2014-03-28 17:52:51 +00:00
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/*!
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* \file magnitude_squared_test.cc
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* \brief This file implements tests for the computation of magnitude squared
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* in long arrays.
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* \author Carles Fernandez-Prades, 2014. cfernandez(at)cttc.es
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*
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*
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* -------------------------------------------------------------------------
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*
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2018-05-13 20:49:11 +00:00
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* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
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2014-03-28 17:52:51 +00:00
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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2015-01-08 18:49:59 +00:00
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* (at your option) any later version.
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2014-03-28 17:52:51 +00:00
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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2018-05-13 20:49:11 +00:00
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* along with GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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2014-03-28 17:52:51 +00:00
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*
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* -------------------------------------------------------------------------
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*/
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#include <armadillo>
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#include <volk/volk.h>
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2016-08-18 12:17:02 +00:00
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#include <volk_gnsssdr/volk_gnsssdr.h>
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2018-12-09 21:00:09 +00:00
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#include <algorithm>
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#include <chrono>
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#include <complex>
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2014-03-28 17:52:51 +00:00
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DEFINE_int32(size_magnitude_test, 100000, "Size of the arrays used for magnitude testing");
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2017-06-25 20:53:11 +00:00
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TEST(MagnitudeSquaredTest, StandardCComplexImplementation)
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2014-03-28 17:52:51 +00:00
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{
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2019-02-11 14:33:24 +00:00
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auto* input = new std::complex<float>[FLAGS_size_magnitude_test];
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auto* output = new float[FLAGS_size_magnitude_test];
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2014-03-28 17:52:51 +00:00
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unsigned int number = 0;
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2017-08-11 03:18:38 +00:00
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std::chrono::time_point<std::chrono::system_clock> start, end;
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start = std::chrono::system_clock::now();
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2014-03-28 17:52:51 +00:00
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2018-03-03 01:03:39 +00:00
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for (number = 0; number < static_cast<unsigned int>(FLAGS_size_magnitude_test); number++)
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2014-03-28 17:52:51 +00:00
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{
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2015-02-10 18:30:15 +00:00
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output[number] = (input[number].real() * input[number].real()) + (input[number].imag() * input[number].imag());
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2014-03-28 17:52:51 +00:00
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}
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2017-08-11 03:18:38 +00:00
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end = std::chrono::system_clock::now();
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std::chrono::duration<double> elapsed_seconds = end - start;
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2014-03-29 19:11:32 +00:00
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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2017-08-11 03:18:38 +00:00
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<< "-length vector in standard C computed in " << elapsed_seconds.count() * 1e6
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2014-03-28 17:52:51 +00:00
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<< " microseconds" << std::endl;
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2015-05-13 14:40:46 +00:00
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delete[] input;
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delete[] output;
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2017-08-11 03:18:38 +00:00
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ASSERT_LE(0, elapsed_seconds.count() * 1e6);
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2014-03-28 17:52:51 +00:00
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}
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2017-08-11 03:18:38 +00:00
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2017-06-25 20:53:11 +00:00
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TEST(MagnitudeSquaredTest, C11ComplexImplementation)
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2014-03-29 19:11:32 +00:00
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{
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const std::vector<std::complex<float>> input(FLAGS_size_magnitude_test);
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2015-02-10 18:30:15 +00:00
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std::vector<float> output(FLAGS_size_magnitude_test);
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2014-03-29 21:53:56 +00:00
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int pos = 0;
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2017-08-11 03:18:38 +00:00
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std::chrono::time_point<std::chrono::system_clock> start, end;
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start = std::chrono::system_clock::now();
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2014-03-29 21:53:56 +00:00
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2018-03-03 01:03:39 +00:00
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for (const auto& item : input)
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2014-03-29 19:11:32 +00:00
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{
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2014-03-29 21:53:56 +00:00
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output[pos++] = std::norm(item);
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2014-03-29 19:11:32 +00:00
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}
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2014-03-29 21:53:56 +00:00
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2017-08-11 03:18:38 +00:00
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end = std::chrono::system_clock::now();
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std::chrono::duration<double> elapsed_seconds = end - start;
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2014-03-29 19:11:32 +00:00
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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2017-08-11 03:18:38 +00:00
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<< " complex<float> vector (C++11-style) finished in " << elapsed_seconds.count() * 1e6
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2014-03-29 19:11:32 +00:00
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<< " microseconds" << std::endl;
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2017-08-11 03:18:38 +00:00
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ASSERT_LE(0, elapsed_seconds.count() * 1e6);
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2014-03-29 19:11:32 +00:00
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2018-03-03 01:03:39 +00:00
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std::complex<float> expected(0, 0);
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std::complex<float> result(0, 0);
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for (const auto& item : output)
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2014-03-29 19:11:32 +00:00
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{
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result += item;
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}
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ASSERT_EQ(expected, result);
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}
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2014-03-28 17:52:51 +00:00
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2017-06-25 20:53:11 +00:00
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TEST(MagnitudeSquaredTest, ArmadilloComplexImplementation)
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2014-03-28 17:52:51 +00:00
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{
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arma::cx_fvec input(FLAGS_size_magnitude_test, arma::fill::zeros);
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arma::fvec output(FLAGS_size_magnitude_test);
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2017-08-11 03:18:38 +00:00
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std::chrono::time_point<std::chrono::system_clock> start, end;
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start = std::chrono::system_clock::now();
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2014-03-28 17:52:51 +00:00
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output = arma::abs(arma::square(input));
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2017-08-11 03:18:38 +00:00
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end = std::chrono::system_clock::now();
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std::chrono::duration<double> elapsed_seconds = end - start;
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2018-03-03 01:03:39 +00:00
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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2017-08-11 03:18:38 +00:00
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<< "-length vector using Armadillo computed in " << elapsed_seconds.count() * 1e6
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2014-03-28 17:52:51 +00:00
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<< " microseconds" << std::endl;
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2017-08-11 03:18:38 +00:00
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ASSERT_LE(0, elapsed_seconds.count() * 1e6);
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2014-03-28 17:52:51 +00:00
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}
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2017-06-25 20:53:11 +00:00
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TEST(MagnitudeSquaredTest, VolkComplexImplementation)
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2014-03-28 17:52:51 +00:00
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{
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2019-02-11 14:33:24 +00:00
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auto* input = static_cast<std::complex<float>*>(volk_gnsssdr_malloc(FLAGS_size_magnitude_test * sizeof(std::complex<float>), volk_gnsssdr_get_alignment()));
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2018-02-25 12:27:27 +00:00
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std::fill_n(input, FLAGS_size_magnitude_test, std::complex<float>(0.0, 0.0));
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2019-02-11 14:33:24 +00:00
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auto* output = static_cast<float*>(volk_gnsssdr_malloc(FLAGS_size_magnitude_test * sizeof(float), volk_gnsssdr_get_alignment()));
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2017-08-11 03:18:38 +00:00
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std::chrono::time_point<std::chrono::system_clock> start, end;
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start = std::chrono::system_clock::now();
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2014-03-28 17:52:51 +00:00
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2014-09-12 11:34:43 +00:00
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volk_32fc_magnitude_squared_32f(output, input, static_cast<unsigned int>(FLAGS_size_magnitude_test));
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2014-03-28 17:52:51 +00:00
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2017-08-11 03:18:38 +00:00
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end = std::chrono::system_clock::now();
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std::chrono::duration<double> elapsed_seconds = end - start;
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2018-03-03 01:03:39 +00:00
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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2017-08-11 03:18:38 +00:00
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<< "-length vector using VOLK computed in " << elapsed_seconds.count() * 1e6
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2014-03-28 17:52:51 +00:00
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<< " microseconds" << std::endl;
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2016-08-18 12:17:02 +00:00
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volk_gnsssdr_free(input);
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volk_gnsssdr_free(output);
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2017-08-11 03:18:38 +00:00
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ASSERT_LE(0, elapsed_seconds.count() * 1e6);
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2014-03-28 17:52:51 +00:00
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}
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2014-03-29 19:11:32 +00:00
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// volk_32f_accumulator_s32f(&d_input_power, d_magnitude, d_fft_size);
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