# MPIU_SUM___FP16___FLOAT128
MPI_Op that acts as a replacement for MPI_SUM with custom MPI_Datatype `MPIU___FLOAT128`, `MPIU___COMPLEX128`, and `MPIU___FP16`. 


## Developer Note
This should be unified with `MPIU_SUM`


## See Also
 `MPIU_REAL`, `MPIU_SCALAR`, `MPIU_COMPLEX`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscsys.h.html#MPIU_SUM___FP16___FLOAT128">include/petscsys.h</A>


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