1 /* 2 * Copyright (c) 2002, 2023, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2023 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. 23 * 24 */ 25 26 #ifndef CPU_PPC_GLOBALS_PPC_HPP 27 #define CPU_PPC_GLOBALS_PPC_HPP 28 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/macros.hpp" 31 32 // Sets the default values for platform dependent flags used by the runtime system. 33 // (see globals.hpp) 34 35 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks. 36 define_pd_global(bool, TrapBasedNullChecks, true); 37 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap nulls passed to check cast. 38 39 define_pd_global(bool, DelayCompilerStubsGeneration, COMPILER2_OR_JVMCI); 40 41 #define DEFAULT_STACK_YELLOW_PAGES (2) 42 #define DEFAULT_STACK_RED_PAGES (1) 43 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 44 // stack if compiled for unix and LP64. To pass stack overflow tests we need 45 // 20 shadow pages. 46 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 47 #define DEFAULT_STACK_RESERVED_PAGES (1) 48 49 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 50 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 51 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 52 #define MIN_STACK_RESERVED_PAGES (0) 53 54 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 55 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 56 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 57 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 58 59 define_pd_global(bool, VMContinuations, true); 60 61 // Use large code-entry alignment. 62 define_pd_global(uintx, CodeCacheSegmentSize, 128); 63 define_pd_global(intx, CodeEntryAlignment, 128); 64 define_pd_global(intx, OptoLoopAlignment, 16); 65 define_pd_global(intx, InlineSmallCode, 1500); 66 67 // Flags for template interpreter. 68 define_pd_global(bool, RewriteBytecodes, true); 69 define_pd_global(bool, RewriteFrequentPairs, true); 70 71 define_pd_global(bool, PreserveFramePointer, false); 72 73 define_pd_global(uintx, TypeProfileLevel, 111); 74 75 define_pd_global(bool, CompactStrings, true); 76 77 // 2x unrolled loop is shorter with more than 9 HeapWords. 78 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 79 80 // Platform dependent flag handling: flags only defined on this platform. 81 #define ARCH_FLAGS(develop, \ 82 product, \ 83 notproduct, \ 84 range, \ 85 constraint) \ 86 \ 87 product(uintx, PowerArchitecturePPC64, 0, DIAGNOSTIC, \ 88 "Specify the PowerPC family version in use. If not provided, " \ 89 "HotSpot will determine it automatically. Host family version " \ 90 "is the maximum value allowed (instructions are not emulated).") \ 91 \ 92 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 93 /* indirect call by a direct call. */ \ 94 product(bool, ReoptimizeCallSequences, true, DIAGNOSTIC, \ 95 "Reoptimize code-sequences of calls at runtime.") \ 96 \ 97 /* Power 8: Configure Data Stream Control Register. */ \ 98 product(uint64_t, DSCR_PPC64, (uint64_t)-1, \ 99 "Power8 or later: Specify encoded value for Data Stream Control " \ 100 "Register") \ 101 product(uint64_t, DSCR_DPFD_PPC64, 8, \ 102 "Power8 or later: DPFD (default prefetch depth) value of the " \ 103 "Data Stream Control Register." \ 104 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 105 product(uint64_t, DSCR_URG_PPC64, 8, \ 106 "Power8 or later: URG (depth attainment urgency) value of the " \ 107 "Data Stream Control Register." \ 108 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 109 \ 110 product(bool, UseLoadInstructionsForStackBangingPPC64, false, DIAGNOSTIC, \ 111 "Use load instructions for stack banging.") \ 112 \ 113 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, DIAGNOSTIC,\ 114 "Use static branch prediction hints in CAS operations.") \ 115 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, DIAGNOSTIC,\ 116 "Use static branch prediction hints for uncommon paths.") \ 117 \ 118 /* special instructions */ \ 119 product(bool, SuperwordUseVSX, false, \ 120 "Use Power8 VSX instructions for superword optimization.") \ 121 \ 122 product(bool, UseByteReverseInstructions, false, DIAGNOSTIC, \ 123 "Use byte reverse instructions.") \ 124 \ 125 product(bool, UseVectorByteReverseInstructionsPPC64, false, DIAGNOSTIC, \ 126 "Use Power9 xxbr* vector byte reverse instructions.") \ 127 \ 128 product(bool, UseCountLeadingZerosInstructionsPPC64, true, DIAGNOSTIC, \ 129 "Use count leading zeros instructions.") \ 130 \ 131 product(bool, UseCountTrailingZerosInstructionsPPC64, false, DIAGNOSTIC, \ 132 "Use count trailing zeros instructions.") \ 133 \ 134 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, DIAGNOSTIC,\ 135 "Use extended versions of load-and-reserve instructions.") \ 136 \ 137 product(bool, UseRotateAndMaskInstructionsPPC64, true, DIAGNOSTIC, \ 138 "Use rotate and mask instructions.") \ 139 \ 140 /* Trap based checks. */ \ 141 /* Trap based checks use the ppc trap instructions to check certain */ \ 142 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 143 /* exception handler of the VM. */ \ 144 product(bool, UseSIGTRAP, true, \ 145 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 146 "switch off all optimizations requiring SIGTRAP.") \ 147 product(bool, TrapBasedICMissChecks, true, DIAGNOSTIC, \ 148 "Raise and handle SIGTRAP if inline cache miss detected.") \ 149 \ 150 product(bool, TraceTraps, false, DIAGNOSTIC, \ 151 "Trace all traps the signal handler handles.") \ 152 \ 153 develop(bool, ZapMemory, false, \ 154 "Write 0x0101... to empty memory. Use this to ease debugging.") \ 155 \ 156 /* Use Restricted Transactional Memory for lock elision */ \ 157 product(bool, UseRTMLocking, false, \ 158 "Enable RTM lock eliding for inflated locks in compiled code") \ 159 \ 160 product(bool, UseRTMForStackLocks, false, EXPERIMENTAL, \ 161 "Enable RTM lock eliding for stack locks in compiled code") \ 162 \ 163 product(bool, UseRTMDeopt, false, \ 164 "Perform deopt and recompilation based on RTM abort ratio") \ 165 \ 166 product(int, RTMRetryCount, 5, \ 167 "Number of RTM retries on lock abort or busy") \ 168 range(0, max_jint) \ 169 \ 170 product(int, RTMSpinLoopCount, 100, EXPERIMENTAL, \ 171 "Spin count for lock to become free before RTM retry") \ 172 range(0, 32767) /* immediate operand limit on ppc */ \ 173 \ 174 product(int, RTMAbortThreshold, 1000, EXPERIMENTAL, \ 175 "Calculate abort ratio after this number of aborts") \ 176 range(0, max_jint) \ 177 \ 178 product(int, RTMLockingThreshold, 10000, EXPERIMENTAL, \ 179 "Lock count at which to do RTM lock eliding without " \ 180 "abort ratio calculation") \ 181 range(0, max_jint) \ 182 \ 183 product(int, RTMAbortRatio, 50, EXPERIMENTAL, \ 184 "Lock abort ratio at which to stop use RTM lock eliding") \ 185 range(0, 100) /* natural range */ \ 186 \ 187 product(int, RTMTotalCountIncrRate, 64, EXPERIMENTAL, \ 188 "Increment total RTM attempted lock count once every n times") \ 189 range(1, 32767) /* immediate operand limit on ppc */ \ 190 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 191 \ 192 product(intx, RTMLockingCalculationDelay, 0, EXPERIMENTAL, \ 193 "Number of milliseconds to wait before start calculating aborts " \ 194 "for RTM locking") \ 195 \ 196 product(bool, UseRTMXendForLockBusy, true, EXPERIMENTAL, \ 197 "Use RTM Xend instead of Xabort when lock busy") 198 199 // end of ARCH_FLAGS 200 201 #endif // CPU_PPC_GLOBALS_PPC_HPP --- EOF ---