Read the description of the Tiger parser on pages 83-84. To find out details of Tiger's syntax, you will also need to refer to the Appendix on pages 522-531. You can view the CUP reference manual at http://www.cs.princeton.edu/~appel/modern/java/CUP/.
My /homes/smithg/javatools/tiger/chap3 directory contains a number of files to help you. You just need to copy your Tiger.lex into Parse/, complete Grm.cup, and run make. Then you can run your parser by typing
java Parse.Main example.tig
Here are a few remarks:
parser.debug_parse();This causes CUP to output the sequence of shifts and reduces that it makes in parsing the input. (Unfortunately the output isn't very readable.)