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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_UTILITY_H
#define _LIBCPP_EXPERIMENTAL___SIMD_UTILITY_H
#include <__type_traits/is_arithmetic.h>
#include <__type_traits/is_const.h>
#include <__type_traits/is_constant_evaluated.h>
#include <__type_traits/is_convertible.h>
#include <__type_traits/is_same.h>
#include <__type_traits/is_unsigned.h>
#include <__type_traits/is_volatile.h>
#include <__type_traits/void_t.h>
#include <__utility/declval.h>
#include <__utility/integer_sequence.h>
#include <cstdint>
#include <limits>
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
#if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL
inline namespace parallelism_v2 {
template <class _Tp>
inline constexpr bool __is_vectorizable_v =
is_arithmetic_v<_Tp> && !is_const_v<_Tp> && !is_volatile_v<_Tp> && !is_same_v<_Tp, bool>;
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI auto __choose_mask_type() {
if constexpr (sizeof(_Tp) == 1) {
return uint8_t{};
} else if constexpr (sizeof(_Tp) == 2) {
return uint16_t{};
} else if constexpr (sizeof(_Tp) == 4) {
return uint32_t{};
} else if constexpr (sizeof(_Tp) == 8) {
return uint64_t{};
}
# ifndef _LIBCPP_HAS_NO_INT128
else if constexpr (sizeof(_Tp) == 16) {
return __uint128_t{};
}
# endif
else
static_assert(sizeof(_Tp) == 0, "Unexpected size");
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI auto constexpr __set_all_bits(bool __v) {
return __v ? (numeric_limits<decltype(__choose_mask_type<_Tp>())>::max()) : 0;
}
template <class _From, class _To, class = void>
inline constexpr bool __is_non_narrowing_convertible_v = false;
template <class _From, class _To>
inline constexpr bool __is_non_narrowing_convertible_v<_From, _To, std::void_t<decltype(_To{std::declval<_From>()})>> =
true;
template <class _Tp, class _Up>
inline constexpr bool __can_broadcast_v =
(__is_vectorizable_v<_Up> && __is_non_narrowing_convertible_v<_Up, _Tp>) ||
(!__is_vectorizable_v<_Up> && is_convertible_v<_Up, _Tp>) || is_same_v<_Up, int> ||
(is_same_v<_Up, unsigned int> && is_unsigned_v<_Tp>);
template <class _Tp, class _Generator, std::size_t _Idx, class = void>
inline constexpr bool __is_well_formed = false;
template <class _Tp, class _Generator, std::size_t _Idx>
inline constexpr bool
__is_well_formed<_Tp,
_Generator,
_Idx,
std::void_t<decltype(std::declval<_Generator>()(integral_constant<size_t, _Idx>()))>> =
__can_broadcast_v<_Tp, decltype(std::declval<_Generator>()(integral_constant<size_t, _Idx>()))>;
template <class _Tp, class _Generator, std::size_t... _Idxes>
_LIBCPP_HIDE_FROM_ABI constexpr bool __can_generate(index_sequence<_Idxes...>) {
return (true && ... && __is_well_formed<_Tp, _Generator, _Idxes>);
}
template <class _Tp, class _Generator, std::size_t _Size>
inline constexpr bool __can_generate_v = experimental::__can_generate<_Tp, _Generator>(make_index_sequence<_Size>());
} // namespace parallelism_v2
_LIBCPP_END_NAMESPACE_EXPERIMENTAL
#endif // _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
_LIBCPP_POP_MACROS
#endif // _LIBCPP_EXPERIMENTAL___SIMD_UTILITY_H
|
