10b57cec5SDimitry Andric //===-- int_endianness.h - configuration header for compiler-rt -----------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file is a configuration header for compiler-rt. 100b57cec5SDimitry Andric // This file is not part of the interface of this library. 110b57cec5SDimitry Andric // 120b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric #ifndef INT_ENDIANNESS_H 150b57cec5SDimitry Andric #define INT_ENDIANNESS_H 160b57cec5SDimitry Andric 170b57cec5SDimitry Andric #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ 180b57cec5SDimitry Andric defined(__ORDER_LITTLE_ENDIAN__) 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric // Clang and GCC provide built-in endianness definitions. 210b57cec5SDimitry Andric #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 220b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 0 230b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 1 240b57cec5SDimitry Andric #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 250b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 1 260b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 0 270b57cec5SDimitry Andric #endif // __BYTE_ORDER__ 280b57cec5SDimitry Andric 290b57cec5SDimitry Andric #else // Compilers other than Clang or GCC. 300b57cec5SDimitry Andric 310b57cec5SDimitry Andric #if defined(__SVR4) && defined(__sun) 320b57cec5SDimitry Andric #include <sys/byteorder.h> 330b57cec5SDimitry Andric 340b57cec5SDimitry Andric #if defined(_BIG_ENDIAN) 350b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 0 360b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 1 370b57cec5SDimitry Andric #elif defined(_LITTLE_ENDIAN) 380b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 1 390b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 0 400b57cec5SDimitry Andric #else // !_LITTLE_ENDIAN 410b57cec5SDimitry Andric #error "unknown endianness" 420b57cec5SDimitry Andric #endif // !_LITTLE_ENDIAN 430b57cec5SDimitry Andric 44*81ad6265SDimitry Andric #endif // Solaris 450b57cec5SDimitry Andric 460b57cec5SDimitry Andric // .. 470b57cec5SDimitry Andric 480b57cec5SDimitry Andric #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \ 490b57cec5SDimitry Andric defined(__minix) 500b57cec5SDimitry Andric #include <sys/endian.h> 510b57cec5SDimitry Andric 520b57cec5SDimitry Andric #if _BYTE_ORDER == _BIG_ENDIAN 530b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 0 540b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 1 550b57cec5SDimitry Andric #elif _BYTE_ORDER == _LITTLE_ENDIAN 560b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 1 570b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 0 580b57cec5SDimitry Andric #endif // _BYTE_ORDER 590b57cec5SDimitry Andric 600b57cec5SDimitry Andric #endif // *BSD 610b57cec5SDimitry Andric 620b57cec5SDimitry Andric #if defined(__OpenBSD__) 630b57cec5SDimitry Andric #include <machine/endian.h> 640b57cec5SDimitry Andric 650b57cec5SDimitry Andric #if _BYTE_ORDER == _BIG_ENDIAN 660b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 0 670b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 1 680b57cec5SDimitry Andric #elif _BYTE_ORDER == _LITTLE_ENDIAN 690b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 1 700b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 0 710b57cec5SDimitry Andric #endif // _BYTE_ORDER 720b57cec5SDimitry Andric 730b57cec5SDimitry Andric #endif // OpenBSD 740b57cec5SDimitry Andric 750b57cec5SDimitry Andric // .. 760b57cec5SDimitry Andric 770b57cec5SDimitry Andric // Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the 780b57cec5SDimitry Andric // compiler (at least with GCC) 790b57cec5SDimitry Andric #if defined(__APPLE__) || defined(__ellcc__) 800b57cec5SDimitry Andric 810b57cec5SDimitry Andric #ifdef __BIG_ENDIAN__ 820b57cec5SDimitry Andric #if __BIG_ENDIAN__ 830b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 0 840b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 1 850b57cec5SDimitry Andric #endif 860b57cec5SDimitry Andric #endif // __BIG_ENDIAN__ 870b57cec5SDimitry Andric 880b57cec5SDimitry Andric #ifdef __LITTLE_ENDIAN__ 890b57cec5SDimitry Andric #if __LITTLE_ENDIAN__ 900b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 1 910b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 0 920b57cec5SDimitry Andric #endif 930b57cec5SDimitry Andric #endif // __LITTLE_ENDIAN__ 940b57cec5SDimitry Andric 950b57cec5SDimitry Andric #endif // Mac OSX 960b57cec5SDimitry Andric 970b57cec5SDimitry Andric // .. 980b57cec5SDimitry Andric 990b57cec5SDimitry Andric #if defined(_WIN32) 1000b57cec5SDimitry Andric 1010b57cec5SDimitry Andric #define _YUGA_LITTLE_ENDIAN 1 1020b57cec5SDimitry Andric #define _YUGA_BIG_ENDIAN 0 1030b57cec5SDimitry Andric 1040b57cec5SDimitry Andric #endif // Windows 1050b57cec5SDimitry Andric 1060b57cec5SDimitry Andric #endif // Clang or GCC. 1070b57cec5SDimitry Andric 1080b57cec5SDimitry Andric // . 1090b57cec5SDimitry Andric 1100b57cec5SDimitry Andric #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) 1110b57cec5SDimitry Andric #error Unable to determine endian 1120b57cec5SDimitry Andric #endif // Check we found an endianness correctly. 1130b57cec5SDimitry Andric 1140b57cec5SDimitry Andric #endif // INT_ENDIANNESS_H 115