2 files changed, 46 insertions, 3 deletions
diff --git a/dummy/chip.cc b/dummy/chip.cc
index ae962508..bab65ae4 100644
--- a/dummy/chip.cc
+++ b/dummy/chip.cc
@@ -17,6 +17,7 @@
  *
  */
 
+#include <math.h>
 #include "nextpnr.h"
 
 NEXTPNR_NAMESPACE_BEGIN
@@ -138,6 +139,42 @@ const std::vector<PipId> &Chip::getWireAliases(WireId wire) const
     return ret;
 }
 
+// ---------------------------------------------------------------
+
+PosInfo Chip::getBelPosition(BelId bel) const
+{
+    PosInfo pos;
+    assert(bel != BelId());
+    // pos.x = ...;
+    // pos.y = ...;
+    return pos;
+}
+
+PosInfo Chip::getWirePosition(WireId wire) const
+{
+    PosInfo pos;
+    assert(wire != WireId());
+    // pos.x = ...;
+    // pos.y = ...;
+    return pos;
+}
+
+PosInfo Chip::getPipPosition(PipId pip) const
+{
+    PosInfo pos;
+    assert(pip != PipId());
+    // pos.x = ...;
+    // pos.y = ...;
+    return pos;
+}
+
+float Chip::estimateDelay(PosInfo src, PosInfo dst) const
+{
+    return fabsf(src.x - dst.x) + fabsf(src.x - dst.x);
+}
+
+// ---------------------------------------------------------------
+
 std::vector<GraphicElement> Chip::getBelGraphics(BelId bel) const
 {
     static std::vector<GraphicElement> ret;
diff --git a/dummy/chip.h b/dummy/chip.h
index e5a6dd56..bc70fa5d 100644
--- a/dummy/chip.h
+++ b/dummy/chip.h
@@ -42,6 +42,11 @@ struct DelayInfo
     }
 };
 
+struct PosInfo
+{
+    float x = 0, y = 0;
+};
+
 typedef IdString BelType;
 typedef IdString PortPin;
 
@@ -108,9 +113,10 @@ struct Chip
     const std::vector<PipId> &getPipsUphill(WireId wire) const;
     const std::vector<PipId> &getWireAliases(WireId wire) const;
 
-    void getBelPosition(BelId bel, float &x, float &y) const;
-    void getWirePosition(WireId wire, float &x, float &y) const;
-    void getPipPosition(PipId pip, float &x, float &y) const;
+    PosInfo getBelPosition(BelId bel) const;
+    PosInfo getWirePosition(WireId wire) const;
+    PosInfo getPipPosition(PipId pip) const;
+    float estimateDelay(PosInfo src, PosInfo dst) const;
 
     std::vector<GraphicElement> getBelGraphics(BelId bel) const;
     std::vector<GraphicElement> getWireGraphics(WireId wire) const;