media/libvpx/vpx_ports/mem_ops_aligned.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #ifndef VPX_PORTS_MEM_OPS_ALIGNED_H_
  12 #define VPX_PORTS_MEM_OPS_ALIGNED_H_
  13
  14 #include "vpx/vpx_integer.h"
  15
  16 /* \file
  17  * \brief Provides portable memory access primitives for operating on aligned
  18  *        data
  19  *
  20  * This file is split from mem_ops.h for easier maintenance. See mem_ops.h
  21  * for a more detailed description of these primitives.
  22  */
  23 #ifndef INCLUDED_BY_MEM_OPS_H
  24 #error Include mem_ops.h, not mem_ops_aligned.h directly.
  25 #endif
  26
  27 /* Architectures that provide instructions for doing this byte swapping
  28  * could redefine these macros.
  29  */
  30 #define swap_endian_16(val,raw) do {\
  31     val = ((raw>>8) & 0x00ff) \
  32           | ((raw<<8) & 0xff00);\
  33   } while(0)
  34 #define swap_endian_32(val,raw) do {\
  35     val = ((raw>>24) & 0x000000ff) \
  36           | ((raw>>8)  & 0x0000ff00) \
  37           | ((raw<<8)  & 0x00ff0000) \
  38           | ((raw<<24) & 0xff000000); \
  39   } while(0)
  40 #define swap_endian_16_se(val,raw) do {\
  41     swap_endian_16(val,raw);\
  42     val = ((val << 16) >> 16);\
  43   } while(0)
  44 #define swap_endian_32_se(val,raw) swap_endian_32(val,raw)
  45
  46 #define mem_get_ne_aligned_generic(end,sz) \
  47   static VPX_INLINE unsigned MEM_VALUE_T \
  48     mem_get_##end##sz##_aligned(const void *vmem) {\
  49     const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
  50     return *mem;\
  51   }
  52
  53 #define mem_get_sne_aligned_generic(end,sz) \
  54   static VPX_INLINE signed MEM_VALUE_T \
  55     mem_get_s##end##sz##_aligned(const void *vmem) {\
  56     const int##sz##_t *mem = (const int##sz##_t *)vmem;\
  57     return *mem;\
  58   }
  59
  60 #define mem_get_se_aligned_generic(end,sz) \
  61   static VPX_INLINE unsigned MEM_VALUE_T \
  62     mem_get_##end##sz##_aligned(const void *vmem) {\
  63     const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
  64     unsigned MEM_VALUE_T val, raw = *mem;\
  65     swap_endian_##sz(val,raw);\
  66     return val;\
  67   }
  68
  69 #define mem_get_sse_aligned_generic(end,sz) \
  70   static VPX_INLINE signed MEM_VALUE_T \
  71     mem_get_s##end##sz##_aligned(const void *vmem) {\
  72     const int##sz##_t *mem = (const int##sz##_t *)vmem;\
  73     unsigned MEM_VALUE_T val, raw = *mem;\
  74     swap_endian_##sz##_se(val,raw);\
  75     return val;\
  76   }
  77
  78 #define mem_put_ne_aligned_generic(end,sz) \
  79   static VPX_INLINE void \
  80     mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
  81     uint##sz##_t *mem = (uint##sz##_t *)vmem;\
  82     *mem = (uint##sz##_t)val;\
  83   }
  84
  85 #define mem_put_se_aligned_generic(end,sz) \
  86   static VPX_INLINE void \
  87     mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
  88     uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;\
  89     swap_endian_##sz(raw,val);\
  90     *mem = (uint##sz##_t)raw;\
  91   }
  92
  93 #include "vpx_config.h"
  94 #if CONFIG_BIG_ENDIAN
  95 #define mem_get_be_aligned_generic(sz)  mem_get_ne_aligned_generic(be,sz)
  96 #define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be,sz)
  97 #define mem_get_le_aligned_generic(sz)  mem_get_se_aligned_generic(le,sz)
  98 #define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le,sz)
  99 #define mem_put_be_aligned_generic(sz)  mem_put_ne_aligned_generic(be,sz)
 100 #define mem_put_le_aligned_generic(sz)  mem_put_se_aligned_generic(le,sz)
 101 #else
 102 #define mem_get_be_aligned_generic(sz)  mem_get_se_aligned_generic(be,sz)
 103 #define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be,sz)
 104 #define mem_get_le_aligned_generic(sz)  mem_get_ne_aligned_generic(le,sz)
 105 #define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le,sz)
 106 #define mem_put_be_aligned_generic(sz)  mem_put_se_aligned_generic(be,sz)
 107 #define mem_put_le_aligned_generic(sz)  mem_put_ne_aligned_generic(le,sz)
 108 #endif
 109
 110 #undef  mem_get_be16_aligned
 111 #define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned)
 112 mem_get_be_aligned_generic(16)
 113
 114 #undef  mem_get_be32_aligned
 115 #define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned)
 116 mem_get_be_aligned_generic(32)
 117
 118 #undef  mem_get_le16_aligned
 119 #define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned)
 120 mem_get_le_aligned_generic(16)
 121
 122 #undef  mem_get_le32_aligned
 123 #define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned)
 124 mem_get_le_aligned_generic(32)
 125
 126 #undef  mem_get_sbe16_aligned
 127 #define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned)
 128 mem_get_sbe_aligned_generic(16)
 129
 130 #undef  mem_get_sbe32_aligned
 131 #define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned)
 132 mem_get_sbe_aligned_generic(32)
 133
 134 #undef  mem_get_sle16_aligned
 135 #define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned)
 136 mem_get_sle_aligned_generic(16)
 137
 138 #undef  mem_get_sle32_aligned
 139 #define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned)
 140 mem_get_sle_aligned_generic(32)
 141
 142 #undef  mem_put_be16_aligned
 143 #define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned)
 144 mem_put_be_aligned_generic(16)
 145
 146 #undef  mem_put_be32_aligned
 147 #define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned)
 148 mem_put_be_aligned_generic(32)
 149
 150 #undef  mem_put_le16_aligned
 151 #define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned)
 152 mem_put_le_aligned_generic(16)
 153
 154 #undef  mem_put_le32_aligned
 155 #define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned)
 156 mem_put_le_aligned_generic(32)
 157
 158 #undef mem_get_ne_aligned_generic
 159 #undef mem_get_se_aligned_generic
 160 #undef mem_get_sne_aligned_generic
 161 #undef mem_get_sse_aligned_generic
 162 #undef mem_put_ne_aligned_generic
 163 #undef mem_put_se_aligned_generic
 164 #undef swap_endian_16
 165 #undef swap_endian_32
 166 #undef swap_endian_16_se
 167 #undef swap_endian_32_se
 168
 169 #endif  // VPX_PORTS_MEM_OPS_ALIGNED_H_