1 files changed, 33 insertions, 0 deletions
diff --git a/include/asm-x86_64/byteorder.h b/include/asm-x86_64/byteorder.h
new file mode 100644
index 000000000000..5e86c868c75e
--- /dev/null
+++ b/include/asm-x86_64/byteorder.h
@@ -0,0 +1,33 @@
+#ifndef _X86_64_BYTEORDER_H
+#define _X86_64_BYTEORDER_H
+
+#include <asm/types.h>
+#include <linux/compiler.h>
+
+#ifdef __GNUC__
+
+static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
+{
+	__asm__("bswapq %0" : "=r" (x) : "0" (x));
+	return x;
+}
+
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
+{
+	__asm__("bswapl %0" : "=r" (x) : "0" (x));
+	return x;
+}
+
+/* Do not define swab16.  Gcc is smart enough to recognize "C" version and
+   convert it into rotation or exhange.  */
+
+#define __arch__swab32(x) ___arch__swab32(x)
+#define __arch__swab64(x) ___arch__swab64(x)
+
+#endif /* __GNUC__ */
+
+#define __BYTEORDER_HAS_U64__
+
+#include <linux/byteorder/little_endian.h>
+
+#endif /* _X86_64_BYTEORDER_H */