ice40: Pack RAMs

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

1 files changed, 8 insertions, 1 deletions

diff --git a/ice40/cells.h b/ice40/cells.h
index 660c7265..e5b4fa9c 100644
--- a/ice40/cells.h
+++ b/ice40/cells.h
@@ -51,7 +51,14 @@ inline bool is_ff(const CellInfo *cell)
 inline bool is_sb_io(const CellInfo *cell) { return cell->type == "SB_IO"; }
 
 // Return true if a cell is a global buffer
-inline bool is_gbuf(const CellInfo *cell) {return cell->type == "SB_GB"; }
+inline bool is_gbuf(const CellInfo *cell) { return cell->type == "SB_GB"; }
+
+// Return true if a cell is a RAM
+inline bool is_ram(const CellInfo *cell)
+{
+    return cell->type == "SB_RAM40_4K" || cell->type == "SB_RAM40_4KNR" ||
+           cell->type == "SB_RAM40_4KNW" || cell->type == "SB_RAM40_4KNRNW";
+}
 
 // Convert a SB_LUT primitive to (part of) an ICESTORM_LC, swapping ports
 // as needed. Set no_dff if a DFF is not being used, so that the output