I see. I guess I had the impression that the carry and sum bits had been used directly to index the table, which is of course a thing you can do; it's just tha

I see. I guess I had the impression that the carry and sum bits had been used directly to index the table, which is of course a thing you can do; it's just that 7 bits in the carry-save adder is the equivalent of ≈3 bits.