diff options
Diffstat (limited to 'include/linux/swab.h')
| -rw-r--r-- | include/linux/swab.h | 280 |
1 files changed, 1 insertions, 279 deletions
diff --git a/include/linux/swab.h b/include/linux/swab.h index ea0c02fd5163..9ad3c60f6cae 100644 --- a/include/linux/swab.h +++ b/include/linux/swab.h @@ -1,284 +1,8 @@ #ifndef _LINUX_SWAB_H #define _LINUX_SWAB_H -#include <linux/types.h> -#include <linux/compiler.h> -#include <asm/swab.h> +#include <uapi/linux/swab.h> -/* - * 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. - */ -#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)(x) & (__u64)0x00000000000000ffULL) << 56) | \ - (((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \ - (((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \ - (((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) | \ - (((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) | \ - (((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \ - (((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \ - (((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56))) - -#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))) - -/* - * Implement the following as inlines, but define the interface using - * macros to allow constant folding when possible: - * ___swab16, ___swab32, ___swab64, ___swahw32, ___swahb32 - */ - -static inline __attribute_const__ __u16 __fswab16(__u16 val) -{ -#ifdef __arch_swab16 - return __arch_swab16(val); -#else - return ___constant_swab16(val); -#endif -} - -static inline __attribute_const__ __u32 __fswab32(__u32 val) -{ -#ifdef __arch_swab32 - return __arch_swab32(val); -#else - return ___constant_swab32(val); -#endif -} - -static inline __attribute_const__ __u64 __fswab64(__u64 val) -{ -#ifdef __arch_swab64 - return __arch_swab64(val); -#elif defined(__SWAB_64_THRU_32__) - __u32 h = val >> 32; - __u32 l = val & ((1ULL << 32) - 1); - return (((__u64)__fswab32(l)) << 32) | ((__u64)(__fswab32(h))); -#else - return ___constant_swab64(val); -#endif -} - -static inline __attribute_const__ __u32 __fswahw32(__u32 val) -{ -#ifdef __arch_swahw32 - return __arch_swahw32(val); -#else - return ___constant_swahw32(val); -#endif -} - -static inline __attribute_const__ __u32 __fswahb32(__u32 val) -{ -#ifdef __arch_swahb32 - return __arch_swahb32(val); -#else - return ___constant_swahb32(val); -#endif -} - -/** - * __swab16 - return a byteswapped 16-bit value - * @x: value to byteswap - */ -#define __swab16(x) \ - (__builtin_constant_p((__u16)(x)) ? \ - ___constant_swab16(x) : \ - __fswab16(x)) - -/** - * __swab32 - return a byteswapped 32-bit value - * @x: value to byteswap - */ -#define __swab32(x) \ - (__builtin_constant_p((__u32)(x)) ? \ - ___constant_swab32(x) : \ - __fswab32(x)) - -/** - * __swab64 - return a byteswapped 64-bit value - * @x: value to byteswap - */ -#define __swab64(x) \ - (__builtin_constant_p((__u64)(x)) ? \ - ___constant_swab64(x) : \ - __fswab64(x)) - -/** - * __swahw32 - return a word-swapped 32-bit value - * @x: value to wordswap - * - * __swahw32(0x12340000) is 0x00001234 - */ -#define __swahw32(x) \ - (__builtin_constant_p((__u32)(x)) ? \ - ___constant_swahw32(x) : \ - __fswahw32(x)) - -/** - * __swahb32 - return a high and low byte-swapped 32-bit value - * @x: value to byteswap - * - * __swahb32(0x12345678) is 0x34127856 - */ -#define __swahb32(x) \ - (__builtin_constant_p((__u32)(x)) ? \ - ___constant_swahb32(x) : \ - __fswahb32(x)) - -/** - * __swab16p - return a byteswapped 16-bit value from a pointer - * @p: pointer to a naturally-aligned 16-bit value - */ -static inline __u16 __swab16p(const __u16 *p) -{ -#ifdef __arch_swab16p - return __arch_swab16p(p); -#else - return __swab16(*p); -#endif -} - -/** - * __swab32p - return a byteswapped 32-bit value from a pointer - * @p: pointer to a naturally-aligned 32-bit value - */ -static inline __u32 __swab32p(const __u32 *p) -{ -#ifdef __arch_swab32p - return __arch_swab32p(p); -#else - return __swab32(*p); -#endif -} - -/** - * __swab64p - return a byteswapped 64-bit value from a pointer - * @p: pointer to a naturally-aligned 64-bit value - */ -static inline __u64 __swab64p(const __u64 *p) -{ -#ifdef __arch_swab64p - return __arch_swab64p(p); -#else - return __swab64(*p); -#endif -} - -/** - * __swahw32p - return a wordswapped 32-bit value from a pointer - * @p: pointer to a naturally-aligned 32-bit value - * - * See __swahw32() for details of wordswapping. - */ -static inline __u32 __swahw32p(const __u32 *p) -{ -#ifdef __arch_swahw32p - return __arch_swahw32p(p); -#else - return __swahw32(*p); -#endif -} - -/** - * __swahb32p - return a high and low byteswapped 32-bit value from a pointer - * @p: pointer to a naturally-aligned 32-bit value - * - * See __swahb32() for details of high/low byteswapping. - */ -static inline __u32 __swahb32p(const __u32 *p) -{ -#ifdef __arch_swahb32p - return __arch_swahb32p(p); -#else - return __swahb32(*p); -#endif -} - -/** - * __swab16s - byteswap a 16-bit value in-place - * @p: pointer to a naturally-aligned 16-bit value - */ -static inline void __swab16s(__u16 *p) -{ -#ifdef __arch_swab16s - __arch_swab16s(p); -#else - *p = __swab16p(p); -#endif -} -/** - * __swab32s - byteswap a 32-bit value in-place - * @p: pointer to a naturally-aligned 32-bit value - */ -static inline void __swab32s(__u32 *p) -{ -#ifdef __arch_swab32s - __arch_swab32s(p); -#else - *p = __swab32p(p); -#endif -} - -/** - * __swab64s - byteswap a 64-bit value in-place - * @p: pointer to a naturally-aligned 64-bit value - */ -static inline void __swab64s(__u64 *p) -{ -#ifdef __arch_swab64s - __arch_swab64s(p); -#else - *p = __swab64p(p); -#endif -} - -/** - * __swahw32s - wordswap a 32-bit value in-place - * @p: pointer to a naturally-aligned 32-bit value - * - * See __swahw32() for details of wordswapping - */ -static inline void __swahw32s(__u32 *p) -{ -#ifdef __arch_swahw32s - __arch_swahw32s(p); -#else - *p = __swahw32p(p); -#endif -} - -/** - * __swahb32s - high and low byteswap a 32-bit value in-place - * @p: pointer to a naturally-aligned 32-bit value - * - * See __swahb32() for details of high and low byte swapping - */ -static inline void __swahb32s(__u32 *p) -{ -#ifdef __arch_swahb32s - __arch_swahb32s(p); -#else - *p = __swahb32p(p); -#endif -} - -#ifdef __KERNEL__ # define swab16 __swab16 # define swab32 __swab32 # define swab64 __swab64 @@ -294,6 +18,4 @@ static inline void __swahb32s(__u32 *p) # define swab64s __swab64s # define swahw32s __swahw32s # define swahb32s __swahb32s -#endif /* __KERNEL__ */ - #endif /* _LINUX_SWAB_H */ |