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[core] supporting clk spine on the same direction

This commit is contained in:
tangxifan 2024-07-16 22:12:51 -07:00
parent 18d12109fb
commit 1513ea749b
1 changed files with 55 additions and 0 deletions
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55
openfpga/src/annotation/append_clock_rr_graph.cpp
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@ -402,6 +402,61 @@ static std::vector<RRNodeId> find_clock_track2track_node(
des_nodes.push_back(right_des_node);
}
/* U-turn or straight connections */
vtr::Point<size_t> top_des_coord = chan_coord;
Direction top_direction = direction;
t_rr_type top_des_chan_type = chan_type;
if (chan_type == CHANX) {
if (direction == Direction::INC) {
/*
* ^
* |
* +
* |
* ^
* |
*/
right_direction = Direction::DEC;
} else {
/*
* ^
* |
* +<--
*/
VTR_ASSERT(direction == Direction::DEC);
right_direction = Direction::INC;
right_des_coord.set_x(right_des_coord.x() - 1);
right_des_coord.set_y(right_des_coord.y() + 1);
}
} else {
VTR_ASSERT(chan_type == CHANY);
right_des_chan_type = CHANX;
if (direction == Direction::INC) {
/*
* +-->
* ^
* |
*/
right_des_coord.set_x(right_des_coord.x() + 1);
} else {
VTR_ASSERT(direction == Direction::DEC);
/*
* |
* v
* <--+
*/
right_des_coord.set_y(right_des_coord.y() - 1);
}
}
RRNodeId right_des_node =
clk_rr_lookup.find_node(right_des_coord.x(), right_des_coord.y(), clk_tree,
next_clk_lvl, clk_pin, right_direction);
if (rr_graph_view.valid_node(right_des_node)) {
VTR_ASSERT(right_des_chan_type == rr_graph_view.node_type(right_des_node));
des_nodes.push_back(right_des_node);
}
return des_nodes;
}