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1 /* |
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2 * Copyright (c) 2002, 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_GLOBALS_PPC_HPP |
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27 #define CPU_PPC_VM_GLOBALS_PPC_HPP |
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28 |
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29 #include "utilities/globalDefinitions.hpp" |
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30 #include "utilities/macros.hpp" |
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31 |
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32 // Sets the default values for platform dependent flags used by the runtime system. |
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33 // (see globals.hpp) |
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34 |
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35 define_pd_global(bool, ConvertSleepToYield, true); |
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36 define_pd_global(bool, ShareVtableStubs, false); // Improves performance markedly for mtrt and compress. |
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37 define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this. |
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38 |
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39 |
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40 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks. |
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41 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. |
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42 |
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43 // Use large code-entry alignment. |
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44 define_pd_global(intx, CodeEntryAlignment, 128); |
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45 define_pd_global(intx, OptoLoopAlignment, 16); |
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46 define_pd_global(intx, InlineFrequencyCount, 100); |
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47 define_pd_global(intx, InlineSmallCode, 1500); |
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48 |
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49 define_pd_global(intx, PreInflateSpin, 10); |
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50 |
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51 // Flags for template interpreter. |
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52 define_pd_global(bool, RewriteBytecodes, true); |
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53 define_pd_global(bool, RewriteFrequentPairs, true); |
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54 |
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55 define_pd_global(bool, UseMembar, false); |
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56 |
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57 // GC Ergo Flags |
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58 define_pd_global(intx, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. |
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59 |
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60 |
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61 // Platform dependent flag handling: flags only defined on this platform. |
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62 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ |
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63 product(uintx, PowerArchitecturePPC64, 0, \ |
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64 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ |
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65 "Power7. Default is 0. CPUs newer than Power7 will be " \ |
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66 "recognized as Power7.") \ |
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67 \ |
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68 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ |
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69 /* indirect call by a direct call. */ \ |
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70 product(bool, ReoptimizeCallSequences, true, \ |
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71 "Reoptimize code-sequences of calls at runtime.") \ |
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72 \ |
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73 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ |
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74 "Use load instructions for stack banging.") \ |
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75 \ |
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76 /* special instructions */ \ |
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77 \ |
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78 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ |
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79 "Use count leading zeros instructions.") \ |
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80 \ |
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81 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ |
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82 "Use extended versions of load-and-reserve instructions.") \ |
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83 \ |
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84 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ |
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85 "Use rotate and mask instructions.") \ |
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86 \ |
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87 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ |
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88 "Use static branch prediction hints in CAS operations.") \ |
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89 \ |
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90 /* Trap based checks. */ \ |
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91 /* Trap based checks use the ppc trap instructions to check certain */ \ |
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92 /* conditions. This instruction raises a SIGTRAP caught by the */ \ |
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93 /* exception handler of the VM. */ \ |
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94 product(bool, UseSIGTRAP, false, \ |
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95 "Allow trap instructions that make use of SIGTRAP. Use this to " \ |
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96 "switch off all optimizations requiring SIGTRAP.") \ |
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97 product(bool, TrapBasedICMissChecks, true, \ |
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98 "Raise and handle SIGTRAP if inline cache miss detected.") \ |
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99 product(bool, TrapBasedNotEntrantChecks, true, \ |
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100 "Raise and handle SIGTRAP if calling not entrant or zombie" \ |
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101 " method.") \ |
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102 product(bool, TrapBasedNullChecks, true, \ |
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103 "Generate code for null checks that uses a cmp and trap " \ |
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104 "instruction raising SIGTRAP. This is only used if an access to" \ |
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105 "null (+offset) will not raise a SIGSEGV.") \ |
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106 product(bool, TrapBasedRangeChecks, true, \ |
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107 "Raise and handle SIGTRAP if array out of bounds check fails.") \ |
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108 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ |
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109 "handles.") \ |
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110 \ |
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111 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ |
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112 " Use this to ease debugging.") \ |
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113 |
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114 |
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115 |
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116 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP |