MOVDIR64B

REG0=A_GPR_R():r MEM0:r:zd:u32 MEM1:w:zd:SUPP BASE1=A_GPR_R():r:SUPP SEG1=XED_REG_ES:r:SUPP REG0=A_GPR_R():r MEM0:r:zd:u32 MEM1:w:zd:SUPP BASE1=A_GPR_R():r:SUPP

x86_64 X86_LEGACY MOVDIR MOVDIR64B source: xed

XED_MOVDIR64B_GPRa_MEM MOVDIR64B_GPRa_MEM

Encoding

encoding_kindX86_LEGACY
opcode_bytesF8 0F 38 F8
opcode_map0F38
mandatory_prefix-
has_modrmTrue
requires_modelong
attributesREQUIRES_ALIGNMENT
cpl3
raw_encoding0x0F 0x38 0xF8 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() osz_refining_prefix not64 0x0F 0x38 0xF8 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() osz_refining_prefix mode64

Operands (9)

# Role Kind Class / Reg Width Access Visibility Encoded in
0 REG0 REG R EXPLICIT MODRM_REG
1 MEM0 MEM R EXPLICIT MODRM_RM
2 MEM1 MEM w W SUPPRESSED MODRM_RM
3 BASE1 REG R SUPPRESSED
4 SEG1 REG (=ES) R SUPPRESSED
5 REG1 REG R EXPLICIT MODRM_REG
6 MEM2 MEM R EXPLICIT MODRM_RM
7 MEM3 MEM w W SUPPRESSED MODRM_RM
8 BASE1 REG R SUPPRESSED

Micro-ops sequence (0)

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