def getBitWidth(registerMap):
    """
        Return the bit width (32 or 64 bit) given the registers

        @type registerMap: map
        @param registerMap: Map of register names to value

        @rtype: int
        @return: The bit width
    """
    if 'rax' in registerMap or 'x0' in registerMap:
        return 64
    return 32
