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/*

 * 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 13:55:58 EDT 1999 */

#include <ports/fftw-int.h>

#include <ports/fftw.h>

/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-backward 4 */

/*

 * This function contains 34 FP additions, 18 FP multiplications,

 * (or, 28 additions, 12 multiplications, 6 fused multiply/add),

 * 15 stack variables, and 32 memory accesses

 */

static const fftw_real K1_414213562 = FFTW_KONST(+1.414213562373095048801688724209698078569671875);

static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);

/*

 * Generator Id's :

 * $Id: fhb_4.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $

 * $Id: fhb_4.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $

 * $Id: fhb_4.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $

 */

void fftw_hc2hc_backward_4(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist)

{

     int i;

     fftw_real *X;

     fftw_real *Y;

     X = A;

     Y = A + (4 * iostride);

     {

          fftw_real tmp39;

          fftw_real tmp42;

          fftw_real tmp37;

          fftw_real tmp40;

          ASSERT_ALIGNED_DOUBLE();

          {

               fftw_real tmp38;

               fftw_real tmp41;

               fftw_real tmp35;

               fftw_real tmp36;

               ASSERT_ALIGNED_DOUBLE();

               tmp38 = X[iostride];

               tmp39 = K2_000000000 * tmp38;

               tmp41 = Y[-iostride];

               tmp42 = K2_000000000 * tmp41;

               tmp35 = X[0];

               tmp36 = X[2 * iostride];

               tmp37 = tmp35 + tmp36;

               tmp40 = tmp35 - tmp36;

          }

          X[2 * iostride] = tmp37 - tmp39;

          X[0] = tmp37 + tmp39;

          X[3 * iostride] = tmp40 + tmp42;

          X[iostride] = tmp40 - tmp42;

     }

     X = X + dist;

     Y = Y - dist;

     for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 3) {

          fftw_real tmp9;

          fftw_real tmp28;

          fftw_real tmp18;

          fftw_real tmp25;

          fftw_real tmp12;

          fftw_real tmp24;

          fftw_real tmp21;

          fftw_real tmp29;

          ASSERT_ALIGNED_DOUBLE();

          {

               fftw_real tmp7;

               fftw_real tmp8;

               fftw_real tmp16;

               fftw_real tmp17;

               ASSERT_ALIGNED_DOUBLE();

               tmp7 = X[0];

               tmp8 = Y[-2 * iostride];

               tmp9 = tmp7 + tmp8;

               tmp28 = tmp7 - tmp8;

               tmp16 = Y[0];

               tmp17 = X[2 * iostride];

               tmp18 = tmp16 - tmp17;

               tmp25 = tmp16 + tmp17;

          }

          {

               fftw_real tmp10;

               fftw_real tmp11;

               fftw_real tmp19;

               fftw_real tmp20;

               ASSERT_ALIGNED_DOUBLE();

               tmp10 = X[iostride];

               tmp11 = Y[-3 * iostride];

               tmp12 = tmp10 + tmp11;

               tmp24 = tmp10 - tmp11;

               tmp19 = Y[-iostride];

               tmp20 = X[3 * iostride];

               tmp21 = tmp19 - tmp20;

               tmp29 = tmp19 + tmp20;

          }

          X[0] = tmp9 + tmp12;

          {

               fftw_real tmp14;

               fftw_real tmp22;

               fftw_real tmp13;

               fftw_real tmp15;

               ASSERT_ALIGNED_DOUBLE();

               tmp14 = tmp9 - tmp12;

               tmp22 = tmp18 - tmp21;

               tmp13 = c_re(W[1]);

               tmp15 = c_im(W[1]);

               X[2 * iostride] = (tmp13 * tmp14) + (tmp15 * tmp22);

               Y[-iostride] = (tmp13 * tmp22) - (tmp15 * tmp14);

          }

          Y[-3 * iostride] = tmp18 + tmp21;

          {

               fftw_real tmp26;

               fftw_real tmp30;

               fftw_real tmp23;

               fftw_real tmp27;

               ASSERT_ALIGNED_DOUBLE();

               tmp26 = tmp24 + tmp25;

               tmp30 = tmp28 - tmp29;

               tmp23 = c_re(W[0]);

               tmp27 = c_im(W[0]);

               Y[-2 * iostride] = (tmp23 * tmp26) - (tmp27 * tmp30);

               X[iostride] = (tmp27 * tmp26) + (tmp23 * tmp30);

          }

          {

               fftw_real tmp32;

               fftw_real tmp34;

               fftw_real tmp31;

               fftw_real tmp33;

               ASSERT_ALIGNED_DOUBLE();

               tmp32 = tmp25 - tmp24;

               tmp34 = tmp28 + tmp29;

               tmp31 = c_re(W[2]);

               tmp33 = c_im(W[2]);

               Y[0] = (tmp31 * tmp32) - (tmp33 * tmp34);

               X[3 * iostride] = (tmp33 * tmp32) + (tmp31 * tmp34);

          }

     }

     if (i == m) {

          fftw_real tmp1;

          fftw_real tmp2;

          fftw_real tmp3;

          fftw_real tmp4;

          fftw_real tmp5;

          fftw_real tmp6;

          ASSERT_ALIGNED_DOUBLE();

          tmp1 = X[0];

          tmp2 = X[iostride];

          tmp3 = tmp1 - tmp2;

          tmp4 = Y[0];

          tmp5 = Y[-iostride];

          tmp6 = tmp4 + tmp5;

          X[0] = K2_000000000 * (tmp1 + tmp2);

          X[2 * iostride] = -(K2_000000000 * (tmp4 - tmp5));

          X[iostride] = K1_414213562 * (tmp3 - tmp6);

          X[3 * iostride] = -(K1_414213562 * (tmp3 + tmp6));

     }

}

static const int twiddle_order[] =

{1, 2, 3};

fftw_codelet_desc fftw_hc2hc_backward_4_desc =

{

     "fftw_hc2hc_backward_4",

     (void (*)()) fftw_hc2hc_backward_4,

     4,

     FFTW_BACKWARD,

     FFTW_HC2HC,

     102,

     3,

     twiddle_order,

};