ceph/src/spdk/dpdk/lib/librte_eal/include/generic/rte_memcpy.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_MEMCPY_H_
   6 #define _RTE_MEMCPY_H_
   7
   8 /**
   9  * @file
  10  *
  11  * Functions for vectorised implementation of memcpy().
  12  */
  13
  14 /**
  15  * Copy 16 bytes from one location to another using optimised
  16  * instructions. The locations should not overlap.
  17  *
  18  * @param dst
  19  *   Pointer to the destination of the data.
  20  * @param src
  21  *   Pointer to the source data.
  22  */
  23 static inline void
  24 rte_mov16(uint8_t *dst, const uint8_t *src);
  25
  26 /**
  27  * Copy 32 bytes from one location to another using optimised
  28  * instructions. The locations should not overlap.
  29  *
  30  * @param dst
  31  *   Pointer to the destination of the data.
  32  * @param src
  33  *   Pointer to the source data.
  34  */
  35 static inline void
  36 rte_mov32(uint8_t *dst, const uint8_t *src);
  37
  38 #ifdef __DOXYGEN__
  39
  40 /**
  41  * Copy 48 bytes from one location to another using optimised
  42  * instructions. The locations should not overlap.
  43  *
  44  * @param dst
  45  *   Pointer to the destination of the data.
  46  * @param src
  47  *   Pointer to the source data.
  48  */
  49 static inline void
  50 rte_mov48(uint8_t *dst, const uint8_t *src);
  51
  52 #endif /* __DOXYGEN__ */
  53
  54 /**
  55  * Copy 64 bytes from one location to another using optimised
  56  * instructions. The locations should not overlap.
  57  *
  58  * @param dst
  59  *   Pointer to the destination of the data.
  60  * @param src
  61  *   Pointer to the source data.
  62  */
  63 static inline void
  64 rte_mov64(uint8_t *dst, const uint8_t *src);
  65
  66 /**
  67  * Copy 128 bytes from one location to another using optimised
  68  * instructions. The locations should not overlap.
  69  *
  70  * @param dst
  71  *   Pointer to the destination of the data.
  72  * @param src
  73  *   Pointer to the source data.
  74  */
  75 static inline void
  76 rte_mov128(uint8_t *dst, const uint8_t *src);
  77
  78 /**
  79  * Copy 256 bytes from one location to another using optimised
  80  * instructions. The locations should not overlap.
  81  *
  82  * @param dst
  83  *   Pointer to the destination of the data.
  84  * @param src
  85  *   Pointer to the source data.
  86  */
  87 static inline void
  88 rte_mov256(uint8_t *dst, const uint8_t *src);
  89
  90 #ifdef __DOXYGEN__
  91
  92 /**
  93  * Copy bytes from one location to another. The locations must not overlap.
  94  *
  95  * @note This is implemented as a macro, so it's address should not be taken
  96  * and care is needed as parameter expressions may be evaluated multiple times.
  97  *
  98  * @param dst
  99  *   Pointer to the destination of the data.
 100  * @param src
 101  *   Pointer to the source data.
 102  * @param n
 103  *   Number of bytes to copy.
 104  * @return
 105  *   Pointer to the destination data.
 106  */
 107 static void *
 108 rte_memcpy(void *dst, const void *src, size_t n);
 109
 110 #endif /* __DOXYGEN__ */
 111
 112 #endif /* _RTE_MEMCPY_H_ */