Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
docs/devel/atomics.txt | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/docs/devel/atomics.txt b/docs/devel/atomics.txt
index 3ef5d85..048e5f2 100644
--- a/docs/devel/atomics.txt
+++ b/docs/devel/atomics.txt
@@ -63,11 +63,22 @@ operations:
typeof(*ptr) atomic_fetch_sub(ptr, val)
typeof(*ptr) atomic_fetch_and(ptr, val)
typeof(*ptr) atomic_fetch_or(ptr, val)
+ typeof(*ptr) atomic_fetch_xor(ptr, val)
typeof(*ptr) atomic_xchg(ptr, val)
typeof(*ptr) atomic_cmpxchg(ptr, old, new)
all of which return the old value of *ptr. These operations are
-polymorphic; they operate on any type that is as wide as an int.
+polymorphic; they operate on any type that is as wide as a pointer.
+
+Similar operations return the new value of *ptr:
+
+ typeof(*ptr) atomic_inc_fetch(ptr)
+ typeof(*ptr) atomic_dec_fetch(ptr)
+ typeof(*ptr) atomic_add_fetch(ptr, val)
+ typeof(*ptr) atomic_sub_fetch(ptr, val)
+ typeof(*ptr) atomic_and_fetch(ptr, val)
+ typeof(*ptr) atomic_or_fetch(ptr, val)
+ typeof(*ptr) atomic_xor_fetch(ptr, val)
Sequentially consistent loads and stores can be done using:
--
1.8.3.1
