diff options
| author | Ivan Maidanski <ivmai@mail.ru> | 2016-04-05 00:27:50 +0300 |
|---|---|---|
| committer | Ivan Maidanski <ivmai@mail.ru> | 2016-04-08 23:30:52 +0300 |
| commit | 2317eaf48d677d30e2b34e46517c72fa004e8a54 (patch) | |
| tree | e7e2d4a97431a884c70bc66e6dc5138de35e69e5 | |
| parent | 73d83212c4ed9cd4e91a9ac8e649f30239077292 (diff) | |
| download | libatomic_ops-2317eaf48d677d30e2b34e46517c72fa004e8a54.tar.gz | |
Use GCC atomic intrinsics for MIPS (GCC 4.9+ and clang 3.5+)
* src/atomic_ops/sysdeps/gcc/mips.h: Include generic.h and do not
include all_aligned_atomic_load_store.h if AO_PREFER_BUILTIN_ATOMICS or
GCC 4.9+ or clang 3.5+ unless AO_DISABLE_GCC_ATOMICS.
* src/atomic_ops/sysdeps/gcc/mips.h (AO_MIPS_SET_ISA, AO_MIPS_LL_1,
AO_MIPS_SC, AO_MIPS_LL, AO_nop_full, AO_fetch_and_add, AO_test_and_set,
AO_compare_and_swap, AO_fetch_compare_and_swap): Do not define if
generic.h included.
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/mips.h | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/src/atomic_ops/sysdeps/gcc/mips.h b/src/atomic_ops/sysdeps/gcc/mips.h index 73ca551..9cfc337 100644 --- a/src/atomic_ops/sysdeps/gcc/mips.h +++ b/src/atomic_ops/sysdeps/gcc/mips.h @@ -17,24 +17,49 @@ * consistent. This is really aimed at modern embedded implementations. */ -#include "../all_aligned_atomic_load_store.h" - -#include "../test_and_set_t_is_ao_t.h" - /* Data dependence does not imply read ordering. */ #define AO_NO_DD_ORDERING -#if defined(_ABI64) && (_MIPS_SIM == _ABI64) -# define AO_MIPS_SET_ISA " .set mips3\n" -# define AO_MIPS_LL_1(args) " lld " args "\n" -# define AO_MIPS_SC(args) " scd " args "\n" -#else -# define AO_MIPS_SET_ISA " .set mips2\n" -# define AO_MIPS_LL_1(args) " ll " args "\n" -# define AO_MIPS_SC(args) " sc " args "\n" +#if !defined(_ABI64) || _MIPS_SIM != _ABI64 # define AO_T_IS_INT #endif +/* #include "../standard_ao_double_t.h" */ +/* TODO: Implement double-wide operations if available. */ + +#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9) \ + || __clang_major__ > 3 \ + || (__clang_major__ == 3 && __clang_minor__ >= 5) \ + || (defined(AO_PREFER_BUILTIN_ATOMICS) \ + && __GNUC__ == 4 && __GNUC_MINOR__ >= 2)) \ + && !defined(AO_DISABLE_GCC_ATOMICS) + /* Probably, it could be enabled even for earlier gcc/clang versions. */ + +# define AO_GCC_ATOMIC_TEST_AND_SET +# include "../test_and_set_t_is_ao_t.h" + + /* As of clang-3.6/mips[64], __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n missing. */ +# if defined(__clang__) +# define AO_GCC_FORCE_HAVE_CAS +# endif + +# include "generic.h" + +#else /* AO_DISABLE_GCC_ATOMICS */ + +# include "../test_and_set_t_is_ao_t.h" +# include "../all_aligned_atomic_load_store.h" + +# ifdef AO_T_IS_INT +# define AO_MIPS_SET_ISA " .set mips2\n" +# define AO_MIPS_LL_1(args) " ll " args "\n" +# define AO_MIPS_SC(args) " sc " args "\n" +# else +# define AO_MIPS_SET_ISA " .set mips3\n" +# define AO_MIPS_LL_1(args) " lld " args "\n" +# define AO_MIPS_SC(args) " scd " args "\n" +# endif + #ifdef AO_ICE9A1_LLSC_WAR /* ICE9 rev A1 chip (used in very few systems) is reported to */ /* have a low-frequency bug that causes LL to fail. */ @@ -168,8 +193,7 @@ AO_fetch_compare_and_swap(volatile AO_t *addr, AO_t old, AO_t new_val) } #define AO_HAVE_fetch_compare_and_swap -/* #include "../standard_ao_double_t.h" */ -/* TODO: Implement double-wide operations if available. */ +#endif /* AO_DISABLE_GCC_ATOMICS */ /* CAS primitives with acquire, release and full semantics are */ /* generated automatically (and AO_int_... primitives are */ |