OR_LOCK
MEM0:rw:v IMM0:r:b:i8
x86_64 X86_LEGACY LOGICAL I86 source: xed
XED_OR_LOCK_X86_LEGACY_ONEBYTE_83_64884
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 83 |
| opcode_map | ONEBYTE |
| mandatory_prefix | - |
| has_modrm | True |
| modrm.reg = /1 | /1 |
| imm_size_bytes | 1 signed |
| attributes | LOCKED HLE_ACQ_ABLE HLE_REL_ABLE |
| cpl | 3 |
| raw_encoding | 0x83 MOD[mm] MOD!=3 REG[0b001] RM[nnn] MODRM() SIMM8() lock_prefix |
Operands (2)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | MEM0 | MEM | v | RW | EXPLICIT | MODRM_RM | |
| 1 | IMM0 | IMM | b | R | EXPLICIT | IMM |
Flag effects (6)
CF = SET_0
PF = WRITE
AF = UNDEFINED
ZF = WRITE
SF = WRITE
OF = SET_0
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.