src/fftw/fn_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 13:54:27 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 -notwiddle 6 */
  27
  28 /*
  29  * This function contains 36 FP additions, 8 FP multiplications,
  30  * (or, 32 additions, 4 multiplications, 4 fused multiply/add),
  31  * 20 stack variables, and 24 memory accesses
  32  */
  33 static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
  34 static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
  35
  36 /*
  37  * Generator Id's :
  38  * $Id$
  39  * $Id$
  40  * $Id$
  41  */
  42
  43 void fftw_no_twiddle_6(const fftw_complex *input, fftw_complex *output, int istride, int ostride)
  44 {
  45      fftw_real tmp3;
  46      fftw_real tmp11;
  47      fftw_real tmp26;
  48      fftw_real tmp33;
  49      fftw_real tmp6;
  50      fftw_real tmp12;
  51      fftw_real tmp9;
  52      fftw_real tmp13;
  53      fftw_real tmp10;
  54      fftw_real tmp14;
  55      fftw_real tmp18;
  56      fftw_real tmp30;
  57      fftw_real tmp21;
  58      fftw_real tmp31;
  59      fftw_real tmp27;
  60      fftw_real tmp34;
  61      ASSERT_ALIGNED_DOUBLE();
  62      {
  63           fftw_real tmp1;
  64           fftw_real tmp2;
  65           fftw_real tmp24;
  66           fftw_real tmp25;
  67           ASSERT_ALIGNED_DOUBLE();
  68           tmp1 = c_re(input[0]);
  69           tmp2 = c_re(input[3 * istride]);
  70           tmp3 = tmp1 - tmp2;
  71           tmp11 = tmp1 + tmp2;
  72           tmp24 = c_im(input[0]);
  73           tmp25 = c_im(input[3 * istride]);
  74           tmp26 = tmp24 - tmp25;
  75           tmp33 = tmp24 + tmp25;
  76      }
  77      {
  78           fftw_real tmp4;
  79           fftw_real tmp5;
  80           fftw_real tmp7;
  81           fftw_real tmp8;
  82           ASSERT_ALIGNED_DOUBLE();
  83           tmp4 = c_re(input[2 * istride]);
  84           tmp5 = c_re(input[5 * istride]);
  85           tmp6 = tmp4 - tmp5;
  86           tmp12 = tmp4 + tmp5;
  87           tmp7 = c_re(input[4 * istride]);
  88           tmp8 = c_re(input[istride]);
  89           tmp9 = tmp7 - tmp8;
  90           tmp13 = tmp7 + tmp8;
  91      }
  92      tmp10 = tmp6 + tmp9;
  93      tmp14 = tmp12 + tmp13;
  94      {
  95           fftw_real tmp16;
  96           fftw_real tmp17;
  97           fftw_real tmp19;
  98           fftw_real tmp20;
  99           ASSERT_ALIGNED_DOUBLE();
 100           tmp16 = c_im(input[2 * istride]);
 101           tmp17 = c_im(input[5 * istride]);
 102           tmp18 = tmp16 - tmp17;
 103           tmp30 = tmp16 + tmp17;
 104           tmp19 = c_im(input[4 * istride]);
 105           tmp20 = c_im(input[istride]);
 106           tmp21 = tmp19 - tmp20;
 107           tmp31 = tmp19 + tmp20;
 108      }
 109      tmp27 = tmp18 + tmp21;
 110      tmp34 = tmp30 + tmp31;
 111      {
 112           fftw_real tmp15;
 113           fftw_real tmp22;
 114           fftw_real tmp29;
 115           fftw_real tmp32;
 116           ASSERT_ALIGNED_DOUBLE();
 117           c_re(output[3 * ostride]) = tmp3 + tmp10;
 118           tmp15 = tmp3 - (K500000000 * tmp10);
 119           tmp22 = K866025403 * (tmp18 - tmp21);
 120           c_re(output[5 * ostride]) = tmp15 - tmp22;
 121           c_re(output[ostride]) = tmp15 + tmp22;
 122           c_re(output[0]) = tmp11 + tmp14;
 123           tmp29 = tmp11 - (K500000000 * tmp14);
 124           tmp32 = K866025403 * (tmp30 - tmp31);
 125           c_re(output[2 * ostride]) = tmp29 - tmp32;
 126           c_re(output[4 * ostride]) = tmp29 + tmp32;
 127      }
 128      {
 129           fftw_real tmp23;
 130           fftw_real tmp28;
 131           fftw_real tmp35;
 132           fftw_real tmp36;
 133           ASSERT_ALIGNED_DOUBLE();
 134           c_im(output[3 * ostride]) = tmp26 + tmp27;
 135           tmp23 = K866025403 * (tmp9 - tmp6);
 136           tmp28 = tmp26 - (K500000000 * tmp27);
 137           c_im(output[ostride]) = tmp23 + tmp28;
 138           c_im(output[5 * ostride]) = tmp28 - tmp23;
 139           c_im(output[0]) = tmp33 + tmp34;
 140           tmp35 = tmp33 - (K500000000 * tmp34);
 141           tmp36 = K866025403 * (tmp13 - tmp12);
 142           c_im(output[2 * ostride]) = tmp35 - tmp36;
 143           c_im(output[4 * ostride]) = tmp36 + tmp35;
 144      }
 145 }
 146
 147 fftw_codelet_desc fftw_no_twiddle_6_desc =
 148 {
 149      "fftw_no_twiddle_6",
 150      (void (*)()) fftw_no_twiddle_6,
 151      6,
 152      FFTW_FORWARD,
 153      FFTW_NOTW,
 154      133,
 155      0,
 156      (const int *) 0,
 157 };