MOVSX

REG0=GPRv_R():w MEM0:r:w REG0=GPR64_R():w MEM0:r:w REG0=GPR16_R():w MEM0:r:w REG0=GPR32_R():w MEM0:r:w

x86_64 X86_LEGACY DATAXFER I386 source: xed

XED_MOVSX_GPRv_MEMw MOVSX_GPR64_MEMw MOVSX_GPR16_MEMw MOVSX_GPR32_MEMw

Encoding

encoding_kindX86_LEGACY
opcode_bytesBF 0F BF 0F BF 0F BF
opcode_map0F
mandatory_prefix-
has_modrmTrue
rex_w1
requires_modelong
cpl3
raw_encoding0x0F 0xBF MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() not64 0x0F 0xBF MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() mode64 rexw_prefix 0x0F 0xBF MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() mode64 norexw_prefix 66_prefix 0x0F 0xBF MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() mode64 norexw_prefix no66_prefix

Operands (8)

# Role Kind Class / Reg Width Access Visibility Encoded in
0 REG0 REG w W EXPLICIT MODRM_REG
1 MEM0 MEM w R EXPLICIT MODRM_RM
2 REG1 REG w W EXPLICIT MODRM_REG
3 MEM1 MEM w R EXPLICIT MODRM_RM
4 REG2 REG w W EXPLICIT MODRM_REG
5 MEM2 MEM w R EXPLICIT MODRM_RM
6 REG3 REG w W EXPLICIT MODRM_REG
7 MEM3 MEM w R EXPLICIT MODRM_RM

Micro-ops sequence (0)

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