diff options
Diffstat (limited to 'boost/math/special_functions/erf.hpp')
| -rw-r--r-- | boost/math/special_functions/erf.hpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/boost/math/special_functions/erf.hpp b/boost/math/special_functions/erf.hpp index 1abb59177f..e67332a61a 100644 --- a/boost/math/special_functions/erf.hpp +++ b/boost/math/special_functions/erf.hpp @@ -978,6 +978,59 @@ T erf_imp(T z, bool invert, const Policy& pol, const mpl::int_<113>& t) return result; } // template <class T, class Lanczos>T erf_imp(T z, bool invert, const Lanczos& l, const mpl::int_<113>& t) +template <class T, class Policy, class tag> +struct erf_initializer +{ + struct init + { + init() + { + do_init(tag()); + } + static void do_init(const mpl::int_<0>&){} + static void do_init(const mpl::int_<53>&) + { + boost::math::erf(static_cast<T>(1e-12), Policy()); + boost::math::erf(static_cast<T>(0.25), Policy()); + boost::math::erf(static_cast<T>(1.25), Policy()); + boost::math::erf(static_cast<T>(2.25), Policy()); + boost::math::erf(static_cast<T>(4.25), Policy()); + boost::math::erf(static_cast<T>(5.25), Policy()); + } + static void do_init(const mpl::int_<64>&) + { + boost::math::erf(static_cast<T>(1e-12), Policy()); + boost::math::erf(static_cast<T>(0.25), Policy()); + boost::math::erf(static_cast<T>(1.25), Policy()); + boost::math::erf(static_cast<T>(2.25), Policy()); + boost::math::erf(static_cast<T>(4.25), Policy()); + boost::math::erf(static_cast<T>(5.25), Policy()); + } + static void do_init(const mpl::int_<113>&) + { + boost::math::erf(static_cast<T>(1e-22), Policy()); + boost::math::erf(static_cast<T>(0.25), Policy()); + boost::math::erf(static_cast<T>(1.25), Policy()); + boost::math::erf(static_cast<T>(2.125), Policy()); + boost::math::erf(static_cast<T>(2.75), Policy()); + boost::math::erf(static_cast<T>(3.25), Policy()); + boost::math::erf(static_cast<T>(5.25), Policy()); + boost::math::erf(static_cast<T>(7.25), Policy()); + boost::math::erf(static_cast<T>(11.25), Policy()); + boost::math::erf(static_cast<T>(12.5), Policy()); + } + void force_instantiate()const{} + }; + static const init initializer; + static void force_instantiate() + { + initializer.force_instantiate(); + } +}; + +template <class T, class Policy, class tag> +const typename erf_initializer<T, Policy, tag>::init erf_initializer<T, Policy, tag>::initializer; + } // namespace detail template <class T, class Policy> @@ -1017,6 +1070,8 @@ inline typename tools::promote_args<T>::type erf(T z, const Policy& /* pol */) BOOST_MATH_INSTRUMENT_CODE("tag_type = " << typeid(tag_type).name()); + detail::erf_initializer<value_type, forwarding_policy, tag_type>::force_instantiate(); // Force constants to be initialized before main + return policies::checked_narrowing_cast<result_type, forwarding_policy>(detail::erf_imp( static_cast<value_type>(z), false, @@ -1061,6 +1116,8 @@ inline typename tools::promote_args<T>::type erfc(T z, const Policy& /* pol */) BOOST_MATH_INSTRUMENT_CODE("tag_type = " << typeid(tag_type).name()); + detail::erf_initializer<value_type, forwarding_policy, tag_type>::force_instantiate(); // Force constants to be initialized before main + return policies::checked_narrowing_cast<result_type, forwarding_policy>(detail::erf_imp( static_cast<value_type>(z), true, |