yosys/tests/techmap/abc9.ys

read_verilog <<EOT
`define N 256
module top(input [`N-1:0] a, output o);
wire [`N-2:0] w;
assign w[0] = a[0] & a[1];
genvar i;
generate for (i = 1; i < `N-1; i++)
assign w[i] = w[i-1] & a[i+1];
endgenerate
assign o = w[`N-2];
endmodule
EOT
simplemap
dump
design -save gold

abc9 -lut 4

design -load gold
abc9 -lut 4 -fast

design -load gold
scratchpad -copy abc9.script.default.area abc9.script
abc9 -lut 4

design -load gold
scratchpad -copy abc9.script.default.fast abc9.script
abc9 -lut 4

design -load gold
scratchpad -copy abc9.script.flow abc9.script
abc9 -lut 4

design -load gold
scratchpad -copy abc9.script.flow2 abc9.script
abc9 -lut 4

design -load gold
scratchpad -copy abc9.script.flow3 abc9.script
abc9 -lut 4

design -reset
read_verilog <<EOT
module top(input a, b, output o);
(* keep *) wire w = a & b;
assign o = ~w;
endmodule
EOT

simplemap
equiv_opt -assert abc9 -lut 4
design -load postopt
select -assert-count 2 t:$lut


design -reset
read_verilog -icells <<EOT
module top(input a, b, output o);
wire w;
(* keep *) $_AND_ gate (.Y(w), .A(a), .B(b));
assign o = ~w;
endmodule
EOT

simplemap
equiv_opt -assert abc9 -lut 4
design -load postopt
select -assert-count 1 t:$lut
select -assert-count 1 t:$_AND_


design -reset
read_verilog -icells <<EOT
module top(input a, b, output o);
assign o = ~(a & b);
endmodule
EOT
abc9 -lut 4
clean
select -assert-count 1 t:$lut
select -assert-none t:$lut t:* %D