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| author | gatecat <gatecat@ds0.me> | 2021-09-24 19:12:01 +0100 |
|---|---|---|
| committer | gatecat <gatecat@ds0.me> | 2021-09-24 19:19:26 +0100 |
| commit | 718ee441a0dcf7328692c67d143f2b26b8ebc61c (patch) | |
| tree | adfb3dde2e6a46f5a9907f7aee66b017c8608a1f /nexus | |
| parent | ab6990f908c9f25c6116ca8f1a4f98242e8b6175 (diff) | |
| download | nextpnr-718ee441a0dcf7328692c67d143f2b26b8ebc61c.tar.gz nextpnr-718ee441a0dcf7328692c67d143f2b26b8ebc61c.tar.bz2 nextpnr-718ee441a0dcf7328692c67d143f2b26b8ebc61c.zip | |
nexus: Add resource cost overrides
Signed-off-by: gatecat <gatecat@ds0.me>
Diffstat (limited to 'nexus')
| -rw-r--r-- | nexus/arch.cc | 21 | ||||
| -rw-r--r-- | nexus/arch.h | 2 |
2 files changed, 21 insertions, 2 deletions
diff --git a/nexus/arch.cc b/nexus/arch.cc index 95474800..ee7f6304 100644 --- a/nexus/arch.cc +++ b/nexus/arch.cc @@ -705,6 +705,21 @@ void Arch::pre_routing() } } } +namespace { +float router2_base_cost(Context *ctx, WireId wire, PipId pip, float crit_weight) +{ + (void)crit_weight; // unused + if (pip != PipId()) { + auto &data = ctx->pip_data(pip); + if (data.flags & PIP_ZERO_RR_COST) + return 1e-12; + if (data.flags & PIP_DRMUX_C) + return 1e15; + } + return ctx->getDelayNS(ctx->getPipDelay(pip).maxDelay() + ctx->getWireDelay(wire).maxDelay() + + ctx->getDelayEpsilon()); +} +} // namespace bool Arch::route() { @@ -719,7 +734,9 @@ bool Arch::route() if (router == "router1") { result = router1(getCtx(), Router1Cfg(getCtx())); } else if (router == "router2") { - router2(getCtx(), Router2Cfg(getCtx())); + Router2Cfg cfg(getCtx()); + cfg.get_base_cost = router2_base_cost; + router2(getCtx(), cfg); result = true; } else { log_error("Nexus architecture does not support router '%s'\n", router.c_str()); @@ -1030,7 +1047,7 @@ const std::vector<std::string> Arch::availablePlacers = {"sa", }; -const std::string Arch::defaultRouter = "router1"; +const std::string Arch::defaultRouter = "router2"; const std::vector<std::string> Arch::availableRouters = {"router1", "router2"}; NEXTPNR_NAMESPACE_END diff --git a/nexus/arch.h b/nexus/arch.h index 300c3760..3e718e78 100644 --- a/nexus/arch.h +++ b/nexus/arch.h @@ -87,6 +87,8 @@ enum PipFlags { PIP_FIXED_CONN = 0x8000, PIP_LUT_PERM = 0x4000, + PIP_ZERO_RR_COST = 0x2000, + PIP_DRMUX_C = 0x1000, }; NPNR_PACKED_STRUCT(struct PipInfoPOD { |