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ftwi_3.c
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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 02:08:24 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 -twiddleinv 3 */
27
28 /*
29 * This function contains 16 FP additions, 12 FP multiplications,
30 * (or, 10 additions, 6 multiplications, 6 fused multiply/add),
31 * 14 stack variables, and 12 memory accesses
32 */
33 static const fftw_real K866025403 =
34 FFTW_KONST(+0.866025403784438646763723170752936183471402627);
35 static const fftw_real K500000000 =
36 FFTW_KONST(+0.500000000000000000000000000000000000000000000);
37
38 /*
39 * Generator Id's :
40 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
41 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
42 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
43 */
44
45 void fftwi_twiddle_3(fftw_complex *A, const fftw_complex *W, int iostride,
46 int m, int dist)
47 {
48 int i;
49 fftw_complex *inout;
50 inout = A;
51 for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 2) {
52 fftw_real tmp1;
53 fftw_real tmp18;
54 fftw_real tmp6;
55 fftw_real tmp15;
56 fftw_real tmp11;
57 fftw_real tmp14;
58 fftw_real tmp12;
59 fftw_real tmp17;
60 ASSERT_ALIGNED_DOUBLE;
61 tmp1 = c_re(inout[0]);
62 tmp18 = c_im(inout[0]);
63 {
64 fftw_real tmp3;
65 fftw_real tmp5;
66 fftw_real tmp2;
67 fftw_real tmp4;
68 ASSERT_ALIGNED_DOUBLE;
69 tmp3 = c_re(inout[iostride]);
70 tmp5 = c_im(inout[iostride]);
71 tmp2 = c_re(W[0]);
72 tmp4 = c_im(W[0]);
73 tmp6 = (tmp2 * tmp3) + (tmp4 * tmp5);
74 tmp15 = (tmp2 * tmp5) - (tmp4 * tmp3);
75 }
76 {
77 fftw_real tmp8;
78 fftw_real tmp10;
79 fftw_real tmp7;
80 fftw_real tmp9;
81 ASSERT_ALIGNED_DOUBLE;
82 tmp8 = c_re(inout[2 * iostride]);
83 tmp10 = c_im(inout[2 * iostride]);
84 tmp7 = c_re(W[1]);
85 tmp9 = c_im(W[1]);
86 tmp11 = (tmp7 * tmp8) + (tmp9 * tmp10);
87 tmp14 = (tmp7 * tmp10) - (tmp9 * tmp8);
88 }
89 tmp12 = tmp6 + tmp11;
90 tmp17 = tmp15 + tmp14;
91 {
92 fftw_real tmp13;
93 fftw_real tmp16;
94 fftw_real tmp19;
95 fftw_real tmp20;
96 ASSERT_ALIGNED_DOUBLE;
97 c_re(inout[0]) = tmp1 + tmp12;
98 tmp13 = tmp1 - (K500000000 * tmp12);
99 tmp16 = K866025403 * (tmp14 - tmp15);
100 c_re(inout[2 * iostride]) = tmp13 - tmp16;
101 c_re(inout[iostride]) = tmp13 + tmp16;
102 c_im(inout[0]) = tmp17 + tmp18;
103 tmp19 = K866025403 * (tmp6 - tmp11);
104 tmp20 = tmp18 - (K500000000 * tmp17);
105 c_im(inout[iostride]) = tmp19 + tmp20;
106 c_im(inout[2 * iostride]) = tmp20 - tmp19;
107 }
108 }
109 }
110
111 static const int twiddle_order[] = { 1, 2 };
112 fftw_codelet_desc fftwi_twiddle_3_desc = {
113 "fftwi_twiddle_3",
114 (void (*)()) fftwi_twiddle_3,
115 3,
116 FFTW_BACKWARD,
117 FFTW_TWIDDLE,
118 77,
119 2,
120 twiddle_order,
121 };
fftw_codelet_desc
Definition: fftw.h:126
fftw-int.h
fftw_complex
Definition: fftw.h:57
FFTW_KONST
#define FFTW_KONST(x)
Definition: fftw-int.h:178
fftw.h
FFTW_TWIDDLE
Definition: fftw.h:121
c_re
#define c_re(c)
Definition: fftw.h:60
FFTW_BACKWARD
Definition: fftw.h:64
ASSERT_ALIGNED_DOUBLE
#define ASSERT_ALIGNED_DOUBLE
Definition: fftw-int.h:236
fftwi_twiddle_3
void fftwi_twiddle_3(fftw_complex *A, const fftw_complex *W, int iostride, int m, int dist)
Definition: ftwi_3.c:45
c_im
#define c_im(c)
Definition: fftw.h:61
fftw_real
float fftw_real
Definition: fftw.h:49
fftwi_twiddle_3_desc
fftw_codelet_desc fftwi_twiddle_3_desc
Definition: ftwi_3.c:112