1 /*
2 * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020, 2022, Huawei Technologies Co., Ltd. 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
22 * questions.
23 *
24 */
25
26 #ifndef CPU_RISCV_GLOBALS_RISCV_HPP
27 #define CPU_RISCV_GLOBALS_RISCV_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 define_pd_global(intx, InlineFrequencyCount, 100);
43
44 #define DEFAULT_STACK_YELLOW_PAGES (2)
45 #define DEFAULT_STACK_RED_PAGES (1)
46 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
47 // stack if compiled for unix and LP64. To pass stack overflow tests we need
48 // 20 shadow pages.
49 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))
50 #define DEFAULT_STACK_RESERVED_PAGES (1)
51
52 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
53 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
54 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
55 #define MIN_STACK_RESERVED_PAGES (0)
56
57 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
58 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
59 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
60 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
61
62 define_pd_global(bool, RewriteBytecodes, true);
63 define_pd_global(bool, RewriteFrequentPairs, true);
64
65 define_pd_global(bool, PreserveFramePointer, false);
66
67 define_pd_global(uintx, TypeProfileLevel, 111);
68
69 define_pd_global(bool, CompactStrings, true);
70
71 // Clear short arrays bigger than one word in an arch-specific way
72 define_pd_global(intx, InitArrayShortSize, BytesPerLong);
73
74 define_pd_global(intx, InlineSmallCode, 1000);
75
76 #define ARCH_FLAGS(develop, \
77 product, \
78 notproduct, \
79 range, \
80 constraint) \
81 \
82 product(bool, NearCpool, true, \
83 "constant pool is close to instructions") \
84 product(intx, BlockZeroingLowLimit, 256, \
85 "Minimum size in bytes when block zeroing will be used") \
86 range(1, max_jint) \
87 product(bool, TraceTraps, false, "Trace all traps the signal handler") \
88 /* For now we're going to be safe and add the I/O bits to userspace fences. */ \
89 product(bool, UseConservativeFence, true, \
90 "Extend i for r and o for w in the pred/succ flags of fence") \
91 product(bool, AvoidUnalignedAccesses, true, \
92 "Avoid generating unaligned memory accesses") \
93 product(bool, UseRVV, false, EXPERIMENTAL, "Use RVV instructions") \
94 product(bool, UseRVC, false, EXPERIMENTAL, "Use RVC instructions") \
95 product(bool, UseZba, false, EXPERIMENTAL, "Use Zba instructions") \
96 product(bool, UseZbb, false, EXPERIMENTAL, "Use Zbb instructions") \
97 product(bool, UseZbs, false, EXPERIMENTAL, "Use Zbs instructions") \
98 product(bool, UseRVVForBigIntegerShiftIntrinsics, true, \
99 "Use RVV instructions for left/right shift of BigInteger")
100
101 #endif // CPU_RISCV_GLOBALS_RISCV_HPP