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Added help messages for opt_* passes

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This commit is contained in:
Clifford Wolf 2013-03-01 08:58:55 +01:00
parent 1bc0f04789
commit 36954471a6
7 changed files with 127 additions and 11 deletions
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17
passes/opt/opt_rmdff.cc
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@ -93,7 +93,17 @@ delete_dff:
}
struct OptRmdffPass : public Pass {
OptRmdffPass() : Pass("opt_rmdff") { }
OptRmdffPass() : Pass("opt_rmdff", "remove DFFs with constant inputs") { }
virtual void help()
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" opt_rmdff [selection]\n");
log("\n");
log("This pass identifies flip-flops with constant inputs and replaces them with\n");
log("a constant driver.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
int total_count = 0;
@ -103,10 +113,15 @@ struct OptRmdffPass : public Pass {
for (auto &mod_it : design->modules)
{
if (!design->selected(mod_it.second))
continue;
assign_map.set(mod_it.second);
std::vector<std::string> dff_list;
for (auto &it : mod_it.second->cells) {
if (!design->selected(mod_it.second, it.second))
continue;
if (it.second->type == "$_DFF_N_") dff_list.push_back(it.first);
if (it.second->type == "$_DFF_P_") dff_list.push_back(it.first);
if (it.second->type == "$_DFF_NN0_") dff_list.push_back(it.first);