Definition
MPI_C_FLOAT_COMPLEX is an MPI_Datatype that represents a floating complex type in MPI, it corresponds to a float _Complex in C.
Datatypes
C
MPI_C_FLOAT_COMPLEX is an MPI_Datatype that represents a floating complex type in MPI, it corresponds to a float _Complex in C.
#include <stdio.h>
#include <stdlib.h>
#include <complex.h>
#include <mpi.h>
/**
* @brief Illustrate how to communicate a complex float between 2 MPI processes.
* @details This application is meant to be run with 2 MPI processes: 1 sender
* and 1 receiver. The former sends a complex float to the latter, which prints
* it.
**/
int main(int argc, char* argv[])
{
MPI_Init(&argc, &argv);
// Check that 2 MPI processes are used.
int size;
MPI_Comm_size(MPI_COMM_WORLD, &size);
if(size != 2)
{
printf("This application is meant to be run with 2 MPI processes.\n");
MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
}
// Get my rank and do the corresponding job.
enum role_ranks { SENDER, RECEIVER };
int my_rank;
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
switch(my_rank)
{
case SENDER:
{
// Send the complex
float _Complex complexToSend = I * I;
printf("[MPI process %d] I send float complex: %.1f+%.1fi.\n", my_rank, crealf(complexToSend), cimagf(complexToSend));
MPI_Ssend(&complexToSend, 1, MPI_C_COMPLEX, RECEIVER, 0, MPI_COMM_WORLD);
break;
}
case RECEIVER:
{
// Receive the complex
float _Complex complexReceived;
MPI_Recv(&complexReceived, 1, MPI_C_COMPLEX, SENDER, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
printf("[MPI process %d] I received float complex: %.1f+%.1fi.\n", my_rank, crealf(complexReceived), cimagf(complexReceived));
break;
}
}
MPI_Finalize();
return EXIT_SUCCESS;
}
#include <stdio.h>
#include <stdlib.h>
#include <complex.h>
#include <mpi.h>
/**
* @brief Illustrate how to communicate an array of floats between 2 MPI
* processes.
* @details This application is meant to be run with 2 MPI processes: 1 sender
* and 1 receiver. The former sends an array of floats to the latter, which
* prints it.
**/
int main(int argc, char* argv[])
{
MPI_Init(&argc, &argv);
// Check that 2 MPI processes are used.
int size;
MPI_Comm_size(MPI_COMM_WORLD, &size);
if(size != 2)
{
printf("This application is meant to be run with 2 MPI processes.\n");
MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
}
// Get my rank and do the corresponding job.
enum role_ranks { SENDER, RECEIVER };
int my_rank;
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
switch(my_rank)
{
case SENDER:
{
// Send the complexes
float _Complex complexesToSend[2] = { I * I, 2 * I * I };
printf("[MPI process %d] I send float complexes: %.1f+%.1fi and %.1f+%.1fi.\n", my_rank, crealf(complexesToSend[0]), cimagf(complexesToSend[0]), crealf(complexesToSend[1]), cimagf(complexesToSend[1]));
MPI_Ssend(complexesToSend, 2, MPI_C_COMPLEX, RECEIVER, 0, MPI_COMM_WORLD);
break;
}
case RECEIVER:
{
// Receive the complexes
float _Complex complexesReceived[2];
MPI_Recv(complexesReceived, 2, MPI_C_COMPLEX, SENDER, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
printf("[MPI process %d] I received float complexes: %.1f+%.1fi and %.1f+%.1fi.\n", my_rank, crealf(complexesReceived[0]), cimagf(complexesReceived[0]), crealf(complexesReceived[1]), cimagf(complexesReceived[1]));
break;
}
}
MPI_Finalize();
return EXIT_SUCCESS;
}