ref: d6839757dffdf592ae300726a64e0f3199a9cd56
dir: /libfaad/fftw/fni_3.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 20:44:03 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -notwiddleinv 3 */
/*
* This function contains 12 FP additions, 4 FP multiplications,
* (or, 10 additions, 2 multiplications, 2 fused multiply/add),
* 12 stack variables, and 12 memory accesses
*/
static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
/*
* Generator Id's :
* $Id: fni_3.c,v 1.1 2002/04/07 21:26:04 menno Exp $
* $Id: fni_3.c,v 1.1 2002/04/07 21:26:04 menno Exp $
* $Id: fni_3.c,v 1.1 2002/04/07 21:26:04 menno Exp $
*/
void fftwi_no_twiddle_3(const fftw_complex *input, fftw_complex *output, int istride, int ostride)
{
fftw_real tmp1;
fftw_real tmp6;
fftw_real tmp4;
fftw_real tmp5;
fftw_real tmp9;
fftw_real tmp12;
fftw_real tmp11;
fftw_real tmp10;
ASSERT_ALIGNED_DOUBLE;
tmp1 = c_re(input[0]);
tmp6 = c_im(input[0]);
{
fftw_real tmp2;
fftw_real tmp3;
fftw_real tmp7;
fftw_real tmp8;
ASSERT_ALIGNED_DOUBLE;
tmp2 = c_re(input[istride]);
tmp3 = c_re(input[2 * istride]);
tmp4 = tmp2 + tmp3;
tmp5 = K866025403 * (tmp2 - tmp3);
tmp7 = c_im(input[istride]);
tmp8 = c_im(input[2 * istride]);
tmp9 = tmp7 + tmp8;
tmp12 = K866025403 * (tmp8 - tmp7);
}
c_re(output[0]) = tmp1 + tmp4;
tmp11 = tmp1 - (K500000000 * tmp4);
c_re(output[2 * ostride]) = tmp11 - tmp12;
c_re(output[ostride]) = tmp11 + tmp12;
c_im(output[0]) = tmp6 + tmp9;
tmp10 = tmp6 - (K500000000 * tmp9);
c_im(output[ostride]) = tmp5 + tmp10;
c_im(output[2 * ostride]) = tmp10 - tmp5;
}
fftw_codelet_desc fftwi_no_twiddle_3_desc =
{
"fftwi_no_twiddle_3",
(void (*)()) fftwi_no_twiddle_3,
3,
FFTW_BACKWARD,
FFTW_NOTW,
78,
0,
(const int *) 0,
};