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yosys/tests/various/signext.ys
2019-06-20 10:13:52 -07:00

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read_verilog -formal <<EOT
module gate(input clk, output [1:0] o);
assign o = 1'bx;
endmodule
EOT
## Example usage for "pmuxtree" and "muxcover"
proc
## Equivalence checking
read_verilog -formal <<EOT
module gold(input clk, output [1:0] o);
assign o = 2'bxx;
endmodule
EOT
proc
miter -equiv -flatten -make_assert -make_outputs gold gate miter
sat -verify -prove-asserts -show-ports -enable_undef miter