mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-27 06:53:01 +00:00
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include "ifftw-mpi.h"
|
|
|
|
/* common functions for rearrangements of the data for the *-rank1-bigvec
|
|
solvers */
|
|
|
|
static int div_mult(INT b, INT a) {
|
|
return (a > b && a % b == 0);
|
|
}
|
|
static int div_mult2(INT b, INT a, INT n) {
|
|
return (div_mult(b, a) && div_mult(n, b));
|
|
}
|
|
|
|
int XM(rearrange_applicable)(rearrangement rearrange,
|
|
ddim dim0, INT vn, int n_pes)
|
|
{
|
|
/* note: it is important that cases other than CONTIG be
|
|
applicable only when the resulting transpose dimension
|
|
is divisible by n_pes; otherwise, the allocation size
|
|
returned by the API will be incorrect */
|
|
return ((rearrange != DISCONTIG || div_mult(n_pes, vn))
|
|
&& (rearrange != SQUARE_BEFORE
|
|
|| div_mult2(dim0.b[IB], vn, n_pes))
|
|
&& (rearrange != SQUARE_AFTER
|
|
|| (dim0.b[IB] != dim0.b[OB]
|
|
&& div_mult2(dim0.b[OB], vn, n_pes)))
|
|
&& (rearrange != SQUARE_MIDDLE
|
|
|| div_mult(dim0.n * n_pes, vn)));
|
|
}
|
|
|
|
INT XM(rearrange_ny)(rearrangement rearrange, ddim dim0, INT vn, int n_pes)
|
|
{
|
|
switch (rearrange) {
|
|
case CONTIG:
|
|
return vn;
|
|
case DISCONTIG:
|
|
return n_pes;
|
|
case SQUARE_BEFORE:
|
|
return dim0.b[IB];
|
|
case SQUARE_AFTER:
|
|
return dim0.b[OB];
|
|
case SQUARE_MIDDLE:
|
|
return dim0.n * n_pes;
|
|
}
|
|
return 0;
|
|
}
|