hLib = RTW.TflTable;

% Create an entry for addition of built-in uint8 data type
op_entry = RTW.TflCOperationEntry;
op_entry.setTflCOperationEntryParameters( ...
    'Key',                      'RTW_OP_ADD', ...
    'Priority',                 90, ...
    'SaturationMode',           'RTW_SATURATE_ON_OVERFLOW', ...
    'RoundingModes',            {'RTW_ROUND_UNSPECIFIED'}, ...
    'ImplementationName',       'u8_add_u8_u8', ...
    'ImplementationHeaderFile', 'u8_add_u8_u8.h', ...
    'ImplementationSourceFile', 'u8_add_u8_u8.c' );

arg = hLib.getTflArgFromString('y1','uint8');
arg.IOType = 'RTW_IO_OUTPUT';
op_entry.addConceptualArg(arg);

arg = hLib.getTflArgFromString('u1','uint8');
op_entry.addConceptualArg(arg);

arg = hLib.getTflArgFromString('u2','uint8');
op_entry.addConceptualArg(arg);

op_entry.copyConceptualArgsToImplementation();

addEntry(hLib, op_entry);