[dragonfly.git] / sys / cpu / x86_64 / include / endian.h

/*-
 * Copyright (c) 1987, 1991 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)endian.h	7.8 (Berkeley) 4/3/91
 * $FreeBSD: src/sys/amd64/include/endian.h,v 1.5 2003/09/22 22:37:49 peter Exp $
 */

#ifndef _CPU_ENDIAN_H_
#define	_CPU_ENDIAN_H_

#ifndef _KERNEL
#include <sys/cdefs.h>
#endif

#include <machine/stdint.h>

/*
 * Define the order of 32-bit words in 64-bit words.
 */
#define	_QUAD_HIGHWORD 1
#define	_QUAD_LOWWORD 0

/*
 * Definitions for byte order, according to byte significance from low
 * address to high.
 */
#define	_LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
#define	_BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
#define	_PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */

#define	_BYTE_ORDER	_LITTLE_ENDIAN

/*
 * Deprecated variants that don't have enough underscores to be useful in more
 * strict namespaces.
 */
#if __BSD_VISIBLE
#define	LITTLE_ENDIAN	_LITTLE_ENDIAN
#define	BIG_ENDIAN	_BIG_ENDIAN
#define	PDP_ENDIAN	_PDP_ENDIAN
#define	BYTE_ORDER	_BYTE_ORDER
#endif

#ifdef __GNUC__

#define __word_swap_int_var(x) \
__extension__ ({ register __uint32_t __X = (x); \
   __asm ("rorl $16, %0" : "+r" (__X)); \
   __X; })

#ifdef __OPTIMIZE__

#define	__word_swap_int_const(x) \
	((((x) & 0xffff0000) >> 16) | \
	 (((x) & 0x0000ffff) << 16))
#define	__word_swap_int(x) (__builtin_constant_p(x) ? \
	__word_swap_int_const(x) : __word_swap_int_var(x))

#else	/* __OPTIMIZE__ */

#define	__word_swap_int(x) __word_swap_int_var(x)

#endif	/* __OPTIMIZE__ */

#define __byte_swap_int_var(x) \
__extension__ ({ register __uint32_t __X = (x); \
   __asm ("bswap %0" : "+r" (__X)); \
   __X; })

#ifdef __OPTIMIZE__

#define	__byte_swap_int_const(x) \
	((((x) & 0xff000000) >> 24) | \
	 (((x) & 0x00ff0000) >>  8) | \
	 (((x) & 0x0000ff00) <<  8) | \
	 (((x) & 0x000000ff) << 24))
#define	__byte_swap_int(x) (__builtin_constant_p(x) ? \
	__byte_swap_int_const(x) : __byte_swap_int_var(x))

#else	/* __OPTIMIZE__ */

#define	__byte_swap_int(x) __byte_swap_int_var(x)

#endif	/* __OPTIMIZE__ */

#define __byte_swap_long_var(x) \
__extension__ ({ register __uint64_t __X = (x); \
   __asm ("bswap %0" : "+r" (__X)); \
   __X; })

#define	__byte_swap_long_const(x) \
	(((x >> 56) | \
	 ((x >> 40) & 0xff00) | \
	 ((x >> 24) & 0xff0000) | \
	 ((x >> 8) & 0xff000000) | \
	 ((x << 8) & ((__uint64_t)0xff << 32)) | \
	 ((x << 24) & ((__uint64_t)0xff << 40)) | \
	 ((x << 40) & ((__uint64_t)0xff << 48)) | \
	 ((x << 56))))

#ifdef __i386__

#define	__byte_swap_long(x)	__byte_swap_long_const(x)

#else

#ifdef __OPTIMIZE__
#define	__byte_swap_long(x)	(__builtin_constant_p(x) ? \
	__byte_swap_long_const(x) : __byte_swap_long_var(x))
#else	/* __OPTIMIZE__ */
#define	__byte_swap_long(x)	__byte_swap_long_var(x)
#endif	/* __OPTIMIZE__ */

#endif	/* __i386__ */

#define __byte_swap_word_var(x) \
__extension__ ({ register __uint16_t __X = (x); \
   __asm ("xchgb %h0, %b0" : "+Q" (__X)); \
   __X; })

#ifdef __OPTIMIZE__

#define	__byte_swap_word_const(x) \
	((((x) & 0xff00) >> 8) | \
	 (((x) & 0x00ff) << 8))

#define	__byte_swap_word(x) (__builtin_constant_p(x) ? \
	__byte_swap_word_const(x) : __byte_swap_word_var(x))

#else	/* __OPTIMIZE__ */

#define	__byte_swap_word(x) __byte_swap_word_var(x)

#endif	/* __OPTIMIZE__ */

static __inline __uint64_t
__bswap64(__uint64_t _x)
{

	return (__byte_swap_long(_x));
}

static __inline __uint32_t
__bswap32(__uint32_t _x)
{

	return (__byte_swap_int(_x));
}

static __inline __uint16_t
__bswap16(__uint16_t _x)
{

	return (__byte_swap_word(_x));
}

#define	__htonl(x)	__bswap32(x)
#define	__htons(x)	__bswap16(x)
#define	__ntohl(x)	__bswap32(x)
#define	__ntohs(x)	__bswap16(x)

#else /* !__GNUC__ */

/*
 * No optimizations are available for this compiler.  Fall back to
 * non-optimized functions by defining the constant usually used to prevent
 * redefinition.
 */
#define	_BYTEORDER_FUNC_DEFINED

#endif /* __GNUC__ */

#endif /* !_CPU_ENDIAN_H_ */
Commit	Line	Data
fc3f9779 SS	1	/*-
	2	* Copyright (c) 1987, 1991 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
	33	* @(#)endian.h 7.8 (Berkeley) 4/3/91
	34	* $FreeBSD: src/sys/amd64/include/endian.h,v 1.5 2003/09/22 22:37:49 peter Exp $
fc3f9779 SS	35	*/
	36
	37	#ifndef _CPU_ENDIAN_H_
	38	#define _CPU_ENDIAN_H_
	39
	40	#ifndef _KERNEL
	41	#include <sys/cdefs.h>
	42	#endif
	43
	44	#include <machine/stdint.h>
	45
	46	/*
	47	* Define the order of 32-bit words in 64-bit words.
	48	*/
	49	#define _QUAD_HIGHWORD 1
	50	#define _QUAD_LOWWORD 0
	51
	52	/*
	53	* Definitions for byte order, according to byte significance from low
	54	* address to high.
	55	*/
	56	#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
	57	#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
	58	#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
	59
	60	#define _BYTE_ORDER _LITTLE_ENDIAN
	61
	62	/*
	63	* Deprecated variants that don't have enough underscores to be useful in more
	64	* strict namespaces.
	65	*/
	66	#if __BSD_VISIBLE
	67	#define LITTLE_ENDIAN _LITTLE_ENDIAN
	68	#define BIG_ENDIAN _BIG_ENDIAN
	69	#define PDP_ENDIAN _PDP_ENDIAN
	70	#define BYTE_ORDER _BYTE_ORDER
	71	#endif
	72
	73	#ifdef __GNUC__
	74
	75	#define __word_swap_int_var(x) \
	76	__extension__ ({ register __uint32_t __X = (x); \
	77	__asm ("rorl $16, %0" : "+r" (__X)); \
	78	__X; })
	79
	80	#ifdef __OPTIMIZE__
	81
	82	#define __word_swap_int_const(x) \
	83	((((x) & 0xffff0000) >> 16) \| \
	84	(((x) & 0x0000ffff) << 16))
	85	#define __word_swap_int(x) (__builtin_constant_p(x) ? \
	86	__word_swap_int_const(x) : __word_swap_int_var(x))
	87
	88	#else /* __OPTIMIZE__ */
	89
	90	#define __word_swap_int(x) __word_swap_int_var(x)
	91
	92	#endif /* __OPTIMIZE__ */
	93
	94	#define __byte_swap_int_var(x) \
	95	__extension__ ({ register __uint32_t __X = (x); \
	96	__asm ("bswap %0" : "+r" (__X)); \
	97	__X; })
	98
99	#ifdef __OPTIMIZE__
100
101	#define __byte_swap_int_const(x) \
102	((((x) & 0xff000000) >> 24) \| \
103	(((x) & 0x00ff0000) >> 8) \| \
104	(((x) & 0x0000ff00) << 8) \| \
105	(((x) & 0x000000ff) << 24))
106	#define __byte_swap_int(x) (__builtin_constant_p(x) ? \
107	__byte_swap_int_const(x) : __byte_swap_int_var(x))
108
109	#else /* __OPTIMIZE__ */
110
111	#define __byte_swap_int(x) __byte_swap_int_var(x)
112
113	#endif /* __OPTIMIZE__ */
114
115	#define __byte_swap_long_var(x) \
116	__extension__ ({ register __uint64_t __X = (x); \
117	__asm ("bswap %0" : "+r" (__X)); \
118	__X; })
119
fc3f9779 SS	120	#define __byte_swap_long_const(x) \
	121	(((x >> 56) \| \
	122	((x >> 40) & 0xff00) \| \
	123	((x >> 24) & 0xff0000) \| \
	124	((x >> 8) & 0xff000000) \| \
be7ac6b8 MD	125	((x << 8) & ((__uint64_t)0xff << 32)) \| \
	126	((x << 24) & ((__uint64_t)0xff << 40)) \| \
	127	((x << 40) & ((__uint64_t)0xff << 48)) \| \
fc3f9779 SS	128	((x << 56))))
fc3f9779 SS	129
be7ac6b8	130	#ifdef __i386__
fc3f9779	131
be7ac6b8	132	#define __byte_swap_long(x) __byte_swap_long_const(x)
fc3f9779	133
be7ac6b8	134	#else
fc3f9779	135
be7ac6b8 MD	136	#ifdef __OPTIMIZE__
	137	#define __byte_swap_long(x) (__builtin_constant_p(x) ? \
	138	__byte_swap_long_const(x) : __byte_swap_long_var(x))
	139	#else /* __OPTIMIZE__ */
	140	#define __byte_swap_long(x) __byte_swap_long_var(x)
fc3f9779 SS	141	#endif /* __OPTIMIZE__ */
fc3f9779 SS	142
be7ac6b8 MD	143	#endif /* __i386__ */
be7ac6b8 MD	144
fc3f9779 SS	145	#define __byte_swap_word_var(x) \
	146	__extension__ ({ register __uint16_t __X = (x); \
	147	__asm ("xchgb %h0, %b0" : "+Q" (__X)); \
	148	__X; })
	149
	150	#ifdef __OPTIMIZE__
	151
	152	#define __byte_swap_word_const(x) \
	153	((((x) & 0xff00) >> 8) \| \
	154	(((x) & 0x00ff) << 8))
	155
	156	#define __byte_swap_word(x) (__builtin_constant_p(x) ? \
	157	__byte_swap_word_const(x) : __byte_swap_word_var(x))
	158
	159	#else /* __OPTIMIZE__ */
	160
	161	#define __byte_swap_word(x) __byte_swap_word_var(x)
	162
	163	#endif /* __OPTIMIZE__ */
	164
	165	static __inline __uint64_t
	166	__bswap64(__uint64_t _x)
	167	{
	168
	169	return (__byte_swap_long(_x));
	170	}
	171
	172	static __inline __uint32_t
	173	__bswap32(__uint32_t _x)
	174	{
	175
	176	return (__byte_swap_int(_x));
	177	}
	178
	179	static __inline __uint16_t
	180	__bswap16(__uint16_t _x)
	181	{
	182
	183	return (__byte_swap_word(_x));
	184	}
	185
	186	#define __htonl(x) __bswap32(x)
	187	#define __htons(x) __bswap16(x)
	188	#define __ntohl(x) __bswap32(x)
	189	#define __ntohs(x) __bswap16(x)
	190
	191	#else /* !__GNUC__ */
	192
	193	/*
	194	* No optimizations are available for this compiler. Fall back to
	195	* non-optimized functions by defining the constant usually used to prevent
	196	* redefinition.
	197	*/
	198	#define _BYTEORDER_FUNC_DEFINED
	199
	200	#endif /* __GNUC__ */
	201
	202	#endif /* !_CPU_ENDIAN_H_ */