120 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.traits]14// template <class T, class U = typename T::value_type> struct memory_alignment;15// template <class T, class U = typename T::value_type>16// inline constexpr std::size_t memory_alignment_v = memory_alignment<T, U>::value;17 18#include "../test_utils.h"19 20namespace ex = std::experimental::parallelism_v2;21 22template <class T, std::size_t N>23struct CheckMemoryAlignmentMask {24 template <class SimdAbi>25 void operator()() {26 LIBCPP_STATIC_ASSERT(27 ex::memory_alignment<ex::simd_mask<T, SimdAbi>>::value == bit_ceil(sizeof(bool) * ex::simd_size_v<T, SimdAbi>));28 LIBCPP_STATIC_ASSERT(29 ex::memory_alignment_v<ex::simd_mask<T, SimdAbi>> == bit_ceil(sizeof(bool) * ex::simd_size_v<T, SimdAbi>));30 }31};32 33template <class T, std::size_t N>34struct CheckMemoryAlignmentLongDouble {35 template <class SimdAbi>36 void operator()() {37 if constexpr (std::is_same_v<T, long double>) {38 // on i686-w64-mingw32-clang++, the size of long double is 12 bytes. Disambiguation is needed.39 static_assert(40 ex::memory_alignment<ex::simd<T, SimdAbi>>::value == bit_ceil(sizeof(T) * ex::simd_size_v<T, SimdAbi>));41 static_assert(ex::memory_alignment_v<ex::simd<T, SimdAbi>> == bit_ceil(sizeof(T) * ex::simd_size_v<T, SimdAbi>));42 }43 }44};45 46struct CheckMemAlignmentFixedDeduce {47 template <class T, std::size_t N>48 void check() {49 if constexpr (!std::is_same_v<T, long double>) {50 static_assert(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::fixed_size<N>>> == sizeof(T) * bit_ceil(N),51 "Memory Alignment mismatch with abi fixed_size");52 static_assert(ex::memory_alignment<ex::simd<T, ex::simd_abi::fixed_size<N>>>::value == sizeof(T) * bit_ceil(N),53 "Memory Alignment mismatch with abi fixed_size");54 55 static_assert(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::deduce_t<T, N>>> == sizeof(T) * bit_ceil(N),56 "Memory Alignment mismatch with abi deduce");57 static_assert(ex::memory_alignment<ex::simd<T, ex::simd_abi::deduce_t<T, N>>>::value == sizeof(T) * bit_ceil(N),58 "Memory Alignment mismatch with abi deduce");59 }60 }61 62 template <class T, std::size_t... N>63 void performChecks(std::index_sequence<N...>) {64 (check<T, N + 1>(), ...);65 }66 67 template <class T>68 void operator()() {69 performChecks<T>(std::make_index_sequence<max_simd_size>{});70 }71};72 73struct CheckMemAlignmentScalarNativeCompatible {74 template <class T>75 void operator()() {76 if constexpr (!std::is_same_v<T, long double>) {77 static_assert(ex::memory_alignment<ex::simd<T, ex::simd_abi::scalar>>::value == sizeof(T));78 static_assert(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::scalar>> == sizeof(T));79 80 LIBCPP_STATIC_ASSERT(ex::memory_alignment<ex::simd<T, ex::simd_abi::compatible<T>>>::value == 16);81 LIBCPP_STATIC_ASSERT(ex::memory_alignment_v<ex::simd<T, ex::simd_abi::compatible<T>>> == 16);82 83 LIBCPP_STATIC_ASSERT(84 ex::memory_alignment<ex::simd<T, ex::simd_abi::native<T>>>::value == _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES);85 LIBCPP_STATIC_ASSERT(86 ex::memory_alignment_v<ex::simd<T, ex::simd_abi::native<T>>> == _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES);87 }88 }89};90 91template <class T, class U = typename T::value_type, class = void>92struct has_memory_alignment : std::false_type {};93 94template <class T, class U>95struct has_memory_alignment<T, U, std::void_t<decltype(ex::memory_alignment<T, U>::value)>> : std::true_type {};96 97struct CheckMemoryAlignmentTraits {98 template <class T>99 void operator()() {100 static_assert(has_memory_alignment<ex::native_simd<T>>::value);101 static_assert(has_memory_alignment<ex::fixed_size_simd_mask<T, 4>>::value);102 static_assert(has_memory_alignment<ex::native_simd<T>, T>::value);103 static_assert(has_memory_alignment<ex::fixed_size_simd_mask<T, 4>, bool>::value);104 105 static_assert(!has_memory_alignment<T, T>::value);106 static_assert(!has_memory_alignment<T, bool>::value);107 static_assert(!has_memory_alignment<ex::native_simd<T>, bool>::value);108 static_assert(!has_memory_alignment<ex::fixed_size_simd_mask<T, 4>, T>::value);109 }110};111 112int main(int, char**) {113 types::for_each(arithmetic_no_bool_types(), CheckMemAlignmentFixedDeduce());114 types::for_each(arithmetic_no_bool_types(), CheckMemAlignmentScalarNativeCompatible());115 test_all_simd_abi<CheckMemoryAlignmentMask>();116 test_all_simd_abi<CheckMemoryAlignmentLongDouble>();117 types::for_each(arithmetic_no_bool_types(), CheckMemoryAlignmentTraits());118 return 0;119}120