diff options
Diffstat (limited to 'sysdeps/i386/bits/byteswap.h')
| -rw-r--r-- | sysdeps/i386/bits/byteswap.h | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/sysdeps/i386/bits/byteswap.h b/sysdeps/i386/bits/byteswap.h deleted file mode 100644 index 3542816385..0000000000 --- a/sysdeps/i386/bits/byteswap.h +++ /dev/null @@ -1,126 +0,0 @@ -/* Macros to swap the order of bytes in integer values. - Copyright (C) 1997-2012 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, see - <http://www.gnu.org/licenses/>. */ - -#if !defined _BYTESWAP_H && !defined _NETINET_IN_H && !defined _ENDIAN_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) \ - ((unsigned short int) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))) - -/* Get __bswap_16. */ -#include <bits/byteswap-16.h> - -/* Swap bytes in 32 bit value. */ -#define __bswap_constant_32(x) \ - ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ - (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) - -#ifdef __GNUC__ -# if __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. */ -# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__ \ - && !defined __pentium4__ && !defined __k8__ && !defined __athlon__ \ - && !defined __k6__ && !defined __nocona__ && !defined __core2__ \ - && !defined __geode__ && !defined __amdfam10__ -# define __bswap_32(x) \ - (__extension__ \ - ({ register unsigned int __v, __x = (x); \ - if (__builtin_constant_p (__x)) \ - __v = __bswap_constant_32 (__x); \ - else \ - __asm__ ("rorw $8, %w0;" \ - "rorl $16, %0;" \ - "rorw $8, %w0" \ - : "=r" (__v) \ - : "0" (__x) \ - : "cc"); \ - __v; })) -# else -# define __bswap_32(x) \ - (__extension__ \ - ({ register unsigned int __v, __x = (x); \ - if (__builtin_constant_p (__x)) \ - __v = __bswap_constant_32 (__x); \ - else \ - __asm__ ("bswap %0" : "=r" (__v) : "0" (__x)); \ - __v; })) -# endif -# else -# define __bswap_32(x) \ - (__extension__ \ - ({ register unsigned int __x = (x); __bswap_constant_32 (__x); })) -# endif -#else -static __inline unsigned int -__bswap_32 (unsigned int __bsx) -{ - return __bswap_constant_32 (__bsx); -} -#endif - - -#if defined __GNUC__ && __GNUC__ >= 2 -/* Swap bytes in 64 bit value. */ -# define __bswap_constant_64(x) \ - (__extension__ ((((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 { __extension__ unsigned long long int __ll; \ - unsigned long 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; })) -#elif __GLIBC_HAVE_LONG_LONG -# 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)) - -static __inline unsigned long long int -__bswap_64 (unsigned long long int __bsx) -{ - return __bswap_constant_64 (__bsx); -} -#endif - -#endif /* _BITS_BYTESWAP_H */ |