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| author | Keith Rothman <537074+litghost@users.noreply.github.com> | 2021-03-23 16:53:42 -0700 |
|---|---|---|
| committer | Keith Rothman <537074+litghost@users.noreply.github.com> | 2021-03-25 17:20:09 -0700 |
| commit | 77bc2f9130204e40023411c3fd13b3a3a3aa8a5b (patch) | |
| tree | 976e407dd05455dab6d425ed3db2cc96e7be4d87 /fpga_interchange/site_arch.impl.h | |
| parent | 5e96740451912cbd68aecdbe58d776831d282cba (diff) | |
| download | nextpnr-77bc2f9130204e40023411c3fd13b3a3a3aa8a5b.tar.gz nextpnr-77bc2f9130204e40023411c3fd13b3a3a3aa8a5b.tar.bz2 nextpnr-77bc2f9130204e40023411c3fd13b3a3a3aa8a5b.zip | |
Add initial handling of local site inverters and constant signals.
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
Diffstat (limited to 'fpga_interchange/site_arch.impl.h')
| -rw-r--r-- | fpga_interchange/site_arch.impl.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fpga_interchange/site_arch.impl.h b/fpga_interchange/site_arch.impl.h index 0be298c9..a471b690 100644 --- a/fpga_interchange/site_arch.impl.h +++ b/fpga_interchange/site_arch.impl.h @@ -295,6 +295,25 @@ inline bool SiteArch::canInvert(const SitePip &site_pip) const return bel_data.non_inverting_pin == pip_data.extra_data && bel_data.inverting_pin == pip_data.extra_data; } +inline PhysicalNetlist::PhysNetlist::NetType SiteArch::prefered_constant_net_type(const SitePip &site_pip) const +{ + // FIXME: Implement site port overrides from chipdb once available. + IdString prefered_constant_net(ctx->chip_info->constants->best_constant_net); + IdString gnd_net_name(ctx->chip_info->constants->gnd_net_name); + IdString vcc_net_name(ctx->chip_info->constants->vcc_net_name); + + if (prefered_constant_net == IdString()) { + return PhysicalNetlist::PhysNetlist::NetType::SIGNAL; + } else if (prefered_constant_net == gnd_net_name) { + return PhysicalNetlist::PhysNetlist::NetType::GND; + } else if (prefered_constant_net == vcc_net_name) { + return PhysicalNetlist::PhysNetlist::NetType::VCC; + } else { + log_error("prefered_constant_net %s is not the GND (%s) or VCC(%s) net?\n", prefered_constant_net.c_str(ctx), + gnd_net_name.c_str(ctx), vcc_net_name.c_str(ctx)); + } +} + NEXTPNR_NAMESPACE_END #endif /* SITE_ARCH_H */ |