question: private static Pair < String , String > offsetImm ( final long offset , final ITranslationEnvironment environment , final List < ReilInstruction > instructions , final String registerNodeValue , final String immediateNodeValue ) { final String address = environment . getNextVariableString ( ) ; final String tmpVar1 = environment . getNextVariableString ( ) ; long baseOffset = offset ; instructions . add ( ReilHelpers . createAdd ( baseOffset ++ , dw , registerNodeValue , dw , immediateNodeValue , dw , tmpVar1 ) ) ; instructions . add ( ReilHelpers . createAnd ( baseOffset ++ , dw , tmpVar1 , dw , dWordBitMask , dw , address ) ) ; return new Pair < String , String > ( address , registerNodeValue ) ; }
target:  [<Rn>, #+/-<offset_12>] Operation: if U == 1 then address = Rn + offset_12 else / U == 0 / address = Rn - offset_12