Attempting to decode: f2 0f 12 c0 
iclass MOVDDUP	category DATAXFER	ISA-extension SSE3	ISA-set SSE3
instruction-length 4
operand-width 32
effective-operand-width 32
effective-address-width 32
stack-address-width 32
iform-enum-name MOVDDUP_XMMdq_XMMq
iform-enum-name-dispatch (zero based) 1
iclass-max-iform-dispatch 2
Nominal opcode position 2
Nominal opcode 0x12
Operands
#   TYPE               DETAILS        VIS  RW       OC2 BITS BYTES NELEM ELEMSZ   ELEMTYPE   REGCLASS
#   ====               =======        ===  ==       === ==== ===== ===== ======   ========   ========
0   REG0             REG0=XMM0   EXPLICIT   W        DQ  128    16     4     32        INT        XMM
1   REG1             REG1=XMM0   EXPLICIT   R         Q   64     8     1     64        INT        XMM
Memory Operands
  MemopBytes = 0
ATTRIBUTES: 
F2 PREFIX
EXCEPTION TYPE: SSE_TYPE_5
SSE
Vector length: 128
Number of legacy prefixes: 1 
ISA SET: [SSE3]
0	CPUID GROUP NAME: [SSE3]
	0	CPUID RECORD NAME: [SSE3]
		{Leaf 0x00000001, subleaf 0x00000000, ECX[0:0]} = 1