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/*
* byteorder.h
*
* This file contains inline implementation of function to
* deal with endian conversion.
*
* It is a stripped down version of linux ppc file...
*
* Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
* Canon Centre Recherche France.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#ifndef _LIBCPU_BYTEORDER_H
#define _LIBCPU_BYTEORDER_H
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __GNUC__
extern __inline__ unsigned ld_le16(volatile uint16_t *addr)
{
unsigned val;
__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
return val;
}
extern __inline__ void st_le16(volatile uint16_t *addr, unsigned val)
{
__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
}
extern __inline__ unsigned ld_le32(volatile uint32_t *addr)
{
unsigned val;
__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
return val;
}
extern __inline__ void st_le32(volatile uint32_t *addr, unsigned val)
{
__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
}
#endif /* __GNUC__ */
#ifdef __cplusplus
}
#endif
#endif /* _LIBCPU_BYTEORDER_H */
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