Subversion Repositories shark

Rev

Rev 3 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 pj 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 13:55:04 EDT 1999 */
22
 
107 pj 23
#include <fftw-int.h>
24
#include <fftw.h>
2 pj 25
 
26
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2real 3 */
27
 
28
/*
29
 * This function contains 4 FP additions, 2 FP multiplications,
30
 * (or, 3 additions, 1 multiplications, 1 fused multiply/add),
31
 * 5 stack variables, and 6 memory accesses
32
 */
33
static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
34
static const fftw_real K1_732050807 = FFTW_KONST(+1.732050807568877293527446341505872366942805254);
35
 
36
/*
37
 * Generator Id's :
107 pj 38
 * $Id: fcr_3.c,v 1.2 2003-03-24 11:14:55 pj Exp $
39
 * $Id: fcr_3.c,v 1.2 2003-03-24 11:14:55 pj Exp $
40
 * $Id: fcr_3.c,v 1.2 2003-03-24 11:14:55 pj Exp $
2 pj 41
 */
42
 
43
void fftw_hc2real_3(const fftw_real *real_input, const fftw_real *imag_input, fftw_real *output, int real_istride, int imag_istride, int ostride)
44
{
45
     fftw_real tmp5;
46
     fftw_real tmp1;
47
     fftw_real tmp2;
48
     fftw_real tmp3;
49
     fftw_real tmp4;
50
     ASSERT_ALIGNED_DOUBLE();
51
     tmp4 = imag_input[imag_istride];
52
     tmp5 = K1_732050807 * tmp4;
53
     tmp1 = real_input[0];
54
     tmp2 = real_input[real_istride];
55
     tmp3 = tmp1 - tmp2;
56
     output[0] = tmp1 + (K2_000000000 * tmp2);
57
     output[2 * ostride] = tmp3 + tmp5;
58
     output[ostride] = tmp3 - tmp5;
59
}
60
 
61
fftw_codelet_desc fftw_hc2real_3_desc =
62
{
63
     "fftw_hc2real_3",
64
     (void (*)()) fftw_hc2real_3,
65
     3,
66
     FFTW_BACKWARD,
67
     FFTW_HC2REAL,
68
     81,
69
     0,
70
     (const int *) 0,
71
};