1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* Copyright (c) 1997-1999 Massachusetts Institute of Technology
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* This file was automatically generated --- DO NOT EDIT */
/* Generated on Sun Nov 7 20:43:54 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -real2hc 6 */
/*
* This function contains 14 FP additions, 4 FP multiplications,
* (or, 12 additions, 2 multiplications, 2 fused multiply/add),
* 14 stack variables, and 12 memory accesses
*/
static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
/*
* Generator Id's :
* $Id: frc_6.c,v 1.1.1.1 2006/05/12 15:14:59 veplaini Exp $
* $Id: frc_6.c,v 1.1.1.1 2006/05/12 15:14:59 veplaini Exp $
* $Id: frc_6.c,v 1.1.1.1 2006/05/12 15:14:59 veplaini Exp $
*/
void fftw_real2hc_6(const fftw_real *input, fftw_real *real_output, fftw_real *imag_output, int istride, int real_ostride, int imag_ostride)
{
fftw_real tmp3;
fftw_real tmp13;
fftw_real tmp9;
fftw_real tmp11;
fftw_real tmp6;
fftw_real tmp12;
fftw_real tmp1;
fftw_real tmp2;
fftw_real tmp10;
fftw_real tmp14;
ASSERT_ALIGNED_DOUBLE;
tmp1 = input[0];
tmp2 = input[3 * istride];
tmp3 = tmp1 - tmp2;
tmp13 = tmp1 + tmp2;
{
fftw_real tmp7;
fftw_real tmp8;
fftw_real tmp4;
fftw_real tmp5;
ASSERT_ALIGNED_DOUBLE;
tmp7 = input[4 * istride];
tmp8 = input[istride];
tmp9 = tmp7 - tmp8;
tmp11 = tmp7 + tmp8;
tmp4 = input[2 * istride];
tmp5 = input[5 * istride];
tmp6 = tmp4 - tmp5;
tmp12 = tmp4 + tmp5;
}
imag_output[imag_ostride] = K866025403 * (tmp9 - tmp6);
tmp10 = tmp6 + tmp9;
real_output[real_ostride] = tmp3 - (K500000000 * tmp10);
real_output[3 * real_ostride] = tmp3 + tmp10;
imag_output[2 * imag_ostride] = -(K866025403 * (tmp11 - tmp12));
tmp14 = tmp12 + tmp11;
real_output[2 * real_ostride] = tmp13 - (K500000000 * tmp14);
real_output[0] = tmp13 + tmp14;
}
fftw_codelet_desc fftw_real2hc_6_desc =
{
"fftw_real2hc_6",
(void (*)()) fftw_real2hc_6,
6,
FFTW_FORWARD,
FFTW_REAL2HC,
134,
0,
(const int *) 0,
};
|