Encode large (>32 bits) parameters as hex string in edif backend

1 files changed, 16 insertions, 3 deletions

diff --git a/backends/edif/edif.cc b/backends/edif/edif.cc
index 8bf2bbc2..944e576a 100644
--- a/backends/edif/edif.cc
+++ b/backends/edif/edif.cc
@@ -216,10 +216,23 @@ struct EdifBackend : public Backend {
 				fprintf(f, "            (viewRef VIEW_NETLIST (cellRef %s%s))", EDIF_NAME(cell->type),
 						lib_cell_ports.count(cell->type) > 0 ? " (libraryRef LIB)" : "");
 				for (auto &p : cell->parameters)
-					if (p.second.bits.size() <= 32 && RTLIL::SigSpec(p.second).is_fully_def())
+					if (!p.second.str.empty())
+						fprintf(f, "\n            (property %s (string \"%s\"))", EDIF_NAME(p.first), p.second.str.c_str());
+					else if (p.second.bits.size() <= 32 && RTLIL::SigSpec(p.second).is_fully_def())
 						fprintf(f, "\n            (property %s (integer %u))", EDIF_NAME(p.first), p.second.as_int());
-					else
-						fprintf(f, "\n            (property %s FIXME)", EDIF_NAME(p.first));
+					else {
+						std::string hex_string = "";
+						for (size_t i = 0; i < p.second.bits.size(); i += 4) {
+							int digit_value = 0;
+							if (i+0 < p.second.bits.size() && p.second.bits.at(i+0) == RTLIL::State::S1) digit_value += 1;
+							if (i+1 < p.second.bits.size() && p.second.bits.at(i+1) == RTLIL::State::S1) digit_value += 2;
+							if (i+2 < p.second.bits.size() && p.second.bits.at(i+2) == RTLIL::State::S1) digit_value += 3;
+							if (i+3 < p.second.bits.size() && p.second.bits.at(i+3) == RTLIL::State::S1) digit_value += 4;
+							char digit_str[2] = { "0123456789abcdef"[digit_value], 0 };
+							hex_string = std::string(digit_str) + hex_string;
+						}
+						fprintf(f, "\n            (property %s (string \"%s\"))", EDIF_NAME(p.first), hex_string.c_str());
+					}
 				fprintf(f, ")\n");
 				for (auto &p : cell->connections) {
 					RTLIL::SigSpec sig = sigmap(p.second);