#ifndef _ASM_IA64_INTRINSICS_H
#define _ASM_IA64_INTRINSICS_H
/*
* Compiler-dependent intrinsics.
*
* Copyright (C) 2002-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#ifndef __ASSEMBLY__
/* include compiler specific intrinsics */
#include <asm/ia64regs.h>
#ifdef __INTEL_COMPILER
# include <asm/intel_intrin.h>
#else
# include <asm/gcc_intrin.h>
#endif
/*
* Force an unresolved reference if someone tries to use
* ia64_fetch_and_add() with a bad value.
*/
extern unsigned long __bad_size_for_ia64_fetch_and_add (void);
extern unsigned long __bad_increment_for_ia64_fetch_and_add (void);
#define IA64_FETCHADD(tmp,v,n,sz,sem) \
({ \
switch (sz) { \
case 4: \
tmp = ia64_fetchadd4_##sem((unsigned int *) v, n); \
break; \
\
case 8: \
tmp = ia64_fetchadd8_##sem((unsigned long *) v, n); \
break; \
\
default: \
__bad_size_for_ia64_fetch_and_add(); \
} \
})
#define ia64_fetchadd(i,v,sem) \
({ \
__u64 _tmp; \
volatile __typeof__(*(v)) *_v = (v); \
/* Can't use a switch () here: gcc isn't always smart enough for that... */ \
if ((i) == -16) \
IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v)), sem); \
else if ((i) == -8) \
IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem); \
else if ((i) == -4) \
IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem); \
else if ((i) == -1) \
IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem); \
else if ((i) == 1) \
IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem); \
else if ((i) == 4) \
IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem); \
else if ((i) == 8) \
IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem); \
else if ((i) == 16) \
IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem); \
else \
_tmp = __bad_increment_for_ia64_fetch_and_add(); \
(__typeof__(*(v))) (_tmp); /* return old value */ \
})
#define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (i)) /* return new value */
/*
* This function doesn't exist, so you'll get a linker error if
* something tries to do an invalid xchg().
*/
extern void ia64_xchg_called_with_bad_pointer (void);
#define __xchg(x,ptr,size) \
({ \
unsigned long __xchg_result; \
\
switch (size) { \
case 1: \
__xchg_result = ia64_xchg1((__u8 *)ptr, x); \
break; \
\
case 2: \
__xchg_result = ia64_xchg2((__u16 *)ptr, x); \
break; \
\
case 4: \
__xchg_result = ia64_xchg4((__u32 *)ptr, x); \
break; \
\
case 8: \
__xchg_result = ia64_xchg8((__u64 *)ptr, x); \
break; \
default: \
ia64_xchg_called_with_bad_pointer(); \
} \
__xchg_result; \
})
#define xchg(ptr,x) \
((__typeof__(*(ptr))) __xchg ((unsigned long) (x), (ptr), sizeof(*(ptr))))
/*
* Atomic compare and exchange. Compare OLD with MEM, if identical,
* store NEW in MEM. Return the initial value in MEM. Success is
* indicated by comparing RETURN with OLD.
*/
#define __HAVE_ARCH_CMPXCHG 1
/*
* This function doesn't exist, so you'll get a linker error
* if something tries to do an invalid cmpxchg().
*/
extern long ia64_cmpxchg_called_with_bad_pointer (void);
#define ia64_cmpxchg(sem,ptr,old,new,size) \
({ \
__u64 _o_, _r_; \
\
switch (size) { \
case 1: _o_ = (__u8 ) (long) (old); break; \
case 2: _o_ = (__u16) (long) (old); break; \
case 4: _o_ = (__u32) (long) (old); break; \
case 8: _o_ = (__u64) (long) (old); break; \
default: break; \
} \
switch (size) { \
case 1: \
_r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \
break; \
\
case 2: \
_r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \
break; \
\
case 4: \
_r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \
break; \
\
case 8: \
_r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \
break; \
\
default: \
_r_ = ia64_cmpxchg_called_with_bad_pointer(); \
break; \
} \
(__typeof__(old)) _r_; \
})
#define cmpxchg_acq(ptr,o,n) ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
#define cmpxchg_rel(ptr,o,n) ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
/* for compatibility with other platforms: */
#define cmpxchg(ptr,o,n) cmpxchg_acq(ptr,o,n)
#ifdef CONFIG_IA64_DEBUG_CMPXCHG
# define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
# define CMPXCHG_BUGCHECK(v) \
do { \
if (_cmpxchg_bugcheck_count-- <= 0) { \
void *ip; \
extern int printk(const char *fmt, ...); \
ip = (void *) ia64_getreg(_IA64_REG_IP); \
printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v)); \
break; \
} \
} while (0)
#else /* !CONFIG_IA64_DEBUG_CMPXCHG */
# define CMPXCHG_BUGCHECK_DECL
# define CMPXCHG_BUGCHECK(v)
#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
#endif
#endif /* _ASM_IA64_INTRINSICS_H */
