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gerrit-public.fairphone.software / toolchain / llvm-project / e85b06d65f695c576df1e529ee37cb15e6902401 / . / compiler-rt / lib / builtins / int_endianness.h
blob: e2586c56bac884908a2c00c985f5951c9323a7a7 [file] [log] [blame]
Daniel Dunbarcc675f42011-11-15 18:56:21 +0000[diff] [blame]1/* ===-- int_endianness.h - configuration header for compiler-rt ------------===
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]2 *
3 * The LLVM Compiler Infrastructure
4 *
Howard Hinnant5b791f62010-11-16 22:13:33 +0000[diff] [blame]5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]7 *
8 * ===----------------------------------------------------------------------===
9 *
Daniel Dunbar24768732009-10-27 17:48:46 +0000[diff] [blame]10 * This file is a configuration header for compiler-rt.
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]11 * This file is not part of the interface of this library.
12 *
13 * ===----------------------------------------------------------------------===
14 */
15
Daniel Dunbarcc675f42011-11-15 18:56:21 +0000[diff] [blame]16#ifndef INT_ENDIANNESS_H
17#define INT_ENDIANNESS_H
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]18
Ed Schoutenf6d492e2015-02-23 09:27:49 +0000[diff] [blame]19#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
20 defined(__ORDER_LITTLE_ENDIAN__)
21
22/* Clang and GCC provide built-in endianness definitions. */
23#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
24#define _YUGA_LITTLE_ENDIAN 0
25#define _YUGA_BIG_ENDIAN 1
26#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
27#define _YUGA_LITTLE_ENDIAN 1
28#define _YUGA_BIG_ENDIAN 0
29#endif /* __BYTE_ORDER__ */
30
31#else /* Compilers other than Clang or GCC. */
32
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]33#if defined(__SVR4) && defined(__sun)
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]34#include <sys/byteorder.h>
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]35
Joerg Sonnenberger9dce2692013-08-17 22:32:10 +0000[diff] [blame]36#if defined(_BIG_ENDIAN)
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]37#define _YUGA_LITTLE_ENDIAN 0
38#define _YUGA_BIG_ENDIAN 1
Joerg Sonnenberger9dce2692013-08-17 22:32:10 +0000[diff] [blame]39#elif defined(_LITTLE_ENDIAN)
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]40#define _YUGA_LITTLE_ENDIAN 1
41#define _YUGA_BIG_ENDIAN 0
Joerg Sonnenberger9dce2692013-08-17 22:32:10 +0000[diff] [blame]42#else /* !_LITTLE_ENDIAN */
43#error "unknown endianness"
44#endif /* !_LITTLE_ENDIAN */
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]45
46#endif /* Solaris and AuroraUX. */
47
48/* .. */
49
Saleem Abdulrasool8bf8409b2014-09-19 01:35:08 +0000[diff] [blame]50#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
51 defined(__minix)
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]52#include <sys/endian.h>
53
54#if _BYTE_ORDER == _BIG_ENDIAN
55#define _YUGA_LITTLE_ENDIAN 0
56#define _YUGA_BIG_ENDIAN 1
57#elif _BYTE_ORDER == _LITTLE_ENDIAN
58#define _YUGA_LITTLE_ENDIAN 1
59#define _YUGA_BIG_ENDIAN 0
60#endif /* _BYTE_ORDER */
61
62#endif /* *BSD */
63
Erich Keanea0217432017-07-21 22:47:46 +0000[diff] [blame]64#if defined(__OpenBSD__)
Eric Christopher8539af72012-09-20 06:19:20 +0000[diff] [blame]65#include <machine/endian.h>
66
67#if _BYTE_ORDER == _BIG_ENDIAN
68#define _YUGA_LITTLE_ENDIAN 0
69#define _YUGA_BIG_ENDIAN 1
70#elif _BYTE_ORDER == _LITTLE_ENDIAN
71#define _YUGA_LITTLE_ENDIAN 1
72#define _YUGA_BIG_ENDIAN 0
73#endif /* _BYTE_ORDER */
74
Erich Keanea0217432017-07-21 22:47:46 +0000[diff] [blame]75#endif /* OpenBSD */
Eric Christopher8539af72012-09-20 06:19:20 +0000[diff] [blame]76
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]77/* .. */
78
Saleem Abdulrasool8bf8409b2014-09-19 01:35:08 +0000[diff] [blame]79/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the
80 * compiler (at least with GCC) */
Tim Northoverbea1caf2014-01-21 12:38:02 +0000[diff] [blame]81#if defined(__APPLE__) || defined(__ellcc__ )
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]82
83#ifdef __BIG_ENDIAN__
84#if __BIG_ENDIAN__
85#define _YUGA_LITTLE_ENDIAN 0
86#define _YUGA_BIG_ENDIAN 1
87#endif
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]88#endif /* __BIG_ENDIAN__ */
89
90#ifdef __LITTLE_ENDIAN__
91#if __LITTLE_ENDIAN__
92#define _YUGA_LITTLE_ENDIAN 1
93#define _YUGA_BIG_ENDIAN 0
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]94#endif
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]95#endif /* __LITTLE_ENDIAN__ */
96
97#endif /* Mac OSX */
98
99/* .. */
100
Anton Korobeynikov48cfd552012-01-12 21:13:48 +0000[diff] [blame]101#if defined(_WIN32)
102
103#define _YUGA_LITTLE_ENDIAN 1
104#define _YUGA_BIG_ENDIAN 0
105
106#endif /* Windows */
107
Ed Schoutenf6d492e2015-02-23 09:27:49 +0000[diff] [blame]108#endif /* Clang or GCC. */
109
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]110/* . */
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]111
112#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
Edward O'Callaghan032ab6f2009-08-08 02:31:50 +0000[diff] [blame]113#error Unable to determine endian
114#endif /* Check we found an endianness correctly. */
Edward O'Callaghandabf71f2009-08-05 19:06:50 +0000[diff] [blame]115
Daniel Dunbarcc675f42011-11-15 18:56:21 +0000[diff] [blame]116#endif /* INT_ENDIANNESS_H */