src/fftw/frc_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 13:54:36 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 12 */
  27
  28 /*
  29  * This function contains 38 FP additions, 8 FP multiplications,
  30  * (or, 34 additions, 4 multiplications, 4 fused multiply/add),
  31  * 18 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_real2hc_12(const fftw_real *input, fftw_real *real_output, fftw_real *imag_output, int istride, int real_ostride, int imag_ostride)
  44 {
  45      fftw_real tmp5;
  46      fftw_real tmp25;
  47      fftw_real tmp11;
  48      fftw_real tmp23;
  49      fftw_real tmp30;
  50      fftw_real tmp35;
  51      fftw_real tmp10;
  52      fftw_real tmp26;
  53      fftw_real tmp12;
  54      fftw_real tmp18;
  55      fftw_real tmp29;
  56      fftw_real tmp34;
  57      fftw_real tmp31;
  58      fftw_real tmp32;
  59      ASSERT_ALIGNED_DOUBLE();
  60      {
  61           fftw_real tmp1;
  62           fftw_real tmp2;
  63           fftw_real tmp3;
  64           fftw_real tmp4;
  65           ASSERT_ALIGNED_DOUBLE();
  66           tmp1 = input[0];
  67           tmp2 = input[4 * istride];
  68           tmp3 = input[8 * istride];
  69           tmp4 = tmp2 + tmp3;
  70           tmp5 = tmp1 + tmp4;
  71           tmp25 = tmp1 - (K500000000 * tmp4);
  72           tmp11 = tmp3 - tmp2;
  73      }
  74      {
  75           fftw_real tmp19;
  76           fftw_real tmp20;
  77           fftw_real tmp21;
  78           fftw_real tmp22;
  79           ASSERT_ALIGNED_DOUBLE();
  80           tmp19 = input[9 * istride];
  81           tmp20 = input[istride];
  82           tmp21 = input[5 * istride];
  83           tmp22 = tmp20 + tmp21;
  84           tmp23 = tmp19 - (K500000000 * tmp22);
  85           tmp30 = tmp19 + tmp22;
  86           tmp35 = tmp21 - tmp20;
  87      }
  88      {
  89           fftw_real tmp6;
  90           fftw_real tmp7;
  91           fftw_real tmp8;
  92           fftw_real tmp9;
  93           ASSERT_ALIGNED_DOUBLE();
  94           tmp6 = input[6 * istride];
  95           tmp7 = input[10 * istride];
  96           tmp8 = input[2 * istride];
  97           tmp9 = tmp7 + tmp8;
  98           tmp10 = tmp6 + tmp9;
  99           tmp26 = tmp6 - (K500000000 * tmp9);
 100           tmp12 = tmp8 - tmp7;
 101      }
 102      {
 103           fftw_real tmp14;
 104           fftw_real tmp15;
 105           fftw_real tmp16;
 106           fftw_real tmp17;
 107           ASSERT_ALIGNED_DOUBLE();
 108           tmp14 = input[3 * istride];
 109           tmp15 = input[7 * istride];
 110           tmp16 = input[11 * istride];
 111           tmp17 = tmp15 + tmp16;
 112           tmp18 = tmp14 - (K500000000 * tmp17);
 113           tmp29 = tmp14 + tmp17;
 114           tmp34 = tmp16 - tmp15;
 115      }
 116      real_output[3 * real_ostride] = tmp5 - tmp10;
 117      imag_output[3 * imag_ostride] = tmp29 - tmp30;
 118      tmp31 = tmp5 + tmp10;
 119      tmp32 = tmp29 + tmp30;
 120      real_output[6 * real_ostride] = tmp31 - tmp32;
 121      real_output[0] = tmp31 + tmp32;
 122      {
 123           fftw_real tmp37;
 124           fftw_real tmp38;
 125           fftw_real tmp33;
 126           fftw_real tmp36;
 127           ASSERT_ALIGNED_DOUBLE();
 128           tmp37 = tmp34 + tmp35;
 129           tmp38 = tmp11 + tmp12;
 130           imag_output[2 * imag_ostride] = K866025403 * (tmp37 - tmp38);
 131           imag_output[4 * imag_ostride] = K866025403 * (tmp38 + tmp37);
 132           tmp33 = tmp25 - tmp26;
 133           tmp36 = K866025403 * (tmp34 - tmp35);
 134           real_output[5 * real_ostride] = tmp33 - tmp36;
 135           real_output[real_ostride] = tmp33 + tmp36;
 136      }
 137      {
 138           fftw_real tmp27;
 139           fftw_real tmp28;
 140           fftw_real tmp13;
 141           fftw_real tmp24;
 142           ASSERT_ALIGNED_DOUBLE();
 143           tmp27 = tmp25 + tmp26;
 144           tmp28 = tmp18 + tmp23;
 145           real_output[2 * real_ostride] = tmp27 - tmp28;
 146           real_output[4 * real_ostride] = tmp27 + tmp28;
 147           tmp13 = K866025403 * (tmp11 - tmp12);
 148           tmp24 = tmp18 - tmp23;
 149           imag_output[imag_ostride] = tmp13 - tmp24;
 150           imag_output[5 * imag_ostride] = -(tmp13 + tmp24);
 151      }
 152 }
 153
 154 fftw_codelet_desc fftw_real2hc_12_desc =
 155 {
 156      "fftw_real2hc_12",
 157      (void (*)()) fftw_real2hc_12,
 158      12,
 159      FFTW_FORWARD,
 160      FFTW_REAL2HC,
 161      266,
 162      0,
 163      (const int *) 0,
 164 };