Exemple #1
0
INLINE void *memcpy(void *s1, const void *s2, size_t n)

{
	
  unsigned long int dstp = (long int) s1;
  unsigned long int srcp = (long int) s2;

  /* Copy from the beginning to the end.  */

  /* If there not too few bytes to copy, use word copy.  */
  if (n >= OP_T_THRES)
    {
      /* Copy just a few bytes to make DSTP aligned.  */
      n -= (-dstp) % OPSIZ;
      BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);

      /* Copy from SRCP to DSTP taking advantage of the known
	 alignment of DSTP.  Number of bytes remaining is put
	 in the third argument, i.e. in n.  This number may
	 vary from machine to machine.  */

      WORD_COPY_FWD (dstp, srcp, n, n);

      /* Fall out and copy the tail.  */
    }

  /* There are just a few bytes to copy.  Use byte memory operations.  */
  BYTE_COPY_FWD (dstp, srcp, n);

  return s1;

}
Exemple #2
0
void *memcpy(void *dstpp, const void *srcpp, size_t len)
{
	unsigned long int dstp = (long int) dstpp;
	unsigned long int srcp = (long int) srcpp;

	/* Copy from the beginning to the end.  */

	/* If there not too few bytes to copy, use word copy.  */
	if (len >= OP_T_THRES) {
		/* Copy just a few bytes to make DSTP aligned.  */
		len -= (-dstp) % OPSIZ;
		BYTE_COPY_FWD(dstp, srcp, (-dstp) % OPSIZ);

		/* Copy whole pages from SRCP to DSTP by virtual address
		   manipulation, as much as possible.  */

		/* PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len); */

		/* Copy from SRCP to DSTP taking advantage of the known
		   alignment of DSTP. Number of bytes remaining is put in the
		   third argument, i.e. in LEN.  This number may vary from
		   machine to machine. */

		WORD_COPY_FWD(dstp, srcp, len, len);

		/* Fall out and copy the tail. */
	}

	/* There are just a few bytes to copy.  Use byte memory operations. */
	BYTE_COPY_FWD(dstp, srcp, len);

	return dstpp;
}
Exemple #3
0
void * memmove (void * destpp, void * srcpp, size_t len)
{
    unsigned long int dstp = (long int) destpp;
    unsigned long int srcp = (long int) srcpp;

    /* This test makes the forward copying code be used whenever possible.
       Reduces the working set.  */
    if (dstp - srcp >= len) { /* *Unsigned* compare!  */
        /* Copy from the beginning to the end.  */

        /* If there not too few bytes to copy, use word copy.  */
        if (len >= OP_T_THRES) {
            /* Copy just a few bytes to make DSTP aligned.  */
            len -= (-dstp) % OPSIZ;
            BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);

            /* Copy from SRCP to DSTP taking advantage of the known
               alignment of DSTP.  Number of bytes remaining is put
               in the third argument, i.e. in LEN.  This number may
               vary from machine to machine.  */
            WORD_COPY_FWD (dstp, srcp, len, len);

            /* Fall out and copy the tail.  */
        }

        /* There are just a few bytes to copy.  Use byte memory operations.  */
        BYTE_COPY_FWD (dstp, srcp, len);
    } else {
        /* Copy from the end to the beginning.  */
        srcp += len;
        dstp += len;

        /* If there not too few bytes to copy, use word copy.  */
        if (len >= OP_T_THRES) {
            /* Copy just a few bytes to make DSTP aligned.  */
            len -= dstp % OPSIZ;
            BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);

            /* Copy from SRCP to DSTP taking advantage of the known
               alignment of DSTP.  Number of bytes remaining is put
               in the third argument, i.e. in LEN.  This number may
               vary from machine to machine.  */
            WORD_COPY_BWD (dstp, srcp, len, len);

            /* Fall out and copy the tail.  */
        }

        /* There are just a few bytes to copy.  Use byte memory operations.  */
        BYTE_COPY_BWD (dstp, srcp, len);
    }

    return destpp;
}
Exemple #4
0
void *memcpyb(void *dstpp, const void *srcpp, unsigned len)
{
	unsigned long int dstp = (long int) dstpp;
	unsigned long int srcp = (long int) srcpp;

	BYTE_COPY_FWD(dstp, srcp, len);

	return dstpp;
}
Exemple #5
0
void *memmove (void *dest, const void *src, size_t len)
{
  unsigned long int dstp = (long int) dest;
  unsigned long int srcp = (long int) src;

  /* This test makes the forward copying code be used whenever possible.
     Reduces the working set.  */
  if (dstp - srcp >= len)	/* *Unsigned* compare!  */
    {
#ifndef __ARCH_HAS_BWD_MEMCPY__
      /* Backward memcpy implementation cannot be used */
      memcpy(dest, src, len);
#else
      /* Copy from the beginning to the end.  */

      /* If there not too few bytes to copy, use word copy.  */
      if (len >= OP_T_THRES)
	{
	  /* Copy just a few bytes to make DSTP aligned.  */
	  len -= (-dstp) % OPSIZ;
	  BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);

	  /* Copy whole pages from SRCP to DSTP by virtual address
	     manipulation, as much as possible.  */

	  PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);

	  /* Copy from SRCP to DSTP taking advantage of the known
	     alignment of DSTP.  Number of bytes remaining is put
	     in the third argument, i.e. in LEN.  This number may
	     vary from machine to machine.  */

	  WORD_COPY_FWD (dstp, srcp, len, len);

	  /* Fall out and copy the tail.  */
	}

      /* There are just a few bytes to copy.  Use byte memory operations.  */
      BYTE_COPY_FWD (dstp, srcp, len);
#endif
    }
  else
    {
      /* Copy from the end to the beginning.  */
      srcp += len;
      dstp += len;

      /* If there not too few bytes to copy, use word copy.  */
      if (len >= OP_T_THRES)
	{
	  /* Copy just a few bytes to make DSTP aligned.  */
	  len -= dstp % OPSIZ;
	  BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);

	  /* Copy from SRCP to DSTP taking advantage of the known
	     alignment of DSTP.  Number of bytes remaining is put
	     in the third argument, i.e. in LEN.  This number may
	     vary from machine to machine.  */

	  WORD_COPY_BWD (dstp, srcp, len, len);

	  /* Fall out and copy the tail.  */
	}

      /* There are just a few bytes to copy.  Use byte memory operations.  */
      BYTE_COPY_BWD (dstp, srcp, len);
    }

  return (dest);
}
Exemple #6
0
rettype
inhibit_loop_to_libcall
MEMMOVE (a1const void *a1, a2const void *a2, size_t len)
{
  unsigned long int dstp = (long int) dest;
  unsigned long int srcp = (long int) src;

  /* This test makes the forward copying code be used whenever possible.
     Reduces the working set.  */
  if (dstp - srcp >= len)	/* *Unsigned* compare!  */
    {
      /* Copy from the beginning to the end.  */

#if MEMCPY_OK_FOR_FWD_MEMMOVE
      dest = memcpy (dest, src, len);
#else
      /* If there not too few bytes to copy, use word copy.  */
      if (len >= OP_T_THRES)
	{
	  /* Copy just a few bytes to make DSTP aligned.  */
	  len -= (-dstp) % OPSIZ;
	  BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);

	  /* Copy whole pages from SRCP to DSTP by virtual address
	     manipulation, as much as possible.  */

	  PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);

	  /* Copy from SRCP to DSTP taking advantage of the known
	     alignment of DSTP.  Number of bytes remaining is put
	     in the third argument, i.e. in LEN.  This number may
	     vary from machine to machine.  */

	  WORD_COPY_FWD (dstp, srcp, len, len);

	  /* Fall out and copy the tail.  */
	}

      /* There are just a few bytes to copy.  Use byte memory operations.  */
      BYTE_COPY_FWD (dstp, srcp, len);
#endif /* MEMCPY_OK_FOR_FWD_MEMMOVE */
    }
  else
    {
      /* Copy from the end to the beginning.  */
      srcp += len;
      dstp += len;

      /* If there not too few bytes to copy, use word copy.  */
      if (len >= OP_T_THRES)
	{
	  /* Copy just a few bytes to make DSTP aligned.  */
	  len -= dstp % OPSIZ;
	  BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);

	  /* Copy from SRCP to DSTP taking advantage of the known
	     alignment of DSTP.  Number of bytes remaining is put
	     in the third argument, i.e. in LEN.  This number may
	     vary from machine to machine.  */

	  WORD_COPY_BWD (dstp, srcp, len, len);

	  /* Fall out and copy the tail.  */
	}

      /* There are just a few bytes to copy.  Use byte memory operations.  */
      BYTE_COPY_BWD (dstp, srcp, len);
    }

  RETURN (dest);
}