/*
 * Copyright (c) 1997-1999 Massachusetts Institute of Technology
 * Copyright (c) 2000-2002 Stefan Kral
 *
 * 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 Feb 19 15:31:05 CET 2002 */

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



/* Generated by: ./genfft_orig -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-backward 6 */

/*
 * This function contains 72 FP additions, 38 FP multiplications,
 * (or, 54 additions, 20 multiplications, 18 fused multiply/add),
 * 25 stack variables, and 48 memory accesses
 */
static const fftw_real K500000000 =
FFTW_KONST (+0.500000000000000000000000000000000000000000000);
static const fftw_real K866025403 =
FFTW_KONST (+0.866025403784438646763723170752936183471402627);
static const fftw_real K2_000000000 =
FFTW_KONST (+2.000000000000000000000000000000000000000000000);
static const fftw_real K1_732050807 =
FFTW_KONST (+1.732050807568877293527446341505872366942805254);


/*
 * Generator Id's : 
 * $Id: exprdag.ml,v 1.41 1999/05/26 15:44:14 fftw Exp $
 * $Id: fft.ml,v 1.43 1999/05/17 19:44:18 fftw Exp $
 * $Id: to_c.ml,v 1.25 1999/10/26 21:41:32 stevenj Exp $
 */

void
fftw_hc2hc_backward_6 (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 + (6 * iostride);
     {
	  fftw_real tmp71;
	  fftw_real tmp75;
	  fftw_real tmp80;
	  fftw_real tmp82;
	  fftw_real tmp74;
	  fftw_real tmp76;
	  fftw_real tmp69;
	  fftw_real tmp70;
	  fftw_real tmp77;
	  fftw_real tmp81;
	  tmp69 = X[0];
	  tmp70 = X[3 * iostride];
	  tmp71 = tmp69 - tmp70;
	  tmp75 = tmp69 + tmp70;
	  {
	       fftw_real tmp78;
	       fftw_real tmp79;
	       fftw_real tmp72;
	       fftw_real tmp73;
	       tmp78 = Y[-2 * iostride];
	       tmp79 = Y[-iostride];
	       tmp80 = K1_732050807 * (tmp78 + tmp79);
	       tmp82 = K1_732050807 * (tmp78 - tmp79);
	       tmp72 = X[2 * iostride];
	       tmp73 = X[iostride];
	       tmp74 = tmp72 - tmp73;
	       tmp76 = tmp72 + tmp73;
	  }
	  X[3 * iostride] = tmp71 + (K2_000000000 * tmp74);
	  tmp77 = tmp71 - tmp74;
	  X[iostride] = tmp77 - tmp80;
	  X[5 * iostride] = tmp77 + tmp80;
	  X[0] = tmp75 + (K2_000000000 * tmp76);
	  tmp81 = tmp75 - tmp76;
	  X[2 * iostride] = tmp81 + tmp82;
	  X[4 * iostride] = tmp81 - tmp82;
     }
     X = X + dist;
     Y = Y - dist;
     for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 5)
       {
	    fftw_real tmp15;
	    fftw_real tmp46;
	    fftw_real tmp25;
	    fftw_real tmp52;
	    fftw_real tmp22;
	    fftw_real tmp35;
	    fftw_real tmp49;
	    fftw_real tmp62;
	    fftw_real tmp32;
	    fftw_real tmp39;
	    fftw_real tmp55;
	    fftw_real tmp59;
	    {
		 fftw_real tmp13;
		 fftw_real tmp14;
		 fftw_real tmp23;
		 fftw_real tmp24;
		 tmp13 = X[0];
		 tmp14 = Y[-3 * iostride];
		 tmp15 = tmp13 + tmp14;
		 tmp46 = tmp13 - tmp14;
		 tmp23 = Y[0];
		 tmp24 = X[3 * iostride];
		 tmp25 = tmp23 - tmp24;
		 tmp52 = tmp23 + tmp24;
	    }
	    {
		 fftw_real tmp18;
		 fftw_real tmp47;
		 fftw_real tmp21;
		 fftw_real tmp48;
		 {
		      fftw_real tmp16;
		      fftw_real tmp17;
		      fftw_real tmp19;
		      fftw_real tmp20;
		      tmp16 = X[2 * iostride];
		      tmp17 = Y[-5 * iostride];
		      tmp18 = tmp16 + tmp17;
		      tmp47 = tmp16 - tmp17;
		      tmp19 = Y[-4 * iostride];
		      tmp20 = X[iostride];
		      tmp21 = tmp19 + tmp20;
		      tmp48 = tmp19 - tmp20;
		 }
		 tmp22 = tmp18 + tmp21;
		 tmp35 = K866025403 * (tmp18 - tmp21);
		 tmp49 = tmp47 + tmp48;
		 tmp62 = K866025403 * (tmp47 - tmp48);
	    }
	    {
		 fftw_real tmp28;
		 fftw_real tmp54;
		 fftw_real tmp31;
		 fftw_real tmp53;
		 {
		      fftw_real tmp26;
		      fftw_real tmp27;
		      fftw_real tmp29;
		      fftw_real tmp30;
		      tmp26 = Y[-2 * iostride];
		      tmp27 = X[5 * iostride];
		      tmp28 = tmp26 - tmp27;
		      tmp54 = tmp26 + tmp27;
		      tmp29 = Y[-iostride];
		      tmp30 = X[4 * iostride];
		      tmp31 = tmp29 - tmp30;
		      tmp53 = tmp29 + tmp30;
		 }
		 tmp32 = tmp28 + tmp31;
		 tmp39 = K866025403 * (tmp31 - tmp28);
		 tmp55 = tmp53 - tmp54;
		 tmp59 = K866025403 * (tmp54 + tmp53);
	    }
	    X[0] = tmp15 + tmp22;
	    {
		 fftw_real tmp36;
		 fftw_real tmp42;
		 fftw_real tmp40;
		 fftw_real tmp44;
		 fftw_real tmp34;
		 fftw_real tmp38;
		 tmp34 = tmp25 - (K500000000 * tmp32);
		 tmp36 = tmp34 - tmp35;
		 tmp42 = tmp35 + tmp34;
		 tmp38 = tmp15 - (K500000000 * tmp22);
		 tmp40 = tmp38 - tmp39;
		 tmp44 = tmp38 + tmp39;
		 {
		      fftw_real tmp33;
		      fftw_real tmp37;
		      fftw_real tmp41;
		      fftw_real tmp43;
		      tmp33 = c_re (W[1]);
		      tmp37 = c_im (W[1]);
		      Y[-3 * iostride] = (tmp33 * tmp36) - (tmp37 * tmp40);
		      X[2 * iostride] = (tmp37 * tmp36) + (tmp33 * tmp40);
		      tmp41 = c_re (W[3]);
		      tmp43 = c_im (W[3]);
		      Y[-iostride] = (tmp41 * tmp42) - (tmp43 * tmp44);
		      X[4 * iostride] = (tmp43 * tmp42) + (tmp41 * tmp44);
		 }
	    }
	    Y[-5 * iostride] = tmp25 + tmp32;
	    {
		 fftw_real tmp50;
		 fftw_real tmp56;
		 fftw_real tmp45;
		 fftw_real tmp51;
		 tmp50 = tmp46 + tmp49;
		 tmp56 = tmp52 - tmp55;
		 tmp45 = c_re (W[2]);
		 tmp51 = c_im (W[2]);
		 X[3 * iostride] = (tmp45 * tmp50) + (tmp51 * tmp56);
		 Y[-2 * iostride] = (tmp45 * tmp56) - (tmp51 * tmp50);
	    }
	    {
		 fftw_real tmp60;
		 fftw_real tmp66;
		 fftw_real tmp64;
		 fftw_real tmp68;
		 fftw_real tmp58;
		 fftw_real tmp63;
		 tmp58 = tmp46 - (K500000000 * tmp49);
		 tmp60 = tmp58 - tmp59;
		 tmp66 = tmp58 + tmp59;
		 tmp63 = tmp52 + (K500000000 * tmp55);
		 tmp64 = tmp62 + tmp63;
		 tmp68 = tmp63 - tmp62;
		 {
		      fftw_real tmp57;
		      fftw_real tmp61;
		      fftw_real tmp65;
		      fftw_real tmp67;
		      tmp57 = c_re (W[0]);
		      tmp61 = c_im (W[0]);
		      X[iostride] = (tmp57 * tmp60) + (tmp61 * tmp64);
		      Y[-4 * iostride] = (tmp57 * tmp64) - (tmp61 * tmp60);
		      tmp65 = c_re (W[4]);
		      tmp67 = c_im (W[4]);
		      X[5 * iostride] = (tmp65 * tmp66) + (tmp67 * tmp68);
		      Y[0] = (tmp65 * tmp68) - (tmp67 * tmp66);
		 }
	    }
       }
     if (i == m)
       {
	    fftw_real tmp1;
	    fftw_real tmp6;
	    fftw_real tmp4;
	    fftw_real tmp5;
	    fftw_real tmp9;
	    fftw_real tmp11;
	    fftw_real tmp12;
	    fftw_real tmp10;
	    tmp1 = X[iostride];
	    tmp6 = Y[-iostride];
	    {
		 fftw_real tmp2;
		 fftw_real tmp3;
		 fftw_real tmp7;
		 fftw_real tmp8;
		 tmp2 = X[2 * iostride];
		 tmp3 = X[0];
		 tmp4 = tmp2 + tmp3;
		 tmp5 = K1_732050807 * (tmp2 - tmp3);
		 tmp7 = Y[-2 * iostride];
		 tmp8 = Y[0];
		 tmp9 = tmp7 + tmp8;
		 tmp11 = K1_732050807 * (tmp7 - tmp8);
	    }
	    X[0] = K2_000000000 * (tmp1 + tmp4);
	    tmp12 = (K2_000000000 * tmp1) - tmp4;
	    X[2 * iostride] = tmp11 - tmp12;
	    X[4 * iostride] = tmp12 + tmp11;
	    X[3 * iostride] = K2_000000000 * (tmp6 - tmp9);
	    tmp10 = (K2_000000000 * tmp6) + tmp9;
	    X[iostride] = -(tmp5 + tmp10);
	    X[5 * iostride] = tmp5 - tmp10;
       }
}


static const int twiddle_order[] = { 1, 2, 3, 4, 5 };
fftw_codelet_desc fftw_hc2hc_backward_6_desc = {
     "fftw_hc2hc_backward_6",
     (void (*)()) fftw_hc2hc_backward_6,
     6,
     FFTW_BACKWARD,
     FFTW_HC2HC,
     146,
     5,
     twiddle_order,
};
