This project is a github mirror of CERN's VDT C++ Library implementing fast implementations of common mathematical functions. I'm providing a mirror for convenience and to add some tweaks to the buildsystem and interface to help usability in other projects.
As it is a mirror, if you use this code, neither support nor performance can be guaranteed - you should contact the developers!
Reproduced below is the original ReadMe.txt which provides further
details on the project, authors and license conditions.
VDT is a library of mathematical functions, implemented in double and single precision. The implementation is fast and with the aid of modern compilers (e.g. gcc 4.7) autovectorisable. For more information visit https://svnweb.cern.ch/trac/vdt
The basic idea is to exploit Pade polynomials. A lot of ideas were inspired by the cephes math library (by Stephen L. Moshier, moshier@na-net.ornl.gov) as well as portions of actual code. The Cephes library can be found here: http://www.netlib.org/cephes
Implemented functions
- log
- exp
- sin
- cos
- tan
- asin
- acos
- atan
- inverse sqrt
- inverse (faster than division, based on isqrt)
To compile it:
cmake -DCMAKE_INSTALL_PREFIX=$THEINSTALLDIR .
make
make install
If you would like to compile the executables necessary for the diagnostics (cpu and arithmetic performance measurements) type
cmake -D DIAG=1 .
make
The executables will be put in the /bin directory.
Copyright Danilo Piparo, Vincenzo Innocente, Thomas Hauth (CERN) 2012
VDT is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser Public License for more details.
You should have received a copy of the GNU Lesser Public License along with this program. If not, see http://www.gnu.org/licenses/.