Cleanup: Re-organise source dir

[userspace-rcu.git] / include / urcu / uatomic / sparc64.h

diff --git a/include/urcu/uatomic/sparc64.h b/include/urcu/uatomic/sparc64.h
new file mode 100644 (file)
index 0000000..a9f2795
--- /dev/null
+++ b/include/urcu/uatomic/sparc64.h
@@ -0,0 +1,81 @@
+#ifndef _URCU_ARCH_UATOMIC_SPARC64_H
+#define _URCU_ARCH_UATOMIC_SPARC64_H
+
+/*
+ * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
+ * Copyright (c) 1996-1999 by Silicon Graphics.  All rights reserved.
+ * Copyright (c) 1999-2003 by Hewlett-Packard Company. All rights reserved.
+ * Copyright (c) 2009      Mathieu Desnoyers
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Code inspired from libuatomic_ops-1.2, inherited in part from the
+ * Boehm-Demers-Weiser conservative garbage collector.
+ */
+
+#include <urcu/compiler.h>
+#include <urcu/system.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* cmpxchg */
+
+static inline __attribute__((always_inline))
+unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
+                             unsigned long _new, int len)
+{
+       switch (len) {
+       case 4:
+       {
+               __asm__ __volatile__ (
+                       "membar #StoreLoad | #LoadLoad\n\t"
+                        "cas [%1],%2,%0\n\t"
+                        "membar #StoreLoad | #StoreStore\n\t"
+                        : "+&r" (_new)
+                        : "r" (addr), "r" (old)
+                        : "memory");
+
+               return _new;
+       }
+#if (CAA_BITS_PER_LONG == 64)
+       case 8:
+       {
+               __asm__ __volatile__ (
+                       "membar #StoreLoad | #LoadLoad\n\t"
+                        "casx [%1],%2,%0\n\t"
+                        "membar #StoreLoad | #StoreStore\n\t"
+                        : "+&r" (_new)
+                        : "r" (addr), "r" (old)
+                        : "memory");
+
+               return _new;
+       }
+#endif
+       }
+       __builtin_trap();
+       return 0;
+}
+
+
+#define uatomic_cmpxchg(addr, old, _new)                                      \
+       ((__typeof__(*(addr))) _uatomic_cmpxchg((addr),                        \
+                                               caa_cast_long_keep_sign(old),  \
+                                               caa_cast_long_keep_sign(_new), \
+                                               sizeof(*(addr))))
+
+#ifdef __cplusplus
+}
+#endif
+
+#include <urcu/uatomic/generic.h>
+
+#endif /* _URCU_ARCH_UATOMIC_PPC_H */