From aafe1a176c821a3919e773b57ac08fb348c91597 Mon Sep 17 00:00:00 2001
From: Maciej Kurc <mkurc@antmicro.com>
Date: Thu, 28 Apr 2022 17:18:26 +0200
Subject: Generalized representation of unused LUT pins connections

Signed-off-by: Maciej Kurc <mkurc@antmicro.com>
---
 fpga_interchange/luts.h | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'fpga_interchange/luts.h')

diff --git a/fpga_interchange/luts.h b/fpga_interchange/luts.h
index 8f33507a..892f457c 100644
--- a/fpga_interchange/luts.h
+++ b/fpga_interchange/luts.h
@@ -42,11 +42,22 @@ enum LogicLevel
 
 struct LutCell
 {
+    enum class PinConnection
+    {
+        Unconnected,
+        Gnd,
+        Vcc,
+        Const,
+        Signal
+    };
+
     // LUT cell pins for equation, LSB first.
     std::vector<IdString> pins;
     pool<IdString> lut_pins;
-    pool<IdString> vcc_pins;
+    dict<IdString, PinConnection> pin_connections;
     DynamicBitarray<> equation;
+
+    static const std::string nameOfPinConnection(PinConnection conn);
 };
 
 struct LutBel
-- 
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