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| author | Eddie Hung <eddieh@ece.ubc.ca> | 2019-01-29 11:22:31 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-01-29 11:22:31 -0800 |
| commit | 6d664046d3774c8fa2a9dccb64dd8ab06cc0cd0a (patch) | |
| tree | 5c6fc5bcd414aa9d8e47f5347960b0260ef8fd19 /ice40/arch.cc | |
| parent | 6cc1bfcb37199e0988d0f06ce34071b409ab8019 (diff) | |
| parent | 77bb5ea63a86f2ce5feb2f3ee13d920c85c29111 (diff) | |
| download | nextpnr-6d664046d3774c8fa2a9dccb64dd8ab06cc0cd0a.tar.gz nextpnr-6d664046d3774c8fa2a9dccb64dd8ab06cc0cd0a.tar.bz2 nextpnr-6d664046d3774c8fa2a9dccb64dd8ab06cc0cd0a.zip | |
Merge pull request #220 from YosysHQ/coi3
ice40: Add budget override for CO->I3 path
Diffstat (limited to 'ice40/arch.cc')
| -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: |