1 /*
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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(bool, DelayCompilerStubsGeneration, COMPILER2_OR_JVMCI);
40
41 define_pd_global(uintx, CodeCacheSegmentSize, 64);
42 define_pd_global(intx, CodeEntryAlignment, 64);
43 define_pd_global(intx, OptoLoopAlignment, 16);
44
45 #define DEFAULT_STACK_YELLOW_PAGES (2)
46 #define DEFAULT_STACK_RED_PAGES (1)
47 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
48 // stack if compiled for unix and LP64. To pass stack overflow tests we need
49 // 20 shadow pages.
50 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))
51 #define DEFAULT_STACK_RESERVED_PAGES (1)
52
53 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
54 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
55 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
56 #define MIN_STACK_RESERVED_PAGES (0)
57
58 define_pd_global(bool, VMContinuations, true);
59
60 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
61 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
62 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
63 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
64
65 define_pd_global(bool, RewriteBytecodes, true);
66 define_pd_global(bool, RewriteFrequentPairs, true);
67
68 define_pd_global(bool, PreserveFramePointer, false);
69
70 define_pd_global(uintx, TypeProfileLevel, 111);
71
72 define_pd_global(bool, CompactStrings, true);
73
74 // Clear short arrays bigger than one word in an arch-specific way
75 define_pd_global(intx, InitArrayShortSize, BytesPerLong);
76
77 #if defined(COMPILER1) || defined(COMPILER2)
78 define_pd_global(intx, InlineSmallCode, 1000);
79 #endif
80
81 #define ARCH_FLAGS(develop, \
82 product, \
83 range, \
84 constraint) \
85 \
86 product(bool, NearCpool, true, \
87 "constant pool is close to instructions") \
88 product(bool, UseCRC32, false, \
89 "Use CRC32 instructions for CRC32 computation") \
90 product(bool, UseCryptoPmullForCRC32, false, \
91 "Use Crypto PMULL instructions for CRC32 computation") \
92 product(bool, UseSIMDForMemoryOps, false, \
93 "Use SIMD instructions in generated memory move code") \
94 product(bool, UseSIMDForArrayEquals, true, \
95 "Use SIMD instructions in generated array equals code") \
96 product(bool, UseSimpleArrayEquals, false, \
97 "Use simplest and shortest implementation for array equals") \
98 product(bool, UseSIMDForBigIntegerShiftIntrinsics, true, \
99 "Use SIMD instructions for left/right shift of BigInteger") \
100 product(bool, AvoidUnalignedAccesses, false, \
101 "Avoid generating unaligned memory accesses") \
102 product(bool, UseLSE, false, \
103 "Use LSE instructions") \
104 product(uint, UseSVE, 0, \
105 "Highest supported SVE instruction set version") \
106 range(0, 2) \
107 product(bool, UseBlockZeroing, true, \
108 "Use DC ZVA for block zeroing") \
109 product(intx, BlockZeroingLowLimit, 256, \
110 "Minimum size in bytes when block zeroing will be used") \
111 range(wordSize, max_jint) \
112 product(bool, TraceTraps, false, "Trace all traps the signal handler")\
113 product(int, SoftwarePrefetchHintDistance, -1, \
114 "Use prfm hint with specified distance in compiled code." \
115 "Value -1 means off.") \
116 range(-1, 4096) \
117 product(ccstr, OnSpinWaitInst, "yield", DIAGNOSTIC, \
118 "The instruction to use to implement " \
119 "java.lang.Thread.onSpinWait()." \
120 "Options: none, nop, isb, yield.") \
121 product(uint, OnSpinWaitInstCount, 1, DIAGNOSTIC, \
122 "The number of OnSpinWaitInst instructions to generate." \
123 "It cannot be used with OnSpinWaitInst=none.") \
124 range(1, 99) \
125 product(ccstr, UseBranchProtection, "none", \
126 "Branch Protection to use: none, standard, pac-ret") \
127 product(bool, AlwaysMergeDMB, true, DIAGNOSTIC, \
128 "Always merge DMB instructions in code emission") \
129
130 // end of ARCH_FLAGS
131
132 #endif // CPU_AARCH64_GLOBALS_AARCH64_HPP