/*

 * 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_X86_VM_GLOBALDEFINITIONS_X86_HPP

#define CPU_X86_VM_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

// The expected size in bytes of a cache line, used to pad data structures.

#if defined(TIERED)

  #ifdef _LP64

    // tiered, 64-bit, large machine

    #define DEFAULT_CACHE_LINE_SIZE 128

  #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

  #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(SOLARIS) || defined(__APPLE__)

#define SUPPORT_RESERVED_STACK_AREA

#endif

#endif // CPU_X86_VM_GLOBALDEFINITIONS_X86_HPP