diff options
Diffstat (limited to 'include/linux/byteorder/swab.h')
| -rw-r--r-- | include/linux/byteorder/swab.h | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/include/linux/byteorder/swab.h b/include/linux/byteorder/swab.h deleted file mode 100644 index 142134ff1645..000000000000 --- a/include/linux/byteorder/swab.h +++ /dev/null @@ -1,222 +0,0 @@ -#ifndef _LINUX_BYTEORDER_SWAB_H -#define _LINUX_BYTEORDER_SWAB_H - -/* - * linux/byteorder/swab.h - * Byte-swapping, independently from CPU endianness - * swabXX[ps]?(foo) - * - * Francois-Rene Rideau <fare@tunes.org> 19971205 - * separated swab functions from cpu_to_XX, - * to clean up support for bizarre-endian architectures. - * - * Trent Piepho <xyzzy@speakeasy.org> 2007114 - * make constant-folding work, provide C versions that - * gcc can optimize better, explain different versions - * - * See asm-i386/byteorder.h and suches for examples of how to provide - * architecture-dependent optimized versions - * - */ - -#include <linux/compiler.h> - -/* Functions/macros defined, there are a lot: - * - * ___swabXX - * Generic C versions of the swab functions. - * - * ___constant_swabXX - * C versions that gcc can fold into a compile-time constant when - * the argument is a compile-time constant. - * - * __arch__swabXX[sp]? - * Architecture optimized versions of all the swab functions - * (including the s and p versions). These can be defined in - * asm-arch/byteorder.h. Any which are not, are defined here. - * __arch__swabXXs() is defined in terms of __arch__swabXXp(), which - * is defined in terms of __arch__swabXX(), which is in turn defined - * in terms of ___swabXX(x). - * These must be macros. They may be unsafe for arguments with - * side-effects. - * - * __fswabXX - * Inline function versions of the __arch__ macros. These _are_ safe - * if the arguments have side-effects. Note there are no s and p - * versions of these. - * - * __swabXX[sb] - * There are the ones you should actually use. The __swabXX versions - * will be a constant given a constant argument and use the arch - * specific code (if any) for non-constant arguments. The s and p - * versions always use the arch specific code (constant folding - * doesn't apply). They are safe to use with arguments with - * side-effects. - * - * swabXX[sb] - * Nicknames for __swabXX[sb] to use in the kernel. - */ - -/* casts are necessary for constants, because we never know how for sure - * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way. - */ - -static __inline__ __attribute_const__ __u16 ___swab16(__u16 x) -{ - return x<<8 | x>>8; -} -static __inline__ __attribute_const__ __u32 ___swab32(__u32 x) -{ - return x<<24 | x>>24 | - (x & (__u32)0x0000ff00UL)<<8 | - (x & (__u32)0x00ff0000UL)>>8; -} -static __inline__ __attribute_const__ __u64 ___swab64(__u64 x) -{ - return x<<56 | x>>56 | - (x & (__u64)0x000000000000ff00ULL)<<40 | - (x & (__u64)0x0000000000ff0000ULL)<<24 | - (x & (__u64)0x00000000ff000000ULL)<< 8 | - (x & (__u64)0x000000ff00000000ULL)>> 8 | - (x & (__u64)0x0000ff0000000000ULL)>>24 | - (x & (__u64)0x00ff000000000000ULL)>>40; -} - -#define ___constant_swab16(x) \ - ((__u16)( \ - (((__u16)(x) & (__u16)0x00ffU) << 8) | \ - (((__u16)(x) & (__u16)0xff00U) >> 8) )) -#define ___constant_swab32(x) \ - ((__u32)( \ - (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ - (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ - (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ - (((__u32)(x) & (__u32)0xff000000UL) >> 24) )) -#define ___constant_swab64(x) \ - ((__u64)( \ - (__u64)(((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) | \ - (__u64)(((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \ - (__u64)(((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \ - (__u64)(((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) | \ - (__u64)(((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) | \ - (__u64)(((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \ - (__u64)(((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \ - (__u64)(((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56) )) - -/* - * provide defaults when no architecture-specific optimization is detected - */ -#ifndef __arch__swab16 -# define __arch__swab16(x) ___swab16(x) -#endif -#ifndef __arch__swab32 -# define __arch__swab32(x) ___swab32(x) -#endif -#ifndef __arch__swab64 -# define __arch__swab64(x) ___swab64(x) -#endif - -#ifndef __arch__swab16p -# define __arch__swab16p(x) __arch__swab16(*(x)) -#endif -#ifndef __arch__swab32p -# define __arch__swab32p(x) __arch__swab32(*(x)) -#endif -#ifndef __arch__swab64p -# define __arch__swab64p(x) __arch__swab64(*(x)) -#endif - -#ifndef __arch__swab16s -# define __arch__swab16s(x) ((void)(*(x) = __arch__swab16p(x))) -#endif -#ifndef __arch__swab32s -# define __arch__swab32s(x) ((void)(*(x) = __arch__swab32p(x))) -#endif -#ifndef __arch__swab64s -# define __arch__swab64s(x) ((void)(*(x) = __arch__swab64p(x))) -#endif - - -/* - * Allow constant folding - */ -#if defined(__GNUC__) && defined(__OPTIMIZE__) -# define __swab16(x) \ -(__builtin_constant_p((__u16)(x)) ? \ - ___constant_swab16((x)) : \ - __fswab16((x))) -# define __swab32(x) \ -(__builtin_constant_p((__u32)(x)) ? \ - ___constant_swab32((x)) : \ - __fswab32((x))) -# define __swab64(x) \ -(__builtin_constant_p((__u64)(x)) ? \ - ___constant_swab64((x)) : \ - __fswab64((x))) -#else -# define __swab16(x) __fswab16(x) -# define __swab32(x) __fswab32(x) -# define __swab64(x) __fswab64(x) -#endif /* OPTIMIZE */ - - -static __inline__ __attribute_const__ __u16 __fswab16(__u16 x) -{ - return __arch__swab16(x); -} -static __inline__ __u16 __swab16p(const __u16 *x) -{ - return __arch__swab16p(x); -} -static __inline__ void __swab16s(__u16 *addr) -{ - __arch__swab16s(addr); -} - -static __inline__ __attribute_const__ __u32 __fswab32(__u32 x) -{ - return __arch__swab32(x); -} -static __inline__ __u32 __swab32p(const __u32 *x) -{ - return __arch__swab32p(x); -} -static __inline__ void __swab32s(__u32 *addr) -{ - __arch__swab32s(addr); -} - -#ifdef __BYTEORDER_HAS_U64__ -static __inline__ __attribute_const__ __u64 __fswab64(__u64 x) -{ -# ifdef __SWAB_64_THRU_32__ - __u32 h = x >> 32; - __u32 l = x & ((1ULL<<32)-1); - return (((__u64)__swab32(l)) << 32) | ((__u64)(__swab32(h))); -# else - return __arch__swab64(x); -# endif -} -static __inline__ __u64 __swab64p(const __u64 *x) -{ - return __arch__swab64p(x); -} -static __inline__ void __swab64s(__u64 *addr) -{ - __arch__swab64s(addr); -} -#endif /* __BYTEORDER_HAS_U64__ */ - -#if defined(__KERNEL__) -#define swab16 __swab16 -#define swab32 __swab32 -#define swab64 __swab64 -#define swab16p __swab16p -#define swab32p __swab32p -#define swab64p __swab64p -#define swab16s __swab16s -#define swab32s __swab32s -#define swab64s __swab64s -#endif - -#endif /* _LINUX_BYTEORDER_SWAB_H */ |