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Viewing changes to include/asm-i386/byteorder.h

  • Committer: Bazaar Package Importer
  • Author(s): Oliver Grawert
  • Date: 2010-03-22 15:06:23 UTC
  • Revision ID: james.westby@ubuntu.com-20100322150623-i21g8rgiyl5dohag
Tags: upstream-2010.3git20100315
Import upstream version 2010.3git20100315

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include/asm-i386/byteorder.h
 
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#ifndef _I386_BYTEORDER_H
 
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#define _I386_BYTEORDER_H
 
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#include <asm/types.h>
 
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#ifdef __GNUC__
 
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static __inline__ __u32 ___arch__swab32(__u32 x)
 
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{
 
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#ifdef CONFIG_X86_BSWAP
 
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        __asm__("bswap %0" : "=r" (x) : "0" (x));
 
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#else
 
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        __asm__("xchgb %b0,%h0\n\t"     /* swap lower bytes     */
 
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                "rorl $16,%0\n\t"       /* swap words           */
 
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                "xchgb %b0,%h0"         /* swap higher bytes    */
 
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                :"=q" (x)
 
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                : "0" (x));
 
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#endif
 
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        return x;
 
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}
 
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static __inline__ __u16 ___arch__swab16(__u16 x)
 
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{
 
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        __asm__("xchgb %b0,%h0"         /* swap bytes           */ \
 
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                : "=q" (x) \
 
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                :  "0" (x)); \
 
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                return x;
 
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}
 
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#define __arch__swab32(x) ___arch__swab32(x)
 
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#define __arch__swab16(x) ___arch__swab16(x)
 
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#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
 
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#  define __BYTEORDER_HAS_U64__
 
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#  define __SWAB_64_THRU_32__
 
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#endif
 
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#endif /* __GNUC__ */
 
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#include <linux/byteorder/little_endian.h>
 
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#endif /* _I386_BYTEORDER_H */