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Added support for hierarchical defparams

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This commit is contained in:
Clifford Wolf 2016-11-15 13:35:19 +01:00
parent a926a6afc2
commit 70d7a02cae
5 changed files with 65 additions and 17 deletions
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43
frontends/ast/simplify.cc
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@ -685,19 +685,40 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
current_scope.clear();
// convert defparam nodes to cell parameters
if (type == AST_DEFPARAM && !str.empty()) {
size_t pos = str.rfind('.');
if (type == AST_DEFPARAM && !children.empty())
{
if (children[0]->type != AST_IDENTIFIER)
log_error("Module name in defparam at %s:%d contains non-constant expressions!\n", filename.c_str(), linenum);
string modname, paramname = children[0]->str;
size_t pos = paramname.rfind('.');
while (pos != 0 && pos != std::string::npos)
{
modname = paramname.substr(0, pos);
if (current_scope.count(modname))
break;
pos = paramname.rfind('.', pos - 1);
}
if (pos == std::string::npos)
log_error("Defparam `%s' does not contain a dot (module/parameter separator) at %s:%d!\n",
RTLIL::unescape_id(str).c_str(), filename.c_str(), linenum);
std::string modname = str.substr(0, pos), paraname = "\\" + str.substr(pos+1);
if (current_scope.count(modname) == 0 || current_scope.at(modname)->type != AST_CELL)
log_error("Can't find cell for defparam `%s . %s` at %s:%d!\n", RTLIL::unescape_id(modname).c_str(), RTLIL::unescape_id(paraname).c_str(), filename.c_str(), linenum);
AstNode *cell = current_scope.at(modname), *paraset = clone();
log_error("Can't find object for defparam `%s` at %s:%d!\n", RTLIL::unescape_id(paramname).c_str(), filename.c_str(), linenum);
paramname = "\\" + paramname.substr(pos+1);
if (current_scope.at(modname)->type != AST_CELL)
log_error("Defparam argument `%s . %s` does not match a cell at %s:%d!\n",
RTLIL::unescape_id(modname).c_str(), RTLIL::unescape_id(paramname).c_str(), filename.c_str(), linenum);
AstNode *paraset = new AstNode(AST_PARASET, children[1]->clone(), GetSize(children) > 2 ? children[2]->clone() : NULL);
paraset->str = paramname;
AstNode *cell = current_scope.at(modname);
cell->children.insert(cell->children.begin() + 1, paraset);
paraset->type = AST_PARASET;
paraset->str = paraname;
str.clear();
delete_children();
}
// resolve constant prefixes