hotspot/src/cpu/x86/vm/globalDefinitions_x86.hpp
author goetz
Mon, 13 Apr 2015 18:49:59 -0700
changeset 30221 70dab4a0cd45
parent 27165 785a8d56024c
child 31590 427d073af867
permissions -rw-r--r--
8077618: Move rtmLocking.cpp to shared directory. Reviewed-by: dholmes, kvn

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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#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 properly extended to 64 bits.
// If set, SharedRuntime::c_calling_convention() must adapt
// signatures accordingly.
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) || defined(SHARK)
  #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) && !defined(JAVASE_EMBEDDED)
// Include Restricted Transactional Memory lock eliding optimization
#define INCLUDE_RTM_OPT 1
#endif

#endif // CPU_X86_VM_GLOBALDEFINITIONS_X86_HPP