1 /*
2 * Copyright (c) 1997-1999, 2003 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 Mon Mar 24 02:05:52 EST 2003 */
22
23 #include "fftw-int.h"
24 #include "fftw.h"
25
26 /* Generated by: /homee/stevenj/cvs/fftw/gensrc/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 =
34 FFTW_KONST(+0.250000000000000000000000000000000000000000000);
35 static const fftw_real K559016994 =
36 FFTW_KONST(+0.559016994374947424102293417182819058860154590);
37 static const fftw_real K587785252 =
38 FFTW_KONST(+0.587785252292473129168705954639072768597652438);
39 static const fftw_real K951056516 =
40 FFTW_KONST(+0.951056516295153572116439333379382143405698634);
41
42 /*
43 * Generator Id's :
44 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
45 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
46 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
47 */
48
fftw_real2hc_5(const fftw_real * input,fftw_real * real_output,fftw_real * imag_output,int istride,int real_ostride,int imag_ostride)49 void fftw_real2hc_5(const fftw_real *input, fftw_real *real_output,
50 fftw_real *imag_output, int istride, int real_ostride,
51 int imag_ostride)
52 {
53 fftw_real tmp10;
54 fftw_real tmp7;
55 fftw_real tmp8;
56 fftw_real tmp3;
57 fftw_real tmp11;
58 fftw_real tmp6;
59 fftw_real tmp9;
60 fftw_real tmp12;
61 ASSERT_ALIGNED_DOUBLE;
62 tmp10 = input[0];
63 {
64 fftw_real tmp1;
65 fftw_real tmp2;
66 fftw_real tmp4;
67 fftw_real tmp5;
68 ASSERT_ALIGNED_DOUBLE;
69 tmp1 = input[istride];
70 tmp2 = input[4 * istride];
71 tmp7 = tmp1 + tmp2;
72 tmp4 = input[2 * istride];
73 tmp5 = input[3 * istride];
74 tmp8 = tmp4 + tmp5;
75 tmp3 = tmp1 - tmp2;
76 tmp11 = tmp7 + tmp8;
77 tmp6 = tmp4 - tmp5;
78 }
79 imag_output[imag_ostride] =
80 -((K951056516 * tmp3) + (K587785252 * tmp6));
81 imag_output[2 * imag_ostride] =
82 (K951056516 * tmp6) - (K587785252 * tmp3);
83 real_output[0] = tmp11 + tmp10;
84 tmp9 = K559016994 * (tmp7 - tmp8);
85 tmp12 = tmp10 - (K250000000 * tmp11);
86 real_output[real_ostride] = tmp9 + tmp12;
87 real_output[2 * real_ostride] = tmp12 - tmp9;
88 }
89
90 fftw_codelet_desc fftw_real2hc_5_desc = {
91 "fftw_real2hc_5",
92 (void (*)()) fftw_real2hc_5,
93 5,
94 FFTW_FORWARD,
95 FFTW_REAL2HC,
96 112,
97 0,
98 (const int *) 0,
99 };
100