libstdc++-v3/testsuite/experimental/simd/tests/remqo.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 // only: float|double|ldouble * * *
  19 // expensive: * [1-9] * *
  20 #include "bits/main.h"
  21
  22 template <typename V>
  23   void
  24   test()
  25   {
  26     vir::test::setFuzzyness<float>(0);
  27     vir::test::setFuzzyness<double>(0);
  28
  29     using T = typename V::value_type;
  30     test_values_2arg<V>(
  31       {
  32 #ifdef __STDC_IEC_559__
  33         std::__quiet_NaN_v<T>, std::__infinity_v<T>, -std::__infinity_v<T>,
  34         std::__denorm_min_v<T>, std::__norm_min_v<T> / 3, -0.,
  35 #endif
  36         +0., std::__norm_min_v<T>, std::__finite_max_v<T>},
  37       {10000}, [](V a, V b) {
  38
  39 #ifndef __STDC_IEC_559__
  40         // without __STDC_IEC_559__, remquo(a, 0) is unspecified
  41         where(b == 0, b) = 1;
  42 #endif
  43         using IV = std::experimental::fixed_size_simd<int, V::size()>;
  44         IV quo = {};
  45         const V totest = remquo(a, b, &quo);
  46         auto&& expected
  47           = [&](const auto& v, const auto& w) -> std::pair<const V, const IV> {
  48             std::pair<V, IV> tmp = {};
  49             using std::remquo;
  50             for (std::size_t i = 0; i < V::size(); ++i)
  51               {
  52                 int tmp2;
  53                 tmp.first[i] = remquo(v[i], w[i], &tmp2);
  54                 tmp.second[i] = tmp2;
  55               }
  56             return tmp;
  57           };
  58         const auto expect1 = expected(a, b);
  59         COMPARE(isnan(totest), isnan(expect1.first))
  60           << "remquo(" << a << ", " << b << ", quo) = " << totest
  61           << " != " << expect1.first;
  62         const V clean_a = iif(isnan(totest), 0, a);
  63         const V clean_b = iif(isnan(totest), 1, b);
  64         const auto expect2 = expected(clean_a, clean_b);
  65         COMPARE(remquo(clean_a, clean_b, &quo), expect2.first)
  66           << "\nclean_a/b = " << clean_a << ", " << clean_b;
  67         COMPARE(quo, expect2.second);
  68       });
  69   }