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| /* ===-- endianness.h - configuration header for libgcc replacement --------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
* ===----------------------------------------------------------------------===
*
* This file is a configuration header for libgcc replacement.
* This file is not part of the interface of this library.
*
* ===----------------------------------------------------------------------===
*/
#ifndef ENDIANNESS_H
#define ENDIANNESS_H
/*
* Known limitations:
* Middle endian systems are not handled currently.
*/
#if defined(__SVR4) && defined(__sun)
#include <sys/byteorder.h>
#if _BYTE_ORDER == _BIG_ENDIAN
#define _YUGA_LITTLE_ENDIAN 0
#define _YUGA_BIG_ENDIAN 1
#elif _BYTE_ORDER == _LITTLE_ENDIAN
#define _YUGA_LITTLE_ENDIAN 1
#define _YUGA_BIG_ENDIAN 0
#endif /* _BYTE_ORDER */
#endif /* Solaris and AuroraUX. */
/* .. */
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonflyBSD__) || defined(__minix)
#include <sys/endian.h>
#if _BYTE_ORDER == _BIG_ENDIAN
#define _YUGA_LITTLE_ENDIAN 0
#define _YUGA_BIG_ENDIAN 1
#elif _BYTE_ORDER == _LITTLE_ENDIAN
#define _YUGA_LITTLE_ENDIAN 1
#define _YUGA_BIG_ENDIAN 0
#endif /* _BYTE_ORDER */
#endif /* *BSD */
/* .. */
#if defined(__OpenBSD__)
#include <machine/endian.h>
#if _BYTE_ORDER == _BIG_ENDIAN
#define _YUGA_LITTLE_ENDIAN 0
#define _YUGA_BIG_ENDIAN 1
#elif _BYTE_ORDER == _LITTLE_ENDIAN
#define _YUGA_LITTLE_ENDIAN 1
#define _YUGA_BIG_ENDIAN 0
#endif /* _BYTE_ORDER */
#endif /* OpenBSD */
/* .. */
/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */
#if defined(__APPLE__) && defined(__MACH__) || defined(__ellcc__ )
#ifdef __BIG_ENDIAN__
#if __BIG_ENDIAN__
#define _YUGA_LITTLE_ENDIAN 0
#define _YUGA_BIG_ENDIAN 1
#endif
#endif /* __BIG_ENDIAN__ */
#ifdef __LITTLE_ENDIAN__
#if __LITTLE_ENDIAN__
#define _YUGA_LITTLE_ENDIAN 1
#define _YUGA_BIG_ENDIAN 0
#endif
#endif /* __LITTLE_ENDIAN__ */
#endif /* Mac OSX */
/* .. */
#if defined(__linux__)
#include <endian.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define _YUGA_LITTLE_ENDIAN 0
#define _YUGA_BIG_ENDIAN 1
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#define _YUGA_LITTLE_ENDIAN 1
#define _YUGA_BIG_ENDIAN 0
#endif /* __BYTE_ORDER */
#endif /* GNU/Linux */
/* . */
#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
#error Unable to determine endian
#endif /* Check we found an endianness correctly. */
#endif /* ENDIANNESS_H */
|