ENCODEKEY256
REG0=GPR32_R():w:d:u8 REG1=GPR32_B():r:d:u8 REG2=XED_REG_XMM0:rw:SUPP:dq:u8 REG3=XED_REG_XMM1:rw:SUPP:dq:u8 REG4=XED_REG_XMM2:w:SUPP:dq:u8 REG5=XED_REG_XMM3:w:SUPP:dq:u8 REG6=XED_REG_XMM4:w:SUPP:dq:u8 REG7=XED_REG_XMM5:w:SUPP:dq:u8 REG8=XED_REG_XMM6:w:SUPP:dq:u8
x86_64 X86_LEGACY KEYLOCKER KEYLOCKER source: xed
XED_ENCODEKEY256_GPR32u8_GPR32u8
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | FB |
| opcode_map | 0F38 |
| mandatory_prefix | - |
| has_modrm | True |
| cpl | 3 |
| raw_encoding | 0x0F 0x38 0xFB MOD[0b11] MOD=3 REG[rrr] RM[nnn] f3_refining_prefix |
Operands (9)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | w | W | EXPLICIT | MODRM_REG | |
| 1 | REG1 | REG | d | R | EXPLICIT | MODRM_REG | |
| 2 | REG2 | REG | (=XMM0) | RW | SUPPRESSED | MODRM_REG | |
| 3 | REG3 | REG | (=XMM1) | RW | SUPPRESSED | MODRM_REG | |
| 4 | REG4 | REG | (=XMM2) | w | W | SUPPRESSED | MODRM_REG |
| 5 | REG5 | REG | (=XMM3) | w | W | SUPPRESSED | MODRM_REG |
| 6 | REG6 | REG | (=XMM4) | w | W | SUPPRESSED | MODRM_REG |
| 7 | REG7 | REG | (=XMM5) | w | W | SUPPRESSED | MODRM_REG |
| 8 | REG8 | REG | (=XMM6) | w | W | SUPPRESSED | MODRM_REG |
Flag effects (6)
CF = SET_0
PF = SET_0
AF = SET_0
ZF = SET_0
SF = SET_0
OF = SET_0
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.