Subversion Repositories openrisc

typedef __SIZE_TYPE__ size_t;

static int mymemcmp1 (unsigned long int, unsigned long int)

  __attribute__ ((__nothrow__));

__inline static int

mymemcmp1 (unsigned long int a, unsigned long int b)

{

  long int srcp1 = (long int) &a;

  long int srcp2 = (long int) &b;

  unsigned long int a0, b0;

  do

    {

      a0 = ((unsigned char *) srcp1)[0];

      b0 = ((unsigned char *) srcp2)[0];

      srcp1 += 1;

      srcp2 += 1;

    }

  while (a0 == b0);

  return a0 - b0;

}

static int mymemcmp2 (long, long, size_t) __attribute__ ((__nothrow__));

static int

mymemcmp2 (long int srcp1, long int srcp2, size_t len)

{

  unsigned long int a0, a1;

  unsigned long int b0, b1;

  switch (len % 4)

    {

    default:

    case 2:

      a0 = ((unsigned long int *) srcp1)[0];

      b0 = ((unsigned long int *) srcp2)[0];

      srcp1 -= 2 * (sizeof (unsigned long int));

      srcp2 -= 2 * (sizeof (unsigned long int));

      len += 2;

      goto do1;

    case 3:

      a1 = ((unsigned long int *) srcp1)[0];

      b1 = ((unsigned long int *) srcp2)[0];

      srcp1 -= (sizeof (unsigned long int));

      srcp2 -= (sizeof (unsigned long int));

      len += 1;

      goto do2;

    case 0:

      if (16 <= 3 * (sizeof (unsigned long int)) && len == 0)

        return 0;

      a0 = ((unsigned long int *) srcp1)[0];

      b0 = ((unsigned long int *) srcp2)[0];

      goto do3;

    case 1:

      a1 = ((unsigned long int *) srcp1)[0];

      b1 = ((unsigned long int *) srcp2)[0];

      srcp1 += (sizeof (unsigned long int));

      srcp2 += (sizeof (unsigned long int));

      len -= 1;

      if (16 <= 3 * (sizeof (unsigned long int)) && len == 0)

        goto do0;

    }

  do

    {

      a0 = ((unsigned long int *) srcp1)[0];

      b0 = ((unsigned long int *) srcp2)[0];

      if (a1 != b1)

        return mymemcmp1 ((a1), (b1));

    do3:

      a1 = ((unsigned long int *) srcp1)[1];

      b1 = ((unsigned long int *) srcp2)[1];

      if (a0 != b0)

        return mymemcmp1 ((a0), (b0));

    do2:

      a0 = ((unsigned long int *) srcp1)[2];

      b0 = ((unsigned long int *) srcp2)[2];

      if (a1 != b1)

        return mymemcmp1 ((a1), (b1));

    do1:

      a1 = ((unsigned long int *) srcp1)[3];

      b1 = ((unsigned long int *) srcp2)[3];

      if (a0 != b0)

        return mymemcmp1 ((a0), (b0));

      srcp1 += 4 * (sizeof (unsigned long int));

      srcp2 += 4 * (sizeof (unsigned long int));

      len -= 4;

    }

  while (len != 0);

do0:

  if (a1 != b1)

    return mymemcmp1 ((a1), (b1));

  return 0;

}

static int mymemcmp3 (long, long, size_t) __attribute__ ((__nothrow__));

static int

mymemcmp3 (long int srcp1, long int srcp2, size_t len)

{

  unsigned long int a0, a1, a2, a3;

  unsigned long int b0, b1, b2, b3;

  unsigned long int x;

  int shl, shr;

  shl = 8 * (srcp1 % (sizeof (unsigned long int)));

  shr = 8 * (sizeof (unsigned long int)) - shl;

  srcp1 &= -(sizeof (unsigned long int));

  switch (len % 4)

    {

    default:

    case 2:

      a1 = ((unsigned long int *) srcp1)[0];

      a2 = ((unsigned long int *) srcp1)[1];

      b2 = ((unsigned long int *) srcp2)[0];

      srcp1 -= 1 * (sizeof (unsigned long int));

      srcp2 -= 2 * (sizeof (unsigned long int));

      len += 2;

      goto do1;

    case 3:

      a0 = ((unsigned long int *) srcp1)[0];

      a1 = ((unsigned long int *) srcp1)[1];

      b1 = ((unsigned long int *) srcp2)[0];

      srcp2 -= 1 * (sizeof (unsigned long int));

      len += 1;

      goto do2;

    case 0:

      if (16 <= 3 * (sizeof (unsigned long int)) && len == 0)

        return 0;

      a3 = ((unsigned long int *) srcp1)[0];

      a0 = ((unsigned long int *) srcp1)[1];

      b0 = ((unsigned long int *) srcp2)[0];

      srcp1 += 1 * (sizeof (unsigned long int));

      goto do3;

    case 1:

      a2 = ((unsigned long int *) srcp1)[0];

      a3 = ((unsigned long int *) srcp1)[1];

      b3 = ((unsigned long int *) srcp2)[0];

      srcp1 += 2 * (sizeof (unsigned long int));

      srcp2 += 1 * (sizeof (unsigned long int));

      len -= 1;

      if (16 <= 3 * (sizeof (unsigned long int)) && len == 0)

        goto do0;

    }

  do

    {

      a0 = ((unsigned long int *) srcp1)[0];

      b0 = ((unsigned long int *) srcp2)[0];

      x = (((a2) >> (shl)) | ((a3) << (shr)));

      if (x != b3)

        return mymemcmp1 ((x), (b3));

    do3:

      a1 = ((unsigned long int *) srcp1)[1];

      b1 = ((unsigned long int *) srcp2)[1];

      x = (((a3) >> (shl)) | ((a0) << (shr)));

      if (x != b0)

        return mymemcmp1 ((x), (b0));

    do2:

      a2 = ((unsigned long int *) srcp1)[2];

      b2 = ((unsigned long int *) srcp2)[2];

      x = (((a0) >> (shl)) | ((a1) << (shr)));

      if (x != b1)

        return mymemcmp1 ((x), (b1));

    do1:

      a3 = ((unsigned long int *) srcp1)[3];

      b3 = ((unsigned long int *) srcp2)[3];

      x = (((a1) >> (shl)) | ((a2) << (shr)));

      if (x != b2)

        return mymemcmp1 ((x), (b2));

      srcp1 += 4 * (sizeof (unsigned long int));

      srcp2 += 4 * (sizeof (unsigned long int));

      len -= 4;

    }

  while (len != 0);

do0:

  x = (((a2) >> (shl)) | ((a3) << (shr)));

  if (x != b3)

    return mymemcmp1 ((x), (b3));

  return 0;

}

__attribute__ ((noinline))

int mymemcmp (const void *s1, const void *s2, size_t len)

{

  unsigned long int a0;

  unsigned long int b0;

  long int srcp1 = (long int) s1;

  long int srcp2 = (long int) s2;

  if (srcp1 % (sizeof (unsigned long int)) == 0)

    return mymemcmp2 (srcp1, srcp2, len / (sizeof (unsigned long int)));

  else

    return mymemcmp3 (srcp1, srcp2, len / (sizeof (unsigned long int)));

}

char buf[256];

int

main (void)

{

  char *p;

  union { long int l; char c[sizeof (long int)]; } u;

  /* The test above assumes little endian and long being the same size

     as pointer.  */

  if (sizeof (long int) != sizeof (void *) || sizeof (long int) < 4)

    return 0;

  u.l = 0x12345678L;

  if (u.c[0] != 0x78 || u.c[1] != 0x56 || u.c[2] != 0x34 || u.c[3] != 0x12)

    return 0;

  p = buf + 16 - (((long int) buf) & 15);

  __builtin_memcpy (p + 9,

"\x1\x37\x82\xa7\x55\x49\x9d\xbf\xf8\x44\xb6\x55\x17\x8e\xf9", 15);

  __builtin_memcpy (p + 128 + 24,

"\x1\x37\x82\xa7\x55\x49\xd0\xf3\xb7\x2a\x6d\x23\x71\x49\x6a", 15);

  if (mymemcmp (p + 9, p + 128 + 24, 33) != -51)

    __builtin_abort ();

  return 0;

}