Quelle globalDefinitions_x86.hpp Sprache: C

/*
* Copyright (c) 1999, 2021, 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.
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#ifndef CPU_X86_GLOBALDEFINITIONS_X86_HPP
#define CPU_X86_GLOBALDEFINITIONS_X86_HPP

const int StackAlignmentInBytes  = 16;

// Indicates whether the C calling conventions require that
// 32-bit integer argument values are extended to 64 bits.
const bool CCallingConventionRequiresIntsAsLongs = false;

#define SUPPORTS_NATIVE_CX8

#define SUPPORT_MONITOR_COUNT

#define CPU_MULTI_COPY_ATOMIC

// The expected size in bytes of a cache line, used to pad data structures.
#if COMPILER1_AND_COMPILER2
  #ifdef _LP64
    // tiered, 64-bit, large machine
    #define DEFAULT_CACHE_LINE_SIZE 128
    #define OM_CACHE_LINE_SIZE 64
  #else
    // tiered, 32-bit, medium machine
    #define DEFAULT_CACHE_LINE_SIZE 64
  #endif
#elif defined(COMPILER1)
  // pure C1, 32-bit, small machine
  // i486 was the last Intel chip with 16-byte cache line size
  #define DEFAULT_CACHE_LINE_SIZE 32
#elif defined(COMPILER2)
  #ifdef _LP64
    // pure C2, 64-bit, large machine
    #define DEFAULT_CACHE_LINE_SIZE 128
    #define OM_CACHE_LINE_SIZE 64
  #else
    // pure C2, 32-bit, medium machine
    #define DEFAULT_CACHE_LINE_SIZE 64
  #endif
#endif

#if defined(COMPILER2)
// Include Restricted Transactional Memory lock eliding optimization
#define INCLUDE_RTM_OPT 1
#endif

#if defined(LINUX) || defined(__APPLE__)
#define SUPPORT_RESERVED_STACK_AREA
#endif

#if INCLUDE_JVMCI
#define COMPRESSED_CLASS_POINTERS_DEPENDS_ON_COMPRESSED_OOPS EnableJVMCI
#else
#define COMPRESSED_CLASS_POINTERS_DEPENDS_ON_COMPRESSED_OOPS false
#endif

#define USE_POINTERS_TO_REGISTER_IMPL_ARRAY

#endif // CPU_X86_GLOBALDEFINITIONS_X86_HPP

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