diff options
Diffstat (limited to 'src/aig/ntl/ntlUtil.c')
| -rw-r--r-- | src/aig/ntl/ntlUtil.c | 208 |
1 files changed, 206 insertions, 2 deletions
diff --git a/src/aig/ntl/ntlUtil.c b/src/aig/ntl/ntlUtil.c index b13dd3a7..626bcbe1 100644 --- a/src/aig/ntl/ntlUtil.c +++ b/src/aig/ntl/ntlUtil.c @@ -30,7 +30,28 @@ /**Function************************************************************* - Synopsis [Returns 1 if netlist was written by ABC with added bufs/invs.] + Synopsis [Counts COs that are connected to the internal nodes through invs/bufs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ntl_ModelCountLut1( Ntl_Mod_t * pRoot ) +{ + Ntl_Obj_t * pObj; + int i, Counter = 0; + Ntl_ModelForEachNode( pRoot, pObj, i ) + if ( Ntl_ObjFaninNum(pObj) == 1 ) + Counter++; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Connects COs to the internal nodes other than inv/bufs.] Description [Should be called immediately after reading from file.] @@ -39,6 +60,63 @@ SeeAlso [] ***********************************************************************/ +int Ntl_ManCountSimpleCoDriversOne( Ntl_Net_t * pNetCo ) +{ + Ntl_Net_t * pNetFanin; + // skip the case when the net is not driven by a node + if ( !Ntl_ObjIsNode(pNetCo->pDriver) ) + return 0; + // skip the case when the node is not an inv/buf + if ( Ntl_ObjFaninNum(pNetCo->pDriver) != 1 ) + return 0; + // skip the case when the second-generation driver is not a node + pNetFanin = Ntl_ObjFanin0(pNetCo->pDriver); + if ( !Ntl_ObjIsNode(pNetFanin->pDriver) ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Counts COs that are connected to the internal nodes through invs/bufs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ntl_ManCountSimpleCoDrivers( Ntl_Man_t * p ) +{ + Ntl_Net_t * pNetCo; + Ntl_Obj_t * pObj; + Ntl_Mod_t * pRoot; + int i, k, Counter; + Counter = 0; + pRoot = Ntl_ManRootModel( p ); + Ntl_ModelForEachPo( pRoot, pObj, i ) + Counter += Ntl_ManCountSimpleCoDriversOne( Ntl_ObjFanin0(pObj) ); + Ntl_ModelForEachLatch( pRoot, pObj, i ) + Counter += Ntl_ManCountSimpleCoDriversOne( Ntl_ObjFanin0(pObj) ); + Ntl_ModelForEachBox( pRoot, pObj, i ) + Ntl_ObjForEachFanin( pObj, pNetCo, k ) + Counter += Ntl_ManCountSimpleCoDriversOne( pNetCo ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Removes the CO drivers that are bufs/invs.] + + Description [Should be called immediately after reading from file.] + + SideEffects [This procedure does not work because the internal net + (pNetFanin) may have other drivers.] + + SeeAlso [] + +***********************************************************************/ int Ntl_ManTransformCoDrivers( Ntl_Man_t * p ) { Vec_Ptr_t * vCoNets; @@ -110,7 +188,71 @@ int Ntl_ManTransformCoDrivers( Ntl_Man_t * p ) Counter++; } Vec_PtrFree( vCoNets ); - pRoot->nObjs[NTL_OBJ_NODE] -= Counter; + pRoot->nObjs[NTL_OBJ_LUT1] -= Counter; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Connects COs to the internal nodes other than inv/bufs.] + + Description [Should be called immediately after reading from file.] + + SideEffects [This procedure does not work because the internal net + (pNetFanin) may have other drivers.] + + SeeAlso [] + +***********************************************************************/ +int Ntl_ManReconnectCoDriverOne( Ntl_Net_t * pNetCo ) +{ + Ntl_Net_t * pNetFanin; + // skip the case when the net is not driven by a node + if ( !Ntl_ObjIsNode(pNetCo->pDriver) ) + return 0; + // skip the case when the node is not an inv/buf + if ( Ntl_ObjFaninNum(pNetCo->pDriver) != 1 ) + return 0; + // skip the case when the second-generation driver is not a node + pNetFanin = Ntl_ObjFanin0(pNetCo->pDriver); + if ( !Ntl_ObjIsNode(pNetFanin->pDriver) ) + return 0; + // set the complemented attribute of the net + pNetCo->fCompl = (int)(pNetCo->pDriver->pSop[0] == '0'); + // drive the CO net with the second-generation driver + pNetCo->pDriver = NULL; + pNetFanin->pDriver->pFanio[pNetFanin->pDriver->nFanins] = NULL; + if ( !Ntl_ModelSetNetDriver( pNetFanin->pDriver, pNetCo ) ) + printf( "Ntl_ManReconnectCoDriverOne(): Cannot connect the net.\n" ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Connects COs to the internal nodes other than inv/bufs.] + + Description [Should be called immediately after reading from file.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ntl_ManReconnectCoDrivers( Ntl_Man_t * p ) +{ + Ntl_Net_t * pNetCo; + Ntl_Obj_t * pObj; + Ntl_Mod_t * pRoot; + int i, k, Counter; + Counter = 0; + pRoot = Ntl_ManRootModel( p ); + Ntl_ModelForEachPo( pRoot, pObj, i ) + Counter += Ntl_ManReconnectCoDriverOne( Ntl_ObjFanin0(pObj) ); + Ntl_ModelForEachLatch( pRoot, pObj, i ) + Counter += Ntl_ManReconnectCoDriverOne( Ntl_ObjFanin0(pObj) ); + Ntl_ModelForEachBox( pRoot, pObj, i ) + Ntl_ObjForEachFanin( pObj, pNetCo, k ) + Counter += Ntl_ManReconnectCoDriverOne( pNetCo ); return Counter; } @@ -158,6 +300,68 @@ Vec_Ptr_t * Ntl_ManCollectCoNames( Ntl_Man_t * p ) return vNames; } +/**Function************************************************************* + + Synopsis [Marks the CI/CO nets.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ntl_ManMarkCiCoNets( Ntl_Man_t * p ) +{ + Ntl_Net_t * pNet; + int i; + Ntl_ManForEachCiNet( p, pNet, i ) + pNet->fMark = 1; + Ntl_ManForEachCoNet( p, pNet, i ) + pNet->fMark = 1; +} + +/**Function************************************************************* + + Synopsis [Unmarks the CI/CO nets.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ntl_ManUnmarkCiCoNets( Ntl_Man_t * p ) +{ + Ntl_Net_t * pNet; + int i; + Ntl_ManForEachCiNet( p, pNet, i ) + pNet->fMark = 0; + Ntl_ManForEachCoNet( p, pNet, i ) + pNet->fMark = 0; +} + +/**Function************************************************************* + + Synopsis [Unmarks the CI/CO nets.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ntl_ManCheckNetsAreNotMarked( Ntl_Mod_t * pModel ) +{ + Ntl_Net_t * pNet; + int i; + Ntl_ModelForEachNet( pModel, pNet, i ) + assert( pNet->fMark == 0 ); + return 1; +} + //////////////////////////////////////////////////////////////////////// /// END OF FILE /// //////////////////////////////////////////////////////////////////////// |