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15 lines
840 B
Text
15 lines
840 B
Text
FFTW is a free collection of fast C routines for computing the Discrete
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Fourier Transform in one or more dimensions. It includes complex, real,
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symmetric, and parallel transforms, and can handle arbitrary array sizes
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efficiently. FFTW is typically faster than other publically-available FFT
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implementations, and is even competitive with vendor-tuned libraries.
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By default non-portable binaries will be created. If you need to create
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a package that is shared among various machines, pass PORTABLE=yes to the
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script.
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To enable SSE or SSE2 SIMD optimizations pass SSE=yes or SSE2=yes respectively
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to the script. Enabling these will still create a portable package as fftw falls
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back to the standard code, if the optimized one isn't supported on the cpu.
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However, to be able to build them your cpu has to actually support those
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extensions.
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