Add types and accessors for working with half-aligned 64-bit values.

[sliver-openvswitch.git] / lib / unaligned.h

diff --git a/lib/unaligned.h b/lib/unaligned.h
index ef08f4e..a44ee8b 100644 (file)
--- a/lib/unaligned.h
+++ b/lib/unaligned.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Nicira Networks.
+ * Copyright (c) 2010, 2011 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -140,5 +140,44 @@ static inline void put_unaligned_u64(uint64_t *p_, uint64_t x_)
 #define put_unaligned_be32 put_unaligned_u32
 #define put_unaligned_be64 put_unaligned_u64
 #endif
+\f
+/* Returns the value in 'x'. */
+static inline uint64_t
+get_32aligned_u64(const ovs_32aligned_u64 *x)
+{
+       return ((uint64_t) x->hi << 32) | x->lo;
+}
+
+/* Stores 'value' in 'x'. */
+static inline void
+put_32aligned_u64(ovs_32aligned_u64 *x, uint64_t value)
+{
+       x->hi = value >> 32;
+       x->lo = value;
+}
+
+/* Returns the value of 'x'. */
+static inline ovs_be64
+get_32aligned_be64(const ovs_32aligned_be64 *x)
+{
+#ifdef WORDS_BIGENDIAN
+       return ((ovs_be64) x->hi << 32) | x->lo;
+#else
+       return ((ovs_be64) x->lo << 32) | x->hi;
+#endif
+}
+
+/* Stores network byte order 'value' into 'x'. */
+static inline void
+put_32aligned_be64(ovs_32aligned_be64 *x, ovs_be64 value)
+{
+#if WORDS_BIGENDIAN
+       x->hi = value >> 32;
+       x->lo = value;
+#else
+    x->hi = value;
+    x->lo = value >> 32;
+#endif
+}
 
 #endif /* unaligned.h */