From a3a609178c0f6b9886a8b1e4d723f0525cb30e80 Mon Sep 17 00:00:00 2001
From: hneemann <helmut.neemann@arcor.de>
Date: Sat, 4 Mar 2017 17:29:12 +0100
Subject: [PATCH] fixed a bug witch result in values always zero if 64 bit
 values are used.

---
 .../neemann/digital/core/ObservableValue.java |  5 +++-
 .../digital/core/ObservableValueTest.java     | 28 +++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 src/test/java/de/neemann/digital/core/ObservableValueTest.java

diff --git a/src/main/java/de/neemann/digital/core/ObservableValue.java b/src/main/java/de/neemann/digital/core/ObservableValue.java
index 336dd7971..56cb85336 100644
--- a/src/main/java/de/neemann/digital/core/ObservableValue.java
+++ b/src/main/java/de/neemann/digital/core/ObservableValue.java
@@ -39,7 +39,10 @@ public class ObservableValue extends Observable implements PinDescription {
         super();
         this.bits = bits;
         this.highZ = highZ;
-        mask = (1L << bits) - 1;
+        if (bits > 63)
+            mask = -1;
+        else
+            mask = (1L << bits) - 1;
         this.name = name;
         supportsHighZ = highZ;
     }
diff --git a/src/test/java/de/neemann/digital/core/ObservableValueTest.java b/src/test/java/de/neemann/digital/core/ObservableValueTest.java
new file mode 100644
index 000000000..8b5f53d10
--- /dev/null
+++ b/src/test/java/de/neemann/digital/core/ObservableValueTest.java
@@ -0,0 +1,28 @@
+package de.neemann.digital.core;
+
+import junit.framework.TestCase;
+
+/**
+ * Created by hneemann on 04.03.17.
+ */
+public class ObservableValueTest extends TestCase {
+
+    public void testSetValue1() throws Exception {
+        ObservableValue v = new ObservableValue("z", 64);
+        v.setValue(5);
+        assertEquals(5, v.getValue());
+    }
+
+    public void testSetValue2() throws Exception {
+        ObservableValue v = new ObservableValue("z", 63);
+        v.setValue(-1);
+        assertEquals((1l << 63) - 1, v.getValue());
+    }
+
+    public void testSetValue3() throws Exception {
+        ObservableValue v = new ObservableValue("z", 62);
+        v.setValue(-1);
+        assertEquals((1l << 62) - 1, v.getValue());
+    }
+
+}
\ No newline at end of file