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//==========================================================================

//

//      memcpy.c

//

//      memcpy() routine for coldfire

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos 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 General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

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// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

/* INCLUDES */

#include <cyg/infra/cyg_type.h> /* Common type definitions */

#include <stddef.h>             /* Compiler defns such as size_t, NULL etc. */

/* EXPORTED SYMBOLS */

externC void *

memcpy( void * s1, const void * s2, size_t n ) __attribute__((alias("_memcpy")));

/* FUNCTIONS */

void *

_memcpy( void * s1, const void * s2, size_t n )

{

    char * dst = (char *) s1;

    const char * src = (const char *) s2;

    long longwords;

    int_t rem_bytes;

    int_t loops;

    int_t loop_index;

    /*   Don't  worry  about  alignment   on  the  coldfire.   Most   large */

    /* structures should be aligned anyway.                                 */

    longwords  = (long)(n / 4);

    rem_bytes  = n % 4;

    loops      = (int_t)(longwords / 32);

    loop_index = (int_t)(longwords % 32);

    switch (loop_index)

    {

        do

        {

                   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 31:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 30:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 29:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 28:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 27:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 26:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 25:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 24:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 23:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 22:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 21:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 20:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 19:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 18:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 17:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 16:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 15:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 14:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 13:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 12:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 11:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 10:   *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 9:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 8:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 7:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 6:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 5:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 4:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 3:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 2:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 1:    *((cyg_uint32*)dst)++ = *((cyg_uint32*)src)++;

        case 0:    ; /* Keep compiler from complaining. */

        } while (--loops >= 0);

    }

    /* Clean up the remaining bytes. */

    while (--rem_bytes >= 0)

    {

        *dst++ = *src++;

    }

    return s1;

} /* _memcpy() */

/* EOF memcpy.c */