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Add fallbacks to __sync_* or __c11_atomic_* builtins when __atomic_* is not supported. Fixes #143.

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Devin Matthews
2017-07-20 10:04:34 -05:00
committed by prangana
parent 6f07a034d5
commit 2a9aa134f7
1 changed files with 40 additions and 0 deletions
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40
frame/thread/bli_thrcomm.c
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@@ -52,6 +52,46 @@ void* bli_thrcomm_bcast
return object;
}
// Swap out __atomic_* builtins for __sync_* builtins for:
// - BG/Q
// - gcc <4.7 (including icc through gcc compatibility layer)
// - clang without c11 atomic builtins
#if defined(__bgq__) || \
(defined(__GNUC__) && (__GNUC__ < 4 || \
(__GNUC__ == 4 && __GNUC_MINOR__ < 7))) || \
(defined(__clang__) && !__has_extension(c_atomic))
#define __ATOMIC_RELAXED
#define __ATOMIC_ACQUIRE
#define __ATOMIC_RELEASE
#define __ATOMIC_ACQ_REL
#define __atomic_load_n(ptr, constraint) \
__sync_fetch_and_add(ptr, 0)
#define __atomic_add_fetch(ptr, value, constraint) \
__sync_add_and_fetch(ptr, value)
#define __atomic_fetch_add(ptr, value, constraint) \
__sync_fetch_and_add(ptr, value)
#define __atomic_fetch_xor(ptr, value, constraint) \
__sync_fetch_and_xor(ptr, value)
#endif
// Swap out __atomic_* builtins for _c11_atomic_* builtins for
// - clang with c11 atomic builtins
#if defined(__clang__) && __has_extension(c_atomic)
#define __atomic_load_n(ptr, constraint) \
__c11_atomic_load(ptr, constraint)
#define __atomic_add_fetch(ptr, value, constraint) \
(__c11_fetch_add(ptr, value, constraint) + value)
#define __atomic_fetch_add(ptr, value, constraint) \
__c11_fetch_add(ptr, value, constraint)
#define __atomic_fetch_xor(ptr, value, constraint) \
__c11_fetch_xor(ptr, value, constraint)
#endif
void bli_thrcomm_barrier_atomic( thrcomm_t* comm, dim_t t_id )
{
// Return early if the comm is NULL or if there is only one