1 /*
2 * Copyright (c) 2000, 2021, 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
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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 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(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
57 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
58 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
59 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
60
61 define_pd_global(bool, RewriteBytecodes, true);
62 define_pd_global(bool, RewriteFrequentPairs, true);
63
64 define_pd_global(bool, PreserveFramePointer, false);
65
66 define_pd_global(uintx, TypeProfileLevel, 111);
67
68 define_pd_global(bool, CompactStrings, true);
69
70 // Clear short arrays bigger than one word in an arch-specific way
71 define_pd_global(intx, InitArrayShortSize, BytesPerLong);
72
73 #if defined(COMPILER1) || defined(COMPILER2)
74 define_pd_global(intx, InlineSmallCode, 1000);
75 #endif
76
77 #define ARCH_FLAGS(develop, \
78 product, \
79 notproduct, \
80 range, \
81 constraint) \
82 \
83 product(bool, NearCpool, true, \
84 "constant pool is close to instructions") \
85 product(bool, UseNeon, false, \
86 "Use Neon for CRC32 computation") \
87 product(bool, UseCRC32, false, \
88 "Use CRC32 instructions for CRC32 computation") \
89 product(bool, UseSIMDForMemoryOps, false, \
90 "Use SIMD instructions in generated memory move code") \
91 product(bool, UseSIMDForArrayEquals, true, \
92 "Use SIMD instructions in generated array equals code") \
93 product(bool, UseSimpleArrayEquals, false, \
94 "Use simpliest and shortest implementation for array equals") \
95 product(bool, UseSIMDForBigIntegerShiftIntrinsics, true, \
96 "Use SIMD instructions for left/right shift of BigInteger") \
97 product(bool, AvoidUnalignedAccesses, false, \
98 "Avoid generating unaligned memory accesses") \
99 product(bool, UseLSE, false, \
100 "Use LSE instructions") \
101 product(uint, UseSVE, 0, \
102 "Highest supported SVE instruction set version") \
103 range(0, 2) \
104 product(bool, UseBlockZeroing, true, \
105 "Use DC ZVA for block zeroing") \
106 product(intx, BlockZeroingLowLimit, 256, \
107 "Minimum size in bytes when block zeroing will be used") \
108 range(1, max_jint) \
109 product(bool, TraceTraps, false, "Trace all traps the signal handler")\
110 product(int, SoftwarePrefetchHintDistance, -1, \
111 "Use prfm hint with specified distance in compiled code." \
112 "Value -1 means off.") \
113 range(-1, 4096)
114
115 // end of ARCH_FLAGS
116
117 #endif // CPU_AARCH64_GLOBALS_AARCH64_HPP