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yosys/tests/csa_tree/csa_tree_idempotent.ys
2026-03-18 12:36:31 +01:00

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read_verilog <<EOT
module add8(
input [15:0] a, b, c, d, e, f, g, h,
output [15:0] y
);
assign y = a + b + c + d + e + f + g + h;
endmodule
EOT
hierarchy -auto-top
proc
csa_tree
select -assert-count 6 t:$fa
select -assert-count 1 t:$add
csa_tree
select -assert-count 6 t:$fa
select -assert-count 1 t:$add
select -assert-none t:$sub