aom_ports/mem_ops_aligned.h

   1 /*
   2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11
  12 #ifndef AOM_PORTS_MEM_OPS_ALIGNED_H_
  13 #define AOM_PORTS_MEM_OPS_ALIGNED_H_
  14
  15 #include "aom/aom_integer.h"
  16
  17 /* \file
  18  * \brief Provides portable memory access primitives for operating on aligned
  19  *        data
  20  *
  21  * This file is split from mem_ops.h for easier maintenance. See mem_ops.h
  22  * for a more detailed description of these primitives.
  23  */
  24 #ifndef INCLUDED_BY_MEM_OPS_H
  25 #error Include mem_ops.h, not mem_ops_aligned.h directly.
  26 #endif
  27
  28 /* Architectures that provide instructions for doing this byte swapping
  29  * could redefine these macros.
  30  */
  31 #define swap_endian_16(val, raw)                                     \
  32   do {                                                               \
  33     val = (uint16_t)(((raw >> 8) & 0x00ff) | ((raw << 8) & 0xff00)); \
  34   } while (0)
  35 #define swap_endian_32(val, raw)                                   \
  36   do {                                                             \
  37     val = ((raw >> 24) & 0x000000ff) | ((raw >> 8) & 0x0000ff00) | \
  38           ((raw << 8) & 0x00ff0000) | ((raw << 24) & 0xff000000);  \
  39   } while (0)
  40 #define swap_endian_16_se(val, raw) \
  41   do {                              \
  42     swap_endian_16(val, raw);       \
  43     val = ((val << 16) >> 16);      \
  44   } while (0)
  45 #define swap_endian_32_se(val, raw) swap_endian_32(val, raw)
  46
  47 #define mem_get_ne_aligned_generic(end, sz)                           \
  48   static AOM_INLINE unsigned MEM_VALUE_T mem_get_##end##sz##_aligned( \
  49       const void *vmem) {                                             \
  50     const uint##sz##_t *mem = (const uint##sz##_t *)vmem;             \
  51     return *mem;                                                      \
  52   }
  53
  54 #define mem_get_sne_aligned_generic(end, sz)                         \
  55   static AOM_INLINE signed MEM_VALUE_T mem_get_s##end##sz##_aligned( \
  56       const void *vmem) {                                            \
  57     const int##sz##_t *mem = (const int##sz##_t *)vmem;              \
  58     return *mem;                                                     \
  59   }
  60
  61 #define mem_get_se_aligned_generic(end, sz)                           \
  62   static AOM_INLINE unsigned MEM_VALUE_T mem_get_##end##sz##_aligned( \
  63       const void *vmem) {                                             \
  64     const uint##sz##_t *mem = (const uint##sz##_t *)vmem;             \
  65     unsigned MEM_VALUE_T val, raw = *mem;                             \
  66     swap_endian_##sz(val, raw);                                       \
  67     return val;                                                       \
  68   }
  69
  70 #define mem_get_sse_aligned_generic(end, sz)                         \
  71   static AOM_INLINE signed MEM_VALUE_T mem_get_s##end##sz##_aligned( \
  72       const void *vmem) {                                            \
  73     const int##sz##_t *mem = (const int##sz##_t *)vmem;              \
  74     unsigned MEM_VALUE_T val, raw = *mem;                            \
  75     swap_endian_##sz##_se(val, raw);                                 \
  76     return val;                                                      \
  77   }
  78
  79 #define mem_put_ne_aligned_generic(end, sz)                             \
  80   static AOM_INLINE void mem_put_##end##sz##_aligned(void *vmem,        \
  81                                                      MEM_VALUE_T val) { \
  82     uint##sz##_t *mem = (uint##sz##_t *)vmem;                           \
  83     *mem = (uint##sz##_t)val;                                           \
  84   }
  85
  86 #define mem_put_se_aligned_generic(end, sz)                             \
  87   static AOM_INLINE void mem_put_##end##sz##_aligned(void *vmem,        \
  88                                                      MEM_VALUE_T val) { \
  89     uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;                      \
  90     swap_endian_##sz(raw, val);                                         \
  91     *mem = (uint##sz##_t)raw;                                           \
  92   }
  93
  94 #include "aom_config.h"
  95 #if CONFIG_BIG_ENDIAN
  96 #define mem_get_be_aligned_generic(sz) mem_get_ne_aligned_generic(be, sz)
  97 #define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be, sz)
  98 #define mem_get_le_aligned_generic(sz) mem_get_se_aligned_generic(le, sz)
  99 #define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le, sz)
 100 #define mem_put_be_aligned_generic(sz) mem_put_ne_aligned_generic(be, sz)
 101 #define mem_put_le_aligned_generic(sz) mem_put_se_aligned_generic(le, sz)
 102 #else
 103 #define mem_get_be_aligned_generic(sz) mem_get_se_aligned_generic(be, sz)
 104 #define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be, sz)
 105 #define mem_get_le_aligned_generic(sz) mem_get_ne_aligned_generic(le, sz)
 106 #define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le, sz)
 107 #define mem_put_be_aligned_generic(sz) mem_put_se_aligned_generic(be, sz)
 108 #define mem_put_le_aligned_generic(sz) mem_put_ne_aligned_generic(le, sz)
 109 #endif
 110
 111 /* clang-format off */
 112 #undef  mem_get_be16_aligned
 113 #define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned)
 114 mem_get_be_aligned_generic(16)
 115
 116 #undef  mem_get_be32_aligned
 117 #define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned)
 118 mem_get_be_aligned_generic(32)
 119
 120 #undef  mem_get_le16_aligned
 121 #define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned)
 122 mem_get_le_aligned_generic(16)
 123
 124 #undef  mem_get_le32_aligned
 125 #define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned)
 126 mem_get_le_aligned_generic(32)
 127
 128 #undef  mem_get_sbe16_aligned
 129 #define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned)
 130 mem_get_sbe_aligned_generic(16)
 131
 132 #undef  mem_get_sbe32_aligned
 133 #define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned)
 134 mem_get_sbe_aligned_generic(32)
 135
 136 #undef  mem_get_sle16_aligned
 137 #define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned)
 138 mem_get_sle_aligned_generic(16)
 139
 140 #undef  mem_get_sle32_aligned
 141 #define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned)
 142 mem_get_sle_aligned_generic(32)
 143
 144 #undef  mem_put_be16_aligned
 145 #define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned)
 146 mem_put_be_aligned_generic(16)
 147
 148 #undef  mem_put_be32_aligned
 149 #define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned)
 150 mem_put_be_aligned_generic(32)
 151
 152 #undef  mem_put_le16_aligned
 153 #define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned)
 154 mem_put_le_aligned_generic(16)
 155
 156 #undef  mem_put_le32_aligned
 157 #define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned)
 158 mem_put_le_aligned_generic(32)
 159
 160 #undef mem_get_ne_aligned_generic
 161 #undef mem_get_se_aligned_generic
 162 #undef mem_get_sne_aligned_generic
 163 #undef mem_get_sse_aligned_generic
 164 #undef mem_put_ne_aligned_generic
 165 #undef mem_put_se_aligned_generic
 166 #undef swap_endian_16
 167 #undef swap_endian_32
 168 #undef swap_endian_16_se
 169 #undef swap_endian_32_se
 170 /* clang-format on */
 171
 172 #endif  // AOM_PORTS_MEM_OPS_ALIGNED_H_