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Old 06-04-2007, 10:55 AM
Simon Heinzle
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Default ISE and total equivalent gate count

Hi,

ISE's map report states a "Total equivalent gate count for design". Can this
equivalent gate count be used to compare roughly and very approximate to an
equivalent ASIC implementation?

Thanks,
Simon


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Old 06-04-2007, 07:30 PM
austin
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Default Re: ISE and total equivalent gate count

Simon,

That is the intent of this number. Of course, some say this number is
inflated (to discourage ASIC conversion), and others say it is "realistic."

I have no opinion on the matter. Making ASICs is hard enough without
any other factors, though.

Perhaps someone from our software team will reply. I am in San Diego at
DAC all week.

Austin
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Old 06-05-2007, 01:20 PM
Brian Drummond
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Default Re: ISE and total equivalent gate count

On Mon, 04 Jun 2007 10:30:58 -0700, austin <[email protected]> wrote:

>Simon,
>
>That is the intent of this number. Of course, some say this number is
>inflated (to discourage ASIC conversion), and others say it is "realistic."


I think it would be more useful if it was broken down a bit more; at
least into memory gate count, other block (PPC,DSP) gate count and good
old fashioned CLB fabric gate count.

Just an opinion.

- Brian
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Old 06-05-2007, 04:55 PM
austin
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Default Re: ISE and total equivalent gate count

Brian,

I got an email from my software 'cousins' in Longmont: the "gate count"
number is supplied by the hardware folks.

?

"We have met the enemy, and it is us!" (from the old Pogo cartoon)

So, we only have ourselves to blame it seems.

I will try to find out who supplies the 'gate count' and discuss what it
means.

Austin

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