Problem: "Total equivalent gate count" in ISE missing

[Zerox100]

I have a problem with "Total equivalent gate count" in ISE. In new ise (12 or later) there s no "Total equivalent gate count"!!!! I am looking for option but there is no option. Has anybody faced this problem?

 

[TrickyDicky]

Gate count in FPGAs is rather meaningless, hence probably why its been removed.

 

[Zerox100]

But it shows the area of your design. It can be useful when you want to compare two architecture together.

 

[TrickyDicky]

No it doesnt. LUT usage is far more useful. A single LUT can contain anywhere between 1 and many gates, hence why gate count is a useless figure.

 

[Zerox100]

But when you use a LUT, You may use it full or only one gate of LUT. It is the problem. I know one LUT is equal to 6 gate. But most of LUT is partially used.

Because I need a gate comparison between two architecture it cant actually help me.
I recently found that "Total equivalent gate count" is removed in ISE10 and earlier. Is it good idea to install an old ISE?

 

[TrickyDicky]

LUTs have no gates. They are just a function of the 4/5/6 inputs. Hence they could be a single and gate or many gates. If you only use 2 inputs, the lut is fully utilised. You cannoy use part of a lut.

So to compare the two, use LUT and register count to compare.