Difference between revisions of "DJBFFT"
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| − | + | = Introduction to DJBFFT = | |
djbfft is an extremely fast library for floating-point convolution. djbfft provides power-of-2 complex FFTs, real FFTs at twice the speed, and fast multiplication of complex arrays. Single precision and double precision are equally supported. The djbfft algorithms may be up to twice as fast as the [[FFTW]] algorithms. | djbfft is an extremely fast library for floating-point convolution. djbfft provides power-of-2 complex FFTs, real FFTs at twice the speed, and fast multiplication of complex arrays. Single precision and double precision are equally supported. The djbfft algorithms may be up to twice as fast as the [[FFTW]] algorithms. | ||
| − | + | <b>Homepage:</b> http://cr.yp.to/djbfft.html/ | |
| − | + | = Non-Multilib or Multilib = | |
The installation prefix for djbfft is provided by the file conf-home. The default location is /usr/local/djbfft. The following sed will put djbfft into /usr: | The installation prefix for djbfft is provided by the file conf-home. The default location is /usr/local/djbfft. The following sed will put djbfft into /usr: | ||
| Line 23: | Line 23: | ||
sed -i 's@/usr/local/djbfft@/usr@' conf-home | sed -i 's@/usr/local/djbfft@/usr@' conf-home | ||
| − | Compilation of the djbfft can be optimized for a particular processor class. By default your processor is auto detected from Pentium, SPARC, or PowerPC. To set the processor type explicitly, issue the following sed replacing <PROCESSOR_FAMILY> with pentium, sparc, ppro, or idea for machine-independent code: | + | Compilation of the djbfft can be optimized for a particular processor class. By default your processor is auto detected from Pentium, SPARC, or PowerPC. When this package was installed on an AMD Athlon64 system, it detected the processor as SPARC. To set the processor type explicitly, issue the following sed replacing <PROCESSOR_FAMILY> with pentium, sparc, ppro, or idea for machine-independent code: |
sed -i 's/auto/<PROCESSOR_FAMILY>/' conf-opt | sed -i 's/auto/<PROCESSOR_FAMILY>/' conf-opt | ||
| Line 42: | Line 42: | ||
./speed | ./speed | ||
| − | Single-precision (r4 and c4) errors should be on the scale of | + | Single-precision (r4 and c4) errors should be on the scale of 10E-8. Double-precision (r8 and c8) errors should be on the scale of 10E-16. |
Install the package: | Install the package: | ||
| Line 48: | Line 48: | ||
make setup check | make setup check | ||
| − | = | + | = Contents = |
| − | + | {|style="text-align: left" | |
| + | |-valign="top" | ||
| + | !Installed Libraries: | ||
| + | |djbfft.a | ||
| + | |} | ||
| − | + | == Short Description == | |
| − | + | {|style="text-align: left" | |
| + | |-valign="top" | ||
| + | !djbfft.a: | ||
| + | |The library containing FFT functions. | ||
| + | |} | ||
Revision as of 09:34, 22 December 2006
| Download Source: | http://cr.yp.to/djbfft/djbfft-0.76.tar.gz |
|---|---|
| Download Patch: | http://svn.cross-lfs.org/svn/repos/patches/djbfft/djbfft-0.76-glibc2.4-1.patch |
| Download Patch: | http://svn.cross-lfs.org/svn/repos/patches/djbfft/djbfft-0.76-testsuite-1.patch |
Introduction to DJBFFT
djbfft is an extremely fast library for floating-point convolution. djbfft provides power-of-2 complex FFTs, real FFTs at twice the speed, and fast multiplication of complex arrays. Single precision and double precision are equally supported. The djbfft algorithms may be up to twice as fast as the FFTW algorithms.
Homepage: http://cr.yp.to/djbfft.html/
Non-Multilib or Multilib
The installation prefix for djbfft is provided by the file conf-home. The default location is /usr/local/djbfft. The following sed will put djbfft into /usr:
sed -i 's@/usr/local/djbfft@/usr@' conf-home
Compilation of the djbfft can be optimized for a particular processor class. By default your processor is auto detected from Pentium, SPARC, or PowerPC. When this package was installed on an AMD Athlon64 system, it detected the processor as SPARC. To set the processor type explicitly, issue the following sed replacing <PROCESSOR_FAMILY> with pentium, sparc, ppro, or idea for machine-independent code:
sed -i 's/auto/<PROCESSOR_FAMILY>/' conf-opt
Apply the patches:
patch -Np1 -i ../djbfft-0.76-testsuite-1.patch && patch -Np1 -i ../djbfft-0.76-glibc2.4-1.patch
Compile the package:
make
There are tests that come with djbfft, run these if desired:
./accuracy ./accuracy2 ./speed
Single-precision (r4 and c4) errors should be on the scale of 10E-8. Double-precision (r8 and c8) errors should be on the scale of 10E-16.
Install the package:
make setup check
Contents
| Installed Libraries: | djbfft.a |
|---|
Short Description
| djbfft.a: | The library containing FFT functions. |
|---|
