byteorder.h

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/*
 * Copyright (c) 2006-2023, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2023-02-25     GuEe-GUI     the first version
 */
 
#ifndef __BYTEORDER__
#define __BYTEORDER__
 
#ifdef __CHECKER__
#define __bitwise __attribute__((bitwise))
#else
#define __bitwise
#endif
 
typedef rt_uint16_t __bitwise rt_le16_t;
typedef rt_uint32_t __bitwise rt_le32_t;
typedef rt_uint64_t __bitwise rt_le64_t;
typedef rt_uint16_t __bitwise rt_be16_t;
typedef rt_uint32_t __bitwise rt_be32_t;
typedef rt_uint64_t __bitwise rt_be64_t;
 
/* gcc defines __BIG_ENDIAN__ on big endian targets */
#if defined(__BIG_ENDIAN__) || defined(ARCH_CPU_BIG_ENDIAN)
#define rt_cpu_to_be16(x) (x)
#define rt_cpu_to_be32(x) (x)
#define rt_cpu_to_be64(x) (x)
#define rt_be16_to_cpu(x) (x)
#define rt_be32_to_cpu(x) (x)
#define rt_be64_to_cpu(x) (x)
#define rt_le16_to_cpu(x) __builtin_bswap16(x)
#define rt_le32_to_cpu(x) __builtin_bswap32(x)
#define rt_le64_to_cpu(x) __builtin_bswap64(x)
#define rt_cpu_to_le16(x) __builtin_bswap16(x)
#define rt_cpu_to_le32(x) __builtin_bswap32(x)
#define rt_cpu_to_le64(x) __builtin_bswap64(x)
#else
#define rt_cpu_to_be16(x) __builtin_bswap16(x)
#define rt_cpu_to_be32(x) __builtin_bswap32(x)
#define rt_cpu_to_be64(x) __builtin_bswap64(x)
#define rt_be16_to_cpu(x) __builtin_bswap16(x)
#define rt_be32_to_cpu(x) __builtin_bswap32(x)
#define rt_be64_to_cpu(x) __builtin_bswap64(x)
#define rt_le16_to_cpu(x) (x)
#define rt_le32_to_cpu(x) (x)
#define rt_le64_to_cpu(x) (x)
#define rt_cpu_to_le16(x) (x)
#define rt_cpu_to_le32(x) (x)
#define rt_cpu_to_le64(x) (x)
#endif /* __BIG_ENDIAN__ || ARCH_CPU_BIG_ENDIAN */
 
#undef __bitwise
 
#endif /* __BYTEORDER__ */