Initial version

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/or1k/atomic_arch.h b/arch/or1k/atomic_arch.h
new file mode 100644
index 0000000..11a5429
--- /dev/null
+++ b/arch/or1k/atomic_arch.h
@@ -0,0 +1,14 @@
+#define a_cas a_cas
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	__asm__("1:	l.lwa %0, %1\n"
+		"	l.sfeq %0, %2\n"
+		"	l.bnf 1f\n"
+		"	 l.nop\n"
+		"	l.swa %1, %3\n"
+		"	l.bnf 1b\n"
+		"	 l.nop\n"
+		"1:	\n"
+		: "=&r"(t), "+m"(*p) : "r"(t), "r"(s) : "cc", "memory" );
+        return t;
+}