/*
 *   BSD LICENSE
 *
 *   Copyright(c) 2015 RehiveTech. All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of RehiveTech nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _RTE_BYTEORDER_ARM_H_
#define _RTE_BYTEORDER_ARM_H_

#ifndef RTE_FORCE_INTRINSICS
#  error Platform must be built with CONFIG_RTE_FORCE_INTRINSICS
#endif

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <rte_common.h>
#include "generic/rte_byteorder.h"

/* fix missing __builtin_bswap16 for gcc older then 4.8 */
#if !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))

static inline uint16_t rte_arch_bswap16(uint16_t _x)
{
	register uint16_t x = _x;

	asm volatile ("rev16 %0,%1"
		      : "=r" (x)
		      : "r" (x)
		      );
	return x;
}

#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
				   rte_constant_bswap16(x) : \
				   rte_arch_bswap16(x)))
#endif

/* ARM architecture is bi-endian (both big and little). */
#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN

#define rte_cpu_to_le_16(x) (x)
#define rte_cpu_to_le_32(x) (x)
#define rte_cpu_to_le_64(x) (x)

#define rte_cpu_to_be_16(x) rte_bswap16(x)
#define rte_cpu_to_be_32(x) rte_bswap32(x)
#define rte_cpu_to_be_64(x) rte_bswap64(x)

#define rte_le_to_cpu_16(x) (x)
#define rte_le_to_cpu_32(x) (x)
#define rte_le_to_cpu_64(x) (x)

#define rte_be_to_cpu_16(x) rte_bswap16(x)
#define rte_be_to_cpu_32(x) rte_bswap32(x)
#define rte_be_to_cpu_64(x) rte_bswap64(x)

#else /* RTE_BIG_ENDIAN */

#define rte_cpu_to_le_16(x) rte_bswap16(x)
#define rte_cpu_to_le_32(x) rte_bswap32(x)
#define rte_cpu_to_le_64(x) rte_bswap64(x)

#define rte_cpu_to_be_16(x) (x)
#define rte_cpu_to_be_32(x) (x)
#define rte_cpu_to_be_64(x) (x)

#define rte_le_to_cpu_16(x) rte_bswap16(x)
#define rte_le_to_cpu_32(x) rte_bswap32(x)
#define rte_le_to_cpu_64(x) rte_bswap64(x)

#define rte_be_to_cpu_16(x) (x)
#define rte_be_to_cpu_32(x) (x)
#define rte_be_to_cpu_64(x) (x)
#endif

#ifdef __cplusplus
}
#endif

#endif /* _RTE_BYTEORDER_ARM_H_ */