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[Tool] Patch a critical bug in pb pin fixup

This commit is contained in:
tangxifan 2021-04-22 16:19:54 -06:00
parent 1dcb8e39a9
commit 56948244bc
1 changed files with 30 additions and 1 deletions
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31
openfpga/src/base/openfpga_pb_pin_fixup.cpp
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@ -96,20 +96,49 @@ void update_cluster_pin_with_post_routing_results(const DeviceContext& device_ct
/* Find the net mapped to this pin in clustering results*/
ClusterNetId cluster_net_id = clustering_ctx.clb_nlist.block_net(blk_id, j);
/* Ignore those net have never been routed */
/* Ignore those net have never been routed: this check is valid only
* when both packer has mapped a net to the pin and the router leaves the pin to be unmapped
* This is important because we cannot bypass when router forces a valid net to be mapped
* and the net remapping has to be considered
*/
if ( (ClusterNetId::INVALID() != cluster_net_id)
&& (ClusterNetId::INVALID() == routing_net_id)
&& (true == clustering_ctx.clb_nlist.net_is_ignored(cluster_net_id))) {
VTR_LOGV(verbose,
"Bypass net at clustered block '%s' pin 'grid[%ld][%ld].%s.%s[%d]' as it is not routed\n",
clustering_ctx.clb_nlist.block_pb(blk_id)->name,
grid_coord.x(), grid_coord.y(),
clustering_ctx.clb_nlist.block_pb(blk_id)->pb_graph_node->pb_type->name,
get_pb_graph_node_pin_from_block_pin(blk_id, physical_pin)->port->name,
get_pb_graph_node_pin_from_block_pin(blk_id, physical_pin)->pin_number
);
continue;
}
/* Ignore used in local cluster only, reserved one CLB pin */
if ( (ClusterNetId::INVALID() != cluster_net_id)
&& (0 == clustering_ctx.clb_nlist.net_sinks(cluster_net_id).size())) {
VTR_LOGV(verbose,
"Bypass net at clustered block '%s' pin 'grid[%ld][%ld].%s.%s[%d]' as it is a local net inside the cluster\n",
clustering_ctx.clb_nlist.block_pb(blk_id)->name,
grid_coord.x(), grid_coord.y(),
clustering_ctx.clb_nlist.block_pb(blk_id)->pb_graph_node->pb_type->name,
get_pb_graph_node_pin_from_block_pin(blk_id, physical_pin)->port->name,
get_pb_graph_node_pin_from_block_pin(blk_id, physical_pin)->pin_number
);
continue;
}
/* If matched, we finish here */
if (routing_net_id == cluster_net_id) {
VTR_LOGV(verbose,
"Bypass net at clustered block '%s' pin 'grid[%ld][%ld].%s.%s[%d]' as it matches cluster routing\n",
clustering_ctx.clb_nlist.block_pb(blk_id)->name,
grid_coord.x(), grid_coord.y(),
clustering_ctx.clb_nlist.block_pb(blk_id)->pb_graph_node->pb_type->name,
get_pb_graph_node_pin_from_block_pin(blk_id, physical_pin)->port->name,
get_pb_graph_node_pin_from_block_pin(blk_id, physical_pin)->pin_number
);
continue;
}