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#ifndef CYGONCE_HAL_HAL_ENDIAN_H

#define CYGONCE_HAL_HAL_ENDIAN_H

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

//

//      hal_endian.h

//

//      Endian conversion macros

//

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

//####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.

//

// This exception does not invalidate any other reasons why a work based on

// 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####

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

//#####DESCRIPTIONBEGIN####

//

// Author(s):   jskov

// Contributors:jskov

// Date:        2001-10-04

// Purpose:     Endian conversion macros

// Usage:       #include <cyg/hal/hal_endian.h>

//                           

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>                // CYGBLD_HAL_ENDIAN_H

#include <cyg/infra/cyg_type.h>         // endian setting

// Allow HALs to override the generic implementation of swap macros

#ifdef CYGBLD_HAL_ENDIAN_H

# include CYGBLD_HAL_ENDIAN_H

#endif

#ifndef CYG_SWAP16

# define CYG_SWAP16(_x_)                                        \

    ({ cyg_uint16 _x = (_x_); ((_x << 8) | (_x >> 8)); })

#endif

#ifndef CYG_SWAP32

# define CYG_SWAP32(_x_)                        \

    ({ cyg_uint32 _x = (_x_);                   \

       ((_x << 24) |                            \

       ((0x0000FF00UL & _x) <<  8) |            \

       ((0x00FF0000UL & _x) >>  8) |            \

       (_x  >> 24)); })

#endif

#if (CYG_BYTEORDER == CYG_LSBFIRST)

# define CYG_CPU_TO_BE16(_x_) CYG_SWAP16((_x_))

# define CYG_CPU_TO_BE32(_x_) CYG_SWAP32((_x_))

# define CYG_BE16_TO_CPU(_x_) CYG_SWAP16((_x_))

# define CYG_BE32_TO_CPU(_x_) CYG_SWAP32((_x_))

# define CYG_CPU_TO_LE16(_x_) (_x_)

# define CYG_CPU_TO_LE32(_x_) (_x_)

# define CYG_LE16_TO_CPU(_x_) (_x_)

# define CYG_LE32_TO_CPU(_x_) (_x_)

#elif (CYG_BYTEORDER == CYG_MSBFIRST)

# define CYG_CPU_TO_BE16(_x_) (_x_)

# define CYG_CPU_TO_BE32(_x_) (_x_)

# define CYG_BE16_TO_CPU(_x_) (_x_)

# define CYG_BE32_TO_CPU(_x_) (_x_)

# define CYG_CPU_TO_LE16(_x_) CYG_SWAP16((_x_))

# define CYG_CPU_TO_LE32(_x_) CYG_SWAP32((_x_))

# define CYG_LE16_TO_CPU(_x_) CYG_SWAP16((_x_))

# define CYG_LE32_TO_CPU(_x_) CYG_SWAP32((_x_))

#else

# error "Endian mode not selected"

#endif

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

#endif // CYGONCE_HAL_HAL_ENDIAN_H

// End of hal_endian.h