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Merge pull request #2995 from georgerennie/cover_precond

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chformal: Add -coverenable option
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Jannis Harder 2023-02-14 17:46:31 +01:00 • committed by GitHub
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tests/various/chformal_coverenable.ys Normal file
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read_verilog -formal <<EOT
module top(input a, b, c, d);
always @* begin
if (a) assert (b == c);
if (!a) assert (b != c);
if (b) assume (c);
if (c) cover (d);
end
endmodule
EOT
prep -top top
select -assert-count 1 t:$cover
chformal -cover -coverenable
select -assert-count 2 t:$cover
chformal -assert -coverenable
select -assert-count 4 t:$cover
chformal -assume -coverenable
select -assert-count 5 t:$cover