+/* Copyright (c) 2013-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
#include "colls_private.h"
//#include <star-reduction.c>
rank = smpi_comm_rank(comm);
nprocs = smpi_comm_size(comm);
+ if((nprocs&(nprocs-1)))
+ THROWF(arg_error,0, "allreduce rab1 algorithm can't be used with non power of two number of processes ! ");
+
extent = smpi_datatype_get_extent(dtype);
pof2 = 1;
pof2 <<= 1;
pof2 >>= 1;
- mask = 1;
send_idx = recv_idx = 0;
// uneven count