very strange QuartusII 7.1 synthesis Tool results

Hi,

Thanks for your reply. I understand what you say. But the point for me is that, according to my logic in the design only one PSELS1 or PSELS2 or PSELS3 or PSELD can be active. I am not really concerned about the logic. My only point is, since all the above select signals are mutually exclusive, any just by reordering the select signals, how can the tool synthesize in a different.

If you don't mind, could you just try to synthesize the design and see the results. It shouldn't take much time, the sysnthesis takes just under a minute of time.

some how, i feel the results are strange. To look into detail, i went and checked the synthesis results of the individual entities, this is where the true problem was realised. for each different ordering used by the (case statements) the LUT's used by modules APBS1, APBS2 and APBS3 was different, where as in general, all of them are same size and same logic except some initial value for registers in these modules.

Therefore, each of them must contain same amount of LUT's.

Regards,

Anil.