1 /* 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_X86_VM_GLOBALS_X86_HPP 26 #define CPU_X86_VM_GLOBALS_X86_HPP 27 28 #include "utilities/globalDefinitions.hpp" 29 #include "utilities/macros.hpp" 30 31 // Sets the default values for platform dependent flags used by the runtime system. 32 // (see globals.hpp) 33 34 define_pd_global(bool, ConvertSleepToYield, true); 35 define_pd_global(bool, ShareVtableStubs, true); 36 define_pd_global(bool, CountInterpCalls, true); 37 define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this 38 39 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 40 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast 41 42 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't 43 // assign a different value for C2 without touching a number of files. Use 44 // #ifdef to minimize the change as it's late in Mantis. -- FIXME. 45 // c1 doesn't have this problem because the fix to 4858033 assures us 46 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns 47 // the uep and the vep doesn't get real alignment but just slops on by 48 // only assured that the entry instruction meets the 5 byte size requirement. 49 #ifdef COMPILER2 50 define_pd_global(intx, CodeEntryAlignment, 32); 51 #else 52 define_pd_global(intx, CodeEntryAlignment, 16); 53 #endif // COMPILER2 54 define_pd_global(intx, OptoLoopAlignment, 16); 55 define_pd_global(intx, InlineFrequencyCount, 100); 56 define_pd_global(intx, InlineSmallCode, 1000); 57 58 define_pd_global(intx, StackYellowPages, NOT_WINDOWS(2) WINDOWS_ONLY(3)); 59 define_pd_global(intx, StackRedPages, 1); 60 #ifdef AMD64 61 // Very large C++ stack frames using solaris-amd64 optimized builds 62 // due to lack of optimization caused by C++ compiler bugs 63 define_pd_global(intx, StackShadowPages, NOT_WIN64(20) WIN64_ONLY(6) DEBUG_ONLY(+2)); 64 #else 65 define_pd_global(intx, StackShadowPages, 4 DEBUG_ONLY(+5)); 66 #endif // AMD64 67 68 define_pd_global(intx, PreInflateSpin, 10); 69 70 define_pd_global(bool, RewriteBytecodes, true); 71 define_pd_global(bool, RewriteFrequentPairs, true); 72 73 #ifdef _ALLBSD_SOURCE 74 define_pd_global(bool, UseMembar, true); 75 #else 76 define_pd_global(bool, UseMembar, false); 77 #endif 78 79 // GC Ergo Flags 80 define_pd_global(uintx, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 81 82 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ 83 \ 84 develop(bool, IEEEPrecision, true, \ 85 "Enables IEEE precision (for INTEL only)") \ 86 \ 87 product(intx, FenceInstruction, 0, \ 88 "(Unsafe,Unstable) Experimental") \ 89 \ 90 product(intx, ReadPrefetchInstr, 0, \ 91 "Prefetch instruction to prefetch ahead") \ 92 \ 93 product(bool, UseStoreImmI16, true, \ 94 "Use store immediate 16-bits value instruction on x86") \ 95 \ 96 product(intx, UseAVX, 99, \ 97 "Highest supported AVX instructions set on x86/x64") \ 98 \ 99 product(bool, UseCLMUL, false, \ 100 "Control whether CLMUL instructions can be used on x86/x64") \ 101 \ 102 diagnostic(bool, UseIncDec, true, \ 103 "Use INC, DEC instructions on x86") \ 104 \ 105 product(bool, UseNewLongLShift, false, \ 106 "Use optimized bitwise shift left") \ 107 \ 108 product(bool, UseAddressNop, false, \ 109 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 110 \ 111 product(bool, UseXmmLoadAndClearUpper, true, \ 112 "Load low part of XMM register and clear upper part") \ 113 \ 114 product(bool, UseXmmRegToRegMoveAll, false, \ 115 "Copy all XMM register bits when moving value between registers") \ 116 \ 117 product(bool, UseXmmI2D, false, \ 118 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 119 \ 120 product(bool, UseXmmI2F, false, \ 121 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 122 \ 123 product(bool, UseUnalignedLoadStores, false, \ 124 "Use SSE2 MOVDQU instruction for Arraycopy") \ 125 \ 126 product(bool, UseFastStosb, false, \ 127 "Use fast-string operation for zeroing: rep stosb") \ 128 \ 129 /* assembler */ \ 130 product(bool, Use486InstrsOnly, false, \ 131 "Use 80486 Compliant instruction subset") \ 132 \ 133 product(bool, UseCountLeadingZerosInstruction, false, \ 134 "Use count leading zeros instruction") \ 135 136 #endif // CPU_X86_VM_GLOBALS_X86_HPP