src/fftw/ftwi_6.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 13:55:47 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 -twiddleinv 6 */
  27
  28 /*
  29  * This function contains 46 FP additions, 28 FP multiplications,
  30  * (or, 32 additions, 14 multiplications, 14 fused multiply/add),
  31  * 22 stack variables, and 24 memory accesses
  32  */
  33 static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
  34 static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
  35
  36 /*
  37  * Generator Id's :
  38  * $Id$
  39  * $Id$
  40  * $Id$
  41  */
  42
  43 void fftwi_twiddle_6(fftw_complex *A, const fftw_complex *W, int iostride, int m, int dist)
  44 {
  45      int i;
  46      fftw_complex *inout;
  47      inout = A;
  48      for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 5) {
  49           fftw_real tmp7;
  50           fftw_real tmp31;
  51           fftw_real tmp50;
  52           fftw_real tmp54;
  53           fftw_real tmp29;
  54           fftw_real tmp33;
  55           fftw_real tmp38;
  56           fftw_real tmp44;
  57           fftw_real tmp18;
  58           fftw_real tmp32;
  59           fftw_real tmp41;
  60           fftw_real tmp45;
  61           ASSERT_ALIGNED_DOUBLE();
  62           {
  63                fftw_real tmp1;
  64                fftw_real tmp49;
  65                fftw_real tmp6;
  66                fftw_real tmp48;
  67                ASSERT_ALIGNED_DOUBLE();
  68                tmp1 = c_re(inout[0]);
  69                tmp49 = c_im(inout[0]);
  70                {
  71                     fftw_real tmp3;
  72                     fftw_real tmp5;
  73                     fftw_real tmp2;
  74                     fftw_real tmp4;
  75                     ASSERT_ALIGNED_DOUBLE();
  76                     tmp3 = c_re(inout[3 * iostride]);
  77                     tmp5 = c_im(inout[3 * iostride]);
  78                     tmp2 = c_re(W[2]);
  79                     tmp4 = c_im(W[2]);
  80                     tmp6 = (tmp2 * tmp3) + (tmp4 * tmp5);
  81                     tmp48 = (tmp2 * tmp5) - (tmp4 * tmp3);
  82                }
  83                tmp7 = tmp1 - tmp6;
  84                tmp31 = tmp1 + tmp6;
  85                tmp50 = tmp48 + tmp49;
  86                tmp54 = tmp49 - tmp48;
  87           }
  88           {
  89                fftw_real tmp23;
  90                fftw_real tmp36;
  91                fftw_real tmp28;
  92                fftw_real tmp37;
  93                ASSERT_ALIGNED_DOUBLE();
  94                {
  95                     fftw_real tmp20;
  96                     fftw_real tmp22;
  97                     fftw_real tmp19;
  98                     fftw_real tmp21;
  99                     ASSERT_ALIGNED_DOUBLE();
 100                     tmp20 = c_re(inout[4 * iostride]);
 101                     tmp22 = c_im(inout[4 * iostride]);
 102                     tmp19 = c_re(W[3]);
 103                     tmp21 = c_im(W[3]);
 104                     tmp23 = (tmp19 * tmp20) + (tmp21 * tmp22);
 105                     tmp36 = (tmp19 * tmp22) - (tmp21 * tmp20);
 106                }
 107                {
 108                     fftw_real tmp25;
 109                     fftw_real tmp27;
 110                     fftw_real tmp24;
 111                     fftw_real tmp26;
 112                     ASSERT_ALIGNED_DOUBLE();
 113                     tmp25 = c_re(inout[iostride]);
 114                     tmp27 = c_im(inout[iostride]);
 115                     tmp24 = c_re(W[0]);
 116                     tmp26 = c_im(W[0]);
 117                     tmp28 = (tmp24 * tmp25) + (tmp26 * tmp27);
 118                     tmp37 = (tmp24 * tmp27) - (tmp26 * tmp25);
 119                }
 120                tmp29 = tmp23 - tmp28;
 121                tmp33 = tmp23 + tmp28;
 122                tmp38 = tmp36 - tmp37;
 123                tmp44 = tmp36 + tmp37;
 124           }
 125           {
 126                fftw_real tmp12;
 127                fftw_real tmp39;
 128                fftw_real tmp17;
 129                fftw_real tmp40;
 130                ASSERT_ALIGNED_DOUBLE();
 131                {
 132                     fftw_real tmp9;
 133                     fftw_real tmp11;
 134                     fftw_real tmp8;
 135                     fftw_real tmp10;
 136                     ASSERT_ALIGNED_DOUBLE();
 137                     tmp9 = c_re(inout[2 * iostride]);
 138                     tmp11 = c_im(inout[2 * iostride]);
 139                     tmp8 = c_re(W[1]);
 140                     tmp10 = c_im(W[1]);
 141                     tmp12 = (tmp8 * tmp9) + (tmp10 * tmp11);
 142                     tmp39 = (tmp8 * tmp11) - (tmp10 * tmp9);
 143                }
 144                {
 145                     fftw_real tmp14;
 146                     fftw_real tmp16;
 147                     fftw_real tmp13;
 148                     fftw_real tmp15;
 149                     ASSERT_ALIGNED_DOUBLE();
 150                     tmp14 = c_re(inout[5 * iostride]);
 151                     tmp16 = c_im(inout[5 * iostride]);
 152                     tmp13 = c_re(W[4]);
 153                     tmp15 = c_im(W[4]);
 154                     tmp17 = (tmp13 * tmp14) + (tmp15 * tmp16);
 155                     tmp40 = (tmp13 * tmp16) - (tmp15 * tmp14);
 156                }
 157                tmp18 = tmp12 - tmp17;
 158                tmp32 = tmp12 + tmp17;
 159                tmp41 = tmp39 - tmp40;
 160                tmp45 = tmp39 + tmp40;
 161           }
 162           {
 163                fftw_real tmp42;
 164                fftw_real tmp30;
 165                fftw_real tmp35;
 166                fftw_real tmp53;
 167                fftw_real tmp55;
 168                fftw_real tmp56;
 169                ASSERT_ALIGNED_DOUBLE();
 170                tmp42 = K866025403 * (tmp38 - tmp41);
 171                tmp30 = tmp18 + tmp29;
 172                tmp35 = tmp7 - (K500000000 * tmp30);
 173                c_re(inout[3 * iostride]) = tmp7 + tmp30;
 174                c_re(inout[iostride]) = tmp35 + tmp42;
 175                c_re(inout[5 * iostride]) = tmp35 - tmp42;
 176                tmp53 = K866025403 * (tmp18 - tmp29);
 177                tmp55 = tmp41 + tmp38;
 178                tmp56 = tmp54 - (K500000000 * tmp55);
 179                c_im(inout[iostride]) = tmp53 + tmp56;
 180                c_im(inout[5 * iostride]) = tmp56 - tmp53;
 181                c_im(inout[3 * iostride]) = tmp55 + tmp54;
 182           }
 183           {
 184                fftw_real tmp46;
 185                fftw_real tmp34;
 186                fftw_real tmp43;
 187                fftw_real tmp52;
 188                fftw_real tmp47;
 189                fftw_real tmp51;
 190                ASSERT_ALIGNED_DOUBLE();
 191                tmp46 = K866025403 * (tmp44 - tmp45);
 192                tmp34 = tmp32 + tmp33;
 193                tmp43 = tmp31 - (K500000000 * tmp34);
 194                c_re(inout[0]) = tmp31 + tmp34;
 195                c_re(inout[4 * iostride]) = tmp43 + tmp46;
 196                c_re(inout[2 * iostride]) = tmp43 - tmp46;
 197                tmp52 = K866025403 * (tmp32 - tmp33);
 198                tmp47 = tmp45 + tmp44;
 199                tmp51 = tmp50 - (K500000000 * tmp47);
 200                c_im(inout[0]) = tmp47 + tmp50;
 201                c_im(inout[4 * iostride]) = tmp52 + tmp51;
 202                c_im(inout[2 * iostride]) = tmp51 - tmp52;
 203           }
 204      }
 205 }
 206
 207 static const int twiddle_order[] =
 208 {1, 2, 3, 4, 5};
 209 fftw_codelet_desc fftwi_twiddle_6_desc =
 210 {
 211      "fftwi_twiddle_6",
 212      (void (*)()) fftwi_twiddle_6,
 213      6,
 214      FFTW_BACKWARD,
 215      FFTW_TWIDDLE,
 216      143,
 217      5,
 218      twiddle_order,
 219 };