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verific: New -sva-continue-on-error import option

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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.
This commit is contained in:
Jannis Harder 2025-09-24 18:47:54 +02:00
parent 99a23c777c
commit 83dd99efb7
6 changed files with 124 additions and 25 deletions
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38
tests/verific/sva_continue_on_err.ys Normal file
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verific -sv <<EOF
module top(input clk, input a, input b);
prop_supported: assert property (@(posedge clk) a ##1 b |=> b);
prop_unsupported1: assert property (@(posedge clk) a ##1 b #=# b);
prop_unsupported2: assert property (@(posedge clk) a ##1 @(posedge b) ##1 a);
sequence local_var_seq;
logic v;
(1, v = a) ##1 b ##1 (v == a);
endsequence
prop_unsupported3: assert property (@(posedge clk) local_var_seq);
endmodule
EOF
logger -expect warning "Mixed clocking is currently not supported" 1
logger -expect warning "Verific SVA primitive sva_non_overlapped_followed_by .* is currently unsupported in this context" 1
logger -expect warning "SVA sequences with local variable assignments are currently not supported" 1
logger -expect warning "Encountered 3 items containing unsupported SVA" 1
verific -import -sva-continue-on-err top
logger -check-expected
select -assert-count 4 top/t:$assert
select -assert-count 4 top/a:unsupported_sva top/prop_supported %% top/t:$assert %i
select -assert-count 3 top/a:unsupported_sva
select -assert-count 3 top/a:unsupported_sva top/prop_unsupported* %i
select -assert-count 1 top/a:unsupported_sva top/prop_unsupported1 %i
select -assert-count 1 top/a:unsupported_sva top/prop_unsupported2 %i
select -assert-count 1 top/a:unsupported_sva top/prop_unsupported3 %i
select -assert-count 0 top/a:unsupported_sva top/prop_supported %i
select -assert-count 1 top/prop_supported
logger -expect error "uses unsupported SVA constructs." 1
hierarchy -smtcheck -top top
logger -check-expected

9
tests/verific/sva_no_continue_on_err.ys Normal file
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verific -sv <<EOF
module top(input clk, input a, input b);
prop_unsupported: assert property (@(posedge clk) a ##1 @(posedge b) ##1 a);
endmodule;
EOF
logger -expect error "Mixed clocking is currently not supported" 1
verific -import top