mirror of
https://github.com/YosysHQ/yosys
synced 2025-11-04 05:19:11 +00:00
53 lines
987 B
Text
53 lines
987 B
Text
read_verilog <<EOF
|
|
(* blackbox *)
|
|
(* gate_cost_equivalent=150 *)
|
|
module macro;
|
|
endmodule
|
|
|
|
module branch1;
|
|
macro inst1();
|
|
macro inst2();
|
|
macro inst3();
|
|
endmodule
|
|
|
|
module branch2;
|
|
macro inst1();
|
|
macro inst2();
|
|
macro inst3();
|
|
macro inst4();
|
|
endmodule
|
|
|
|
// branch3_submod on its own doesn't meet the threshold
|
|
module branch3_submod();
|
|
wire [2:0] y;
|
|
wire [2:0] a;
|
|
wire [2:0] b;
|
|
assign y = a * b;
|
|
endmodule
|
|
|
|
// on the other hand four branch3_submods do
|
|
module branch3;
|
|
branch3_submod inst1();
|
|
branch3_submod inst2();
|
|
branch3_submod inst3();
|
|
branch3_submod inst4();
|
|
endmodule
|
|
|
|
// wrapper should have zero cost when branch3 is marked
|
|
// keep_hierarchy
|
|
module branch3_wrapper;
|
|
branch3 inst();
|
|
endmodule
|
|
|
|
module top;
|
|
branch1 inst1();
|
|
branch2 inst2();
|
|
branch3_wrapper wrapper();
|
|
endmodule
|
|
EOF
|
|
|
|
hierarchy -top top
|
|
keep_hierarchy -min_cost 500
|
|
select -assert-mod-count 2 A:keep_hierarchy
|
|
select -assert-any A:keep_hierarchy branch2 %i
|
|
select -assert-any A:keep_hierarchy branch3 %i
|