/*
    This file is a part of libcds - Concurrent Data Structures library

    (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2016

    Source code repo: http://github.com/khizmax/libcds/
    Download: http://sourceforge.net/projects/libcds/files/
    
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this
      list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.     
*/

#ifndef CDSLIB_COMPILER_GCC_IA64_CXX11_ATOMIC_H
#define CDSLIB_COMPILER_GCC_IA64_CXX11_ATOMIC_H

/*
    Source:
        1. load/store: http://www.decadent.org.uk/pipermail/cpp-threads/2008-December/001932.html
        2. Mapping to C++ Memory Model: http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html
*/

#include <cstdint>

//@cond
namespace cds { namespace cxx11_atomic {
    namespace platform { CDS_CXX11_INLINE_NAMESPACE namespace gcc { CDS_CXX11_INLINE_NAMESPACE namespace ia64 {

        static inline void itanium_full_fence() CDS_NOEXCEPT
        {
            __asm__ __volatile__ ( "mf \n\t" ::: "memory" );
        }

        static inline void fence_before( memory_order order ) CDS_NOEXCEPT
        {
            switch(order) {
            case memory_order_relaxed:
            case memory_order_consume:
            case memory_order_acquire:
                break;
            case memory_order_release:
            case memory_order_acq_rel:
                CDS_COMPILER_RW_BARRIER;
                break;
            case memory_order_seq_cst:
                itanium_full_fence();
                break;
            }
        }

        static inline void fence_after( memory_order order ) CDS_NOEXCEPT
        {
            switch(order) {
            case memory_order_acquire:
            case memory_order_acq_rel:
                CDS_COMPILER_RW_BARRIER;
                break;
            case memory_order_relaxed:
            case memory_order_consume:
            case memory_order_release:
                break;
            case memory_order_seq_cst:
                itanium_full_fence();
                break;
            }
        }


        //-----------------------------------------------------------------------------
        // fences
        //-----------------------------------------------------------------------------
        static inline void thread_fence(memory_order order) CDS_NOEXCEPT
        {
            switch(order)
            {
                case memory_order_relaxed:
                case memory_order_consume:
                    break;
                case memory_order_release:
                case memory_order_acquire:
                case memory_order_acq_rel:
                    CDS_COMPILER_RW_BARRIER;
                    break;
                case memory_order_seq_cst:
                    itanium_full_fence();
                    break;
                default:;
            }
        }

        static inline void signal_fence(memory_order order) CDS_NOEXCEPT
        {
            // C++11: 29.8.8: only compiler optimization, no hardware instructions
            switch(order)
            {
                case memory_order_relaxed:
                    break;
                case memory_order_consume:
                case memory_order_release:
                case memory_order_acquire:
                case memory_order_acq_rel:
                case memory_order_seq_cst:
                    CDS_COMPILER_RW_BARRIER;
                    break;
                default:;
            }
        }

#define CDS_ITANIUM_ATOMIC_LOAD( n_bytes, n_bits )   \
        template <typename T>   \
        static inline T load##n_bits( T volatile const * pSrc, memory_order order ) CDS_NOEXCEPT \
        { \
            static_assert( sizeof(T) == n_bytes, "Illegal size of operand" )   ; \
            assert( order ==  memory_order_relaxed \
                || order ==  memory_order_consume  \
                || order ==  memory_order_acquire  \
                || order == memory_order_seq_cst   \
                ) ; \
            assert( pSrc )  ; \
            T val    ; \
            __asm__ __volatile__ ( \
                "ld" #n_bytes ".acq %[val] = [%[pSrc]]  \n\t" \
                : [val] "=r" (val) \
                : [pSrc] "r" (pSrc) \
                : "memory" \
                ) ; \
            return val ; \
        }

#define CDS_ITANIUM_ATOMIC_STORE( n_bytes, n_bits ) \
        template <typename T> \
        static inline void store##n_bits( T volatile * pDest, T val, memory_order order ) CDS_NOEXCEPT \
        { \
            static_assert( sizeof(T) == n_bytes, "Illegal size of operand" )   ; \
            assert( order ==  memory_order_relaxed \
                || order ==  memory_order_release  \
                || order == memory_order_seq_cst   \
                ) ; \
            assert( pDest )  ; \
            if ( order == memory_order_seq_cst ) { \
                __asm__ __volatile__ ( \
                    "st" #n_bytes ".rel [%[pDest]] = %[val] \n\t" \
                    "mf     \n\t" \
                    :: [pDest] "r" (pDest), [val] "r" (val) \
                    : "memory" \
                    ) ; \
            } \
            else { \
                __asm__ __volatile__ ( \
                    "st" #n_bytes ".rel [%[pDest]] = %[val] \n\t" \
                    :: [pDest] "r" (pDest), [val] "r" (val) \
                    : "memory" \
                    ) ; \
                fence_after(order) ; \
            } \
        }

#define CDS_ITANIUM_ATOMIC_CAS( n_bytes, n_bits ) \
        template <typename T> \
        static inline bool cas##n_bits##_strong( T volatile * pDest, T& expected, T desired, memory_order mo_success, memory_order /*mo_fail*/ ) CDS_NOEXCEPT \
        { \
            static_assert( sizeof(T) == n_bytes, "Illegal size of operand" )   ; \
            T current ; \
            switch(mo_success) { \
            case memory_order_relaxed: \
            case memory_order_consume: \
            case memory_order_acquire: \
                __asm__ __volatile__ ( \
                    "mov ar.ccv = %[expected] ;;\n\t" \
                    "cmpxchg" #n_bytes ".acq %[current] = [%[pDest]], %[desired], ar.ccv\n\t" \
                    : [current] "=r" (current) \
                    : [pDest] "r" (pDest), [expected] "r" (expected), [desired] "r" (desired) \
                    : "ar.ccv", "memory" \
                    ); \
                break ; \
            case memory_order_release: \
                __asm__ __volatile__ ( \
                    "mov ar.ccv = %[expected] ;;\n\t" \
                    "cmpxchg" #n_bytes ".rel %[current] = [%[pDest]], %[desired], ar.ccv\n\t" \
                    : [current] "=r" (current) \
                    : [pDest] "r" (pDest), [expected] "r" (expected), [desired] "r" (desired) \
                    : "ar.ccv", "memory" \
                    ); \
                break ; \
            case memory_order_acq_rel: \
            case memory_order_seq_cst: \
                __asm__ __volatile__ ( \
                    "mov ar.ccv = %[expected] ;;\n\t" \
                    "cmpxchg" #n_bytes ".rel %[current] = [%[pDest]], %[desired], ar.ccv\n\t" \
                    "mf \n\t" \
                    : [current] "=r" (current) \
                    : [pDest] "r" (pDest), [expected] "r" (expected), [desired] "r" (desired) \
                    : "ar.ccv", "memory" \
                    ); \
                break; \
            default: \
                assert(false); \
            } \
            bool bSuccess = expected == current ; \
            expected = current ; \
            return bSuccess ; \
        } \
        template <typename T> \
        static inline bool cas##n_bits##_weak( T volatile * pDest, T& expected, T desired, memory_order mo_success, memory_order mo_fail ) CDS_NOEXCEPT \
        { return cas##n_bits##_strong( pDest, expected, desired, mo_success, mo_fail ); }

        // xchg is performed with acquire semantics
#define CDS_ITANIUM_ATOMIC_EXCHANGE( n_bytes, n_bits ) \
        template <typename T> \
        static inline T exchange##n_bits( T volatile * pDest, T val, memory_order order ) CDS_NOEXCEPT \
        { \
            static_assert( sizeof(T) == n_bytes, "Illegal size of operand" )   ; \
            assert( pDest ) ; \
            T current ; \
            switch(order) \
            { \
            case memory_order_relaxed: \
            case memory_order_consume: \
            case memory_order_acquire: \
                __asm__ __volatile__ ( \
                    "xchg" #n_bytes " %[current] = [%[pDest]], %[val]\n\t" \
                    : [current] "=r" (current) \
                    : [pDest] "r" (pDest), [val] "r" (val) \
                    : "memory" \
                    ); \
                break; \
            case memory_order_acq_rel: \
            case memory_order_release: \
            case memory_order_seq_cst: \
                __asm__ __volatile__ ( \
                    "mf \n\t" \
                    "xchg" #n_bytes " %[current] = [%[pDest]], %[val]\n\t" \
                    : [current] "=r" (current) \
                    : [pDest] "r" (pDest), [val] "r" (val) \
                    : "memory" \
                    ); \
                break; \
            default: assert(false); \
            } \
            return current ; \
        }

#define CDS_ITANIUM_ATOMIC_FETCH_ADD( n_bytes, n_add )  \
        switch (order) { \
            case memory_order_relaxed: \
            case memory_order_consume: \
            case memory_order_acquire: \
                __asm__ __volatile__ ( \
                    "fetchadd" #n_bytes ".acq %[cur] = [%[pDest]], " #n_add " \n\t" \
                    : [cur] "=r" (cur) \
                    : [pDest] "r" (pDest) \
                    : "memory" \
                    ); \
                break ; \
            case memory_order_release: \
                __asm__ __volatile__ ( \
                    "fetchadd" #n_bytes ".rel %[cur] = [%[pDest]], " #n_add " \n\t" \
                    : [cur] "=r" (cur) \
                    : [pDest] "r" (pDest) \
                    : "memory" \
                    ); \
                break ; \
            case memory_order_acq_rel: \
            case memory_order_seq_cst: \
                __asm__ __volatile__ ( \
                    "fetchadd" #n_bytes ".rel %[cur] = [%[pDest]], " #n_add " \n\t" \
                    "mf \n\t" \
                    : [cur] "=r" (cur) \
                    : [pDest] "r" (pDest) \
                    : "memory" \
                    ); \
                break ; \
            default: \
                assert(false); \
        }

        //-----------------------------------------------------------------------------
        // 8bit primitives
        //-----------------------------------------------------------------------------

        CDS_ITANIUM_ATOMIC_LOAD( 1, 8 )
        CDS_ITANIUM_ATOMIC_STORE( 1, 8 )
        CDS_ITANIUM_ATOMIC_CAS( 1, 8 )
        CDS_ITANIUM_ATOMIC_EXCHANGE( 1, 8 )

        //-----------------------------------------------------------------------------
        // 16bit primitives
        //-----------------------------------------------------------------------------

        CDS_ITANIUM_ATOMIC_LOAD( 2, 16 )
        CDS_ITANIUM_ATOMIC_STORE( 2, 16 )
        CDS_ITANIUM_ATOMIC_CAS( 2, 16 )
        CDS_ITANIUM_ATOMIC_EXCHANGE( 2, 16 )

        //-----------------------------------------------------------------------------
        // 32bit primitives
        //-----------------------------------------------------------------------------

        CDS_ITANIUM_ATOMIC_LOAD( 4, 32 )
        CDS_ITANIUM_ATOMIC_STORE( 4, 32 )
        CDS_ITANIUM_ATOMIC_CAS( 4, 32 )
        CDS_ITANIUM_ATOMIC_EXCHANGE( 4, 32 )

#       define CDS_ATOMIC_fetch32_add_defined
        template <typename T>
        static inline T fetch32_add( T volatile * pDest, T val, memory_order order) CDS_NOEXCEPT
        {
            static_assert( sizeof(T) == 4, "Illegal size of operand" );
            assert( pDest );

            T cur;
            switch ( val ) {
                case 1:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, 1 );
                    break;
                case 4:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, 4 );
                    break;
                case 8:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, 8 );
                    break;
                case 16:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, 16 );
                    break;
                default:
                    cur = load32( pDest, memory_order_relaxed );
                    do {} while ( !cas32_strong( pDest, cur, cur + val, order, memory_order_relaxed ));
                    break;
            }
            return cur;
        }

#       define CDS_ATOMIC_fetch32_sub_defined
        template <typename T>
        static inline T fetch32_sub( T volatile * pDest, T val, memory_order order) CDS_NOEXCEPT
        {
            static_assert( sizeof(T) == 4, "Illegal size of operand" );
            assert( pDest );
            T cur;
            switch ( val ) {
                case 1:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, -1 );
                    break;
                case 4:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, -4 );
                    break;
                case 8:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, -8 );
                    break;
                case 16:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 4, -16 );
                    break;
                default:
                    cur = load32( pDest, memory_order_relaxed );
                    do {} while ( !cas32_strong( pDest, cur, cur - val, order, memory_order_relaxed ));
                    break;
            }
            return cur;
        }

        //-----------------------------------------------------------------------------
        // 64bit primitives
        //-----------------------------------------------------------------------------

        CDS_ITANIUM_ATOMIC_LOAD( 8, 64 )
        CDS_ITANIUM_ATOMIC_STORE( 8, 64 )
        CDS_ITANIUM_ATOMIC_CAS( 8, 64 )
        CDS_ITANIUM_ATOMIC_EXCHANGE( 8, 64 )

#       define CDS_ATOMIC_fetch64_add_defined
        template <typename T>
        static inline T fetch64_add( T volatile * pDest, T val, memory_order order) CDS_NOEXCEPT
        {
            static_assert( sizeof(T) == 8, "Illegal size of operand" );
            assert( pDest );

            T cur;
            switch ( val ) {
                case 1:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 1 );
                    break;
                case 4:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 4 );
                    break;
                case 8:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 8 );
                    break;
                case 16:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 16 );
                    break;
                default:
                    cur = load64( pDest, memory_order_relaxed );
                    do {} while ( !cas64_strong( pDest, cur, cur + val, order, memory_order_relaxed ));
                    break;
            }
            return cur;
        }

#       define CDS_ATOMIC_fetch64_sub_defined
        template <typename T>
        static inline T fetch64_sub( T volatile * pDest, T val, memory_order order) CDS_NOEXCEPT
        {
            static_assert( sizeof(T) == 8, "Illegal size of operand" );
            assert( pDest );
            T cur;
            switch ( val ) {
                case 1:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -1 );
                    break;
                case 4:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -4 );
                    break;
                case 8:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -8 );
                    break;
                case 16:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -16 );
                    break;
                default:
                    cur = load64( pDest, memory_order_relaxed );
                    do {} while ( !cas64_strong( pDest, cur, cur - val, order, memory_order_relaxed ));
                    break;
            }
            return cur;
        }

        //-----------------------------------------------------------------------------
        // pointer primitives
        //-----------------------------------------------------------------------------
        template <typename T>
        static inline T * load_ptr( T * volatile const * pSrc, memory_order order ) CDS_NOEXCEPT
        {
            assert( order ==  memory_order_relaxed
                 || order ==  memory_order_consume
                 || order ==  memory_order_acquire
                 || order == memory_order_seq_cst
            );
            assert( pSrc );
            T * val;
            __asm__ __volatile__ (
                "ld8.acq %[val] = [%[pSrc]]  \n\t"
                : [val] "=r" (val)
                : [pSrc] "r" (pSrc)
                : "memory"
            );
            return val;
        }

        template <typename T>
        static inline void store_ptr( T * volatile * pDest, T * val, memory_order order ) CDS_NOEXCEPT
        {
            assert( order ==  memory_order_relaxed
                 || order ==  memory_order_release
                 || order == memory_order_seq_cst
            );
            assert( pDest );

            if ( order == memory_order_seq_cst ) {
                __asm__ __volatile__ (
                    "st8.rel [%[pDest]] = %[val] \n\t"
                    "mf     \n\t"
                    :: [pDest] "r" (pDest), [val] "r" (val)
                    : "memory"
                );
            }
            else {
                __asm__ __volatile__ (
                    "st8.rel [%[pDest]] = %[val] \n\t"
                    :: [pDest] "r" (pDest), [val] "r" (val)
                    : "memory"
                );
                fence_after(order);
            }
        }

        template <typename T>
        static inline bool cas_ptr_strong( T * volatile * pDest, T *& expected, T * desired, memory_order mo_success, memory_order mo_fail ) CDS_NOEXCEPT
        {
            static_assert( sizeof(T *) == 8, "Illegal size of operand" );
            assert( pDest );

            T * current;

            switch(mo_success) {
            case memory_order_relaxed:
            case memory_order_consume:
            case memory_order_acquire:
                __asm__ __volatile__ (
                    "mov ar.ccv = %[expected] ;;\n\t"
                    "cmpxchg8.acq %[current] = [%[pDest]], %[desired], ar.ccv\n\t"
                    : [current] "=r" (current)
                    : [pDest] "r" (pDest), [expected] "r" (expected), [desired] "r" (desired)
                    : "ar.ccv", "memory"
                );
                break;
            case memory_order_release:
               __asm__ __volatile__ (
                   "mov ar.ccv = %[expected] ;;\n\t"
                   "cmpxchg8.rel %[current] = [%[pDest]], %[desired], ar.ccv\n\t"
                   : [current] "=r" (current)
                   : [pDest] "r" (pDest), [expected] "r" (expected), [desired] "r" (desired)
                   : "ar.ccv", "memory"
               );
               break;
            case memory_order_acq_rel:
            case memory_order_seq_cst:
               __asm__ __volatile__ (
                   "mov ar.ccv = %[expected] ;;\n\t"
                   "cmpxchg8.rel %[current] = [%[pDest]], %[desired], ar.ccv\n\t"
                   "mf \n\t"
                   : [current] "=r" (current)
                   : [pDest] "r" (pDest), [expected] "r" (expected), [desired] "r" (desired)
                   : "ar.ccv", "memory"
               );
               break;
            default:
                assert(false);
            }

            bool bSuccess = expected == current;
            expected = current;
            if ( !bSuccess )
                fence_after( mo_fail );
            return bSuccess;
        }

        template <typename T>
        static inline bool cas_ptr_weak( T * volatile * pDest, T *& expected, T * desired, memory_order mo_success, memory_order mo_fail ) CDS_NOEXCEPT
        {
            return cas_ptr_strong( pDest, expected, desired, mo_success, mo_fail );
        }

        template <typename T>
        static inline T * exchange_ptr( T * volatile * pDest, T * val, memory_order order ) CDS_NOEXCEPT
        {
            static_assert( sizeof(T *) == 8, "Illegal size of operand" );
            assert( pDest );

            T * current;
            switch(order) {
                case memory_order_relaxed:
                case memory_order_consume:
                case memory_order_acquire:
                    __asm__ __volatile__ (
                        "xchg8 %[current] = [%[pDest]], %[val]\n\t"
                        : [current] "=r" (current)
                        : [pDest] "r" (pDest), [val] "r" (val)
                        : "memory"
                    );
                    break;
                case memory_order_acq_rel:
                case memory_order_release:
                case memory_order_seq_cst:
                    __asm__ __volatile__ (
                        "mf \n\t"
                        "xchg8 %[current] = [%[pDest]], %[val]\n\t"
                        : [current] "=r" (current)
                        : [pDest] "r" (pDest), [val] "r" (val)
                        : "memory"
                    );
                    break;
                default: assert(false);
            }
            return current;
        }


        template <typename T> struct atomic_pointer_sizeof { enum { value = sizeof(T) }; };
        template <> struct atomic_pointer_sizeof<void> { enum { value = 1 }; };

        // It does not work properly
        // atomic.fetch_add( ... ) returns nullptr, why?..
//#       define CDS_ATOMIC_fetch_ptr_add_defined
        template <typename T>
        static inline T * fetch_ptr_add( T * volatile * pDest, ptrdiff_t val, memory_order order) CDS_NOEXCEPT
        {
            static_assert( sizeof(T *) == 8, "Illegal size of operand" );
            assert( pDest );

            T * cur;
            val *= atomic_pointer_sizeof<T>::value;
            switch ( val ) {
                case 1:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 1 );
                    break;
                case 4:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 4 );
                    break;
                case 8:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 8 );
                    break;
                case 16:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, 16 );
                    break;
                default:
                    cur = load_ptr( pDest, memory_order_relaxed );
                    do {} while ( !cas_ptr_strong( pDest, cur, reinterpret_cast<T *>(reinterpret_cast<uint8_t *>(cur) + val), order, memory_order_relaxed ));
                    break;
            }
            return cur;
        }

        // It does not work properly
        // atomic.fetch_sub( ... ) returns nullptr, why?..
//#       define CDS_ATOMIC_fetch_ptr_sub_defined
        template <typename T>
        static inline T * fetch_ptr_sub( T * volatile * pDest, ptrdiff_t val, memory_order order) CDS_NOEXCEPT
        {
            static_assert( sizeof(T *) == 8, "Illegal size of operand" );
            assert( pDest );
            T * cur;
            val *= atomic_pointer_sizeof<T>::value;
            switch ( val ) {
                case 1:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -1 );
                    break;
                case 4:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -4 );
                    break;
                case 8:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -8 );
                    break;
                case 16:
                    CDS_ITANIUM_ATOMIC_FETCH_ADD( 8, -16 );
                    break;
                default:
                    cur = load_ptr( pDest, memory_order_relaxed );
                    do {} while ( !cas_ptr_strong( pDest, cur, reinterpret_cast<T *>(reinterpret_cast<uint8_t *>(cur) - val), order, memory_order_relaxed ));
                    break;
            }
            return cur;
        }

        //-----------------------------------------------------------------------------
        // atomic flag primitives
        //-----------------------------------------------------------------------------

        typedef bool atomic_flag_type;
        static inline bool atomic_flag_tas( atomic_flag_type volatile * pFlag, memory_order order ) CDS_NOEXCEPT
        {
            return exchange8( pFlag, true, order );
        }

        static inline void atomic_flag_clear( atomic_flag_type volatile * pFlag, memory_order order ) CDS_NOEXCEPT
        {
            store8( pFlag, false, order );
        }

#undef CDS_ITANIUM_ATOMIC_LOAD
#undef CDS_ITANIUM_ATOMIC_STORE
#undef CDS_ITANIUM_ATOMIC_CAS
#undef CDS_ITANIUM_ATOMIC_EXCHANGE
#undef CDS_ITANIUM_ATOMIC_FETCH_ADD

    }} // namespace gcc::ia64

#ifndef CDS_CXX11_INLINE_NAMESPACE_SUPPORT
    using namespace gcc::ia64;
#endif
    }   // namespace platform
}}  // namespace cds::cxx11_atomic
//@endcond

#endif // #ifndef CDSLIB_COMPILER_GCC_IA64_CXX11_ATOMIC_H
