From 7787ce5fd934b2d794e1fa15b6e8007ed07080e6 Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Thu, 14 Jun 2018 12:43:00 +0200
Subject: Refactor position/delay estimation API

Signed-off-by: Clifford Wolf <clifford@clifford.at>
---
 ice40/chip.cc       | 36 +++++++++++++-----------------------
 ice40/chip.h        | 11 ++---------
 ice40/pybindings.cc |  4 ++--
 3 files changed, 17 insertions(+), 34 deletions(-)

(limited to 'ice40')

diff --git a/ice40/chip.cc b/ice40/chip.cc
index 87428339..b40963bf 100644
--- a/ice40/chip.cc
+++ b/ice40/chip.cc
@@ -275,36 +275,26 @@ BelId Chip::getPackagePinBel(const std::string &pin) const
 
 // -----------------------------------------------------------------------
 
-PosInfo Chip::getBelPosition(BelId bel) const
+bool Chip::estimatePosition(BelId bel, float &x, float &y) const
 {
-    PosInfo pos;
     assert(bel != BelId());
-    pos.x = chip_info.bel_data[bel.index].x;
-    pos.y = chip_info.bel_data[bel.index].y;
-    return pos;
-}
+    x = chip_info.bel_data[bel.index].x;
+    y = chip_info.bel_data[bel.index].y;
 
-PosInfo Chip::getWirePosition(WireId wire) const
-{
-    PosInfo pos;
-    assert(wire != WireId());
-    pos.x = chip_info.wire_data[wire.index].x;
-    pos.y = chip_info.wire_data[wire.index].y;
-    return pos;
+    return chip_info.bel_data[bel.index].type != TYPE_SB_GB;
 }
 
-PosInfo Chip::getPipPosition(PipId pip) const
+float Chip::estimateDelay(WireId src, WireId dst) const
 {
-    PosInfo pos;
-    assert(pip != PipId());
-    pos.x = chip_info.pip_data[pip.index].x;
-    pos.y = chip_info.pip_data[pip.index].y;
-    return pos;
-}
+    assert(src != WireId());
+    float x1 = chip_info.wire_data[src.index].x;
+    float y1 = chip_info.wire_data[src.index].y;
 
-float Chip::estimateDelay(PosInfo src, PosInfo dst) const
-{
-    return fabsf(src.x - dst.x) + fabsf(src.y - dst.y);
+    assert(dst != WireId());
+    float x2 = chip_info.wire_data[dst.index].x;
+    float y2 = chip_info.wire_data[dst.index].y;
+
+    return fabsf(x1 - x2) + fabsf(y1 - y2);
 }
 
 // -----------------------------------------------------------------------
diff --git a/ice40/chip.h b/ice40/chip.h
index 6700666f..54e8e368 100644
--- a/ice40/chip.h
+++ b/ice40/chip.h
@@ -42,11 +42,6 @@ struct DelayInfo
     }
 };
 
-struct PosInfo
-{
-    float x = 0, y = 0;
-};
-
 // -----------------------------------------------------------------------
 
 enum BelType
@@ -693,10 +688,8 @@ struct Chip
 
     // -------------------------------------------------
 
-    PosInfo getBelPosition(BelId bel) const;
-    PosInfo getWirePosition(WireId wire) const;
-    PosInfo getPipPosition(PipId pip) const;
-    float estimateDelay(PosInfo src, PosInfo dst) const;
+    bool estimatePosition(BelId bel, float &x, float &y) const;
+    float estimateDelay(WireId src, WireId dst) const;
 
     // -------------------------------------------------
 
diff --git a/ice40/pybindings.cc b/ice40/pybindings.cc
index 9094fe7c..5ccf9495 100644
--- a/ice40/pybindings.cc
+++ b/ice40/pybindings.cc
@@ -73,8 +73,8 @@ void arch_wrap_python()
             .def("getPipsDownhill", &Chip::getPipsDownhill)
             .def("getPipsUphill", &Chip::getPipsUphill)
             .def("getWireAliases", &Chip::getWireAliases)
-            .def("getBelPosition", &Chip::getBelPosition)
-            .def("getWirePosition", &Chip::getWirePosition);
+            .def("estimatePosition", &Chip::estimatePosition)
+            .def("estimateDelay", &Chip::estimateDelay);
 
     WRAP_RANGE(Bel);
     WRAP_RANGE(BelPin);
-- 
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