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authorMike Frysinger <vapier@gentoo.org>2006-08-23 19:25:34 +0000
committerMike Frysinger <vapier@gentoo.org>2006-08-23 19:25:34 +0000
commite47414d975e0ba1fe3a5f329756a20daaf31fefa (patch)
tree5bd13dbe668b130ae6bb38afb9e260aa94e4c3de /libc/sysdeps/linux/ia64/bits/byteswap.h
parenta93c8678684329c262eff95d15561c0262fcf4c1 (diff)
import new headers from upstream via psm
Diffstat (limited to 'libc/sysdeps/linux/ia64/bits/byteswap.h')
-rw-r--r--libc/sysdeps/linux/ia64/bits/byteswap.h110
1 files changed, 110 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/ia64/bits/byteswap.h b/libc/sysdeps/linux/ia64/bits/byteswap.h
new file mode 100644
index 000000000..6862aa0b6
--- /dev/null
+++ b/libc/sysdeps/linux/ia64/bits/byteswap.h
@@ -0,0 +1,110 @@
+/* Macros to swap the order of bytes in integer values.
+ Copyright (C) 1997, 1998, 2000, 2002, 2003 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, 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
+
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H 1
+
+/* 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, __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
+
+
+/* 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
+# define __bswap_32(x) \
+ (__extension__ \
+ ({ register unsigned int __v, __x = (x); \
+ if (__builtin_constant_p (x)) \
+ __v = __bswap_constant_32 (__x); \
+ else \
+ __asm__ __volatile__ ("shl %0 = %1, 32 ;;" \
+ "mux1 %0 = %0, @rev ;;" \
+ : "=r" (__v) \
+ : "r" ((unsigned int) (__x))); \
+ __v; }))
+#else
+static __inline unsigned int
+__bswap_32 (unsigned int __bsx)
+{
+ return __bswap_constant_32 (__bsx);
+}
+#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, __x = (x); \
+ 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
+static __inline unsigned long int
+__bswap_64 (unsigned long int __bsx)
+{
+ return __bswap_constant_64 (__bsx);
+}
+#endif
+
+#endif /* _BITS_BYTESWAP_H */