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This option allows you to process a design that includes unsupported SVA. Unsupported SVA gets imported as formal cells using 'x inputs and with the `unsupported_sva` attribute set. This allows you to get a complete list of defined properties or to check only a supported subset of properties. To ensure no properties are unintentionally skipped for actual verification, even in cases where `-sva-continue-on-error` is used by default to read and inspect a design, `hierarchy -simcheck` and `hierarchy -smtcheck` (run by SBY) now ensure that no `unsupported_sva` property cells remain in the design.
38 lines
1.5 KiB
Text
38 lines
1.5 KiB
Text
verific -sv <<EOF
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module top(input clk, input a, input b);
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prop_supported: assert property (@(posedge clk) a ##1 b |=> b);
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prop_unsupported1: assert property (@(posedge clk) a ##1 b #=# b);
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prop_unsupported2: assert property (@(posedge clk) a ##1 @(posedge b) ##1 a);
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sequence local_var_seq;
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logic v;
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(1, v = a) ##1 b ##1 (v == a);
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endsequence
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prop_unsupported3: assert property (@(posedge clk) local_var_seq);
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endmodule
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EOF
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logger -expect warning "Mixed clocking is currently not supported" 1
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logger -expect warning "Verific SVA primitive sva_non_overlapped_followed_by .* is currently unsupported in this context" 1
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logger -expect warning "SVA sequences with local variable assignments are currently not supported" 1
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logger -expect warning "Encountered 3 items containing unsupported SVA" 1
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verific -import -sva-continue-on-err top
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logger -check-expected
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select -assert-count 4 top/t:$assert
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select -assert-count 4 top/a:unsupported_sva top/prop_supported %% top/t:$assert %i
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select -assert-count 3 top/a:unsupported_sva
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select -assert-count 3 top/a:unsupported_sva top/prop_unsupported* %i
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select -assert-count 1 top/a:unsupported_sva top/prop_unsupported1 %i
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select -assert-count 1 top/a:unsupported_sva top/prop_unsupported2 %i
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select -assert-count 1 top/a:unsupported_sva top/prop_unsupported3 %i
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select -assert-count 0 top/a:unsupported_sva top/prop_supported %i
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select -assert-count 1 top/prop_supported
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logger -expect error "uses unsupported SVA constructs." 1
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hierarchy -smtcheck -top top
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logger -check-expected
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