| Copyright (c) 2013 Julien Pommier ( pommier@modartt.com ) |
| |
| Based on original fortran 77 code from FFTPACKv4 from NETLIB |
| (http://www.netlib.org/fftpack), authored by Dr Paul Swarztrauber |
| of NCAR, in 1985. |
| |
| As confirmed by the NCAR fftpack software curators, the following |
| FFTPACKv5 license applies to FFTPACKv4 sources. My changes are |
| released under the same terms. |
| |
| FFTPACK license: |
| |
| http://www.cisl.ucar.edu/css/software/fftpack5/ftpk.html |
| |
| Copyright (c) 2004 the University Corporation for Atmospheric |
| Research ("UCAR"). All rights reserved. Developed by NCAR's |
| Computational and Information Systems Laboratory, UCAR, |
| www.cisl.ucar.edu. |
| |
| Redistribution and use of the Software in source and binary forms, |
| with or without modification, is permitted provided that the |
| following conditions are met: |
| |
| - Neither the names of NCAR's Computational and Information Systems |
| Laboratory, the University Corporation for Atmospheric Research, |
| nor the names of its sponsors or contributors may be used to |
| endorse or promote products derived from this Software without |
| specific prior written permission. |
| |
| - Redistributions of source code must retain the above copyright |
| notices, this list of conditions, and the disclaimer below. |
| |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions, and the disclaimer below in the |
| documentation and/or other materials provided with the |
| distribution. |
| |
| THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT |
| HOLDERS BE LIABLE FOR ANY CLAIM, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE |
| SOFTWARE. |
| |
| |
| PFFFT : a Pretty Fast FFT. |
| |
| This file is largerly based on the original FFTPACK implementation, modified in |
| order to take advantage of SIMD instructions of modern CPUs. |
