1 /*
   2  * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012, 2016 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
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  24  */
  25 
  26 #ifndef CPU_PPC_VM_VM_VERSION_PPC_HPP
  27 #define CPU_PPC_VM_VM_VERSION_PPC_HPP
  28 
  29 #include "runtime/globals_extension.hpp"
  30 #include "runtime/vm_version.hpp"
  31 
  32 class VM_Version: public Abstract_VM_Version {
  33 protected:
  34   enum Feature_Flag {
  35     fsqrt,
  36     fsqrts,
  37     isel,
  38     lxarxeh,
  39     cmpb,
  40     popcntb,
  41     popcntw,
  42     fcfids,
  43     vand,
  44     lqarx,
  45     vcipher,
  46     vpmsumb,
  47     tcheck,
  48     mfdscr,
  49     vsx,
  50     num_features // last entry to count features
  51   };
  52   enum Feature_Flag_Set {
  53     unknown_m             = 0,
  54     fsqrt_m               = (1 << fsqrt  ),
  55     fsqrts_m              = (1 << fsqrts ),
  56     isel_m                = (1 << isel   ),
  57     lxarxeh_m             = (1 << lxarxeh),
  58     cmpb_m                = (1 << cmpb   ),
  59     popcntb_m             = (1 << popcntb),
  60     popcntw_m             = (1 << popcntw),
  61     fcfids_m              = (1 << fcfids ),
  62     vand_m                = (1 << vand   ),
  63     lqarx_m               = (1 << lqarx  ),
  64     vcipher_m             = (1 << vcipher),
  65     vpmsumb_m             = (1 << vpmsumb),
  66     tcheck_m              = (1 << tcheck ),
  67     mfdscr_m              = (1 << mfdscr ),
  68     vsx_m                 = (1 << vsx    ),
  69     all_features_m        = (unsigned long)-1
  70   };
  71 
  72   static bool _is_determine_features_test_running;
  73 
  74   static void print_features();
  75   static void determine_features(); // also measures cache line size
  76   static void config_dscr(); // Power 8: Configure Data Stream Control Register.
  77   static void determine_section_size();
  78   static void power6_micro_bench();
  79 public:
  80   // Initialization
  81   static void initialize();
  82 
  83   // Override Abstract_VM_Version implementation
  84   static bool use_biased_locking();
  85 
  86   static bool is_determine_features_test_running() { return _is_determine_features_test_running; }
  87   // CPU instruction support
  88   static bool has_fsqrt()   { return (_features & fsqrt_m) != 0; }
  89   static bool has_fsqrts()  { return (_features & fsqrts_m) != 0; }
  90   static bool has_isel()    { return (_features & isel_m) != 0; }
  91   static bool has_lxarxeh() { return (_features & lxarxeh_m) !=0; }
  92   static bool has_cmpb()    { return (_features & cmpb_m) != 0; }
  93   static bool has_popcntb() { return (_features & popcntb_m) != 0; }
  94   static bool has_popcntw() { return (_features & popcntw_m) != 0; }
  95   static bool has_fcfids()  { return (_features & fcfids_m) != 0; }
  96   static bool has_vand()    { return (_features & vand_m) != 0; }
  97   static bool has_lqarx()   { return (_features & lqarx_m) != 0; }
  98   static bool has_vcipher() { return (_features & vcipher_m) != 0; }
  99   static bool has_vpmsumb() { return (_features & vpmsumb_m) != 0; }
 100   static bool has_tcheck()  { return (_features & tcheck_m) != 0; }
 101   static bool has_mfdscr()  { return (_features & mfdscr_m) != 0; }
 102   static bool has_vsx()     { return (_features & vsx_m) != 0; }
 103   static bool has_mtfprd()  { return has_vpmsumb(); } // alias for P8
 104 
 105   // Assembler testing
 106   static void allow_all();
 107   static void revert();
 108 
 109   // POWER 8: DSCR current value.
 110   static uint64_t _dscr_val;
 111 };
 112 
 113 #endif // CPU_PPC_VM_VM_VERSION_PPC_HPP