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(uintx, CodeCacheSegmentSize, 64 COMPILER1_AND_COMPILER2_PRESENT(+64)); // Tiered compilation has large code-entry alignment.
40 define_pd_global(intx, CodeEntryAlignment, 64);
41 define_pd_global(intx, OptoLoopAlignment, 16);
42
43 #define DEFAULT_STACK_YELLOW_PAGES (2)
44 #define DEFAULT_STACK_RED_PAGES (1)
45 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
46 // stack if compiled for unix and LP64. To pass stack overflow tests we need
47 // 20 shadow pages.
48 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))
49 #define DEFAULT_STACK_RESERVED_PAGES (1)
50
51 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
52 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
53 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
54 #define MIN_STACK_RESERVED_PAGES (0)
55
56 define_pd_global(bool, VMContinuations, true);
57
58 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
59 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
60 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
61 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
62
63 define_pd_global(bool, RewriteBytecodes, true);
64 define_pd_global(bool, RewriteFrequentPairs, true);
65
66 define_pd_global(bool, PreserveFramePointer, false);
67
68 define_pd_global(uintx, TypeProfileLevel, 111);
69
70 define_pd_global(bool, CompactStrings, true);
71
72 // Clear short arrays bigger than one word in an arch-specific way
73 define_pd_global(intx, InitArrayShortSize, BytesPerLong);
74
75 #if defined(COMPILER1) || defined(COMPILER2)
76 define_pd_global(intx, InlineSmallCode, 1000);
77 #endif
78
79 #define ARCH_FLAGS(develop, \
80 product, \
81 notproduct, \
82 range, \
83 constraint) \
84 \
85 product(bool, NearCpool, true, \
86 "constant pool is close to instructions") \
87 product(bool, UseNeon, false, \
88 "Use Neon for CRC32 computation") \
89 product(bool, UseCRC32, false, \
90 "Use CRC32 instructions for CRC32 computation") \
91 product(bool, UseSIMDForMemoryOps, false, \
92 "Use SIMD instructions in generated memory move code") \
93 product(bool, UseSIMDForArrayEquals, true, \
94 "Use SIMD instructions in generated array equals code") \
95 product(bool, UseSimpleArrayEquals, false, \
96 "Use simplest and shortest implementation for array equals") \
97 product(bool, UseSIMDForBigIntegerShiftIntrinsics, true, \
98 "Use SIMD instructions for left/right shift of BigInteger") \
99 product(bool, AvoidUnalignedAccesses, false, \
100 "Avoid generating unaligned memory accesses") \
101 product(bool, UseLSE, false, \
102 "Use LSE instructions") \
103 product(uint, UseSVE, 0, \
104 "Highest supported SVE instruction set version") \
105 range(0, 2) \
106 product(bool, UseBlockZeroing, true, \
107 "Use DC ZVA for block zeroing") \
108 product(intx, BlockZeroingLowLimit, 256, \
109 "Minimum size in bytes when block zeroing will be used") \
110 range(wordSize, max_jint) \
111 product(bool, TraceTraps, false, "Trace all traps the signal handler")\
112 product(int, SoftwarePrefetchHintDistance, -1, \
113 "Use prfm hint with specified distance in compiled code." \
114 "Value -1 means off.") \
115 range(-1, 4096) \
116 product(ccstr, OnSpinWaitInst, "none", DIAGNOSTIC, \
117 "The instruction to use to implement " \
118 "java.lang.Thread.onSpinWait()." \
119 "Options: none, nop, isb, yield.") \
120 product(uint, OnSpinWaitInstCount, 1, DIAGNOSTIC, \
121 "The number of OnSpinWaitInst instructions to generate." \
122 "It cannot be used with OnSpinWaitInst=none.") \
123 range(1, 99) \
124 product(ccstr, UseBranchProtection, "none", \
125 "Branch Protection to use: none, standard, pac-ret") \
126
127 // end of ARCH_FLAGS
128
129 #endif // CPU_AARCH64_GLOBALS_AARCH64_HPP