1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP_EXPERIMENTAL___SIMD_SIMD_H 11 #define _LIBCPP_EXPERIMENTAL___SIMD_SIMD_H 12 13 #include <__type_traits/is_same.h> 14 #include <__type_traits/remove_cvref.h> 15 #include <__utility/forward.h> 16 #include <cstddef> 17 #include <experimental/__config> 18 #include <experimental/__simd/abi_tag.h> 19 #include <experimental/__simd/declaration.h> 20 #include <experimental/__simd/internal_declaration.h> 21 #include <experimental/__simd/reference.h> 22 #include <experimental/__simd/traits.h> 23 #include <experimental/__simd/utility.h> 24 25 #if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL) 26 27 _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL 28 inline namespace parallelism_v2 { 29 30 // class template simd [simd.class] 31 // TODO: implement simd class 32 template <class _Tp, class _Abi> 33 class simd { 34 using _Impl = __simd_operations<_Tp, _Abi>; 35 using _Storage = typename _Impl::_SimdStorage; 36 37 _Storage __s_; 38 39 public: 40 using value_type = _Tp; 41 using reference = __simd_reference<_Tp, _Storage, value_type>; 42 using mask_type = simd_mask<_Tp, _Abi>; 43 using abi_type = _Abi; 44 size()45 static _LIBCPP_HIDE_FROM_ABI constexpr size_t size() noexcept { return simd_size_v<value_type, abi_type>; } 46 47 _LIBCPP_HIDE_FROM_ABI simd() noexcept = default; 48 49 // broadcast constructor 50 template <class _Up, enable_if_t<__can_broadcast_v<value_type, __remove_cvref_t<_Up>>, int> = 0> simd(_Up && __v)51 _LIBCPP_HIDE_FROM_ABI simd(_Up&& __v) noexcept : __s_(_Impl::__broadcast(static_cast<value_type>(__v))) {} 52 53 // implicit type conversion constructor 54 template <class _Up, 55 enable_if_t<!is_same_v<_Up, _Tp> && is_same_v<abi_type, simd_abi::fixed_size<size()>> && 56 __is_non_narrowing_convertible_v<_Up, value_type>, 57 int> = 0> simd(const simd<_Up,simd_abi::fixed_size<size ()>> & __v)58 _LIBCPP_HIDE_FROM_ABI simd(const simd<_Up, simd_abi::fixed_size<size()>>& __v) noexcept { 59 for (size_t __i = 0; __i < size(); __i++) { 60 (*this)[__i] = static_cast<value_type>(__v[__i]); 61 } 62 } 63 64 // generator constructor 65 template <class _Generator, enable_if_t<__can_generate_v<value_type, _Generator, size()>, int> = 0> simd(_Generator && __g)66 explicit _LIBCPP_HIDE_FROM_ABI simd(_Generator&& __g) noexcept 67 : __s_(_Impl::__generate(std::forward<_Generator>(__g))) {} 68 69 // scalar access [simd.subscr] 70 _LIBCPP_HIDE_FROM_ABI reference operator[](size_t __i) noexcept { return reference(__s_, __i); } 71 _LIBCPP_HIDE_FROM_ABI value_type operator[](size_t __i) const noexcept { return __s_.__get(__i); } 72 }; 73 74 template <class _Tp, class _Abi> 75 inline constexpr bool is_simd_v<simd<_Tp, _Abi>> = true; 76 77 template <class _Tp> 78 using native_simd = simd<_Tp, simd_abi::native<_Tp>>; 79 80 template <class _Tp, int _Np> 81 using fixed_size_simd = simd<_Tp, simd_abi::fixed_size<_Np>>; 82 83 } // namespace parallelism_v2 84 _LIBCPP_END_NAMESPACE_EXPERIMENTAL 85 86 #endif // _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL) 87 #endif // _LIBCPP_EXPERIMENTAL___SIMD_SIMD_H 88