/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   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 Intel Corporation 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,
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 *   (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_MEMCPY_H_
#define _RTE_MEMCPY_H_

/**
 * @file
 *
 * Functions for vectorised implementation of memcpy().
 */

/**
 * Copy 16 bytes from one location to another using optimised
 * instructions. The locations should not overlap.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 */
static inline void
rte_mov16(uint8_t *dst, const uint8_t *src);

/**
 * Copy 32 bytes from one location to another using optimised
 * instructions. The locations should not overlap.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 */
static inline void
rte_mov32(uint8_t *dst, const uint8_t *src);

#ifdef __DOXYGEN__

/**
 * Copy 48 bytes from one location to another using optimised
 * instructions. The locations should not overlap.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 */
static inline void
rte_mov48(uint8_t *dst, const uint8_t *src);

#endif /* __DOXYGEN__ */

/**
 * Copy 64 bytes from one location to another using optimised
 * instructions. The locations should not overlap.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 */
static inline void
rte_mov64(uint8_t *dst, const uint8_t *src);

/**
 * Copy 128 bytes from one location to another using optimised
 * instructions. The locations should not overlap.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 */
static inline void
rte_mov128(uint8_t *dst, const uint8_t *src);

/**
 * Copy 256 bytes from one location to another using optimised
 * instructions. The locations should not overlap.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 */
static inline void
rte_mov256(uint8_t *dst, const uint8_t *src);

#ifdef __DOXYGEN__

/**
 * Copy bytes from one location to another. The locations must not overlap.
 *
 * @note This is implemented as a macro, so it's address should not be taken
 * and care is needed as parameter expressions may be evaluated multiple times.
 *
 * @param dst
 *   Pointer to the destination of the data.
 * @param src
 *   Pointer to the source data.
 * @param n
 *   Number of bytes to copy.
 * @return
 *   Pointer to the destination data.
 */
static void *
rte_memcpy(void *dst, const void *src, size_t n);

#endif /* __DOXYGEN__ */

#endif /* _RTE_MEMCPY_H_ */