/*
 * Copyright (c) 2020 Institute of Parallel And Distributed Systems (IPADS), Shanghai Jiao Tong University (SJTU)
 * OS-Lab-2020 (i.e., ChCore) is licensed under the Mulan PSL v1.
 * You can use this software according to the terms and conditions of the Mulan PSL v1.
 * You may obtain a copy of Mulan PSL v1 at:
 *   http://license.coscl.org.cn/MulanPSL
 *   THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
 *   PURPOSE.
 *   See the Mulan PSL v1 for more details.
 */

#pragma once

#include <lib/type.h>

#define le16_to_cpu(x) (x)
#define le32_to_cpu(x) (x)
#define le64_to_cpu(x) (x)

#define be16_to_cpu(x) ((((x) & 0xff) << 8) | (((x) >> 8) & 0xff))
#define be32_to_cpu(x) ((be16_to_cpu((x)) << 16) | (be16_to_cpu((x) >> 16)))
#define be64_to_cpu(x) ((be32_to_cpu((x)) << 32) | (be32_to_cpu((x) >> 32)))

#define be128ptr_to_cpu_hi(x) (be64_to_cpu(*(u64 *)(x)))
#define be128ptr_to_cpu_lo(x) (be64_to_cpu(*((u64 *)(x) + 1)))

#define be96ptr_to_cpu_hi(x) (be32_to_cpu(*(u32 *)(x)))
#define be96ptr_to_cpu_lo(x) (((u64)(be32_to_cpu(*((u32 *)(x) + 1)))) << 32 | \
			      (be32_to_cpu(*((u32 *)(x)) + 2)))

#define beXptr_to_cpu(bits, n) \
	({ \
	 (bits == 32) ? be32_to_cpu(*(u32 *)(n)) : \
	 (bits == 64) ? be64_to_cpu(*(u64 *)(n)) : \
	 ({ BUG("invalid X"); 0; }); \
	 })

#define set_beXptr_to_cpu(bits, n, hi, lo) do {     \
	if (bits > 64) {                            \
		if (bits == 96) {                   \
			lo = be96ptr_to_cpu_lo(n);  \
			hi = be96ptr_to_cpu_hi(n);  \
		} else if (bits == 128) {           \
			lo = be128ptr_to_cpu_lo(n); \
			hi = be128ptr_to_cpu_hi(n); \
		} else {                            \
			BUG("invalid X");           \
		}                                   \
	} else {                                    \
		lo = 0;                             \
		hi = beXptr_to_cpu(bits, n);        \
	}                                           \
} while (0)