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authorClifford Wolf <clifford@clifford.at>2013-07-04 14:12:33 +0200
committerClifford Wolf <clifford@clifford.at>2013-07-04 14:12:33 +0200
commit56432a920f9c2189ead2f724f18cde20aad7bf99 (patch)
tree37c83554247ef98dfba58409993b8f1d2379aa09 /frontends/ast/simplify.cc
parent3b294b391202bdac25c822cc06d7572249b38949 (diff)
Added defparam support to Verilog/AST frontend
Diffstat (limited to 'frontends/ast/simplify.cc')
-rw-r--r--frontends/ast/simplify.cc20
1 files changed, 18 insertions, 2 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index bc135b39..cf21c85d 100644
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -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 || type == AST_PREFIX)
+ if (type == AST_WIRE || type == AST_PARAMETER || type == AST_LOCALPARAM || type == AST_DEFPARAM || 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;
@@ -163,7 +163,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage)
}
wires_are_incompatible:
if (node->type == AST_PARAMETER || node->type == AST_LOCALPARAM || node->type == AST_WIRE || node->type == AST_AUTOWIRE || node->type == AST_GENVAR ||
- node->type == AST_MEMORY || node->type == AST_FUNCTION || node->type == AST_TASK) {
+ node->type == AST_MEMORY || node->type == AST_FUNCTION || node->type == AST_TASK || node->type == AST_CELL) {
backup_scope[node->str] = current_scope[node->str];
current_scope[node->str] = node;
}
@@ -224,6 +224,22 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage)
if (type == AST_MODULE)
current_scope.clear();
+ // convert defparam nodes to cell parameters
+ if (type == AST_DEFPARAM && !str.empty()) {
+ size_t pos = str.rfind('.');
+ if (pos == std::string::npos)
+ log_error("Defparam `%s' does not contain a dot (module/parameter seperator) at %s:%d!\n",
+ RTLIL::id2cstr(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::id2cstr(modname), RTLIL::id2cstr(paraname), filename.c_str(), linenum);
+ AstNode *cell = current_scope.at(modname), *paraset = clone();
+ cell->children.insert(cell->children.begin() + 1, paraset);
+ paraset->type = AST_PARASET;
+ paraset->str = paraname;
+ str.clear();
+ }
+
// resolve constant prefixes
if (type == AST_PREFIX) {
if (children[0]->type != AST_CONSTANT) {