1 /* 2 * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2015, 2019, 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, ImplicitNullChecks, true); // Generate code for implicit null checks 36 define_pd_global(bool, TrapBasedNullChecks, false); 37 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast 38 39 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment. 40 define_pd_global(intx, CodeEntryAlignment, 64); 41 define_pd_global(intx, OptoLoopAlignment, 16); 42 define_pd_global(intx, InlineFrequencyCount, 100); 43 44 #define DEFAULT_STACK_YELLOW_PAGES (2) 45 #define DEFAULT_STACK_RED_PAGES (1) 46 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 47 // stack if compiled for unix and LP64. To pass stack overflow tests we need 48 // 20 shadow pages. 49 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5)) 50 #define DEFAULT_STACK_RESERVED_PAGES (1) 51 52 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 53 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 54 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 55 #define MIN_STACK_RESERVED_PAGES (0) 56 57 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 58 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 59 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 60 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 61 62 define_pd_global(bool, RewriteBytecodes, true); 63 define_pd_global(bool, RewriteFrequentPairs, true); 64 65 define_pd_global(bool, PreserveFramePointer, false); 66 67 define_pd_global(uintx, TypeProfileLevel, 111); 68 69 define_pd_global(bool, CompactStrings, true); 70 71 // Clear short arrays bigger than one word in an arch-specific way 72 define_pd_global(intx, InitArrayShortSize, BytesPerLong); 73 74 #if defined(COMPILER1) || defined(COMPILER2) 75 define_pd_global(intx, InlineSmallCode, 1000); 76 #endif 77 78 #include "runtime/flags/jvmFlag.hpp" 79 PRODUCT_FLAG(bool, NearCpool, true, JVMFlag::DEFAULT, 80 "constant pool is close to instructions"); 81 82 PRODUCT_FLAG(bool, UseBarriersForVolatile, false, JVMFlag::DEFAULT, 83 "Use memory barriers to implement volatile accesses"); 84 85 PRODUCT_FLAG(bool, UseNeon, false, JVMFlag::DEFAULT, 86 "Use Neon for CRC32 computation"); 87 88 PRODUCT_FLAG(bool, UseCRC32, false, JVMFlag::DEFAULT, 89 "Use CRC32 instructions for CRC32 computation"); 90 91 PRODUCT_FLAG(bool, UseSIMDForMemoryOps, false, JVMFlag::DEFAULT, 92 "Use SIMD instructions in generated memory move code"); 93 94 PRODUCT_FLAG(bool, UseSIMDForArrayEquals, true, JVMFlag::DEFAULT, 95 "Use SIMD instructions in generated array equals code"); 96 97 PRODUCT_FLAG(bool, UseSimpleArrayEquals, false, JVMFlag::DEFAULT, 98 "Use simpliest and shortest implementation for array equals"); 99 100 PRODUCT_FLAG(bool, AvoidUnalignedAccesses, false, JVMFlag::DEFAULT, 101 "Avoid generating unaligned memory accesses"); 102 103 PRODUCT_FLAG(bool, UseLSE, false, JVMFlag::DEFAULT, 104 "Use LSE instructions"); 105 106 PRODUCT_FLAG(bool, UseBlockZeroing, true, JVMFlag::DEFAULT, 107 "Use DC ZVA for block zeroing"); 108 109 PRODUCT_FLAG(intx, BlockZeroingLowLimit, 256, JVMFlag::RANGE, 110 "Minimum size in bytes when block zeroing will be used"); 111 FLAG_RANGE( BlockZeroingLowLimit, 1, max_jint); 112 113 PRODUCT_FLAG(bool, TraceTraps, false, JVMFlag::DEFAULT, 114 "Trace all traps the signal handler"); 115 116 PRODUCT_FLAG(int, SoftwarePrefetchHintDistance, -1, JVMFlag::RANGE, 117 "Use prfm hint with specified distance in compiled code." 118 "Value -1 means off."); 119 FLAG_RANGE( SoftwarePrefetchHintDistance, -1, 4096); 120 121 #endif // CPU_AARCH64_GLOBALS_AARCH64_HPP