mirror of
https://github.com/gnss-sdr/gnss-sdr
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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/*!
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* \file benchmark_preamble.cc
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* \brief Benchmark for preamble conversion implementations
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* \author Carles Fernandez-Prades, 2020. cfernandez(at)cttc.es
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*
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#include "GPS_L1_CA.h"
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#include <benchmark/benchmark.h>
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#include <algorithm>
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#include <array>
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void bm_forloop(benchmark::State& state)
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{
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std::array<int32_t, GPS_CA_PREAMBLE_LENGTH_SYMBOLS> d_preamble_samples{};
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volatile int32_t res; // Prevent the compiler from optimizing the loop away
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while (state.KeepRunning())
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{
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int32_t n = 0;
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for (int32_t i = 0; i < GPS_CA_PREAMBLE_LENGTH_SYMBOLS; i++)
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{
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if (GPS_CA_PREAMBLE_SYMBOLS_STR[i] == '1')
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{
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d_preamble_samples[n] = 1;
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n++;
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}
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else
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{
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d_preamble_samples[n] = -1;
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n++;
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}
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}
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res = d_preamble_samples[GPS_CA_PREAMBLE_LENGTH_SYMBOLS - 1];
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}
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if (res > 1)
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{
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// Avoid unused-but-set-variable warning
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}
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}
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void bm_generate(benchmark::State& state)
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{
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std::array<int32_t, GPS_CA_PREAMBLE_LENGTH_SYMBOLS> d_preamble_samples{};
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volatile int32_t res; // Prevent the compiler from optimizing the loop away
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while (state.KeepRunning())
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{
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std::generate(d_preamble_samples.begin(), d_preamble_samples.end(), [n = 0]() mutable { return (GPS_CA_PREAMBLE_SYMBOLS_STR[n++] == '1' ? 1 : -1); });
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res = d_preamble_samples[GPS_CA_PREAMBLE_LENGTH_SYMBOLS - 1];
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}
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if (res > 1)
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{
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// Avoid unused-but-set-variable warning
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}
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}
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BENCHMARK(bm_forloop);
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BENCHMARK(bm_generate);
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BENCHMARK_MAIN();
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