swh:1:snp:77163734605b0ec556b01d897b7bb4a7e30d46b6
unaligned.h
#ifndef _ASM_IA64_UNALIGNED_H
#define _ASM_IA64_UNALIGNED_H
#include <linux/types.h>
/*
* The main single-value unaligned transfer routines.
*
* Based on <asm-alpha/unaligned.h>.
*
* Copyright (C) 1998, 1999, 2003 Hewlett-Packard Co
* 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)))
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
__uld8 (const unsigned long * addr)
{
const struct __una_u64 *ptr = (const struct __una_u64 *) addr;
return ptr->x;
}
static inline unsigned long
__uld4 (const unsigned int * addr)
{
const struct __una_u32 *ptr = (const struct __una_u32 *) addr;
return ptr->x;
}
static inline unsigned long
__uld2 (const unsigned short * addr)
{
const struct __una_u16 *ptr = (const struct __una_u16 *) addr;
return ptr->x;
}
static inline void
__ust8 (unsigned long val, unsigned long * addr)
{
struct __una_u64 *ptr = (struct __una_u64 *) addr;
ptr->x = val;
}
static inline void
__ust4 (unsigned long val, unsigned int * addr)
{
struct __una_u32 *ptr = (struct __una_u32 *) addr;
ptr->x = val;
}
static inline void
__ust2 (unsigned long val, unsigned short * addr)
{
struct __una_u16 *ptr = (struct __una_u16 *) addr;
ptr->x = val;
}
/*
* 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 *__ia64_ptr = (_ptr); \
unsigned long __ia64_val; \
\
switch (size) { \
case 1: \
__ia64_val = *(const unsigned char *) __ia64_ptr; \
break; \
case 2: \
__ia64_val = __uld2((const unsigned short *)__ia64_ptr); \
break; \
case 4: \
__ia64_val = __uld4((const unsigned int *)__ia64_ptr); \
break; \
case 8: \
__ia64_val = __uld8((const unsigned long *)__ia64_ptr); \
break; \
default: \
__ia64_val = ia64_bad_unaligned_access_length(); \
} \
__ia64_val; \
})
#define ia64_put_unaligned(_val,_ptr,size) \
do { \
const void *__ia64_ptr = (_ptr); \
unsigned long __ia64_val = (_val); \
\
switch (size) { \
case 1: \
*(unsigned char *)__ia64_ptr = (__ia64_val); \
break; \
case 2: \
__ust2(__ia64_val, (unsigned short *)__ia64_ptr); \
break; \
case 4: \
__ust4(__ia64_val, (unsigned int *)__ia64_ptr); \
break; \
case 8: \
__ust8(__ia64_val, (unsigned long *)__ia64_ptr); \
break; \
default: \
ia64_bad_unaligned_access_length(); \
} \
} while (0)
#endif /* _ASM_IA64_UNALIGNED_H */