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authorEric Andersen <andersen@codepoet.org>2001-03-16 01:06:29 +0000
committerEric Andersen <andersen@codepoet.org>2001-03-16 01:06:29 +0000
commit39f83819e26ed9c63386bdf254d2f6751f54cce9 (patch)
tree45ffe8236f3641ca0b5a9704b5c2b32d52e19d95 /libc/sysdeps/linux/powerpc/bits/byteswap.h
parentaed7ad54eb30fc388b95f98ad4980e8133975656 (diff)
Add powerpc port done by David Schleef <ds@schleef.org>
Diffstat (limited to 'libc/sysdeps/linux/powerpc/bits/byteswap.h')
-rw-r--r--libc/sysdeps/linux/powerpc/bits/byteswap.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/powerpc/bits/byteswap.h b/libc/sysdeps/linux/powerpc/bits/byteswap.h
new file mode 100644
index 000000000..6b5115658
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/bits/byteswap.h
@@ -0,0 +1,64 @@
+/* Macros to swap the order of bytes in integer values.
+ Copyright (C) 1997, 1998 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. */
+#ifdef __GNUC__
+# define __bswap_16(x) \
+ (__extension__ \
+ ({ unsigned short int __bsx = (x); \
+ ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); }))
+#else
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8));
+}
+#endif
+
+/* Swap bytes in 32 bit value. */
+#ifdef __GNUC__
+# define __bswap_32(x) \
+ (__extension__ \
+ ({ unsigned int __bsx = (x); \
+ ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | \
+ (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); }))
+#else
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) |
+ (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24));
+}
+#endif
+
+#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]; } __v, __r; \
+ __v.__ll = (x); \
+ __r.__l[0] = __bswap_32 (__v.__l[1]); \
+ __r.__l[1] = __bswap_32 (__v.__l[0]); \
+ __r.__ll; }))
+#endif