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Altera_Forum's avatar
Altera_Forum
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15 years ago

Larger multipliers are faster?!

I'm designing some IIR filters in a Cyclone III, so I had a quick look to see how fast I could get a large multiplier to run. I used lpm_mult, with a latency of 2, and optimized for speed (latency 2 ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

You might actually get better performance by putting in a realistic timing requirement and seeing what performance you can achieve. You can continue to revise the requirement upward until it fails to meet timing (if your goal is to see "how fast" you can get it).

Also, you ought to use the RTL viewer to get an idea of what each multiplier produced in terms of logic.

Jake