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[core] refactor codes

This commit is contained in:
tangxifan 2024-06-27 12:39:18 -07:00
parent 7892c2340c
commit e75fd57af2
1 changed files with 202 additions and 142 deletions
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100
openfpga/src/annotation/route_clock_rr_graph.cpp
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@ -79,31 +79,15 @@ static int build_clock_tree_net_map(
}
/********************************************************************
* Route a clock tree on an existing routing resource graph
* The strategy is to route spine one by one
* Route a selected clock spine in a staight line
* - route the spine from the starting point to the ending point
* - route the spine-to-spine switching points
* - route the spine-to-IPIN connections (only for the last level)
*******************************************************************/
static int route_clock_tree_rr_graph(
static int route_straight_spines(
VprRoutingAnnotation& vpr_routing_annotation, const RRGraphView& rr_graph,
const RRClockSpatialLookup& clk_rr_lookup,
const vtr::vector<RRNodeId, ClusterNetId>& rr_node_gnets,
const std::map<ClockTreePinId, ClusterNetId>& tree2clk_pin_map,
const ClockNetwork& clk_ntwk, const ClockTreeId& clk_tree,
const bool& disable_unused_trees,
const ClockSpineId& ispine, const ClockTreePinId& ipin,
const bool& verbose) {
for (auto ispine : clk_ntwk.spines(clk_tree)) {
VTR_LOGV(verbose, "Routing spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
for (auto ipin : clk_ntwk.pins(clk_tree)) {
/* Do not route unused clock spines */
if (disable_unused_trees && tree2clk_pin_map.find(ipin) == tree2clk_pin_map.end()) {
VTR_LOGV(verbose, "Skip routing backbone of unused spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
continue;
}
/* Route the spine from starting point to ending point */
std::vector<vtr::Point<int>> spine_coords =
clk_ntwk.spine_coordinates(ispine);
VTR_LOGV(verbose, "Routing backbone of spine '%s'...\n",
@ -126,7 +110,22 @@ static int route_clock_tree_rr_graph(
vpr_routing_annotation.set_rr_node_prev_node(rr_graph, des_node,
src_node);
}
/* Route the spine-to-spine switching points */
return CMD_EXEC_SUCCESS;
}
/********************************************************************
* Route a switching points between spines
* - connect between two routing tracks (left or right turns)
* - connect internal driver to routing track
*******************************************************************/
static int route_spine_switch_points(
VprRoutingAnnotation& vpr_routing_annotation, const RRGraphView& rr_graph,
const RRClockSpatialLookup& clk_rr_lookup,
const vtr::vector<RRNodeId, ClusterNetId>& rr_node_gnets,
const std::map<ClockTreePinId, ClusterNetId>& tree2clk_pin_map,
const ClockNetwork& clk_ntwk, const ClockTreeId& clk_tree,
const ClockSpineId& ispine, const ClockTreePinId& ipin,
const bool& verbose) {
VTR_LOGV(verbose, "Routing switch points of spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
for (ClockSwitchPointId switch_point_id :
@ -199,6 +198,24 @@ static int route_clock_tree_rr_graph(
tree2clk_pin_map.at(ipin));
}
}
return CMD_EXEC_SUCCESS;
}
/********************************************************************
* Route a spine to its tap points
* - Only connect to tap points which are mapped by a global net
*******************************************************************/
static int route_spine_taps(
VprRoutingAnnotation& vpr_routing_annotation, const RRGraphView& rr_graph,
const RRClockSpatialLookup& clk_rr_lookup,
const vtr::vector<RRNodeId, ClusterNetId>& rr_node_gnets,
const std::map<ClockTreePinId, ClusterNetId>& tree2clk_pin_map,
const ClockNetwork& clk_ntwk, const ClockTreeId& clk_tree,
const ClockSpineId& ispine, const ClockTreePinId& ipin,
const bool& verbose) {
std::vector<vtr::Point<int>> spine_coords =
clk_ntwk.spine_coordinates(ispine);
/* Route the spine-to-IPIN connections (only for the last level) */
if (clk_ntwk.is_last_level(ispine)) {
VTR_LOGV(verbose, "Routing clock taps of spine '%s'...\n",
@ -252,6 +269,49 @@ static int route_clock_tree_rr_graph(
}
}
}
return CMD_EXEC_SUCCESS;
}
/********************************************************************
* Route a clock tree on an existing routing resource graph
* The strategy is to route spine one by one
* - route the spine from the starting point to the ending point
* - route the spine-to-spine switching points
* - route the spine-to-IPIN connections (only for the last level)
*******************************************************************/
static int route_clock_tree_rr_graph(
VprRoutingAnnotation& vpr_routing_annotation, const RRGraphView& rr_graph,
const RRClockSpatialLookup& clk_rr_lookup,
const vtr::vector<RRNodeId, ClusterNetId>& rr_node_gnets,
const std::map<ClockTreePinId, ClusterNetId>& tree2clk_pin_map,
const ClockNetwork& clk_ntwk, const ClockTreeId& clk_tree,
const bool& disable_unused_trees,
const bool& verbose) {
for (auto ispine : clk_ntwk.spines(clk_tree)) {
VTR_LOGV(verbose, "Routing spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
for (auto ipin : clk_ntwk.pins(clk_tree)) {
/* Do not route unused clock spines */
if (disable_unused_trees && tree2clk_pin_map.find(ipin) == tree2clk_pin_map.end()) {
VTR_LOGV(verbose, "Skip routing backbone of unused spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
continue;
}
/* Route the spine from starting point to ending point */
std::vector<vtr::Point<int>> spine_coords =
clk_ntwk.spine_coordinates(ispine);
if (CMD_EXEC_SUCCESS != route_straight_spines(vpr_routing_annotation, rr_graph, clk_rr_lookup, clk_ntwk, clk_tree, ispine, ipin, verbose)) {
return CMD_EXEC_FATAL_ERROR;
}
/* Route the opin/spine-to-spine switching points */
if (CMD_EXEC_SUCCESS != route_spine_switch_points(vpr_routing_annotation, rr_graph, clk_rr_lookup, rr_node_gnets, tree2clk_pin_map, clk_ntwk, clk_tree, ispine, ipin, verbose)) {
return CMD_EXEC_FATAL_ERROR;
}
/* Route the spine-to-IPIN connections (only for the last level) */
if (CMD_EXEC_SUCCESS != route_spine_taps(vpr_routing_annotation, rr_graph, clk_rr_lookup, rr_node_gnets, tree2clk_pin_map, clk_ntwk, clk_tree, ispine, ipin, verbose)) {
return CMD_EXEC_FATAL_ERROR;
}
}
}
return CMD_EXEC_SUCCESS;