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39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_MATH_DETAIL_COSP_HPP
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#define SPROUT_MATH_DETAIL_COSP_HPP
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#include <sprout/config.hpp>
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namespace sprout {
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namespace math {
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namespace detail {
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template<typename T>
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inline SPROUT_CONSTEXPR T
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cosp_impl(T x2) {
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return (((((((
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-1.13585365213876817300e-11) * x2
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+ 2.08757008419747316778e-9) * x2
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- 2.75573141792967388112e-7) * x2
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+ 2.48015872888517045348e-5) * x2
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- 1.38888888888730564116e-3) * x2
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+ 4.16666666666665929218e-2) * x2
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- 0.5) * x2
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+ 1.0
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;
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}
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template<typename T>
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inline SPROUT_CONSTEXPR T
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cosp(T x) {
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return sprout::math::detail::cosp_impl(x * x);
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}
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} // namespace detail
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} // namespace math
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} // namespace sprout
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#endif // #ifndef SPROUT_MATH_DETAIL_COSP_HPP
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