code: def _setup_arm_arch(self, arch_mode=None):
          
          if arch_mode is None:
              arch_mode = ARCH_ARM_MODE_THUMB
  
          self.name = "ARM"
          self.arch_info = ArmArchitectureInformation(arch_mode)
          self.disassembler = ArmDisassembler(architecture_mode=arch_mode)
          self.ir_translator = ArmTranslator(architecture_mode=arch_mode)
docs: Set up ARM architecture.