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#ifndef CYGONCE_HAL_HAL_ENDIAN_H
#define CYGONCE_HAL_HAL_ENDIAN_H
 
//=============================================================================
//
//      hal_endian.h
//
//      Endian conversion macros
//
//=============================================================================
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// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
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// version.                                                                 
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// for more details.                                                        
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//
// As a special exception, if other files instantiate templates or use      
// macros or inline functions from this file, or you compile this file      
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// General Public License v2.                                               
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// ####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_); (cyg_uint16)((_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