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#ifndef _ASM_X86_CMPXCHG_64_H
#define _ASM_X86_CMPXCHG_64_H
static inline void set_64bit(volatile u64 *ptr, u64 val)
{
*ptr = val;
}
#define __HAVE_ARCH_CMPXCHG 1
#define cmpxchg64(ptr, o, n) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
cmpxchg((ptr), (o), (n)); \
})
#define cmpxchg64_local(ptr, o, n) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
cmpxchg_local((ptr), (o), (n)); \
})
#define cmpxchg16b(ptr, o1, o2, n1, n2) \
({ \
char __ret; \
__typeof__(o2) __junk; \
__typeof__(*(ptr)) __old1 = (o1); \
__typeof__(o2) __old2 = (o2); \
__typeof__(*(ptr)) __new1 = (n1); \
__typeof__(o2) __new2 = (n2); \
asm volatile(LOCK_PREFIX "cmpxchg16b %2;setz %1" \
: "=d"(__junk), "=a"(__ret), "+m" (*ptr) \
: "b"(__new1), "c"(__new2), \
"a"(__old1), "d"(__old2)); \
__ret; })
#define cmpxchg16b_local(ptr, o1, o2, n1, n2) \
({ \
char __ret; \
__typeof__(o2) __junk; \
__typeof__(*(ptr)) __old1 = (o1); \
__typeof__(o2) __old2 = (o2); \
__typeof__(*(ptr)) __new1 = (n1); \
__typeof__(o2) __new2 = (n2); \
asm volatile("cmpxchg16b %2;setz %1" \
: "=d"(__junk), "=a"(__ret), "+m" (*ptr) \
: "b"(__new1), "c"(__new2), \
"a"(__old1), "d"(__old2)); \
__ret; })
#define cmpxchg_double(ptr, o1, o2, n1, n2) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
VM_BUG_ON((unsigned long)(ptr) % 16); \
cmpxchg16b((ptr), (o1), (o2), (n1), (n2)); \
})
#define cmpxchg_double_local(ptr, o1, o2, n1, n2) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
VM_BUG_ON((unsigned long)(ptr) % 16); \
cmpxchg16b_local((ptr), (o1), (o2), (n1), (n2)); \
})
#define system_has_cmpxchg_double() cpu_has_cx16
#endif /* _ASM_X86_CMPXCHG_64_H */
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