/* * Copyright (c) 2002, 2025, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012, 2024 SAP SE. 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_GLOBALS_PPC_HPP #define CPU_PPC_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, 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. define_pd_global(bool, DelayCompilerStubsGeneration, COMPILER2_OR_JVMCI); #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(+2)) #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 (3 DEBUG_ONLY(+1)) #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); // Use large code-entry alignment. define_pd_global(size_t, CodeCacheSegmentSize, 128); define_pd_global(intx, CodeEntryAlignment, 64); define_pd_global(intx, OptoLoopAlignment, 16); define_pd_global(intx, InlineSmallCode, 1500); // Flags for template interpreter. 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); // 2x unrolled loop is shorter with more than 9 HeapWords. define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); // Platform dependent flag handling: flags only defined on this platform. #define ARCH_FLAGS(develop, \ product, \ range, \ constraint) \ \ product(uintx, PowerArchitecturePPC64, 0, DIAGNOSTIC, \ "Specify the PowerPC family version in use. If not provided, " \ "HotSpot will determine it automatically. Host family version " \ "is the maximum value allowed (instructions are not emulated).") \ \ /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ /* indirect call by a direct call. */ \ product(bool, ReoptimizeCallSequences, true, DIAGNOSTIC, \ "Reoptimize code-sequences of calls at runtime.") \ \ /* Power 8: Configure Data Stream Control Register. */ \ product(uint64_t, DSCR_PPC64, (uint64_t)-1, \ "Power8 or later: Specify encoded value for Data Stream Control " \ "Register") \ product(uint64_t, DSCR_DPFD_PPC64, 8, \ "Power8 or later: DPFD (default prefetch depth) value of the " \ "Data Stream Control Register." \ " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ product(uint64_t, DSCR_URG_PPC64, 8, \ "Power8 or later: URG (depth attainment urgency) value of the " \ "Data Stream Control Register." \ " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ \ product(bool, UseLoadInstructionsForStackBangingPPC64, false, DIAGNOSTIC, \ "Use load instructions for stack banging.") \ \ product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, DIAGNOSTIC,\ "Use static branch prediction hints in CAS operations.") \ product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, DIAGNOSTIC,\ "Use static branch prediction hints for uncommon paths.") \ \ /* special instructions */ \ product(bool, SuperwordUseVSX, false, \ "Use VSX instructions for superword optimization.") \ \ product(bool, UseByteReverseInstructions, false, DIAGNOSTIC, \ "Use byte reverse instructions.") \ \ product(bool, UseVectorByteReverseInstructionsPPC64, false, DIAGNOSTIC, \ "Use Power9 xxbr* vector byte reverse instructions.") \ \ product(bool, UseCountLeadingZerosInstructionsPPC64, true, DIAGNOSTIC, \ "Use count leading zeros instructions.") \ \ product(bool, UseCountTrailingZerosInstructionsPPC64, false, DIAGNOSTIC, \ "Use count trailing zeros instructions.") \ \ product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, DIAGNOSTIC,\ "Use extended versions of load-and-reserve instructions.") \ \ product(bool, UseRotateAndMaskInstructionsPPC64, true, DIAGNOSTIC, \ "Use rotate and mask instructions.") \ \ /* 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, DIAGNOSTIC, \ "Raise and handle SIGTRAP if inline cache miss detected.") \ \ product(bool, TraceTraps, false, DIAGNOSTIC, \ "Trace all traps the signal handler handles.") \ \ develop(bool, ZapMemory, false, \ "Write 0x0101... to empty memory. Use this to ease debugging.") // end of ARCH_FLAGS #endif // CPU_PPC_GLOBALS_PPC_HPP