diff options
Diffstat (limited to 'drivers/net/wireless/rtl8188E_8192E/include/byteorder/swabb.h')
| -rwxr-xr-x | drivers/net/wireless/rtl8188E_8192E/include/byteorder/swabb.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/net/wireless/rtl8188E_8192E/include/byteorder/swabb.h b/drivers/net/wireless/rtl8188E_8192E/include/byteorder/swabb.h new file mode 100755 index 00000000..dbbd50f8 --- /dev/null +++ b/drivers/net/wireless/rtl8188E_8192E/include/byteorder/swabb.h @@ -0,0 +1,157 @@ +/****************************************************************************** + * + * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program 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 General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA + * + * + ******************************************************************************/ +#ifndef _LINUX_BYTEORDER_SWABB_H +#define _LINUX_BYTEORDER_SWABB_H + +/* + * linux/byteorder/swabb.h + * SWAp Bytes Bizarrely + * swaHHXX[ps]?(foo) + * + * Support for obNUXIous pdp-endian and other bizarre architectures. + * Will Linux ever run on such ancient beasts? if not, this file + * will be but a programming pearl. Still, it's a reminder that we + * shouldn't be making too many assumptions when trying to be portable. + * + */ + +/* + * Meaning of the names I chose (vaxlinux people feel free to correct them): + * swahw32 swap 16-bit half-words in a 32-bit word + * swahb32 swap 8-bit halves of each 16-bit half-word in a 32-bit word + * + * No 64-bit support yet. I don't know NUXI conventions for long longs. + * I guarantee it will be a mess when it's there, though :-> + * It will be even worse if there are conflicting 64-bit conventions. + * Hopefully, no one ever used 64-bit objects on NUXI machines. + * + */ + +#define ___swahw32(x) \ +({ \ + __u32 __x = (x); \ + ((__u32)( \ + (((__u32)(__x) & (__u32)0x0000ffffUL) << 16) | \ + (((__u32)(__x) & (__u32)0xffff0000UL) >> 16) )); \ +}) +#define ___swahb32(x) \ +({ \ + __u32 __x = (x); \ + ((__u32)( \ + (((__u32)(__x) & (__u32)0x00ff00ffUL) << 8) | \ + (((__u32)(__x) & (__u32)0xff00ff00UL) >> 8) )); \ +}) + +#define ___constant_swahw32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x0000ffffUL) << 16) | \ + (((__u32)(x) & (__u32)0xffff0000UL) >> 16) )) +#define ___constant_swahb32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x00ff00ffUL) << 8) | \ + (((__u32)(x) & (__u32)0xff00ff00UL) >> 8) )) + +/* + * provide defaults when no architecture-specific optimization is detected + */ +#ifndef __arch__swahw32 +# define __arch__swahw32(x) ___swahw32(x) +#endif +#ifndef __arch__swahb32 +# define __arch__swahb32(x) ___swahb32(x) +#endif + +#ifndef __arch__swahw32p +# define __arch__swahw32p(x) __swahw32(*(x)) +#endif +#ifndef __arch__swahb32p +# define __arch__swahb32p(x) __swahb32(*(x)) +#endif + +#ifndef __arch__swahw32s +# define __arch__swahw32s(x) do { *(x) = __swahw32p((x)); } while (0) +#endif +#ifndef __arch__swahb32s +# define __arch__swahb32s(x) do { *(x) = __swahb32p((x)); } while (0) +#endif + + +/* + * Allow constant folding + */ +#if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__) +# define __swahw32(x) \ +(__builtin_constant_p((__u32)(x)) ? \ + ___swahw32((x)) : \ + __fswahw32((x))) +# define __swahb32(x) \ +(__builtin_constant_p((__u32)(x)) ? \ + ___swahb32((x)) : \ + __fswahb32((x))) +#else +# define __swahw32(x) __fswahw32(x) +# define __swahb32(x) __fswahb32(x) +#endif /* OPTIMIZE */ + + +__inline static__ __const__ __u32 __fswahw32(__u32 x) +{ + return __arch__swahw32(x); +} +__inline static__ __u32 __swahw32p(__u32 *x) +{ + return __arch__swahw32p(x); +} +__inline static__ void __swahw32s(__u32 *addr) +{ + __arch__swahw32s(addr); +} + + +__inline static__ __const__ __u32 __fswahb32(__u32 x) +{ + return __arch__swahb32(x); +} +__inline static__ __u32 __swahb32p(__u32 *x) +{ + return __arch__swahb32p(x); +} +__inline static__ void __swahb32s(__u32 *addr) +{ + __arch__swahb32s(addr); +} + +#ifdef __BYTEORDER_HAS_U64__ +/* + * Not supported yet + */ +#endif /* __BYTEORDER_HAS_U64__ */ + +#if defined(PLATFORM_LINUX) +#define swahw32 __swahw32 +#define swahb32 __swahb32 +#define swahw32p __swahw32p +#define swahb32p __swahb32p +#define swahw32s __swahw32s +#define swahb32s __swahb32s +#endif + +#endif /* _LINUX_BYTEORDER_SWABB_H */ + |