diff options
Diffstat (limited to 'src/base/seq/seqRetIter.c')
| -rw-r--r-- | src/base/seq/seqRetIter.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/src/base/seq/seqRetIter.c b/src/base/seq/seqRetIter.c index 6fe571f0..9c28c097 100644 --- a/src/base/seq/seqRetIter.c +++ b/src/base/seq/seqRetIter.c @@ -49,7 +49,7 @@ static void Seq_NodePrintInfoPlus( Abc_Obj_t * pNode ); SeeAlso [] ***********************************************************************/ -void Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtk, int fVerbose ) +int Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtk, int fVerbose ) { Abc_Seq_t * p = pNtk->pManFunc; Abc_Obj_t * pNode; @@ -76,7 +76,7 @@ void Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtk, int fVerbose if ( Delta == 0.0 ) { printf( "Cannot retime/map if the library does not have NAND2 or AND2.\n" ); - return; + return 0; } } // get the upper bound on the clock period @@ -90,8 +90,14 @@ void Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtk, int fVerbose } // make sure this clock period is feasible - assert( Seq_NtkMappingForPeriod( pNtk, FiMax, fVerbose ) ); - + if ( !Seq_NtkMappingForPeriod( pNtk, FiMax, fVerbose ) ) + { + printf( "Error: The upper bound on the clock period cannot be computed.\n" ); + printf( "The reason for this error may be the presence in the circuit of logic\n" ); + printf( "that is not reachable from the PIs. Mapping/retiming is not performed.\n" ); + return 0; + } + // search for the optimal clock period between 0 and nLevelMax FiBest = Seq_NtkMappingSearch_rec( pNtk, 0.0, FiMax, Delta, fVerbose ); @@ -99,6 +105,11 @@ void Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtk, int fVerbose RetValue = Seq_NtkMappingForPeriod( pNtk, FiBest, fVerbose ); assert( RetValue ); + // fix the problem with non-converged delays + Vec_PtrForEachEntry( p->vMapAnds, pNode, i ) + if ( Seq_NodeGetLValueP(pNode) < -ABC_INFINITY/2 ) + Seq_NodeSetLValueP( pNode, 0 ); + // experiment by adding an epsilon to all LValues // Vec_PtrForEachEntry( p->vMapAnds, pNode, i ) // Seq_NodeSetLValueP( pNode, Seq_NodeGetLValueP(pNode) - p->fEpsilon ); @@ -126,8 +137,18 @@ void Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtkOld, Abc_Ntk_t * pNtk, int fVerbose // print the result if ( fVerbose ) printf( "The best clock period is %6.2f.\n", FiBest ); - +/* + { + FILE * pTable; + pTable = fopen( "stats.txt", "a+" ); + fprintf( pTable, "%s ", pNtk->pName ); + fprintf( pTable, "%.2f ", FiBest ); + fprintf( pTable, "\n" ); + fclose( pTable ); + } +*/ // Seq_NodePrintInfo( Abc_NtkObj(pNtk, 847) ); + return 1; } /**Function************************************************************* |