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nexus: Add WIDEFN9 support

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-10-22 16:54:49 +01:00
parent 00ff7c6cfe
commit c89d830e16
1 changed files with 47 additions and 0 deletions
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47
nexus/pack.cc
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@ -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();