public static void setThumbBit(ObjectiveC1_State state, Address address) {
		if (state.thumbCodeLocations.contains(address)) {
			Register tmodeRegister = state.program.getLanguage().getRegister("TMode");
			if (tmodeRegister != null) {
				Command<Program> c =
					new SetRegisterCmd(tmodeRegister, address, address, BigInteger.valueOf(1));
				c.applyTo(state.program);
			}
		}
	}
If needed, sets the TMode bit at the specified address.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/objectiveC/ObjectiveC1_Utilities.java