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Diffstat (limited to 'boost/multiprecision/detail/big_lanczos.hpp')
-rw-r--r-- | boost/multiprecision/detail/big_lanczos.hpp | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/boost/multiprecision/detail/big_lanczos.hpp b/boost/multiprecision/detail/big_lanczos.hpp new file mode 100644 index 0000000000..03d3203ec8 --- /dev/null +++ b/boost/multiprecision/detail/big_lanczos.hpp @@ -0,0 +1,39 @@ + +// Copyright (c) 2011 John Maddock +// Use, modification and distribution are subject to the +// Boost Software License, Version 1.0. (See accompanying file +// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +#ifndef BOOST_MP_BIG_LANCZOS +#define BOOST_MP_BIG_LANCZOS + +#include <boost/math/bindings/detail/big_lanczos.hpp> + +namespace boost{ namespace math{ + +namespace lanczos{ + +template <class T, class Policy> +struct lanczos; + +template<class Backend, boost::multiprecision::expression_template_option ExpressionTemplates, class Policy> +struct lanczos<multiprecision::number<Backend, ExpressionTemplates>, Policy> +{ + typedef typename boost::math::policies::precision<multiprecision::number<Backend, ExpressionTemplates>, Policy>::type precision_type; + typedef typename mpl::if_c< + precision_type::value <= 73, + lanczos13UDT, + typename mpl::if_c< + precision_type::value <= 122, + lanczos22UDT, + undefined_lanczos + >::type + >::type type; +}; + +} // namespace lanczos + +}} // namespaces + +#endif + |