1 /* 2 * Copyright (c) 2002, 2020, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2020 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 DEFAULT_STACK_YELLOW_PAGES (2) 40 #define DEFAULT_STACK_RED_PAGES (1) 41 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 42 // stack if compiled for unix and LP64. To pass stack overflow tests we need 43 // 20 shadow pages. 44 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 45 #define DEFAULT_STACK_RESERVED_PAGES (1) 46 47 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 48 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 49 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 50 #define MIN_STACK_RESERVED_PAGES (0) 51 52 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 53 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 54 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 55 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 56 57 // Use large code-entry alignment. 58 define_pd_global(uintx, CodeCacheSegmentSize, 128); 59 define_pd_global(intx, CodeEntryAlignment, 128); 60 define_pd_global(intx, OptoLoopAlignment, 16); 61 define_pd_global(intx, InlineSmallCode, 1500); 62 63 // Flags for template interpreter. 64 define_pd_global(bool, RewriteBytecodes, true); 65 define_pd_global(bool, RewriteFrequentPairs, true); 66 67 define_pd_global(bool, PreserveFramePointer, false); 68 69 define_pd_global(uintx, TypeProfileLevel, 111); 70 71 define_pd_global(bool, CompactStrings, true); 72 73 // 2x unrolled loop is shorter with more than 9 HeapWords. 74 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 75 76 // Platform dependent flag handling: flags only defined on this platform. 77 #define ARCH_FLAGS(develop, \ 78 product, \ 79 notproduct, \ 80 range, \ 81 constraint) \ 82 \ 83 product(uintx, PowerArchitecturePPC64, 0, DIAGNOSTIC, \ 84 "Specify the PowerPC family version in use. If not provided, " \ 85 "HotSpot will determine it automatically. Host family version " \ 86 "is the maximum value allowed (instructions are not emulated).") \ 87 \ 88 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 89 /* indirect call by a direct call. */ \ 90 product(bool, ReoptimizeCallSequences, true, DIAGNOSTIC, \ 91 "Reoptimize code-sequences of calls at runtime.") \ 92 \ 93 /* Power 8: Configure Data Stream Control Register. */ \ 94 product(uint64_t, DSCR_PPC64, (uint64_t)-1, \ 95 "Power8 or later: Specify encoded value for Data Stream Control " \ 96 "Register") \ 97 product(uint64_t, DSCR_DPFD_PPC64, 8, \ 98 "Power8 or later: DPFD (default prefetch depth) value of the " \ 99 "Data Stream Control Register." \ 100 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 101 product(uint64_t, DSCR_URG_PPC64, 8, \ 102 "Power8 or later: URG (depth attainment urgency) value of the " \ 103 "Data Stream Control Register." \ 104 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 105 \ 106 product(bool, UseLoadInstructionsForStackBangingPPC64, false, DIAGNOSTIC, \ 107 "Use load instructions for stack banging.") \ 108 \ 109 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, DIAGNOSTIC,\ 110 "Use static branch prediction hints in CAS operations.") \ 111 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, DIAGNOSTIC,\ 112 "Use static branch prediction hints for uncommon paths.") \ 113 \ 114 /* special instructions */ \ 115 product(bool, SuperwordUseVSX, false, \ 116 "Use Power8 VSX instructions for superword optimization.") \ 117 \ 118 product(bool, UseByteReverseInstructions, false, DIAGNOSTIC, \ 119 "Use byte reverse instructions.") \ 120 \ 121 product(bool, UseVectorByteReverseInstructionsPPC64, false, DIAGNOSTIC, \ 122 "Use Power9 xxbr* vector byte reverse instructions.") \ 123 \ 124 product(bool, UseCountLeadingZerosInstructionsPPC64, true, DIAGNOSTIC, \ 125 "Use count leading zeros instructions.") \ 126 \ 127 product(bool, UseCountTrailingZerosInstructionsPPC64, false, DIAGNOSTIC, \ 128 "Use count trailing zeros instructions.") \ 129 \ 130 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, DIAGNOSTIC,\ 131 "Use extended versions of load-and-reserve instructions.") \ 132 \ 133 product(bool, UseRotateAndMaskInstructionsPPC64, true, DIAGNOSTIC, \ 134 "Use rotate and mask instructions.") \ 135 \ 136 /* Trap based checks. */ \ 137 /* Trap based checks use the ppc trap instructions to check certain */ \ 138 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 139 /* exception handler of the VM. */ \ 140 product(bool, UseSIGTRAP, true, \ 141 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 142 "switch off all optimizations requiring SIGTRAP.") \ 143 product(bool, TrapBasedICMissChecks, true, DIAGNOSTIC, \ 144 "Raise and handle SIGTRAP if inline cache miss detected.") \ 145 \ 146 product(bool, TraceTraps, false, DIAGNOSTIC, \ 147 "Trace all traps the signal handler handles.") \ 148 \ 149 develop(bool, ZapMemory, false, \ 150 "Write 0x0101... to empty memory. Use this to ease debugging.") \ 151 \ 152 /* Use Restricted Transactional Memory for lock elision */ \ 153 product(bool, UseRTMLocking, false, \ 154 "Enable RTM lock eliding for inflated locks in compiled code") \ 155 \ 156 product(bool, UseRTMForStackLocks, false, EXPERIMENTAL, \ 157 "Enable RTM lock eliding for stack locks in compiled code") \ 158 \ 159 product(bool, UseRTMDeopt, false, \ 160 "Perform deopt and recompilation based on RTM abort ratio") \ 161 \ 162 product(int, RTMRetryCount, 5, \ 163 "Number of RTM retries on lock abort or busy") \ 164 range(0, max_jint) \ 165 \ 166 product(int, RTMSpinLoopCount, 100, EXPERIMENTAL, \ 167 "Spin count for lock to become free before RTM retry") \ 168 range(0, 32767) /* immediate operand limit on ppc */ \ 169 \ 170 product(int, RTMAbortThreshold, 1000, EXPERIMENTAL, \ 171 "Calculate abort ratio after this number of aborts") \ 172 range(0, max_jint) \ 173 \ 174 product(int, RTMLockingThreshold, 10000, EXPERIMENTAL, \ 175 "Lock count at which to do RTM lock eliding without " \ 176 "abort ratio calculation") \ 177 range(0, max_jint) \ 178 \ 179 product(int, RTMAbortRatio, 50, EXPERIMENTAL, \ 180 "Lock abort ratio at which to stop use RTM lock eliding") \ 181 range(0, 100) /* natural range */ \ 182 \ 183 product(int, RTMTotalCountIncrRate, 64, EXPERIMENTAL, \ 184 "Increment total RTM attempted lock count once every n times") \ 185 range(1, 32767) /* immediate operand limit on ppc */ \ 186 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 187 \ 188 product(intx, RTMLockingCalculationDelay, 0, EXPERIMENTAL, \ 189 "Number of milliseconds to wait before start calculating aborts " \ 190 "for RTM locking") \ 191 \ 192 product(bool, UseRTMXendForLockBusy, true, EXPERIMENTAL, \ 193 "Use RTM Xend instead of Xabort when lock busy") 194 195 // end of ARCH_FLAGS 196 197 #endif // CPU_PPC_GLOBALS_PPC_HPP