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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_MASK_H
#define _LIBCPP_EXPERIMENTAL___SIMD_SIMD_MASK_H
#include <__type_traits/is_same.h>
#include <cstddef>
#include <experimental/__config>
#include <experimental/__simd/declaration.h>
#include <experimental/__simd/reference.h>
#include <experimental/__simd/traits.h>
#if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL
inline namespace parallelism_v2 {
// class template simd_mask [simd.mask.class]
// TODO: implement simd_mask class
template <class _Tp, class _Abi>
class simd_mask {
using _Impl = __mask_operations<_Tp, _Abi>;
using _Storage = typename _Impl::_MaskStorage;
_Storage __s_;
public:
using value_type = bool;
using reference = __simd_reference<_Tp, _Storage, value_type>;
using simd_type = simd<_Tp, _Abi>;
using abi_type = _Abi;
static _LIBCPP_HIDE_FROM_ABI constexpr size_t size() noexcept { return simd_type::size(); }
_LIBCPP_HIDE_FROM_ABI simd_mask() noexcept = default;
// broadcast constructor
_LIBCPP_HIDE_FROM_ABI explicit simd_mask(value_type __v) noexcept : __s_(_Impl::__broadcast(__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()>>, int> = 0>
_LIBCPP_HIDE_FROM_ABI simd_mask(const simd_mask<_Up, simd_abi::fixed_size<size()>>& __v) noexcept {
for (size_t __i = 0; __i < size(); __i++) {
(*this)[__i] = __v[__i];
}
}
// load constructor
template <class _Flags, enable_if_t<is_simd_flag_type_v<_Flags>, int> = 0>
_LIBCPP_HIDE_FROM_ABI simd_mask(const value_type* __mem, _Flags) {
_Impl::__load(__s_, _Flags::template __apply<simd_mask>(__mem));
}
// copy functions
template <class _Flags, enable_if_t<is_simd_flag_type_v<_Flags>, int> = 0>
_LIBCPP_HIDE_FROM_ABI void copy_from(const value_type* __mem, _Flags) {
_Impl::__load(__s_, _Flags::template __apply<simd_mask>(__mem));
}
template <class _Flags, enable_if_t<is_simd_flag_type_v<_Flags>, int> = 0>
_LIBCPP_HIDE_FROM_ABI void copy_to(value_type* __mem, _Flags) const {
_Impl::__store(__s_, _Flags::template __apply<simd_mask>(__mem));
}
// scalar access [simd.mask.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_mask_v<simd_mask<_Tp, _Abi>> = true;
template <class _Tp>
using native_simd_mask = simd_mask<_Tp, simd_abi::native<_Tp>>;
template <class _Tp, int _Np>
using fixed_size_simd_mask = simd_mask<_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_MASK_H
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