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| author | Clifford Wolf <clifford@clifford.at> | 2017-02-23 16:33:19 +0100 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2017-02-23 16:33:19 +0100 |
| commit | 00dba4c197b7e3b6c1d1f7b90ae7b1e6172b1e5f (patch) | |
| tree | 552c7c6bdf17dcae25439f8c1b32df1960da1b35 /frontends/verilog/verilog_parser.y | |
| parent | 1e927a51d575c19b85db2c73ff70d8a244eb1fb5 (diff) | |
| download | yosys-00dba4c197b7e3b6c1d1f7b90ae7b1e6172b1e5f.tar.gz yosys-00dba4c197b7e3b6c1d1f7b90ae7b1e6172b1e5f.tar.bz2 yosys-00dba4c197b7e3b6c1d1f7b90ae7b1e6172b1e5f.zip | |
Add support for SystemVerilog unique, unique0, and priority case
Diffstat (limited to 'frontends/verilog/verilog_parser.y')
| -rw-r--r-- | frontends/verilog/verilog_parser.y | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y index 7c2880e4e..9b2498694 100644 --- a/frontends/verilog/verilog_parser.y +++ b/frontends/verilog/verilog_parser.y @@ -117,13 +117,13 @@ static void free_attr(std::map<std::string, AstNode*> *al) %token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_ASSERT TOK_ASSUME %token TOK_RESTRICT TOK_COVER TOK_PROPERTY TOK_ENUM TOK_TYPEDEF %token TOK_RAND TOK_CONST TOK_CHECKER TOK_ENDCHECKER -%token TOK_INCREMENT TOK_DECREMENT +%token TOK_INCREMENT TOK_DECREMENT TOK_UNIQUE TOK_PRIORITY %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 %type <string> opt_label tok_prim_wrapper hierarchical_id -%type <boolean> opt_signed -%type <al> attr +%type <boolean> opt_signed unique_case_attr +%type <al> attr case_attr // operator precedence from low to high %left OP_LOR @@ -1167,7 +1167,7 @@ behavioral_stmt: ast_stack.pop_back(); ast_stack.pop_back(); } | - attr case_type '(' expr ')' { + case_attr case_type '(' expr ')' { AstNode *node = new AstNode(AST_CASE, $4); ast_stack.back()->children.push_back(node); ast_stack.push_back(node); @@ -1177,6 +1177,23 @@ behavioral_stmt: ast_stack.pop_back(); }; +unique_case_attr: + /* empty */ { + $$ = false; + } | + TOK_PRIORITY case_attr { + $$ = $2; + } | + TOK_UNIQUE case_attr { + $$ = true; + }; + +case_attr: + attr unique_case_attr { + if ($2) (*$1)["\\parallel_case"] = AstNode::mkconst_int(1, false); + $$ = $1; + }; + case_type: TOK_CASE { case_type_stack.push_back(0); |