src/fftw/fcr_7.c

   1 /*
   2  * Copyright (c) 1997-1999 Massachusetts Institute of Technology
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20 /* This file was automatically generated --- DO NOT EDIT */
  21 /* Generated on Tue May 18 13:55:06 EDT 1999 */
  22
  23 #include <fftw-int.h>
  24 #include <fftw.h>
  25
  26 /* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2real 7 */
  27
  28 /*
  29  * This function contains 24 FP additions, 19 FP multiplications,
  30  * (or, 23 additions, 18 multiplications, 1 fused multiply/add),
  31  * 13 stack variables, and 14 memory accesses
  32  */
  33 static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
  34 static const fftw_real K1_801937735 = FFTW_KONST(+1.801937735804838252472204639014890102331838324);
  35 static const fftw_real K445041867 = FFTW_KONST(+0.445041867912628808577805128993589518932711138);
  36 static const fftw_real K1_246979603 = FFTW_KONST(+1.246979603717467061050009768008479621264549462);
  37 static const fftw_real K867767478 = FFTW_KONST(+0.867767478235116240951536665696717509219981456);
  38 static const fftw_real K1_949855824 = FFTW_KONST(+1.949855824363647214036263365987862434465571601);
  39 static const fftw_real K1_563662964 = FFTW_KONST(+1.563662964936059617416889053348115500464669037);
  40
  41 /*
  42  * Generator Id's :
  43  * $Id$
  44  * $Id$
  45  * $Id$
  46  */
  47
  48 void fftw_hc2real_7(const fftw_real *real_input, const fftw_real *imag_input, fftw_real *output, int real_istride, int imag_istride, int ostride)
  49 {
  50      fftw_real tmp9;
  51      fftw_real tmp13;
  52      fftw_real tmp11;
  53      fftw_real tmp1;
  54      fftw_real tmp4;
  55      fftw_real tmp2;
  56      fftw_real tmp3;
  57      fftw_real tmp5;
  58      fftw_real tmp12;
  59      fftw_real tmp10;
  60      fftw_real tmp6;
  61      fftw_real tmp8;
  62      fftw_real tmp7;
  63      ASSERT_ALIGNED_DOUBLE();
  64      tmp6 = imag_input[2 * imag_istride];
  65      tmp8 = imag_input[imag_istride];
  66      tmp7 = imag_input[3 * imag_istride];
  67      tmp9 = (K1_563662964 * tmp6) - (K1_949855824 * tmp7) - (K867767478 * tmp8);
  68      tmp13 = (K867767478 * tmp6) + (K1_563662964 * tmp7) - (K1_949855824 * tmp8);
  69      tmp11 = (K1_563662964 * tmp8) + (K1_949855824 * tmp6) + (K867767478 * tmp7);
  70      tmp1 = real_input[0];
  71      tmp4 = real_input[3 * real_istride];
  72      tmp2 = real_input[real_istride];
  73      tmp3 = real_input[2 * real_istride];
  74      tmp5 = tmp1 + (K1_246979603 * tmp3) - (K445041867 * tmp4) - (K1_801937735 * tmp2);
  75      tmp12 = tmp1 + (K1_246979603 * tmp4) - (K1_801937735 * tmp3) - (K445041867 * tmp2);
  76      tmp10 = tmp1 + (K1_246979603 * tmp2) - (K1_801937735 * tmp4) - (K445041867 * tmp3);
  77      output[4 * ostride] = tmp5 - tmp9;
  78      output[3 * ostride] = tmp5 + tmp9;
  79      output[0] = tmp1 + (K2_000000000 * (tmp2 + tmp3 + tmp4));
  80      output[2 * ostride] = tmp12 + tmp13;
  81      output[5 * ostride] = tmp12 - tmp13;
  82      output[6 * ostride] = tmp10 + tmp11;
  83      output[ostride] = tmp10 - tmp11;
  84 }
  85
  86 fftw_codelet_desc fftw_hc2real_7_desc =
  87 {
  88      "fftw_hc2real_7",
  89      (void (*)()) fftw_hc2real_7,
  90      7,
  91      FFTW_BACKWARD,
  92      FFTW_HC2REAL,
  93      169,
  94      0,
  95      (const int *) 0,
  96 };