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 _BYTE_ORDER == _BIG_ENDIAN
23#define _YUGA_LITTLE_ENDIAN 0
24#define _YUGA_BIG_ENDIAN    1
25#elif _BYTE_ORDER == _LITTLE_ENDIAN
26#define _YUGA_LITTLE_ENDIAN 1
27#define _YUGA_BIG_ENDIAN    0
28#endif /* _BYTE_ORDER */
29
30#endif /* Solaris and AuroraUX. */
31
32/* .. */
33
34#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__minix)
35#include <sys/endian.h>
36
37#if _BYTE_ORDER == _BIG_ENDIAN
38#define _YUGA_LITTLE_ENDIAN 0
39#define _YUGA_BIG_ENDIAN    1
40#elif _BYTE_ORDER == _LITTLE_ENDIAN
41#define _YUGA_LITTLE_ENDIAN 1
42#define _YUGA_BIG_ENDIAN    0
43#endif /* _BYTE_ORDER */
44
45#endif /* *BSD */
46
47#if defined(__OpenBSD__) || defined(__Bitrig__)
48#include <machine/endian.h>
49
50#if _BYTE_ORDER == _BIG_ENDIAN
51#define _YUGA_LITTLE_ENDIAN 0
52#define _YUGA_BIG_ENDIAN    1
53#elif _BYTE_ORDER == _LITTLE_ENDIAN
54#define _YUGA_LITTLE_ENDIAN 1
55#define _YUGA_BIG_ENDIAN    0
56#endif /* _BYTE_ORDER */
57
58#endif /* OpenBSD and Bitrig. */
59
60/* .. */
61
62/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */
63#if defined(__APPLE__) && defined(__MACH__) || defined(__ellcc__ )
64
65#ifdef __BIG_ENDIAN__
66#if __BIG_ENDIAN__
67#define _YUGA_LITTLE_ENDIAN 0
68#define _YUGA_BIG_ENDIAN    1
69#endif
70#endif /* __BIG_ENDIAN__ */
71
72#ifdef __LITTLE_ENDIAN__
73#if __LITTLE_ENDIAN__
74#define _YUGA_LITTLE_ENDIAN 1
75#define _YUGA_BIG_ENDIAN    0
76#endif
77#endif /* __LITTLE_ENDIAN__ */
78
79#endif /* Mac OSX */
80
81/* .. */
82
83#if defined(__linux__)
84#include <endian.h>
85
86#if __BYTE_ORDER == __BIG_ENDIAN
87#define _YUGA_LITTLE_ENDIAN 0
88#define _YUGA_BIG_ENDIAN    1
89#elif __BYTE_ORDER == __LITTLE_ENDIAN
90#define _YUGA_LITTLE_ENDIAN 1
91#define _YUGA_BIG_ENDIAN    0
92#endif /* __BYTE_ORDER */
93
94#endif /* GNU/Linux */
95
96#if defined(_WIN32)
97
98#define _YUGA_LITTLE_ENDIAN 1
99#define _YUGA_BIG_ENDIAN    0
100
101#endif /* Windows */
102
103/* . */
104
105#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
106#error Unable to determine endian
107#endif /* Check we found an endianness correctly. */
108
109#endif /* INT_ENDIANNESS_H */
110