Difference between revisions of "DJBFFT"

From CBLFS
Jump to navigationJump to search
(Created page.)
 
Line 11: Line 11:
 
|}
 
|}
  
== Introduction to DJBFFT ==
+
= 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.
  
'''djbfft Homepage:''' http://cr.yp.to/djbfft.html
+
<b>Homepage:</b> http://cr.yp.to/djbfft.html/
  
== Non-Multilib or Multilib ==
+
= 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 10^-8. Double-precision (r8 and c8) errors should be on the scale of 10^-16.
+
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
  
== Installed Files ==
+
= Contents =
  
* '''Installed Libraries:''' djbfft.a
+
{|style="text-align: left"
 +
|-valign="top"
 +
!Installed Libraries:
 +
|djbfft.a
 +
|}
  
=== Short Description ===
+
== Short Description ==
  
* '''djbfft.a:''' The fft library.
+
{|style="text-align: left"
 +
|-valign="top"
 +
!djbfft.a:
 +
|The library containing FFT functions.
 +
|}

Revision as of 08:34, 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.
Retrieved from "?title=DJBFFT&oldid=6051"