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| author | Rickard Green <rickard@erlang.org> | 2021-02-12 16:25:48 +0100 |
|---|---|---|
| committer | Rickard Green <rickard@erlang.org> | 2021-02-12 18:27:37 +0100 |
| commit | ceb6000d3ed3b032c162887041d90fa48045c3a4 (patch) | |
| tree | 1689775550f0aad919544d20cccbe5edda94aebe | |
| parent | 1ee8e107855f9b4779d8d53063829a31b14a6d9e (diff) | |
| download | erlang-ceb6000d3ed3b032c162887041d90fa48045c3a4.tar.gz | |
Enable use of __atomic acquire/release barriers on 64-bit ppc for gcc >= 9.3.0
| -rw-r--r-- | erts/include/internal/gcc/ethread.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/erts/include/internal/gcc/ethread.h b/erts/include/internal/gcc/ethread.h index 12b41f8704..d9448592d1 100644 --- a/erts/include/internal/gcc/ethread.h +++ b/erts/include/internal/gcc/ethread.h @@ -44,6 +44,10 @@ #undef ETHR_GCC_RELB_VERSIONS__ #undef ETHR_GCC_RELB_MOD_VERSIONS__ #undef ETHR_GCC_MB_MOD_VERSIONS__ +#undef ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS__ + +#define ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS__ \ + ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS /* * True GNU GCCs before version 4.8 do not emit a memory barrier @@ -64,6 +68,14 @@ #elif !ETHR_AT_LEAST_GCC_VSN__(4, 8, 0) /* True gcc of version < 4.8, i.e., bug exist... */ # define ETHR___atomic_load_ACQUIRE_barrier_bug ETHR_GCC_VERSIONS_MASK__ +#elif ETHR_AT_LEAST_GCC_VSN__(9, 3, 0) \ + && (defined(__powerpc__) || defined(__ppc__) || defined(__powerpc64__)) \ + && ETHR_SIZEOF_PTR == 8 +/* Verified not to have this bug */ +# define ETHR___atomic_load_ACQUIRE_barrier_bug 0 +/* Also trust builtin barriers */ +# undef ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS__ +# define ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS__ 1 #else /* True gcc of version >= 4.8 */ /* * Sizes less than or equal to word size have been fixed, @@ -87,7 +99,7 @@ #define ETHR_GCC_RELAXED_VERSIONS__ ETHR_GCC_VERSIONS_MASK__ #define ETHR_GCC_RELAXED_MOD_VERSIONS__ ETHR_GCC_VERSIONS_MASK__ -#if ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS +#if ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS__ # define ETHR_GCC_ACQB_VERSIONS__ ETHR_GCC_VERSIONS_MASK__ # define ETHR_GCC_ACQB_MOD_VERSIONS__ ETHR_GCC_VERSIONS_MASK__ # define ETHR_GCC_RELB_VERSIONS__ ETHR_GCC_VERSIONS_MASK__ |