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.traits]
14//template <class T, class Abi = simd_abi::compatible<T>> struct simd_size;
15//template <class T, class Abi = simd_abi::compatible<T>>
16//inline constexpr std::size_t ex::simd_size_v = ex::simd_size<T, Abi>::value;
17
18#include "../test_utils.h"
19
20namespace ex = std::experimental::parallelism_v2;
21
22struct CheckSimdSizeFixedDeduce {
23 template <class T, std::size_t N>
24 void check() {
25 static_assert(ex::simd_size_v<T, ex::simd_abi::fixed_size<N>> == N, "Simd size mismatch with abi fixed_size");
26 static_assert(ex::simd_size<T, ex::simd_abi::fixed_size<N>>::value == N, "Simd size mismatch with abi fixed_size");
27
28 static_assert(ex::simd_size_v<T, ex::simd_abi::deduce_t<T, N>> == N, "Simd size mismatch with abi deduce");
29 static_assert(ex::simd_size<T, ex::simd_abi::deduce_t<T, N>>::value == N, "Simd size mismatch with abi deduce");
30 }
31
32 template <class T, std::size_t... N>
33 void performChecks(std::index_sequence<N...>) {
34 (check<T, N + 1>(), ...);
35 }
36
37 template <class T>
38 void operator()() {
39 performChecks<T>(std::make_index_sequence<max_simd_size>{});
40 }
41};
42
43struct CheckSimdSizeScalarNativeCompatible {
44 template <class T>
45 void operator()() {
46 static_assert(ex::simd_size_v<T, ex::simd_abi::scalar> == 1);
47 static_assert(ex::simd_size<T, ex::simd_abi::scalar>::value == 1);
48
49 LIBCPP_STATIC_ASSERT(ex::simd_size<T, ex::simd_abi::compatible<T>>::value == 16 / sizeof(T));
50 LIBCPP_STATIC_ASSERT(ex::simd_size_v<T, ex::simd_abi::compatible<T>> == 16 / sizeof(T));
51
52 LIBCPP_STATIC_ASSERT(
53 ex::simd_size<T, ex::simd_abi::native<T>>::value == _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(T));
54 LIBCPP_STATIC_ASSERT(ex::simd_size_v<T, ex::simd_abi::native<T>> == _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(T));
55 }
56};
57
58template <class T, class Abi = ex::simd_abi::compatible<T>, class = void>
59struct has_simd_size : std::false_type {};
60
61template <class T, class Abi>
62struct has_simd_size<T, Abi, std::void_t<decltype(ex::simd_size<T, Abi>::value)>> : std::true_type {};
63
64struct CheckSimdSizeTraits {
65 template <class T>
66 void operator()() {
67 static_assert(has_simd_size<T>::value);
68 static_assert(!has_simd_size<ex::native_simd<T>>::value);
69
70 static_assert(has_simd_size<T, ex::simd_abi::scalar>::value);
71 static_assert(has_simd_size<T, ex::simd_abi::fixed_size<4>>::value);
72 static_assert(has_simd_size<T, ex::simd_abi::native<T>>::value);
73 static_assert(has_simd_size<T, ex::simd_abi::compatible<T>>::value);
74
75 static_assert(!has_simd_size<ex::simd_abi::native<T>, ex::simd_abi::native<T>>::value);
76 static_assert(!has_simd_size<ex::native_simd<T>, ex::simd_abi::native<T>>::value);
77 static_assert(!has_simd_size<ex::fixed_size_simd<T, 3>, ex::simd_abi::native<T>>::value);
78 static_assert(!has_simd_size<ex::fixed_size_simd_mask<T, 4>, ex::simd_abi::native<T>>::value);
79
80 static_assert(!has_simd_size<T, T>::value);
81 static_assert(!has_simd_size<T, ex::native_simd<T>>::value);
82 static_assert(!has_simd_size<T, ex::fixed_size_simd<T, 3>>::value);
83 static_assert(!has_simd_size<T, ex::fixed_size_simd_mask<T, 4>>::value);
84 }
85};
86
87int main(int, char**) {
88 types::for_each(arithmetic_no_bool_types(), CheckSimdSizeFixedDeduce());
89 types::for_each(arithmetic_no_bool_types(), CheckSimdSizeScalarNativeCompatible());
90 types::for_each(arithmetic_no_bool_types(), CheckSimdSizeTraits());
91 return 0;
92}
93

source code of libcxx/test/std/experimental/simd/simd.traits/simd_size.pass.cpp