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[Tool] Now repack consider design constraints; test pending

This commit is contained in:
tangxifan 2021-01-16 21:57:17 -07:00
parent d0e05b3575
commit 2efe513122
2 changed files with 30 additions and 0 deletions
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3
libopenfpga/librepackdc/src/repack_design_constraints.h
View File

@ -17,6 +17,9 @@
#include "repack_design_constraints_fwd.h"
/* Constants */
constexpr char* REPACK_DESIGN_CONSTRAINT_OPEN_NET = "OPEN";
/********************************************************************
* A data structure to describe the design constraints for repacking tools
* This data structure may include a number of design constraints

27
openfpga/src/repack/repack.cpp
View File

@ -410,6 +410,33 @@ void add_lb_router_nets(LbRouter& lb_router,
/* Find the net mapped to this pin in clustering results*/
AtomNetId atom_net_id = pb_pin_mapped_nets[source_pb_pin];
/* Check if the net information is constrained or not */
std::string constrained_net_name;
for (const RepackDesignConstraintId& design_constraint : design_constraints.design_constraints()) {
/* All the pin must have only 1 bit */
VTR_ASSERT_SAFE(1 == design_constraints.pin(design_constraint).get_width());
/* If found a constraint, record the net name */
if ( (std::string(lb_type->pb_type->name) == design_constraints.pb_type(design_constraint))
&& (std::string(source_pb_pin->port->name) == design_constraints.pin(design_constraint).get_name())
&& (size_t(source_pb_pin->pin_number) == design_constraints.pin(design_constraint).get_lsb())) {
constrained_net_name = design_constraints.net(design_constraint);
break;
}
}
/* If the pin is constrained, we need to
* - if this is an open net, for invalid net then
* - if this is valid net name, find the net id from atom_netlist and overwrite the atom net id to mapped
*/
if (!constrained_net_name.empty()) {
if (std::string(REPACK_DESIGN_CONSTRAINT_OPEN_NET) == constrained_net_name) {
atom_net_id == AtomNetId::INVALID();
} else {
VTR_ASSERT_SAFE(std::string(REPACK_DESIGN_CONSTRAINT_OPEN_NET) != constrained_net_name);
atom_net_id = atom_ctx.nlist.find_net(constrained_net_name);
}
}
/* Bypass unmapped pins */
if (AtomNetId::INVALID() == atom_net_id) {
continue;