93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
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/*
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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 "kernel/ifftw.h"
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static void dimcpy(iodim *dst, const iodim *src, int rnk)
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{
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int i;
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if (FINITE_RNK(rnk))
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for (i = 0; i < rnk; ++i)
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dst[i] = src[i];
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}
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tensor *X(tensor_copy)(const tensor *sz)
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{
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tensor *x = X(mktensor)(sz->rnk);
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dimcpy(x->dims, sz->dims, sz->rnk);
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return x;
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}
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/* like X(tensor_copy), but makes strides in-place by
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setting os = is if k == INPLACE_IS or is = os if k == INPLACE_OS. */
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tensor *X(tensor_copy_inplace)(const tensor *sz, inplace_kind k)
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{
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tensor *x = X(tensor_copy)(sz);
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if (FINITE_RNK(x->rnk)) {
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int i;
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if (k == INPLACE_OS)
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for (i = 0; i < x->rnk; ++i)
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x->dims[i].is = x->dims[i].os;
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else
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for (i = 0; i < x->rnk; ++i)
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x->dims[i].os = x->dims[i].is;
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}
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return x;
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}
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/* Like X(tensor_copy), but copy all of the dimensions *except*
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except_dim. */
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tensor *X(tensor_copy_except)(const tensor *sz, int except_dim)
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{
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tensor *x;
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A(FINITE_RNK(sz->rnk) && sz->rnk >= 1 && except_dim < sz->rnk);
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x = X(mktensor)(sz->rnk - 1);
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dimcpy(x->dims, sz->dims, except_dim);
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dimcpy(x->dims + except_dim, sz->dims + except_dim + 1,
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x->rnk - except_dim);
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return x;
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}
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/* Like X(tensor_copy), but copy only rnk dimensions starting
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with start_dim. */
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tensor *X(tensor_copy_sub)(const tensor *sz, int start_dim, int rnk)
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{
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tensor *x;
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A(FINITE_RNK(sz->rnk) && start_dim + rnk <= sz->rnk);
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x = X(mktensor)(rnk);
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dimcpy(x->dims, sz->dims + start_dim, rnk);
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return x;
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}
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tensor *X(tensor_append)(const tensor *a, const tensor *b)
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{
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if (!FINITE_RNK(a->rnk) || !FINITE_RNK(b->rnk)) {
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return X(mktensor)(RNK_MINFTY);
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} else {
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tensor *x = X(mktensor)(a->rnk + b->rnk);
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dimcpy(x->dims, a->dims, a->rnk);
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dimcpy(x->dims + a->rnk, b->dims, b->rnk);
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return x;
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}
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}
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