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| 2 | pj | 1 | This is FFTW, a collection of fast C routines to compute the Discrete |
| 2 | Fourier Transform in one or more dimensions. |
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| 3 | |||
| 4 | `OFFICIAL' CODE: |
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| 5 | |||
| 6 | The doc/ directory contains the manual in texinfo, postscript, info, |
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| 7 | and HTML formats. Frequently asked questions and answers can be found |
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| 8 | in the FAQ/ directory in a variety of formats (including HTML). |
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| 9 | |||
| 10 | The fftw/ directory contains the source code for the complex transforms, |
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| 11 | and the rfftw/ directory contains the source code for the real transforms. |
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| 12 | |||
| 13 | Large portions of the source are automatically generated by a program |
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| 14 | in the gensrc/ directory (written in Objective Caml). You do not need |
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| 15 | this program to use FFTW, since FFTW comes with a default set of |
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| 16 | pregenerated codelets. You are, however, welcome to look at and play |
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| 17 | with the generator (see the FFTW manual for more information). |
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| 18 | |||
| 19 | The threads/ directory contains an parallel version of FFTW (for |
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| 20 | shared-memory machines) that uses threads. See the "Multi-threaded |
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| 21 | FFTW" section of the manual for more information. |
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| 22 | |||
| 23 | The mpi/ directory contains a parallel version of FFTW for transforms |
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| 24 | on machines with MPI. (This code, unlike our other two parallel |
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| 25 | transforms, supports distributed memory machines.) See the "MPI FFTW" |
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| 26 | section of the manual for more information. |
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| 27 | |||
| 28 | fortran/ contains some constant definitions for using FFTW from |
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| 29 | Fortran (see the FFTW manual), and also a small example program. |
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| 30 | |||
| 31 | Installation instructions are provided in the manual (don't worry, it |
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| 32 | is straightforward). |
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| 33 | |||
| 34 | `UNOFFICIAL' CODE (for you to play with): |
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| 35 | |||
| 36 | matlab/ contains code that allows you to call FFTW from MATLAB. |
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| 37 | |||
| 38 | The cilk/ directory contains an parallel version of FFTW written in |
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| 39 | Cilk. Cilk is a cool C-like language in which you can write spawn |
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| 40 | foo() : foo will be executed in parallel with the main thread and the |
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| 41 | cost of spawn is just a few cycles (compare this with all the mess you |
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| 42 | have to do to create a posix thread and pay 3000 cycles for it). More |
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| 43 | info on Cilk can be found at http://supertech.lcs.mit.edu/cilk/. |
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| 44 | |||
| 45 | CONTACTS |
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| 46 | -------- |
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| 47 | |||
| 48 | FFTW was written by Matteo Frigo and Steven G. Johnson. Please send |
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| 49 | email to fftw@theory.lcs.mit.edu so that we can keep track of users |
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| 50 | and send you information about new releases. The latest version of |
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| 51 | FFTW, benchmarks, links, and other information can be found at the |
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| 52 | FFTW home page: http://theory.lcs.mit.edu/~fftw |