src/fftw/fcr_12.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 13:55:07 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 12 */
  27
  28 /*
  29  * This function contains 38 FP additions, 10 FP multiplications,
  30  * (or, 34 additions, 6 multiplications, 4 fused multiply/add),
  31  * 22 stack variables, and 24 memory accesses
  32  */
  33 static const fftw_real K1_732050807 = FFTW_KONST(+1.732050807568877293527446341505872366942805254);
  34 static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
  35
  36 /*
  37  * Generator Id's :
  38  * $Id$
  39  * $Id$
  40  * $Id$
  41  */
  42
  43 void fftw_hc2real_12(const fftw_real *real_input, const fftw_real *imag_input, fftw_real *output, int real_istride, int imag_istride, int ostride)
  44 {
  45      fftw_real tmp8;
  46      fftw_real tmp11;
  47      fftw_real tmp22;
  48      fftw_real tmp36;
  49      fftw_real tmp32;
  50      fftw_real tmp33;
  51      fftw_real tmp25;
  52      fftw_real tmp37;
  53      fftw_real tmp3;
  54      fftw_real tmp27;
  55      fftw_real tmp16;
  56      fftw_real tmp6;
  57      fftw_real tmp28;
  58      fftw_real tmp20;
  59      ASSERT_ALIGNED_DOUBLE();
  60      {
  61           fftw_real tmp9;
  62           fftw_real tmp10;
  63           fftw_real tmp23;
  64           fftw_real tmp24;
  65           ASSERT_ALIGNED_DOUBLE();
  66           tmp8 = real_input[3 * real_istride];
  67           tmp9 = real_input[5 * real_istride];
  68           tmp10 = real_input[real_istride];
  69           tmp11 = tmp9 + tmp10;
  70           tmp22 = (K2_000000000 * tmp8) - tmp11;
  71           tmp36 = K1_732050807 * (tmp9 - tmp10);
  72           tmp32 = imag_input[3 * imag_istride];
  73           tmp23 = imag_input[5 * imag_istride];
  74           tmp24 = imag_input[imag_istride];
  75           tmp33 = tmp23 + tmp24;
  76           tmp25 = K1_732050807 * (tmp23 - tmp24);
  77           tmp37 = (K2_000000000 * tmp32) + tmp33;
  78      }
  79      {
  80           fftw_real tmp15;
  81           fftw_real tmp1;
  82           fftw_real tmp2;
  83           fftw_real tmp13;
  84           fftw_real tmp14;
  85           ASSERT_ALIGNED_DOUBLE();
  86           tmp14 = imag_input[4 * imag_istride];
  87           tmp15 = K1_732050807 * tmp14;
  88           tmp1 = real_input[0];
  89           tmp2 = real_input[4 * real_istride];
  90           tmp13 = tmp1 - tmp2;
  91           tmp3 = tmp1 + (K2_000000000 * tmp2);
  92           tmp27 = tmp13 - tmp15;
  93           tmp16 = tmp13 + tmp15;
  94      }
  95      {
  96           fftw_real tmp19;
  97           fftw_real tmp4;
  98           fftw_real tmp5;
  99           fftw_real tmp17;
 100           fftw_real tmp18;
 101           ASSERT_ALIGNED_DOUBLE();
 102           tmp18 = imag_input[2 * imag_istride];
 103           tmp19 = K1_732050807 * tmp18;
 104           tmp4 = real_input[6 * real_istride];
 105           tmp5 = real_input[2 * real_istride];
 106           tmp17 = tmp4 - tmp5;
 107           tmp6 = tmp4 + (K2_000000000 * tmp5);
 108           tmp28 = tmp17 + tmp19;
 109           tmp20 = tmp17 - tmp19;
 110      }
 111      {
 112           fftw_real tmp7;
 113           fftw_real tmp12;
 114           fftw_real tmp39;
 115           fftw_real tmp40;
 116           ASSERT_ALIGNED_DOUBLE();
 117           tmp7 = tmp3 + tmp6;
 118           tmp12 = K2_000000000 * (tmp8 + tmp11);
 119           output[6 * ostride] = tmp7 - tmp12;
 120           output[0] = tmp7 + tmp12;
 121           {
 122                fftw_real tmp31;
 123                fftw_real tmp34;
 124                fftw_real tmp21;
 125                fftw_real tmp26;
 126                ASSERT_ALIGNED_DOUBLE();
 127                tmp31 = tmp3 - tmp6;
 128                tmp34 = K2_000000000 * (tmp32 - tmp33);
 129                output[9 * ostride] = tmp31 - tmp34;
 130                output[3 * ostride] = tmp31 + tmp34;
 131                tmp21 = tmp16 + tmp20;
 132                tmp26 = tmp22 - tmp25;
 133                output[2 * ostride] = tmp21 - tmp26;
 134                output[8 * ostride] = tmp21 + tmp26;
 135           }
 136           tmp39 = tmp16 - tmp20;
 137           tmp40 = tmp37 - tmp36;
 138           output[5 * ostride] = tmp39 - tmp40;
 139           output[11 * ostride] = tmp39 + tmp40;
 140           {
 141                fftw_real tmp35;
 142                fftw_real tmp38;
 143                fftw_real tmp29;
 144                fftw_real tmp30;
 145                ASSERT_ALIGNED_DOUBLE();
 146                tmp35 = tmp27 - tmp28;
 147                tmp38 = tmp36 + tmp37;
 148                output[ostride] = tmp35 - tmp38;
 149                output[7 * ostride] = tmp35 + tmp38;
 150                tmp29 = tmp27 + tmp28;
 151                tmp30 = tmp22 + tmp25;
 152                output[10 * ostride] = tmp29 - tmp30;
 153                output[4 * ostride] = tmp29 + tmp30;
 154           }
 155      }
 156 }
 157
 158 fftw_codelet_desc fftw_hc2real_12_desc =
 159 {
 160      "fftw_hc2real_12",
 161      (void (*)()) fftw_hc2real_12,
 162      12,
 163      FFTW_BACKWARD,
 164      FFTW_HC2REAL,
 165      279,
 166      0,
 167      (const int *) 0,
 168 };