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#ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP
#define CPU_SPARC_VM_GLOBALS_SPARC_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)
// For sparc we do not do call backs when a thread is in the interpreter, because the
// interpreter dispatch needs at least two instructions - first to load the dispatch address
// in a register, and second to jmp. The swapping of the dispatch table may occur _after_
// the load of the dispatch address and hence the jmp would still go to the location
// according to the prior table. So, we let the thread continue and let it block by itself.
define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second
define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc.
define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast
define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
define_pd_global(intx, CodeEntryAlignment, 32);
// The default setting 16/16 seems to work best.
// (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
define_pd_global(intx, InlineSmallCode, 1500);
#define DEFAULT_STACK_YELLOW_PAGES (2)
#define DEFAULT_STACK_RED_PAGES (1)
#define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0))
define_pd_global(intx, CompilerThreadStackSize, 1024);
define_pd_global(intx, ThreadStackSize, 1024);
define_pd_global(intx, VMThreadStackSize, 1024);
#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
#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(size_t, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread
define_pd_global(uintx, TypeProfileLevel, 111);
define_pd_global(bool, CompactStrings, true);
define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
define_pd_global(bool, ThreadLocalHandshakes, true);
#define ARCH_FLAGS(develop, \
product, \
diagnostic, \
experimental, \
notproduct, \
range, \
constraint, \
writeable) \
\
product(intx, UseVIS, 99, \
"Highest supported VIS instructions set on SPARC") \
range(0, 99) \
\
product(bool, UseCBCond, false, \
"Use compare and branch instruction on SPARC") \
\
product(bool, UseMPMUL, false, \
"Use multi-precision multiply instruction (mpmul) on SPARC") \
\
product(bool, UseBlockZeroing, false, \
"Use special cpu instructions for block zeroing") \
\
product(intx, BlockZeroingLowLimit, 2048, \
"Minimum size in bytes when block zeroing will be used") \
range(1, max_jint) \
\
product(bool, UseBlockCopy, false, \
"Use special cpu instructions for block copy") \
\
product(intx, BlockCopyLowLimit, 2048, \
"Minimum size in bytes when block copy will be used") \
range(1, max_jint) \
\
product(bool, UseNiagaraInstrs, false, \
"Use Niagara-efficient instruction subset") \
\
develop(bool, UseCASForSwap, false, \
"Do not use swap instructions, but only CAS (in a loop) on SPARC")\
\
product(uintx, ArraycopySrcPrefetchDistance, 0, \
"Distance to prefetch source array in arraycopy") \
constraint(ArraycopySrcPrefetchDistanceConstraintFunc, AfterErgo) \
\
product(uintx, ArraycopyDstPrefetchDistance, 0, \
"Distance to prefetch destination array in arraycopy") \
constraint(ArraycopyDstPrefetchDistanceConstraintFunc, AfterErgo) \
#endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP