Sync up sparc headers

1 files changed, 29 insertions, 14 deletions

diff --git a/libc/sysdeps/linux/sparc/bits/byteswap.h b/libc/sysdeps/linux/sparc/bits/byteswap.h
index 6b5115658..7866abe9c 100644
--- a/libc/sysdeps/linux/sparc/bits/byteswap.h
+++ b/libc/sysdeps/linux/sparc/bits/byteswap.h
@@ -1,21 +1,21 @@
 /* Macros to swap the order of bytes in integer values.
-   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998, 2000, 2001 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 Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   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
-   Library General Public License for more details.
+   Lesser General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
 
 #if !defined _BYTESWAP_H && !defined _NETINET_IN_H
 # error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
@@ -53,12 +53,27 @@ __bswap_32 (unsigned int __bsx)
 
 #if defined __GNUC__ && __GNUC__ >= 2
 /* Swap bytes in 64 bit value.  */
+# define __bswap_constant_64(x) \
+     ((((x) & 0xff00000000000000ull) >> 56)				      \
+      | (((x) & 0x00ff000000000000ull) >> 40)				      \
+      | (((x) & 0x0000ff0000000000ull) >> 24)				      \
+      | (((x) & 0x000000ff00000000ull) >> 8)				      \
+      | (((x) & 0x00000000ff000000ull) << 8)				      \
+      | (((x) & 0x0000000000ff0000ull) << 24)				      \
+      | (((x) & 0x000000000000ff00ull) << 40)				      \
+      | (((x) & 0x00000000000000ffull) << 56))
+
 # define __bswap_64(x) \
      (__extension__							      \
-      ({ union { unsigned long long int __ll;				      \
-		 unsigned long int __l[2]; } __v, __r;			      \
-	 __v.__ll = (x);						      \
-	 __r.__l[0] = __bswap_32 (__v.__l[1]);				      \
-	 __r.__l[1] = __bswap_32 (__v.__l[0]);				      \
+      ({ union { __extension__ unsigned long long int __ll;		      \
+		 unsigned int __l[2]; } __w, __r;			      \
+         if (__builtin_constant_p (x))					      \
+	   __r.__ll = __bswap_constant_64 (x);				      \
+	 else								      \
+	   {								      \
+	     __w.__ll = (x);						      \
+	     __r.__l[0] = __bswap_32 (__w.__l[1]);			      \
+	     __r.__l[1] = __bswap_32 (__w.__l[0]);			      \
+	   }								      \
 	 __r.__ll; }))
 #endif