--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLFunctionForeignAccess.java	Tue May 26 19:11:36 2015 +0200
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.sl.runtime;
+
+import com.oracle.truffle.api.CallTarget;
+import com.oracle.truffle.api.Truffle;
+import com.oracle.truffle.api.frame.VirtualFrame;
+import com.oracle.truffle.api.interop.ForeignAccessFactory;
+import com.oracle.truffle.api.interop.InteropPredicate;
+import com.oracle.truffle.api.interop.exception.UnsupportedMessageException;
+import com.oracle.truffle.api.interop.messages.Message;
+import com.oracle.truffle.api.nodes.RootNode;
+import com.oracle.truffle.interop.ForeignAccessArguments;
+import com.oracle.truffle.interop.messages.Execute;
+import com.oracle.truffle.interop.messages.Receiver;
+import com.oracle.truffle.sl.nodes.call.SLDispatchNode;
+import com.oracle.truffle.sl.nodes.call.SLDispatchNodeGen;
+import java.math.BigInteger;
+
+/**
+ * Implementation of foreing access for {@link SLFunction}.
+ */
+final class SLFunctionForeignAccess implements ForeignAccessFactory {
+    public static final ForeignAccessFactory INSTANCE = new SLFunctionForeignAccess();
+
+    private SLFunctionForeignAccess() {
+    }
+
+    @Override
+    public InteropPredicate getLanguageCheck() {
+        return (com.oracle.truffle.api.interop.TruffleObject o) -> o instanceof SLFunction;
+    }
+
+    @Override
+    public CallTarget getAccess(Message tree) {
+        if (Execute.create(Receiver.create(), 0).matchStructure(tree)) {
+            return Truffle.getRuntime().createCallTarget(new SLForeignCallerRootNode());
+        } else {
+            throw new UnsupportedMessageException(tree.toString() + " not supported");
+        }
+    }
+
+    private static class SLForeignCallerRootNode extends RootNode {
+        @Child private SLDispatchNode dispatch = SLDispatchNodeGen.create();
+
+        @Override
+        public Object execute(VirtualFrame frame) {
+            SLFunction function = (SLFunction) ForeignAccessArguments.getReceiver(frame.getArguments());
+            // the calling convention of interop passes the receiver of a
+            // function call (the this object)
+            // as an implicit 1st argument; we need to ignore this argument for SL
+            Object[] arguments = ForeignAccessArguments.extractUserArguments(1, frame.getArguments());
+            for (int i = 0; i < arguments.length; i++) {
+                if (arguments[i] instanceof Long) {
+                    continue;
+                }
+                if (arguments[i] instanceof BigInteger) {
+                    continue;
+                }
+                if (arguments[i] instanceof Number) {
+                    arguments[i] = ((Number) arguments[i]).longValue();
+                }
+            }
+
+            return dispatch.executeDispatch(frame, function, arguments);
+        }
+
+    }
+
+}