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 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2015, 2019, Red Hat Inc. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#ifndef CPU_AARCH64_GLOBALS_AARCH64_HPP

#define CPU_AARCH64_GLOBALS_AARCH64_HPP

#include "utilities/globalDefinitions.hpp"

#include "utilities/macros.hpp"

// Sets the default values for platform dependent flags used by the runtime system.

// (see globals.hpp)

define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks

define_pd_global(bool, TrapBasedNullChecks,  false);

define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast

define_pd_global(uintx, CodeCacheSegmentSize,    64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.

define_pd_global(intx, CodeEntryAlignment,       64);

define_pd_global(intx, OptoLoopAlignment,        16);

define_pd_global(intx, InlineFrequencyCount,     100);

#define DEFAULT_STACK_YELLOW_PAGES (2)

#define DEFAULT_STACK_RED_PAGES (1)

// Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the

// stack if compiled for unix and LP64. To pass stack overflow tests we need

// 20 shadow pages.

#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))

#define DEFAULT_STACK_RESERVED_PAGES (1)

#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES

#define MIN_STACK_RED_PAGES    DEFAULT_STACK_RED_PAGES

#define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES

#define MIN_STACK_RESERVED_PAGES (0)

define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);

define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);

define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);

define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);

define_pd_global(bool, RewriteBytecodes,     true);

define_pd_global(bool, RewriteFrequentPairs, true);

define_pd_global(bool, PreserveFramePointer, false);

// GC Ergo Flags

define_pd_global(uintx, CMSYoungGenPerWorker, 64*M);  // default max size of CMS young gen, per GC worker thread

define_pd_global(uintx, TypeProfileLevel, 111);

define_pd_global(bool, CompactStrings, true);

// Clear short arrays bigger than one word in an arch-specific way

define_pd_global(intx, InitArrayShortSize, BytesPerLong);

define_pd_global(bool, ThreadLocalHandshakes, true);

#if defined(COMPILER1) || defined(COMPILER2)

define_pd_global(intx, InlineSmallCode,          1000);

#endif

#define ARCH_FLAGS(develop, \

                   product, \

                   diagnostic, \

                   experimental, \

                   notproduct, \

                   range, \

                   constraint, \

                   writeable) \

                                                                        \

  product(bool, NearCpool, true,                                        \

         "constant pool is close to instructions")                      \

                                                                        \

  product(bool, UseBarriersForVolatile, false,                          \

          "Use memory barriers to implement volatile accesses")         \

  product(bool, UseNeon, false,                                         \

          "Use Neon for CRC32 computation")                             \

  product(bool, UseCRC32, false,                                        \

          "Use CRC32 instructions for CRC32 computation")               \

  product(bool, UseSIMDForMemoryOps, false,                             \

          "Use SIMD instructions in generated memory move code")        \

  product(bool, UseSIMDForArrayEquals, true,                            \

          "Use SIMD instructions in generated array equals code")       \

  product(bool, UseSimpleArrayEquals, false,                            \

          "Use simpliest and shortest implementation for array equals") \

  product(bool, AvoidUnalignedAccesses, false,                          \

          "Avoid generating unaligned memory accesses")                 \

  product(bool, UseLSE, false,                                          \

          "Use LSE instructions")                                       \

  product(bool, UseBlockZeroing, true,                                  \

          "Use DC ZVA for block zeroing")                               \

  product(intx, BlockZeroingLowLimit, 256,                              \

          "Minimum size in bytes when block zeroing will be used")      \

          range(1, max_jint)                                            \

  product(bool, TraceTraps, false, "Trace all traps the signal handler")\

  product(int, SoftwarePrefetchHintDistance, -1,                        \

          "Use prfm hint with specified distance in compiled code."     \

          "Value -1 means off.")                                        \

          range(-1, 4096)

#endif // CPU_AARCH64_GLOBALS_AARCH64_HPP