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-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14
10
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.pdf
22// 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 ctor
31 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

source code of libcxx/test/std/experimental/simd/simd.class/simd_ctor_default.pass.cpp