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annotate src/cpu/ppc/vm/vm_version_ppc.hpp @ 20304:a22acf6d7598

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8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents 71a71b0bc844
children
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1 /*
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2012, 2014 SAP AG. All rights reserved.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #ifndef CPU_PPC_VM_VM_VERSION_PPC_HPP
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27 #define CPU_PPC_VM_VM_VERSION_PPC_HPP
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28
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29 #include "runtime/globals_extension.hpp"
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30 #include "runtime/vm_version.hpp"
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31
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32 class VM_Version: public Abstract_VM_Version {
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33 protected:
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34 enum Feature_Flag {
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35 fsqrt,
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36 fsqrts,
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37 isel,
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38 lxarxeh,
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39 cmpb,
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40 popcntb,
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41 popcntw,
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42 fcfids,
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43 vand,
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44 dcba,
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45 num_features // last entry to count features
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46 };
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47 enum Feature_Flag_Set {
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48 unknown_m = 0,
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49 fsqrt_m = (1 << fsqrt ),
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50 fsqrts_m = (1 << fsqrts ),
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51 isel_m = (1 << isel ),
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52 lxarxeh_m = (1 << lxarxeh),
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53 cmpb_m = (1 << cmpb ),
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54 popcntb_m = (1 << popcntb),
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55 popcntw_m = (1 << popcntw),
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56 fcfids_m = (1 << fcfids ),
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57 vand_m = (1 << vand ),
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58 dcba_m = (1 << dcba ),
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59 all_features_m = -1
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60 };
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61 static int _features;
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62 static int _measured_cache_line_size;
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63 static const char* _features_str;
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64 static bool _is_determine_features_test_running;
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65
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66 static void print_features();
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67 static void determine_features(); // also measures cache line size
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68 static void determine_section_size();
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69 static void power6_micro_bench();
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70 public:
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71 // Initialization
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72 static void initialize();
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73
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74 static bool is_determine_features_test_running() { return _is_determine_features_test_running; }
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75 // CPU instruction support
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76 static bool has_fsqrt() { return (_features & fsqrt_m) != 0; }
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77 static bool has_fsqrts() { return (_features & fsqrts_m) != 0; }
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78 static bool has_isel() { return (_features & isel_m) != 0; }
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79 static bool has_lxarxeh() { return (_features & lxarxeh_m) !=0; }
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80 static bool has_cmpb() { return (_features & cmpb_m) != 0; }
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81 static bool has_popcntb() { return (_features & popcntb_m) != 0; }
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82 static bool has_popcntw() { return (_features & popcntw_m) != 0; }
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83 static bool has_fcfids() { return (_features & fcfids_m) != 0; }
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84 static bool has_vand() { return (_features & vand_m) != 0; }
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85 static bool has_dcba() { return (_features & dcba_m) != 0; }
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86
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87 static const char* cpu_features() { return _features_str; }
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88
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89 static int get_cache_line_size() { return _measured_cache_line_size; }
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90
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91 // Assembler testing
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92 static void allow_all();
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93 static void revert();
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94 };
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95
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96 #endif // CPU_PPC_VM_VM_VERSION_PPC_HPP