Adding stubs for delay annotation and cell timing lookup

Signed-off-by: David Shah <davey1576@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/ice40/arch.h b/ice40/arch.h
index c1256a41..172541c0 100644
--- a/ice40/arch.h
+++ b/ice40/arch.h
@@ -755,6 +755,16 @@ struct Arch : BaseCtx
     std::unordered_set<BelId> belGraphicsReload;
     std::unordered_set<WireId> wireGraphicsReload;
     std::unordered_set<PipId> pipGraphicsReload;
+
+    // -------------------------------------------------
+
+    // Get the delay through a cell from one port to another
+    delay_t getCellDelay(const CellInfo *cell, IdString fromPort,
+                         IdString toPort) const;
+    // Get the associated clock to a port, or empty if the port is combinational
+    IdString getPortClock(const CellInfo *cell, IdString port) const;
+    // Return true if a port is a clock
+    bool isClockPort(const CellInfo *cell, IdString port) const;
 };
 
 NEXTPNR_NAMESPACE_END