NOP
REG0=GPRv_B():r REG1=GPRv_R():r REG0=GPRv_B():r REG1=GPRv_R():r REG0=GPRv_B():r REG1=GPRv_R():r
x86_64 X86_LEGACY WIDENOP PPRO source: xed
XED_NOP_GPRv_GPRv_0F1A NOP_GPRv_GPRv_0F1B NOP_GPRv_GPRv_0F1B
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 1A 0F 1B 0F 1B |
| opcode_map | 0F |
| mandatory_prefix | - |
| has_modrm | True |
| attributes | NOP |
| cpl | 3 |
| raw_encoding | 0x0F 0x1A MPXMODE=1 MOD[0b11] MOD=3 REG[rrr] RM[nnn] no_refining_prefix 0x0F 0x1B MPXMODE=1 MOD[0b11] MOD=3 REG[rrr] RM[nnn] no_refining_prefix 0x0F 0x1B MPXMODE=1 MOD[0b11] MOD=3 REG[rrr] RM[nnn] f3_refining_prefix |
Operands (6)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | R | EXPLICIT | MODRM_REG | ||
| 1 | REG1 | REG | R | EXPLICIT | MODRM_REG | ||
| 2 | REG2 | REG | R | EXPLICIT | MODRM_REG | ||
| 3 | REG3 | REG | R | EXPLICIT | MODRM_REG | ||
| 4 | REG4 | REG | R | EXPLICIT | MODRM_REG | ||
| 5 | REG5 | REG | R | EXPLICIT | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.