--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/x86/vmreg_x86.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2006, 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.
+ *
+ */
+
+#ifndef CPU_X86_VM_VMREG_X86_HPP
+#define CPU_X86_VM_VMREG_X86_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 bool is_XMMRegister() {
+  int uarch_max_xmm = ConcreteRegisterImpl::max_xmm;
+
+#ifdef _LP64
+  if (UseAVX < 3) {
+    int half_xmm = (XMMRegisterImpl::max_slots_per_register * XMMRegisterImpl::number_of_registers) / 2;
+    uarch_max_xmm -= half_xmm;
+  }
+#endif
+
+  return (value() >= ConcreteRegisterImpl::max_fpr && value() < uarch_max_xmm);
+}
+
+inline bool is_KRegister() {
+  if (UseAVX > 2) {
+    return value() >= ConcreteRegisterImpl::max_xmm && value() < ConcreteRegisterImpl::max_kpr;
+  } else {
+    return false;
+  }
+}
+
+inline Register as_Register() {
+
+  assert( is_Register(), "must be");
+  // Yuk
+#ifdef AMD64
+  return ::as_Register(value() >> 1);
+#else
+  return ::as_Register(value());
+#endif // AMD64
+}
+
+inline FloatRegister as_FloatRegister() {
+  assert( is_FloatRegister() && is_even(value()), "must be" );
+  // Yuk
+  return ::as_FloatRegister((value() - ConcreteRegisterImpl::max_gpr) >> 1);
+}
+
+inline XMMRegister as_XMMRegister() {
+  assert( is_XMMRegister() && is_even(value()), "must be" );
+  // Yuk
+  return ::as_XMMRegister((value() - ConcreteRegisterImpl::max_fpr) >> 4);
+}
+
+inline KRegister as_KRegister() {
+  assert(is_KRegister(), "must be");
+  // Yuk
+  return ::as_KRegister((value() - ConcreteRegisterImpl::max_xmm));
+}
+
+inline   bool is_concrete() {
+  assert(is_reg(), "must be");
+#ifndef AMD64
+  if (is_Register()) return true;
+#endif // AMD64
+  return is_even(value());
+}
+
+#endif // CPU_X86_VM_VMREG_X86_HPP