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139 lines
5.2 KiB
139 lines
5.2 KiB
# --- T2-COPYRIGHT-NOTE-BEGIN --- |
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# This copyright note is auto-generated by ./scripts/Create-CopyPatch. |
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# |
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# T2 SDE: package/.../dietlibc/byteswap_prot_h.patch |
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# Copyright (C) 2004 - 2006 The T2 SDE Project |
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# Copyright (C) 1998 - 2004 Clifford Wolf |
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# |
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# More information can be found in the files COPYING and README. |
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# |
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# This patch file is dual-licensed. It is available under the license the |
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# patched project is licensed under, as long as it is an OpenSource license |
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# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms |
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# of the GNU General Public License as published by the Free Software |
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# Foundation; either version 2 of the License, or (at your option) any later |
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# version. |
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# --- T2-COPYRIGHT-NOTE-END --- |
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e2fsprogs >_< |
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--- /dev/null Thu Jan 1 00:00:00 1970 |
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+++ ./include/byteswap_prot.h Sat Jan 11 01:23:36 2003 |
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@@ -0,0 +1,117 @@ |
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+/* Macros to swap the order of bytes in integer values. |
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+ Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, write to the Free |
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+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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+ 02111-1307 USA. */ |
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+ |
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+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H |
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+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead." |
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+#endif |
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+ |
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+#ifndef _BITS_BYTESWAP_H |
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+#define _BITS_BYTESWAP_H 1 |
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+ |
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+/* Swap bytes in 16 bit value. */ |
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+#define __bswap_constant_16(x) \ |
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+ ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8)) |
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+ |
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+#if defined __GNUC__ && __GNUC__ >= 2 |
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+# define __bswap_16(x) \ |
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+ (__extension__ \ |
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+ ({ register unsigned short int __v, __x = (x); \ |
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+ if (__builtin_constant_p (__x)) \ |
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+ __v = __bswap_constant_16 (__x); \ |
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+ else \ |
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+ __asm__ ("rorw $8, %w0" \ |
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+ : "=r" (__v) \ |
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+ : "0" (__x) \ |
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+ : "cc"); \ |
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+ __v; })) |
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+#else |
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+/* This is better than nothing. */ |
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+# define __bswap_16(x) \ |
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+ (__extension__ \ |
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+ ({ register unsigned short int __x = (x); __bswap_constant_16 (__x); })) |
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+#endif |
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+ |
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+ |
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+/* Swap bytes in 32 bit value. */ |
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+#define __bswap_constant_32(x) \ |
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+ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ |
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+ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) |
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+ |
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+#if defined __GNUC__ && __GNUC__ >= 2 |
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+/* To swap the bytes in a word the i486 processors and up provide the |
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+ `bswap' opcode. On i386 we have to use three instructions. */ |
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+# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__ |
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+# define __bswap_32(x) \ |
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+ (__extension__ \ |
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+ ({ register unsigned int __v, __x = (x); \ |
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+ if (__builtin_constant_p (__x)) \ |
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+ __v = __bswap_constant_32 (__x); \ |
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+ else \ |
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+ __asm__ ("rorw $8, %w0;" \ |
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+ "rorl $16, %0;" \ |
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+ "rorw $8, %w0" \ |
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+ : "=r" (__v) \ |
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+ : "0" (__x) \ |
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+ : "cc"); \ |
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+ __v; })) |
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+# else |
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+# define __bswap_32(x) \ |
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+ (__extension__ \ |
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+ ({ register unsigned int __v, __x = (x); \ |
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+ if (__builtin_constant_p (__x)) \ |
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+ __v = __bswap_constant_32 (__x); \ |
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+ else \ |
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+ __asm__ ("bswap %0" : "=r" (__v) : "0" (__x)); \ |
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+ __v; })) |
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+# endif |
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+#else |
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+# define __bswap_16(x) \ |
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+ (__extension__ \ |
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+ ({ register unsigned int __x = (x); __bswap_constant_32 (__x); })) |
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+#endif |
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+ |
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+ |
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+#if defined __GNUC__ && __GNUC__ >= 2 |
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+/* Swap bytes in 64 bit value. */ |
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+#define __bswap_constant_64(x) \ |
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+ ((((x) & 0xff00000000000000ull) >> 56) \ |
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+ | (((x) & 0x00ff000000000000ull) >> 40) \ |
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+ | (((x) & 0x0000ff0000000000ull) >> 24) \ |
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+ | (((x) & 0x000000ff00000000ull) >> 8) \ |
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+ | (((x) & 0x00000000ff000000ull) << 8) \ |
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+ | (((x) & 0x0000000000ff0000ull) << 24) \ |
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+ | (((x) & 0x000000000000ff00ull) << 40) \ |
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+ | (((x) & 0x00000000000000ffull) << 56)) |
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+ |
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+# define __bswap_64(x) \ |
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+ (__extension__ \ |
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+ ({ union { __extension__ unsigned long long int __ll; \ |
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+ unsigned long int __l[2]; } __w, __r; \ |
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+ __w.__ll = (x); \ |
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+ if (__builtin_constant_p (__w.__ll)) \ |
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+ __r.__ll = __bswap_constant_64 (__w.__ll); \ |
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+ else \ |
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+ { \ |
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+ __r.__l[0] = __bswap_32 (__w.__l[1]); \ |
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+ __r.__l[1] = __bswap_32 (__w.__l[0]); \ |
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+ } \ |
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+ __r.__ll; })) |
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+#endif |
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+ |
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+#endif /* _BITS_BYTESWAP_H */
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