1 /* 2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2015, Red Hat Inc. 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_AARCH64_GLOBALS_AARCH64_HPP 27 #define CPU_AARCH64_GLOBALS_AARCH64_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, ShareVtableStubs, true); 36 37 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 38 define_pd_global(bool, TrapBasedNullChecks, false); 39 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast 40 41 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment. 42 define_pd_global(intx, CodeEntryAlignment, 64); 43 define_pd_global(intx, OptoLoopAlignment, 16); 44 define_pd_global(intx, InlineFrequencyCount, 100); 45 46 #define DEFAULT_STACK_YELLOW_PAGES (2) 47 #define DEFAULT_STACK_RED_PAGES (1) 48 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 49 // stack if compiled for unix and LP64. To pass stack overflow tests we need 50 // 20 shadow pages. 51 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5)) 52 #define DEFAULT_STACK_RESERVED_PAGES (1) 53 54 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 55 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 56 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 57 #define MIN_STACK_RESERVED_PAGES (0) 58 59 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 60 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 61 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 62 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 63 64 define_pd_global(bool, RewriteBytecodes, true); 65 define_pd_global(bool, RewriteFrequentPairs, true); 66 67 define_pd_global(bool, PreserveFramePointer, false); 68 69 // GC Ergo Flags 70 define_pd_global(uintx, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 71 72 define_pd_global(uintx, TypeProfileLevel, 111); 73 74 define_pd_global(bool, CompactStrings, true); 75 76 // Clear short arrays bigger than one word in an arch-specific way 77 define_pd_global(intx, InitArrayShortSize, BytesPerLong); 78 79 define_pd_global(bool, ThreadLocalHandshakes, true); 80 81 #if defined(COMPILER1) || defined(COMPILER2) 82 define_pd_global(intx, InlineSmallCode, 1000); 83 #endif 84 85 #ifdef BUILTIN_SIM 86 #define UseBuiltinSim true 87 #define ARCH_FLAGS(develop, \ 88 product, \ 89 diagnostic, \ 90 experimental, \ 91 notproduct, \ 92 range, \ 93 constraint, \ 94 writeable) \ 95 \ 96 product(bool, NotifySimulator, UseBuiltinSim, \ 97 "tell the AArch64 sim where we are in method code") \ 98 \ 99 product(bool, UseSimulatorCache, false, \ 100 "tell sim to cache memory updates until exclusive op occurs") \ 101 \ 102 product(bool, DisableBCCheck, true, \ 103 "tell sim not to invoke bccheck callback") \ 104 \ 105 product(bool, NearCpool, true, \ 106 "constant pool is close to instructions") \ 107 \ 108 product(bool, UseBarriersForVolatile, false, \ 109 "Use memory barriers to implement volatile accesses") \ 110 \ 111 product(bool, UseCRC32, false, \ 112 "Use CRC32 instructions for CRC32 computation") \ 113 \ 114 product(bool, UseLSE, false, \ 115 "Use LSE instructions") \ 116 117 // Don't attempt to use Neon on builtin sim until builtin sim supports it 118 #define UseCRC32 false 119 #define UseSIMDForMemoryOps false 120 #define AvoidUnalignedAcesses false 121 122 #else 123 #define UseBuiltinSim false 124 #define NotifySimulator false 125 #define UseSimulatorCache false 126 #define DisableBCCheck true 127 #define ARCH_FLAGS(develop, \ 128 product, \ 129 diagnostic, \ 130 experimental, \ 131 notproduct, \ 132 range, \ 133 constraint, \ 134 writeable) \ 135 \ 136 product(bool, NearCpool, true, \ 137 "constant pool is close to instructions") \ 138 \ 139 product(bool, UseBarriersForVolatile, false, \ 140 "Use memory barriers to implement volatile accesses") \ 141 product(bool, UseNeon, false, \ 142 "Use Neon for CRC32 computation") \ 143 product(bool, UseCRC32, false, \ 144 "Use CRC32 instructions for CRC32 computation") \ 145 product(bool, UseSIMDForMemoryOps, false, \ 146 "Use SIMD instructions in generated memory move code") \ 147 product(bool, UseSIMDForArrayEquals, true, \ 148 "Use SIMD instructions in generated array equals code") \ 149 product(bool, UseSimpleArrayEquals, false, \ 150 "Use simpliest and shortest implementation for array equals") \ 151 product(bool, AvoidUnalignedAccesses, false, \ 152 "Avoid generating unaligned memory accesses") \ 153 product(bool, UseLSE, false, \ 154 "Use LSE instructions") \ 155 product(bool, UseBlockZeroing, true, \ 156 "Use DC ZVA for block zeroing") \ 157 product(intx, BlockZeroingLowLimit, 256, \ 158 "Minimum size in bytes when block zeroing will be used") \ 159 range(1, max_jint) \ 160 product(bool, TraceTraps, false, "Trace all traps the signal handler")\ 161 product(int, SoftwarePrefetchHintDistance, -1, \ 162 "Use prfm hint with specified distance in compiled code." \ 163 "Value -1 means off.") \ 164 range(-1, 4096) 165 #endif 166 167 168 #endif // CPU_AARCH64_GLOBALS_AARCH64_HPP