about summary refs log tree commit diff
path: root/sysdeps/ia64/bits/byteswap.h
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2000-08-02 01:19:29 +0000
committerUlrich Drepper <drepper@redhat.com>2000-08-02 01:19:29 +0000
commitca8d5a5f3dea0f541fc3c388b6cb01a2d27e9924 (patch)
treed8267bf4da68e57f15d9e0fff328187a34876514 /sysdeps/ia64/bits/byteswap.h
parent8fb81470d9466b7e3d60cbfd6fc2d04fd1aae78a (diff)
downloadglibc-ca8d5a5f3dea0f541fc3c388b6cb01a2d27e9924.tar.gz
glibc-ca8d5a5f3dea0f541fc3c388b6cb01a2d27e9924.tar.xz
glibc-ca8d5a5f3dea0f541fc3c388b6cb01a2d27e9924.zip
Update.
	* sysdeps/ia64/bits/byteswap.h: New file.
	Patch by Dan Pop <Dan.Pop@cern.ch>.

	* misc/sys/cdefs.h: Define __attribute_format_arg__.
	* intl/libintl.h: Use it here instead of using __attribute__ directly.

2000-07-13  H.J. Lu  <hjl@gnu.org>

	* posix/regex.c (re_max_failures): Set to 4000.

2000-08-01  Ulrich Drepper  <drepper@redhat.com>
Diffstat (limited to 'sysdeps/ia64/bits/byteswap.h')
-rw-r--r--sysdeps/ia64/bits/byteswap.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/sysdeps/ia64/bits/byteswap.h b/sysdeps/ia64/bits/byteswap.h
new file mode 100644
index 0000000000..afcb1747e3
--- /dev/null
+++ b/sysdeps/ia64/bits/byteswap.h
@@ -0,0 +1,95 @@
+/* Macros to swap the order of bytes in integer values.
+   Copyright (C) 1997, 1998, 2000 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.
+
+   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.
+
+   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.  */
+
+#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))
+
+#if defined __GNUC__ && __GNUC__ >= 2
+# define __bswap_16(x) \
+     (__extension__							      \
+      ({ register unsigned short int __v;				      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_16 (x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("shl %0 = %1, 48 ;;"			      \
+				 "mux1 %0 = %2, @rev ;;"		      \
+				 : "=r" (__v)				      \
+				 : "r" ((unsigned short int) (x)), "0" (__v));\
+	 __v; }))
+#else
+/* This is better than nothing.  */
+# define __bswap_16(x) __bswap_constant_16 (x)
+#endif
+
+
+/* Swap bytes in 32 bit value.  */
+#define __bswap_constant_32(x) \
+     ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) |		      \
+      (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* To swap the bytes in a word the i486 processors and up provide the
+   `bswap' opcode.  On i386 we have to use three instructions.  */
+# define __bswap_32(x) \
+     (__extension__							      \
+      ({ register unsigned int __v;					      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_32 (x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("shl %0 = %1, 32 ;;"			      \
+				 "mux1 %0 = %2, @rev ;;"		      \
+				 : "=r" (__v)				      \
+				 : "r" ((unsigned int) (x)), "0" (__v));      \
+	 __v; }))
+#else
+# define __bswap_32(x) __bswap_constant_32 (x)
+#endif
+
+
+/* Swap bytes in 64 bit value.  */
+#define __bswap_constant_64(x) \
+     ((((x) & 0xff00000000000000ul) >> 56)				      \
+      | (((x) & 0x00ff000000000000ul) >>  40)				      \
+      | (((x) & 0x0000ff0000000000ul) >> 24)				      \
+      | (((x) & 0x000000ff00000000ul) >> 8)				      \
+      | (((x) & 0x00000000ff000000ul) << 8)				      \
+      | (((x) & 0x0000000000ff0000ul) << 24)				      \
+      | (((x) & 0x000000000000ff00ul) << 40)				      \
+      | (((x) & 0x00000000000000fful) << 56))
+
+#if defined __GNUC__ && __GNUC__ >= 2
+# define __bswap_64(x) \
+     (__extension__							      \
+      ({ register unsigned long int __v;				      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_64 (x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("mux1 %0 = %1, @rev ;;"		      \
+				 : "=r" (__v)				      \
+				 : "r" ((unsigned long int) (x)));	      \
+         __v; }))
+
+#else
+# define __bswap_64(x) __bswap_constant_64 (x)
+#endif