/* Measure memset 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/>.  */

#define TEST_MAIN

#ifdef TEST_BZERO

# define TEST_NAME "bzero"

#else

# ifndef WIDE

#  define TEST_NAME "memset"

# else

#  define TEST_NAME "wmemset"

# endif /* WIDE */

#endif /* !TEST_BZERO */

#define MIN_PAGE_SIZE 131072

#include "bench-string.h"

#ifndef WIDE

# define MEMSET memset

# define CHAR char

# define SIMPLE_MEMSET simple_memset

# define MEMCMP memcmp

#else

# include <wchar.h>

# define MEMSET wmemset

# define CHAR wchar_t

# define SIMPLE_MEMSET simple_wmemset

# define MEMCMP wmemcmp

#endif /* WIDE */

#include "json-lib.h"

CHAR *SIMPLE_MEMSET (CHAR *, int, size_t);

#ifdef TEST_BZERO

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

void simple_bzero (char *, size_t);

void builtin_bzero (char *, size_t);

IMPL (simple_bzero, 0)

IMPL (builtin_bzero, 0)

IMPL (bzero, 1)

void

simple_bzero (char *s, size_t n)

{

  SIMPLE_MEMSET (s, 0, n);

}

void

builtin_bzero (char *s, size_t n)

{

  __builtin_bzero (s, n);

}

#else

typedef CHAR *(*proto_t) (CHAR *, int, size_t);

IMPL (SIMPLE_MEMSET, 0)

# ifndef WIDE

char *builtin_memset (char *, int, size_t);

IMPL (builtin_memset, 0)

# endif /* !WIDE */

IMPL (MEMSET, 1)

# ifndef WIDE

char *

builtin_memset (char *s, int c, size_t n)

{

  return __builtin_memset (s, c, n);

}

# endif /* !WIDE */

#endif /* !TEST_BZERO */

CHAR *

inhibit_loop_to_libcall

SIMPLE_MEMSET (CHAR *s, int c, size_t n)

{

  CHAR *r = s, *end = s + n;

  while (r < end)

    *r++ = c;

  return s;

}

static void

do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s,

	     int c __attribute ((unused)), size_t n)

{

  size_t i, iters = INNER_LOOP_ITERS;

  timing_t start, stop, cur;

  TIMING_NOW (start);

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

    {

#ifdef TEST_BZERO

      CALL (impl, s, n);

#else

      CALL (impl, s, c, n);

#endif /* !TEST_BZERO */

    }

  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 align, int c, size_t len)

{

  align &= 63;

  if ((align + len) * sizeof (CHAR) > page_size)

    return;

  json_element_object_begin (json_ctx);

  json_attr_uint (json_ctx, "length", len);

  json_attr_uint (json_ctx, "alignment", align);

  json_attr_int (json_ctx, "char", c);

  json_array_begin (json_ctx, "timings");

  FOR_EACH_IMPL (impl, 0)

    {

      do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len);

      realloc_bufs ();

    }

  json_array_end (json_ctx);

  json_element_object_end (json_ctx);

}

int

test_main (void)

{

  json_ctx_t json_ctx;

  size_t i;

  int c = 0;

  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", "");

  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");

#ifndef TEST_BZERO

  for (c = -65; c <= 130; c += 65)

#endif

    {

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

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

      for (i = 1; i < 32; ++i)

	{

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

	  if (i & (i - 1))

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

	}

      for (i = 32; i < 512; i+=32)

	{

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

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

	}

      do_test (&json_ctx, 1, c, 14);

      do_test (&json_ctx, 3, c, 1024);

      do_test (&json_ctx, 4, c, 64);

      do_test (&json_ctx, 2, c, 25);

    }

  for (i = 33; i <= 256; i += 4)

    {

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

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

    }

  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>