Subversion Repositories shark

/*
 * 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 Tue May 18 13:55:45 EDT 1999 */

#include <fftw-int.h>
#include <fftw.h>

/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddleinv 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: ftwi_2.c,v 1.2 2003-03-24 11:14:53 pj Exp $
 * $Id: ftwi_2.c,v 1.2 2003-03-24 11:14:53 pj Exp $
 * $Id: ftwi_2.c,v 1.2 2003-03-24 11:14:53 pj Exp $
 */

void fftwi_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 = (tmp2 * tmp5) - (tmp4 * tmp3);
          }
          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 fftwi_twiddle_2_desc =
{
     "fftwi_twiddle_2",
     (void (*)()) fftwi_twiddle_2,
     2,
     FFTW_BACKWARD,
     FFTW_TWIDDLE,
     55,
     1,
     twiddle_order,
};