libstdc++-v3/testsuite/experimental/simd/tests/abs.cc

   1 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8 //
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // expensive: * [1-9] * *
  19 #include "bits/main.h"
  20 #include <cmath>    // abs & sqrt
  21 #include <cstdlib>  // integer abs
  22
  23 template <typename V>
  24   void
  25   test()
  26   {
  27     if constexpr (std::is_signed_v<typename V::value_type>)
  28       {
  29         using std::abs;
  30         using T = typename V::value_type;
  31         test_values<V>({std::__finite_max_v<T>, std::__norm_min_v<T>,
  32                         -std::__norm_min_v<T>, std::__finite_min_v<T>,
  33                         std::__finite_min_v<T> / 2, T(), -T(), T(-1), T(-2)},
  34                        {1000}, [](V input) {
  35                          const V expected(
  36                            [&](auto i) { return T(std::abs(T(input[i]))); });
  37                          COMPARE(abs(input), expected) << "input: " << input;
  38                        });
  39       }
  40   }