/*

 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.

 * Copyright 2012, 2014 SAP AG. 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

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 */

#ifndef CPU_PPC_VM_VM_VERSION_PPC_HPP

#define CPU_PPC_VM_VM_VERSION_PPC_HPP

#include "runtime/globals_extension.hpp"

#include "runtime/vm_version.hpp"

class VM_Version: public Abstract_VM_Version {

protected:

  enum Feature_Flag {

    fsqrt,

    fsqrts,

    isel,

    lxarxeh,

    cmpb,

    popcntb,

    popcntw,

    fcfids,

    vand,

    dcba,

    num_features // last entry to count features

  };

  enum Feature_Flag_Set {

    unknown_m             = 0,

    fsqrt_m               = (1 << fsqrt  ),

    fsqrts_m              = (1 << fsqrts ),

    isel_m                = (1 << isel   ),

    lxarxeh_m             = (1 << lxarxeh),

    cmpb_m                = (1 << cmpb   ),

    popcntb_m             = (1 << popcntb),

    popcntw_m             = (1 << popcntw),

    fcfids_m              = (1 << fcfids ),

    vand_m                = (1 << vand   ),

    dcba_m                = (1 << dcba   ),

    all_features_m        = -1

  };

  static int  _features;

  static int  _measured_cache_line_size;

  static const char* _features_str;

  static bool _is_determine_features_test_running;

  static void print_features();

  static void determine_features(); // also measures cache line size

  static void determine_section_size();

  static void power6_micro_bench();

public:

  // Initialization

  static void initialize();

  static bool is_determine_features_test_running() { return _is_determine_features_test_running; }

  // CPU instruction support

  static bool has_fsqrt()   { return (_features & fsqrt_m) != 0; }

  static bool has_fsqrts()  { return (_features & fsqrts_m) != 0; }

  static bool has_isel()    { return (_features & isel_m) != 0; }

  static bool has_lxarxeh() { return (_features & lxarxeh_m) !=0; }

  static bool has_cmpb()    { return (_features & cmpb_m) != 0; }

  static bool has_popcntb() { return (_features & popcntb_m) != 0; }

  static bool has_popcntw() { return (_features & popcntw_m) != 0; }

  static bool has_fcfids()  { return (_features & fcfids_m) != 0; }

  static bool has_vand()    { return (_features & vand_m) != 0; }

  static bool has_dcba()    { return (_features & dcba_m) != 0; }

  static const char* cpu_features() { return _features_str; }

  static int get_cache_line_size()  { return _measured_cache_line_size; }

  // Assembler testing

  static void allow_all();

  static void revert();

};

#endif // CPU_PPC_VM_VM_VERSION_PPC_HPP