MOVSX

REG0=GPRv_R():w MEM0:r:b

x86_64 X86_LEGACY DATAXFER I386 source: xed

XED_MOVSX_X86_LEGACY_0F_BE_961000

Encoding

encoding_kindX86_LEGACY
opcode_bytesBE
opcode_map0F
mandatory_prefix-
has_modrmTrue
cpl3
raw_encoding0x0F 0xBE MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM()

Operands (2)

# Role Kind Class / Reg Width Access Visibility Encoded in
0 REG0 REG w W EXPLICIT MODRM_REG
1 MEM0 MEM b R EXPLICIT MODRM_RM

Micro-ops sequence (0)

No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.