hwsec-optee-ta/builtin/endian.h

// Copyright 2023 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef HWSEC_OPTEE_TA_BUILTIN_ENDIAN_H_
#define HWSEC_OPTEE_TA_BUILTIN_ENDIAN_H_

#include <stdint.h>

/*
 * Functions to convert byte order in various sized big endian integers to
 * host byte order. Note that the code currently does not require functions
 * for converting little endian integers.
 */
#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)

static inline uint16_t be16toh(uint16_t in) {
  return __builtin_bswap16(in);
}
static inline uint32_t be32toh(uint32_t in) {
  return __builtin_bswap32(in);
}
static inline uint64_t be64toh(uint64_t in) {
  return __builtin_bswap64(in);
}

#define htobe16 be16toh
#define htobe32 be32toh
#define htobe64 be64toh

#define htole16(x) (uint16_t)(x)
#define htole32(x) (uint32_t)(x)
#define htole64(x) (uint64_t)(x)

#endif  // __BYTE_ORDER__  == __ORDER_LITTLE_ENDIAN__

#endif  // HWSEC_OPTEE_TA_BUILTIN_ENDIAN_H_