On Sun, Jan 27, 2013 at 07:15:42PM +0100, Florian Weimer wrote: > On 01/12/2013 04:28 PM, Andi Kleen wrote: > > >The TSX HLE/RTM intrinsics were missing documentation. Add this to the > >manual. > > Are these intrinsics restricted to free-standing implementations? Or > are these instructions designed in such a way that they work as expected > even if the threading library uses them internally? (That would be > quite a feat.)
They can be combined with a threading library, with some restrictions. See the manual for details. All transactions are flattened. http://software.intel.com/sites/default/files/m/a/b/3/4/d/41604-319433-012a.pdf chapter 8 "restrictions" may lead to not eliding or abort, but never to correctness problems. Documenting all that is out of scope for the gcc manual though. -Andi -- a...@linux.intel.com -- Speaking for myself only.
