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

/* Test and measure memmove functions.

   Copyright (C) 1999-2012 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, see

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

#define TEST_MAIN

#ifdef TEST_BCOPY

# define TEST_NAME "bcopy"

#else

# define TEST_NAME "memmove"

#endif

#include "test-string.h"

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

#ifdef TEST_BCOPY

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

void simple_bcopy (const char *, char *, size_t);

IMPL (simple_bcopy, 0)

IMPL (bcopy, 1)

void

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

{

  simple_memmove (dst, src, n);

}

#else

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

IMPL (simple_memmove, 0)

IMPL (memmove, 1)

#endif

char *

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

{

  char *ret = dst;

  if (src < dst)

    {

      dst += n;

      src += n;

      while (n--)

	*--dst = *--src;

    }

  else

    while (n--)

      *dst++ = *src++;

  return ret;

}

static void

do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,

	     size_t len)

{

  memcpy (src, orig_src, len);

#ifdef TEST_BCOPY

  CALL (impl, src, dst, len);

#else

  char *res;

  res = CALL (impl, dst, src, len);

  if (res != dst)

    {

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

	     res, dst);

      ret = 1;

      return;

    }

#endif

  if (memcmp (dst, orig_src, len) != 0)

    {

      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",

	     impl->name, dst, src);

      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);

#ifdef TEST_BCOPY

	  CALL (impl, src, dst, len);

#else

	  CALL (impl, dst, src, len);

#endif

	  HP_TIMING_NOW (stop);

	  HP_TIMING_BEST (best_time, start, stop);

	}

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

    }

}

static void

do_test (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;

  if (HP_TIMING_AVAIL)

    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);

  if (HP_TIMING_AVAIL)

    putchar ('\n');

}

static void

do_random_tests (void)

{

  size_t i, n, align1, align2, len, size;

  size_t srcstart, srcend, dststart, dstend;

  int c;

  unsigned char *p1, *p2;

#ifndef TEST_BCOPY

  unsigned char *res;

#endif

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

    {

      if ((random () & 255) == 0)

	size = 65536;

      else

	size = 512;

      if (size > page_size)

	size = page_size;

      if ((random () & 3) == 0)

	{

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

	  align1 = size - len - (random () & 31);

	  align2 = size - len - (random () & 31);

	  if (align1 > size)

	    align1 = 0;

	  if (align2 > size)

	    align2 = 0;

	}

      else

	{

	  align1 = random () & (size / 2 - 1);

	  align2 = random () & (size / 2 - 1);

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

	  if (align1 + len > size)

	    align1 = size - len;

	  if (align2 + len > size)

	    align2 = size - len;

	}

      p1 = buf1 + page_size - size;

      p2 = buf2 + page_size - size;

      c = random () & 255;

      srcend = align1 + len + 256;

      if (srcend > size)

	srcend = size;

      if (align1 > 256)

	srcstart = align1 - 256;

      else

	srcstart = 0;

      for (i = srcstart; i < srcend; ++i)

	p1[i] = random () & 255;

      dstend = align2 + len + 256;

      if (dstend > size)

	dstend = size;

      if (align2 > 256)

	dststart = align2 - 256;

      else

	dststart = 0;

      FOR_EACH_IMPL (impl, 1)

	{

	  memset (p2 + dststart, c, dstend - dststart);

	  memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);

#ifdef TEST_BCOPY

	  CALL (impl, (char *) (p2 + align1), (char *) (p2 + align2), len);

#else

	  res = (unsigned char *) CALL (impl,

					(char *) (p2 + align2),

					(char *) (p2 + align1), len);

	  if (res != p2 + align2)

	    {

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

		     n, impl->name, align1, align2, len, res, p2 + align2);

	      ret = 1;

	    }

#endif

	  if (memcmp (p1 + align1, p2 + align2, len))

	    {

	      error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",

		     n, impl->name, align1, align2, len);

	      ret = 1;

	    }

	  for (i = dststart; i < dstend; ++i)

	    {

	      if (i >= align2 && i < align2 + len)

		{

		  i = align2 + len - 1;

		  continue;

		}

	      if (i >= srcstart && i < srcend)

		{

		  i = srcend - 1;

		  continue;

		}

	      if (p2[i] != c)

		{

		  error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",

			 n, impl->name, align1, align2, len);

		  ret = 1;

		  break;

		}

	    }

	  if (srcstart < align2

	      && memcmp (p2 + srcstart, p1 + srcstart,

			 (srcend > align2 ? align2 : srcend) - srcstart))

	    {

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

		     n, impl->name, align1, align2, len);

	      ret = 1;

	      break;

	    }

	  i = srcstart > align2 + len ? srcstart : align2 + len;

	  if (srcend > align2 + len

	      && memcmp (p2 + i, p1 + i, srcend - i))

	    {

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

		     n, impl->name, align1, align2, len);

	      ret = 1;

	      break;

	    }

	}

    }

}

int

test_main (void)

{

  size_t i;

  test_init ();

  printf ("%23s", "");

  FOR_EACH_IMPL (impl, 0)

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

  putchar ('\n');

  for (i = 0; i < 14; ++i)

    {

      do_test (0, 32, 1 << i);

      do_test (32, 0, 1 << i);

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

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

    }

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

    {

      do_test (0, 32, i);

      do_test (32, 0, i);

      do_test (0, i, i);

      do_test (i, 0, i);

    }

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

    {

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

	continue;

      do_test (0, 32, 16 * i);

      do_test (32, 0, 16 * i);

      do_test (0, i, 16 * i);

      do_test (i, 0, 16 * i);

    }

  do_random_tests ();

  return ret;

}

#include "test-skeleton.c"