LMSW
MEM0:r:w REG0=XED_REG_CR0:w:SUPP REG0=GPR16_B():r REG1=XED_REG_CR0:w:SUPP
x86_64 X86_LEGACY SYSTEM I286REAL source: xed
XED_LMSW_X86_LEGACY_0F_01_295729
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 01 0F 01 |
| opcode_map | 0F |
| mandatory_prefix | - |
| has_modrm | True |
| modrm.reg = /6 | /6 |
| attributes | RING0 NOTSX |
| cpl | 0 |
| raw_encoding | 0x0F 0x01 MOD[mm] MOD!=3 REG[0b110] RM[nnn] MODRM() 0x0F 0x01 MOD[0b11] MOD=3 REG[0b110] RM[nnn] |
Operands (4)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | MEM0 | MEM | w | R | EXPLICIT | MODRM_RM | |
| 1 | REG0 | REG | w | W | SUPPRESSED | MODRM_REG | |
| 2 | REG1 | REG | R | EXPLICIT | MODRM_REG | ||
| 3 | REG2 | REG | w | W | SUPPRESSED | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.