PACKSSDW
REG0=MMX_R():rw:q:i32 REG1=MMX_B():r:q:i32
x86_64 X86_LEGACY MMX PENTIUMMMX source: xed
XED_PACKSSDW_X86_LEGACY_0F_6B_539496
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 6B |
| opcode_map | 0F |
| mandatory_prefix | - |
| has_modrm | True |
| attributes | HALF_WIDE_OUTPUT NOTSX |
| cpl | 3 |
| raw_encoding | 0x0F 0x6B no_refining_prefix MOD[0b11] MOD=3 REG[rrr] RM[nnn] |
Operands (2)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | q | RW | EXPLICIT | MODRM_REG | |
| 1 | REG1 | REG | q | R | EXPLICIT | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.