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*
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* 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).
*
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* 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_VM_GLOBALS_AARCH64_HPP
#define CPU_AARCH64_VM_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, ShareVtableStubs, true);
define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this
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, UseMembar, 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
#ifdef BUILTIN_SIM
#define UseBuiltinSim true
#define ARCH_FLAGS(develop, \
product, \
diagnostic, \
experimental, \
notproduct, \
range, \
constraint, \
writeable) \
\
product(bool, NotifySimulator, UseBuiltinSim, \
"tell the AArch64 sim where we are in method code") \
\
product(bool, UseSimulatorCache, false, \
"tell sim to cache memory updates until exclusive op occurs") \
\
product(bool, DisableBCCheck, true, \
"tell sim not to invoke bccheck callback") \
\
product(bool, NearCpool, true, \
"constant pool is close to instructions") \
\
product(bool, UseBarriersForVolatile, false, \
"Use memory barriers to implement volatile accesses") \
\
product(bool, UseCRC32, false, \
"Use CRC32 instructions for CRC32 computation") \
\
product(bool, UseLSE, false, \
"Use LSE instructions") \
// Don't attempt to use Neon on builtin sim until builtin sim supports it
#define UseCRC32 false
#define UseSIMDForMemoryOps false
#define AvoidUnalignedAcesses false
#else
#define UseBuiltinSim false
#define NotifySimulator false
#define UseSimulatorCache false
#define DisableBCCheck true
#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, 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, 32760)
#endif
#endif // CPU_AARCH64_VM_GLOBALS_AARCH64_HPP