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 02:06:56 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 -hc2real 5 */
27
28 /*
29 * This function contains 12 FP additions, 7 FP multiplications,
30 * (or, 8 additions, 3 multiplications, 4 fused multiply/add),
31 * 12 stack variables, and 10 memory accesses
32 */
33 static const fftw_real K2_000000000 =
34 FFTW_KONST(+2.000000000000000000000000000000000000000000000);
35 static const fftw_real K1_118033988 =
36 FFTW_KONST(+1.118033988749894848204586834365638117720309180);
37 static const fftw_real K500000000 =
38 FFTW_KONST(+0.500000000000000000000000000000000000000000000);
39 static const fftw_real K1_902113032 =
40 FFTW_KONST(+1.902113032590307144232878666758764286811397268);
41 static const fftw_real K1_175570504 =
42 FFTW_KONST(+1.175570504584946258337411909278145537195304875);
43
44 /*
45 * Generator Id's :
46 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
47 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
48 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
49 */
50
fftw_hc2real_5(const fftw_real * real_input,const fftw_real * imag_input,fftw_real * output,int real_istride,int imag_istride,int ostride)51 void fftw_hc2real_5(const fftw_real *real_input,
52 const fftw_real *imag_input, fftw_real *output,
53 int real_istride, int imag_istride, int ostride)
54 {
55 fftw_real tmp10;
56 fftw_real tmp12;
57 fftw_real tmp1;
58 fftw_real tmp4;
59 fftw_real tmp5;
60 fftw_real tmp6;
61 fftw_real tmp11;
62 fftw_real tmp7;
63 ASSERT_ALIGNED_DOUBLE;
64 {
65 fftw_real tmp8;
66 fftw_real tmp9;
67 fftw_real tmp2;
68 fftw_real tmp3;
69 ASSERT_ALIGNED_DOUBLE;
70 tmp8 = imag_input[imag_istride];
71 tmp9 = imag_input[2 * imag_istride];
72 tmp10 = (K1_175570504 * tmp8) - (K1_902113032 * tmp9);
73 tmp12 = (K1_902113032 * tmp8) + (K1_175570504 * tmp9);
74 tmp1 = real_input[0];
75 tmp2 = real_input[real_istride];
76 tmp3 = real_input[2 * real_istride];
77 tmp4 = tmp2 + tmp3;
78 tmp5 = tmp1 - (K500000000 * tmp4);
79 tmp6 = K1_118033988 * (tmp2 - tmp3);
80 }
81 output[0] = tmp1 + (K2_000000000 * tmp4);
82 tmp11 = tmp6 + tmp5;
83 output[ostride] = tmp11 - tmp12;
84 output[4 * ostride] = tmp11 + tmp12;
85 tmp7 = tmp5 - tmp6;
86 output[2 * ostride] = tmp7 - tmp10;
87 output[3 * ostride] = tmp7 + tmp10;
88 }
89
90 fftw_codelet_desc fftw_hc2real_5_desc = {
91 "fftw_hc2real_5",
92 (void (*)()) fftw_hc2real_5,
93 5,
94 FFTW_BACKWARD,
95 FFTW_HC2REAL,
96 125,
97 0,
98 (const int *) 0,
99 };
100