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https://github.com/YosysHQ/yosys
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Improvements in "viz" command
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
This commit is contained in:
Claire Xenia Wolf
parent
c9f4b06cb2
commit
e151e44caa
1 changed files with 211 additions and 60 deletions
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@ -41,6 +41,7 @@ PRIVATE_NAMESPACE_BEGIN
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struct GraphNode {
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int index = -1;
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bool nomerge = false;
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bool terminal = false;
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GraphNode *replaced = nullptr;
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@ -132,51 +133,125 @@ struct Graph {
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if (n->replaced) {
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replaced_nodes.push_back(n);
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} else {
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new_nodes.push_back(n);
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n->index = GetSize(new_nodes);
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n->cleanup();
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if (n->terminal)
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term_nodes_cnt++;
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else
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nonterm_nodes_cnt++;
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n->cleanup();
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n->index = GetSize(new_nodes);
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new_nodes.push_back(n);
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}
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}
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std::swap(nodes, new_nodes);
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}
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bool merge_simple()
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enum merge_flags_t : uint32_t {
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merge_tag_any = 0x00000001,
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merge_tag_buf = 0x00000002,
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merge_dbl_buf = 0x00000004,
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merge_bi_conn = 0x00000008,
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merge_id_conn = 0x00000010,
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merge_term = 0x00000020,
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merge_small = 0x00000040,
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merge_stage_1 = merge_tag_buf | merge_dbl_buf | merge_bi_conn | merge_id_conn | merge_term,
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merge_stage_2 = merge_tag_any | merge_dbl_buf | merge_bi_conn | merge_id_conn,
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merge_stage_3 = merge_id_conn | merge_term | merge_small
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};
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bool merge(merge_flags_t flags)
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{
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dict<GraphNode*, pool<int>, hash_ptr_ops> node_tags;
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bool did_something = false;
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while (true) {
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while (true)
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{
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if (node_tags.empty() || (flags & merge_tag_buf) != 0) {
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std::function<void(GraphNode*,int,bool)> downprop_tag = [&](GraphNode *g, int tag, bool last) {
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auto &tags = node_tags[g];
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auto it = tags.find(tag);
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if (it != tags.end()) return;
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tags.insert(tag);
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if (last) return;
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for (auto n : g->downstream())
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downprop_tag(n->get(), tag, n->terminal);
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};
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std::function<void(GraphNode*,int,bool)> upprop_tag = [&](GraphNode *g, int tag, bool last) {
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auto &tags = node_tags[g];
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auto it = tags.find(tag);
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if (it != tags.end()) return;
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tags.insert(tag);
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if (last) return;
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for (auto n : g->upstream())
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upprop_tag(n->get(), tag, n->terminal);
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};
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int tag = 0;
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node_tags.clear();
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for (auto g : nodes) {
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if (g->replaced || !g->terminal) continue;
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downprop_tag(g, ++tag, false);
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upprop_tag(g, ++tag, false);
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}
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}
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vector<pair<GraphNode*,GraphNode*>> queued_merges;
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typedef pair<pool<GraphNode*, hash_ptr_ops>, pool<GraphNode*, hash_ptr_ops>> node_conn_t;
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dict<node_conn_t, pool<GraphNode*, hash_ptr_ops>> nodes_by_conn[2];
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for (auto g : nodes) {
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if (g->replaced) continue;
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if (g->replaced || g->nomerge) continue;
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if ((flags & merge_term) == 0 && g->terminal) continue;
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if ((flags & merge_id_conn) != 0)
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nodes_by_conn[g->terminal][node_conn_t(g->upstream(), g->downstream())].insert(g);
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if ((flags & merge_tag_any) != 0 || ((flags & merge_tag_buf) != 0 && GetSize(g->downstream()) == 1)) {
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for (auto n : g->downstream()) {
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if (g->terminal != n->terminal || n->nomerge) continue;
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if (node_tags[g] != node_tags[n->get()]) continue;
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queued_merges.push_back(pair<GraphNode*,GraphNode*>(g, n->get()));
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}
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}
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if ((flags & merge_dbl_buf) != 0) {
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if (GetSize(g->downstream()) == 1) {
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auto n = (*g->downstream().begin())->get();
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if (g->terminal != n->terminal) continue;
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if (g->terminal != n->terminal || n->nomerge) continue;
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if (GetSize(n->downstream()) != 1) continue;
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queued_merges.push_back(pair<GraphNode*,GraphNode*>(g, n));
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}
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if (GetSize(g->upstream()) == 1) {
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auto n = (*g->upstream().begin())->get();
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if (g->terminal != n->terminal) continue;
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queued_merges.push_back(pair<GraphNode*,GraphNode*>(g, n));
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}
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if ((flags & merge_bi_conn) != 0) {
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for (auto n : g->downstream()) {
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if (g->terminal != n->terminal) continue;
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if (g->terminal != n->terminal || n->nomerge) continue;
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if (!n->downstream().count(g)) continue;
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queued_merges.push_back(pair<GraphNode*,GraphNode*>(g, n));
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}
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}
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if ((flags & merge_small) != 0 && !g->terminal && GetSize(g->names()) < 10) {
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GraphNode *best = nullptr;
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for (auto n : g->downstream()) {
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if (n->terminal || n->nomerge || GetSize(n->names()) > 10-GetSize(g->names())) continue;
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if (best && GetSize(best->names()) <= GetSize(n->names())) continue;
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best = n;
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}
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for (auto n : g->upstream()) {
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if (n->terminal || n->nomerge || GetSize(n->names()) > 10-GetSize(g->names())) continue;
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if (best && GetSize(best->names()) <= GetSize(n->names())) continue;
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best = n;
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}
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if (best) queued_merges.push_back(pair<GraphNode*,GraphNode*>(g, best));
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}
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}
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if ((flags & merge_id_conn) != 0) {
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for (int term = 0; term < 2; term++) {
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for (auto &grp : nodes_by_conn[term]) {
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auto it = grp.second.begin();
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@ -185,6 +260,7 @@ struct Graph {
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queued_merges.push_back(pair<GraphNode*,GraphNode*>(first, *it));
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}
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}
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}
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int count_merges = 0;
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for (auto m : queued_merges) {
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@ -195,13 +271,13 @@ struct Graph {
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}
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if (count_merges == 0) return did_something;
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log(" Replaced %d nodes in merge_simple().\n", count_merges);
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log(" Merged %d node pairs.\n", count_merges);
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did_something = true;
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cleanup();
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}
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}
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Graph(Module *module)
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Graph(Module *module, const std::vector<RTLIL::Selection> &groups)
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{
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SigMap sigmap(module);
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dict<SigBit, GraphNode*> wire_nodes;
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@ -224,6 +300,31 @@ struct Graph {
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}
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}
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for (auto grp : groups)
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{
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GraphNode *g = nullptr;
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if (!grp.selected_module(module->name))
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continue;
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for (auto wire : module->wires()) {
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if (!wire->name.isPublic()) continue;
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if (!grp.selected_member(module->name, wire->name)) continue;
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for (auto bit : sigmap(wire)) {
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if (!wire_nodes.count(bit))
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continue;
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auto n = wire_nodes.at(bit)->get();
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if (g)
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g->replace(n);
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else
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g = n;
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}
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}
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if (g)
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g->nomerge = true;
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}
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dict<Cell*, GraphNode*> cell_nodes;
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dict<SigBit, pool<GraphNode*, hash_ptr_ops>> sig_users;
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@ -280,42 +381,80 @@ struct VizWorker
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FILE *f;
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Graph graph;
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VizWorker(FILE *f, Module *module) : graph(module)
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VizWorker(FILE *f, Module *module, const std::vector<RTLIL::Selection> &groups) : graph(module, groups)
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{
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log("Running Viz for module %s:\n", log_id(module));
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log(" Initial number of terminal nodes is %d.\n", graph.term_nodes_cnt);
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log(" Initial number of non-terminal nodes is %d.\n", graph.nonterm_nodes_cnt);
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graph.merge_simple();
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log(" Stage-1 merge loop:\n");
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graph.merge(Graph::merge_stage_1);
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log(" New number of terminal nodes is %d.\n", graph.term_nodes_cnt);
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log(" New number of non-terminal nodes is %d.\n", graph.nonterm_nodes_cnt);
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log(" Stage-2 merge loop:\n");
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graph.merge(Graph::merge_stage_2);
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log(" New number of terminal nodes is %d.\n", graph.term_nodes_cnt);
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log(" New number of non-terminal nodes is %d.\n", graph.nonterm_nodes_cnt);
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log(" Stage-3 merge loop:\n");
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graph.merge(Graph::merge_stage_3);
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log(" Final number of terminal nodes is %d.\n", graph.term_nodes_cnt);
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log(" Final number of non-terminal nodes is %d.\n", graph.nonterm_nodes_cnt);
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fprintf(f, "digraph \"%s\" {", log_id(module));
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fprintf(f, " rankdir = LR;");
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for (int i = 0; i < GetSize(graph.nodes); i++) {
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auto g = graph.nodes[i];
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if (g->terminal) {
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std::string label;
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for (auto n : g->names()) {
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if (!label.empty())
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label += "\\n";
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label += log_id(n);
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}
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fprintf(f, "\tn%d [shape=octagon,label=\"%s\"];\n", g->index, label.c_str());
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} else {
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fprintf(f, "\tn%d [label=\"%d cells\"];\n", g->index, GetSize(g->names()));
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}
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dict<GraphNode*, std::vector<std::string>, hash_ptr_ops> extra_lines;
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dict<GraphNode*, GraphNode*, hash_ptr_ops> bypass_nodes;
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for (auto g : graph.nodes) {
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if (!g->terminal) continue;
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if (GetSize(g->upstream()) != 1) continue;
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if (!g->downstream().empty() && g->downstream() != g->upstream()) continue;
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auto n = *(g->upstream().begin());
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for (auto name : g->names())
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extra_lines[n].push_back(log_id(name));
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bypass_nodes[g] = n;
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}
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for (int i = 0; i < GetSize(graph.nodes); i++) {
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auto g = graph.nodes[i];
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if (g->downstream().empty() && g->upstream().empty())
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continue;
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if (bypass_nodes.count(g))
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continue;
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if (g->terminal) {
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std::string label; // = stringf("[%d]\\n", g->index);
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for (auto n : g->names())
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label = label + (label.empty() ? "" : "\\n") + log_id(n);
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fprintf(f, "\tn%d [shape=rectangle,label=\"%s\"];\n", g->index, label.c_str());
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} else {
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std::string label = stringf("grp%d | %d cells", g->index, GetSize(g->names()));
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std::string shape = "oval";
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if (extra_lines.count(g)) {
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label += label.empty() ? "" : "\\n";
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for (auto line : extra_lines.at(g))
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label = label + (label.empty() ? "" : "\\n") + line;
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shape = "octagon";
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}
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fprintf(f, "\tn%d [shape=%s,label=\"%s\"];\n", g->index, shape.c_str(), label.c_str());
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}
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}
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pool<std::string> edges;
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for (int i = 0; i < GetSize(graph.nodes); i++) {
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auto g = graph.nodes[i];
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g = bypass_nodes.at(g, g);
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for (auto n : g->downstream()) {
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n = bypass_nodes.at(n, n);
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if (g == n) continue;
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if (g->terminal && !n->terminal && n->downstream().count(g)) continue;
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fprintf(f, "\tn%d -> n%d;\n", g->index, n->index);
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edges.insert(stringf("n%d -> n%d", g->index, n->index));
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}
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}
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for (auto e : edges)
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fprintf(f, "\t%s;\n", e.c_str());
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fprintf(f, "}");
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}
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@ -343,7 +482,7 @@ struct VizPass : public Pass {
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log(" to generate files in other formats (this calls the 'dot' command).\n");
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log("\n");
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log(" -prefix <prefix>\n");
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log(" generate <prefix>.* instead of ~/.yosys_show.*\n");
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log(" generate <prefix>.* instead of ~/.yosys_viz.*\n");
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log("\n");
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log(" -pause\n");
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log(" wait for the user to press enter to before returning\n");
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@ -352,10 +491,14 @@ struct VizPass : public Pass {
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log(" don't run viewer in the background, IE wait for the viewer tool to\n");
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log(" exit before returning\n");
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log("\n");
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log(" -g <selection>\n");
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log(" manually define a group of terminal signals. this group is not being\n");
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log(" merged with other terminal groups.\n");
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log("\n");
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log("When no <format> is specified, 'dot' is used. When no <format> and <viewer> is\n");
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log("specified, 'xdot' is used to display the schematic (POSIX systems only).\n");
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log("\n");
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log("The generated output files are '~/.yosys_show.dot' and '~/.yosys_show.<format>',\n");
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log("The generated output files are '~/.yosys_viz.dot' and '~/.yosys_viz.<format>',\n");
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log("unless another prefix is specified using -prefix <prefix>.\n");
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log("\n");
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log("Yosys on Windows and YosysJS use different defaults: The output is written\n");
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@ -373,13 +516,14 @@ struct VizPass : public Pass {
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std::string prefix = "show";
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#else
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std::string format;
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std::string prefix = stringf("%s/.yosys_show", getenv("HOME") ? getenv("HOME") : ".");
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std::string prefix = stringf("%s/.yosys_viz", getenv("HOME") ? getenv("HOME") : ".");
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#endif
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std::string viewer_exe;
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bool flag_pause = false;
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bool custom_prefix = false;
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std::string background = "&";
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RTLIL::IdString colorattr;
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std::vector<RTLIL::Selection> groups;
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++)
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@ -406,6 +550,13 @@ struct VizPass : public Pass {
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background= "";
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continue;
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}
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if (arg == "-g" && argidx+1 < args.size()) {
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handle_extra_select_args(this, args, argidx+1, argidx+2, design);
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groups.push_back(design->selection_stack.back());
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design->selection_stack.pop_back();
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++argidx;
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continue;
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}
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break;
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}
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extra_args(args, argidx, design);
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@ -438,7 +589,7 @@ struct VizPass : public Pass {
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continue;
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if (module->cells().size() == 0 && module->connections().empty())
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continue;
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VizWorker worker(f, module);
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VizWorker worker(f, module, groups);
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}
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fclose(f);
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