libcxx/test/std/experimental/simd/test_utils.h

   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 #ifndef LIBCXX_TEST_STD_EXPERIMENTAL_SIMD_TEST_UTILS_H
  10 #define LIBCXX_TEST_STD_EXPERIMENTAL_SIMD_TEST_UTILS_H
  11
  12 #include <array>
  13 #include <cassert>
  14 #include <cstddef>
  15 #include <experimental/simd>
  16 #include <type_traits>
  17 #include <utility>
  18
  19 #include "type_algorithms.h"
  20
  21 namespace ex = std::experimental::parallelism_v2;
  22
  23 constexpr std::size_t max_simd_size = 32;
  24
  25 template <template <class T, std::size_t N> class F>
  26 struct TestAllSimdAbiFunctor {
  27   template <class T, std::size_t N>
  28   using sized_abis = types::type_list<ex::simd_abi::fixed_size<N>, ex::simd_abi::deduce_t<T, N>>;
  29
  30   template <class T, std::size_t... Ns>
  31   void instantiate_with_n(std::index_sequence<Ns...>) {
  32     (types::for_each(sized_abis<T, Ns>{}, F<T, Ns>{}), ...);
  33   }
  34
  35   template <class T>
  36   void operator()() {
  37     using abis = types::type_list<ex::simd_abi::scalar, ex::simd_abi::native<T>, ex::simd_abi::compatible<T>>;
  38     types::for_each(abis{}, F<T, 1>());
  39
  40     instantiate_with_n<T>(
  41         std::index_sequence<1, 2, 3, 4, 8, 16, max_simd_size - 2, max_simd_size - 1, max_simd_size>{});
  42   }
  43 };
  44
  45 // TODO: Support long double (12 bytes) for 32-bits x86
  46 #ifdef __i386__
  47 using arithmetic_no_bool_types = types::concatenate_t<types::integer_types, types::type_list<float, double>>;
  48 #else
  49 using arithmetic_no_bool_types = types::concatenate_t<types::integer_types, types::floating_point_types>;
  50 #endif
  51
  52 // For interfaces with vectorizable type template parameters, we only use some common or boundary types
  53 // as template parameters for testing to ensure that the compilation time of a single test does not exceed.
  54 using simd_test_integer_types =
  55     types::type_list<char,
  56                      unsigned,
  57                      int
  58 #ifndef TEST_HAS_NO_INT128
  59                      ,
  60                      __int128_t
  61 #endif
  62                      >;
  63 using simd_test_types = types::concatenate_t<simd_test_integer_types, types::type_list<float, double>>;
  64
  65 template <template <class T, std::size_t N> class Func>
  66 void test_all_simd_abi() {
  67   types::for_each(arithmetic_no_bool_types(), TestAllSimdAbiFunctor<Func>());
  68 }
  69
  70 constexpr size_t bit_ceil(size_t val) {
  71   size_t pow = 1;
  72   while (pow < val)
  73     pow <<= 1;
  74   return pow;
  75 }
  76
  77 template <class From, class To, class = void>
  78 inline constexpr bool is_non_narrowing_convertible_v = false;
  79
  80 template <class From, class To>
  81 inline constexpr bool is_non_narrowing_convertible_v<From, To, std::void_t<decltype(To{std::declval<From>()})>> = true;
  82
  83 template <std::size_t ArraySize, class SimdAbi, class T, class U = T>
  84 void assert_simd_values_equal(const ex::simd<T, SimdAbi>& origin_simd, const std::array<U, ArraySize>& expected_value) {
  85   for (std::size_t i = 0; i < origin_simd.size(); ++i)
  86     assert(origin_simd[i] == static_cast<T>(expected_value[i]));
  87 }
  88
  89 template <std::size_t ArraySize, class T, class SimdAbi>
  90 void assert_simd_mask_values_equal(const ex::simd_mask<T, SimdAbi>& origin_mask,
  91                                    const std::array<bool, ArraySize>& expected_value) {
  92   for (std::size_t i = 0; i < origin_mask.size(); ++i)
  93     assert(origin_mask[i] == expected_value[i]);
  94 }
  95
  96 template <class SimdAbi, class T, class U = T>
  97 void assert_simd_values_equal(const ex::simd<T, SimdAbi>& origin_simd, U* expected_value) {
  98   for (size_t i = 0; i < origin_simd.size(); ++i)
  99     assert(origin_simd[i] == static_cast<T>(expected_value[i]));
 100 }
 101
 102 template <class SimdAbi, class T>
 103 void assert_simd_mask_values_equal(const ex::simd_mask<T, SimdAbi>& origin_mask, bool* expected_value) {
 104   for (size_t i = 0; i < origin_mask.size(); ++i)
 105     assert(origin_mask[i] == expected_value[i]);
 106 }
 107
 108 #endif // LIBCXX_TEST_STD_EXPERIMENTAL_SIMD_TEST_UTILS_H