mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-06-20 04:43:40 +00:00
Code Activity

Help and comments

Browse source
This commit is contained in:
Alain Dargelas 2024-11-25 20:04:13 -08:00
parent cd15e211b7
commit c0c0d9c559
1 changed files with 19 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

24
passes/cmds/longloop_select.cc
View file

@ -27,9 +27,18 @@ PRIVATE_NAMESPACE_BEGIN
struct LongLoopSelect : public ScriptPass { struct LongLoopSelect : public ScriptPass {
LongLoopSelect() LongLoopSelect()
: ScriptPass("longloop_select", "Selects long for-loops (Creating logic above a certain logic depth) for further optimization") : ScriptPass("longloop_select", "Selects long for-loops (Creating logic above a certain logic depth) for further optimizations")
{ {
} }
void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" longloop_select [-depth <for-loop threshold depth>] [-abc <ABC script>]\n");
log(" If no ABC script is provided, this pass simply selects cells in for-loops\n");
log(" If an ABC script is provided, this pass selects cells in a per for-loop basis and runs ABC with the given script\n");
log("\n");
}
void script() override {} void script() override {}
// Adapted from the torder pass // Adapted from the torder pass
@ -148,13 +157,14 @@ struct LongLoopSelect : public ScriptPass {
std::string loopInd = itrCluster->first; std::string loopInd = itrCluster->first;
if (itrCluster->second.size() < threshold_depth) { if (itrCluster->second.size() < threshold_depth) {
if (debug) { if (debug) {
log(" Skipping loop id %s as it contains only %ld cells\n", loopInd.c_str(), itrCluster->second.size()); log(" Skipping loop location %s as it contains only %ld cells\n", loopInd.c_str(),
itrCluster->second.size());
log_flush(); log_flush();
} }
continue; continue;
} }
if (debug) { if (debug) {
log(" Analyzing loop id %s containing %ld cells\n", loopInd.c_str(), itrCluster->second.size()); log(" Analyzing loop location %s containing %ld cells\n", loopInd.c_str(), itrCluster->second.size());
log_flush(); log_flush();
} }
// For a given for-loop cell group, perform topological sorting to get the logic depth of the ending cell in // For a given for-loop cell group, perform topological sorting to get the logic depth of the ending cell in
@ -168,8 +178,8 @@ struct LongLoopSelect : public ScriptPass {
log_flush(); log_flush();
} }
if (logicdepth > (int)threshold_depth) { if (logicdepth > (int)threshold_depth) {
log(" Selecting %ld cells in for-loop id %s of depth %d ending with cell %s\n", itrCluster->second.size(), log(" Selecting %ld cells in for-loop location %s of depth %d ending with cell %s\n",
loopInd.c_str(), logicdepth, log_id((*itrLastCell))); itrCluster->second.size(), loopInd.c_str(), logicdepth, log_id((*itrLastCell)));
log_flush(); log_flush();
std::string src_info = (*itrLastCell)->get_src_attribute(); std::string src_info = (*itrLastCell)->get_src_attribute();
if (!(*itrLastCell)->get_string_attribute("\\in_for_loop").empty()) { if (!(*itrLastCell)->get_string_attribute("\\in_for_loop").empty()) {
@ -177,6 +187,7 @@ struct LongLoopSelect : public ScriptPass {
} }
// Select all cells in the loop cluster // Select all cells in the loop cluster
if (!abc_script.empty()) { if (!abc_script.empty()) {
// If an ABC script is provided, select on a per-loop basis
Pass::call(design, "select -none"); Pass::call(design, "select -none");
} }
for (auto cell : itrCluster->second) { for (auto cell : itrCluster->second) {
@ -195,13 +206,12 @@ struct LongLoopSelect : public ScriptPass {
log_flush(); log_flush();
Pass::call(design, command); Pass::call(design, command);
} else { } else {
std::string command = "abc -map_src " + src_info+ src_info + " -script " + abc_script; std::string command = "abc -map_src " + src_info + src_info + " -script " + abc_script;
log(" Executing: %s\n", command.c_str()); log(" Executing: %s\n", command.c_str());
log_flush(); log_flush();
Pass::call(design, command); Pass::call(design, command);
} }
} }
} }
} }
} }