From 6329bea8732a777e7e9d1df878e4b96c08517c69 Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sun, 20 Sep 2015 22:36:35 +0200
Subject: [PATCH] Added "qwp -dump"
---
passes/cmds/qwp.cc | 136 ++++++++++++++++++++++++++++++++++++++-------
1 file changed, 115 insertions(+), 21 deletions(-)
diff --git a/passes/cmds/qwp.cc b/passes/cmds/qwp.cc
index 86a7a5556..e76deaef4 100644
--- a/passes/cmds/qwp.cc
+++ b/passes/cmds/qwp.cc
@@ -42,6 +42,8 @@ struct QwpConfig
bool alpha;
double grid;
+ std::ofstream dump_file;
+
QwpConfig() {
ltr = false;
alpha = false;
@@ -51,7 +53,7 @@ struct QwpConfig
struct QwpWorker
{
- const QwpConfig &config;
+ QwpConfig &config;
Module *module;
char direction;
@@ -101,7 +103,13 @@ struct QwpWorker
dict<pair<int, int>, double> edges;
dict<Cell*, int> cell_to_node;
- QwpWorker(const QwpConfig &config, Module *module, char direction = 'x') : config(config), module(module), direction(direction)
+ // worker state variables
+ double midpos;
+ double radius;
+ double alt_midpos;
+ double alt_radius;
+
+ QwpWorker(QwpConfig &config, Module *module, char direction = 'x') : config(config), module(module), direction(direction)
{
log_assert(direction == 'x' || direction == 'y');
}
@@ -344,7 +352,60 @@ struct QwpWorker
}
}
- void run_worker(int indent, double midpos, double radius, double alt_midpos, double alt_radius)
+ void dump_svg(const pool<int> *green_nodes = nullptr)
+ {
+ config.dump_file << stringf("<svg height=\"200\" width=\"200\">\n");
+ config.dump_file << stringf("<rect width=\"200\" height=\"200\" style=\"fill:rgb(200,200,200);\" />\n");
+
+ double x_center = direction == 'x' ? midpos : alt_midpos;
+ double y_center = direction == 'y' ? midpos : alt_midpos;
+
+ double x_radius = direction == 'x' ? radius : alt_radius;
+ double y_radius = direction == 'y' ? radius : alt_radius;
+
+ for (auto &edge : edges)
+ {
+ auto &node1 = nodes[edge.first.first];
+ auto &node2 = nodes[edge.first.second];
+
+ double x1 = direction == 'x' ? node1.pos : node1.alt_pos;
+ double y1 = direction == 'y' ? node1.pos : node1.alt_pos;
+
+ double x2 = direction == 'x' ? node2.pos : node2.alt_pos;
+ double y2 = direction == 'y' ? node2.pos : node2.alt_pos;
+
+ x1 = 100 + 100 * (x1 - x_center) / x_radius;
+ y1 = 100 + 100 * (y1 - y_center) / y_radius;
+
+ x2 = 100 + 100 * (x2 - x_center) / x_radius;
+ y2 = 100 + 100 * (y2 - y_center) / y_radius;
+
+ config.dump_file << stringf("<line x1=\"%.2f\" y1=\"%.2f\" x2=\"%.2f\" y2=\"%.2f\" "
+ "style=\"stroke:rgb(0,0,0);stroke-width:1\" />\n", x1, y1, x2, y2);
+ }
+
+ for (int i = 0; i < GetSize(nodes); i++)
+ {
+ auto &node = nodes[i];
+
+ double x = direction == 'x' ? node.pos : node.alt_pos;
+ double y = direction == 'y' ? node.pos : node.alt_pos;
+
+ x = 100 + 100 * (x - x_center) / x_radius;
+ y = 100 + 100 * (y - y_center) / y_radius;
+
+ const char *color = node.cell == nullptr ? "blue" : "red";
+
+ if (green_nodes != nullptr && green_nodes->count(i))
+ color = "green";
+
+ config.dump_file << stringf("<circle cx=\"%.2f\" cy=\"%.2f\" r=\"3\" fill=\"%s\"/>\n", x, y, color);
+ }
+
+ config.dump_file << stringf("</svg>\n");
+ }
+
+ void run_worker(int indent)
{
int count_cells = 0;
@@ -355,14 +416,19 @@ struct QwpWorker
for (int i = 0; i < indent; i++)
log(" ");
+ string range_str;
+
if (direction == 'x')
- log("x-qwp on X=%.2f:%.2f, Y=%.2f:%.2f with %d cells, %d nodes, and %d edges.\n",
- midpos - radius, midpos + radius, alt_midpos - alt_radius, alt_midpos + alt_radius,
- count_cells, GetSize(nodes), GetSize(edges));
+ range_str = stringf("X=%.2f:%.2f, Y=%.2f:%.2f",
+ midpos - radius, midpos + radius,
+ alt_midpos - alt_radius, alt_midpos + alt_radius);
else
- log("y-qwp on X=%.2f:%.2f, Y=%.2f:%.2f with %d cells, %d nodes, and %d edges.\n",
- alt_midpos - alt_radius, alt_midpos + alt_radius, midpos - radius, midpos + radius,
- count_cells, GetSize(nodes), GetSize(edges));
+ range_str = stringf("X=%.2f:%.2f, Y=%.2f:%.2f",
+ alt_midpos - alt_radius, alt_midpos + alt_radius,
+ midpos - radius, midpos + radius);
+
+ log("%c-qwp on %s with %d cells, %d nodes, and %d edges.\n", direction,
+ range_str.c_str(), count_cells, GetSize(nodes), GetSize(edges));
solve();
@@ -373,25 +439,31 @@ struct QwpWorker
log_assert(node.alt_pos - 0.1 <= alt_midpos + alt_radius);
}
- if (2*radius <= config.grid && 2*alt_radius <= config.grid) {
- log_cell_coordinates(indent + 1);
- return;
- }
-
- // detect median position
+ // detect median position and check for break condition
vector<pair<double, int>> sorted_pos;
for (int i = 0; i < GetSize(nodes); i++)
if (nodes[i].cell != nullptr)
sorted_pos.push_back(pair<double, int>(nodes[i].pos, i));
- if (GetSize(sorted_pos) < 2) {
+ std::sort(sorted_pos.begin(), sorted_pos.end());
+
+ if (config.dump_file.is_open())
+ {
+ config.dump_file << stringf("<h4>LSQ %c-Solution for %s:</h4>\n", direction, range_str.c_str());
+
+ pool<int> green_nodes;
+ for (int i = 0; i < GetSize(sorted_pos)/2; i++)
+ green_nodes.insert(sorted_pos[i].second);
+
+ dump_svg(&green_nodes);
+ }
+
+ if (GetSize(sorted_pos) < 2 || (2*radius <= config.grid && 2*alt_radius <= config.grid)) {
log_cell_coordinates(indent + 1);
return;
}
- std::sort(sorted_pos.begin(), sorted_pos.end());
-
// create child workers
char child_direction = direction == 'x' ? 'y' : 'x';
@@ -474,8 +546,15 @@ struct QwpWorker
// run child workers
- left_worker.run_worker(indent+1, alt_midpos, alt_radius, midpos - radius/2, radius/2);
- right_worker.run_worker(indent+1, alt_midpos, alt_radius, midpos + radius/2, radius/2);
+ left_worker.midpos = right_worker.midpos = alt_midpos;
+ left_worker.radius = right_worker.radius = alt_radius;
+
+ left_worker.alt_midpos = midpos - radius/2;
+ right_worker.alt_midpos = midpos + radius/2;
+ left_worker.alt_radius = right_worker.alt_radius = radius/2;
+
+ left_worker.run_worker(indent+1);
+ right_worker.run_worker(indent+1);
// re-integrate results
@@ -496,8 +575,16 @@ struct QwpWorker
{
log("Running qwp on module %s..\n", log_id(module));
+ if (config.dump_file.is_open())
+ config.dump_file << stringf("<h3>QWP protocol for module %s:</h3>\n", log_id(module));
+
load_module();
- run_worker(1, 0.5, 0.5, 0.5, 0.5);
+
+ midpos = 0.5;
+ radius = 0.5;
+ alt_midpos = 0.5;
+ alt_radius = 0.5;
+ run_worker(1);
for (auto &node : nodes)
if (node.cell != nullptr)
@@ -527,6 +614,9 @@ struct QwpPass : public Pass {
log(" -grid N\n");
log(" Number of grid divisions in x- and y-direction. (default=16)\n");
log("\n");
+ log(" -dump <html_file_name>\n");
+ log(" Dump a protocol of the placement algorithm to the html file.\n");
+ log("\n");
log("Note: This implementation of a quadratic wirelength placer uses unoptimized\n");
log("dense matrix operations. It is only a toy-placer for small circuits.\n");
log("\n");
@@ -552,6 +642,10 @@ struct QwpPass : public Pass {
config.grid = 1.0 / atoi(args[++argidx].c_str());
continue;
}
+ if (args[argidx] == "-dump" && argidx+1 < args.size()) {
+ config.dump_file.open(args[++argidx], std::ofstream::trunc);
+ continue;
+ }
break;
}
extra_args(args, argidx, design);
--
2.30.2