/*
 * Copyright (c) 2007 - 2021 Joseph Gaeddert
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <sys/resource.h>
#include "liquid.h"

// Helper function to keep code base small
void sumsqf_bench(struct rusage *     _start,
                  struct rusage *     _finish,
                  unsigned long int * _num_iterations,
                  unsigned int        _n)
{
    // normalize number of iterations
    *_num_iterations = *_num_iterations * 20 / _n;
    if (*_num_iterations < 1) *_num_iterations = 1;

    float x[_n];
    float y = 0.0f;
    unsigned int long i;
    for (i=0; i<_n; i++)
        x[i] = 1.0f;

    // start trials
    getrusage(RUSAGE_SELF, _start);
    for (i=0; i<(*_num_iterations); i++) {
        y += liquid_sumsqf(x, _n);
        y -= liquid_sumsqf(x, _n);
        y += liquid_sumsqf(x, _n);
        y -= liquid_sumsqf(x, _n);
        
        // change input
        x[i%_n] = y;
    }
    getrusage(RUSAGE_SELF, _finish);
    *_num_iterations *= 4;
}

#define SUMSQF_BENCHMARK_API(N)         \
(   struct rusage *_start,              \
    struct rusage *_finish,             \
    unsigned long int *_num_iterations) \
{ sumsqf_bench(_start, _finish, _num_iterations, N); }

void benchmark_sumsqf_4         SUMSQF_BENCHMARK_API(4)
void benchmark_sumsqf_16        SUMSQF_BENCHMARK_API(16)
void benchmark_sumsqf_64        SUMSQF_BENCHMARK_API(64)
void benchmark_sumsqf_256       SUMSQF_BENCHMARK_API(256)

