by sync asm/byteorder.h with linux
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD plagnioj@jcrosoft.com --- include/asm-i386/byteorder.h | 125 +++++++++++++++++++++++++++-------------- 1 files changed, 82 insertions(+), 43 deletions(-) rewrite include/asm-i386/byteorder.h (65%)
diff --git a/include/asm-i386/byteorder.h b/include/asm-i386/byteorder.h dissimilarity index 65% index a9c69d5..545ff75 100644 --- a/include/asm-i386/byteorder.h +++ b/include/asm-i386/byteorder.h @@ -1,43 +1,82 @@ -#ifndef _I386_BYTEORDER_H -#define _I386_BYTEORDER_H - -#include <asm/types.h> - -#ifdef __GNUC__ - - -static __inline__ __const__ __u32 ___arch__swab32(__u32 x) -{ -#ifdef CONFIG_X86_BSWAP - __asm__("bswap %0" : "=r" (x) : "0" (x)); -#else - __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ - "rorl $16,%0\n\t" /* swap words */ - "xchgb %b0,%h0" /* swap higher bytes */ - :"=q" (x) - : "0" (x)); -#endif - return x; -} - -static __inline__ __const__ __u16 ___arch__swab16(__u16 x) -{ - __asm__("xchgb %b0,%h0" /* swap bytes */ \ - : "=q" (x) \ - : "0" (x)); \ - return x; -} - -#define __arch__swab32(x) ___arch__swab32(x) -#define __arch__swab16(x) ___arch__swab16(x) - -#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) -# define __BYTEORDER_HAS_U64__ -# define __SWAB_64_THRU_32__ -#endif - -#endif /* __GNUC__ */ - -#include <linux/byteorder/little_endian.h> - -#endif /* _I386_BYTEORDER_H */ +#ifndef _I386_BYTEORDER_H +#define _I386_BYTEORDER_H + +#include <asm/types.h> + +#ifdef __GNUC__ + +#define __attribute_const__ __attribute__((__const__)) + +#ifdef __i386__ + +static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) +{ +#ifdef CONFIG_X86_BSWAP + asm("bswap %0" : "=r" (x) : "0" (x)); +#else + asm("xchgb %b0,%h0\n\t" /* swap lower bytes */ + "rorl $16,%0\n\t" /* swap words */ + "xchgb %b0,%h0" /* swap higher bytes */ + : "=q" (x) + : "0" (x)); +#endif + return x; +} + +static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val) +{ + union { + struct { + __u32 a; + __u32 b; + } s; + __u64 u; + } v; + v.u = val; +#ifdef CONFIG_X86_BSWAP + asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" + : "=r" (v.s.a), "=r" (v.s.b) + : "0" (v.s.a), "1" (v.s.b)); +#else + v.s.a = ___arch__swab32(v.s.a); + v.s.b = ___arch__swab32(v.s.b); + asm("xchgl %0,%1" + : "=r" (v.s.a), "=r" (v.s.b) + : "0" (v.s.a), "1" (v.s.b)); +#endif + return v.u; +} + +#else /* __i386__ */ + +static inline __attribute_const__ __u64 ___arch__swab64(__u64 x) +{ + asm("bswapq %0" + : "=r" (x) + : "0" (x)); + return x; +} + +static inline __attribute_const__ __u32 ___arch__swab32(__u32 x) +{ + asm("bswapl %0" + : "=r" (x) + : "0" (x)); + return x; +} + +#endif + +/* Do not define swab16. Gcc is smart enough to recognize "C" version and + convert it into rotation or exhange. */ + +#define __arch__swab64(x) ___arch__swab64(x) +#define __arch__swab32(x) ___arch__swab32(x) + +#define __BYTEORDER_HAS_U64__ + +#endif /* __GNUC__ */ + +#include <linux/byteorder/little_endian.h> + +#endif /* _I386_BYTEORDER_H */