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Diffstat (limited to 'mistral/archdefs.h')
| -rw-r--r-- | mistral/archdefs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mistral/archdefs.h b/mistral/archdefs.h index 35b5bf63..181bc618 100644 --- a/mistral/archdefs.h +++ b/mistral/archdefs.h @@ -182,6 +182,13 @@ struct ArchCellInfo : BaseClusterInfo int used_lut_input_count; // excluding those null/constant int lut_bits_count; + // for the LAB routeability check (see the detailed description in lab.cc); usually the same signal feeding + // multiple ALMs in a LAB is counted multiple times, due to not knowing which routing resources it will need + // in each case. But carry chains where we know how things will pack are allowed to share across ALMs as a + // special case, primarily to support adders/subtractors with a 'B invert' control signal shared across all + // ALMs. + int chain_shared_input_count; + bool is_carry, is_shared, is_extended; bool carry_start, carry_end; } combInfo; |