--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/objects/instancevariables/WriteFloatInstanceVariableNode.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes.objects.instancevariables;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.objects.*;
+
+@NodeInfo(shortName = "@Float=")
+public class WriteFloatInstanceVariableNode extends WriteSpecializedInstanceVariableNode {
+
+    private final FloatStorageLocation storageLocation;
+
+    public WriteFloatInstanceVariableNode(RubyContext context, SourceSection sourceSection, String name, RubyNode receiver, RubyNode rhs, ObjectLayout objectLayout,
+                    FloatStorageLocation storageLocation) {
+        super(context, sourceSection, name, receiver, rhs, objectLayout);
+        this.storageLocation = storageLocation;
+    }
+
+    @Override
+    public double executeFloat(VirtualFrame frame) throws UnexpectedResultException {
+        final RubyBasicObject receiverObject = (RubyBasicObject) receiver.execute(frame);
+
+        double value;
+
+        try {
+            value = rhs.executeFloat(frame);
+        } catch (UnexpectedResultException e) {
+            receiverObject.setInstanceVariable(name, e.getResult());
+            replace(respecialize(receiverObject));
+            throw e;
+        }
+
+        final ObjectLayout receiverLayout = receiverObject.getObjectLayout();
+
+        if (receiverLayout != objectLayout) {
+            CompilerDirectives.transferToInterpreter();
+            receiverObject.setInstanceVariable(name, value);
+            replace(respecialize(receiverObject));
+            return value;
+        }
+
+        assert receiverLayout != null;
+
+        storageLocation.writeFloat(receiverObject, value);
+        return value;
+    }
+
+    @Override
+    public Object execute(VirtualFrame frame) {
+        try {
+            return executeFloat(frame);
+        } catch (UnexpectedResultException e) {
+            return e.getResult();
+        }
+    }
+
+}