diff options
Diffstat (limited to 'nexus/pack.cc')
| -rw-r--r-- | nexus/pack.cc | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/nexus/pack.cc b/nexus/pack.cc index e12ce305..ea3b4aca 100644 --- a/nexus/pack.cc +++ b/nexus/pack.cc @@ -1074,6 +1074,52 @@ struct NexusPacker } } + void pack_widefn() + { + std::vector<CellInfo *> widefns; + for (auto cell : sorted(ctx->cells)) { + CellInfo *ci = cell.second; + if (ci->type != id_WIDEFN9) + continue; + widefns.push_back(ci); + } + + for (CellInfo *ci : widefns) { + std::vector<CellInfo *> combs; + for (int i = 0; i < 2; i++) + combs.push_back( + ctx->createCell(ctx->id(stringf("%s$widefn_comb[%d]$", ctx->nameOf(ci), i)), id_OXIDE_COMB)); + + for (int i = 0; i < 2; i++) { + replace_port(ci, bus_flat("A", i), combs[i], id_A); + replace_port(ci, bus_flat("B", i), combs[i], id_B); + replace_port(ci, bus_flat("C", i), combs[i], id_C); + replace_port(ci, bus_flat("D", i), combs[i], id_D); + } + + replace_port(ci, id_SEL, combs[0], id_SEL); + replace_port(ci, id_Z, combs[0], id_OFX); + + NetInfo *f1 = ctx->createNet(ctx->id(stringf("%s$widefn_f1$", ctx->nameOf(ci)))); + combs[0]->addInput(id_F1); + combs[1]->addOutput(id_F); + connect_port(ctx, f1, combs[1], id_F); + connect_port(ctx, f1, combs[0], id_F1); + + combs[0]->params[id_INIT] = ctx->parse_lattice_param(ci, id_INIT0, 16, 0); + combs[1]->params[id_INIT] = ctx->parse_lattice_param(ci, id_INIT1, 16, 0); + + combs[1]->constr_parent = combs[0]; + combs[1]->constr_x = 0; + combs[1]->constr_y = 0; + combs[1]->constr_z = 1; + combs[1]->constr_abs_z = false; + combs[0]->constr_children.push_back(combs[1]); + + ctx->cells.erase(ci->name); + } + } + explicit NexusPacker(Context *ctx) : ctx(ctx) {} void operator()() @@ -1082,6 +1128,7 @@ struct NexusPacker convert_prims(); pack_bram(); pack_lutram(); + pack_widefn(); pack_ffs(); pack_constants(); pack_luts(); |