MOV_DR
REG0=GPR32_B():w REG1=DR_R():r REG0=GPR64_B():w REG1=DR_R():r
x86_64 X86_LEGACY DATAXFER I86 source: xed
XED_MOV_DR_X86_LEGACY_0F_21_511370
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 21 0F 21 |
| opcode_map | 0F |
| mandatory_prefix | - |
| has_modrm | True |
| requires_mode | long |
| attributes | RING0 |
| cpl | 0 |
| raw_encoding | 0x0F 0x21 MOD[mm] REG[rrr] RM[nnn] CR_WIDTH() not64 0x0F 0x21 MOD[mm] REG[rrr] RM[nnn] CR_WIDTH() mode64 |
Operands (4)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | w | W | EXPLICIT | MODRM_REG | |
| 1 | REG1 | REG | R | EXPLICIT | MODRM_REG | ||
| 2 | REG2 | REG | w | W | EXPLICIT | MODRM_REG | |
| 3 | REG3 | REG | R | EXPLICIT | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.