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atomics: add atomic_xor

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This paves the way for upcoming work.

Backports commit 61696ddbdc74263ddb6869856772cfe355a5d3bd from qemu
This commit is contained in:
Emilio G. Cota 2018-02-27 10:23:08 -05:00 committed by Lioncash
parent 3fe8d46a15
commit 102a53aa50
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1 changed files with 4 additions and 0 deletions
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4
qemu/include/qemu/atomic.h
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@ -136,6 +136,7 @@ void _ReadWriteBarrier(void);
#define atomic_fetch_sub(ptr, n) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST)
#define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST)
#define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST)
#define atomic_fetch_xor(ptr, n) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST)
/* And even shorter names that return void. */
#define atomic_inc(ptr) ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST))
@ -144,6 +145,7 @@ void _ReadWriteBarrier(void);
#define atomic_sub(ptr, n) ((void) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST))
#define atomic_and(ptr, n) ((void) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST))
#define atomic_or(ptr, n) ((void) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST))
#define atomic_xor(ptr, n) ((void) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST))
#else /* __ATOMIC_RELAXED */
@ -320,6 +322,7 @@ void _ReadWriteBarrier(void);
#define atomic_fetch_sub(ptr, n) __sync_fetch_and_sub(ptr, n)
#define atomic_fetch_and(ptr, n) __sync_fetch_and_and(ptr, n)
#define atomic_fetch_or(ptr, n) __sync_fetch_and_or(ptr, n)
#define atomic_fetch_xor(ptr, n) __sync_fetch_and_xor(ptr, n)
#define atomic_cmpxchg(ptr, old, new) __sync_val_compare_and_swap(ptr, old, new)
#endif
@ -336,6 +339,7 @@ void _ReadWriteBarrier(void);
#define atomic_sub(ptr, n) ((void) __sync_fetch_and_sub(ptr, n))
#define atomic_and(ptr, n) ((void) __sync_fetch_and_and(ptr, n))
#define atomic_or(ptr, n) ((void) __sync_fetch_and_or(ptr, n))
#define atomic_xor(ptr, n) ((void) __sync_fetch_and_xor(ptr, n))
#endif
#endif /* __ATOMIC_RELAXED */