1
/* ===-- int_endianness.h - configuration header for compiler-rt ------------===
3
* The LLVM Compiler Infrastructure
5
* This file is dual licensed under the MIT and the University of Illinois Open
6
* Source Licenses. See LICENSE.TXT for details.
8
* ===----------------------------------------------------------------------===
10
* This file is a configuration header for compiler-rt.
11
* This file is not part of the interface of this library.
13
* ===----------------------------------------------------------------------===
16
#ifndef INT_ENDIANNESS_H
17
#define INT_ENDIANNESS_H
19
#if defined(__SVR4) && defined(__sun)
20
#include <sys/byteorder.h>
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 */
30
#endif /* Solaris and AuroraUX. */
34
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__minix)
35
#include <sys/endian.h>
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 */
47
#if defined(__OpenBSD__) || defined(__Bitrig__)
48
#include <machine/endian.h>
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 */
58
#endif /* OpenBSD and Bitrig. */
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__ )
67
#define _YUGA_LITTLE_ENDIAN 0
68
#define _YUGA_BIG_ENDIAN 1
70
#endif /* __BIG_ENDIAN__ */
72
#ifdef __LITTLE_ENDIAN__
74
#define _YUGA_LITTLE_ENDIAN 1
75
#define _YUGA_BIG_ENDIAN 0
77
#endif /* __LITTLE_ENDIAN__ */
83
#if defined(__linux__)
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 */
94
#endif /* GNU/Linux */
98
#define _YUGA_LITTLE_ENDIAN 1
99
#define _YUGA_BIG_ENDIAN 0
103
#if defined(EMSCRIPTEN)
105
#define _YUGA_LITTLE_ENDIAN 1
106
#define _YUGA_BIG_ENDIAN 0
108
#endif /* emscripten */
112
#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
113
#error Unable to determine endian
114
#endif /* Check we found an endianness correctly. */
116
#endif /* INT_ENDIANNESS_H */