diff options
Diffstat (limited to 'fpga_interchange/arch.cc')
| -rw-r--r-- | fpga_interchange/arch.cc | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fpga_interchange/arch.cc b/fpga_interchange/arch.cc index 05b50ae2..6a7c4fe1 100644 --- a/fpga_interchange/arch.cc +++ b/fpga_interchange/arch.cc @@ -301,6 +301,12 @@ void Arch::init() for (size_t tile_type = 0; tile_type < chip_info->tile_types.size(); ++tile_type) { pseudo_pip_data.init_tile_type(getCtx(), tile_type); } + + // Warn if there is no preferred constant net defined in the architecture + IdString const_net_name(getCtx()->chip_info->constants->best_constant_net); + if (const_net_name == IdString()) { + log_warning("The architecture does not specify preferred constant net. Using VCC as default.\n"); + } } // ----------------------------------------------------------------------- @@ -877,7 +883,12 @@ static void prepare_sites_for_routing(Context *ctx) IdString gnd_net_name(ctx->chip_info->constants->gnd_net_name); IdString const_net_name(ctx->chip_info->constants->best_constant_net); - NPNR_ASSERT(const_net_name == vcc_net_name || const_net_name == gnd_net_name); + NPNR_ASSERT(const_net_name == IdString() || const_net_name == vcc_net_name || const_net_name == gnd_net_name); + + // FIXME: Use VCC if the architecture does not device the best constant + if (const_net_name == IdString()) { + const_net_name = vcc_net_name; + } for (BelId bel : ctx->getBels()) { CellInfo *cell = ctx->getBoundBelCell(bel); |