1 /* 2 * Copyright (c) 2000, 2019, 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 // ObjectMonitor ref_count not implemented in C2 fast_lock() or 75 // fast_unlock() so use a handshake for safety. 76 define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true); 77 78 #if defined(COMPILER1) || defined(COMPILER2) 79 define_pd_global(intx, InlineSmallCode, 1000); 80 #endif 81 82 #define ARCH_FLAGS(develop, \ 83 product, \ 84 diagnostic, \ 85 experimental, \ 86 notproduct, \ 87 range, \ 88 constraint, \ 89 writeable) \ 90 \ 91 product(bool, NearCpool, true, \ 92 "constant pool is close to instructions") \ 93 \ 94 product(bool, UseBarriersForVolatile, false, \ 95 "Use memory barriers to implement volatile accesses") \ 96 product(bool, UseNeon, false, \ 97 "Use Neon for CRC32 computation") \ 98 product(bool, UseCRC32, false, \ 99 "Use CRC32 instructions for CRC32 computation") \ 100 product(bool, UseSIMDForMemoryOps, false, \ 101 "Use SIMD instructions in generated memory move code") \ 102 product(bool, UseSIMDForArrayEquals, true, \ 103 "Use SIMD instructions in generated array equals code") \ 104 product(bool, UseSimpleArrayEquals, false, \ 105 "Use simpliest and shortest implementation for array equals") \ 106 product(bool, AvoidUnalignedAccesses, false, \ 107 "Avoid generating unaligned memory accesses") \ 108 product(bool, UseLSE, false, \ 109 "Use LSE instructions") \ 110 product(bool, UseBlockZeroing, true, \ 111 "Use DC ZVA for block zeroing") \ 112 product(intx, BlockZeroingLowLimit, 256, \ 113 "Minimum size in bytes when block zeroing will be used") \ 114 range(1, max_jint) \ 115 product(bool, TraceTraps, false, "Trace all traps the signal handler")\ 116 product(int, SoftwarePrefetchHintDistance, -1, \ 117 "Use prfm hint with specified distance in compiled code." \ 118 "Value -1 means off.") \ 119 range(-1, 4096) 120 121 #endif // CPU_AARCH64_GLOBALS_AARCH64_HPP