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 unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\ 48 const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\ 49 return *mem;\ 50 } 51 52 #define mem_get_sne_aligned_generic(end,sz) \ 53 static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\ 54 const int##sz##_t *mem = (const int##sz##_t *)vmem;\ 55 return *mem;\ 56 } 57 58 #define mem_get_se_aligned_generic(end,sz) \ 59 static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\ 60 const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\ 61 unsigned MEM_VALUE_T val, raw = *mem;\ 62 swap_endian_##sz(val,raw);\ 63 return val;\ 64 } 65 66 #define mem_get_sse_aligned_generic(end,sz) \ 67 static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\ 68 const int##sz##_t *mem = (const int##sz##_t *)vmem;\ 69 unsigned MEM_VALUE_T val, raw = *mem;\ 70 swap_endian_##sz##_se(val,raw);\ 71 return val;\ 72 } 73 74 #define mem_put_ne_aligned_generic(end,sz) \ 75 static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\ 76 uint##sz##_t *mem = (uint##sz##_t *)vmem;\ 77 *mem = (uint##sz##_t)val;\ 78 } 79 80 #define mem_put_se_aligned_generic(end,sz) \ 81 static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\ 82 uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;\ 83 swap_endian_##sz(raw,val);\ 84 *mem = (uint##sz##_t)raw;\ 85 } 86 87 #include "vpx_config.h" 88 #if CONFIG_BIG_ENDIAN 89 #define mem_get_be_aligned_generic(sz) mem_get_ne_aligned_generic(be,sz) 90 #define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be,sz) 91 #define mem_get_le_aligned_generic(sz) mem_get_se_aligned_generic(le,sz) 92 #define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le,sz) 93 #define mem_put_be_aligned_generic(sz) mem_put_ne_aligned_generic(be,sz) 94 #define mem_put_le_aligned_generic(sz) mem_put_se_aligned_generic(le,sz) 95 #else 96 #define mem_get_be_aligned_generic(sz) mem_get_se_aligned_generic(be,sz) 97 #define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be,sz) 98 #define mem_get_le_aligned_generic(sz) mem_get_ne_aligned_generic(le,sz) 99 #define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le,sz) 100 #define mem_put_be_aligned_generic(sz) mem_put_se_aligned_generic(be,sz) 101 #define mem_put_le_aligned_generic(sz) mem_put_ne_aligned_generic(le,sz) 102 #endif 103 104 #undef mem_get_be16_aligned 105 #define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned) 106 mem_get_be_aligned_generic(16) 107 108 #undef mem_get_be32_aligned 109 #define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned) 110 mem_get_be_aligned_generic(32) 111 112 #undef mem_get_le16_aligned 113 #define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned) 114 mem_get_le_aligned_generic(16) 115 116 #undef mem_get_le32_aligned 117 #define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned) 118 mem_get_le_aligned_generic(32) 119 120 #undef mem_get_sbe16_aligned 121 #define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned) 122 mem_get_sbe_aligned_generic(16) 123 124 #undef mem_get_sbe32_aligned 125 #define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned) 126 mem_get_sbe_aligned_generic(32) 127 128 #undef mem_get_sle16_aligned 129 #define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned) 130 mem_get_sle_aligned_generic(16) 131 132 #undef mem_get_sle32_aligned 133 #define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned) 134 mem_get_sle_aligned_generic(32) 135 136 #undef mem_put_be16_aligned 137 #define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned) 138 mem_put_be_aligned_generic(16) 139 140 #undef mem_put_be32_aligned 141 #define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned) 142 mem_put_be_aligned_generic(32) 143 144 #undef mem_put_le16_aligned 145 #define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned) 146 mem_put_le_aligned_generic(16) 147 148 #undef mem_put_le32_aligned 149 #define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned) 150 mem_put_le_aligned_generic(32) 151 152 #undef mem_get_ne_aligned_generic 153 #undef mem_get_se_aligned_generic 154 #undef mem_get_sne_aligned_generic 155 #undef mem_get_sse_aligned_generic 156 #undef mem_put_ne_aligned_generic 157 #undef mem_put_se_aligned_generic 158 #undef swap_endian_16 159 #undef swap_endian_32 160 #undef swap_endian_16_se 161 #undef swap_endian_32_se 162 163 #endif // VPX_PORTS_MEM_OPS_ALIGNED_H_ 164