Proper way to get the length of operand

[taoyu028]

I am trying to get the length of operands in compare instructions. I have tried to use

register = instr.getRegister(0)
print(register.getBitLength())

However, for the case (X86-64) like

CMP  dword ptr [RSP + local_9c],0x2

outputs 64 instead of the expected value 32

I couldn't find the proper function to use to get the length of an operand. Maybe someone here can help? Thanks!

[taoyu028]

Does anyone know which function should I use to check whether an operand is a byte pointer or word pointer or qword ptr?