diff options
Diffstat (limited to 'ice40')
| -rw-r--r-- | ice40/arch.cc | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/ice40/arch.cc b/ice40/arch.cc index e674b4c9..f6084e72 100644 --- a/ice40/arch.cc +++ b/ice40/arch.cc @@ -594,26 +594,29 @@ std::vector<GroupId> Arch::getGroupGroups(GroupId group) const bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const { const auto &driver = net_info->driver; - if (driver.port == id_COUT && sink.port == id_CIN) { - if (driver.cell->constr_abs_z && driver.cell->constr_z < 7) + if (driver.port == id_COUT) { + NPNR_ASSERT(sink.port == id_CIN || sink.port == id_I3); + NPNR_ASSERT(driver.cell->constr_abs_z); + bool cin = sink.port == id_CIN; + bool same_y = driver.cell->constr_z < 7; + if (cin && same_y) budget = 0; else { - NPNR_ASSERT(driver.cell->constr_z == 7); switch (args.type) { #ifndef ICE40_HX1K_ONLY case ArchArgs::HX8K: #endif case ArchArgs::HX1K: - budget = 190; + budget = cin ? 190 : (same_y ? 260 : 560); break; #ifndef ICE40_HX1K_ONLY case ArchArgs::LP384: case ArchArgs::LP1K: case ArchArgs::LP8K: - budget = 290; + budget = cin ? 290 : (same_y ? 380 : 670); break; case ArchArgs::UP5K: - budget = 560; + budget = cin ? 560 : (same_y ? 660 : 1220); break; #endif default: |