ref: 5857a18ba4498e9bd73e3893ea59d460c5abe8b5
dir: /libfaad/fftw/ftw_2.c/
/*
* 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 20:44:30 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddle 2 */
/*
* This function contains 6 FP additions, 4 FP multiplications,
* (or, 4 additions, 2 multiplications, 2 fused multiply/add),
* 10 stack variables, and 8 memory accesses
*/
/*
* Generator Id's :
* $Id: ftw_2.c,v 1.1 2002/04/07 21:26:04 menno Exp $
* $Id: ftw_2.c,v 1.1 2002/04/07 21:26:04 menno Exp $
* $Id: ftw_2.c,v 1.1 2002/04/07 21:26:04 menno Exp $
*/
void fftw_twiddle_2(fftw_complex *A, const fftw_complex *W, int iostride, int m, int dist)
{
int i;
fftw_complex *inout;
inout = A;
for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 1) {
fftw_real tmp1;
fftw_real tmp8;
fftw_real tmp6;
fftw_real tmp7;
ASSERT_ALIGNED_DOUBLE;
tmp1 = c_re(inout[0]);
tmp8 = c_im(inout[0]);
{
fftw_real tmp3;
fftw_real tmp5;
fftw_real tmp2;
fftw_real tmp4;
ASSERT_ALIGNED_DOUBLE;
tmp3 = c_re(inout[iostride]);
tmp5 = c_im(inout[iostride]);
tmp2 = c_re(W[0]);
tmp4 = c_im(W[0]);
tmp6 = (tmp2 * tmp3) - (tmp4 * tmp5);
tmp7 = (tmp4 * tmp3) + (tmp2 * tmp5);
}
c_re(inout[iostride]) = tmp1 - tmp6;
c_re(inout[0]) = tmp1 + tmp6;
c_im(inout[0]) = tmp7 + tmp8;
c_im(inout[iostride]) = tmp8 - tmp7;
}
}
static const int twiddle_order[] =
{1};
fftw_codelet_desc fftw_twiddle_2_desc =
{
"fftw_twiddle_2",
(void (*)()) fftw_twiddle_2,
2,
FFTW_FORWARD,
FFTW_TWIDDLE,
44,
1,
twiddle_order,
};