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| author | David Shah <dave@ds0.me> | 2020-10-22 19:25:17 +0100 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-11-30 08:45:28 +0000 |
| commit | e6c28877735444c3bf7927a771cafd9f35bdac72 (patch) | |
| tree | c9f7fcf99d78ead31707413eed10d54e822d71de /nexus/arch_place.cc | |
| parent | c89d830e1689116955c9257dd2933ff49eceeaba (diff) | |
| download | nextpnr-e6c28877735444c3bf7927a771cafd9f35bdac72.tar.gz nextpnr-e6c28877735444c3bf7927a771cafd9f35bdac72.tar.bz2 nextpnr-e6c28877735444c3bf7927a771cafd9f35bdac72.zip | |
nexus: Basic support for carries
Signed-off-by: David Shah <dave@ds0.me>
Diffstat (limited to 'nexus/arch_place.cc')
| -rw-r--r-- | nexus/arch_place.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/nexus/arch_place.cc b/nexus/arch_place.cc index feec75ad..35b14caf 100644 --- a/nexus/arch_place.cc +++ b/nexus/arch_place.cc @@ -59,6 +59,8 @@ bool Arch::nexus_logic_tile_valid(LogicTileStatus <s) const // If LUT1 is carry then LUT0 must be carry too if (lut1->lutInfo.is_carry && (lut0 == nullptr || !lut0->lutInfo.is_carry)) return false; + if (!lut1->lutInfo.is_carry && lut0 != nullptr && lut0->lutInfo.is_carry) + return false; } // Check for correct use of FF1 DI if (ff1 != nullptr && ff1->ffInfo.di != nullptr && (lut1 == nullptr || ff1->ffInfo.di != lut1->lutInfo.f)) |