120 lines
4.9 KiB
C++
120 lines
4.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// <experimental/simd>
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//
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// [simd.traits]
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// template <class T, class U = typename T::value_type> struct memory_alignment;
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// template <class T, class U = typename T::value_type>
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// inline constexpr std::size_t memory_alignment_v = memory_alignment<T, U>::value;
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#include "../test_utils.h"
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namespace ex = std::experimental::parallelism_v2;
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template <class T, std::size_t N>
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struct CheckMemoryAlignmentMask {
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template <class SimdAbi>
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void operator()() {
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LIBCPP_STATIC_ASSERT(
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ex::memory_alignment<ex::simd_mask<T, SimdAbi>>::value == bit_ceil(sizeof(bool) * ex::simd_size_v<T, SimdAbi>));
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LIBCPP_STATIC_ASSERT(
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ex::memory_alignment_v<ex::simd_mask<T, SimdAbi>> == bit_ceil(sizeof(bool) * ex::simd_size_v<T, SimdAbi>));
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}
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};
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template <class T, std::size_t N>
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struct CheckMemoryAlignmentLongDouble {
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template <class SimdAbi>
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void operator()() {
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if constexpr (std::is_same_v<T, long double>) {
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// on i686-w64-mingw32-clang++, the size of long double is 12 bytes. Disambiguation is needed.
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static_assert(
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ex::memory_alignment<ex::simd<T, SimdAbi>>::value == bit_ceil(sizeof(T) * ex::simd_size_v<T, SimdAbi>));
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static_assert(ex::memory_alignment_v<ex::simd<T, SimdAbi>> == bit_ceil(sizeof(T) * ex::simd_size_v<T, SimdAbi>));
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}
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}
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};
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struct CheckMemAlignmentFixedDeduce {
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template <class T, std::size_t N>
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void check() {
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if constexpr (!std::is_same_v<T, long double>) {
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static_assert(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::fixed_size<N>>> == sizeof(T) * bit_ceil(N),
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"Memory Alignment mismatch with abi fixed_size");
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static_assert(ex::memory_alignment<ex::simd<T, ex::simd_abi::fixed_size<N>>>::value == sizeof(T) * bit_ceil(N),
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"Memory Alignment mismatch with abi fixed_size");
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static_assert(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::deduce_t<T, N>>> == sizeof(T) * bit_ceil(N),
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"Memory Alignment mismatch with abi deduce");
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static_assert(ex::memory_alignment<ex::simd<T, ex::simd_abi::deduce_t<T, N>>>::value == sizeof(T) * bit_ceil(N),
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"Memory Alignment mismatch with abi deduce");
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}
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}
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template <class T, std::size_t... N>
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void performChecks(std::index_sequence<N...>) {
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(check<T, N + 1>(), ...);
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}
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template <class T>
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void operator()() {
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performChecks<T>(std::make_index_sequence<max_simd_size>{});
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}
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};
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struct CheckMemAlignmentScalarNativeCompatible {
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template <class T>
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void operator()() {
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if constexpr (!std::is_same_v<T, long double>) {
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static_assert(ex::memory_alignment<ex::simd<T, ex::simd_abi::scalar>>::value == sizeof(T));
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static_assert(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::scalar>> == sizeof(T));
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LIBCPP_STATIC_ASSERT(ex::memory_alignment<ex::simd<T, ex::simd_abi::compatible<T>>>::value == 16);
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LIBCPP_STATIC_ASSERT(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::compatible<T>>> == 16);
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LIBCPP_STATIC_ASSERT(
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ex::memory_alignment<ex::simd<T, ex::simd_abi::native<T>>>::value == _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES);
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LIBCPP_STATIC_ASSERT(
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ex::memory_alignment_v<ex::simd<T, ex::simd_abi::native<T>>> == _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES);
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}
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}
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};
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template <class T, class U = typename T::value_type, class = void>
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struct has_memory_alignment : std::false_type {};
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template <class T, class U>
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struct has_memory_alignment<T, U, std::void_t<decltype(ex::memory_alignment<T, U>::value)>> : std::true_type {};
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struct CheckMemoryAlignmentTraits {
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template <class T>
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void operator()() {
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static_assert(has_memory_alignment<ex::native_simd<T>>::value);
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static_assert(has_memory_alignment<ex::fixed_size_simd_mask<T, 4>>::value);
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static_assert(has_memory_alignment<ex::native_simd<T>, T>::value);
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static_assert(has_memory_alignment<ex::fixed_size_simd_mask<T, 4>, bool>::value);
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static_assert(!has_memory_alignment<T, T>::value);
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static_assert(!has_memory_alignment<T, bool>::value);
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static_assert(!has_memory_alignment<ex::native_simd<T>, bool>::value);
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static_assert(!has_memory_alignment<ex::fixed_size_simd_mask<T, 4>, T>::value);
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}
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};
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int main(int, char**) {
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types::for_each(arithmetic_no_bool_types(), CheckMemAlignmentFixedDeduce());
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types::for_each(arithmetic_no_bool_types(), CheckMemAlignmentScalarNativeCompatible());
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test_all_simd_abi<CheckMemoryAlignmentMask>();
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test_all_simd_abi<CheckMemoryAlignmentLongDouble>();
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types::for_each(arithmetic_no_bool_types(), CheckMemoryAlignmentTraits());
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return 0;
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}
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