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) \ 31 do { \ 32 val = (uint16_t)(((raw >> 8) & 0x00ff) | ((raw << 8) & 0xff00)); \ 33 } while (0) 34 #define swap_endian_32(val, raw) \ 35 do { \ 36 val = ((raw >> 24) & 0x000000ff) | ((raw >> 8) & 0x0000ff00) | \ 37 ((raw << 8) & 0x00ff0000) | ((raw << 24) & 0xff000000); \ 38 } while (0) 39 #define swap_endian_16_se(val, raw) \ 40 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 mem_get_##end##sz##_aligned( \ 48 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 mem_get_s##end##sz##_aligned( \ 55 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 mem_get_##end##sz##_aligned( \ 62 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 mem_get_s##end##sz##_aligned( \ 71 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 mem_put_##end##sz##_aligned(void *vmem, \ 80 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 mem_put_##end##sz##_aligned(void *vmem, \ 87 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 /* clang-format off */ 111 #undef mem_get_be16_aligned 112 #define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned) 113 mem_get_be_aligned_generic(16) 114 115 #undef mem_get_be32_aligned 116 #define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned) 117 mem_get_be_aligned_generic(32) 118 119 #undef mem_get_le16_aligned 120 #define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned) 121 mem_get_le_aligned_generic(16) 122 123 #undef mem_get_le32_aligned 124 #define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned) 125 mem_get_le_aligned_generic(32) 126 127 #undef mem_get_sbe16_aligned 128 #define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned) 129 mem_get_sbe_aligned_generic(16) 130 131 #undef mem_get_sbe32_aligned 132 #define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned) 133 mem_get_sbe_aligned_generic(32) 134 135 #undef mem_get_sle16_aligned 136 #define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned) 137 mem_get_sle_aligned_generic(16) 138 139 #undef mem_get_sle32_aligned 140 #define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned) 141 mem_get_sle_aligned_generic(32) 142 143 #undef mem_put_be16_aligned 144 #define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned) 145 mem_put_be_aligned_generic(16) 146 147 #undef mem_put_be32_aligned 148 #define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned) 149 mem_put_be_aligned_generic(32) 150 151 #undef mem_put_le16_aligned 152 #define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned) 153 mem_put_le_aligned_generic(16) 154 155 #undef mem_put_le32_aligned 156 #define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned) 157 mem_put_le_aligned_generic(32) 158 159 #undef mem_get_ne_aligned_generic 160 #undef mem_get_se_aligned_generic 161 #undef mem_get_sne_aligned_generic 162 #undef mem_get_sse_aligned_generic 163 #undef mem_put_ne_aligned_generic 164 #undef mem_put_se_aligned_generic 165 #undef swap_endian_16 166 #undef swap_endian_32 167 #undef swap_endian_16_se 168 #undef swap_endian_32_se 169 /* clang-format on */ 170 171 #endif // VPX_PORTS_MEM_OPS_ALIGNED_H_ 172