mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-04-27 02:45:52 +00:00
Code Activity

Implemented indexed part selects

Browse source
This commit is contained in:
Clifford Wolf 2013-11-20 13:05:27 +01:00
parent c4c299eb5a
commit 92035fb38e
4 changed files with 19 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

3
frontends/verilog/lexer.l
View file

@ -249,6 +249,9 @@ supply1 { return TOK_SUPPLY1; }
"<<<" { return OP_SSHL; }
">>>" { return OP_SSHR; }
"+:" { return TOK_POS_INDEXED; }
"-:" { return TOK_NEG_INDEXED; }
"/*" { BEGIN(COMMENT); }
<COMMENT>. /* ignore comment body */
<COMMENT>\n /* ignore comment body */

11
frontends/verilog/parser.y
View file

@ -104,6 +104,7 @@ static void free_attr(std::map<std::string, AstNode*> *al)
%token TOK_GENERATE TOK_ENDGENERATE TOK_GENVAR
%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
%type <ast> wire_type range non_opt_range expr basic_expr concat_list rvalue lvalue lvalue_concat_list
%type <string> opt_label tok_prim_wrapper hierarchical_id
@ -336,6 +337,16 @@ non_opt_range:
$$->children.push_back($2);
$$->children.push_back($4);
} |
'[' expr TOK_POS_INDEXED expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back(new AstNode(AST_SUB, new AstNode(AST_ADD, $2->clone(), $4), AstNode::mkconst_int(1, true)));
$$->children.push_back(new AstNode(AST_ADD, $2, AstNode::mkconst_int(0, true)));
} |
'[' expr TOK_NEG_INDEXED expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back(new AstNode(AST_ADD, $2, AstNode::mkconst_int(0, true)));
$$->children.push_back(new AstNode(AST_SUB, new AstNode(AST_ADD, $2->clone(), AstNode::mkconst_int(1, true)), $4));
} |
'[' expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back($2);