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

/* Test and measure memcmp 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.

   Added wmemcmp support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011.

   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 WIDE

# define TEST_NAME "wmemcmp"

#else

# define TEST_NAME "memcmp"

#endif

#include "test-string.h"

#ifdef WIDE

# include <inttypes.h>

# include <wchar.h>

# define MEMCMP wmemcmp

# define MEMCPY wmemcpy

# define SIMPLE_MEMCMP simple_wmemcmp

# define CHAR wchar_t

# define UCHAR wchar_t

# define CHARBYTES 4

# define CHAR__MIN WCHAR_MIN

# define CHAR__MAX WCHAR_MAX

int

simple_wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n)

{

  int ret = 0;

  /* Warning!

	wmemcmp has to use SIGNED comparison for elements.

	memcmp has to use UNSIGNED comparison for elemnts.

  */

  while (n-- && (ret = *s1 < *s2 ? -1 : *s1 == *s2 ? 0 : 1) == 0) {s1++; s2++;}

  return ret;

}

#else

# include <limits.h>

# define MEMCMP memcmp

# define MEMCPY memcpy

# define SIMPLE_MEMCMP simple_memcmp

# define CHAR char

# define MAX_CHAR 255

# define UCHAR unsigned char

# define CHARBYTES 1

# define CHAR__MIN CHAR_MIN

# define CHAR__MAX CHAR_MAX

int

simple_memcmp (const char *s1, const char *s2, size_t n)

{

  int ret = 0;

  while (n-- && (ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) == 0);

  return ret;

}

#endif

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

IMPL (SIMPLE_MEMCMP, 0)

IMPL (MEMCMP, 1)

static int

check_result (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t len,

	      int exp_result)

{

  int result = CALL (impl, s1, s2, len);

  if ((exp_result == 0 && result != 0)

      || (exp_result < 0 && result >= 0)

      || (exp_result > 0 && result <= 0))

    {

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

	     result, exp_result);

      ret = 1;

      return -1;

    }

  return 0;

}

static void

do_one_test (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t len,

	     int exp_result)

{

  if (check_result (impl, s1, s2, len, exp_result) < 0)

    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, s1, s2, len);

	  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, int exp_result)

{

  size_t i;

  CHAR *s1, *s2;

  if (len == 0)

    return;

  align1 &= 63;

  if (align1 + (len + 1) * CHARBYTES >= page_size)

    return;

  align2 &= 63;

  if (align2 + (len + 1) * CHARBYTES >= page_size)

    return;

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

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

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

    s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX;

  s1[len] = align1;

  s2[len] = align2;

  s2[len - 1] -= exp_result;

  if (HP_TIMING_AVAIL)

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

  FOR_EACH_IMPL (impl, 0)

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

  if (HP_TIMING_AVAIL)

    putchar ('\n');

}

static void

do_random_tests (void)

{

  size_t i, j, n, align1, align2, pos, len;

  int result;

  long r;

  UCHAR *p1 =  (UCHAR *) (buf1 + page_size - 512 * CHARBYTES);

  UCHAR *p2 =  (UCHAR *) (buf2 + page_size - 512 * CHARBYTES);

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

    {

   align1 = random () & 31;

      if (random () & 1)

	align2 = random () & 31;

      else

	align2 = align1 + (random () & 24);

      pos = random () & 511;

      j = align1;

      if (align2 > j)

	j = align2;

      if (pos + j >= 512)

	pos = 511 - j - (random () & 7);

      len = random () & 511;

      if (len + j >= 512)

	len = 511 - j - (random () & 7);

      j = len + align1 + 64;

      if (j > 512) j = 512;

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

	p1[i] = random () & 255;

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

	p2[i] = random () & 255;

      result = 0;

      if (pos >= len)

	MEMCPY ((CHAR *) p2 + align2, (const CHAR *) p1 + align1, len);

      else

	{

	  MEMCPY ((CHAR *) p2 + align2, (const CHAR *) p1 + align1, pos);

	  if (p2[align2 + pos] == p1[align1 + pos])

	    {

	      p2[align2 + pos] = random () & 255;

	      if (p2[align2 + pos] == p1[align1 + pos])

		p2[align2 + pos] = p1[align1 + pos] + 3 + (random () & 127);

	    }

	  if (p1[align1 + pos] < p2[align2 + pos])

	    result = -1;

	  else

	    result = 1;

	}

      FOR_EACH_IMPL (impl, 1)

	{

	  r = CALL (impl, (CHAR *) p1 + align1, (const CHAR *) p2 + align2,

		    len);

	  if ((r == 0 && result)

	      || (r < 0 && result >= 0)

	      || (r > 0 && result <= 0))

	    {

	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",

		     n, impl->name, align1 * CHARBYTES & 63,  align2 * CHARBYTES & 63, len, pos, r, result, p1, p2);

	      ret = 1;

	    }

	}

    }

}

static void

check1 (void)

{

  CHAR s1[116], s2[116];

  int n, exp_result;

  s1[0] = -108;

  s2[0] = -108;

  s1[1] = 99;

  s2[1] = 99;

  s1[2] = -113;

  s2[2] = -113;

  s1[3] = 1;

  s2[3] = 1;

  s1[4] = 116;

  s2[4] = 116;

  s1[5] = 99;

  s2[5] = 99;

  s1[6] = -113;

  s2[6] = -113;

  s1[7] = 1;

  s2[7] = 1;

  s1[8] = 84;

  s2[8] = 84;

  s1[9] = 99;

  s2[9] = 99;

  s1[10] = -113;

  s2[10] = -113;

  s1[11] = 1;

  s2[11] = 1;

  s1[12] = 52;

  s2[12] = 52;

  s1[13] = 99;

  s2[13] = 99;

  s1[14] = -113;

  s2[14] = -113;

  s1[15] = 1;

  s2[15] = 1;

  s1[16] = -76;

  s2[16] = -76;

  s1[17] = -14;

  s2[17] = -14;

  s1[18] = -109;

  s2[18] = -109;

  s1[19] = 1;

  s2[19] = 1;

  s1[20] = -108;

  s2[20] = -108;

  s1[21] = -14;

  s2[21] = -14;

  s1[22] = -109;

  s2[22] = -109;

  s1[23] = 1;

  s2[23] = 1;

  s1[24] = 84;

  s2[24] = 84;

  s1[25] = -15;

  s2[25] = -15;

  s1[26] = -109;

  s2[26] = -109;

  s1[27] = 1;

  s2[27] = 1;

  s1[28] = 52;

  s2[28] = 52;

  s1[29] = -15;

  s2[29] = -15;

  s1[30] = -109;

  s2[30] = -109;

  s1[31] = 1;

  s2[31] = 1;

  s1[32] = 20;

  s2[32] = 20;

  s1[33] = -15;

  s2[33] = -15;

  s1[34] = -109;

  s2[34] = -109;

  s1[35] = 1;

  s2[35] = 1;

  s1[36] = 20;

  s2[36] = 20;

  s1[37] = -14;

  s2[37] = -14;

  s1[38] = -109;

  s2[38] = -109;

  s1[39] = 1;

  s2[39] = 1;

  s1[40] = 52;

  s2[40] = 52;

  s1[41] = -14;

  s2[41] = -14;

  s1[42] = -109;

  s2[42] = -109;

  s1[43] = 1;

  s2[43] = 1;

  s1[44] = 84;

  s2[44] = 84;

  s1[45] = -14;

  s2[45] = -14;

  s1[46] = -109;

  s2[46] = -109;

  s1[47] = 1;

  s2[47] = 1;

  s1[48] = 116;

  s2[48] = 116;

  s1[49] = -14;

  s2[49] = -14;

  s1[50] = -109;

  s2[50] = -109;

  s1[51] = 1;

  s2[51] = 1;

  s1[52] = 116;

  s2[52] = 116;

  s1[53] = -15;

  s2[53] = -15;

  s1[54] = -109;

  s2[54] = -109;

  s1[55] = 1;

  s2[55] = 1;

  s1[56] = -44;

  s2[56] = -44;

  s1[57] = -14;

  s2[57] = -14;

  s1[58] = -109;

  s2[58] = -109;

  s1[59] = 1;

  s2[59] = 1;

  s1[60] = -108;

  s2[60] = -108;

  s1[61] = -15;

  s2[61] = -15;

  s1[62] = -109;

  s2[62] = -109;

  s1[63] = 1;

  s2[63] = 1;

  s1[64] = -76;

  s2[64] = -76;

  s1[65] = -15;

  s2[65] = -15;

  s1[66] = -109;

  s2[66] = -109;

  s1[67] = 1;

  s2[67] = 1;

  s1[68] = -44;

  s2[68] = -44;

  s1[69] = -15;

  s2[69] = -15;

  s1[70] = -109;

  s2[70] = -109;

  s1[71] = 1;

  s2[71] = 1;

  s1[72] = -12;

  s2[72] = -12;

  s1[73] = -15;

  s2[73] = -15;

  s1[74] = -109;

  s2[74] = -109;

  s1[75] = 1;

  s2[75] = 1;

  s1[76] = -12;

  s2[76] = -12;

  s1[77] = -14;

  s2[77] = -14;

  s1[78] = -109;

  s2[78] = -109;

  s1[79] = 1;

  s2[79] = 1;

  s1[80] = 20;

  s2[80] = -68;

  s1[81] = -12;

  s2[81] = 64;

  s1[82] = -109;

  s2[82] = -106;

  s1[83] = 1;

  s2[83] = 1;

  s1[84] = -12;

  s2[84] = -12;

  s1[85] = -13;

  s2[85] = -13;

  s1[86] = -109;

  s2[86] = -109;

  s1[87] = 1;

  s2[87] = 1;

  s1[88] = -44;

  s2[88] = -44;

  s1[89] = -13;

  s2[89] = -13;

  s1[90] = -109;

  s2[90] = -109;

  s1[91] = 1;

  s2[91] = 1;

  s1[92] = -76;

  s2[92] = -76;

  s1[93] = -13;

  s2[93] = -13;

  s1[94] = -109;

  s2[94] = -109;

  s1[95] = 1;

  s2[95] = 1;

  s1[96] = -108;

  s2[96] = -108;

  s1[97] = -13;

  s2[97] = -13;

  s1[98] = -109;

  s2[98] = -109;

  s1[99] = 1;

  s2[99] = 1;

  s1[100] = 116;

  s2[100] = 116;

  s1[101] = CHAR__MIN;

  s2[101] = CHAR__MAX;

  s1[102] = -109;

  s2[102] = -109;

  s1[103] = 1;

  s2[103] = 1;

  s1[104] = 84;

  s2[104] = 84;

  s1[105] = -13;

  s2[105] = -13;

  s1[106] = -109;

  s2[106] = -109;

  s1[107] = 1;

  s2[107] = 1;

  s1[108] = 52;

  s2[108] = 52;

  s1[109] = -13;

  s2[109] = -13;

  s1[110] = -109;

  s2[110] = -109;

  s1[111] = 1;

  s2[111] = 1;

  s1[112] = CHAR__MAX;

  s2[112] = CHAR__MIN;

  s1[113] = -13;

  s2[113] = -13;

  s1[114] = -109;

  s2[114] = -109;

  s1[115] = 1;

  s2[115] = 1;

  n = 116;

  for (size_t i = 0; i < n; i++)

    {

      exp_result = SIMPLE_MEMCMP (s1 + i, s2 + i, n - i);

      FOR_EACH_IMPL (impl, 0)

	check_result (impl, s1 + i, s2 + i, n - i, exp_result);

    }

}

int

test_main (void)

{

  size_t i;

  test_init ();

  check1 ();

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

  FOR_EACH_IMPL (impl, 0)

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

  putchar ('\n');

  for (i = 1; i < 16; ++i)

    {

      do_test (i * CHARBYTES, i * CHARBYTES, i, 0);

      do_test (i * CHARBYTES, i * CHARBYTES, i, 1);

      do_test (i * CHARBYTES, i * CHARBYTES, i, -1);

    }

  for (i = 0; i < 16; ++i)

    {

      do_test (0, 0, i, 0);

      do_test (0, 0, i, 1);

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

    }

  for (i = 1; i < 10; ++i)

    {

      do_test (0, 0, 2 << i, 0);

      do_test (0, 0, 2 << i, 1);

      do_test (0, 0, 2 << i, -1);

      do_test (0, 0, 16 << i, 0);

      do_test ((8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);

      do_test (0, 0, 16 << i, 1);

      do_test (0, 0, 16 << i, -1);

    }

  for (i = 1; i < 8; ++i)

    {

      do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);

      do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);

      do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, -1);

    }

  do_random_tests ();

  return ret;

}

#include "test-skeleton.c"