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Add $cover cell type and SVA cover() support

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This commit is contained in:
Clifford Wolf 2017-02-04 14:14:26 +01:00
parent 911c44d164
commit 3928482a3c
14 changed files with 38 additions and 9 deletions
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1
frontends/verilog/verilog_lexer.l
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@ -177,6 +177,7 @@ YOSYS_NAMESPACE_END
"assert" { if (formal_mode) return TOK_ASSERT; SV_KEYWORD(TOK_ASSERT); }
"assume" { if (formal_mode) return TOK_ASSUME; SV_KEYWORD(TOK_ASSUME); }
"cover" { if (formal_mode) return TOK_COVER; SV_KEYWORD(TOK_COVER); }
"restrict" { if (formal_mode) return TOK_RESTRICT; SV_KEYWORD(TOK_RESTRICT); }
"property" { if (formal_mode) return TOK_PROPERTY; SV_KEYWORD(TOK_PROPERTY); }
"logic" { SV_KEYWORD(TOK_REG); }

8
frontends/verilog/verilog_parser.y
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@ -114,7 +114,7 @@ static void free_attr(std::map<std::string, AstNode*> *al)
%token TOK_SYNOPSYS_FULL_CASE TOK_SYNOPSYS_PARALLEL_CASE
%token TOK_SUPPLY0 TOK_SUPPLY1 TOK_TO_SIGNED TOK_TO_UNSIGNED
%token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_ASSERT TOK_ASSUME
%token TOK_RESTRICT TOK_PROPERTY TOK_ENUM TOK_TYPEDEF
%token TOK_RESTRICT TOK_COVER TOK_PROPERTY TOK_ENUM TOK_TYPEDEF
%type <ast> range range_or_multirange non_opt_range non_opt_multirange range_or_signed_int
%type <ast> wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list
@ -1000,6 +1000,9 @@ assert:
TOK_ASSUME '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $3));
} |
TOK_COVER '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_COVER, $3));
} |
TOK_RESTRICT '(' expr ')' ';' {
if (norestrict_mode)
delete $3;
@ -1014,6 +1017,9 @@ assert_property:
TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
} |
TOK_COVER TOK_PROPERTY '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_COVER, $4));
} |
TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' {
if (norestrict_mode)
delete $4;