\begin{table}[hpbt]
\begin{center}
\begin{tabular}{|c|c|c|c|c|c||c|}\hline
 Circuit   &\#CLBs  &\#IOBs  &\#DFF  &\#NETs  &\#PINs &\hfill  \\  \cline{1-6} \cline{1-6}
 c499      &74      &73      & -    &123     &409     &\hfill  \\ \cline{1-6}
 c1355     &74      &73      & -    &123     &408     &\hfill  \\ \cline{1-6}
 c1908     &147     &58      & -    &238     &780     &Mapped   \\ \cline{1-6}
 c2670     &210     &221     & -    &450     &1255    &into     \\ \cline{1-6}
 c3540     &373     &72      & -    &569     &1933    &XC2000   \\ \cline{1-6}
 c5315     &535     &301     & -    &936     &3004    &\hfill  \\ \cline{1-6}
 c6288     &833     &64      & -    &1472    &3438    &\hfill  \\ \cline{1-6}
 c7552     &611     &313     & -    &1057     &3318   &\hfill  \\ \hline \hline

 c3540     &283     &72      & -    &489     &1645    &\hfill  \\ \cline{1-6} 
 c5315     &377     &301     & -    &699     &2409    &\hfill \\ \cline{1-6}
 c6288     &833     &64      & -    &1472    &3438    &\hfill \\ \cline{1-6}
 c7552     &489     &313     & -    &921     &2924    &Mapped  \\ \cline{1-6}
 s5378     &381     &86      &179   &628     &2332    &into    \\ \cline{1-6}
 s9234     &454     &43      &288   &716     &2671    &XC3000  \\ \cline{1-6}
 s13207    &915     &154     &661   &1377    &5309    &\hfill  \\ \cline{1-6}
 s15850    &842     &102     &597   &1265    &4977    &\hfill    \\ \cline{1-6}
 s38584    &2904    &292     &1452  &3884    &17483   &\hfill \\ \hline
\end{tabular}
\caption{Benchmark circuit characteristics}
\label{tb:tb2}
\end{center}
\end{table}

