ice40: Implement getRouteBoundingBox for router2

Signed-off-by: David Shah <dave@ds0.me>

2 files changed, 26 insertions, 0 deletions

diff --git a/ice40/arch.cc b/ice40/arch.cc
index edc104f0..b429a1cd 100644
--- a/ice40/arch.cc
+++ b/ice40/arch.cc
@@ -1255,6 +1255,30 @@ void Arch::assignCellInfo(CellInfo *cell)
     }
 }
 
+ArcBounds Arch::getRouteBoundingBox(WireId src, WireId dst) const
+{
+    ArcBounds bb;
+
+    int src_x = chip_info->wire_data[src.index].x;
+    int src_y = chip_info->wire_data[src.index].y;
+    int dst_x = chip_info->wire_data[dst.index].x;
+    int dst_y = chip_info->wire_data[dst.index].y;
+
+    bb.x0 = src_x;
+    bb.y0 = src_y;
+    bb.x1 = src_x;
+    bb.y1 = src_y;
+
+    auto extend = [&](int x, int y) {
+        bb.x0 = std::min(bb.x0, x);
+        bb.x1 = std::max(bb.x1, x);
+        bb.y0 = std::min(bb.y0, y);
+        bb.y1 = std::max(bb.y1, y);
+    };
+    extend(dst_x, dst_y);
+    return bb;
+}
+
 #ifdef WITH_HEAP
 const std::string Arch::defaultPlacer = "heap";
 #else
diff --git a/ice40/arch.h b/ice40/arch.h
index a6a3cd70..f2f9069a 100644
--- a/ice40/arch.h
+++ b/ice40/arch.h
@@ -826,6 +826,8 @@ struct Arch : BaseCtx
     uint32_t getDelayChecksum(delay_t v) const { return v; }
     bool getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const;
 
+    ArcBounds getRouteBoundingBox(WireId src, WireId dst) const;
+
     // -------------------------------------------------
 
     bool pack();