On Wed, Nov 10, 2010 at 18:11, Number Cruncher <number.crunc...@ntlworld.com > wrote:
> Just some observations from a concerned user with a temperamental Open MPI > program (1.4.3): > > Fedora 14 (just released) includes glibc-2.12 which has optimized versions > of memcpy, including a copy backward. > > http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=6fb8cbcb58a29fff73eb2101b34caa19a7f88eba Is the memcpy-back code ever executed when called as memcpy()? I can't imagine why it would be, but it would make plenty of sense to use it inside memmove when the destination is at a higher address than the source. Jed
