1 /*
2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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24
25 #ifndef CPU_SPARC_GLOBALS_SPARC_HPP
26 #define CPU_SPARC_GLOBALS_SPARC_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29 #include "utilities/macros.hpp"
30
31 // Sets the default values for platform dependent flags used by the runtime system.
32 // (see globals.hpp)
33
34 // For sparc we do not do call backs when a thread is in the interpreter, because the
35 // interpreter dispatch needs at least two instructions - first to load the dispatch address
36 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_
37 // the load of the dispatch address and hence the jmp would still go to the location
38 // according to the prior table. So, we let the thread continue and let it block by itself.
39 define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second
40
41 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
42 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc.
43 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast
44
45 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
46 define_pd_global(intx, CodeEntryAlignment, 32);
47 // The default setting 16/16 seems to work best.
48 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
49 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
50 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
51 define_pd_global(intx, InlineSmallCode, 1500);
52
53 #define DEFAULT_STACK_YELLOW_PAGES (2)
54 #define DEFAULT_STACK_RED_PAGES (1)
55 #define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0))
56
57 define_pd_global(intx, CompilerThreadStackSize, 1024);
58 define_pd_global(intx, ThreadStackSize, 1024);
59 define_pd_global(intx, VMThreadStackSize, 1024);
60 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
61
62 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
63 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
64 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
65 #define MIN_STACK_RESERVED_PAGES (0)
66
67 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
68 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
69 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
70 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
71
72 define_pd_global(bool, RewriteBytecodes, true);
73 define_pd_global(bool, RewriteFrequentPairs, true);
74
75 define_pd_global(bool, PreserveFramePointer, false);
76
77 define_pd_global(uintx, TypeProfileLevel, 111);
78
79 define_pd_global(bool, CompactStrings, true);
80
81 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
82
83 define_pd_global(bool, ThreadLocalHandshakes, true);
84
85 #define ARCH_FLAGS(develop, \
86 product, \
87 diagnostic, \
88 experimental, \
89 notproduct, \
90 range, \
91 constraint, \
92 writeable) \
93 \
94 product(intx, UseVIS, 99, \
95 "Highest supported VIS instructions set on SPARC") \
96 range(0, 99) \
97 \
98 product(bool, UseCBCond, false, \
99 "Use compare and branch instruction on SPARC") \
100 \
101 product(bool, UseMPMUL, false, \
102 "Use multi-precision multiply instruction (mpmul) on SPARC") \
103 \
104 product(bool, UseBlockZeroing, false, \
105 "Use special cpu instructions for block zeroing") \
106 \
107 product(intx, BlockZeroingLowLimit, 2048, \
108 "Minimum size in bytes when block zeroing will be used") \
109 range(1, max_jint) \
110 \
111 product(bool, UseBlockCopy, false, \
112 "Use special cpu instructions for block copy") \
113 \
114 product(intx, BlockCopyLowLimit, 2048, \
115 "Minimum size in bytes when block copy will be used") \
116 range(1, max_jint) \
117 \
118 product(bool, UseNiagaraInstrs, false, \
119 "Use Niagara-efficient instruction subset") \
120 \
121 develop(bool, UseCASForSwap, false, \
122 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
123 \
124 product(uintx, ArraycopySrcPrefetchDistance, 0, \
125 "Distance to prefetch source array in arraycopy") \
126 constraint(ArraycopySrcPrefetchDistanceConstraintFunc, AfterErgo) \
127 \
128 product(uintx, ArraycopyDstPrefetchDistance, 0, \
129 "Distance to prefetch destination array in arraycopy") \
130 constraint(ArraycopyDstPrefetchDistanceConstraintFunc, AfterErgo) \
131
132 #endif // CPU_SPARC_GLOBALS_SPARC_HPP