21 #ifndef AVCODEC_X86_CABAC_H 22 #define AVCODEC_X86_CABAC_H 32 #ifdef BROKEN_RELOCATIONS 33 #define TABLES_ARG , "r"(tables) 36 #define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \ 37 "cmp "low" , "tmp" \n\t"\ 38 "cmova %%ecx , "range" \n\t"\ 39 "sbb %%rcx , %%rcx \n\t"\ 40 "and %%ecx , "tmp" \n\t"\ 41 "xor %%rcx , "retq" \n\t"\ 42 "sub "tmp" , "low" \n\t" 44 #define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \ 46 "sub "low" , "tmp" \n\t"\ 47 "sar $31 , "tmp" \n\t"\ 48 "sub %%ecx , "range" \n\t"\ 49 "and "tmp" , "range" \n\t"\ 50 "add %%ecx , "range" \n\t"\ 51 "shl $17 , %%ecx \n\t"\ 52 "and "tmp" , %%ecx \n\t"\ 53 "sub %%ecx , "low" \n\t"\ 54 "xor "tmp" , "ret" \n\t"\ 55 "movslq "ret" , "retq" \n\t" 58 #define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \ 59 "movzbl "statep" , "ret" \n\t"\ 60 "mov "range" , "tmp" \n\t"\ 61 "and $0xC0 , "range" \n\t"\ 62 "lea ("ret", "range", 2), %%ecx \n\t"\ 63 "movzbl "lps_off"("tables", %%rcx), "range" \n\t"\ 64 "sub "range" , "tmp" \n\t"\ 65 "mov "tmp" , %%ecx \n\t"\ 66 "shl $17 , "tmp" \n\t"\ 67 BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \ 68 "movzbl "norm_off"("tables", "rangeq"), %%ecx \n\t"\ 69 "shl %%cl , "range" \n\t"\ 70 "movzbl "mlps_off"+128("tables", "retq"), "tmp" \n\t"\ 71 "shl %%cl , "low" \n\t"\ 72 "mov "tmpbyte" , "statep" \n\t"\ 73 "test "lowword" , "lowword" \n\t"\ 75 "mov "byte" , %%"REG_c" \n\t"\ 76 "cmp "end" , %%"REG_c" \n\t"\ 78 "add"OPSIZE" $2 , "byte" \n\t"\ 80 "movzwl (%%"REG_c") , "tmp" \n\t"\ 81 "lea -1("low") , %%ecx \n\t"\ 82 "xor "low" , %%ecx \n\t"\ 83 "shr $15 , %%ecx \n\t"\ 85 "shr $15 , "tmp" \n\t"\ 86 "movzbl "norm_off"("tables", %%rcx), %%ecx \n\t"\ 87 "sub $0xFFFF , "tmp" \n\t"\ 89 "add $7 , %%ecx \n\t"\ 90 "shl %%cl , "tmp" \n\t"\ 91 "add "tmp" , "low" \n\t"\ 98 #define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\ 99 "mov "tmp" , %%ecx \n\t"\ 100 "shl $17 , "tmp" \n\t"\ 101 "cmp "low" , "tmp" \n\t"\ 102 "cmova %%ecx , "range" \n\t"\ 103 "sbb %%ecx , %%ecx \n\t"\ 104 "and %%ecx , "tmp" \n\t"\ 105 "xor %%ecx , "ret" \n\t"\ 106 "sub "tmp" , "low" \n\t" 108 #define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\ 109 "mov "tmp" , %%ecx \n\t"\ 110 "shl $17 , "tmp" \n\t"\ 111 "sub "low" , "tmp" \n\t"\ 112 "sar $31 , "tmp" \n\t" \ 113 "sub %%ecx , "range" \n\t" \ 114 "and "tmp" , "range" \n\t" \ 115 "add %%ecx , "range" \n\t" \ 116 "shl $17 , %%ecx \n\t"\ 117 "and "tmp" , %%ecx \n\t"\ 118 "sub %%ecx , "low" \n\t"\ 119 "xor "tmp" , "ret" \n\t" 122 #define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \ 123 "movzbl "statep" , "ret" \n\t"\ 124 "mov "range" , "tmp" \n\t"\ 125 "and $0xC0 , "range" \n\t"\ 126 "movzbl "MANGLE(ff_h264_cabac_tables)"+"lps_off"("ret", "range", 2), "range" \n\t"\ 127 "sub "range" , "tmp" \n\t"\ 128 BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp) \ 129 "movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"("range"), %%ecx \n\t"\ 130 "shl %%cl , "range" \n\t"\ 131 "movzbl "MANGLE(ff_h264_cabac_tables)"+"mlps_off"+128("ret"), "tmp" \n\t"\ 132 "shl %%cl , "low" \n\t"\ 133 "mov "tmpbyte" , "statep" \n\t"\ 134 "test "lowword" , "lowword" \n\t"\ 136 "mov "byte" , %%"REG_c" \n\t"\ 137 "cmp "end" , %%"REG_c" \n\t"\ 139 "add"OPSIZE" $2 , "byte" \n\t"\ 141 "movzwl (%%"REG_c") , "tmp" \n\t"\ 142 "lea -1("low") , %%ecx \n\t"\ 143 "xor "low" , %%ecx \n\t"\ 144 "shr $15 , %%ecx \n\t"\ 146 "shr $15 , "tmp" \n\t"\ 147 "movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"(%%ecx), %%ecx \n\t"\ 148 "sub $0xFFFF , "tmp" \n\t"\ 150 "add $7 , %%ecx \n\t"\ 151 "shl %%cl , "tmp" \n\t"\ 152 "add "tmp" , "low" \n\t"\ 159 #define get_cabac_inline get_cabac_inline_x86 164 #ifdef BROKEN_RELOCATIONS 174 BRANCHLESS_GET_CABAC(
"%0",
"%q0",
"(%4)",
"%1",
"%w1",
175 "%2",
"%q2",
"%3",
"%b3",
176 "%c6(%5)",
"%c7(%5)",
181 :
"=&r"(bit),
"+&r"(c->low),
"+&r"(c->range),
"=&q"(tmp)
182 :
"r"(
state),
"r"(c),
192 #define get_cabac_bypass_sign get_cabac_bypass_sign_x86 197 "movl %c6(%2), %k1 \n\t" 198 "movl %c3(%2), %%eax \n\t" 200 "add %%eax, %%eax \n\t" 201 "sub %k1, %%eax \n\t" 203 "and %%edx, %k1 \n\t" 204 "add %k1, %%eax \n\t" 205 "xor %%edx, %%ecx \n\t" 206 "sub %%edx, %%ecx \n\t" 207 "test %%ax, %%ax \n\t" 209 "mov %c4(%2), %1 \n\t" 210 "subl $0xFFFF, %%eax \n\t" 211 "movzwl (%1), %%edx \n\t" 213 "shrl $15, %%edx \n\t" 214 "addl %%edx, %%eax \n\t" 215 "cmp %c5(%2), %1 \n\t" 217 "add"OPSIZE
" $2, %c4(%2) \n\t" 219 "movl %%eax, %c3(%2) \n\t" 221 :
"+c"(val),
"=&r"(tmp)
227 :
"%eax",
"%edx",
"memory" 232 #define get_cabac_bypass get_cabac_bypass_x86 238 "movl %c6(%2), %k1 \n\t" 239 "movl %c3(%2), %%eax \n\t" 241 "add %%eax, %%eax \n\t" 242 "sub %k1, %%eax \n\t" 244 "and %%edx, %k1 \n\t" 245 "add %k1, %%eax \n\t" 247 "test %%ax, %%ax \n\t" 249 "mov %c4(%2), %1 \n\t" 250 "subl $0xFFFF, %%eax \n\t" 251 "movzwl (%1), %%ecx \n\t" 253 "shrl $15, %%ecx \n\t" 254 "addl %%ecx, %%eax \n\t" 255 "cmp %c5(%2), %1 \n\t" 257 "add"OPSIZE
" $2, %c4(%2) \n\t" 259 "movl %%eax, %c3(%2) \n\t" 261 :
"=&d"(res),
"=&r"(tmp)
267 :
"%eax",
"%ecx",
"memory" uint8_t ff_h264_cabac_tables[512+4 *2 *64+4 *64+63]
Macro definitions for various function/variable attributes.
Utility Preprocessor macros.
static const uint8_t *const tables[]
#define H264_MLPS_STATE_OFFSET
#define H264_NORM_SHIFT_OFFSET
Context Adaptive Binary Arithmetic Coder.
#define H264_LPS_RANGE_OFFSET