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| author | Steve Vinoski <vinoski@ieee.org> | 2010-09-07 20:22:24 -0400 |
|---|---|---|
| committer | Steve Vinoski <vinoski@ieee.org> | 2010-09-07 20:22:24 -0400 |
| commit | 6412564cadfb99c0c2a5089f07e4a0a02f13902c (patch) | |
| tree | 589564e67b8599f3e1c2d209e6ebac8e9b5453e6 /erts/include | |
| parent | a78b39a0e9ff2cfd13273ab077dc852d70565647 (diff) | |
| download | erlang-6412564cadfb99c0c2a5089f07e4a0a02f13902c.tar.gz | |
add MIPS architecture to GCC ethread atomics support
Gcc for MIPS supports immediate atomic gets and sets, and also
supports a working __sync_synchronize() for gcc 4.2 and greater.
Diffstat (limited to 'erts/include')
| -rw-r--r-- | erts/include/internal/gcc/ethr_atomic.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/erts/include/internal/gcc/ethr_atomic.h b/erts/include/internal/gcc/ethr_atomic.h index 5fe6e23477..e8e529dd48 100644 --- a/erts/include/internal/gcc/ethr_atomic.h +++ b/erts/include/internal/gcc/ethr_atomic.h @@ -31,7 +31,7 @@ #define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 0 /* Enable immediate read/write on platforms where we know it is safe */ #if defined(__i386__) || defined(__x86_64__) || defined(__sparc__) \ - || defined(__powerpc__) || defined(__ppc__) + || defined(__powerpc__) || defined(__ppc__) || defined(__mips__) # undef ETHR_IMMED_ATOMIC_SET_GET_SAFE__ # define ETHR_IMMED_ATOMIC_SET_GET_SAFE__ 1 #endif @@ -48,13 +48,18 @@ typedef struct { * a noop on at least some platforms with some gcc versions. * This has suposedly been fixed in some gcc version, but we * don't know from which version. Therefore, we use the - * workaround implemented below on all gcc versions. + * workaround implemented below on all gcc versions except + * for gcc 4.2 or above for MIPS, where it's been verified. */ +#if defined(__mips__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)) +#define ETHR_MEMORY_BARRIER __sync_synchronize() +#else #define ETHR_MEMORY_BARRIER \ do { \ volatile long x___ = 0; \ (void) __sync_val_compare_and_swap(&x___, (long) 0, (long) 1); \ } while (0) +#endif #define ETHR_READ_DEPEND_MEMORY_BARRIER ETHR_MEMORY_BARRIER #if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_AUX_IMPL__) |