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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* Copyright (C) 2010-2014 (see AUTHORS file for a list of contributors)
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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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* at your option) any later version.
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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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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#include <complex>
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#include <ctime>
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#include <armadillo>
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#include <volk/volk.h>
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DEFINE_int32(size_magnitude_test, 100000, "Size of the arrays used for magnitude testing");
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TEST(MagnitudeSquared_Test, StandardCComplexImplementation)
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{
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std::complex<float>* input = new std::complex<float>[FLAGS_size_magnitude_test];
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memset(input, 0, sizeof(std::complex<float>) * FLAGS_size_magnitude_test);
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const float* inputPtr = (float*)input;
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float* output = new float[FLAGS_size_magnitude_test];
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unsigned int number = 0;
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struct timeval tv;
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gettimeofday(&tv, NULL);
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long long int begin = tv.tv_sec * 1000000 + tv.tv_usec;
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for(number = 0; number < (unsigned int)FLAGS_size_magnitude_test; number++)
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{
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const float real = *inputPtr++;
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const float imag = *inputPtr++;
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*output++ = (real*real) + (imag*imag);
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}
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gettimeofday(&tv, NULL);
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long long int end = tv.tv_sec * 1000000 + tv.tv_usec;
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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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<< "-length vector in standard C computed in " << (end - begin)
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2014-03-28 17:52:51 +00:00
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<< " microseconds" << std::endl;
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ASSERT_LE(0, end - begin);
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2014-03-29 21:53:56 +00:00
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delete [] input;
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delete [] output;
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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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TEST(MagnitudeSquared_Test, C11ComplexImplementation)
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{
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const std::vector<std::complex<float>> input(FLAGS_size_magnitude_test);
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std::vector<std::complex<float>> output(FLAGS_size_magnitude_test);
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struct timeval tv;
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2014-03-29 21:53:56 +00:00
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int pos = 0;
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2014-03-29 19:11:32 +00:00
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gettimeofday(&tv, NULL);
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long long int begin = tv.tv_sec * 1000000 + tv.tv_usec;
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2014-03-29 21:53:56 +00:00
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2014-03-29 19:11:32 +00:00
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for (const auto &item : input)
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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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2014-03-29 19:11:32 +00:00
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gettimeofday(&tv, NULL);
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long long int end = tv.tv_sec * 1000000 + tv.tv_usec;
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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<< " complex<float> vector (C++11-style) finished in " << (end - begin)
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<< " microseconds" << std::endl;
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ASSERT_LE(0, end - begin);
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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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{
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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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TEST(MagnitudeSquared_Test, ArmadilloComplexImplementation)
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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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struct timeval tv;
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gettimeofday(&tv, NULL);
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long long int begin = tv.tv_sec * 1000000 + tv.tv_usec;
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output = arma::abs(arma::square(input));
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gettimeofday(&tv, NULL);
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long long int end = tv.tv_sec * 1000000 + tv.tv_usec;
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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<< "-length vector using Armadillo computed in " << (end - begin)
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<< " microseconds" << std::endl;
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ASSERT_LE(0, end - begin);
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}
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TEST(MagnitudeSquared_Test, VolkComplexImplementation)
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{
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std::complex<float>* input = new std::complex<float>[FLAGS_size_magnitude_test];
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memset(input, 0, sizeof(std::complex<float>) * FLAGS_size_magnitude_test);
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float* output = new float[FLAGS_size_magnitude_test];
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struct timeval tv;
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gettimeofday(&tv, NULL);
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long long int begin = tv.tv_sec * 1000000 + tv.tv_usec;
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volk_32fc_magnitude_squared_32f(output, input, (unsigned int)FLAGS_size_magnitude_test);
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gettimeofday(&tv, NULL);
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long long int end = tv.tv_sec * 1000000 + tv.tv_usec;
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std::cout << "The squared magnitude of a " << FLAGS_size_magnitude_test
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<< "-length vector using VOLK computed in " << (end - begin)
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<< " microseconds" << std::endl;
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ASSERT_LE(0, end - begin);
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2014-03-29 21:53:56 +00:00
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delete [] input;
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delete [] output;
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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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2014-03-28 17:52:51 +00:00
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