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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdlib.h>
#include <stdio.h>
#include "mpi.h"
#include "mpitest.h"
/* Some MPI implementations should not support MPI_LONG_DOUBLE because it has
* different representations/sizes among several concurrently supported
* compilers. For example, a 16-byte GCC implementation and an 8-byte Cray
* compiler implementation.
*
* This test ensures that simplistic build logic/configuration did not result in
* a defined, yet incorrectly sized, MPI predefined datatype for long double and
* long double _Complex. See tt#1671 for more info.
*
* Based on a test suggested by Jim Hoekstra @ Iowa State University. */
int main(int argc, char *argv[])
{
int rank, size, type_size;
int errs = 0;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (rank == 0) {
#ifdef HAVE_LONG_DOUBLE
if (MPI_LONG_DOUBLE != MPI_DATATYPE_NULL) {
MPI_Type_size(MPI_LONG_DOUBLE, &type_size);
if (type_size != sizeof(long double)) {
printf("type_size != sizeof(long double) : (%d != %zd)\n",
type_size, sizeof(long double));
++errs;
}
}
#endif
#if defined(HAVE_LONG_DOUBLE__COMPLEX) && defined(USE_LONG_DOUBLE_COMPLEX)
if (MPI_C_LONG_DOUBLE_COMPLEX != MPI_DATATYPE_NULL) {
MPI_Type_size(MPI_C_LONG_DOUBLE_COMPLEX, &type_size);
if (type_size != sizeof(long double _Complex)) {
printf("type_size != sizeof(long double _Complex) : (%d != %zd)\n",
type_size, sizeof(long double _Complex));
++errs;
}
}
#endif
if (errs) {
printf("found %d errors\n", errs);
} else {
printf(" No errors\n");
}
}
MPI_Finalize();
return MTestReturnValue(errs);
}
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