ABC_NAMESPACE_IMPL_START void Aig_ProcedureTest() { Aig_Man_t * p; Aig_Obj_t * pA, * pB, * pC; Aig_Obj_t * pFunc; Aig_Obj_t * pFunc2; p = Aig_ManStart( 1000 ); pA = Aig_IthVar( p, 0 ); pB = Aig_IthVar( p, 1 ); pC = Aig_IthVar( p, 2 ); pFunc = Aig_Mux( p, pA, pB, pC ); pFunc2 = Aig_And( p, pA, pB ); Aig_ObjCreatePo( p, pFunc ); Aig_ObjCreatePo( p, pFunc2 ); Aig_ManSetRegNum( p, 1 ); Aig_ManCleanup( p ); if ( !Aig_ManCheck( p ) ) { printf( "Check has failed\n" ); } Aig_ManDumpBlif( p, "aig_test_file.blif", NULL, NULL ); Aig_ManStop( p ); }ABC_NAMESPACE_IMPL_END
void ToCNFAIG::toCNF(const BBNodeAIG& top, Cnf_Dat_t*& cnfData, ToSATBase::ASTNodeToSATVar& nodeToVar, bool needAbsRef, BBNodeManagerAIG& mgr) { assert(cnfData == NULL); Aig_ObjCreatePo(mgr.aigMgr, top.n); if (!needAbsRef) { Aig_ManCleanup( mgr.aigMgr); // remove nodes not connected to the PO. } Aig_ManCheck( mgr.aigMgr); // check that AIG looks ok. assert(Aig_ManPoNum(mgr.aigMgr) == 1); // UseZeroes gives assertion errors. // Rewriting is sometimes very slow. Can it be configured to be faster? // What about refactoring??? int nodeCount = mgr.aigMgr->nObjs[AIG_OBJ_AND]; if (uf.stats_flag) cerr << "Nodes before AIG rewrite:" << nodeCount << endl; if (!needAbsRef && uf.isSet("aig-rewrite","0")) { Dar_LibStart(); Aig_Man_t * pTemp; Dar_RwrPar_t Pars, *pPars = &Pars; Dar_ManDefaultRwrParams(pPars); // Assertion errors occur with this enabled. // pPars->fUseZeros = 1; // For mul63bit.smt2 with iterations =3 & nCutsMax = 8 // CNF generation was taking 139 seconds, solving 10 seconds. // With nCutsMax =2, CNF generation takes 16 seconds, solving 10 seconds. // The rewriting doesn't remove as many nodes of course.. int iterations = 3; for (int i = 0; i < iterations; i++) { mgr.aigMgr = Aig_ManDup(pTemp = mgr.aigMgr, 0); Aig_ManStop(pTemp); Dar_ManRewrite(mgr.aigMgr, pPars); mgr.aigMgr = Aig_ManDup(pTemp = mgr.aigMgr, 0); Aig_ManStop(pTemp); if (uf.stats_flag) cerr << "After rewrite [" << i << "] nodes:" << mgr.aigMgr->nObjs[AIG_OBJ_AND] << endl; if (nodeCount == mgr.aigMgr->nObjs[AIG_OBJ_AND]) break; } } if (!uf.isSet("simple-cnf","0")) { cnfData = Cnf_Derive(mgr.aigMgr, 0); if (uf.stats_flag) cerr << "advanced CNF" << endl; } else { cnfData = Cnf_DeriveSimple(mgr.aigMgr, 0); if (uf.stats_flag) cerr << "simple CNF" << endl; } BBNodeManagerAIG::SymbolToBBNode::const_iterator it; assert(nodeToVar.size() == 0); //todo. cf. with addvariables above... // Each symbol maps to a vector of CNF variables. for (it = mgr.symbolToBBNode.begin(); it != mgr.symbolToBBNode.end(); it++) { const ASTNode& n = it->first; const vector<BBNodeAIG> &b = it->second; assert(nodeToVar.find(n) == nodeToVar.end()); const int width = (n.GetType() == BOOLEAN_TYPE) ? 1 : n.GetValueWidth(); // INT_MAX for parts of symbols that didn't get encoded. vector<unsigned> v(width, ~((unsigned) 0)); for (unsigned i = 0; i < b.size(); i++) { if (!b[i].IsNull()) { Aig_Obj_t * pObj; pObj = (Aig_Obj_t*) Vec_PtrEntry(mgr.aigMgr->vPis, b[i].symbol_index); v[i] = cnfData->pVarNums[pObj->Id]; } } nodeToVar.insert(make_pair(n, v)); } assert(cnfData != NULL); }