Parallel MAC unit based on modified booth algorithm [Help needed]

The below diagram is the parallel MAC structure. In parallel MAC both partial product addition and accumulation take place at same time. aYJKo.jpg The partial product summation + accumulation unit of above parallel mac is given below.http://i.imgur.com/Jd8WIyD.jpg (link to the image). qIftF.jpg My problem : When I give input to multiplier as 00000101(5) and 00001000(8) what will be the values produced(P0[7:0],P1[7:0],P2[7:0],P3[7:0] And S0,S1,S2,S3 And N0,N1,N2,N3 that can be used as input of partial product generation + accumulation stage. The complete document is shared below. Please share your ideas.I need to continue my project based on your replies. Thanks.
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