/*

 * Copyright (c) 2002, 2015, Oracle and/or its affiliates. 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef CPU_PPC_VM_GLOBALS_PPC_HPP

#define CPU_PPC_VM_GLOBALS_PPC_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, ConvertSleepToYield,   true);

define_pd_global(bool, ShareVtableStubs,      false); // Improves performance markedly for mtrt and compress.

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,   true);

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

// Use large code-entry alignment.

define_pd_global(intx, CodeEntryAlignment,    128);

define_pd_global(intx, OptoLoopAlignment,     16);

define_pd_global(intx, InlineFrequencyCount,  100);

define_pd_global(intx, InlineSmallCode,       1500);

define_pd_global(intx, PreInflateSpin,        10);

// Flags for template interpreter.

define_pd_global(bool, RewriteBytecodes,      true);

define_pd_global(bool, RewriteFrequentPairs,  true);

define_pd_global(bool, UseMembar,             false);

// GC Ergo Flags

define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.

// Platform dependent flag handling: flags only defined on this platform.

#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct)  \

                                                                            \

  /* Load poll address from thread. This is used to implement per-thread */ \

  /* safepoints on platforms != IA64. */                                    \

  product(bool, LoadPollAddressFromThread, false,                           \

          "Load polling page address from thread object (required for "     \

          "per-thread safepoints on platforms != IA64)")                    \

                                                                            \

  product(uintx, PowerArchitecturePPC64, 0,                                 \

          "CPU Version: x for PowerX. Currently recognizes Power5 to "      \

                                                                            \

  /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \

  /* indirect call by a direct call.                                */      \

  product(bool, ReoptimizeCallSequences, true,                              \

          "Reoptimize code-sequences of calls at runtime.")                 \

                                                                            \

  product(bool, UseLoadInstructionsForStackBangingPPC64, false,             \

          "Use load instructions for stack banging.")                       \

                                                                            \

  /* special instructions */                                                \

                                                                            \

  product(bool, UseCountLeadingZerosInstructionsPPC64, true,                \

          "Use count leading zeros instructions.")                          \

                                                                            \

  product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false,          \

          "Use extended versions of load-and-reserve instructions.")        \

                                                                            \

  product(bool, UseRotateAndMaskInstructionsPPC64, true,                    \

          "Use rotate and mask instructions.")                              \

                                                                            \

  product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true,       \

          "Use static branch prediction hints in CAS operations.")          \

  product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false,      \

          "Use static branch prediction hints for uncommon paths.")         \

                                                                            \

  product(bool, UsePower6SchedulerPPC64, false,                             \

          "Use Power6 Scheduler.")                                          \

                                                                            \

  product(bool, InsertEndGroupPPC64, false,                                 \

          "Insert EndGroup instructions to optimize for Power6.")           \

                                                                            \

  /* Trap based checks. */                                                  \

  /* Trap based checks use the ppc trap instructions to check certain */    \

  /* conditions. This instruction raises a SIGTRAP caught by the      */    \

  /* exception handler of the VM.                                     */    \

  product(bool, UseSIGTRAP, true,                                           \

          "Allow trap instructions that make use of SIGTRAP. Use this to "  \

          "switch off all optimizations requiring SIGTRAP.")                \

  product(bool, TrapBasedICMissChecks, true,                                \

          "Raise and handle SIGTRAP if inline cache miss detected.")        \

  product(bool, TrapBasedNotEntrantChecks, true,                            \

          "Raise and handle SIGTRAP if calling not entrant or zombie"       \

          " method.")                                                       \

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

          "handles.")                                                       \

                                                                            \

  product(bool, ZapMemory, false, "Write 0x0101... to empty memory."        \

          " Use this to ease debugging.")                                   \

#endif // CPU_PPC_VM_GLOBALS_PPC_HPP