/*

 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2012, 2016 SAP SE. 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.

 *

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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,

    lqarx,

    vcipher,

    vpmsumb,

    tcheck,

    mfdscr,

    vsx,

    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   ),

    lqarx_m               = (1 << lqarx  ),

    vcipher_m             = (1 << vcipher),

    vpmsumb_m             = (1 << vpmsumb),

    tcheck_m              = (1 << tcheck ),

    mfdscr_m              = (1 << mfdscr ),

    vsx_m                 = (1 << vsx    ),

    all_features_m        = (unsigned long)-1

  };

  static bool _is_determine_features_test_running;

  static void print_features();

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

  static void config_dscr(); // Power 8: Configure Data Stream Control Register.

  static void determine_section_size();

  static void power6_micro_bench();

public:

  // Initialization

  static void initialize();

  // Override Abstract_VM_Version implementation

  static bool use_biased_locking();

  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_lqarx()   { return (_features & lqarx_m) != 0; }

  static bool has_vcipher() { return (_features & vcipher_m) != 0; }

  static bool has_vpmsumb() { return (_features & vpmsumb_m) != 0; }

  static bool has_tcheck()  { return (_features & tcheck_m) != 0; }

  static bool has_mfdscr()  { return (_features & mfdscr_m) != 0; }

  static bool has_vsx()     { return (_features & vsx_m) != 0; }

  // Assembler testing

  static void allow_all();

  static void revert();

  // POWER 8: DSCR current value.

  static uint64_t _dscr_val;

};

#endif // CPU_PPC_VM_VM_VERSION_PPC_HPP