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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_EXPERIMENTAL___SIMD_SIMD_H
#define _LIBCPP_EXPERIMENTAL___SIMD_SIMD_H
#include <__type_traits/is_same.h>
#include <__type_traits/remove_cvref.h>
#include <__utility/forward.h>
#include <cstddef>
#include <experimental/__config>
#include <experimental/__simd/abi_tag.h>
#include <experimental/__simd/declaration.h>
#include <experimental/__simd/internal_declaration.h>
#include <experimental/__simd/reference.h>
#include <experimental/__simd/traits.h>
#include <experimental/__simd/utility.h>
#if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL
inline namespace parallelism_v2 {
// class template simd [simd.class]
// TODO: implement simd class
template <class _Tp, class _Abi>
class simd {
using _Impl = __simd_operations<_Tp, _Abi>;
using _Storage = typename _Impl::_SimdStorage;
_Storage __s_;
public:
using value_type = _Tp;
using reference = __simd_reference<_Tp, _Storage, value_type>;
using mask_type = simd_mask<_Tp, _Abi>;
using abi_type = _Abi;
static _LIBCPP_HIDE_FROM_ABI constexpr size_t size() noexcept { return simd_size_v<value_type, abi_type>; }
_LIBCPP_HIDE_FROM_ABI simd() noexcept = default;
// broadcast constructor
template <class _Up, enable_if_t<__can_broadcast_v<value_type, __remove_cvref_t<_Up>>, int> = 0>
_LIBCPP_HIDE_FROM_ABI simd(_Up&& __v) noexcept : __s_(_Impl::__broadcast(static_cast<value_type>(__v))) {}
// implicit type conversion constructor
template <class _Up,
enable_if_t<!is_same_v<_Up, _Tp> && is_same_v<abi_type, simd_abi::fixed_size<size()>> &&
__is_non_narrowing_convertible_v<_Up, value_type>,
int> = 0>
_LIBCPP_HIDE_FROM_ABI simd(const simd<_Up, simd_abi::fixed_size<size()>>& __v) noexcept {
for (size_t __i = 0; __i < size(); __i++) {
(*this)[__i] = static_cast<value_type>(__v[__i]);
}
}
// generator constructor
template <class _Generator, enable_if_t<__can_generate_v<value_type, _Generator, size()>, int> = 0>
explicit _LIBCPP_HIDE_FROM_ABI simd(_Generator&& __g) noexcept
: __s_(_Impl::__generate(std::forward<_Generator>(__g))) {}
// scalar access [simd.subscr]
_LIBCPP_HIDE_FROM_ABI reference operator[](size_t __i) noexcept { return reference(__s_, __i); }
_LIBCPP_HIDE_FROM_ABI value_type operator[](size_t __i) const noexcept { return __s_.__get(__i); }
};
template <class _Tp, class _Abi>
inline constexpr bool is_simd_v<simd<_Tp, _Abi>> = true;
template <class _Tp>
using native_simd = simd<_Tp, simd_abi::native<_Tp>>;
template <class _Tp, int _Np>
using fixed_size_simd = simd<_Tp, simd_abi::fixed_size<_Np>>;
} // namespace parallelism_v2
_LIBCPP_END_NAMESPACE_EXPERIMENTAL
#endif // _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
#endif // _LIBCPP_EXPERIMENTAL___SIMD_SIMD_H
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