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wine-mirror
GitHub Repository: wine-mirror/wine
 Path: blob/master/libs/compiler-rt/lib/builtins/int_endianness.h
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/* ===-- int_endianness.h - configuration header for compiler-rt ------------===

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 *

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 *		       The LLVM Compiler Infrastructure

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 *

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 * This file is dual licensed under the MIT and the University of Illinois Open

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 * Source Licenses. See LICENSE.TXT for details.

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 *

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 * ===----------------------------------------------------------------------===

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 *

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 * This file is a configuration header for compiler-rt.

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 * This file is not part of the interface of this library.

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 *

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 * ===----------------------------------------------------------------------===

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 */

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#ifndef INT_ENDIANNESS_H

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#define INT_ENDIANNESS_H

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#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \

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    defined(__ORDER_LITTLE_ENDIAN__)

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/* Clang and GCC provide built-in endianness definitions. */

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#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__

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#define _YUGA_LITTLE_ENDIAN 0

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#define _YUGA_BIG_ENDIAN    1

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#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__

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#define _YUGA_LITTLE_ENDIAN 1

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#define _YUGA_BIG_ENDIAN    0

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#endif /* __BYTE_ORDER__ */

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#else /* Compilers other than Clang or GCC. */

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#if defined(__SVR4) && defined(__sun)

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#include <sys/byteorder.h>

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#if defined(_BIG_ENDIAN)

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#define _YUGA_LITTLE_ENDIAN 0

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#define _YUGA_BIG_ENDIAN    1

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#elif defined(_LITTLE_ENDIAN)

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#define _YUGA_LITTLE_ENDIAN 1

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#define _YUGA_BIG_ENDIAN    0

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#else /* !_LITTLE_ENDIAN */

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#error "unknown endianness"

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#endif /* !_LITTLE_ENDIAN */

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#endif /* Solaris and AuroraUX. */

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/* .. */

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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) ||   \

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    defined(__minix)

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#include <sys/endian.h>

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#if _BYTE_ORDER == _BIG_ENDIAN

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#define _YUGA_LITTLE_ENDIAN 0

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#define _YUGA_BIG_ENDIAN    1

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#elif _BYTE_ORDER == _LITTLE_ENDIAN

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#define _YUGA_LITTLE_ENDIAN 1

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#define _YUGA_BIG_ENDIAN    0

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#endif /* _BYTE_ORDER */

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#endif /* *BSD */

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#if defined(__OpenBSD__)

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#include <machine/endian.h>

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#if _BYTE_ORDER == _BIG_ENDIAN

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#define _YUGA_LITTLE_ENDIAN 0

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#define _YUGA_BIG_ENDIAN    1

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#elif _BYTE_ORDER == _LITTLE_ENDIAN

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#define _YUGA_LITTLE_ENDIAN 1

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#define _YUGA_BIG_ENDIAN    0

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#endif /* _BYTE_ORDER */

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#endif /* OpenBSD */

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/* .. */

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/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the

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 * compiler (at least with GCC) */

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#if defined(__APPLE__) || defined(__ellcc__ )

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#ifdef __BIG_ENDIAN__

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#if __BIG_ENDIAN__

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#define _YUGA_LITTLE_ENDIAN 0

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#define _YUGA_BIG_ENDIAN    1

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#endif

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#endif /* __BIG_ENDIAN__ */

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#ifdef __LITTLE_ENDIAN__

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#if __LITTLE_ENDIAN__

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#define _YUGA_LITTLE_ENDIAN 1

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#define _YUGA_BIG_ENDIAN    0

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#endif

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#endif /* __LITTLE_ENDIAN__ */

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#endif /* Mac OSX */

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/* .. */

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#if defined(_WIN32)

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#define _YUGA_LITTLE_ENDIAN 1

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#define _YUGA_BIG_ENDIAN    0

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#endif /* Windows */

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#endif /* Clang or GCC. */

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/* . */

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#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)

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#error Unable to determine endian

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#endif /* Check we found an endianness correctly. */

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#endif /* INT_ENDIANNESS_H */

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