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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 13:55:29 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 -hc2hc-forward 4 */
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/*
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 * This function contains 34 FP additions, 14 FP multiplications,
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 * (or, 28 additions, 8 multiplications, 6 fused multiply/add),
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 * 15 stack variables, and 32 memory accesses
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 */
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static const fftw_real K707106781 = FFTW_KONST(+0.707106781186547524400844362104849039284835938);
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/*
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 * Generator Id's :
107 pj 37
 * $Id: fhf_4.c,v 1.2 2003-03-24 11:14:58 pj Exp $
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 * $Id: fhf_4.c,v 1.2 2003-03-24 11:14:58 pj Exp $
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 * $Id: fhf_4.c,v 1.2 2003-03-24 11:14:58 pj Exp $
2 pj 40
 */
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void fftw_hc2hc_forward_4(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 + (4 * iostride);
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     {
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          fftw_real tmp35;
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          fftw_real tmp36;
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          fftw_real tmp37;
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          fftw_real tmp38;
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          fftw_real tmp39;
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          fftw_real tmp40;
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          ASSERT_ALIGNED_DOUBLE();
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          tmp35 = X[0];
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          tmp36 = X[2 * iostride];
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          tmp37 = tmp35 + tmp36;
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          tmp38 = X[iostride];
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          tmp39 = X[3 * iostride];
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          tmp40 = tmp38 + tmp39;
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          X[iostride] = tmp35 - tmp36;
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          Y[-iostride] = -(tmp38 - tmp39);
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          X[2 * iostride] = tmp37 - tmp40;
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          X[0] = tmp37 + tmp40;
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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 + 3) {
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          fftw_real tmp7;
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          fftw_real tmp30;
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          fftw_real tmp12;
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          fftw_real tmp29;
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          fftw_real tmp18;
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          fftw_real tmp26;
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          fftw_real tmp23;
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          fftw_real tmp27;
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          ASSERT_ALIGNED_DOUBLE();
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          tmp7 = X[0];
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          tmp30 = Y[-3 * iostride];
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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 = X[2 * iostride];
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               tmp11 = Y[-iostride];
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               tmp8 = c_re(W[1]);
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               tmp10 = c_im(W[1]);
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               tmp12 = (tmp8 * tmp9) - (tmp10 * tmp11);
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               tmp29 = (tmp10 * tmp9) + (tmp8 * tmp11);
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          }
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          {
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               fftw_real tmp15;
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               fftw_real tmp17;
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               fftw_real tmp14;
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               fftw_real tmp16;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp15 = X[iostride];
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               tmp17 = Y[-2 * iostride];
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               tmp14 = c_re(W[0]);
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               tmp16 = c_im(W[0]);
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               tmp18 = (tmp14 * tmp15) - (tmp16 * tmp17);
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               tmp26 = (tmp16 * tmp15) + (tmp14 * tmp17);
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          }
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          {
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               fftw_real tmp20;
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               fftw_real tmp22;
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               fftw_real tmp19;
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               fftw_real tmp21;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp20 = X[3 * iostride];
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               tmp22 = Y[0];
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               tmp19 = c_re(W[2]);
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               tmp21 = c_im(W[2]);
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               tmp23 = (tmp19 * tmp20) - (tmp21 * tmp22);
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               tmp27 = (tmp21 * tmp20) + (tmp19 * tmp22);
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          }
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          {
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               fftw_real tmp13;
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               fftw_real tmp24;
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               fftw_real tmp33;
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               fftw_real tmp34;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp13 = tmp7 + tmp12;
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               tmp24 = tmp18 + tmp23;
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               Y[-2 * iostride] = tmp13 - tmp24;
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               X[0] = tmp13 + tmp24;
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               tmp33 = tmp18 - tmp23;
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               tmp34 = tmp30 - tmp29;
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               X[3 * iostride] = -(tmp33 + tmp34);
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               Y[-iostride] = tmp34 - tmp33;
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          }
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          {
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               fftw_real tmp31;
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               fftw_real tmp32;
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               fftw_real tmp25;
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               fftw_real tmp28;
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               ASSERT_ALIGNED_DOUBLE();
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               tmp31 = tmp29 + tmp30;
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               tmp32 = tmp26 + tmp27;
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               X[2 * iostride] = -(tmp31 - tmp32);
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               Y[0] = tmp32 + tmp31;
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               tmp25 = tmp7 - tmp12;
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               tmp28 = tmp26 - tmp27;
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               Y[-3 * iostride] = tmp25 - tmp28;
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               X[iostride] = tmp25 + tmp28;
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          }
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     }
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     if (i == m) {
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          fftw_real tmp1;
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          fftw_real tmp6;
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          fftw_real tmp4;
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          fftw_real tmp5;
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          fftw_real tmp2;
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          fftw_real tmp3;
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          ASSERT_ALIGNED_DOUBLE();
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          tmp1 = X[0];
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          tmp6 = X[2 * iostride];
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          tmp2 = X[iostride];
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          tmp3 = X[3 * iostride];
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          tmp4 = K707106781 * (tmp2 - tmp3);
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          tmp5 = K707106781 * (tmp2 + tmp3);
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          X[iostride] = tmp1 - tmp4;
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          X[0] = tmp1 + tmp4;
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          Y[0] = -(tmp5 + tmp6);
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          Y[-iostride] = tmp6 - tmp5;
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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 fftw_hc2hc_forward_4_desc =
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{
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     "fftw_hc2hc_forward_4",
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     (void (*)()) fftw_hc2hc_forward_4,
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     4,
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     FFTW_FORWARD,
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     FFTW_HC2HC,
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     91,
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     3,
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     twiddle_order,
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};