.model h_u_cska8
.inputs a[0] a[1] a[2] a[3] a[4] a[5] a[6] a[7] b[0] b[1] b[2] b[3] b[4] b[5] b[6] b[7]
.outputs h_u_cska8_out[0] h_u_cska8_out[1] h_u_cska8_out[2] h_u_cska8_out[3] h_u_cska8_out[4] h_u_cska8_out[5] h_u_cska8_out[6] h_u_cska8_out[7] h_u_cska8_out[8]
.names vdd
1
.names gnd
0
.subckt xor_gate a=a[0] b=b[0] out=h_u_cska8_xor0
.subckt ha a=a[0] b=b[0] ha_xor0=h_u_cska8_ha0_xor0 ha_and0=h_u_cska8_ha0_and0
.subckt xor_gate a=a[1] b=b[1] out=h_u_cska8_xor1
.subckt fa a=a[1] b=b[1] cin=h_u_cska8_ha0_and0 fa_xor1=h_u_cska8_fa0_xor1 fa_or0=h_u_cska8_fa0_or0
.subckt xor_gate a=a[2] b=b[2] out=h_u_cska8_xor2
.subckt fa a=a[2] b=b[2] cin=h_u_cska8_fa0_or0 fa_xor1=h_u_cska8_fa1_xor1 fa_or0=h_u_cska8_fa1_or0
.subckt xor_gate a=a[3] b=b[3] out=h_u_cska8_xor3
.subckt fa a=a[3] b=b[3] cin=h_u_cska8_fa1_or0 fa_xor1=h_u_cska8_fa2_xor1 fa_or0=h_u_cska8_fa2_or0
.subckt and_gate a=h_u_cska8_xor0 b=h_u_cska8_xor2 out=h_u_cska8_and_propagate00
.subckt and_gate a=h_u_cska8_xor1 b=h_u_cska8_xor3 out=h_u_cska8_and_propagate01
.subckt and_gate a=h_u_cska8_and_propagate00 b=h_u_cska8_and_propagate01 out=h_u_cska8_and_propagate02
.subckt mux2to1 d0=h_u_cska8_fa2_or0 d1=gnd sel=h_u_cska8_and_propagate02 mux2to1_xor0=h_u_cska8_mux2to10_and1
.subckt xor_gate a=a[4] b=b[4] out=h_u_cska8_xor4
.subckt fa a=a[4] b=b[4] cin=h_u_cska8_mux2to10_and1 fa_xor1=h_u_cska8_fa3_xor1 fa_or0=h_u_cska8_fa3_or0
.subckt xor_gate a=a[5] b=b[5] out=h_u_cska8_xor5
.subckt fa a=a[5] b=b[5] cin=h_u_cska8_fa3_or0 fa_xor1=h_u_cska8_fa4_xor1 fa_or0=h_u_cska8_fa4_or0
.subckt xor_gate a=a[6] b=b[6] out=h_u_cska8_xor6
.subckt fa a=a[6] b=b[6] cin=h_u_cska8_fa4_or0 fa_xor1=h_u_cska8_fa5_xor1 fa_or0=h_u_cska8_fa5_or0
.subckt xor_gate a=a[7] b=b[7] out=h_u_cska8_xor7
.subckt fa a=a[7] b=b[7] cin=h_u_cska8_fa5_or0 fa_xor1=h_u_cska8_fa6_xor1 fa_or0=h_u_cska8_fa6_or0
.subckt and_gate a=h_u_cska8_xor4 b=h_u_cska8_xor6 out=h_u_cska8_and_propagate13
.subckt and_gate a=h_u_cska8_xor5 b=h_u_cska8_xor7 out=h_u_cska8_and_propagate14
.subckt and_gate a=h_u_cska8_and_propagate13 b=h_u_cska8_and_propagate14 out=h_u_cska8_and_propagate15
.subckt mux2to1 d0=h_u_cska8_fa6_or0 d1=h_u_cska8_mux2to10_and1 sel=h_u_cska8_and_propagate15 mux2to1_xor0=h_u_cska8_mux2to11_xor0
.names h_u_cska8_ha0_xor0 h_u_cska8_out[0]
1 1
.names h_u_cska8_fa0_xor1 h_u_cska8_out[1]
1 1
.names h_u_cska8_fa1_xor1 h_u_cska8_out[2]
1 1
.names h_u_cska8_fa2_xor1 h_u_cska8_out[3]
1 1
.names h_u_cska8_fa3_xor1 h_u_cska8_out[4]
1 1
.names h_u_cska8_fa4_xor1 h_u_cska8_out[5]
1 1
.names h_u_cska8_fa5_xor1 h_u_cska8_out[6]
1 1
.names h_u_cska8_fa6_xor1 h_u_cska8_out[7]
1 1
.names h_u_cska8_mux2to11_xor0 h_u_cska8_out[8]
1 1
.end

.model mux2to1
.inputs d0 d1 sel
.outputs mux2to1_xor0
.names vdd
1
.names gnd
0
.subckt and_gate a=d1 b=sel out=mux2to1_and0
.subckt not_gate a=sel out=mux2to1_not0
.subckt and_gate a=d0 b=mux2to1_not0 out=mux2to1_and1
.subckt xor_gate a=mux2to1_and0 b=mux2to1_and1 out=mux2to1_xor0
.end

.model fa
.inputs a b cin
.outputs fa_xor1 fa_or0
.names vdd
1
.names gnd
0
.subckt xor_gate a=a b=b out=fa_xor0
.subckt and_gate a=a b=b out=fa_and0
.subckt xor_gate a=fa_xor0 b=cin out=fa_xor1
.subckt and_gate a=fa_xor0 b=cin out=fa_and1
.subckt or_gate a=fa_and0 b=fa_and1 out=fa_or0
.end

.model ha
.inputs a b
.outputs ha_xor0 ha_and0
.names vdd
1
.names gnd
0
.subckt xor_gate a=a b=b out=ha_xor0
.subckt and_gate a=a b=b out=ha_and0
.end

.model not_gate
.inputs a
.outputs out
.names vdd
1
.names gnd
0
.names a out
0 1
.end

.model or_gate
.inputs a b
.outputs out
.names vdd
1
.names gnd
0
.names a b out
1- 1
-1 1
.end

.model and_gate
.inputs a b
.outputs out
.names vdd
1
.names gnd
0
.names a b out
11 1
.end

.model xor_gate
.inputs a b
.outputs out
.names vdd
1
.names gnd
0
.names a b out
01 1
10 1
.end