From 102a53aa50ab91209ea160ceb28bc291d053c2d0 Mon Sep 17 00:00:00 2001 From: "Emilio G. Cota" Date: Tue, 27 Feb 2018 10:23:08 -0500 Subject: [PATCH] atomics: add atomic_xor This paves the way for upcoming work. Backports commit 61696ddbdc74263ddb6869856772cfe355a5d3bd from qemu --- qemu/include/qemu/atomic.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/qemu/include/qemu/atomic.h b/qemu/include/qemu/atomic.h index bc143f89..b18548ed 100644 --- a/qemu/include/qemu/atomic.h +++ b/qemu/include/qemu/atomic.h @@ -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 */