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 6 */
27
28 /*
29 * This function contains 14 FP additions, 4 FP multiplications,
30 * (or, 12 additions, 2 multiplications, 2 fused multiply/add),
31 * 14 stack variables, and 12 memory accesses
32 */
33 static const fftw_real K500000000 =
34 FFTW_KONST(+0.500000000000000000000000000000000000000000000);
35 static const fftw_real K866025403 =
36 FFTW_KONST(+0.866025403784438646763723170752936183471402627);
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
fftw_real2hc_6(const fftw_real * input,fftw_real * real_output,fftw_real * imag_output,int istride,int real_ostride,int imag_ostride)45 void fftw_real2hc_6(const fftw_real *input, fftw_real *real_output,
46 fftw_real *imag_output, int istride, int real_ostride,
47 int imag_ostride)
48 {
49 fftw_real tmp3;
50 fftw_real tmp13;
51 fftw_real tmp9;
52 fftw_real tmp11;
53 fftw_real tmp6;
54 fftw_real tmp12;
55 fftw_real tmp1;
56 fftw_real tmp2;
57 fftw_real tmp10;
58 fftw_real tmp14;
59 ASSERT_ALIGNED_DOUBLE;
60 tmp1 = input[0];
61 tmp2 = input[3 * istride];
62 tmp3 = tmp1 - tmp2;
63 tmp13 = tmp1 + tmp2;
64 {
65 fftw_real tmp7;
66 fftw_real tmp8;
67 fftw_real tmp4;
68 fftw_real tmp5;
69 ASSERT_ALIGNED_DOUBLE;
70 tmp7 = input[4 * istride];
71 tmp8 = input[istride];
72 tmp9 = tmp7 - tmp8;
73 tmp11 = tmp7 + tmp8;
74 tmp4 = input[2 * istride];
75 tmp5 = input[5 * istride];
76 tmp6 = tmp4 - tmp5;
77 tmp12 = tmp4 + tmp5;
78 }
79 imag_output[imag_ostride] = K866025403 * (tmp9 - tmp6);
80 tmp10 = tmp6 + tmp9;
81 real_output[real_ostride] = tmp3 - (K500000000 * tmp10);
82 real_output[3 * real_ostride] = tmp3 + tmp10;
83 imag_output[2 * imag_ostride] = -(K866025403 * (tmp11 - tmp12));
84 tmp14 = tmp12 + tmp11;
85 real_output[2 * real_ostride] = tmp13 - (K500000000 * tmp14);
86 real_output[0] = tmp13 + tmp14;
87 }
88
89 fftw_codelet_desc fftw_real2hc_6_desc = {
90 "fftw_real2hc_6",
91 (void (*)()) fftw_real2hc_6,
92 6,
93 FFTW_FORWARD,
94 FFTW_REAL2HC,
95 134,
96 0,
97 (const int *) 0,
98 };
99