109 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++1410 11// <experimental/simd>12//13// [simd.class]14// simd() noexcept = default;15 16#include "../test_utils.h"17#include <experimental/simd>18 19namespace ex = std::experimental::parallelism_v2;20 21// See https://www.open-std.org/jtc1/sc22/WG21/docs/papers/2019/n4808.pdf22// Default initialization performs no initialization of the elements; value-initialization initializes each element with T().23// Thus, default initialization leaves the elements in an indeterminate state.24template <class T, std::size_t>25struct CheckSimdDefaultCtor {26 template <class SimdAbi>27 void operator()() {28 static_assert(std::is_nothrow_default_constructible_v<ex::simd<T, SimdAbi>>);29 ex::simd<T, SimdAbi> pure_simd;30 // trash value in default ctor31 static_assert(pure_simd.size() > 0);32 }33};34 35template <class T, std::size_t>36struct CheckSimdDefaultCopyCtor {37 template <class SimdAbi>38 void operator()() {39 ex::simd<T, SimdAbi> pure_simd([](T i) { return i; });40 constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;41 std::array<T, array_size> expected_value;42 for (size_t i = 0; i < array_size; ++i)43 expected_value[i] = pure_simd[i];44 45 static_assert(std::is_nothrow_copy_constructible_v<ex::simd<T, SimdAbi>>);46 ex::simd<T, SimdAbi> from_copy_ctor(pure_simd);47 assert_simd_values_equal<array_size>(from_copy_ctor, expected_value);48 }49};50 51template <class T, std::size_t>52struct CheckSimdDefaultMoveCtor {53 template <class SimdAbi>54 void operator()() {55 ex::simd<T, SimdAbi> pure_simd([](T i) { return i; });56 constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;57 std::array<T, array_size> expected_value;58 for (size_t i = 0; i < array_size; ++i)59 expected_value[i] = pure_simd[i];60 61 static_assert(std::is_nothrow_move_constructible_v<ex::simd<T, SimdAbi>>);62 ex::simd<T, SimdAbi> from_move_ctor(std::move(pure_simd));63 assert_simd_values_equal<array_size>(from_move_ctor, expected_value);64 }65};66 67template <class T, std::size_t>68struct CheckSimdDefaultCopyAssignment {69 template <class SimdAbi>70 void operator()() {71 ex::simd<T, SimdAbi> pure_simd([](T i) { return i; });72 constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;73 std::array<T, array_size> expected_value;74 for (size_t i = 0; i < array_size; ++i)75 expected_value[i] = pure_simd[i];76 77 static_assert(std::is_nothrow_copy_assignable_v<ex::simd<T, SimdAbi>>);78 ex::simd<T, SimdAbi> from_copy_assignment;79 from_copy_assignment = pure_simd;80 assert_simd_values_equal<array_size>(from_copy_assignment, expected_value);81 }82};83 84template <class T, std::size_t>85struct CheckSimdDefaultMoveAssignment {86 template <class SimdAbi>87 void operator()() {88 ex::simd<T, SimdAbi> pure_simd([](T i) { return i; });89 constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;90 std::array<T, array_size> expected_value;91 for (size_t i = 0; i < array_size; ++i)92 expected_value[i] = pure_simd[i];93 94 static_assert(std::is_nothrow_move_assignable_v<ex::simd<T, SimdAbi>>);95 ex::simd<T, SimdAbi> from_move_assignment;96 from_move_assignment = std::move(pure_simd);97 assert_simd_values_equal<array_size>(from_move_assignment, expected_value);98 }99};100 101int main(int, char**) {102 test_all_simd_abi<CheckSimdDefaultCtor>();103 test_all_simd_abi<CheckSimdDefaultCopyCtor>();104 test_all_simd_abi<CheckSimdDefaultMoveCtor>();105 test_all_simd_abi<CheckSimdDefaultCopyAssignment>();106 test_all_simd_abi<CheckSimdDefaultMoveAssignment>();107 return 0;108}109