WRUSSD
MEM0:w:d:u32 REG0=GPR32_R():r:d:u32
x86_64 X86_LEGACY CET CET source: xed
XED_WRUSSD_MEMu32_GPR32u32
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | F5 |
| opcode_map | 0F38 |
| mandatory_prefix | - |
| has_modrm | True |
| attributes | PROTECTED_MODE RING0 |
| cpl | 0 |
| raw_encoding | 0x0F 0x38 0xF5 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() norexw_prefix osz_refining_prefix |
Operands (2)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | MEM0 | MEM | w | W | EXPLICIT | MODRM_RM | |
| 1 | REG0 | REG | d | R | EXPLICIT | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.