49 lines
862 B
C
49 lines
862 B
C
/* $NetBSD: bswap.h,v 1.3 2002/03/17 17:55:24 uch Exp $ */
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/* Written by Manuel Bouyer. Public domain */
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#ifndef _SH3_BSWAP_H_
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#define _SH3_BSWAP_H_
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#include <sys/cdefs.h>
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#ifndef _KERNEL
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__BEGIN_DECLS
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u_int16_t bswap16(u_int16_t);
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u_int32_t bswap32(u_int32_t);
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u_int64_t bswap64(u_int64_t);
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__END_DECLS
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#else /* _KERNEL */
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__BEGIN_DECLS
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static __inline u_int16_t bswap16(u_int16_t);
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static __inline u_int32_t bswap32(u_int32_t);
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u_int64_t bswap64(u_int64_t);
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__END_DECLS
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static __inline u_int16_t
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bswap16(u_int16_t x)
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{
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u_int16_t rval;
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__asm __volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x));
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return (rval);
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}
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static __inline u_int32_t
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bswap32(u_int32_t x)
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{
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u_int32_t rval;
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__asm __volatile ("swap.b %1,%0; swap.w %0,%0; swap.b %0,%0"
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: "=r"(rval) : "r"(x));
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return (rval);
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}
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#endif /* _KERNEL */
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#endif /* !_SH3_BSWAP_H_ */
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