Microblaze port from the uClinux-dist,

contributed by John Williams <jwilliams@itee.uq.edu.au>

1 files changed, 41 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/microblaze/bits/byteswap.h b/libc/sysdeps/linux/microblaze/bits/byteswap.h
new file mode 100644
index 000000000..9b6a5d722
--- /dev/null
+++ b/libc/sysdeps/linux/microblaze/bits/byteswap.h
@@ -0,0 +1,41 @@
+/*
+ * libc/sysdeps/linux/microblaze/bits/byteswap.h -- Macros to swap the order
+ * 	of bytes in integer values
+ *
+ *  Copyright (C) 2001  NEC Corporation
+ *  Copyright (C) 2001  Miles Bader <miles@gnu.org>
+ *  Copyright (C) 1997,1998,2001  Free Software Foundation, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License.  See the file COPYING.LIB in the main
+ * directory of this archive for more details.
+ */
+
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
+#endif
+
+/* Swap bytes in 16 bit value.  */
+#define __bswap_constant_16(x) \
+  ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+
+# define __bswap_16(x) __bswap_constant_16 (x)
+
+/* Swap bytes in 32 bit value.  */
+#define __bswap_constant_32(x) \
+  ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) | \
+   (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
+
+# define __bswap_32(x) __bswap_constant_32 (x)
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* Swap bytes in 64 bit value.  */
+# define __bswap_64(x)							      \
+     (__extension__							      \
+      ({ union { unsigned long long int __ll;				      \
+		 unsigned long int __l[2]; } __bswap_64_v, __bswap_64_r;      \
+	 __bswap_64_v.__ll = (x);					      \
+	 __bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]);	      \
+	 __bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]);	      \
+	 __bswap_64_r.__ll; }))
+#endif