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📁 这是一本关于verilog编程语言的教程,对学习verilog语言有帮助
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A.2.11 Covergroup declarations</div>
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covergroup_declaration ::=&nbsp;</p>
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covergroup covergroup_identifier [ ( [ tf_port_list ] ) ] [ coverage_event ] ;&nbsp;</p>
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{ coverage_spec_or_option ; }&nbsp;</p>
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endgroup [ : covergroup_identifier ]&nbsp;</p>
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coverage_spec_or_option ::=&nbsp;</p>
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{attribute_instance} coverage_spec&nbsp;</p>
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| {attribute_instance} coverage_option ;&nbsp;</p>
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coverage_option ::=&nbsp;</p>
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option.member_identifier = expression&nbsp;</p>
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| type_option.member_identifier = expression&nbsp;</p>
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coverage_spec ::=&nbsp;</p>
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cover_point&nbsp;</p>
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| cover_cross&nbsp;</p>
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coverage_event ::=&nbsp;</p>
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clocking_event&nbsp;</p>
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| @@( block_event_expression )&nbsp;</p>
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block_event_expression :: =&nbsp;</p>
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block_event_expression or block_event_expression&nbsp;</p>
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| begin hierarchical_btf_identifier&nbsp;</p>
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| end hierarchical_btf_identifier&nbsp;</p>
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hierarchical_btf_identifier :: =&nbsp;</p>
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hierarchical_tf_identifier&nbsp;</p>
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| hierarchical_block_identifier&nbsp;</p>
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| hierarchical _identifier [ class_scope ] method_identifier&nbsp;</p>
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cover_point ::= [ cover_point_identifer : ] coverpoint expression [ iff ( expression ) ] bins_or_empty&nbsp;</p>
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bins_or_empty ::=&nbsp;</p>
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{ {attribute_instance} { bins_or_options ; } }&nbsp;</p>
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| ;&nbsp;</p>
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bins_or_options ::=&nbsp;</p>
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coverage_option&nbsp;</p>
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| [ wildcard ] bins_keyword bin_identifier [ [ [ expression ] ] ] = { range_list } [ iff ( expression ) ]&nbsp;</p>
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| [ wildcard] bins_keyword bin_identifier [ [ ] ] = trans_list [ iff ( expression ) ]&nbsp;</p>
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| bins_keyword bin_identifier [ [ [ expression ] ] ] = default [ iff ( expression ) ]&nbsp;</p>
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| bins_keyword bin_identifier = default sequence [ iff ( expression ) ]&nbsp;</p>
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bins_keyword::= bins | illegal_bins | ignore_bins&nbsp;</p>
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range_list ::= value_range { , value_range }&nbsp;</p>
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trans_list ::= ( trans_set ) { , ( trans_set ) }&nbsp;</p>
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trans_set ::= trans_range_list =&gt; trans_range_list { =&gt; trans_range_list }&nbsp;</p>
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trans_range_list ::=&nbsp;</p>
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trans_item&nbsp;</p>
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| trans_item [ [* repeat_range ] ]&nbsp;</p>
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| trans_item [ [–&gt; repeat_range ] ]&nbsp;</p>
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| trans_item [ [= repeat_range ] ]&nbsp;</p>
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trans_item ::= range_list&nbsp;</p>
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repeat_range ::=&nbsp;</p>
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expression&nbsp;</p>
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| expression : expression&nbsp;</p>
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cover_cross ::= [cover_point_identifer : ] cross list_of_coverpoints [ iff ( expression ) ] select_bins_or_empty&nbsp;</p>
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list_of_coverpoints ::= cross_item , cross_item { , cross_item }&nbsp;</p>
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cross_item ::=&nbsp;</p>
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cover_point_identifier&nbsp;</p>
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| variable_identifier&nbsp;</p>
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select_bins_or_empty ::=&nbsp;</p>
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{ { bins_selections_or_option ; } }&nbsp;</p>
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| ;&nbsp;</p>
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bins_selection_or_option ::=&nbsp;</p>
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{ attribute_instance } coverage_option&nbsp;</p>
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| { attribute_instance } bins_selection&nbsp;</p>
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bins_selection ::= bins_keyword bin_identifier = select_expression [ iff ( expression ) ]&nbsp;</p>
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select_expression ::=&nbsp;</p>
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select_condition&nbsp;</p>
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| ! select_condition&nbsp;</p>
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| select_expression &amp;&amp; select_expression&nbsp;</p>
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| select_expression || select_expression&nbsp;</p>
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| ( select_expression )&nbsp;</p>
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select_condition ::= binsof ( bins_expression ) [ intersect { open_range_list } ]&nbsp;</p>
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bins_expression ::=&nbsp;</p>
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variable_identifier&nbsp;</p>
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| cover_point_identifier [ . bins_identifier ]&nbsp;</p>
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open_range_list ::= open_value_range { , open_value_range }&nbsp;</p>
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open_value_range ::= value_range21</p></div>
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