src/fftw/frc_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 13:54:34 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 -real2hc 7 */
  27
  28 /*
  29  * This function contains 24 FP additions, 18 FP multiplications,
  30  * (or, 24 additions, 18 multiplications, 0 fused multiply/add),
  31  * 13 stack variables, and 14 memory accesses
  32  */
  33 static const fftw_real K222520933 = FFTW_KONST(+0.222520933956314404288902564496794759466355569);
  34 static const fftw_real K900968867 = FFTW_KONST(+0.900968867902419126236102319507445051165919162);
  35 static const fftw_real K623489801 = FFTW_KONST(+0.623489801858733530525004884004239810632274731);
  36 static const fftw_real K433883739 = FFTW_KONST(+0.433883739117558120475768332848358754609990728);
  37 static const fftw_real K781831482 = FFTW_KONST(+0.781831482468029808708444526674057750232334519);
  38 static const fftw_real K974927912 = FFTW_KONST(+0.974927912181823607018131682993931217232785801);
  39
  40 /*
  41  * Generator Id's :
  42  * $Id$
  43  * $Id$
  44  * $Id$
  45  */
  46
  47 void fftw_real2hc_7(const fftw_real *input, fftw_real *real_output, fftw_real *imag_output, int istride, int real_ostride, int imag_ostride)
  48 {
  49      fftw_real tmp1;
  50      fftw_real tmp10;
  51      fftw_real tmp11;
  52      fftw_real tmp4;
  53      fftw_real tmp13;
  54      fftw_real tmp7;
  55      fftw_real tmp12;
  56      fftw_real tmp8;
  57      fftw_real tmp9;
  58      ASSERT_ALIGNED_DOUBLE();
  59      tmp1 = input[0];
  60      tmp8 = input[istride];
  61      tmp9 = input[6 * istride];
  62      tmp10 = tmp8 + tmp9;
  63      tmp11 = tmp9 - tmp8;
  64      {
  65           fftw_real tmp2;
  66           fftw_real tmp3;
  67           fftw_real tmp5;
  68           fftw_real tmp6;
  69           ASSERT_ALIGNED_DOUBLE();
  70           tmp2 = input[2 * istride];
  71           tmp3 = input[5 * istride];
  72           tmp4 = tmp2 + tmp3;
  73           tmp13 = tmp3 - tmp2;
  74           tmp5 = input[3 * istride];
  75           tmp6 = input[4 * istride];
  76           tmp7 = tmp5 + tmp6;
  77           tmp12 = tmp6 - tmp5;
  78      }
  79      imag_output[2 * imag_ostride] = (K974927912 * tmp11) - (K781831482 * tmp12) - (K433883739 * tmp13);
  80      imag_output[imag_ostride] = (K781831482 * tmp11) + (K974927912 * tmp13) + (K433883739 * tmp12);
  81      imag_output[3 * imag_ostride] = (K433883739 * tmp11) + (K974927912 * tmp12) - (K781831482 * tmp13);
  82      real_output[2 * real_ostride] = tmp1 + (K623489801 * tmp7) - (K900968867 * tmp4) - (K222520933 * tmp10);
  83      real_output[real_ostride] = tmp1 + (K623489801 * tmp10) - (K900968867 * tmp7) - (K222520933 * tmp4);
  84      real_output[3 * real_ostride] = tmp1 + (K623489801 * tmp4) - (K222520933 * tmp7) - (K900968867 * tmp10);
  85      real_output[0] = tmp1 + tmp10 + tmp4 + tmp7;
  86 }
  87
  88 fftw_codelet_desc fftw_real2hc_7_desc =
  89 {
  90      "fftw_real2hc_7",
  91      (void (*)()) fftw_real2hc_7,
  92      7,
  93      FFTW_FORWARD,
  94      FFTW_REAL2HC,
  95      156,
  96      0,
  97      (const int *) 0,
  98 };