# ADDER8 (Half adder)
# Half adder: 8 bits adder from reducing a 9-bits adder to 8 bits
# Input:  a7, a6, a5, a4, a3, a2, a1, a0,  b7, b6, b5, b4, b3, b2, b1, b0
# Output: y8, y7, y6, y5, y4, y3, y2, y1, y0

#equivalent to: for i in expand("a<7:0>;b<7:0>"):
#    Gate(i, type="inp")
GATE("a<7:0>;b<7:0>", type="inp")
GATE("y<8:0>", type="out")
GATE("g0", type="zero")
GATE("ad9", type="adder9")

WIRE("a<0:7>", "ad9/a<0:7>")
WIRE("b<0:7>", "ad9/b<0:7>")
WIRE("ad9/y<0:8>", "y<0:8>")
WIRE("g0", "ad9/a8")
WIRE("g0", "ad9/b8")
WIRE("g0", "ad9/cin")