--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/arm/vm_version_arm.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,128 @@
+/*
+ * 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_VM_VERSION_ARM_HPP
+#define CPU_ARM_VM_VM_VERSION_ARM_HPP
+
+#include "runtime/globals_extension.hpp"
+#include "runtime/vm_version.hpp"
+
+class VM_Version: public Abstract_VM_Version {
+  friend class JVMCIVMStructs;
+
+  static bool _has_simd;
+
+ protected:
+  // Are we done with vm version initialization
+  static bool _is_initialized;
+
+ public:
+  static void initialize();
+  static bool is_initialized()      { return _is_initialized; }
+
+#ifdef AARCH64
+
+ public:
+  static bool supports_ldrex()         { return true; }
+  static bool supports_ldrexd()        { return true; }
+  static bool supports_movw()          { return true; }
+
+  // Override Abstract_VM_Version implementation
+  static bool use_biased_locking();
+
+  static bool has_simd()               { return _has_simd; }
+  static bool has_vfp()                { return has_simd(); }
+  static bool simd_math_is_compliant() { return true; }
+
+  static bool prefer_moves_over_load_literal() { return true; }
+
+#else
+
+ protected:
+  enum Feature_Flag {
+    vfp = 0,
+    vfp3_32 = 1,
+    simd = 2,
+  };
+
+  enum Feature_Flag_Set {
+    unknown_m           = 0,
+    all_features_m      = -1,
+
+    vfp_m     = 1 << vfp,
+    vfp3_32_m = 1 << vfp3_32,
+    simd_m    = 1 << simd,
+  };
+
+  // The value stored by "STR PC, [addr]" instruction can be either
+  // (address of this instruction + 8) or (address of this instruction + 12)
+  // depending on hardware implementation.
+  // This adjustment is calculated in runtime.
+  static int _stored_pc_adjustment;
+
+  // ARM architecture version: 5 = ARMv5, 6 = ARMv6, 7 = ARMv7 etc.
+  static int _arm_arch;
+
+  // linux kernel atomic helper function version info
+  // __kuser_cmpxchg() if version >= 2
+  // __kuser_cmpxchg64() if version >= 5
+  static int _kuser_helper_version;
+
+#define KUSER_HELPER_VERSION_ADDR 0xffff0ffc
+#define KUSER_VERSION_CMPXCHG32 2
+#define KUSER_VERSION_CMPXCHG64 5
+
+  // Read additional info using OS-specific interfaces
+  static void get_os_cpu_info();
+
+ public:
+  static void early_initialize();
+
+  static int arm_arch()             { return _arm_arch; }
+  static int stored_pc_adjustment() { return _stored_pc_adjustment; }
+  static bool supports_rev()        { return _arm_arch >= 6; }
+  static bool supports_ldrex()      { return _arm_arch >= 6; }
+  static bool supports_movw()       { return _arm_arch >= 7; }
+  static bool supports_ldrexd()     { return _arm_arch >= 7; }
+  static bool supports_compare_and_exchange() { return true; }
+  static bool supports_kuser_cmpxchg32() { return _kuser_helper_version >= KUSER_VERSION_CMPXCHG32; }
+  static bool supports_kuser_cmpxchg64() { return _kuser_helper_version >= KUSER_VERSION_CMPXCHG64; }
+  // Override Abstract_VM_Version implementation
+  static bool use_biased_locking();
+  static const char* vm_info_string();
+
+  static bool has_vfp()             { return (_features & vfp_m) != 0; }
+  static bool has_vfp3_32()         { return (_features & vfp3_32_m) != 0; }
+  static bool has_simd()            { return (_features & simd_m) != 0; }
+
+  static bool simd_math_is_compliant() { return false; }
+
+  static bool prefer_moves_over_load_literal() { return supports_movw(); }
+
+  friend class VM_Version_StubGenerator;
+
+#endif // AARCH64
+};
+
+#endif // CPU_ARM_VM_VM_VERSION_ARM_HPP