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| author | David Shah <dave@ds0.me> | 2019-01-08 13:06:02 +0000 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2019-02-25 11:49:25 +0000 |
| commit | f5b11ce075544d00ccafaf4363d099b6f1806335 (patch) | |
| tree | f1fc8d214c55daef98f05a05ffd8123007cfbd01 /ecp5 | |
| parent | af3ff143be312b0f73289955bd513925f2bb7c4f (diff) | |
| download | nextpnr-f5b11ce075544d00ccafaf4363d099b6f1806335.tar.gz nextpnr-f5b11ce075544d00ccafaf4363d099b6f1806335.tar.bz2 nextpnr-f5b11ce075544d00ccafaf4363d099b6f1806335.zip | |
ecp5: Implement budget overrides for carry chains and SLICE muxes
Signed-off-by: David Shah <dave@ds0.me>
Diffstat (limited to 'ecp5')
| -rw-r--r-- | ecp5/arch.cc | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/ecp5/arch.cc b/ecp5/arch.cc index 1abb8af0..ad207d14 100644 --- a/ecp5/arch.cc +++ b/ecp5/arch.cc @@ -454,14 +454,24 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const delay_t Arch::predictDelay(const NetInfo *net_info, const PortRef &sink) const { const auto &driver = net_info->driver; - if (driver.port == id_FCO && sink.port == id_FCI) + if ((driver.port == id_FCO && sink.port == id_FCI) || sink.port == id_FXA || sink.port == id_FXB) return 0; auto driver_loc = getBelLocation(driver.cell->bel); auto sink_loc = getBelLocation(sink.cell->bel); return (110 - 10 * args.speed) + (200 - 20 * args.speed) * (abs(driver_loc.x - sink_loc.x) + abs(driver_loc.y - sink_loc.y)); } -bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const { return false; } +bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const { + if (net_info->driver.port == id_FCO && sink.port == id_FCI) { + return true; + budget = 0; + } else if (sink.port == id_FXA || sink.port == id_FXB) { + return true; + budget = 0; + } else { + return false; + } +} // ----------------------------------------------------------------------- |