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Merge pull request #4724 from YosysHQ/micko/blackbox_verific 

verific: fix blackbox regression and add test case
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Miodrag Milanović 2024-11-25 15:06:54 +01:00 committed by GitHub
parent 9512ec4bbc df391f5816
commit 29e8812bab
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2 changed files with 25 additions and 0 deletions
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1
frontends/verific/verific.cc
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@ -3422,6 +3422,7 @@ struct VerificPass : public Pass {
RuntimeFlags::SetVar("veri_preserve_assignments", 1);
RuntimeFlags::SetVar("veri_preserve_comments", 1);
RuntimeFlags::SetVar("veri_preserve_drivers", 1);
RuntimeFlags::SetVar("veri_create_empty_box", 1);
// Workaround for VIPER #13851
RuntimeFlags::SetVar("veri_create_name_for_unnamed_gen_block", 1);

24
tests/verific/blackbox.ys Normal file
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@ -0,0 +1,24 @@
verific -sv -lib <<EOF
module TEST_CELL(input clk, input a, input b, output reg c);
parameter PATH = "DEFAULT";
always @(posedge clk) begin
if (PATH=="DEFAULT")
c <= a;
else
c <= b;
end
endmodule
EOF
verific -sv <<EOF
module top(input clk, input a, input b, output c, output d);
TEST_CELL #(.PATH("TEST")) test1(.clk(clk),.a(a),.b(1'b1),.c(c));
TEST_CELL #(.PATH("DEFAULT")) test2(.clk(clk),.a(a),.b(1'bx),.c(d));
endmodule
EOF
verific -import top
hierarchy -top top
stat
select -assert-count 2 t:TEST_CELL