--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/arm/vmreg_arm.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2008, 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.
+ *
+ */
+
+#ifndef CPU_ARM_VM_VMREG_ARM_HPP
+#define CPU_ARM_VM_VMREG_ARM_HPP
+
+  inline bool is_Register() {
+    return (unsigned int) value() < (unsigned int) ConcreteRegisterImpl::max_gpr;
+  }
+
+  inline bool is_FloatRegister() {
+    return value() >= ConcreteRegisterImpl::max_gpr && value() < ConcreteRegisterImpl::max_fpr;
+  }
+
+  inline Register as_Register() {
+    assert(is_Register(), "must be");
+    assert(is_concrete(), "concrete register expected");
+    return ::as_Register(value() >> ConcreteRegisterImpl::log_vmregs_per_gpr);
+  }
+
+  inline FloatRegister as_FloatRegister() {
+    assert(is_FloatRegister(), "must be");
+    assert(is_concrete(), "concrete register expected");
+    return ::as_FloatRegister((value() - ConcreteRegisterImpl::max_gpr) >> ConcreteRegisterImpl::log_vmregs_per_fpr);
+  }
+
+  inline bool is_concrete() {
+    if (is_Register()) {
+      return ((value() & right_n_bits(ConcreteRegisterImpl::log_vmregs_per_gpr)) == 0);
+    } else if (is_FloatRegister()) {
+      return (((value() - ConcreteRegisterImpl::max_gpr) & right_n_bits(ConcreteRegisterImpl::log_vmregs_per_fpr)) == 0);
+    } else {
+      return false;
+    }
+  }
+
+#endif // CPU_ARM_VM_VMREG_ARM_HPP