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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 13:55:58 EDT 1999 */
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107 pj 23
#include <fftw-int.h>
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#include <fftw.h>
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/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-backward 3 */
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/*
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 * This function contains 24 FP additions, 16 FP multiplications,
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 * (or, 16 additions, 8 multiplications, 8 fused multiply/add),
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 * 15 stack variables, and 24 memory accesses
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 */
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static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
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static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
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static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
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static const fftw_real K1_732050807 = FFTW_KONST(+1.732050807568877293527446341505872366942805254);
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/*
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 * Generator Id's :
107 pj 40
 * $Id: fhb_3.c,v 1.2 2003-03-24 11:14:56 pj Exp $
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 * $Id: fhb_3.c,v 1.2 2003-03-24 11:14:56 pj Exp $
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 * $Id: fhb_3.c,v 1.2 2003-03-24 11:14:56 pj Exp $
2 pj 43
 */
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void fftw_hc2hc_backward_3(fftw_real *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_real *X;
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     fftw_real *Y;
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     X = A;
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     Y = A + (3 * iostride);
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     {
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          fftw_real tmp30;
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          fftw_real tmp26;
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          fftw_real tmp27;
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          fftw_real tmp28;
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          fftw_real tmp29;
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          ASSERT_ALIGNED_DOUBLE();
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          tmp29 = Y[-iostride];
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          tmp30 = K1_732050807 * tmp29;
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          tmp26 = X[0];
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          tmp27 = X[iostride];
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          tmp28 = tmp26 - tmp27;
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          X[0] = tmp26 + (K2_000000000 * tmp27);
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          X[iostride] = tmp28 - tmp30;
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          X[2 * iostride] = tmp28 + tmp30;
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     }
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     X = X + dist;
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     Y = Y - dist;
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     for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 2) {
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          fftw_real tmp6;
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          fftw_real tmp9;
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          fftw_real tmp15;
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          fftw_real tmp19;
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          fftw_real tmp10;
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          fftw_real tmp13;
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          fftw_real tmp16;
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          fftw_real tmp20;
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          ASSERT_ALIGNED_DOUBLE();
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          {
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               fftw_real tmp7;
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               fftw_real tmp8;
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               fftw_real tmp11;
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               fftw_real tmp12;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp6 = X[0];
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               tmp7 = X[iostride];
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               tmp8 = Y[-2 * iostride];
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               tmp9 = tmp7 + tmp8;
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               tmp15 = K866025403 * (tmp7 - tmp8);
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               tmp19 = tmp6 - (K500000000 * tmp9);
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               tmp10 = Y[0];
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               tmp11 = Y[-iostride];
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               tmp12 = X[2 * iostride];
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               tmp13 = tmp11 - tmp12;
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               tmp16 = tmp10 - (K500000000 * tmp13);
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               tmp20 = K866025403 * (tmp11 + tmp12);
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          }
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          X[0] = tmp6 + tmp9;
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          {
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               fftw_real tmp23;
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               fftw_real tmp25;
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               fftw_real tmp22;
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               fftw_real tmp24;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp23 = tmp16 - tmp15;
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               tmp25 = tmp19 + tmp20;
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               tmp22 = c_re(W[1]);
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               tmp24 = c_im(W[1]);
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               Y[0] = (tmp22 * tmp23) - (tmp24 * tmp25);
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               X[2 * iostride] = (tmp24 * tmp23) + (tmp22 * tmp25);
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          }
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          Y[-2 * iostride] = tmp10 + tmp13;
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          {
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               fftw_real tmp17;
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               fftw_real tmp21;
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               fftw_real tmp14;
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               fftw_real tmp18;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp17 = tmp15 + tmp16;
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               tmp21 = tmp19 - tmp20;
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               tmp14 = c_re(W[0]);
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               tmp18 = c_im(W[0]);
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               Y[-iostride] = (tmp14 * tmp17) - (tmp18 * tmp21);
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               X[iostride] = (tmp18 * tmp17) + (tmp14 * tmp21);
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          }
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     }
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     if (i == m) {
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          fftw_real tmp5;
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          fftw_real tmp1;
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          fftw_real tmp2;
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          fftw_real tmp3;
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          fftw_real tmp4;
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          ASSERT_ALIGNED_DOUBLE();
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          tmp4 = Y[0];
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          tmp5 = K1_732050807 * tmp4;
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          tmp1 = X[iostride];
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          tmp2 = X[0];
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          tmp3 = tmp2 - tmp1;
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          X[0] = tmp1 + (K2_000000000 * tmp2);
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          X[2 * iostride] = -(tmp3 + tmp5);
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          X[iostride] = tmp3 - tmp5;
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     }
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}
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static const int twiddle_order[] =
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{1, 2};
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fftw_codelet_desc fftw_hc2hc_backward_3_desc =
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{
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     "fftw_hc2hc_backward_3",
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     (void (*)()) fftw_hc2hc_backward_3,
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     3,
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     FFTW_BACKWARD,
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     FFTW_HC2HC,
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     80,
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     2,
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     twiddle_order,
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};