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

  • Committer: Bazaar Package Importer
  • Author(s): Bastian Blank
  • Date: 2010-05-06 15:47:38 UTC
  • mto: (1.3.1) (15.1.1 sid) (4.1.1 experimental)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20100506154738-agoz0rlafrh1fnq7
Tags: upstream-4.0.0
Import upstream version 4.0.0

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xen/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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/* For avoiding bswap on i386 */
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#ifdef __KERNEL__
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#include <linux/config.h>
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#endif
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static __inline__ __const__ __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__ __const__ __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 */