1/* ===-- int_endianness.h - configuration header for compiler-rt ------------===
2 *
3 *		       The LLVM Compiler Infrastructure
4 *
5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
7 *
8 * ===----------------------------------------------------------------------===
9 *
10 * This file is a configuration header for compiler-rt.
11 * This file is not part of the interface of this library.
12 *
13 * ===----------------------------------------------------------------------===
14 */
15
16#ifndef INT_ENDIANNESS_H
17#define INT_ENDIANNESS_H
18
19#if defined(__SVR4) && defined(__sun)
20#include <sys/byteorder.h>
21
22#if defined(_BIG_ENDIAN)
23#define _YUGA_LITTLE_ENDIAN 0
24#define _YUGA_BIG_ENDIAN    1
25#elif defined(_LITTLE_ENDIAN)
26#define _YUGA_LITTLE_ENDIAN 1
27#define _YUGA_BIG_ENDIAN    0
28#else /* !_LITTLE_ENDIAN */
29#error "unknown endianness"
30#endif /* !_LITTLE_ENDIAN */
31
32#endif /* Solaris and AuroraUX. */
33
34/* .. */
35
36#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__minix)
37#include <sys/endian.h>
38
39#if _BYTE_ORDER == _BIG_ENDIAN
40#define _YUGA_LITTLE_ENDIAN 0
41#define _YUGA_BIG_ENDIAN    1
42#elif _BYTE_ORDER == _LITTLE_ENDIAN
43#define _YUGA_LITTLE_ENDIAN 1
44#define _YUGA_BIG_ENDIAN    0
45#endif /* _BYTE_ORDER */
46
47#endif /* *BSD */
48
49#if defined(__OpenBSD__) || defined(__Bitrig__)
50#include <machine/endian.h>
51
52#if _BYTE_ORDER == _BIG_ENDIAN
53#define _YUGA_LITTLE_ENDIAN 0
54#define _YUGA_BIG_ENDIAN    1
55#elif _BYTE_ORDER == _LITTLE_ENDIAN
56#define _YUGA_LITTLE_ENDIAN 1
57#define _YUGA_BIG_ENDIAN    0
58#endif /* _BYTE_ORDER */
59
60#endif /* OpenBSD and Bitrig. */
61
62/* .. */
63
64/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */
65#if defined(__APPLE__) || defined(__ellcc__ )
66
67#ifdef __BIG_ENDIAN__
68#if __BIG_ENDIAN__
69#define _YUGA_LITTLE_ENDIAN 0
70#define _YUGA_BIG_ENDIAN    1
71#endif
72#endif /* __BIG_ENDIAN__ */
73
74#ifdef __LITTLE_ENDIAN__
75#if __LITTLE_ENDIAN__
76#define _YUGA_LITTLE_ENDIAN 1
77#define _YUGA_BIG_ENDIAN    0
78#endif
79#endif /* __LITTLE_ENDIAN__ */
80
81#endif /* Mac OSX */
82
83/* .. */
84
85#if defined(__linux__)
86#include <endian.h>
87
88#if __BYTE_ORDER == __BIG_ENDIAN
89#define _YUGA_LITTLE_ENDIAN 0
90#define _YUGA_BIG_ENDIAN    1
91#elif __BYTE_ORDER == __LITTLE_ENDIAN
92#define _YUGA_LITTLE_ENDIAN 1
93#define _YUGA_BIG_ENDIAN    0
94#endif /* __BYTE_ORDER */
95
96#endif /* GNU/Linux */
97
98#if defined(_WIN32)
99
100#define _YUGA_LITTLE_ENDIAN 1
101#define _YUGA_BIG_ENDIAN    0
102
103#endif /* Windows */
104
105/* . */
106
107#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
108#error Unable to determine endian
109#endif /* Check we found an endianness correctly. */
110
111#endif /* INT_ENDIANNESS_H */
112