systemverilog-plugin: fix wires not starting from 0
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
diff --git a/systemverilog-plugin/UhdmAst.cc b/systemverilog-plugin/UhdmAst.cc
index 38c42a7..471816b 100644
--- a/systemverilog-plugin/UhdmAst.cc
+++ b/systemverilog-plugin/UhdmAst.cc
@@ -458,6 +458,16 @@
});
}
+static void warn_start_range(const std::vector<AST::AstNode *> ranges)
+{
+ for (size_t i = 0; i < ranges.size(); i++) {
+ auto start_elem = min(ranges[i]->children[0]->integer, ranges[i]->children[1]->integer);
+ if (start_elem != 0) {
+ log_file_warning(ranges[i]->filename, ranges[i]->location.first_line, "Limited support for multirange wires that don't start from 0\n");
+ }
+ }
+}
+
// This function is workaround missing support for multirange (with n-ranges) packed/unpacked nodes
// It converts multirange node to single-range node and translates access to this node
// to correct range
@@ -476,9 +486,6 @@
wire_node->range_valid = true;
return;
}
- size_t size = 1;
- size_t packed_size = 1;
- size_t unpacked_size = 1;
std::vector<AST::AstNode *> ranges;
// Convert only when node is not a memory and at least 1 of the ranges has more than 1 range
@@ -502,11 +509,23 @@
return false;
}();
if (convert_node) {
+ // if not already converted
if (wire_node->multirange_dimensions.empty()) {
- packed_size = add_multirange_attribute(wire_node, packed_ranges);
- unpacked_size = add_multirange_attribute(wire_node, unpacked_ranges);
- size = packed_size * unpacked_size;
- ranges.push_back(make_range(size - 1, 0));
+ const size_t packed_size = add_multirange_attribute(wire_node, packed_ranges);
+ const size_t unpacked_size = add_multirange_attribute(wire_node, unpacked_ranges);
+ if (packed_ranges.size() == 1 && unpacked_ranges.empty()) {
+ ranges.push_back(packed_ranges[0]->clone());
+ } else if (unpacked_ranges.size() == 1 && packed_ranges.empty()) {
+ ranges.push_back(unpacked_ranges[0]->clone());
+ } else {
+ // currently we have limited support
+ // for multirange wires that doesn't start from 0
+ warn_start_range(packed_ranges);
+ warn_start_range(unpacked_ranges);
+ const size_t size = packed_size * unpacked_size;
+ log_assert(size >= 1);
+ ranges.push_back(make_range(size - 1, 0));
+ }
}
} else {
for (auto r : packed_ranges) {
