Volume 3: General-Purpose and System Instructions - Stanford ...

More documents

Recommendations

Info

AMD64 Technology 24594 Rev. 3.10 February 2005Table A-15.ModRM Memory References, 32-Bit and 64-Bit Addressing (continued)ModRMEffective Address 1ModRM reg Field 3modField/0 /1 /2 /3 /4 /5 /6 /7REX.B = 0 REX.B = 1 (binary) Complete ModRM Byte (hex)AL/rAX/MMX0/XMM0r8/MMX0/XMM8ModRMr/mField(binary)C0 C8 D0 D8 E0 E8 F0 F8 000CL/rCX/MMX1/XMM1 r9/MMX1/XMM9 C1 C9 D1 D9 E1 E9 F1 F9 001DL/rDX/MMX2/XMM2 r10/MMX2/XMM10 C2 CA D2 DA E2 EA F2 FA 010BL/rBX/MMX3/XMM3 r11/MMX3/XMM11 C3 CB D3 DB E3 EB F3 FB 01111AH/SPL/rSP/MMX4/XMM4 r12/MMX4/XMM12 C4 CC D4 DC E4 EC F4 FC 100CH/BPL/rBP/MMX5/XMM5 r13/MMX5/XMM13 C5 CD D5 DD E5 ED F5 FD 101DH/SIL/rSI/MMX6/XMM6 r14/MMX6/XMM14 C6 CE D6 DE E6 EE F6 FE 110BH/DIL/rDI/MMX7/XMM7 r15/MMX7/XMM15 C7 CF D7 DF E7 EF F7 FF 111Note:1. In these combinations, “disp8” and “disp32” indicate an 8-bit or 32-bit signed displacement.2. In 64-bit mode, the effective address is [RIP+disp32]. In all other modes, the effective address is [disp32]. If the address-size prefixis used in 64-bit mode to override 64-bit addressing, the [RIP+disp32] effective address is truncated after computation to 64 bits.3. See Table A-14 for complete specification of ModRM “reg” field.4. An SIB byte follows the ModRM byte to identify the memory operand.A.3.2 SIB OperandReferencesFigure A-3 on page 409 shows the format of a scale-index-base(SIB) byte. Some instructions have an SIB byte following theirModRM byte to define memory addressing for the complexaddressingmodes described in “Effective Addresses” inVolume 1. The SIB byte has three fields—scale, index, andbase—that define the scale factor, index-register number, andbase-register number for 32-bit and 64-bit complex addressingmodes. In 64-bit mode, the REX.B and REX.X bits extend theencoding of the SIB byte’s base and index fields.408 Appendix A: Opcode and Operand Encodings
24594 Rev. 3.10 February 2005 AMD64 TechnologyBits:7 6 5 4 3 2 1 0scale index base SIBREX.X bit of REX prefix canextend this field to 4 bitsREX.B bit of REX prefix canextend this field to 4 bits513-306.epsFigure A-3.SIB Byte FormatTable A-16.REX.B Bit01Table A-16 shows the encodings for the SIB byte’s base field,which specifies the base register for addressing. Table A-17 onpage 410 shows the encodings for the effective addressreferenced by a complete SIB byte, including its scale and indexfields. The /0 through /7 notation for the SIB base field meansthat the three-bit field contains a value between zero (binary000) and 7 (binary 111).SIB base Field ReferencesModRM mod Field00SIB base Field/0 /1 /2 /3 /4 /5 /6 /7disp3201 rAX rCX rDX rBX rSP rBP+disp810 rBP+disp3200disp3201 r8 r9 r10 r11 r12 r13+disp810 r13+disp32rSIr14rDIr15Appendix A: Opcode and Operand Encodings 409
Page 2 and 3:
© 2002, 2003, 2004, 2005 Advanced
Page 4 and 5:
AMD64 Technology 24594 Rev. 3.10 Fe
Page 6 and 7:
Page 8:
Page 12 and 13:
Page 14 and 15:
AMD64 Technology 24594—Rev. 3.10
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 294 and 295:
Page 296 and 297:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
Page 304 and 305:
Page 306 and 307:
Page 308 and 309:
Page 310 and 311:
Page 312 and 313:
Page 314 and 315:
Page 316 and 317:
Page 318 and 319:
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
Page 356 and 357:
Page 358 and 359:
Page 360 and 361:
Page 362 and 363:
Page 364 and 365:
Page 366 and 367:
Page 368 and 369:
Page 370 and 371:
Page 372 and 373:
Page 374 and 375:
Page 376 and 377:
Page 378 and 379:
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
Page 386 and 387:
Page 388 and 389: AMD64 Technology 24594 Rev. 3.10 Fe
Page 488 and 489:
Page 490 and 491:
Page 492 and 493:
Page 494 and 495:
Page 496 and 497:
Page 498 and 499:
Page 500 and 501:
Page 502 and 503:
Page 504 and 505:
Page 506 and 507:
Page 508 and 509:
Page 510 and 511:
Page 512 and 513:
Page 514 and 515:
Page 516 and 517:
Page 518 and 519:
Page 520 and 521:
Page 522 and 523:
Page 524 and 525:
Page 526 and 527:
Page 528 and 529:
Page 530 and 531:
Page 532 and 533:
Page 534:
show all

Volume 3: General-Purpose and System Instructions - Stanford ...

Create successful ePaper yourself

Delete template?

Save as template?