PMOVSXBD
REG0=XMM_R():w:dq:i32 MEM0:r:d:i8 REG0=XMM_R():w:dq:i32 REG1=XMM_B():r:d:i8
x86_64 X86_LEGACY SSE SSE4 source: xed
XED_PMOVSXBD_X86_LEGACY_0F38_21_733470
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 21 0F 38 21 |
| opcode_map | 0F38 |
| mandatory_prefix | - |
| has_modrm | True |
| exception_class | SSE_TYPE_5 |
| cpl | 3 |
| raw_encoding | 0x0F 0x38 0x21 osz_refining_prefix REFINING66() MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() 0x0F 0x38 0x21 osz_refining_prefix REFINING66() MOD[0b11] MOD=3 REG[rrr] RM[nnn] |
Operands (4)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | w | W | EXPLICIT | MODRM_REG | |
| 1 | MEM0 | MEM | d | R | EXPLICIT | MODRM_RM | |
| 2 | REG1 | REG | w | W | EXPLICIT | MODRM_REG | |
| 3 | REG2 | 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.