[thirdparty/xfsprogs-dev.git] / include / xfs_arch.h

/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_ARCH_H__
#define __XFS_ARCH_H__

#if __BYTE_ORDER == __BIG_ENDIAN
#define	XFS_NATIVE_HOST	1
#else
#undef XFS_NATIVE_HOST
#endif

#ifdef __CHECKER__
#define __bitwise		__attribute__((bitwise))
#define __force			__attribute__((force))
#else
#define __bitwise
#define __force
#endif

typedef __u16	__bitwise	__le16;
typedef __u32	__bitwise	__le32;
typedef __u64	__bitwise	__le64;

typedef __u16	__bitwise	__be16;
typedef __u32	__bitwise	__be32;
typedef __u64	__bitwise	__be64;

/*
 * Casts are necessary for constants, because we never know how for sure
 * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
 */
#define ___swab16(x) \
({ \
	__u16 __x = (x); \
	((__u16)( \
		(((__u16)(__x) & (__u16)0x00ffU) << 8) | \
		(((__u16)(__x) & (__u16)0xff00U) >> 8) )); \
})

#define ___swab32(x) \
({ \
	__u32 __x = (x); \
	((__u32)( \
		(((__u32)(__x) & (__u32)0x000000ffUL) << 24) | \
		(((__u32)(__x) & (__u32)0x0000ff00UL) <<  8) | \
		(((__u32)(__x) & (__u32)0x00ff0000UL) >>  8) | \
		(((__u32)(__x) & (__u32)0xff000000UL) >> 24) )); \
})

#define ___swab64(x) \
({ \
	__u64 __x = (x); \
	((__u64)( \
		(__u64)(((__u64)(__x) & (__u64)0x00000000000000ffULL) << 56) | \
		(__u64)(((__u64)(__x) & (__u64)0x000000000000ff00ULL) << 40) | \
		(__u64)(((__u64)(__x) & (__u64)0x0000000000ff0000ULL) << 24) | \
		(__u64)(((__u64)(__x) & (__u64)0x00000000ff000000ULL) <<  8) | \
		(__u64)(((__u64)(__x) & (__u64)0x000000ff00000000ULL) >>  8) | \
		(__u64)(((__u64)(__x) & (__u64)0x0000ff0000000000ULL) >> 24) | \
		(__u64)(((__u64)(__x) & (__u64)0x00ff000000000000ULL) >> 40) | \
		(__u64)(((__u64)(__x) & (__u64)0xff00000000000000ULL) >> 56) )); \
})

#define ___constant_swab16(x) \
	((__u16)( \
		(((__u16)(x) & (__u16)0x00ffU) << 8) | \
		(((__u16)(x) & (__u16)0xff00U) >> 8) ))
#define ___constant_swab32(x) \
	((__u32)( \
		(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
		(((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
		(((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
		(((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
#define ___constant_swab64(x) \
	((__u64)( \
		(__u64)(((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) | \
		(__u64)(((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \
		(__u64)(((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \
		(__u64)(((__u64)(x) & (__u64)0x00000000ff000000ULL) <<  8) | \
		(__u64)(((__u64)(x) & (__u64)0x000000ff00000000ULL) >>  8) | \
		(__u64)(((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \
		(__u64)(((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \
		(__u64)(((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56) ))

/*
 * provide defaults when no architecture-specific optimization is detected
 */
#ifndef __arch__swab16
#  define __arch__swab16(x) ({ __u16 __tmp = (x) ; ___swab16(__tmp); })
#endif
#ifndef __arch__swab32
#  define __arch__swab32(x) ({ __u32 __tmp = (x) ; ___swab32(__tmp); })
#endif
#ifndef __arch__swab64
#  define __arch__swab64(x) ({ __u64 __tmp = (x) ; ___swab64(__tmp); })
#endif

#ifndef __arch__swab16p
#  define __arch__swab16p(x) __arch__swab16(*(x))
#endif
#ifndef __arch__swab32p
#  define __arch__swab32p(x) __arch__swab32(*(x))
#endif
#ifndef __arch__swab64p
#  define __arch__swab64p(x) __arch__swab64(*(x))
#endif

#ifndef __arch__swab16s
#  define __arch__swab16s(x) do { *(x) = __arch__swab16p((x)); } while (0)
#endif
#ifndef __arch__swab32s
#  define __arch__swab32s(x) do { *(x) = __arch__swab32p((x)); } while (0)
#endif
#ifndef __arch__swab64s
#  define __arch__swab64s(x) do { *(x) = __arch__swab64p((x)); } while (0)
#endif


/*
 * Allow constant folding
 */
#  define __swab16(x) \
(__builtin_constant_p((__u16)(x)) ? \
 ___constant_swab16((x)) : \
 __fswab16((x)))
#  define __swab32(x) \
(__builtin_constant_p((__u32)(x)) ? \
 ___constant_swab32((x)) : \
 __fswab32((x)))
#  define __swab64(x) \
(__builtin_constant_p((__u64)(x)) ? \
 ___constant_swab64((x)) : \
 __fswab64((x)))


static __inline__ __u16 __fswab16(__u16 x)
{
	return (__extension__ __arch__swab16(x));
}
static __inline__ __u16 __swab16p(__u16 *x)
{
	return (__extension__ __arch__swab16p(x));
}
static __inline__ void __swab16s(__u16 *addr)
{
	(__extension__ ({__arch__swab16s(addr);}));
}

static __inline__ __u32 __fswab32(__u32 x)
{
	return (__extension__ __arch__swab32(x));
}
static __inline__ __u32 __swab32p(__u32 *x)
{
	return (__extension__ __arch__swab32p(x));
}
static __inline__ void __swab32s(__u32 *addr)
{
	(__extension__ ({__arch__swab32s(addr);}));
}

static __inline__ __u64 __fswab64(__u64 x)
{
#  ifdef __SWAB_64_THRU_32__
	__u32 h = x >> 32;
	__u32 l = x & ((1ULL<<32)-1);
	return (((__u64)__swab32(l)) << 32) | ((__u64)(__swab32(h)));
#  else
	return (__extension__ __arch__swab64(x));
#  endif
}
static __inline__ __u64 __swab64p(__u64 *x)
{
	return (__extension__ __arch__swab64p(x));
}
static __inline__ void __swab64s(__u64 *addr)
{
	(__extension__ ({__arch__swab64s(addr);}));
}

#ifdef XFS_NATIVE_HOST
#define cpu_to_be16(val)	((__force __be16)(__u16)(val))
#define cpu_to_be32(val)	((__force __be32)(__u32)(val))
#define cpu_to_be64(val)	((__force __be64)(__u64)(val))
#define be16_to_cpu(val)	((__force __u16)(__be16)(val))
#define be32_to_cpu(val)	((__force __u32)(__be32)(val))
#define be64_to_cpu(val)	((__force __u64)(__be64)(val))

#define cpu_to_le32(val)	((__force __be32)__swab32((__u32)(val)))
#define le32_to_cpu(val)	(__swab32((__force __u32)(__le32)(val)))

#define __constant_cpu_to_le32(val)	\
	((__force __le32)___constant_swab32((__u32)(val)))
#define __constant_cpu_to_be32(val)	\
	((__force __be32)(__u32)(val))
#else
#define cpu_to_be16(val)	((__force __be16)__swab16((__u16)(val)))
#define cpu_to_be32(val)	((__force __be32)__swab32((__u32)(val)))
#define cpu_to_be64(val)	((__force __be64)__swab64((__u64)(val)))
#define be16_to_cpu(val)	(__swab16((__force __u16)(__be16)(val)))
#define be32_to_cpu(val)	(__swab32((__force __u32)(__be32)(val)))
#define be64_to_cpu(val)	(__swab64((__force __u64)(__be64)(val)))

#define cpu_to_le32(val)	((__force __le32)(__u32)(val))
#define le32_to_cpu(val)	((__force __u32)(__le32)(val))

#define __constant_cpu_to_le32(val)	\
	((__force __le32)(__u32)(val))
#define __constant_cpu_to_be32(val)	\
	((__force __be32)___constant_swab32((__u32)(val)))
#endif

static inline void be16_add_cpu(__be16 *a, __s16 b)
{
	*a = cpu_to_be16(be16_to_cpu(*a) + b);
}

static inline void be32_add_cpu(__be32 *a, __s32 b)
{
	*a = cpu_to_be32(be32_to_cpu(*a) + b);
}

static inline void be64_add_cpu(__be64 *a, __s64 b)
{
	*a = cpu_to_be64(be64_to_cpu(*a) + b);
}

static inline __uint16_t get_unaligned_be16(void *p)
{
	__uint8_t *__p = p;
	return __p[0] << 8 | __p[1];
}

static inline __uint32_t get_unaligned_be32(void *p)
{
	__uint8_t *__p = p;
        return __p[0] << 24 | __p[1] << 16 | __p[2] << 8 | __p[3];
}

static inline __uint64_t get_unaligned_be64(void *p)
{
	return (__uint64_t)get_unaligned_be32(p) << 32 |
			   get_unaligned_be32(p + 4);
}

static inline void put_unaligned_be16(__uint16_t val, void *p)
{
	__uint8_t *__p = p;
	*__p++ = val >> 8;
	*__p++ = val;
}

static inline void put_unaligned_be32(__uint32_t val, void *p)
{
	__uint8_t *__p = p;
	put_unaligned_be16(val >> 16, __p);
	put_unaligned_be16(val, __p + 2);
}

static inline void put_unaligned_be64(__uint64_t val, void *p)
{
	put_unaligned_be32(val >> 32, p);
	put_unaligned_be32(val, p + 4);
}

#endif	/* __XFS_ARCH_H__ */
Commit	Line	Data
2bd0ea18	1	/*
5e656dbb	2	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
f302e9e4	3	* All Rights Reserved.
5000d01d	4	*
f302e9e4 NS	5	* This program is free software; you can redistribute it and/or
f302e9e4 NS	6	* modify it under the terms of the GNU General Public License as
2bd0ea18	7	* published by the Free Software Foundation.
5000d01d	8	*
f302e9e4 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
5000d01d	13	*
f302e9e4 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
2bd0ea18 NS	17	*/
	18	#ifndef __XFS_ARCH_H__
	19	#define __XFS_ARCH_H__
	20
f302e9e4 NS	21	#if __BYTE_ORDER == __BIG_ENDIAN
	22	#define XFS_NATIVE_HOST 1
	23	#else
	24	#undef XFS_NATIVE_HOST
836f654f NS	25	#endif
836f654f NS	26
1e6bc37b CH	27	#ifdef __CHECKER__
	28	#define __bitwise __attribute__((bitwise))
	29	#define __force __attribute__((force))
	30	#else
	31	#define __bitwise
	32	#define __force
	33	#endif
	34
	35	typedef __u16 __bitwise __le16;
	36	typedef __u32 __bitwise __le32;
	37	typedef __u64 __bitwise __le64;
	38
	39	typedef __u16 __bitwise __be16;
	40	typedef __u32 __bitwise __be32;
	41	typedef __u64 __bitwise __be64;
	42
cd36c33e CH	43	/*
	44	* Casts are necessary for constants, because we never know how for sure
	45	* how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
	46	*/
	47	#define ___swab16(x) \
	48	({ \
	49	__u16 __x = (x); \
	50	((__u16)( \
	51	(((__u16)(__x) & (__u16)0x00ffU) << 8) \| \
	52	(((__u16)(__x) & (__u16)0xff00U) >> 8) )); \
	53	})
	54
	55	#define ___swab32(x) \
	56	({ \
	57	__u32 __x = (x); \
	58	((__u32)( \
	59	(((__u32)(__x) & (__u32)0x000000ffUL) << 24) \| \
	60	(((__u32)(__x) & (__u32)0x0000ff00UL) << 8) \| \
	61	(((__u32)(__x) & (__u32)0x00ff0000UL) >> 8) \| \
	62	(((__u32)(__x) & (__u32)0xff000000UL) >> 24) )); \
	63	})
	64
	65	#define ___swab64(x) \
	66	({ \
	67	__u64 __x = (x); \
	68	((__u64)( \
	69	(__u64)(((__u64)(__x) & (__u64)0x00000000000000ffULL) << 56) \| \
	70	(__u64)(((__u64)(__x) & (__u64)0x000000000000ff00ULL) << 40) \| \
	71	(__u64)(((__u64)(__x) & (__u64)0x0000000000ff0000ULL) << 24) \| \
	72	(__u64)(((__u64)(__x) & (__u64)0x00000000ff000000ULL) << 8) \| \
	73	(__u64)(((__u64)(__x) & (__u64)0x000000ff00000000ULL) >> 8) \| \
	74	(__u64)(((__u64)(__x) & (__u64)0x0000ff0000000000ULL) >> 24) \| \
	75	(__u64)(((__u64)(__x) & (__u64)0x00ff000000000000ULL) >> 40) \| \
	76	(__u64)(((__u64)(__x) & (__u64)0xff00000000000000ULL) >> 56) )); \
	77	})
	78
	79	#define ___constant_swab16(x) \
	80	((__u16)( \
	81	(((__u16)(x) & (__u16)0x00ffU) << 8) \| \
	82	(((__u16)(x) & (__u16)0xff00U) >> 8) ))
	83	#define ___constant_swab32(x) \
	84	((__u32)( \
	85	(((__u32)(x) & (__u32)0x000000ffUL) << 24) \| \
	86	(((__u32)(x) & (__u32)0x0000ff00UL) << 8) \| \
	87	(((__u32)(x) & (__u32)0x00ff0000UL) >> 8) \| \
	88	(((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
	89	#define ___constant_swab64(x) \
	90	((__u64)( \
	91	(__u64)(((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) \| \
	92	(__u64)(((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) \| \
	93	(__u64)(((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) \| \
	94	(__u64)(((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) \| \
	95	(__u64)(((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) \| \
	96	(__u64)(((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) \| \
	97	(__u64)(((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) \| \
	98	(__u64)(((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56) ))
	99
	100	/*
	101	* provide defaults when no architecture-specific optimization is detected
	102	*/
	103	#ifndef __arch__swab16
	104	# define __arch__swab16(x) ({ __u16 __tmp = (x) ; ___swab16(__tmp); })
	105	#endif
	106	#ifndef __arch__swab32
107	# define __arch__swab32(x) ({ __u32 __tmp = (x) ; ___swab32(__tmp); })
108	#endif
109	#ifndef __arch__swab64
110	# define __arch__swab64(x) ({ __u64 __tmp = (x) ; ___swab64(__tmp); })
111	#endif
112
113	#ifndef __arch__swab16p
114	# define __arch__swab16p(x) __arch__swab16(*(x))
115	#endif
116	#ifndef __arch__swab32p
117	# define __arch__swab32p(x) __arch__swab32(*(x))
118	#endif
119	#ifndef __arch__swab64p
120	# define __arch__swab64p(x) __arch__swab64(*(x))
121	#endif
122
123	#ifndef __arch__swab16s
124	# define __arch__swab16s(x) do { *(x) = __arch__swab16p((x)); } while (0)
125	#endif
126	#ifndef __arch__swab32s
127	# define __arch__swab32s(x) do { *(x) = __arch__swab32p((x)); } while (0)
128	#endif
129	#ifndef __arch__swab64s
130	# define __arch__swab64s(x) do { *(x) = __arch__swab64p((x)); } while (0)
131	#endif
132
133
134	/*
135	* Allow constant folding
136	*/
137	# define __swab16(x) \
138	(__builtin_constant_p((__u16)(x)) ? \
139	___constant_swab16((x)) : \
140	__fswab16((x)))
141	# define __swab32(x) \
142	(__builtin_constant_p((__u32)(x)) ? \
143	___constant_swab32((x)) : \
144	__fswab32((x)))
145	# define __swab64(x) \
146	(__builtin_constant_p((__u64)(x)) ? \
147	___constant_swab64((x)) : \
148	__fswab64((x)))
149
150
151	static __inline__ __u16 __fswab16(__u16 x)
152	{
153	return (__extension__ __arch__swab16(x));
154	}
155	static __inline__ __u16 __swab16p(__u16 *x)
156	{
157	return (__extension__ __arch__swab16p(x));
158	}
159	static __inline__ void __swab16s(__u16 *addr)
160	{
161	(__extension__ ({__arch__swab16s(addr);}));
162	}
163
164	static __inline__ __u32 __fswab32(__u32 x)
165	{
166	return (__extension__ __arch__swab32(x));
167	}
168	static __inline__ __u32 __swab32p(__u32 *x)
169	{
170	return (__extension__ __arch__swab32p(x));
171	}
172	static __inline__ void __swab32s(__u32 *addr)
173	{
174	(__extension__ ({__arch__swab32s(addr);}));
175	}
176
177	static __inline__ __u64 __fswab64(__u64 x)
178	{
179	# ifdef __SWAB_64_THRU_32__
180	__u32 h = x >> 32;
181	__u32 l = x & ((1ULL<<32)-1);
182	return (((__u64)__swab32(l)) << 32) \| ((__u64)(__swab32(h)));
183	# else
184	return (__extension__ __arch__swab64(x));
185	# endif
186	}
187	static __inline__ __u64 __swab64p(__u64 *x)
188	{
189	return (__extension__ __arch__swab64p(x));
190	}
191	static __inline__ void __swab64s(__u64 *addr)
192	{
193	(__extension__ ({__arch__swab64s(addr);}));
194	}
195
7cfabea3	196	#ifdef XFS_NATIVE_HOST
5e656dbb BN	197	#define cpu_to_be16(val) ((__force __be16)(__u16)(val))
	198	#define cpu_to_be32(val) ((__force __be32)(__u32)(val))
	199	#define cpu_to_be64(val) ((__force __be64)(__u64)(val))
	200	#define be16_to_cpu(val) ((__force __u16)(__be16)(val))
	201	#define be32_to_cpu(val) ((__force __u32)(__be32)(val))
	202	#define be64_to_cpu(val) ((__force __u64)(__be64)(val))
7e280e68 DC	203
	204	#define cpu_to_le32(val) ((__force __be32)__swab32((__u32)(val)))
	205	#define le32_to_cpu(val) (__swab32((__force __u32)(__le32)(val)))
	206
	207	#define __constant_cpu_to_le32(val) \
	208	((__force __le32)___constant_swab32((__u32)(val)))
	209	#define __constant_cpu_to_be32(val) \
	210	((__force __be32)(__u32)(val))
7cfabea3	211	#else
5e656dbb BN	212	#define cpu_to_be16(val) ((__force __be16)__swab16((__u16)(val)))
	213	#define cpu_to_be32(val) ((__force __be32)__swab32((__u32)(val)))
	214	#define cpu_to_be64(val) ((__force __be64)__swab64((__u64)(val)))
	215	#define be16_to_cpu(val) (__swab16((__force __u16)(__be16)(val)))
	216	#define be32_to_cpu(val) (__swab32((__force __u32)(__be32)(val)))
	217	#define be64_to_cpu(val) (__swab64((__force __u64)(__be64)(val)))
7e280e68 DC	218
	219	#define cpu_to_le32(val) ((__force __le32)(__u32)(val))
	220	#define le32_to_cpu(val) ((__force __u32)(__le32)(val))
	221
	222	#define __constant_cpu_to_le32(val) \
	223	((__force __le32)(__u32)(val))
	224	#define __constant_cpu_to_be32(val) \
	225	((__force __be32)___constant_swab32((__u32)(val)))
7cfabea3 CH	226	#endif
7cfabea3 CH	227
5e656dbb BN	228	static inline void be16_add_cpu(__be16 *a, __s16 b)
	229	{
	230	a = cpu_to_be16(be16_to_cpu(a) + b);
	231	}
	232
	233	static inline void be32_add_cpu(__be32 *a, __s32 b)
	234	{
	235	a = cpu_to_be32(be32_to_cpu(a) + b);
	236	}
	237
	238	static inline void be64_add_cpu(__be64 *a, __s64 b)
	239	{
	240	a = cpu_to_be64(be64_to_cpu(a) + b);
	241	}
	242
cd36c33e CH	243	static inline __uint16_t get_unaligned_be16(void *p)
	244	{
	245	__uint8_t *__p = p;
	246	return __p[0] << 8 \| __p[1];
	247	}
	248
	249	static inline __uint32_t get_unaligned_be32(void *p)
	250	{
	251	__uint8_t *__p = p;
	252	return __p[0] << 24 \| __p[1] << 16 \| __p[2] << 8 \| __p[3];
	253	}
	254
	255	static inline __uint64_t get_unaligned_be64(void *p)
	256	{
	257	return (__uint64_t)get_unaligned_be32(p) << 32 \|
	258	get_unaligned_be32(p + 4);
	259	}
	260
	261	static inline void put_unaligned_be16(__uint16_t val, void *p)
	262	{
	263	__uint8_t *__p = p;
	264	*__p++ = val >> 8;
	265	*__p++ = val;
	266	}
	267
	268	static inline void put_unaligned_be32(__uint32_t val, void *p)
	269	{
	270	__uint8_t *__p = p;
	271	put_unaligned_be16(val >> 16, __p);
	272	put_unaligned_be16(val, __p + 2);
	273	}
	274
	275	static inline void put_unaligned_be64(__uint64_t val, void *p)
	276	{
	277	put_unaligned_be32(val >> 32, p);
	278	put_unaligned_be32(val, p + 4);
	279	}
	280
2bd0ea18	281	#endif /* __XFS_ARCH_H__ */