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Added support for verilog genblock[index].member syntax

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This commit is contained in:
Clifford Wolf 2013-02-26 13:18:22 +01:00
parent 26a192b8c7
commit 4f0c2862a0
4 changed files with 34 additions and 12 deletions
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1
frontends/ast/ast.cc
View file

@ -77,6 +77,7 @@ std::string AST::type2str(AstNodeType type)
X(AST_CONSTANT)
X(AST_CELLTYPE)
X(AST_IDENTIFIER)
X(AST_PREFIX)
X(AST_FCALL)
X(AST_TO_SIGNED)
X(AST_TO_UNSIGNED)

1
frontends/ast/ast.h
View file

@ -56,6 +56,7 @@ namespace AST
AST_CONSTANT,
AST_CELLTYPE,
AST_IDENTIFIER,
AST_PREFIX,
AST_FCALL,
AST_TO_SIGNED,

16
frontends/ast/simplify.cc
View file

@ -103,7 +103,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage)
}
// activate const folding if this is anything that must be evaluated statically (ranges, parameters, attributes, etc.)
if (type == AST_WIRE || type == AST_PARAMETER || type == AST_LOCALPARAM || type == AST_PARASET || type == AST_RANGE)
if (type == AST_WIRE || type == AST_PARAMETER || type == AST_LOCALPARAM || type == AST_PARASET || type == AST_RANGE || type == AST_PREFIX)
const_fold = true;
if (type == AST_IDENTIFIER && current_scope.count(str) > 0 && (current_scope[str]->type == AST_PARAMETER || current_scope[str]->type == AST_LOCALPARAM))
const_fold = true;
@ -179,6 +179,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage)
break;
if (type == AST_GENIF && i >= 1)
break;
if (type == AST_PREFIX && i >= 1)
break;
while (did_something_here && i < children.size()) {
bool const_fold_here = const_fold, in_lvalue_here = in_lvalue;
if (i == 0 && type == AST_REPLICATE)
@ -217,6 +219,18 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage)
if (type == AST_MODULE)
current_scope.clear();
// resolve constant prefixes
if (type == AST_PREFIX) {
if (children[0]->type != AST_CONSTANT) {
dumpAst(NULL, "> ", NULL);
log_error("Index in generate block prefix syntax at %s:%d is not constant!\n", filename.c_str(), linenum);
}
assert(children[1]->type == AST_IDENTIFIER);
newNode = children[1]->clone();
newNode->str = stringf("%s[%d].%s", str.c_str(), children[0]->integer, children[1]->str.c_str());
goto apply_newNode;
}
// annotate constant ranges
if (type == AST_RANGE) {
bool old_range_valid = range_valid;

28
frontends/verilog/parser.y
View file

@ -105,7 +105,7 @@ 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
%type <ast> wire_type range expr basic_expr concat_list lvalue lvalue_concat_list
%type <ast> wire_type range expr basic_expr concat_list rvalue lvalue lvalue_concat_list
%type <string> opt_label tok_prim_wrapper
%type <boolean> opt_signed
%type <al> attr
@ -802,14 +802,22 @@ case_expr_list:
ast_stack.back()->children.push_back($3);
};
lvalue:
TOK_ID range {
$$ = new AstNode(AST_IDENTIFIER);
rvalue:
TOK_ID '[' expr ']' '.' rvalue {
$$ = new AstNode(AST_PREFIX, $3, $6);
$$->str = *$1;
if ($2)
$$->children.push_back($2);
delete $1;
} |
TOK_ID range {
$$ = new AstNode(AST_IDENTIFIER, $2);
$$->str = *$1;
delete $1;
};
lvalue:
rvalue {
$$ = $1;
} |
'{' lvalue_concat_list '}' {
$$ = $2;
};
@ -894,6 +902,9 @@ expr:
};
basic_expr:
rvalue {
$$ = $1;
} |
TOK_CONST {
$$ = const2ast(*$1, case_type_stack.size() == 0 ? 0 : case_type_stack.back());
delete $1;
@ -913,11 +924,6 @@ basic_expr:
$$->str = str;
delete $1;
} |
TOK_ID range {
$$ = new AstNode(AST_IDENTIFIER, $2);
$$->str = *$1;
delete $1;
} |
TOK_ID attr {
AstNode *node = new AstNode(AST_FCALL);
node->str = *$1;