* boost.atomic: 128bit lockfree atomics for MSVC 2008+ (using _InterlockedCompareExchange128 and SSE2 intrinsics) and GCC-compatible POSIX compilers (using 16 byte __sync intrinsics). This code is x86-64 specific, and disabled by default. Define BOOST_ATOMIC_HAVE_SSE2 to enable in x86-64 MSVC 2008+ environments. Define BOOST_ATOMIC_HAVE_SSE2,
... atomics and sse2? how does this work together? afair, sse2 reads/writes are not even guaranteed to be atomic and both concepts are quite orthogonal ...
double-checked with intel's software developer's manual, volume 3a, section 8.1.1: there is no way to access 128bit words atomically. afaik, the only way to implement them correctly is to use cmpxchg16b ... -- tim@klingt.org http://tim.klingt.org Art is either a complaint or do something else John Cage quoting Jasper Johns