mirror of https://github.com/gnss-sdr/gnss-sdr
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*!
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* \file complex_arithmetic_libc.cc
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* \brief This file implements a unit test for multiplication of long arrays.
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* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
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* Carles Fernandez-Prades, 2012. 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) 2010-2012 (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 <gtest/gtest.h>
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#include <gflags/gflags.h>
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#include <complex>
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#include <sys/time.h>
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#include <iostream>
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#include <glog/log_severity.h>
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#include <glog/logging.h>
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using google::LogMessage;
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DEFINE_int32(size_multiply_test, 100000, "Size of the arrays used for calculations");
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TEST(Multiply_Test, StandardCImplementation)
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{
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//LOG_AT_LEVEL(INFO) << "Using standard C++ library implementation to perform complex arithmetic";
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std::complex<float>* input = new std::complex<float>[FLAGS_size_multiply_test];
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std::complex<float>* output = new std::complex<float>[FLAGS_size_multiply_test];
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memset(input, 0, sizeof(std::complex<float>) * FLAGS_size_multiply_test);
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//LOG_AT_LEVEL(INFO) << "Allocated two vectors containing " << FLAGS_size << " complex numbers";
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//LOG_AT_LEVEL(INFO) << "Begin multiplications";
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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(int i=0; i<FLAGS_size_multiply_test; i++)
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{
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output[i] = input[i] * input[i];
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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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// LOG_AT_LEVEL(INFO) << "Finished in " << (end - begin) << " microseconds";
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std::cout << "Multiplication of "<< FLAGS_size_multiply_test << " complex<float> finished in " << (end - begin) << " microseconds" << std::endl;
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}
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