/* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
 *
 * This file is part of GNSS-SDR.
 *
 * GNSS-SDR is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GNSS-SDR is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
 */

#include <volk_gnsssdr/volk_gnsssdr.h>
#include <qa_32fc_power_spectral_density_32f_aligned16.h>
#include <volk_gnsssdr/volk_gnsssdr_32fc_power_spectral_density_32f_aligned16.h>
#include <cstdlib>
#include <ctime>

//test for sse3

#ifndef LV_HAVE_SSE3

void qa_32fc_power_spectral_density_32f_aligned16::t1()
{
    printf("sse3 not available... no test performed\n");
}

#else

void qa_32fc_power_spectral_density_32f_aligned16::t1()
{
    volk_gnsssdr_environment_init();
    clock_t start, end;
    double total;
    const int vlen = 3201;
    const int ITERS = 10000;
    __VOLK_ATTR_ALIGNED(16) std::complex<float> input0[vlen];

    __VOLK_ATTR_ALIGNED(16) float output_generic[vlen];
    __VOLK_ATTR_ALIGNED(16) float output_sse3[vlen];

    const float scalar = vlen;
    const float rbw = 1.7;

    float* inputLoad = (float*)input0;
    for(int i = 0; i < 2*vlen; ++i)
        {
            inputLoad[i] = (((float) (rand() - (RAND_MAX/2))) / static_cast<float>((RAND_MAX/2)));
        }
    printf("32fc_power_spectral_density_32f_aligned\n");

    start = clock();
    for(int count = 0; count < ITERS; ++count)
        {
            volk_gnsssdr_32fc_power_spectral_density_32f_aligned16_manual(output_generic, input0, scalar, rbw, vlen, "generic");
        }
    end = clock();
    total = (double)(end-start)/(double)CLOCKS_PER_SEC;
    printf("generic_time: %f\n", total);
    start = clock();
    for(int count = 0; count < ITERS; ++count)
        {
            volk_gnsssdr_32fc_power_spectral_density_32f_aligned16_manual(output_sse3, input0, scalar, rbw, vlen, "sse3");
        }
    end = clock();
    total = (double)(end-start)/(double)CLOCKS_PER_SEC;
    printf("sse3_time: %f\n", total);

    //for(int i = 0; i < 1; ++i) {
    //printf("inputs: %d, %d\n", input0[i*2], input0[i*2 + 1]);
    //printf("generic... %d, ssse3... %d\n", output0[i], output1[i]);
    //}

    for(int i = 0; i < vlen; ++i)
        {
            //printf("%d...%d\n", output0[i], output01[i]);
            CPPUNIT_ASSERT_DOUBLES_EQUAL(output_generic[i], output_sse3[i], fabs(output_generic[i]*1e-4));
        }
}

#endif
