--- /dev/null	2017-11-16 08:17:56.803999947 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.amd64/src/org/graalvm/compiler/lir/amd64/AMD64HotSpotHelper.java	2019-03-12 08:10:45.352025048 +0100
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2018, 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 org.graalvm.compiler.lir.amd64;
+
+import org.graalvm.compiler.asm.amd64.AMD64Address;
+import org.graalvm.compiler.core.common.LIRKind;
+import org.graalvm.compiler.debug.GraalError;
+import org.graalvm.compiler.lir.asm.ArrayDataPointerConstant;
+import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
+
+import jdk.vm.ci.amd64.AMD64;
+import jdk.vm.ci.amd64.AMD64Kind;
+import jdk.vm.ci.code.Register;
+import jdk.vm.ci.meta.Value;
+
+public final class AMD64HotSpotHelper {
+
+    private AMD64HotSpotHelper() {
+    }
+
+    protected static Value[] registersToValues(Register[] registers) {
+        Value[] temps = new Value[registers.length];
+        for (int i = 0; i < registers.length; i++) {
+            Register register = registers[i];
+            if (AMD64.CPU.equals(register.getRegisterCategory())) {
+                temps[i] = register.asValue(LIRKind.value(AMD64Kind.QWORD));
+            } else if (AMD64.XMM.equals(register.getRegisterCategory())) {
+                temps[i] = register.asValue(LIRKind.value(AMD64Kind.DOUBLE));
+            } else {
+                throw GraalError.shouldNotReachHere("Unsupported register type in math stubs.");
+            }
+        }
+        return temps;
+    }
+
+    protected static AMD64Address recordExternalAddress(CompilationResultBuilder crb, ArrayDataPointerConstant ptr) {
+        return (AMD64Address) crb.recordDataReferenceInCode(ptr);
+    }
+
+    protected static ArrayDataPointerConstant pointerConstant(int alignment, int[] ints) {
+        return new ArrayDataPointerConstant(ints, alignment);
+    }
+}