src/hotspot/cpu/ppc/globalDefinitions_ppc.hpp
author mdoerr
Wed, 10 Jan 2018 11:09:55 +0100
changeset 48506 478e77658965
parent 48332 651a95f30dfb
child 53244 9807daeb47c4
permissions -rw-r--r--
8194258: PPC64 safepoint mechanism: Fix initialization on AIX and support SIGTRAP Summary: Use mmap on AIX to allocate protected page. Use trap instructions for polling if UseSIGTRAP is enabled. Reviewed-by: rehn, goetz

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#ifndef CPU_PPC_VM_GLOBALDEFINITIONS_PPC_HPP
#define CPU_PPC_VM_GLOBALDEFINITIONS_PPC_HPP

#ifdef CC_INTERP
#error "CC_INTERP is no longer supported. Removed in change 8145117."
#endif

// Size of PPC Instructions
const int BytesPerInstWord = 4;

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 = true;

#define SUPPORTS_NATIVE_CX8

// The PPC CPUs are NOT multiple-copy-atomic.
#define CPU_NOT_MULTIPLE_COPY_ATOMIC

// The expected size in bytes of a cache line, used to pad data structures.
#define DEFAULT_CACHE_LINE_SIZE 128

#if defined(COMPILER2) && (defined(AIX) || defined(LINUX))
// Include Transactional Memory lock eliding optimization
#define INCLUDE_RTM_OPT 1
#endif

#define SUPPORT_RESERVED_STACK_AREA

#define THREAD_LOCAL_POLL
// If UseSIGTRAP is active, we only use the poll bit and no polling page.
// Otherwise, we fall back to usage of the polling page in nmethods.
// Define the condition to use this -XX flag.
#define USE_POLL_BIT_ONLY UseSIGTRAP

#endif // CPU_PPC_VM_GLOBALDEFINITIONS_PPC_HPP