } - return nLits; -} - -/**Function************************************************************* - - Synopsis [Writes the cube and returns the number of literals in it.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Cnf_IsopWriteCube( int Cube, int nVars, int * pVars, int * pLiterals ) -{ - int nLits = nVars, b; - for ( b = 0; b < nVars; b++ ) - { - if ( (Cube & 3) == 1 ) // value 0 --> write positive literal - *pLiterals++ = 2 * pVars[b]; - else if ( (Cube & 3) == 2 ) // value 1 --> write negative literal - *pLiterals++ = 2 * pVars[b] + 1; - else - nLits--; - Cube >>= 2; - } - return nLits; -} - -/**Function************************************************************* - - Synopsis [Derives CNF for the mapping.] - - Description [The last argument shows the number of last outputs - of the manager, which will not be converted into clauses but the - new variables for which will be introduced.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Cnf_Dat_t * Cnf_ManWriteCnf( Cnf_Man_t * p, Vec_Ptr_t * vMapped, int nOutputs ) -{ - Aig_Obj_t * pObj; - Cnf_Dat_t * pCnf; - Cnf_Cut_t * pCut; - Vec_Int_t * vCover, * vSopTemp; - int OutVar, PoVar, pVars[32], * pLits, ** pClas; - unsigned uTruth; - int i, k, nLiterals, nClauses, Cube, Number; - - // count the number of literals and clauses - nLiterals = 1 + Aig_ManPoNum( p->pManAig ) + 3 * nOutputs; - nClauses = 1 + Aig_ManPoNum( p->pManAig ) + nOutputs; - Vec_PtrForEachEntry( vMapped, pObj, i ) - { - assert( Aig_ObjIsNode(pObj) ); - pCut = Cnf_ObjBestCut( pObj ); - - // positive polarity of the cut - if ( pCut->nFanins < 5 ) - { - uTruth = 0xFFFF & *Cnf_CutTruth(pCut); - nLiterals += Cnf_SopCountLiterals( p->pSops[uTruth], p->pSopSizes[uTruth] ) + p->pSopSizes[uTruth]; - assert( p->pSopSizes[uTruth] >= 0 ); - nClauses += p->pSopSizes[uTruth]; - } - else - { - nLiterals += Cnf_IsopCountLiterals( pCut->vIsop[1], pCut->nFanins ) + Vec_IntSize(pCut->vIsop[1]); - nClauses += Vec_IntSize(pCut->vIsop[1]); - } - // negative polarity of the cut - if ( pCut->nFanins < 5 ) - { - uTruth = 0xFFFF & ~*Cnf_CutTruth(pCut); - nLiterals += Cnf_SopCountLiterals( p->pSops[uTruth], p->pSopSizes[uTruth] ) + p->pSopSizes[uTruth]; - assert( p->pSopSizes[uTruth] >= 0 ); - nClauses += p->pSopSizes[uTruth]; - } - else - { - nLiterals += Cnf_IsopCountLiterals( pCut->vIsop[0], pCut->nFanins ) + Vec_IntSize(pCut->vIsop[0]); - nClauses += Vec_IntSize(pCut->vIsop[0]); - } -//printf( "%d ", nClauses-(1 + Aig_ManPoNum( p->pManAig )) ); - } -//printf( "\n" ); - - // allocate CNF - pCnf = ALLOC( Cnf_Dat_t, 1 ); - memset( pCnf, 0, sizeof(Cnf_Dat_t) ); - pCnf->nLiterals = nLiterals; - pCnf->nClauses = nClauses; - pCnf->pClauses = ALLOC( int *, nClauses + 1 ); - pCnf->pClauses[0] = ALLOC( int, nLiterals ); - pCnf->pClauses[nClauses] = pCnf->pClauses[0] + nLiterals; - - // create room for variable numbers - pCnf->pVarNums = ALLOC( int, Aig_ManObjNumMax(p->pManAig) ); - memset( pCnf->pVarNums, 0xff, sizeof(int) * Aig_ManObjNumMax(p->pManAig) ); - // assign variables to the last (nOutputs) POs - Number = 1; - if ( nOutputs ) - { - assert( nOutputs == Aig_ManRegNum(p->pManAig) ); - Aig_ManForEachLiSeq( p->pManAig, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - } - // assign variables to the internal nodes - Vec_PtrForEachEntry( vMapped, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - // assign variables to the PIs and constant node - Aig_ManForEachPi( p->pManAig, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - pCnf->pVarNums[Aig_ManConst1(p->pManAig)->Id] = Number++; - pCnf->nVars = Number; - - // assign the clauses - vSopTemp = Vec_IntAlloc( 1 << 16 ); - pLits = pCnf->pClauses[0]; - pClas = pCnf->pClauses; - Vec_PtrForEachEntry( vMapped, pObj, i ) - { - pCut = Cnf_ObjBestCut( pObj ); - - // save variables of this cut - OutVar = pCnf->pVarNums[ pObj->Id ]; - for ( k = 0; k < (int)pCut->nFanins; k++ ) - { - pVars[k] = pCnf->pVarNums[ pCut->pFanins[k] ]; - assert( pVars[k] <= Aig_ManObjNumMax(p->pManAig) ); - } - - // positive polarity of the cut - if ( pCut->nFanins < 5 ) - { - uTruth = 0xFFFF & *Cnf_CutTruth(pCut); - Cnf_SopConvertToVector( p->pSops[uTruth], p->pSopSizes[uTruth], vSopTemp ); - vCover = vSopTemp; - } - else - vCover = pCut->vIsop[1]; - Vec_IntForEachEntry( vCover, Cube, k ) - { - *pClas++ = pLits; - *pLits++ = 2 * OutVar; - pLits += Cnf_IsopWriteCube( Cube, pCut->nFanins, pVars, pLits ); - } - - // negative polarity of the cut - if ( pCut->nFanins < 5 ) - { - uTruth = 0xFFFF & ~*Cnf_CutTruth(pCut); - Cnf_SopConvertToVector( p->pSops[uTruth], p->pSopSizes[uTruth], vSopTemp ); - vCover = vSopTemp; - } - else - vCover = pCut->vIsop[0]; - Vec_IntForEachEntry( vCover, Cube, k ) - { - *pClas++ = pLits; - *pLits++ = 2 * OutVar + 1; - pLits += Cnf_IsopWriteCube( Cube, pCut->nFanins, pVars, pLits ); - } - } - Vec_IntFree( vSopTemp ); - - // write the constant literal - OutVar = pCnf->pVarNums[ Aig_ManConst1(p->pManAig)->Id ]; - assert( OutVar <= Aig_ManObjNumMax(p->pManAig) ); - *pClas++ = pLits; - *pLits++ = 2 * OutVar; - - // write the output literals - Aig_ManForEachPo( p->pManAig, pObj, i ) - { - OutVar = pCnf->pVarNums[ Aig_ObjFanin0(pObj)->Id ]; - if ( i < Aig_ManPoNum(p->pManAig) - nOutputs ) - { - *pClas++ = pLits; - *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); - } - else - { - PoVar = pCnf->pVarNums[ pObj->Id ]; - // first clause - *pClas++ = pLits; - *pLits++ = 2 * PoVar; - *pLits++ = 2 * OutVar + !Aig_ObjFaninC0(pObj); - // second clause - *pClas++ = pLits; - *pLits++ = 2 * PoVar + 1; - *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); - } - } - - // verify that the correct number of literals and clauses was written - assert( pLits - pCnf->pClauses[0] == nLiterals ); - assert( pClas - pCnf->pClauses == nClauses ); - return pCnf; -} - - -/**Function************************************************************* - - Synopsis [Derives a simple CNF for the AIG.] - - Description [The last argument shows the number of last outputs - of the manager, which will not be converted into clauses but the - new variables for which will be introduced.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Cnf_Dat_t * Cnf_DeriveSimple( Aig_Man_t * p, int nOutputs ) -{ - Aig_Obj_t * pObj; - Cnf_Dat_t * pCnf; - int OutVar, PoVar, pVars[32], * pLits, ** pClas; - int i, nLiterals, nClauses, Number; - - // count the number of literals and clauses - nLiterals = 1 + 7 * Aig_ManNodeNum(p) + Aig_ManPoNum( p ) + 3 * nOutputs; - nClauses = 1 + 3 * Aig_ManNodeNum(p) + Aig_ManPoNum( p ) + nOutputs; - - // allocate CNF - pCnf = ALLOC( Cnf_Dat_t, 1 ); - memset( pCnf, 0, sizeof(Cnf_Dat_t) ); - pCnf->nLiterals = nLiterals; - pCnf->nClauses = nClauses; - pCnf->pClauses = ALLOC( int *, nClauses + 1 ); - pCnf->pClauses[0] = ALLOC( int, nLiterals ); - pCnf->pClauses[nClauses] = pCnf->pClauses[0] + nLiterals; - - // create room for variable numbers - pCnf->pVarNums = ALLOC( int, Aig_ManObjNumMax(p) ); - memset( pCnf->pVarNums, 0xff, sizeof(int) * Aig_ManObjNumMax(p) ); - // assign variables to the last (nOutputs) POs - Number = 1; - if ( nOutputs ) - { - assert( nOutputs == Aig_ManRegNum(p) ); - Aig_ManForEachLiSeq( p, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - } - // assign variables to the internal nodes - Aig_ManForEachNode( p, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - // assign variables to the PIs and constant node - Aig_ManForEachPi( p, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - pCnf->pVarNums[Aig_ManConst1(p)->Id] = Number++; - pCnf->nVars = Number; -/* - // print CNF numbers - printf( "SAT numbers of each node:\n" ); - Aig_ManForEachObj( p, pObj, i ) - printf( "%d=%d ", pObj->Id, pCnf->pVarNums[pObj->Id] ); - printf( "\n" ); -*/ - // assign the clauses - pLits = pCnf->pClauses[0]; - pClas = pCnf->pClauses; - Aig_ManForEachNode( p, pObj, i ) - { - OutVar = pCnf->pVarNums[ pObj->Id ]; - pVars[0] = pCnf->pVarNums[ Aig_ObjFanin0(pObj)->Id ]; - pVars[1] = pCnf->pVarNums[ Aig_ObjFanin1(pObj)->Id ]; - - // positive phase - *pClas++ = pLits; - *pLits++ = 2 * OutVar; - *pLits++ = 2 * pVars[0] + !Aig_ObjFaninC0(pObj); - *pLits++ = 2 * pVars[1] + !Aig_ObjFaninC1(pObj); - // negative phase - *pClas++ = pLits; - *pLits++ = 2 * OutVar + 1; - *pLits++ = 2 * pVars[0] + Aig_ObjFaninC0(pObj); - *pClas++ = pLits; - *pLits++ = 2 * OutVar + 1; - *pLits++ = 2 * pVars[1] + Aig_ObjFaninC1(pObj); - } - - // write the constant literal - OutVar = pCnf->pVarNums[ Aig_ManConst1(p)->Id ]; - assert( OutVar <= Aig_ManObjNumMax(p) ); - *pClas++ = pLits; - *pLits++ = 2 * OutVar; - - // write the output literals - Aig_ManForEachPo( p, pObj, i ) - { - OutVar = pCnf->pVarNums[ Aig_ObjFanin0(pObj)->Id ]; - if ( i < Aig_ManPoNum(p) - nOutputs ) - { - *pClas++ = pLits; - *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); - } - else - { - PoVar = pCnf->pVarNums[ pObj->Id ]; - // first clause - *pClas++ = pLits; - *pLits++ = 2 * PoVar; - *pLits++ = 2 * OutVar + !Aig_ObjFaninC0(pObj); - // second clause - *pClas++ = pLits; - *pLits++ = 2 * PoVar + 1; - *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); - } - } - - // verify that the correct number of literals and clauses was written - assert( pLits - pCnf->pClauses[0] == nLiterals ); - assert( pClas - pCnf->pClauses == nClauses ); - return pCnf; -} - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - |