1 files changed, 27 insertions, 0 deletions
diff --git a/gpxe/src/include/gpxe/rotate.h b/gpxe/src/include/gpxe/rotate.h
new file mode 100644
index 00000000..42ec7196
--- /dev/null
+++ b/gpxe/src/include/gpxe/rotate.h
@@ -0,0 +1,27 @@
+#ifndef _GPXE_ROTATE_H
+#define _GPXE_ROTATE_H
+
+/** @file
+ *
+ * Bit operations
+ */
+
+#include <stdint.h>
+
+static inline uint32_t rol32 ( uint32_t data, unsigned int rotation ) {
+        return ( ( data << rotation ) | ( data >> ( 32 - rotation ) ) );
+}
+
+static inline uint32_t ror32 ( uint32_t data, unsigned int rotation ) {
+        return ( ( data >> rotation ) | ( data << ( 32 - rotation ) ) );
+}
+
+static inline uint64_t rol64 ( uint64_t data, unsigned int rotation ) {
+        return ( ( data << rotation ) | ( data >> ( 64 - rotation ) ) );
+}
+
+static inline uint64_t ror64 ( uint64_t data, unsigned int rotation ) {
+        return ( ( data >> rotation ) | ( data << ( 64 - rotation ) ) );
+}
+
+#endif /* _GPXE_ROTATE_H */