src/fftw/fcr_9.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 13:55:06 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 9 */
  27
  28 /*
  29  * This function contains 32 FP additions, 18 FP multiplications,
  30  * (or, 22 additions, 8 multiplications, 10 fused multiply/add),
  31  * 22 stack variables, and 18 memory accesses
  32  */
  33 static const fftw_real K984807753 = FFTW_KONST(+0.984807753012208059366743024589523013670643252);
  34 static const fftw_real K173648177 = FFTW_KONST(+0.173648177666930348851716626769314796000375677);
  35 static const fftw_real K300767466 = FFTW_KONST(+0.300767466360870593278543795225003852144476517);
  36 static const fftw_real K1_705737063 = FFTW_KONST(+1.705737063904886419256501927880148143872040591);
  37 static const fftw_real K642787609 = FFTW_KONST(+0.642787609686539326322643409907263432907559884);
  38 static const fftw_real K766044443 = FFTW_KONST(+0.766044443118978035202392650555416673935832457);
  39 static const fftw_real K1_326827896 = FFTW_KONST(+1.326827896337876792410842639271782594433726619);
  40 static const fftw_real K1_113340798 = FFTW_KONST(+1.113340798452838732905825904094046265936583811);
  41 static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
  42 static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
  43 static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
  44 static const fftw_real K1_732050807 = FFTW_KONST(+1.732050807568877293527446341505872366942805254);
  45
  46 /*
  47  * Generator Id's :
  48  * $Id$
  49  * $Id$
  50  * $Id$
  51  */
  52
  53 void fftw_hc2real_9(const fftw_real *real_input, const fftw_real *imag_input, fftw_real *output, int real_istride, int imag_istride, int ostride)
  54 {
  55      fftw_real tmp3;
  56      fftw_real tmp26;
  57      fftw_real tmp12;
  58      fftw_real tmp20;
  59      fftw_real tmp19;
  60      fftw_real tmp8;
  61      fftw_real tmp17;
  62      fftw_real tmp27;
  63      fftw_real tmp22;
  64      fftw_real tmp28;
  65      fftw_real tmp32;
  66      fftw_real tmp33;
  67      ASSERT_ALIGNED_DOUBLE();
  68      {
  69           fftw_real tmp11;
  70           fftw_real tmp1;
  71           fftw_real tmp2;
  72           fftw_real tmp9;
  73           fftw_real tmp10;
  74           ASSERT_ALIGNED_DOUBLE();
  75           tmp10 = imag_input[3 * imag_istride];
  76           tmp11 = K1_732050807 * tmp10;
  77           tmp1 = real_input[0];
  78           tmp2 = real_input[3 * real_istride];
  79           tmp9 = tmp1 - tmp2;
  80           tmp3 = tmp1 + (K2_000000000 * tmp2);
  81           tmp26 = tmp9 + tmp11;
  82           tmp12 = tmp9 - tmp11;
  83      }
  84      {
  85           fftw_real tmp4;
  86           fftw_real tmp7;
  87           fftw_real tmp18;
  88           fftw_real tmp16;
  89           fftw_real tmp13;
  90           fftw_real tmp21;
  91           ASSERT_ALIGNED_DOUBLE();
  92           tmp4 = real_input[real_istride];
  93           tmp20 = imag_input[imag_istride];
  94           {
  95                fftw_real tmp5;
  96                fftw_real tmp6;
  97                fftw_real tmp14;
  98                fftw_real tmp15;
  99                ASSERT_ALIGNED_DOUBLE();
 100                tmp5 = real_input[4 * real_istride];
 101                tmp6 = real_input[2 * real_istride];
 102                tmp7 = tmp5 + tmp6;
 103                tmp18 = K866025403 * (tmp5 - tmp6);
 104                tmp14 = imag_input[4 * imag_istride];
 105                tmp15 = imag_input[2 * imag_istride];
 106                tmp16 = K866025403 * (tmp14 + tmp15);
 107                tmp19 = tmp15 - tmp14;
 108           }
 109           tmp8 = tmp4 + tmp7;
 110           tmp13 = tmp4 - (K500000000 * tmp7);
 111           tmp17 = tmp13 - tmp16;
 112           tmp27 = tmp13 + tmp16;
 113           tmp21 = (K500000000 * tmp19) + tmp20;
 114           tmp22 = tmp18 + tmp21;
 115           tmp28 = tmp21 - tmp18;
 116      }
 117      output[0] = tmp3 + (K2_000000000 * tmp8);
 118      tmp32 = tmp3 - tmp8;
 119      tmp33 = K1_732050807 * (tmp20 - tmp19);
 120      output[3 * ostride] = tmp32 - tmp33;
 121      output[6 * ostride] = tmp32 + tmp33;
 122      {
 123           fftw_real tmp25;
 124           fftw_real tmp23;
 125           fftw_real tmp24;
 126           fftw_real tmp31;
 127           fftw_real tmp29;
 128           fftw_real tmp30;
 129           ASSERT_ALIGNED_DOUBLE();
 130           tmp25 = (K1_113340798 * tmp17) + (K1_326827896 * tmp22);
 131           tmp23 = (K766044443 * tmp17) - (K642787609 * tmp22);
 132           tmp24 = tmp12 - tmp23;
 133           output[ostride] = tmp12 + (K2_000000000 * tmp23);
 134           output[7 * ostride] = tmp24 + tmp25;
 135           output[4 * ostride] = tmp24 - tmp25;
 136           tmp31 = (K1_705737063 * tmp27) + (K300767466 * tmp28);
 137           tmp29 = (K173648177 * tmp27) - (K984807753 * tmp28);
 138           tmp30 = tmp26 - tmp29;
 139           output[2 * ostride] = tmp26 + (K2_000000000 * tmp29);
 140           output[8 * ostride] = tmp30 + tmp31;
 141           output[5 * ostride] = tmp30 - tmp31;
 142      }
 143 }
 144
 145 fftw_codelet_desc fftw_hc2real_9_desc =
 146 {
 147      "fftw_hc2real_9",
 148      (void (*)()) fftw_hc2real_9,
 149      9,
 150      FFTW_BACKWARD,
 151      FFTW_HC2REAL,
 152      213,
 153      0,
 154      (const int *) 0,
 155 };