https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105011
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Even better:
...
diff --git a/libatomic/tas_n.c b/libatomic/tas_n.c
index d0d8c283b495..65eaa7753a51 100644
--- a/libatomic/tas_n.c
+++ b/libatomic/tas_n.c
@@ -73,7 +73,7 @@ SIZE(libat_test_and_set) (UTYPE *mptr, int smodel)
__ATOMIC_RELAXED, __ATOMIC_RELAXED));
post_barrier (smodel);
- return woldval != 0;
+ return (woldval & wval) == wval;
}
#define DONE 1
...
That also gives back accurate results in case
TARGET_ATOMIC_TEST_AND_SET_TRUEVAL has more than one bit set.
