I am trying to launch an old c program developed for the intel / 860 but I do not know if there could be the MPI equivalent of the following functions:
crecv
gxsum
gsendx
irec
isend
msgcancel
msgwait
Do you mean i860 as in https://en.wikipedia.org/wiki/Intel_i860 and Intel supercomputer iPSC/860 available ~ 20 years ago? I believe that the functions you are referring to in your post are from NX message passing library that was preceding MPI. I think you might be better off by starting from scratch, e.g., I'm not sure if NX API documentation even exists any longer.
