CMPNPXADD
MEM0:rw:q:u64 REG0=GPR64_R():rw:q:u64 REG1=GPR64_N():r:q:u64
x86_64 X86_LEGACY APX APX_F_CMPCCXADD source: xed
XED_CMPNPXADD_MEMu64_GPR64u64_GPR64u64_APX
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | EB |
| opcode_map | ONEBYTE |
| mandatory_prefix | - |
| has_modrm | True |
| vex_l | 0 |
| requires_mode | long |
| attributes | ATOMIC DISP8_NO_SCALE REQUIRES_ALIGNMENT_8B |
| exception_class | APX-EVEX-CMPCCXADD |
| cpl | 3 |
| raw_encoding | EVV 0xEB V66 V0F38 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() ND=0 NF=0 W1 VL128 mode64 ZEROING=0 EVAPX() |
Operands (3)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | MEM0 | MEM | q | RW | EXPLICIT | MODRM_RM | |
| 1 | REG0 | REG | q | RW | EXPLICIT | MODRM_REG | |
| 2 | REG1 | REG | q | R | 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.