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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
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 * 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.
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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);

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);

#if defined(COMPILER1) || defined(COMPILER2)
define_pd_global(intx, InlineSmallCode,          1000);
#endif

#include "runtime/flags/jvmFlag.hpp"
PRODUCT_FLAG(bool,     NearCpool, true, JVMFlag::DEFAULT,
                       "constant pool is close to instructions");

PRODUCT_FLAG(bool,     UseBarriersForVolatile, false, JVMFlag::DEFAULT,
                       "Use memory barriers to implement volatile accesses");

PRODUCT_FLAG(bool,     UseNeon, false, JVMFlag::DEFAULT,
                       "Use Neon for CRC32 computation");

PRODUCT_FLAG(bool,     UseCRC32, false, JVMFlag::DEFAULT,
                       "Use CRC32 instructions for CRC32 computation");

PRODUCT_FLAG(bool,     UseSIMDForMemoryOps, false, JVMFlag::DEFAULT,
                       "Use SIMD instructions in generated memory move code");

PRODUCT_FLAG(bool,     UseSIMDForArrayEquals, true, JVMFlag::DEFAULT,
                       "Use SIMD instructions in generated array equals code");

PRODUCT_FLAG(bool,     UseSimpleArrayEquals, false, JVMFlag::DEFAULT,
                       "Use simpliest and shortest implementation for array equals");

PRODUCT_FLAG(bool,     AvoidUnalignedAccesses, false, JVMFlag::DEFAULT,
                       "Avoid generating unaligned memory accesses");

PRODUCT_FLAG(bool,     UseLSE, false, JVMFlag::DEFAULT,
                       "Use LSE instructions");

PRODUCT_FLAG(bool,     UseBlockZeroing, true, JVMFlag::DEFAULT,
                       "Use DC ZVA for block zeroing");

PRODUCT_FLAG(intx,     BlockZeroingLowLimit, 256, JVMFlag::RANGE,
                       "Minimum size in bytes when block zeroing will be used");
   FLAG_RANGE(         BlockZeroingLowLimit, 1, max_jint);

PRODUCT_FLAG(bool,     TraceTraps, false, JVMFlag::DEFAULT,
                       "Trace all traps the signal handler");

PRODUCT_FLAG(int,      SoftwarePrefetchHintDistance, -1, JVMFlag::RANGE,
                       "Use prfm hint with specified distance in compiled code."
                       "Value -1 means off.");
   FLAG_RANGE(         SoftwarePrefetchHintDistance, -1, 4096);

#endif // CPU_AARCH64_GLOBALS_AARCH64_HPP