Attempting to decode: 0f 12 c0 iclass MOVHLPS category DATAXFER ISA-extension SSE ISA-set SSE instruction-length 3 operand-width 32 effective-operand-width 32 effective-address-width 32 stack-address-width 32 iform-enum-name MOVHLPS_XMMq_XMMq iform-enum-name-dispatch (zero based) 0 iclass-max-iform-dispatch 1 Nominal opcode position 1 Nominal opcode 0x12 Operands # TYPE DETAILS VIS RW OC2 BITS BYTES NELEM ELEMSZ ELEMTYPE REGCLASS # ==== ======= === == === ==== ===== ===== ====== ======== ======== 0 REG0 REG0=XMM0 EXPLICIT RW Q 64 8 2 32 SINGLE XMM 1 REG1 REG1=XMM0 EXPLICIT R Q 64 8 2 32 SINGLE XMM Memory Operands MemopBytes = 0 ATTRIBUTES: EXCEPTION TYPE: SSE_TYPE_7 SSE Vector length: 128 ISA SET: [SSE] 0 CPUID GROUP NAME: [SSE] 0 CPUID RECORD NAME: [SSE] {Leaf 0x00000001, subleaf 0x00000000, EDX[25:25]} = 1