cpml

"cpml" was originally developed by Tavis Ormandy for benchmarking the Compaq Portable Math Library[1] against libm on Alpha bases systems. You can read more about his project and original code at http://taviso.decsystem.org/cpml.html

Looking for similar benchmarks for AMD's LibM[2], I found and adapted his code to my needs (x86_64 Opterons). Tavis gave me permission to release my changes, with his original code being licensed under the GPLv2.

In no way is this software meant to be scientific, accurate or even correct. It was written solely to answer the question "Is it worth my time to investigate using these alternative math libraries?" There are current issues which reduce the accuracy of this code on AMD hardware, such as the direct use of the TSC being susceptible to drift. This may or may not be addressed in the future.

Future plans

• timing issues mentioned above. maybe.
• Intel MKL. Comparisons of one vendor's library on their competitor's hardware are suspect, but would be convenient for vendor library on vendor hardware comparisons.
• pretty print and parsable output options. I changed the original pretty print to be more parsable for my use.
• multiple runs, and averaging of those runs.

License

GPLv2. See the included COPYING file or http://www.gnu.org/licenses/

Warranty

There is none. If something breaks it's your problem. In other words:

BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Footnotes

[1] http://h21007.www2.hp.com/portal/site/dspp/menuitem.863c3e4cbcdc3f3515b49c108973a801/?ciid=a308e8749ee02110e8749ee02110275d6e10RCRD [2] http://developer.amd.com/libraries/libm/