annotate src/cpu/ppc/vm/globals_ppc.hpp @ 5994:41b780b43b74

8029015: PPC64 (part 216): opto: trap based null and range checks Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks. Reviewed-by: kvn
author goetz
date Wed, 27 Nov 2013 16:16:21 -0800
parents b0133e4187d3
children 67fa91961822
rev   line source
goetz@5962 1 /*
goetz@5962 2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
goetz@5962 3 * Copyright 2012, 2013 SAP AG. All rights reserved.
goetz@5962 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
goetz@5962 5 *
goetz@5962 6 * This code is free software; you can redistribute it and/or modify it
goetz@5962 7 * under the terms of the GNU General Public License version 2 only, as
goetz@5962 8 * published by the Free Software Foundation.
goetz@5962 9 *
goetz@5962 10 * This code is distributed in the hope that it will be useful, but WITHOUT
goetz@5962 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
goetz@5962 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
goetz@5962 13 * version 2 for more details (a copy is included in the LICENSE file that
goetz@5962 14 * accompanied this code).
goetz@5962 15 *
goetz@5962 16 * You should have received a copy of the GNU General Public License version
goetz@5962 17 * 2 along with this work; if not, write to the Free Software Foundation,
goetz@5962 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
goetz@5962 19 *
goetz@5962 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
goetz@5962 21 * or visit www.oracle.com if you need additional information or have any
goetz@5962 22 * questions.
goetz@5962 23 *
goetz@5962 24 */
goetz@5962 25
goetz@5962 26 #ifndef CPU_PPC_VM_GLOBALS_PPC_HPP
goetz@5962 27 #define CPU_PPC_VM_GLOBALS_PPC_HPP
goetz@5962 28
goetz@5962 29 #include "utilities/globalDefinitions.hpp"
goetz@5962 30 #include "utilities/macros.hpp"
goetz@5962 31
goetz@5962 32 // Sets the default values for platform dependent flags used by the runtime system.
goetz@5962 33 // (see globals.hpp)
goetz@5962 34
goetz@5962 35 define_pd_global(bool, ConvertSleepToYield, true);
goetz@5962 36 define_pd_global(bool, ShareVtableStubs, false); // Improves performance markedly for mtrt and compress.
goetz@5962 37 define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this.
goetz@5962 38
goetz@5962 39
goetz@5962 40 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks.
goetz@5994 41 define_pd_global(bool, TrapBasedNullChecks, true);
goetz@5962 42 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast.
goetz@5962 43
goetz@5962 44 // Use large code-entry alignment.
goetz@5962 45 define_pd_global(intx, CodeEntryAlignment, 128);
goetz@5962 46 define_pd_global(intx, OptoLoopAlignment, 16);
goetz@5962 47 define_pd_global(intx, InlineFrequencyCount, 100);
goetz@5962 48 define_pd_global(intx, InlineSmallCode, 1500);
goetz@5962 49
goetz@5962 50 define_pd_global(intx, PreInflateSpin, 10);
goetz@5962 51
goetz@5962 52 // Flags for template interpreter.
goetz@5962 53 define_pd_global(bool, RewriteBytecodes, true);
goetz@5962 54 define_pd_global(bool, RewriteFrequentPairs, true);
goetz@5962 55
goetz@5962 56 define_pd_global(bool, UseMembar, false);
goetz@5962 57
goetz@5962 58 // GC Ergo Flags
goetz@5977 59 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread.
goetz@5962 60
goetz@5979 61 define_pd_global(uintx, TypeProfileLevel, 0);
goetz@5962 62
goetz@5962 63 // Platform dependent flag handling: flags only defined on this platform.
goetz@5962 64 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
goetz@5962 65 product(uintx, PowerArchitecturePPC64, 0, \
goetz@5962 66 "CPU Version: x for PowerX. Currently recognizes Power5 to " \
goetz@5962 67 "Power7. Default is 0. CPUs newer than Power7 will be " \
goetz@5962 68 "recognized as Power7.") \
goetz@5962 69 \
goetz@5962 70 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \
goetz@5962 71 /* indirect call by a direct call. */ \
goetz@5962 72 product(bool, ReoptimizeCallSequences, true, \
goetz@5962 73 "Reoptimize code-sequences of calls at runtime.") \
goetz@5962 74 \
goetz@5962 75 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \
goetz@5962 76 "Use load instructions for stack banging.") \
goetz@5962 77 \
goetz@5962 78 /* special instructions */ \
goetz@5962 79 \
goetz@5962 80 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \
goetz@5962 81 "Use count leading zeros instructions.") \
goetz@5962 82 \
goetz@5962 83 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \
goetz@5962 84 "Use extended versions of load-and-reserve instructions.") \
goetz@5962 85 \
goetz@5962 86 product(bool, UseRotateAndMaskInstructionsPPC64, true, \
goetz@5962 87 "Use rotate and mask instructions.") \
goetz@5962 88 \
goetz@5962 89 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \
goetz@5962 90 "Use static branch prediction hints in CAS operations.") \
goetz@5962 91 \
goetz@5962 92 /* Trap based checks. */ \
goetz@5962 93 /* Trap based checks use the ppc trap instructions to check certain */ \
goetz@5962 94 /* conditions. This instruction raises a SIGTRAP caught by the */ \
goetz@5962 95 /* exception handler of the VM. */ \
goetz@5990 96 product(bool, UseSIGTRAP, true, \
goetz@5962 97 "Allow trap instructions that make use of SIGTRAP. Use this to " \
goetz@5962 98 "switch off all optimizations requiring SIGTRAP.") \
goetz@5962 99 product(bool, TrapBasedICMissChecks, true, \
goetz@5962 100 "Raise and handle SIGTRAP if inline cache miss detected.") \
goetz@5962 101 product(bool, TrapBasedNotEntrantChecks, true, \
goetz@5962 102 "Raise and handle SIGTRAP if calling not entrant or zombie" \
goetz@5962 103 " method.") \
goetz@5962 104 product(bool, TraceTraps, false, "Trace all traps the signal handler" \
goetz@5962 105 "handles.") \
goetz@5962 106 \
goetz@5962 107 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \
goetz@5962 108 " Use this to ease debugging.") \
goetz@5962 109
goetz@5962 110
goetz@5962 111
goetz@5962 112 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP