diff options
| author | Ivan Maidanski <ivmai@mail.ru> | 2013-02-28 19:46:58 +0400 |
|---|---|---|
| committer | Ivan Maidanski <ivmai@mail.ru> | 2013-02-28 19:46:58 +0400 |
| commit | 9cb2e7ebc4a80f449f2a99b7bf3dc754c9d697c9 (patch) | |
| tree | aafe8bde842e94fede0f49faf6e150916329afaf /src/atomic_ops | |
| parent | 635253907f13acc5b0d22321ca8097b460271b40 (diff) | |
| download | libatomic_ops-9cb2e7ebc4a80f449f2a99b7bf3dc754c9d697c9.tar.gz | |
Define nop_write as 'dmb st' for AArch64
* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_nop_write): Define via asm
(dmb st) statement unless AO_UNIPROCESSOR (because it seems there is
no equivalent definition using compiler __atomic_thread_fence).
* src/atomic_ops/sysdeps/gcc/generic.h (AO_nop_write): Do not define
if already is.
Diffstat (limited to 'src/atomic_ops')
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/aarch64.h | 11 | ||||
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/generic.h | 14 |
2 files changed, 17 insertions, 8 deletions
diff --git a/src/atomic_ops/sysdeps/gcc/aarch64.h b/src/atomic_ops/sysdeps/gcc/aarch64.h index 7ff0db8..7408e07 100644 --- a/src/atomic_ops/sysdeps/gcc/aarch64.h +++ b/src/atomic_ops/sysdeps/gcc/aarch64.h @@ -15,10 +15,17 @@ * */ -/* TODO: Remove this file, directly include headers from atomic_ops.h */ - #include "../test_and_set_t_is_ao_t.h" #include "../standard_ao_double_t.h" +#ifndef AO_UNIPROCESSOR + AO_INLINE void + AO_nop_write(void) + { + __asm__ __volatile__("dmb st" : : : "memory"); + } +# define AO_HAVE_nop_write +#endif + #include "generic.h" diff --git a/src/atomic_ops/sysdeps/gcc/generic.h b/src/atomic_ops/sysdeps/gcc/generic.h index f0927b0..3d5a752 100644 --- a/src/atomic_ops/sysdeps/gcc/generic.h +++ b/src/atomic_ops/sysdeps/gcc/generic.h @@ -39,12 +39,14 @@ } # define AO_HAVE_nop_read - AO_INLINE void - AO_nop_write(void) - { - __atomic_thread_fence(__ATOMIC_RELEASE); - } -# define AO_HAVE_nop_write +# ifndef AO_HAVE_nop_write + AO_INLINE void + AO_nop_write(void) + { + __atomic_thread_fence(__ATOMIC_RELEASE); + } +# define AO_HAVE_nop_write +# endif AO_INLINE void AO_nop_full(void) |