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Add RTLIL "buffered-normalized mode" and improve "bufnorm" pass

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Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
This commit is contained in:
Claire Xenia Wolf 2023-09-29 15:49:15 +02:00 • committed by Martin Povišer
parent 8bb70bac8d
commit 80119386c0
5 changed files with 238 additions and 13 deletions
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76
passes/techmap/bufnorm.cc
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@ -83,11 +83,21 @@ struct BufnormPass : public Pass {
log(" -conn\n");
log(" Create 'direct connections' instead of buffer cells.\n");
log("\n");
log(" -nomode\n");
log(" Do not automatically enter or leave 'buffered-normalized mode'.\n");
log("\n");
log("The 'bufnorm' command can also be used to just switch in and out of\n");
log("'buffered-normalized mode' and run the low-level re-normalizer.\n");
log("\n");
log(" -update\n");
log(" Enter 'buffered-normalized mode' and (re-)normalize.\n");
log("\n");
log(" -reset\n");
log(" Leave 'buffered-normalized mode' without changing the netlist.\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
log_header(design, "Executing BUFNORM pass (convert to buffer-normalized form).\n");
bool buf_mode = false;
bool chain_mode = false;
bool output_mode = false;
@ -97,66 +107,97 @@ struct BufnormPass : public Pass {
bool nosticky_mode = false;
bool alphasort_mode = false;
bool noinit_mode = false; // FIXME: Actually move init attributes
bool nomode_mode = false;
bool pos_mode = false;
bool bits_mode = false;
bool conn_mode = false;
bool update_mode = false;
bool reset_mode = false;
bool got_non_update_reset_opt = false;
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
std::string arg = args[argidx];
if (arg == "-buf") {
buf_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-chain") {
chain_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-output") {
output_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-public") {
public_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-nochain") {
nochain_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-nokeep") {
nokeep_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-flat") {
nochain_mode = true;
nokeep_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-nosticky") {
nosticky_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-alphasort") {
alphasort_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-noinit") {
noinit_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-pos") {
pos_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-bits") {
bits_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-conn") {
conn_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-nomode") {
nomode_mode = true;
got_non_update_reset_opt = true;
continue;
}
if (arg == "-update") {
update_mode = true;
continue;
}
if (arg == "-reset") {
reset_mode = true;
continue;
}
break;
@ -172,12 +213,38 @@ struct BufnormPass : public Pass {
if (pos_mode && conn_mode)
log_cmd_error("Options -pos and -conn are exclusive.\n");
if (update_mode && reset_mode)
log_cmd_error("Options -update and -reset are exclusive.\n");
if (update_mode && got_non_update_reset_opt)
log_cmd_error("Option -update can't be mixed with other options.\n");
if (reset_mode && got_non_update_reset_opt)
log_cmd_error("Option -reset can't be mixed with other options.\n");
if (update_mode) {
design->bufNormalize();
return;
}
if (reset_mode) {
design->bufNormalize(false);
return;
}
log_header(design, "Executing BUFNORM pass (convert to buffer-normalized form).\n");
int count_removed_buffers = 0;
int count_updated_buffers = 0;
int count_kept_buffers = 0;
int count_created_buffers = 0;
int count_updated_cellports = 0;
if (!nomode_mode && (pos_mode || bits_mode || conn_mode)) {
if (design->selection().full_selection)
design->bufNormalize(false);
}
for (auto module : design->selected_modules())
{
log("Buffer-normalizing module %s.\n", log_id(module));
@ -432,6 +499,11 @@ struct BufnormPass : public Pass {
log("Summary: removed %d, updated %d, kept %d, and created %d buffers, and updated %d cell ports.\n",
count_removed_buffers, count_updated_buffers, count_kept_buffers,
count_created_buffers, count_updated_cellports);
if (!nomode_mode && !(pos_mode || bits_mode || conn_mode)) {
if (design->selection().full_selection)
design->bufNormalize(true);
}
}
} BufnormPass;