Hi all, I have a question on datatypes in openmpi:
Is there an (easy?) way to use __float128 variables with openmpi? Specifically, functions like MPI_Allreduce seem to give weird results with __float128. Essentially all I found was http://beige.ucs.indiana.edu/I590/node100.html where they state ---- MPI_LONG_DOUBLE This is a quadruple precision, 128-bit long floating point number. ---- But as far as I have seen, MPI_LONG_DOUBLE is only used for long doubles. The Open MPI Version is 1.6.3 and gcc is 4.7.3 on a x86_64 machine. Any help or comment is very appreciated! Best regards, Patrick
