annotate src/cpu/ppc/vm/vm_version_ppc.hpp @ 14440:41b780b43b74

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
author goetz
date Wed, 27 Nov 2013 16:16:21 -0800
parents ec28f9c041ff
children 71a71b0bc844
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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, 2013 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 isel,
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37 lxarxeh,
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38 cmpb,
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39 popcntb,
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40 popcntw,
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41 fcfids,
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42 vand,
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43 dcba,
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44 num_features // last entry to count features
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45 };
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46 enum Feature_Flag_Set {
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47 unknown_m = 0,
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48 fsqrt_m = (1 << fsqrt ),
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49 isel_m = (1 << isel ),
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50 lxarxeh_m = (1 << lxarxeh),
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51 cmpb_m = (1 << cmpb ),
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52 popcntb_m = (1 << popcntb),
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53 popcntw_m = (1 << popcntw),
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54 fcfids_m = (1 << fcfids ),
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55 vand_m = (1 << vand ),
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56 dcba_m = (1 << dcba ),
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57 all_features_m = -1
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58 };
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59 static int _features;
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60 static int _measured_cache_line_size;
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61 static const char* _features_str;
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62 static bool _is_determine_features_test_running;
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63
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64 static void print_features();
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65 static void determine_features(); // also measures cache line size
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66 static void determine_section_size();
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67 static void power6_micro_bench();
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68 public:
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69 // Initialization
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70 static void initialize();
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71
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72 static bool is_determine_features_test_running() { return _is_determine_features_test_running; }
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73 // CPU instruction support
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74 static bool has_fsqrt() { return (_features & fsqrt_m) != 0; }
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75 static bool has_isel() { return (_features & isel_m) != 0; }
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76 static bool has_lxarxeh() { return (_features & lxarxeh_m) !=0; }
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77 static bool has_cmpb() { return (_features & cmpb_m) != 0; }
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78 static bool has_popcntb() { return (_features & popcntb_m) != 0; }
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79 static bool has_popcntw() { return (_features & popcntw_m) != 0; }
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80 static bool has_fcfids() { return (_features & fcfids_m) != 0; }
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81 static bool has_vand() { return (_features & vand_m) != 0; }
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82 static bool has_dcba() { return (_features & dcba_m) != 0; }
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83
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84 static const char* cpu_features() { return _features_str; }
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85
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86 static int get_cache_line_size() { return _measured_cache_line_size; }
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87
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88 // Assembler testing
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89 static void allow_all();
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90 static void revert();
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91 };
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92
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93 #endif // CPU_PPC_VM_VM_VERSION_PPC_HPP