69 lines
2.2 KiB
C
69 lines
2.2 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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/* out of place copy routines for pairs of isomorphic 2D arrays */
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#include "kernel/ifftw.h"
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void X(cpy2d_pair)(R *I0, R *I1, R *O0, R *O1,
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INT n0, INT is0, INT os0,
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INT n1, INT is1, INT os1)
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{
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INT i0, i1;
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for (i1 = 0; i1 < n1; ++i1)
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for (i0 = 0; i0 < n0; ++i0) {
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R x0 = I0[i0 * is0 + i1 * is1];
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R x1 = I1[i0 * is0 + i1 * is1];
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O0[i0 * os0 + i1 * os1] = x0;
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O1[i0 * os0 + i1 * os1] = x1;
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}
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}
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void X(zero1d_pair)(R *O0, R *O1, INT n0, INT os0)
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{
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INT i0;
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for (i0 = 0; i0 < n0; ++i0) {
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O0[i0 * os0] = 0;
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O1[i0 * os0] = 0;
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}
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}
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/* like cpy2d_pair, but read input contiguously if possible */
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void X(cpy2d_pair_ci)(R *I0, R *I1, R *O0, R *O1,
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INT n0, INT is0, INT os0,
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INT n1, INT is1, INT os1)
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{
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if (IABS(is0) < IABS(is1)) /* inner loop is for n0 */
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X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
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else
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X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
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}
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/* like cpy2d_pair, but write output contiguously if possible */
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void X(cpy2d_pair_co)(R *I0, R *I1, R *O0, R *O1,
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INT n0, INT is0, INT os0,
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INT n1, INT is1, INT os1)
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{
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if (IABS(os0) < IABS(os1)) /* inner loop is for n0 */
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X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
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else
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X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
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}
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