| //===-- int_endianness.h - configuration header for compiler-rt -----------===// |
| // |
| // 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 compiler-rt. |
| // This file is not part of the interface of this library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef INT_ENDIANNESS_H |
| #define INT_ENDIANNESS_H |
| |
| #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ |
| defined(__ORDER_LITTLE_ENDIAN__) |
| |
| // Clang and GCC provide built-in endianness definitions. |
| #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
| #define _YUGA_LITTLE_ENDIAN 0 |
| #define _YUGA_BIG_ENDIAN 1 |
| #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| #define _YUGA_LITTLE_ENDIAN 1 |
| #define _YUGA_BIG_ENDIAN 0 |
| #endif // __BYTE_ORDER__ |
| |
| #else // Compilers other than Clang or GCC. |
| |
| #if defined(__SVR4) && defined(__sun) |
| #include <sys/byteorder.h> |
| |
| #if defined(_BIG_ENDIAN) |
| #define _YUGA_LITTLE_ENDIAN 0 |
| #define _YUGA_BIG_ENDIAN 1 |
| #elif defined(_LITTLE_ENDIAN) |
| #define _YUGA_LITTLE_ENDIAN 1 |
| #define _YUGA_BIG_ENDIAN 0 |
| #else // !_LITTLE_ENDIAN |
| #error "unknown endianness" |
| #endif // !_LITTLE_ENDIAN |
| |
| #endif // Solaris and AuroraUX. |
| |
| // .. |
| |
| #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \ |
| 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(__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(_WIN32) |
| |
| #define _YUGA_LITTLE_ENDIAN 1 |
| #define _YUGA_BIG_ENDIAN 0 |
| |
| #endif // Windows |
| |
| #endif // Clang or GCC. |
| |
| // . |
| |
| #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) |
| #error Unable to determine endian |
| #endif // Check we found an endianness correctly. |
| |
| #endif // INT_ENDIANNESS_H |