~linaro-toolchain-dev/cortex-strings/trunk

/* Test and measure memset functions.

   Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Written by Jakub Jelinek <jakub@redhat.com>, 1999.

   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, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#define TEST_MAIN

#define MIN_PAGE_SIZE 131072

#include "test-string.h"

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

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

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

IMPL (simple_memset, 0)

IMPL (builtin_memset, 0)

IMPL (memset, 1)

char *

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

{

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

  while (r < end)

    *r++ = c;

  return s;

}

char *

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

{

  return __builtin_memset (s, c, n);

}

static void

do_one_test (impl_t *impl, char *s, int c, size_t n)

{

  char *res = CALL (impl, s, c, n);

  char tstbuf[n];

  if (res != s

      || simple_memset (tstbuf, c, n) != tstbuf

      || memcmp (s, tstbuf, n) != 0)

    {

      error (0, 0, "Wrong result in function %s", impl->name);

      ret = 1;

      return;

    }

  if (HP_TIMING_AVAIL)

    {

      hp_timing_t start __attribute ((unused));

      hp_timing_t stop __attribute ((unused));

      hp_timing_t best_time = ~ (hp_timing_t) 0;

      size_t i;

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

	{

	  HP_TIMING_NOW (start);

	  CALL (impl, s, c, n);

	  HP_TIMING_NOW (stop);

	  HP_TIMING_BEST (best_time, start, stop);

	}

      printf ("\t%zd", (size_t) best_time);

    }

}

static void

do_test (size_t align, int c, size_t len)

{

  align &= 7;

  if (align + len > page_size)

    return;

  if (HP_TIMING_AVAIL)

    printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);

  FOR_EACH_IMPL (impl, 0)

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

  if (HP_TIMING_AVAIL)

    putchar ('\n');

}

static void

do_random_tests (void)

{

  size_t i, j, k, n, align, len, size;

  int c, o;

  unsigned char *p, *res;

  for (i = 0; i < 65536; ++i)

    buf2[i] = random () & 255;

  for (n = 0; n < ITERATIONS; n++)

    {

      if ((random () & 31) == 0)

	size = 65536;

      else

	size = 512;

      p = buf1 + page_size - size;

      len = random () & (size - 1);

      align = size - len - (random () & 31);

      if (align > size)

	align = size - len;

      if ((random () & 7) == 0)

	align &= ~63;

      if ((random () & 7) == 0)

	c = 0;

      else

	c = random () & 255;

      o = random () & 255;

      if (o == c)

        o = (c + 1) & 255;

      j = len + align + 128;

      if (j > size)

	j = size;

      if (align >= 128)

	k = align - 128;

      else

	k = 0;

      for (i = k; i < align; ++i)

	p[i] = o;

      for (i = align + len; i < j; ++i)

	p[i] = o;

      FOR_EACH_IMPL (impl, 1)

	{

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

	    {

	      p[i + align] = buf2[i];

	      if (p[i + align] == c)

		p[i + align] = o;

	    }

	  res = (unsigned char *) CALL (impl, (char *) p + align, c, len);

	  if (res != p + align)

	    {

	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd) %p != %p",

		     n, impl->name, align, c, len, res, p + align);

	      ret = 1;

	    }

	  for (i = k; i < align; ++i)

	    if (p[i] != o)

	      {

		error (0, 0, "Iteration %zd - garbage before %s (%zd, %d, %zd)",

		       n, impl->name, align, c, len);

		ret = 1;

		break;

	      }

	  for (; i < align + len; ++i)

	    if (p[i] != c)

	      {

		error (0, 0, "Iteration %zd - not cleared correctly %s (%zd, %d, %zd)",

		       n, impl->name, align, c, len);

		ret = 1;

		break;

	      }

	  for (; i < j; ++i)

	    if (p[i] != o)

	      {

		error (0, 0, "Iteration %zd - garbage after %s (%zd, %d, %zd)",

		       n, impl->name, align, c, len);

		ret = 1;

		break;

	      }

	}

    }

}

int

test_main (void)

{

  size_t i;

  int c;

  test_init ();

  printf ("%24s", "");

  FOR_EACH_IMPL (impl, 0)

    printf ("\t%s", impl->name);

  putchar ('\n');

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

    {

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

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

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

	{

	  do_test (i, c, i);

	  if (i & (i - 1))

	    do_test (0, c, i);

	}

      do_test (1, c, 14);

      do_test (3, c, 1024);

      do_test (4, c, 64);

      do_test (2, c, 25);

    }

  do_random_tests ();

  return ret;

}

#include "test-skeleton.c"