src/fftw/frc_5.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 13:54:33 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 5 */
  27
  28 /*
  29  * This function contains 12 FP additions, 6 FP multiplications,
  30  * (or, 9 additions, 3 multiplications, 3 fused multiply/add),
  31  * 12 stack variables, and 10 memory accesses
  32  */
  33 static const fftw_real K250000000 = FFTW_KONST(+0.250000000000000000000000000000000000000000000);
  34 static const fftw_real K559016994 = FFTW_KONST(+0.559016994374947424102293417182819058860154590);
  35 static const fftw_real K587785252 = FFTW_KONST(+0.587785252292473129168705954639072768597652438);
  36 static const fftw_real K951056516 = FFTW_KONST(+0.951056516295153572116439333379382143405698634);
  37
  38 /*
  39  * Generator Id's :
  40  * $Id$
  41  * $Id$
  42  * $Id$
  43  */
  44
  45 void fftw_real2hc_5(const fftw_real *input, fftw_real *real_output, fftw_real *imag_output, int istride, int real_ostride, int imag_ostride)
  46 {
  47      fftw_real tmp10;
  48      fftw_real tmp7;
  49      fftw_real tmp8;
  50      fftw_real tmp3;
  51      fftw_real tmp11;
  52      fftw_real tmp6;
  53      fftw_real tmp9;
  54      fftw_real tmp12;
  55      ASSERT_ALIGNED_DOUBLE();
  56      tmp10 = input[0];
  57      {
  58           fftw_real tmp1;
  59           fftw_real tmp2;
  60           fftw_real tmp4;
  61           fftw_real tmp5;
  62           ASSERT_ALIGNED_DOUBLE();
  63           tmp1 = input[istride];
  64           tmp2 = input[4 * istride];
  65           tmp7 = tmp1 + tmp2;
  66           tmp4 = input[2 * istride];
  67           tmp5 = input[3 * istride];
  68           tmp8 = tmp4 + tmp5;
  69           tmp3 = tmp1 - tmp2;
  70           tmp11 = tmp7 + tmp8;
  71           tmp6 = tmp4 - tmp5;
  72      }
  73      imag_output[imag_ostride] = -((K951056516 * tmp3) + (K587785252 * tmp6));
  74      imag_output[2 * imag_ostride] = (K951056516 * tmp6) - (K587785252 * tmp3);
  75      real_output[0] = tmp10 + tmp11;
  76      tmp9 = K559016994 * (tmp7 - tmp8);
  77      tmp12 = tmp10 - (K250000000 * tmp11);
  78      real_output[real_ostride] = tmp9 + tmp12;
  79      real_output[2 * real_ostride] = tmp12 - tmp9;
  80 }
  81
  82 fftw_codelet_desc fftw_real2hc_5_desc =
  83 {
  84      "fftw_real2hc_5",
  85      (void (*)()) fftw_real2hc_5,
  86      5,
  87      FFTW_FORWARD,
  88      FFTW_REAL2HC,
  89      112,
  90      0,
  91      (const int *) 0,
  92 };