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authorClifford Wolf <clifford@clifford.at>2014-12-14 17:37:46 +0100
committerClifford Wolf <clifford@clifford.at>2014-12-14 17:37:46 +0100
commit32dce4a870e8f556897096a0c252b2e43f5622e5 (patch)
treebfb826b81909f6e91b4e44c85326ac334569a2be /backends/blif
parentf7cf60b45c04bcefd60cca3f56b648ddadd242ac (diff)
Added "blif -unbuf" feature
Diffstat (limited to 'backends/blif')
-rw-r--r--backends/blif/blif.cc19
1 files changed, 19 insertions, 0 deletions
diff --git a/backends/blif/blif.cc b/backends/blif/blif.cc
index 216e59fb..18f76f7e 100644
--- a/backends/blif/blif.cc
+++ b/backends/blif/blif.cc
@@ -40,6 +40,7 @@ struct BlifDumperConfig
bool param_mode;
std::string buf_type, buf_in, buf_out;
+ std::map<RTLIL::IdString, std::pair<RTLIL::IdString, RTLIL::IdString>> unbuf_types;
std::string true_type, true_out, false_type, false_out;
BlifDumperConfig() : icells_mode(false), conn_mode(false), impltf_mode(false), gates_mode(false), param_mode(false) { }
@@ -146,6 +147,13 @@ struct BlifDumper
{
RTLIL::Cell *cell = cell_it.second;
+ if (config->unbuf_types.count(cell->type)) {
+ auto portnames = config->unbuf_types.at(cell->type);
+ f << stringf(".names %s %s\n1 1\n",
+ cstr(cell->getPort(portnames.first)), cstr(cell->getPort(portnames.second)));
+ continue;
+ }
+
if (!config->icells_mode && cell->type == "$_NOT_") {
f << stringf(".names %s %s\n0 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\Y")));
@@ -279,6 +287,10 @@ struct BlifBackend : public Backend {
log(" -buf <cell-type> <in-port> <out-port>\n");
log(" use cells of type <cell-type> with the specified port names for buffers\n");
log("\n");
+ log(" -unbuf <cell-type> <in-port> <out-port>\n");
+ log(" replace buffer cells with the specified name and port names with\n");
+ log(" a .names statement that models a buffer\n");
+ log("\n");
log(" -true <cell-type> <out-port>\n");
log(" -false <cell-type> <out-port>\n");
log(" use the specified cell types to drive nets that are constant 1 or 0\n");
@@ -329,6 +341,13 @@ struct BlifBackend : public Backend {
config.buf_out = args[++argidx];
continue;
}
+ if (args[argidx] == "-unbuf" && argidx+3 < args.size()) {
+ RTLIL::IdString unbuf_type = RTLIL::escape_id(args[++argidx]);
+ RTLIL::IdString unbuf_in = RTLIL::escape_id(args[++argidx]);
+ RTLIL::IdString unbuf_out = RTLIL::escape_id(args[++argidx]);
+ config.unbuf_types[unbuf_type] = std::pair<RTLIL::IdString, RTLIL::IdString>(unbuf_in, unbuf_out);
+ continue;
+ }
if (args[argidx] == "-true" && argidx+2 < args.size()) {
config.true_type = args[++argidx];
config.true_out = args[++argidx];