1 files changed, 42 insertions, 0 deletions
diff --git a/libc/ports/sysdeps/ia64/bits/byteswap-16.h b/libc/ports/sysdeps/ia64/bits/byteswap-16.h
new file mode 100644
index 000000000..0a8590927
--- /dev/null
+++ b/libc/ports/sysdeps/ia64/bits/byteswap-16.h
@@ -0,0 +1,42 @@
+/* Macros to swap the order of bytes in 16-bit integer values.
+   Copyright (C) 1997-2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _BITS_BYTESWAP_H
+# error "Never use <bits/byteswap-16.h> directly; include <byteswap.h> instead."
+#endif
+
+#if defined __GNUC__ && __GNUC__ >= 2
+# define __bswap_16(x) \
+     (__extension__							      \
+      ({ register unsigned short int __v, __x = (x);			      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_16 (__x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("shl %0 = %1, 48 ;;"			      \
+				 "mux1 %0 = %0, @rev ;;"		      \
+				 : "=r" (__v)				      \
+				 : "r" ((unsigned short int) (__x)));	      \
+	 __v; }))
+#else
+/* This is better than nothing.  */
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+  return __bswap_constant_16 (__bsx);
+}
+#endif