Attempting to decode: 62 54 f5 02 39 c8 
iclass CCMPB	category APX	ISA-extension APXEVEX	ISA-set APX_F
instruction-length 6
operand-width 64
effective-operand-width 64
effective-address-width 64
stack-address-width 64
iform-enum-name CCMPB_GPRv_GPRv_DFV_APX
iform-enum-name-dispatch (zero based) 3
iclass-max-iform-dispatch 12
Nominal opcode position 4
Nominal opcode 0x39
Operands
#   TYPE               DETAILS        VIS  RW       OC2 BITS BYTES NELEM ELEMSZ   ELEMTYPE   REGCLASS
#   ====               =======        ===  ==       === ==== ===== ===== ======   ========   ========
0   REG0               REG0=R8   EXPLICIT   R         V   64     8     1     64        INT        GPR
1   REG1               REG1=R9   EXPLICIT   R         V   64     8     1     64        INT        GPR
2   REG2            REG2=DFV14   EXPLICIT   R   INVALID    4     1     1      4        INT     PSEUDO
3   REG3           REG3=RFLAGS SUPPRESSED   W         Y   64     8     1     64        INT      FLAGS
Memory Operands
  MemopBytes = 0
FLAGS:
  must-write-rflags of-mod sf-mod zf-mod af-mod pf-mod cf-mod 
       read:                                mask=0x0
    written:             of sf zf af pf cf  mask=0x8d5
  undefined:                                mask=0x0
    default:             of=1, sf=1, zf=1, cf=0
ATTRIBUTES: SCALABLE 
66-OSZ PREFIX
MANDATORY 66 PREFIX
EXCEPTION TYPE: APX_EVEX_CCMP
[APX] 
ISA SET: [APX_F]
0	CPUID GROUP NAME: [APX_F]
	0	CPUID RECORD NAME: [APX_F]
		{Leaf 0x00000007, subleaf 0x00000001, EDX[21:21]} = 1