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2 pj 1
/*
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 * Copyright (c) 1997-1999 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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/* This file was automatically generated --- DO NOT EDIT */
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/* Generated on Tue May 18 13:55:46 EDT 1999 */
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107 pj 23
#include <fftw-int.h>
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#include <fftw.h>
2 pj 25
 
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/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddleinv 4 */
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/*
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 * This function contains 22 FP additions, 12 FP multiplications,
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 * (or, 16 additions, 6 multiplications, 6 fused multiply/add),
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 * 14 stack variables, and 16 memory accesses
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 */
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/*
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 * Generator Id's :
107 pj 36
 * $Id: ftwi_4.c,v 1.2 2003-03-24 11:14:53 pj Exp $
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 * $Id: ftwi_4.c,v 1.2 2003-03-24 11:14:53 pj Exp $
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 * $Id: ftwi_4.c,v 1.2 2003-03-24 11:14:53 pj Exp $
2 pj 39
 */
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void fftwi_twiddle_4(fftw_complex *A, const fftw_complex *W, int iostride, int m, int dist)
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{
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     int i;
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     fftw_complex *inout;
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     inout = A;
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     for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 3) {
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          fftw_real tmp1;
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          fftw_real tmp25;
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          fftw_real tmp6;
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          fftw_real tmp24;
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          fftw_real tmp12;
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          fftw_real tmp20;
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          fftw_real tmp17;
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          fftw_real tmp21;
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          ASSERT_ALIGNED_DOUBLE();
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          tmp1 = c_re(inout[0]);
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          tmp25 = c_im(inout[0]);
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          {
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               fftw_real tmp3;
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               fftw_real tmp5;
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               fftw_real tmp2;
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               fftw_real tmp4;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp3 = c_re(inout[2 * iostride]);
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               tmp5 = c_im(inout[2 * iostride]);
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               tmp2 = c_re(W[1]);
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               tmp4 = c_im(W[1]);
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               tmp6 = (tmp2 * tmp3) + (tmp4 * tmp5);
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               tmp24 = (tmp2 * tmp5) - (tmp4 * tmp3);
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          }
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          {
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               fftw_real tmp9;
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               fftw_real tmp11;
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               fftw_real tmp8;
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               fftw_real tmp10;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp9 = c_re(inout[iostride]);
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               tmp11 = c_im(inout[iostride]);
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               tmp8 = c_re(W[0]);
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               tmp10 = c_im(W[0]);
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               tmp12 = (tmp8 * tmp9) + (tmp10 * tmp11);
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               tmp20 = (tmp8 * tmp11) - (tmp10 * tmp9);
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          }
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          {
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               fftw_real tmp14;
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               fftw_real tmp16;
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               fftw_real tmp13;
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               fftw_real tmp15;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp14 = c_re(inout[3 * iostride]);
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               tmp16 = c_im(inout[3 * iostride]);
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               tmp13 = c_re(W[2]);
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               tmp15 = c_im(W[2]);
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               tmp17 = (tmp13 * tmp14) + (tmp15 * tmp16);
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               tmp21 = (tmp13 * tmp16) - (tmp15 * tmp14);
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          }
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          {
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               fftw_real tmp7;
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               fftw_real tmp18;
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               fftw_real tmp27;
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               fftw_real tmp28;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp7 = tmp1 + tmp6;
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               tmp18 = tmp12 + tmp17;
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               c_re(inout[2 * iostride]) = tmp7 - tmp18;
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               c_re(inout[0]) = tmp7 + tmp18;
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               tmp27 = tmp12 - tmp17;
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               tmp28 = tmp25 - tmp24;
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               c_im(inout[iostride]) = tmp27 + tmp28;
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               c_im(inout[3 * iostride]) = tmp28 - tmp27;
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          }
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          {
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               fftw_real tmp23;
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               fftw_real tmp26;
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               fftw_real tmp19;
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               fftw_real tmp22;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp23 = tmp20 + tmp21;
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               tmp26 = tmp24 + tmp25;
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               c_im(inout[0]) = tmp23 + tmp26;
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               c_im(inout[2 * iostride]) = tmp26 - tmp23;
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               tmp19 = tmp1 - tmp6;
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               tmp22 = tmp20 - tmp21;
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               c_re(inout[iostride]) = tmp19 - tmp22;
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               c_re(inout[3 * iostride]) = tmp19 + tmp22;
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          }
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     }
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}
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static const int twiddle_order[] =
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{1, 2, 3};
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fftw_codelet_desc fftwi_twiddle_4_desc =
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{
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     "fftwi_twiddle_4",
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     (void (*)()) fftwi_twiddle_4,
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     4,
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     FFTW_BACKWARD,
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     FFTW_TWIDDLE,
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     99,
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     3,
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     twiddle_order,
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};