tools/detail/rational_horner1_2.hpp

0001 //  (C) Copyright John Maddock 2007.
0002 //  Use, modification and distribution are subject to the
0003 //  Boost Software License, Version 1.0. (See accompanying file
0004 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005 //
0006 //  This file is machine generated, do not edit by hand
0007
0008 // Polynomial evaluation using Horners rule
0009 #ifndef BOOST_MATH_TOOLS_POLY_RAT_2_HPP
0010 #define BOOST_MATH_TOOLS_POLY_RAT_2_HPP
0011
0012 namespace boost{ namespace math{ namespace tools{ namespace detail{
0013
0014 template <class T, class U, class V>
0015 BOOST_MATH_GPU_ENABLED inline V evaluate_rational_c_imp(const T*, const U*, const V&, const boost::math::integral_constant<int, 0>*) BOOST_MATH_NOEXCEPT(V)
0016 {
0017    return static_cast<V>(0);
0018 }
0019
0020 template <class T, class U, class V>
0021 BOOST_MATH_GPU_ENABLED inline V evaluate_rational_c_imp(const T* a, const U* b, const V&, const boost::math::integral_constant<int, 1>*) BOOST_MATH_NOEXCEPT(V)
0022 {
0023    return static_cast<V>(a[0]) / static_cast<V>(b[0]);
0024 }
0025
0026 template <class T, class U, class V>
0027 BOOST_MATH_GPU_ENABLED inline V evaluate_rational_c_imp(const T* a, const U* b, const V& x, const boost::math::integral_constant<int, 2>*) BOOST_MATH_NOEXCEPT(V)
0028 {
0029    if((-1 <= x) && (x <= 1))
0030      return static_cast<V>((a[1] * x + a[0]) / (b[1] * x + b[0]));
0031    else
0032    {
0033       V z = 1 / x;
0034       return static_cast<V>((a[0] * z + a[1]) / (b[0] * z + b[1]));
0035    }
0036 }
0037
0038
0039 }}}} // namespaces
0040
0041 #endif // include guard
0042