Not if you use it to develop commercial applications, but free otherwise, see link below:

Certain versions of Sourcery VSIPL++ and Sourcery VSIPL, licensed under the GNU Public License, are available for free download.

On Wed, Oct 22, 2008 at 1:52 PM, Peng Yu <> wrote:
On Wed, Oct 22, 2008 at 1:56 AM, Paul Baxter <> wrote:
> From: "Peng Yu" <>
>> FFTW is the fastest FFT library. But its interface is in C. I'm
>> wondering if there is any ongoing project on FFT.
> You could try VSIPL++ at

If I'm correct, VSIPL is not free, right?

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