--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.graal.compiler/src/com/sun/c1x/globalstub/GlobalStub.java	Wed Jun 08 08:42:25 2011 +0200
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2009, 2010, 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.sun.c1x.globalstub;
+
+import static com.sun.cri.ci.CiKind.*;
+
+import com.sun.cri.ci.*;
+
+/**
+ * A global stub is a shared routine that performs an operation on behalf of compiled code.
+ * Typically the routine is too large to inline, is infrequent, or requires runtime support.
+ * Global stubs are called with a callee-save convention; the global stub must save any
+ * registers it may destroy and then restore them upon return. This allows the register
+ * allocator to ignore calls to global stubs. Parameters to global stubs are
+ * passed on the stack in order to preserve registers for the rest of the code.
+ *
+ * @author Thomas Wuerthinger
+ * @author Ben L. Titzer
+ */
+public class GlobalStub {
+
+    public enum Id {
+
+        fneg(Float, Float),
+        dneg(Double, Double),
+        f2i(Int, Float),
+        f2l(Long, Float),
+        d2i(Int, Double),
+        d2l(Long, Double);
+
+        public final CiKind resultKind;
+        public final CiKind[] arguments;
+
+        private Id(CiKind resultKind, CiKind... args) {
+            this.resultKind = resultKind;
+            this.arguments = args;
+        }
+    }
+
+    public final Id id;
+    public final CiKind resultKind;
+    public final Object stubObject;
+    public final int argsSize;
+    public final int[] argOffsets;
+    public final int resultOffset;
+
+    public GlobalStub(Id id, CiKind resultKind, Object stubObject, int argsSize, int[] argOffsets, int resultOffset) {
+        this.id = id;
+        this.resultKind = resultKind;
+        this.stubObject = stubObject;
+        this.argsSize = argsSize;
+        this.argOffsets = argOffsets;
+        this.resultOffset = resultOffset;
+    }
+
+}