This paper describes the
Expressive Velocity Enginelibrary, an object oriented C++ library designed to ease the process of writing efficient numerical applications using AltiVec, the SIMD extension designed by Apple, Motorola and IBM. AltiVec-powered applications typically show off a relative speed up of 4 to 16 but need a complex and awkward programmation style. By using various template metaprogramming techniques, E.V.E. provides an easy to use, STL-like, interface that allows developer to quickly write efficient and easy to read code. Typical applications written with E.V.E. can benefit from a large fraction of theorical maximum speed up while being written as simple C++ arithmetic code.