path: root/include/asm-sh/byteorder.h

#ifndef __ASM_SH_BYTEORDER_H
#define __ASM_SH_BYTEORDER_H

/*
 * Copyright (C) 1999  Niibe Yutaka
 * Copyright (C) 2000, 2001  Paolo Alberelli
 */
#include <linux/compiler.h>
#include <linux/types.h>

static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
{
	__asm__(
#ifdef __SH5__
		"byterev	%0, %0\n\t"
		"shari		%0, 32, %0"
#else
		"swap.b		%0, %0\n\t"
		"swap.w		%0, %0\n\t"
		"swap.b		%0, %0"
#endif
		: "=r" (x)
		: "0" (x));

	return x;
}

static inline __attribute_const__ __u16 ___arch__swab16(__u16 x)
{
	__asm__(
#ifdef __SH5__
		"byterev	%0, %0\n\t"
		"shari		%0, 32, %0"
#else
		"swap.b		%0, %0"
#endif
		: "=r" (x)
		:  "0" (x));

	return x;
}

static inline __u64 ___arch__swab64(__u64 val)
{
	union {
		struct { __u32 a,b; } s;
		__u64 u;
	} v, w;
	v.u = val;
	w.s.b = ___arch__swab32(v.s.a);
	w.s.a = ___arch__swab32(v.s.b);
	return w.u;
}

#define __arch__swab64(x) ___arch__swab64(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

#ifdef __LITTLE_ENDIAN__
#include <linux/byteorder/little_endian.h>
#else
#include <linux/byteorder/big_endian.h>
#endif

#endif /* __ASM_SH_BYTEORDER_H */