atomics: add atomic_xor
This paves the way for upcoming work. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-Id: <1467054136-10430-8-git-send-email-cota@braap.org>
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@ -173,6 +173,7 @@
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#define atomic_fetch_sub(ptr, n) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST)
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#define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST)
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#define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST)
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#define atomic_fetch_xor(ptr, n) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST)
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/* And even shorter names that return void. */
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#define atomic_inc(ptr) ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST))
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@ -181,6 +182,7 @@
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#define atomic_sub(ptr, n) ((void) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST))
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#define atomic_and(ptr, n) ((void) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST))
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#define atomic_or(ptr, n) ((void) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST))
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#define atomic_xor(ptr, n) ((void) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST))
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#else /* __ATOMIC_RELAXED */
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@ -339,6 +341,7 @@
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#define atomic_fetch_sub(ptr, n) __sync_fetch_and_sub(ptr, n)
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#define atomic_fetch_and(ptr, n) __sync_fetch_and_and(ptr, n)
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#define atomic_fetch_or(ptr, n) __sync_fetch_and_or(ptr, n)
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#define atomic_fetch_xor(ptr, n) __sync_fetch_and_xor(ptr, n)
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#define atomic_cmpxchg(ptr, old, new) __sync_val_compare_and_swap(ptr, old, new)
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/* And even shorter names that return void. */
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@ -348,6 +351,7 @@
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#define atomic_sub(ptr, n) ((void) __sync_fetch_and_sub(ptr, n))
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#define atomic_and(ptr, n) ((void) __sync_fetch_and_and(ptr, n))
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#define atomic_or(ptr, n) ((void) __sync_fetch_and_or(ptr, n))
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#define atomic_xor(ptr, n) ((void) __sync_fetch_and_xor(ptr, n))
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#endif /* __ATOMIC_RELAXED */
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