jdk8-mips64-public/hotspot: src/cpu/ppc/vm/vm_version

8029015: PPC64 (part 216): opto: trap based null and range checks
Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.
Reviewed-by: kvn

     1 /*

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

     3  * Copyright 2012, 2013 SAP AG. 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.

    23  *

    24  */

    26 #ifndef CPU_PPC_VM_VM_VERSION_PPC_HPP

    27 #define CPU_PPC_VM_VM_VERSION_PPC_HPP

    29 #include "runtime/globals_extension.hpp"

    30 #include "runtime/vm_version.hpp"

    32 class VM_Version: public Abstract_VM_Version {

    33 protected:

    34   enum Feature_Flag {

    35     fsqrt,

    36     isel,

    37     lxarxeh,

    38     cmpb,

    39     popcntb,

    40     popcntw,

    41     fcfids,

    42     vand,

    43     dcba,

    44     num_features // last entry to count features

    45   };

    46   enum Feature_Flag_Set {

    47     unknown_m             = 0,

    48     fsqrt_m               = (1 << fsqrt  ),

    49     isel_m                = (1 << isel   ),

    50     lxarxeh_m             = (1 << lxarxeh),

    51     cmpb_m                = (1 << cmpb   ),

    52     popcntb_m             = (1 << popcntb),

    53     popcntw_m             = (1 << popcntw),

    54     fcfids_m              = (1 << fcfids ),

    55     vand_m                = (1 << vand   ),

    56     dcba_m                = (1 << dcba   ),

    57     all_features_m        = -1

    58   };

    59   static int  _features;

    60   static int  _measured_cache_line_size;

    61   static const char* _features_str;

    62   static bool _is_determine_features_test_running;

    64   static void print_features();

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

    66   static void determine_section_size();

    67   static void power6_micro_bench();

    68 public:

    69   // Initialization

    70   static void initialize();

    72   static bool is_determine_features_test_running() { return _is_determine_features_test_running; }

    73   // CPU instruction support

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

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

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

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

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

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

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

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

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

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

    86   static int get_cache_line_size()  { return _measured_cache_line_size; }

    88   // Assembler testing

    89   static void allow_all();

    90   static void revert();

    91 };

    93 #endif // CPU_PPC_VM_VM_VERSION_PPC_HPP

src/cpu/ppc/vm/vm_version_ppc.hpp@41b780b43b74

src/cpu/ppc/vm/vm_version_ppc.hpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/cpu/ppc/vm/vm_version_ppc.hpp@41b780b43b74

src/cpu/ppc/vm/vm_version_ppc.hpp