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// Copyright (C) 2003, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

#include <complex>

#include <testsuite_performance.h>

// based on libstdc++/5730, use --fast-math

int main()

{

  using namespace std;

  using namespace __gnu_test;

  time_counter time;

  resource_counter resource;

  const int iterations = 2000;

  typedef complex<double> complex_type;

  complex_type u[2048];

  for (int i = 0; i < 2048; ++i)

    u[i] = 1.0;

  start_counters(time, resource);

  for (int i = 0; i < iterations; ++i)

    {

      complex_type * p = u;

      for (int j = 0; j < 2048; ++j)

        {

          double u2 = norm(*p);

          double t = u2 * 0.1;

          *p *= complex_type(cos(t), sin(t));

          ++p;

        }

    }

  stop_counters(time, resource);

  report_performance(__FILE__, "norm", time, resource);

  clear_counters(time, resource);

  start_counters(time, resource);

  for (int i = 0; i < iterations; ++i)

    {

      complex_type * p = u;

      for (int j = 0; j < 2048; ++j)

        {

          // Shouldn't be slower than the above.

          double ur = real(*p);

          double ui = imag(*p);

          double u2 = ur * ur + ui * ui;

          double t = u2 * 0.1;

          *p *= complex_type(cos(t), sin(t));

          ++p;

        }

    }

  stop_counters(time, resource);

  report_performance(__FILE__, "", time, resource);

  return 0;

}