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