Table 1 lists all of the C++ predefined MPI datatypes and their corresponding C and C++ datatypes, Table 2 lists all of the Fortran predefined MPI datatypes and their corresponding Fortran 77 datatypes. Table 3 lists the C++ names for all other MPI datatypes.

MPI::BYTE and MPI::PACKED conform to the same restrictions as MPI_BYTE and MPI_PACKED, listed in Sections 3.2.2 and 3.13 of MPI-1, respectively.

The following table defines groups of MPI predefined datatypes:

[ C integer:] MPI::INT, MPI::LONG, MPI::SHORT,

[ ] MPI::UNSIGNED_SHORT, MPI::UNSIGNED,

[ ] MPI::UNSIGNED_LONG, MPI::SIGNED_CHAR,

[ ] MPI::UNSIGNED_CHAR

[ Fortran integer:] MPI::INTEGER

[ Floating point:] MPI::FLOAT, MPI::DOUBLE, MPI::REAL,

[ ] MPI::DOUBLE_PRECISION,

[ ] MPI::LONG_DOUBLE

[ Logical:] MPI::LOGICAL, MPI::BOOL

[ Complex:] MPI::F_COMPLEX, MPI::COMPLEX,

[ ] MPI::F_DOUBLE_COMPLEX,

[ ] MPI::DOUBLE_COMPLEX,

[ ] MPI::LONG_DOUBLE_COMPLEX

[ Byte:] MPI::BYTE

Valid datatypes for each reduction operation is specified below in terms of the groups defined above.

[ Op] Allowed Types

[ ]

[ MPI::MAX, MPI::MIN] C integer, Fortran integer, Floating point

[ MPI::SUM, MPI::PROD] C integer, Fortran integer,
Floating point, Complex

[ MPI::LAND, MPI::LOR, MPI::LXOR] C integer, Logical

[ MPI::BAND, MPI::BOR, MPI::BXOR] C integer, Fortran integer, Byte

MPI::MINLOC and MPI::MAXLOC perform just as their C and Fortran counterparts; see Section 4.9.3 in MPI-1.

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MPI-2.0 of July 18, 1997

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