libcxx/test/std/experimental/simd/simd.traits/simd_size.pass.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-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
  20 namespace ex = std::experimental::parallelism_v2;
  21
  22 struct 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
  43 struct 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
  58 template <class T, class Abi = ex::simd_abi::compatible<T>, class = void>
  59 struct has_simd_size : std::false_type {};
  60
  61 template <class T, class Abi>
  62 struct has_simd_size<T, Abi, std::void_t<decltype(ex::simd_size<T, Abi>::value)>> : std::true_type {};
  63
  64 struct 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
  87 int 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 }