| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | //====================================================================================================================== | ||
| 2 | /* | ||
| 3 | POLYFLOAT - Extended precision floating points | ||
| 4 | Copyright : POLYFLOAT Contributors & Maintainers | ||
| 5 | SPDX-License-Identifier: BSL-1.0 | ||
| 6 | */ | ||
| 7 | //====================================================================================================================== | ||
| 8 | #pragma once | ||
| 9 | |||
| 10 | #include <polyfloat/details/callable.hpp> | ||
| 11 | #include <polyfloat/types/concepts.hpp> | ||
| 12 | #include <polyfloat/types/traits.hpp> | ||
| 13 | #include <type_traits> | ||
| 14 | #include <polyfloat/module/math/exp.hpp> | ||
| 15 | |||
| 16 | namespace plf | ||
| 17 | { | ||
| 18 | |||
| 19 | template<typename Options> | ||
| 20 | struct cosh_t : plf::elementwise_callable<cosh_t, eve::cosh_t, Options, raw_option, pedantic_option> | ||
| 21 | { | ||
| 22 | 150 | template<concepts::polyfloat_like Z> POLYFLOAT_ABI constexpr Z operator()(Z z) const noexcept | |
| 23 | { | ||
| 24 | 150 | return POLYFLOAT_CALL(z); | |
| 25 | } | ||
| 26 | |||
| 27 | 140 | POLYFLOAT_CALLABLE_OBJECT(cosh_t, cosh_); | |
| 28 | }; | ||
| 29 | //====================================================================================================================== | ||
| 30 | //! @addtogroup math | ||
| 31 | //! @{ | ||
| 32 | //! @var cosh | ||
| 33 | //! @brief return the hyperbolic cosine value. | ||
| 34 | //! | ||
| 35 | //! @groupheader{Header file} | ||
| 36 | //! | ||
| 37 | //! @code | ||
| 38 | //! #include <polyfloat/core.hpp> | ||
| 39 | //! @endcode | ||
| 40 | //! | ||
| 41 | //! @groupheader{Callable Signatures} | ||
| 42 | //! | ||
| 43 | //! @code | ||
| 44 | //! namespace polyfloat | ||
| 45 | //! { | ||
| 46 | //! template<polyfloat::concepts::polyfloat_like T> constexpr auto cosh(T z) noexcept; | ||
| 47 | //! } | ||
| 48 | //! @endcode | ||
| 49 | //! | ||
| 50 | //! **Parameters** | ||
| 51 | //! | ||
| 52 | //! * `z`: Value to process. | ||
| 53 | //! | ||
| 54 | //! **Return value** | ||
| 55 | //! | ||
| 56 | //! Returns the hyperbolicosine of z. | ||
| 57 | //! | ||
| 58 | //! @groupheader{Example} | ||
| 59 | //! | ||
| 60 | //! @godbolt{doc/math/cosh.cpp} | ||
| 61 | //====================================================================================================================== | ||
| 62 | |||
| 63 | inline constexpr auto cosh = eve::functor<cosh_t>; | ||
| 64 | //====================================================================================================================== | ||
| 65 | //! @} | ||
| 66 | //====================================================================================================================== | ||
| 67 | } | ||
| 68 | |||
| 69 | namespace plf::_ | ||
| 70 | { | ||
| 71 | |||
| 72 | 140 | template<typename T, eve::callable_options O> constexpr auto cosh_(POLYFLOAT_DELAY(), O const& o, T a0) noexcept | |
| 73 | { | ||
| 74 | using u_t = eve::underlying_type_t<T>; | ||
| 75 | 140 | auto inf = is_not_finite(a0); | |
| 76 | 140 | T ovflimitmln2 = maxlog(as(a0)) - log_2(as(a0)); | |
| 77 | 140 | auto aa0 = plf::abs(a0); | |
| 78 | 140 | auto x = plf::if_else(inf, zero, aa0); | |
| 79 | 140 | auto t = plf::exp[o](x); | |
| 80 | 140 | auto invt = if_else(x > 22, eve::zero, plf::rec[pedantic](t)); | |
| 81 | 140 | auto c = plf::average(t, invt); | |
| 82 | 140 | auto test = (x < ovflimitmln2) || inf; | |
| 83 |
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140 | if (eve::all(test)) return if_else(inf, aa0, c); |
| 84 | ✗ | auto w = plf::exp[o](x * half(eve::as<T>())); | |
| 85 | ✗ | t = eve::half(eve::as<u_t>()) * w; | |
| 86 | ✗ | t *= w; | |
| 87 | ✗ | c = if_else(test, c, t); | |
| 88 | ✗ | return if_else(inf, aa0, c); | |
| 89 | } | ||
| 90 | } | ||
| 91 |