arch/generic/sysendian.h

/*
 *      PearPC
 *      sysendian.h
 *
 *      Copyright (C) 1999-2004 Stefan Weyergraf
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 *
 *      This program is distributed in the hope that it will 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 to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__
#define __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__

#include "system/types.h"
#include "config.h"

static inline FUNCTION_CONST uint32 ppc_bswap_word(uint32 data)
{
        return (data>>24)|((data>>8)&0xff00)|((data<<8)&0xff0000)|(data<<24);
}

static inline FUNCTION_CONST uint64 ppc_bswap_dword(uint64 data)
{
        return (((uint64)ppc_bswap_word(data)) << 32) | (uint64)ppc_bswap_word(data >> 32);
}

static inline FUNCTION_CONST uint16 ppc_bswap_half(uint16 data)
{
        return (data<<8)|(data>>8);
}

#if HOST_ENDIANESS == HOST_ENDIANESS_LE

/*
 *              Little-endian machine
 */

#       define ppc_dword_from_BE(data)  (ppc_bswap_dword(data))
#       define ppc_word_from_BE(data)   (ppc_bswap_word(data))
#       define ppc_half_from_BE(data)   (ppc_bswap_half(data))

#       define ppc_dword_from_LE(data)  ((uint64)(data))
#       define ppc_word_from_LE(data)   ((uint32)(data))
#       define ppc_half_from_LE(data)   ((uint16)(data))

#       define ppc_dword_to_LE(data)    ppc_dword_from_LE(data)
#       define ppc_word_to_LE(data)     ppc_word_from_LE(data)
#       define ppc_half_to_LE(data)     ppc_half_from_LE(data)

#       define ppc_dword_to_BE(data)    ppc_dword_from_BE(data)
#       define ppc_word_to_BE(data)     ppc_word_from_BE(data)
#       define ppc_half_to_BE(data)     ppc_half_from_BE(data)

#elif HOST_ENDIANESS == HOST_ENDIANESS_BE

/*
 *              Big-endian machine
 */
#       define ppc_dword_from_BE(data)  ((uint64)(data))
#       define ppc_word_from_BE(data)   ((uint32)(data))
#       define ppc_half_from_BE(data)   ((uint16)(data))

#       define ppc_dword_from_LE(data)  (ppc_bswap_dword(data))
#       define ppc_word_from_LE(data)   (ppc_bswap_word(data))
#       define ppc_half_from_LE(data)   (ppc_bswap_half(data))

#       define ppc_dword_to_LE(data)    ppc_dword_from_LE(data)
#       define ppc_word_to_LE(data)     ppc_word_from_LE(data)
#       define ppc_half_to_LE(data)     ppc_half_from_LE(data)

#       define ppc_dword_to_BE(data)    ppc_dword_from_BE(data)
#       define ppc_word_to_BE(data)     ppc_word_from_BE(data)
#       define ppc_half_to_BE(data)     ppc_half_from_BE(data)

#else

/*
 *              Weird-endian machine
 *      HOST_ENDIANESS is neither little- nor big-endian?
 */
#       error "What kind of a weird machine do you have? It's neither little- nor big-endian??? This is unsupported."

#endif

#endif
1	dpavlin	1	/*
2			* PearPC
3			* sysendian.h
4			*
5			* Copyright (C) 1999-2004 Stefan Weyergraf
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License version 2 as
9			* published by the Free Software Foundation.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19			*/
20
21			#ifndef __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__
22			#define __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__
23
24			#include "system/types.h"
25			#include "config.h"
26
27			static inline FUNCTION_CONST uint32 ppc_bswap_word(uint32 data)
28			{
29			return (data>>24)\|((data>>8)&0xff00)\|((data<<8)&0xff0000)\|(data<<24);
30			}
31
32			static inline FUNCTION_CONST uint64 ppc_bswap_dword(uint64 data)
33			{
34			return (((uint64)ppc_bswap_word(data)) << 32) \| (uint64)ppc_bswap_word(data >> 32);
35			}
36
37			static inline FUNCTION_CONST uint16 ppc_bswap_half(uint16 data)
38			{
39			return (data<<8)\|(data>>8);
40			}
41
42			#if HOST_ENDIANESS == HOST_ENDIANESS_LE
43
44			/*
45			* Little-endian machine
46			*/
47
48			# define ppc_dword_from_BE(data) (ppc_bswap_dword(data))
49			# define ppc_word_from_BE(data) (ppc_bswap_word(data))
50			# define ppc_half_from_BE(data) (ppc_bswap_half(data))
51
52			# define ppc_dword_from_LE(data) ((uint64)(data))
53			# define ppc_word_from_LE(data) ((uint32)(data))
54			# define ppc_half_from_LE(data) ((uint16)(data))
55
56			# define ppc_dword_to_LE(data) ppc_dword_from_LE(data)
57			# define ppc_word_to_LE(data) ppc_word_from_LE(data)
58			# define ppc_half_to_LE(data) ppc_half_from_LE(data)
59
60			# define ppc_dword_to_BE(data) ppc_dword_from_BE(data)
61			# define ppc_word_to_BE(data) ppc_word_from_BE(data)
62			# define ppc_half_to_BE(data) ppc_half_from_BE(data)
63
64			#elif HOST_ENDIANESS == HOST_ENDIANESS_BE
65
66			/*
67			* Big-endian machine
68			*/
69			# define ppc_dword_from_BE(data) ((uint64)(data))
70			# define ppc_word_from_BE(data) ((uint32)(data))
71			# define ppc_half_from_BE(data) ((uint16)(data))
72
73			# define ppc_dword_from_LE(data) (ppc_bswap_dword(data))
74			# define ppc_word_from_LE(data) (ppc_bswap_word(data))
75			# define ppc_half_from_LE(data) (ppc_bswap_half(data))
76
77			# define ppc_dword_to_LE(data) ppc_dword_from_LE(data)
78			# define ppc_word_to_LE(data) ppc_word_from_LE(data)
79			# define ppc_half_to_LE(data) ppc_half_from_LE(data)
80
81			# define ppc_dword_to_BE(data) ppc_dword_from_BE(data)
82			# define ppc_word_to_BE(data) ppc_word_from_BE(data)
83			# define ppc_half_to_BE(data) ppc_half_from_BE(data)
84
85			#else
86
87			/*
88			* Weird-endian machine
89			* HOST_ENDIANESS is neither little- nor big-endian?
90			*/
91			# error "What kind of a weird machine do you have? It's neither little- nor big-endian??? This is unsupported."
92
93			#endif
94
95			#endif