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/*
* Copyright (c) 1997-1999 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* This file was automatically generated --- DO NOT EDIT */
/* Generated on Sun Nov 7 20:44:42 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-forward 2 */
/*
* This function contains 8 FP additions, 4 FP multiplications,
* (or, 6 additions, 2 multiplications, 2 fused multiply/add),
* 11 stack variables, and 16 memory accesses
*/
/*
* Generator Id's :
* $Id: fhf_2.c,v 1.1.1.1 2006/05/12 15:14:45 veplaini Exp $
* $Id: fhf_2.c,v 1.1.1.1 2006/05/12 15:14:45 veplaini Exp $
* $Id: fhf_2.c,v 1.1.1.1 2006/05/12 15:14:45 veplaini Exp $
*/
void fftw_hc2hc_forward_2(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist)
{
int i;
fftw_real *X;
fftw_real *Y;
X = A;
Y = A + (2 * iostride);
{
fftw_real tmp11;
fftw_real tmp12;
ASSERT_ALIGNED_DOUBLE;
tmp11 = X[0];
tmp12 = X[iostride];
X[iostride] = tmp11 - tmp12;
X[0] = tmp11 + tmp12;
}
X = X + dist;
Y = Y - dist;
for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 1) {
fftw_real tmp3;
fftw_real tmp9;
fftw_real tmp8;
fftw_real tmp10;
ASSERT_ALIGNED_DOUBLE;
tmp3 = X[0];
tmp9 = Y[-iostride];
{
fftw_real tmp5;
fftw_real tmp7;
fftw_real tmp4;
fftw_real tmp6;
ASSERT_ALIGNED_DOUBLE;
tmp5 = X[iostride];
tmp7 = Y[0];
tmp4 = c_re(W[0]);
tmp6 = c_im(W[0]);
tmp8 = (tmp4 * tmp5) - (tmp6 * tmp7);
tmp10 = (tmp6 * tmp5) + (tmp4 * tmp7);
}
Y[-iostride] = tmp3 - tmp8;
X[0] = tmp3 + tmp8;
X[iostride] = -(tmp9 - tmp10);
Y[0] = tmp10 + tmp9;
}
if (i == m) {
fftw_real tmp1;
fftw_real tmp2;
ASSERT_ALIGNED_DOUBLE;
tmp1 = X[0];
X[0] = tmp1;
tmp2 = X[iostride];
Y[0] = -tmp2;
}
}
static const int twiddle_order[] =
{1};
fftw_codelet_desc fftw_hc2hc_forward_2_desc =
{
"fftw_hc2hc_forward_2",
(void (*)()) fftw_hc2hc_forward_2,
2,
FFTW_FORWARD,
FFTW_HC2HC,
47,
1,
twiddle_order,
};
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