diff options
Diffstat (limited to 'src/atomic_ops/sysdeps/gcc/x86.h')
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/x86.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/atomic_ops/sysdeps/gcc/x86.h b/src/atomic_ops/sysdeps/gcc/x86.h index 60bdfb3..bed51d1 100644 --- a/src/atomic_ops/sysdeps/gcc/x86.h +++ b/src/atomic_ops/sysdeps/gcc/x86.h @@ -25,8 +25,8 @@ #include "../test_and_set_t_is_char.h" -#if defined(__x86_64__) && !defined(AO_USE_PENTIUM4_INSTRS) - /* "mfence" (SSE2) is supported on all x86_64/amd64 chips. */ +#if defined(__SSE2__) && !defined(AO_USE_PENTIUM4_INSTRS) + /* "mfence" is a part of SSE2 set (introduced on Intel Pentium 4). */ # define AO_USE_PENTIUM4_INSTRS #endif @@ -282,6 +282,9 @@ AO_fetch_compare_and_swap_full(volatile AO_t *addr, AO_t old_val, } # define AO_HAVE_int_fetch_and_add_full +/* TODO: Implement double_load/store. */ +/* TODO: Test some gcc macro to detect presence of cmpxchg16b. */ + # ifdef AO_CMPXCHG16B_AVAILABLE # include "../standard_ao_double_t.h" |