What is VDT?

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) vectorisable.

VDT exploits also Pade polynomials. A lot of ideas were inspired by the cephes math library (by Stephen L. Moshier, moshi.nosp@m.er@n.nosp@m.a-net.nosp@m..orn.nosp@m.l.gov) as well as portions of actual code. The Cephes library can be found here: http://www.netlib.org/cephes

Implemented functions

• log
• exp
• sincos
• sin
• cos
• tan
• asin
• acos
• atan
• atan2
• inverse sqrt
• inverse (faster than division, based on isqrt)

Copyright Danilo Piparo, Vincenzo Innocente, Thomas Hauth (CERN) 2012-14

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/.