XADD_LOCK
MEM0:rw:b REG0=GPR8_R():rw
x86_64 X86_LEGACY SEMAPHORE I486REAL source: xed
XED_XADD_LOCK_X86_LEGACY_0F_C0_257934
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | C0 |
| opcode_map | 0F |
| mandatory_prefix | - |
| has_modrm | True |
| attributes | BYTEOP LOCKED HLE_ACQ_ABLE HLE_REL_ABLE |
| cpl | 3 |
| raw_encoding | 0x0F 0xC0 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() lock_prefix |
Operands (2)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | MEM0 | MEM | b | RW | EXPLICIT | MODRM_RM | |
| 1 | REG0 | REG | RW | EXPLICIT | MODRM_REG |
Flag effects (6)
CF = WRITE
PF = WRITE
AF = WRITE
ZF = WRITE
SF = WRITE
OF = WRITE
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.