// SPDX-License-Identifier: BSD-2-Clause

/* Copyright (C) 2014 - 2020 Intel Corporation. */

#include <memkind.h>

#include <stdlib.h>

#include <stdio.h>

#include <errno.h>

int main(int argc, char **argv)

{

    const size_t stream_len = 1024 * 1024;

    const size_t filter_len = 1024;

    const size_t num_filter = stream_len / filter_len;

    size_t i, j;

    double *stream = NULL;

    double *filter = NULL;

    double *result = NULL;

    srandom(0);

    stream = (double *)memkind_malloc(MEMKIND_DEFAULT, stream_len * sizeof(double));

    if (stream == NULL) {

        perror("<memkind>");

        fprintf(stderr, "Unable to allocate stream\n");

        return errno ? -errno : 1;

    }

    filter = (double *)memkind_malloc(MEMKIND_HBW, filter_len * sizeof(double));

    if (filter == NULL) {

        perror("<memkind>");

        fprintf(stderr, "Unable to allocate filter\n");

        return errno ? -errno : 1;

    }

    result = (double *)memkind_calloc(MEMKIND_HBW, filter_len, sizeof(double));

    if (result == NULL) {

        perror("<memkind>");

        fprintf(stderr, "Unable to allocate result\n");

        return errno ? -errno : 1;

    }

    for (i = 0; i < stream_len; i++) {

        stream[i] = (double)(random())/(double)(RAND_MAX);

    }

    for (i = 0; i < filter_len; i++) {

        filter[i] = (double)(i)/(double)(filter_len);

    }

    for (i = 0; i < num_filter; i++) {

        for (j = 0; j < filter_len; j++) {

            result[j] += stream[i * filter_len + j] * filter[j];

        }

    }

    for (i = 0; i < filter_len; i++) {

        fprintf(stdout, "%.6e\n", result[i]);

    }

    memkind_free(MEMKIND_HBW, result);

    memkind_free(MEMKIND_HBW, filter);

    memkind_free(MEMKIND_DEFAULT, stream);

    return 0;

}