| 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/core/abs.hpp> | ||
| 15 | |||
| 16 | namespace plf | ||
| 17 | { | ||
| 18 | |||
| 19 | template<typename Options> struct lerp_t : eve::strict_tuple_callable<lerp_t, Options, raw_option, pedantic_option> | ||
| 20 | { | ||
| 21 | template<typename... Ts> struct result : as_polyfloat_like<Ts...> | ||
| 22 | { | ||
| 23 | }; | ||
| 24 | |||
| 25 | template<concepts::polyfloat_like Z0, concepts::polyfloat_like Z1, concepts::polyfloat_like Z2> | ||
| 26 | 8 | POLYFLOAT_ABI typename result<Z0, Z1, Z2>::type constexpr operator()(Z0 z0, Z1 z1, Z2 z2) const noexcept | |
| 27 | { | ||
| 28 | 8 | return POLYFLOAT_CALL(z0, z1, z2); | |
| 29 | } | ||
| 30 | |||
| 31 | 8 | POLYFLOAT_CALLABLE_OBJECT(lerp_t, lerp_); | |
| 32 | }; | ||
| 33 | //====================================================================================================================== | ||
| 34 | //! @addtogroup core | ||
| 35 | //! @{ | ||
| 36 | //! @var lerp | ||
| 37 | //! @brief return the fused multiply add of the parameters. | ||
| 38 | //! | ||
| 39 | //! @groupheader{Header file} | ||
| 40 | //! | ||
| 41 | //! @code | ||
| 42 | //! #include <polyfloat/core.hpp> | ||
| 43 | //! @endcode | ||
| 44 | //! | ||
| 45 | //! @groupheader{Callable Signatures} | ||
| 46 | //! | ||
| 47 | //! @code | ||
| 48 | //! namespace polyfloat | ||
| 49 | //! { | ||
| 50 | //! template<polyfloat::concepts::polyfloat_like Z1, polyfloat_like Z2, polyfloat_like Z3> constexpr auto lerp(Z1 z1, Z2 z2, Z3 z3) noexcept; | ||
| 51 | //! } | ||
| 52 | //! @endcode | ||
| 53 | //! | ||
| 54 | //! **Parameters** | ||
| 55 | //! | ||
| 56 | //! * `z1`, `z2`, `z3`: Values to process. | ||
| 57 | //! | ||
| 58 | //! **Return value** | ||
| 59 | //! | ||
| 60 | //! The value of the interpolation (or extrapolation) between `z1` and `z2` is returned. | ||
| 61 | //! The call is semantically equivalent to `z1+z3*(z2-z1)` | ||
| 62 | //! | ||
| 63 | //! @groupheader{Example} | ||
| 64 | //! | ||
| 65 | //! @godbolt_todo{doc/core/lerp.cpp} | ||
| 66 | //====================================================================================================================== | ||
| 67 | |||
| 68 | inline constexpr auto lerp = eve::functor<lerp_t>; | ||
| 69 | //====================================================================================================================== | ||
| 70 | //! @} | ||
| 71 | //====================================================================================================================== | ||
| 72 | } | ||
| 73 | |||
| 74 | namespace plf::_ | ||
| 75 | { | ||
| 76 | template<typename Z1, typename Z2, typename Z3, eve::callable_options O> | ||
| 77 | 8 | constexpr auto lerp_(POLYFLOAT_DELAY(), O const&, Z1 const& x, Z2 const& y, Z3 const& z) noexcept | |
| 78 | { | ||
| 79 | using r_t = as_polyfloat_t<Z1, Z2, Z3>; | ||
| 80 | 12 | auto cvt = [](auto a) { return plf::convert(a, eve::as<eve::element_type_t<r_t>>()); }; | |
| 81 | 8 | auto a = cvt(x); | |
| 82 | 8 | auto b = cvt(y); | |
| 83 | 8 | auto t = cvt(z); | |
| 84 | 8 | return fma[pedantic](t, b, fnma[pedantic](t, a, a)); | |
| 85 | } | ||
| 86 | } | ||
| 87 |