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keep_hierarchy: Update messages

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This commit is contained in:
Martin Povišer 2024-11-05 09:00:46 +01:00
parent cf79630be0
commit c8fffce2b5
1 changed files with 11 additions and 5 deletions
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16
passes/hierarchy/keep_hierarchy.cc
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@ -63,7 +63,7 @@ struct ThresholdHiearchyKeeping {
} }
if (size > threshold) { if (size > threshold) {
log("Marking %s (module too big: %llu > %llu).\n", log_id(module), size, threshold); log("Keeping %s (estimated size above threshold: %llu > %llu).\n", log_id(module), size, threshold);
module->set_bool_attribute(ID::keep_hierarchy); module->set_bool_attribute(ID::keep_hierarchy);
size = 0; size = 0;
} }
@ -75,7 +75,7 @@ struct ThresholdHiearchyKeeping {
}; };
struct KeepHierarchyPass : public Pass { struct KeepHierarchyPass : public Pass {
KeepHierarchyPass() : Pass("keep_hierarchy", "add the keep_hierarchy attribute") {} KeepHierarchyPass() : Pass("keep_hierarchy", "selectively add the keep_hierarchy attribute") {}
void help() override void help() override
{ {
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
@ -85,9 +85,15 @@ struct KeepHierarchyPass : public Pass {
log("Add the keep_hierarchy attribute.\n"); log("Add the keep_hierarchy attribute.\n");
log("\n"); log("\n");
log(" -min_cost <min_cost>\n"); log(" -min_cost <min_cost>\n");
log(" only add the attribute to modules estimated to have more\n"); log(" only add the attribute to modules estimated to have more than <min_cost>\n");
log(" than <min_cost> gates after simple techmapping. Intended\n"); log(" gates after simple techmapping. Intended for tuning trade-offs between\n");
log(" for tuning trade-offs between quality and yosys runtime.\n"); log(" quality and yosys runtime.\n");
log("\n");
log(" When evaluating a module's cost, gates which are within a submodule\n");
log(" which is marked with the keep_hierarchy attribute are not counted\n");
log(" towards the upper module's cost. This applies to both when the attribute\n");
log(" was added by this command or was pre-existing.\n");
log("\n");
} }
void execute(std::vector<std::string> args, RTLIL::Design *design) override void execute(std::vector<std::string> args, RTLIL::Design *design) override
{ {