diff options
Diffstat (limited to 'boost/atomic/detail/caps_msvc_x86.hpp')
| -rw-r--r-- | boost/atomic/detail/caps_msvc_x86.hpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/boost/atomic/detail/caps_msvc_x86.hpp b/boost/atomic/detail/caps_msvc_x86.hpp index 5661a5b7ab..2ee4c92111 100644 --- a/boost/atomic/detail/caps_msvc_x86.hpp +++ b/boost/atomic/detail/caps_msvc_x86.hpp @@ -30,6 +30,11 @@ #define BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B 1 #endif +#if defined(_MSC_VER) && (defined(_M_AMD64) || (defined(_M_IX86) && defined(_M_IX86_FP) && _M_IX86_FP >= 2)) +// Use mfence only if SSE2 is available +#define BOOST_ATOMIC_DETAIL_X86_HAS_MFENCE 1 +#endif + #define BOOST_ATOMIC_INT8_LOCK_FREE 2 #define BOOST_ATOMIC_INT16_LOCK_FREE 2 #define BOOST_ATOMIC_INT32_LOCK_FREE 2 |