Actually I misspoke, it's a full adder and very similar to the one on page 5 here https://www.cerc.utexas.edu/~jaa/vlsi/lectures/8-1.pdf https://www.cerc.utexa

Actually I misspoke, it's a full adder and very similar to the one on page 5 here https://www.cerc.utexas.edu/~jaa/vlsi/lectures/8-1.pdf https://www.cerc.utexas.edu/~jaa/vlsi/lectures/8-1.pdf