1 files changed, 10 insertions, 0 deletions
diff --git a/generic/archdefs.h b/generic/archdefs.h
index 2452aa17..978c9c9b 100644
--- a/generic/archdefs.h
+++ b/generic/archdefs.h
@@ -55,8 +55,18 @@ typedef IdString DecalId;
 struct ArchNetInfo
 {
 };
+
+struct NetInfo;
+
 struct ArchCellInfo
 {
+    // Custom grouping set via "PACK_GROUP" attribute. All cells with the same group
+    // value may share a tile (-1 = don't care, default if not set)
+    int user_group;
+    // Is a slice type primitive
+    bool is_slice;
+    // Only packing rule for slice type primitives is a single clock per tile
+    const NetInfo *slice_clk;
 };
 
 NEXTPNR_NAMESPACE_END