/* Measure memcpy functions.

   Copyright (C) 2013-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef MEMCPY_RESULT

# define MEMCPY_RESULT(dst, len) dst

# define MIN_PAGE_SIZE 131072

# define TEST_MAIN

# define TEST_NAME "memcpy"

# include "bench-string.h"

char *simple_memcpy (char *, const char *, size_t);

char *builtin_memcpy (char *, const char *, size_t);

IMPL (simple_memcpy, 0)

IMPL (builtin_memcpy, 0)

IMPL (memcpy, 1)

char *

simple_memcpy (char *dst, const char *src, size_t n)

{

  char *ret = dst;

  while (n--)

    *dst++ = *src++;

  return ret;

}

char *

builtin_memcpy (char *dst, const char *src, size_t n)

{

  return __builtin_memcpy (dst, src, n);

}

#endif

# include "json-lib.h"

typedef char *(*proto_t) (char *, const char *, size_t);

static void

do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src,

	     size_t len)

{

  size_t i, iters = INNER_LOOP_ITERS;

  timing_t start, stop, cur;

  TIMING_NOW (start);

  for (i = 0; i < iters; ++i)

    {

      CALL (impl, dst, src, len);

    }

  TIMING_NOW (stop);

  TIMING_DIFF (cur, start, stop);

  json_element_double (json_ctx, (double) cur / (double) iters);

}

static void

do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len)

{

  size_t i, j;

  char *s1, *s2;

  align1 &= 63;

  if (align1 + len >= page_size)

    return;

  align2 &= 63;

  if (align2 + len >= page_size)

    return;

  s1 = (char *) (buf1 + align1);

  s2 = (char *) (buf2 + align2);

  for (i = 0, j = 1; i < len; i++, j += 23)

    s1[i] = j;

  json_element_object_begin (json_ctx);

  json_attr_uint (json_ctx, "length", (double) len);

  json_attr_uint (json_ctx, "align1", (double) align1);

  json_attr_uint (json_ctx, "align2", (double) align2);

  json_array_begin (json_ctx, "timings");

  FOR_EACH_IMPL (impl, 0)

    do_one_test (json_ctx, impl, s2, s1, len);

  json_array_end (json_ctx);

  json_element_object_end (json_ctx);

}

int

test_main (void)

{

  json_ctx_t json_ctx;

  size_t i;

  test_init ();

  json_init (&json_ctx, 0, stdout);

  json_document_begin (&json_ctx);

  json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);

  json_attr_object_begin (&json_ctx, "functions");

  json_attr_object_begin (&json_ctx, TEST_NAME);

  json_attr_string (&json_ctx, "bench-variant", "default");

  json_array_begin (&json_ctx, "ifuncs");

  FOR_EACH_IMPL (impl, 0)

    json_element_string (&json_ctx, impl->name);

  json_array_end (&json_ctx);

  json_array_begin (&json_ctx, "results");

  for (i = 0; i < 18; ++i)

    {

      do_test (&json_ctx, 0, 0, 1 << i);

      do_test (&json_ctx, i, 0, 1 << i);

      do_test (&json_ctx, 0, i, 1 << i);

      do_test (&json_ctx, i, i, 1 << i);

    }

  for (i = 0; i < 32; ++i)

    {

      do_test (&json_ctx, 0, 0, i);

      do_test (&json_ctx, i, 0, i);

      do_test (&json_ctx, 0, i, i);

      do_test (&json_ctx, i, i, i);

    }

  for (i = 3; i < 32; ++i)

    {

      if ((i & (i - 1)) == 0)

	continue;

      do_test (&json_ctx, 0, 0, 16 * i);

      do_test (&json_ctx, i, 0, 16 * i);

      do_test (&json_ctx, 0, i, 16 * i);

      do_test (&json_ctx, i, i, 16 * i);

    }

  for (i = 32; i < 64; ++i)

    {

      do_test (&json_ctx, 0, 0, 32 * i);

      do_test (&json_ctx, i, 0, 32 * i);

      do_test (&json_ctx, 0, i, 32 * i);

      do_test (&json_ctx, i, i, 32 * i);

    }

  do_test (&json_ctx, 0, 0, getpagesize ());

  json_array_end (&json_ctx);

  json_attr_object_end (&json_ctx);

  json_attr_object_end (&json_ctx);

  json_document_end (&json_ctx);

  return ret;

}

#include <support/test-driver.c>