globals_riscv.hpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * accompanied this code).
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 * 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,
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#ifndef CPU_RISCV_GLOBALS_RISCV_HPP
#define CPU_RISCV_GLOBALS_RISCV_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(bool, DelayCompilerStubsGeneration, COMPILER2_PRESENT(true) NOT_COMPILER2(false));

define_pd_global(size_t, CodeCacheSegmentSize,   64 COMPILER1_AND_COMPILER2_PRESENT(+64)); // Tiered compilation has large code-entry alignment.
define_pd_global(uint, CodeEntryAlignment,       64);
define_pd_global(intx, OptoLoopAlignment,        16);

#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, VMContinuations, true);

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);

define_pd_global(intx, InlineSmallCode,          1000);

#define ARCH_FLAGS(develop,                                                      \
                   product,                                                      \
                   range,                                                        \
                   constraint)                                                   \
                                                                                 \
  product(bool, UseBlockZeroing, false,                                          \
          "Use Zicboz for block zeroing")                                        \
  product(intx, BlockZeroingLowLimit, 256,                                       \
          "Minimum size in bytes when block zeroing will be used")               \
          range(1, max_jint)                                                     \
  product(intx, CacheLineSize, DEFAULT_CACHE_LINE_SIZE,                          \
          "Size in bytes of a CPU cache line")                                   \
          range(wordSize, max_jint)                                              \
  product(bool, TraceTraps, false, "Trace all traps the signal handler")         \
  product(bool, UseConservativeFence, false,                                     \
          "Extend i for r and o for w in the pred/succ flags of fence")          \
  product(bool, AvoidUnalignedAccesses, true,                                    \
          "Avoid generating unaligned memory accesses")                          \
  product(bool, UseRVA20U64, true, "Use RVA20U64 profile")                       \
  product(bool, UseRVA22U64, false, EXPERIMENTAL, "Use RVA22U64 profile")        \
  product(bool, UseRVA23U64, false, EXPERIMENTAL, "Use RVA23U64 profile")        \
  product(bool, UseRVC, false, DIAGNOSTIC, "Use RVC instructions")               \
  product(bool, UseRVV, false, DIAGNOSTIC, "Use RVV instructions")               \
  product(bool, UseZba, false, DIAGNOSTIC, "Use Zba instructions")               \
  product(bool, UseZbb, false, DIAGNOSTIC, "Use Zbb instructions")               \
  product(bool, UseZbkb, false, EXPERIMENTAL, "Use Zbkb instructions")           \
  product(bool, UseZbs, false, DIAGNOSTIC, "Use Zbs instructions")               \
  product(bool, UseZfa, false, DIAGNOSTIC, "Use Zfa instructions")               \
  product(bool, UseZfh, false, DIAGNOSTIC, "Use Zfh instructions")               \
  product(bool, UseZfhmin, false, DIAGNOSTIC, "Use Zfhmin instructions")         \
  product(bool, UseZacas, false, EXPERIMENTAL, "Use Zacas instructions")         \
  product(bool, UseZabha, false, EXPERIMENTAL, "Use UseZabha instructions")      \
  product(bool, UseZcb, false, EXPERIMENTAL, "Use Zcb instructions")             \
  product(bool, UseZic64b, false, EXPERIMENTAL, "Use Zic64b instructions")       \
  product(bool, UseZicbom, false, EXPERIMENTAL, "Use Zicbom instructions")       \
  product(bool, UseZicbop, false, EXPERIMENTAL, "Use Zicbop instructions")       \
  product(bool, UseZicboz, false, EXPERIMENTAL, "Use Zicboz instructions")       \
  product(bool, UseZicond, false, DIAGNOSTIC, "Use Zicond instructions")         \
  product(bool, UseZihintpause, false, EXPERIMENTAL,                             \
          "Use Zihintpause instructions")                                        \
  product(bool, UseZtso, false, EXPERIMENTAL, "Assume Ztso memory model")        \
  product(bool, UseZvbb, false, DIAGNOSTIC, "Use Zvbb instructions")             \
  product(bool, UseZvbc, false, DIAGNOSTIC, "Use Zvbc instructions")             \
  product(bool, UseZbc, false, EXPERIMENTAL, "Use Zbc instructions")             \
  product(bool, UseZvfh, false, DIAGNOSTIC, "Use Zvfh instructions")             \
  product(bool, UseZvfhmin, false, DIAGNOSTIC, "Use Zvfhmin instructions")       \
  product(bool, UseZvkg, false, DIAGNOSTIC, "Use Zvkg instructions")             \
  product(bool, UseZvkn, false, DIAGNOSTIC,                                      \
          "Use Zvkn group extension, Zvkned, Zvknhb, Zvkb, Zvkt")                \
  product(bool, UseCtxFencei, false, EXPERIMENTAL,                               \
          "Use PR_RISCV_CTX_SW_FENCEI_ON to avoid explicit icache flush")

#endif // CPU_RISCV_GLOBALS_RISCV_HPP