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/* $Id$
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1996, 1999 by Ralf Baechle
*/
#ifndef _ASM_UNALIGNED_H
#define _ASM_UNALIGNED_H
extern void __get_unaligned_bad_length(void);
extern void __put_unaligned_bad_length(void);
/*
* Load quad unaligned.
*/
extern __inline__ unsigned long ldq_u(const unsigned long long * __addr)
{
unsigned long long __res;
__asm__("uld\t%0,(%1)"
:"=&r" (__res)
:"r" (__addr));
return __res;
}
/*
* Load long unaligned.
*/
extern __inline__ unsigned long ldl_u(const unsigned int * __addr)
{
unsigned long __res;
__asm__("ulw\t%0,(%1)"
:"=&r" (__res)
:"r" (__addr));
return __res;
}
/*
* Load word unaligned.
*/
extern __inline__ unsigned long ldw_u(const unsigned short * __addr)
{
unsigned long __res;
__asm__("ulh\t%0,(%1)"
:"=&r" (__res)
:"r" (__addr));
return __res;
}
/*
* Store quad ununaligned.
*/
extern __inline__ void stq_u(unsigned long __val, unsigned long long * __addr)
{
__asm__ __volatile__(
"usd\t%0,(%1)"
: /* No results */
:"r" (__val),
"r" (__addr));
}
/*
* Store long ununaligned.
*/
extern __inline__ void stl_u(unsigned long __val, unsigned int * __addr)
{
__asm__ __volatile__(
"usw\t%0,(%1)"
: /* No results */
:"r" (__val),
"r" (__addr));
}
/*
* Store word ununaligned.
*/
extern __inline__ void stw_u(unsigned long __val, unsigned short * __addr)
{
__asm__ __volatile__(
"ush\t%0,(%1)"
: /* No results */
:"r" (__val),
"r" (__addr));
}
extern inline unsigned long __get_unaligned(const void *ptr, size_t size)
{
unsigned long val;
switch (size) {
case 1:
val = *(const unsigned char *)ptr;
break;
case 2:
val = ldw_u((const unsigned short *)ptr);
break;
case 4:
val = ldl_u((const unsigned int *)ptr);
break;
case 8:
val = ldq_u((const unsigned long long *)ptr);
break;
default:
__get_unaligned_bad_length();
break;
}
return val;
}
extern inline void __put_unaligned(unsigned long val, void *ptr, size_t size)
{
switch (size) {
case 1:
*(unsigned char *)ptr = (val);
break;
case 2:
stw_u(val, (unsigned short *)ptr);
break;
case 4:
stl_u(val, (unsigned int *)ptr);
break;
case 8:
stq_u(val, (unsigned long long *)ptr);
break;
default:
__put_unaligned_bad_length();
break;
}
}
/*
* The main single-value unaligned transfer routines.
*/
#define get_unaligned(ptr) \
((__typeof__(*(ptr)))__get_unaligned((ptr), sizeof(*(ptr))))
#define put_unaligned(x,ptr) \
__put_unaligned((unsigned long)(x), (ptr), sizeof(*(ptr)))
#endif /* _ASM_UNALIGNED_H */
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