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| 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_ALIGNED_TAG_H |
| 11 | #define _LIBCPP_EXPERIMENTAL___SIMD_ALIGNED_TAG_H |
| 12 | |
| 13 | #include <__config> |
| 14 | #include <__cstddef/size_t.h> |
| 15 | #include <__memory/assume_aligned.h> |
| 16 | #include <__type_traits/remove_const.h> |
| 17 | #include <experimental/__simd/traits.h> |
| 18 | |
| 19 | #if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL) |
| 20 | |
| 21 | _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL |
| 22 | inline namespace parallelism_v2 { |
| 23 | // memory alignment |
| 24 | struct element_aligned_tag { |
| 25 | template <class _Tp, class _Up = typename _Tp::value_type> |
| 26 | static constexpr size_t __alignment = alignof(_Up); |
| 27 | |
| 28 | template <class _Tp, class _Up> |
| 29 | static _LIBCPP_HIDE_FROM_ABI constexpr _Up* __apply(_Up* __ptr) { |
| 30 | return __ptr; |
| 31 | } |
| 32 | }; |
| 33 | |
| 34 | template <> |
| 35 | inline constexpr bool is_simd_flag_type_v<element_aligned_tag> = true; |
| 36 | |
| 37 | struct vector_aligned_tag { |
| 38 | template <class _Tp, class _Up = typename _Tp::value_type> |
| 39 | static constexpr size_t __alignment = memory_alignment_v<_Tp, remove_const_t<_Up>>; |
| 40 | |
| 41 | template <class _Tp, class _Up> |
| 42 | static _LIBCPP_HIDE_FROM_ABI constexpr _Up* __apply(_Up* __ptr) { |
| 43 | return std::__assume_aligned<__alignment<_Tp, _Up>, _Up>(__ptr); |
| 44 | } |
| 45 | }; |
| 46 | |
| 47 | template <> |
| 48 | inline constexpr bool is_simd_flag_type_v<vector_aligned_tag> = true; |
| 49 | |
| 50 | template <size_t _Np> |
| 51 | struct overaligned_tag { |
| 52 | template <class _Tp, class _Up = typename _Tp::value_type> |
| 53 | static constexpr size_t __alignment = _Np; |
| 54 | |
| 55 | template <class _Tp, class _Up> |
| 56 | static _LIBCPP_HIDE_FROM_ABI constexpr _Up* __apply(_Up* __ptr) { |
| 57 | return std::__assume_aligned<__alignment<_Tp, _Up>, _Up>(__ptr); |
| 58 | } |
| 59 | }; |
| 60 | |
| 61 | template <size_t _Np> |
| 62 | inline constexpr bool is_simd_flag_type_v<overaligned_tag<_Np>> = true; |
| 63 | |
| 64 | inline constexpr element_aligned_tag element_aligned{}; |
| 65 | |
| 66 | inline constexpr vector_aligned_tag vector_aligned{}; |
| 67 | |
| 68 | template <size_t _Np> |
| 69 | inline constexpr overaligned_tag<_Np> overaligned{}; |
| 70 | |
| 71 | } // namespace parallelism_v2 |
| 72 | _LIBCPP_END_NAMESPACE_EXPERIMENTAL |
| 73 | |
| 74 | #endif // _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL) |
| 75 | #endif // _LIBCPP_EXPERIMENTAL___SIMD_ALIGNED_TAG_H |
| 76 |
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