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Current File : //etc/alternatives/mpi/openmpi/opal/sys/gcc_builtin/atomic.h /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2013 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2011 Sandia National Laboratories. All rights reserved.
* Copyright (c) 2014-2017 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2016-2017 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2018 Triad National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef OPAL_SYS_ARCH_ATOMIC_H
#define OPAL_SYS_ARCH_ATOMIC_H 1
/**********************************************************************
*
* Memory Barriers
*
*********************************************************************/
#define OPAL_HAVE_ATOMIC_MEM_BARRIER 1
#define OPAL_HAVE_ATOMIC_MATH_32 1
#define OPAL_HAVE_ATOMIC_COMPARE_EXCHANGE_32 1
#define OPAL_HAVE_ATOMIC_ADD_32 1
#define OPAL_HAVE_ATOMIC_AND_32 1
#define OPAL_HAVE_ATOMIC_OR_32 1
#define OPAL_HAVE_ATOMIC_XOR_32 1
#define OPAL_HAVE_ATOMIC_SUB_32 1
#define OPAL_HAVE_ATOMIC_SWAP_32 1
#define OPAL_HAVE_ATOMIC_MATH_64 1
#define OPAL_HAVE_ATOMIC_COMPARE_EXCHANGE_64 1
#define OPAL_HAVE_ATOMIC_ADD_64 1
#define OPAL_HAVE_ATOMIC_AND_64 1
#define OPAL_HAVE_ATOMIC_OR_64 1
#define OPAL_HAVE_ATOMIC_XOR_64 1
#define OPAL_HAVE_ATOMIC_SUB_64 1
#define OPAL_HAVE_ATOMIC_SWAP_64 1
static inline void opal_atomic_mb(void)
{
__atomic_thread_fence (__ATOMIC_SEQ_CST);
}
static inline void opal_atomic_rmb(void)
{
#if OPAL_ASSEMBLY_ARCH == OPAL_X86_64
/* work around a bug in older gcc versions where ACQUIRE seems to get
* treated as a no-op instead of being equivalent to
* __asm__ __volatile__("": : :"memory") */
__atomic_thread_fence (__ATOMIC_SEQ_CST);
#else
__atomic_thread_fence (__ATOMIC_ACQUIRE);
#endif
}
static inline void opal_atomic_wmb(void)
{
__atomic_thread_fence (__ATOMIC_RELEASE);
}
#define MB() opal_atomic_mb()
/**********************************************************************
*
* Atomic math operations
*
*********************************************************************/
/*
* Suppress numerous (spurious ?) warnings from Oracle Studio compilers
* see https://community.oracle.com/thread/3968347
*/
#if defined(__SUNPRO_C) || defined(__SUNPRO_CC)
#pragma error_messages(off, E_ARG_INCOMPATIBLE_WITH_ARG_L)
#endif
static inline bool opal_atomic_compare_exchange_strong_acq_32 (volatile int32_t *addr, int32_t *oldval, int32_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
static inline bool opal_atomic_compare_exchange_strong_rel_32 (volatile int32_t *addr, int32_t *oldval, int32_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
}
static inline bool opal_atomic_compare_exchange_strong_32 (volatile int32_t *addr, int32_t *oldval, int32_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
static inline int32_t opal_atomic_swap_32 (volatile int32_t *addr, int32_t newval)
{
int32_t oldval;
__atomic_exchange (addr, &newval, &oldval, __ATOMIC_RELAXED);
return oldval;
}
static inline int32_t opal_atomic_fetch_add_32(volatile int32_t *addr, int32_t delta)
{
return __atomic_fetch_add (addr, delta, __ATOMIC_RELAXED);
}
static inline int32_t opal_atomic_fetch_and_32(volatile int32_t *addr, int32_t value)
{
return __atomic_fetch_and (addr, value, __ATOMIC_RELAXED);
}
static inline int32_t opal_atomic_fetch_or_32(volatile int32_t *addr, int32_t value)
{
return __atomic_fetch_or (addr, value, __ATOMIC_RELAXED);
}
static inline int32_t opal_atomic_fetch_xor_32(volatile int32_t *addr, int32_t value)
{
return __atomic_fetch_xor (addr, value, __ATOMIC_RELAXED);
}
static inline int32_t opal_atomic_fetch_sub_32(volatile int32_t *addr, int32_t delta)
{
return __atomic_fetch_sub (addr, delta, __ATOMIC_RELAXED);
}
static inline bool opal_atomic_compare_exchange_strong_acq_64 (volatile int64_t *addr, int64_t *oldval, int64_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
static inline bool opal_atomic_compare_exchange_strong_rel_64 (volatile int64_t *addr, int64_t *oldval, int64_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
}
static inline bool opal_atomic_compare_exchange_strong_64 (volatile int64_t *addr, int64_t *oldval, int64_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
static inline int64_t opal_atomic_swap_64 (volatile int64_t *addr, int64_t newval)
{
int64_t oldval;
__atomic_exchange (addr, &newval, &oldval, __ATOMIC_RELAXED);
return oldval;
}
static inline int64_t opal_atomic_fetch_add_64(volatile int64_t *addr, int64_t delta)
{
return __atomic_fetch_add (addr, delta, __ATOMIC_RELAXED);
}
static inline int64_t opal_atomic_fetch_and_64(volatile int64_t *addr, int64_t value)
{
return __atomic_fetch_and (addr, value, __ATOMIC_RELAXED);
}
static inline int64_t opal_atomic_fetch_or_64(volatile int64_t *addr, int64_t value)
{
return __atomic_fetch_or (addr, value, __ATOMIC_RELAXED);
}
static inline int64_t opal_atomic_fetch_xor_64(volatile int64_t *addr, int64_t value)
{
return __atomic_fetch_xor (addr, value, __ATOMIC_RELAXED);
}
static inline int64_t opal_atomic_fetch_sub_64(volatile int64_t *addr, int64_t delta)
{
return __atomic_fetch_sub (addr, delta, __ATOMIC_RELAXED);
}
#if OPAL_HAVE_GCC_BUILTIN_CSWAP_INT128
#define OPAL_HAVE_ATOMIC_COMPARE_EXCHANGE_128 1
static inline bool opal_atomic_compare_exchange_strong_128 (volatile opal_int128_t *addr,
opal_int128_t *oldval, opal_int128_t newval)
{
return __atomic_compare_exchange_n (addr, oldval, newval, false,
__ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
#elif defined(OPAL_HAVE_SYNC_BUILTIN_CSWAP_INT128) && OPAL_HAVE_SYNC_BUILTIN_CSWAP_INT128
#define OPAL_HAVE_ATOMIC_COMPARE_EXCHANGE_128 1
/* __atomic version is not lock-free so use legacy __sync version */
static inline bool opal_atomic_compare_exchange_strong_128 (volatile opal_int128_t *addr,
opal_int128_t *oldval, opal_int128_t newval)
{
opal_int128_t prev = __sync_val_compare_and_swap (addr, *oldval, newval);
bool ret = prev == *oldval;
*oldval = prev;
return ret;
}
#endif
#if defined(__HLE__)
#include <immintrin.h>
#define OPAL_HAVE_ATOMIC_SPINLOCKS 1
static inline void opal_atomic_lock_init (opal_atomic_lock_t* lock, int32_t value)
{
lock->u.lock = value;
}
static inline int opal_atomic_trylock(opal_atomic_lock_t *lock)
{
int ret = __atomic_exchange_n (&lock->u.lock, OPAL_ATOMIC_LOCK_LOCKED,
__ATOMIC_ACQUIRE | __ATOMIC_HLE_ACQUIRE);
if (OPAL_ATOMIC_LOCK_LOCKED == ret) {
/* abort the transaction */
_mm_pause ();
return 1;
}
return 0;
}
static inline void opal_atomic_lock (opal_atomic_lock_t *lock)
{
while (OPAL_ATOMIC_LOCK_LOCKED == __atomic_exchange_n (&lock->u.lock, OPAL_ATOMIC_LOCK_LOCKED,
__ATOMIC_ACQUIRE | __ATOMIC_HLE_ACQUIRE)) {
/* abort the transaction */
_mm_pause ();
}
}
static inline void opal_atomic_unlock (opal_atomic_lock_t *lock)
{
__atomic_store_n (&lock->u.lock, OPAL_ATOMIC_LOCK_UNLOCKED,
__ATOMIC_RELEASE | __ATOMIC_HLE_RELEASE);
}
#endif
#if defined(__SUNPRO_C) || defined(__SUNPRO_CC)
#pragma error_messages(default, E_ARG_INCOMPATIBLE_WITH_ARG_L)
#endif
#endif /* ! OPAL_SYS_ARCH_ATOMIC_H */
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