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#ifndef _ASM_IA64_UNALIGNED_H
#define _ASM_IA64_UNALIGNED_H
/*
* The main single-value unaligned transfer routines. Derived from
* the Linux/Alpha version.
*
* Copyright (C) 1998, 1999 Hewlett-Packard Co
* Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com>
*/
#define get_unaligned(ptr) \
((__typeof__(*(ptr)))ia64_get_unaligned((ptr), sizeof(*(ptr))))
#define put_unaligned(x,ptr) \
ia64_put_unaligned((unsigned long)(x), (ptr), sizeof(*(ptr)))
/*
* EGCS 1.1 knows about arbitrary unaligned loads. Define some
* packed structures to talk about such things with.
*/
struct __una_u64 { __u64 x __attribute__((packed)); };
struct __una_u32 { __u32 x __attribute__((packed)); };
struct __una_u16 { __u16 x __attribute__((packed)); };
static inline unsigned long
__uldq (const unsigned long * r11)
{
const struct __una_u64 *ptr = (const struct __una_u64 *) r11;
return ptr->x;
}
static inline unsigned long
__uldl (const unsigned int * r11)
{
const struct __una_u32 *ptr = (const struct __una_u32 *) r11;
return ptr->x;
}
static inline unsigned long
__uldw (const unsigned short * r11)
{
const struct __una_u16 *ptr = (const struct __una_u16 *) r11;
return ptr->x;
}
static inline void
__ustq (unsigned long r5, unsigned long * r11)
{
struct __una_u64 *ptr = (struct __una_u64 *) r11;
ptr->x = r5;
}
static inline void
__ustl (unsigned long r5, unsigned int * r11)
{
struct __una_u32 *ptr = (struct __una_u32 *) r11;
ptr->x = r5;
}
static inline void
__ustw (unsigned long r5, unsigned short * r11)
{
struct __una_u16 *ptr = (struct __una_u16 *) r11;
ptr->x = r5;
}
/*
* This function doesn't actually exist. The idea is that when
* someone uses the macros below with an unsupported size (datatype),
* the linker will alert us to the problem via an unresolved reference
* error.
*/
extern unsigned long ia64_bad_unaligned_access_length (void);
#define ia64_get_unaligned(_ptr,size) \
({ \
const void *ptr = (_ptr); \
unsigned long val; \
\
switch (size) { \
case 1: \
val = *(const unsigned char *) ptr; \
break; \
case 2: \
val = __uldw((const unsigned short *)ptr); \
break; \
case 4: \
val = __uldl((const unsigned int *)ptr); \
break; \
case 8: \
val = __uldq((const unsigned long *)ptr); \
break; \
default: \
val = ia64_bad_unaligned_access_length(); \
} \
val; \
})
#define ia64_put_unaligned(_val,_ptr,size) \
do { \
const void *ptr = (_ptr); \
unsigned long val = (_val); \
\
switch (size) { \
case 1: \
*(unsigned char *)ptr = (val); \
break; \
case 2: \
__ustw(val, (unsigned short *)ptr); \
break; \
case 4: \
__ustl(val, (unsigned int *)ptr); \
break; \
case 8: \
__ustq(val, (unsigned long *)ptr); \
break; \
default: \
ia64_bad_unaligned_access_length(); \
} \
} while (0)
#endif /* _ASM_IA64_UNALIGNED_H */
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