globals_aarch64.hpp revision 9737:e286c9ccd58d 
1/*
2 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
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24 */
25
26#ifndef CPU_AARCH64_VM_GLOBALS_AARCH64_HPP
27#define CPU_AARCH64_VM_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
35define_pd_global(bool, ConvertSleepToYield,      true);
36define_pd_global(bool, ShareVtableStubs,         true);
37define_pd_global(bool, NeedsDeoptSuspend,        false); // only register window machines need this
38
39define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
40define_pd_global(bool, TrapBasedNullChecks,  false);
41define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
42
43// See 4827828 for this change. There is no globals_core_i486.hpp. I can't
44// assign a different value for C2 without touching a number of files. Use
45// #ifdef to minimize the change as it's late in Mantis. -- FIXME.
46// c1 doesn't have this problem because the fix to 4858033 assures us
47// the the vep is aligned at CodeEntryAlignment whereas c2 only aligns
48// the uep and the vep doesn't get real alignment but just slops on by
49// only assured that the entry instruction meets the 5 byte size requirement.
50#ifdef COMPILER2
51define_pd_global(intx, CodeEntryAlignment,       64);
52#else
53define_pd_global(intx, CodeEntryAlignment,       16);
54#endif // COMPILER2
55define_pd_global(intx, OptoLoopAlignment,        16);
56define_pd_global(intx, InlineFrequencyCount,     100);
57
58#define DEFAULT_STACK_YELLOW_PAGES (2)
59#define DEFAULT_STACK_RED_PAGES (1)
60#define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5))
61#define DEFAULT_STACK_RESERVED_PAGES (0)
62
63#define MIN_STACK_YELLOW_PAGES 1
64#define MIN_STACK_RED_PAGES    1
65#define MIN_STACK_SHADOW_PAGES 1
66#define MIN_STACK_RESERVED_PAGES (0)
67
68define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
69define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
70define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
71define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
72
73define_pd_global(bool, RewriteBytecodes,     true);
74define_pd_global(bool, RewriteFrequentPairs, true);
75
76define_pd_global(bool, UseMembar,            true);
77
78define_pd_global(bool, PreserveFramePointer, false);
79
80// GC Ergo Flags
81define_pd_global(uintx, CMSYoungGenPerWorker, 64*M);  // default max size of CMS young gen, per GC worker thread
82
83define_pd_global(uintx, TypeProfileLevel, 111);
84
85// No performance work done here yet.
86define_pd_global(bool, CompactStrings, false);
87
88// avoid biased locking while we are bootstrapping the aarch64 build
89define_pd_global(bool, UseBiasedLocking, false);
90
91#if defined(COMPILER1) || defined(COMPILER2)
92define_pd_global(intx, InlineSmallCode,          1000);
93#endif
94
95#ifdef BUILTIN_SIM
96#define UseBuiltinSim           true
97#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \
98                                                                        \
99  product(bool, NotifySimulator, UseBuiltinSim,                         \
100         "tell the AArch64 sim where we are in method code")            \
101                                                                        \
102  product(bool, UseSimulatorCache, false,                               \
103         "tell sim to cache memory updates until exclusive op occurs")  \
104                                                                        \
105  product(bool, DisableBCCheck, true,                                   \
106          "tell sim not to invoke bccheck callback")                    \
107                                                                        \
108  product(bool, NearCpool, true,                                        \
109         "constant pool is close to instructions")                      \
110                                                                        \
111  product(bool, UseBarriersForVolatile, false,                          \
112          "Use memory barriers to implement volatile accesses")         \
113                                                                        \
114  product(bool, UseCRC32, false,                                        \
115          "Use CRC32 instructions for CRC32 computation")               \
116
117// Don't attempt to use Neon on builtin sim until builtin sim supports it
118#define UseCRC32 false
119
120#else
121#define UseBuiltinSim           false
122#define NotifySimulator         false
123#define UseSimulatorCache       false
124#define DisableBCCheck          true
125#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \
126                                                                        \
127  product(bool, NearCpool, true,                                        \
128         "constant pool is close to instructions")                      \
129                                                                        \
130  product(bool, UseBarriersForVolatile, false,                          \
131          "Use memory barriers to implement volatile accesses")         \
132  product(bool, UseNeon, false,                                         \
133          "Use Neon for CRC32 computation")                             \
134  product(bool, UseCRC32, false,                                        \
135          "Use CRC32 instructions for CRC32 computation")               \
136  product(bool, TraceTraps, false, "Trace all traps the signal handler")
137
138#endif
139
140
141#endif // CPU_AARCH64_VM_GLOBALS_AARCH64_HPP
142