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 02:05:54 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 8 */
27
28 /*
29 * This function contains 20 FP additions, 2 FP multiplications,
30 * (or, 20 additions, 2 multiplications, 0 fused multiply/add),
31 * 12 stack variables, and 16 memory accesses
32 */
33 static const fftw_real K707106781 =
34 FFTW_KONST(+0.707106781186547524400844362104849039284835938);
35
36 /*
37 * Generator Id's :
38 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
39 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
40 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
41 */
42
fftw_real2hc_8(const fftw_real * input,fftw_real * real_output,fftw_real * imag_output,int istride,int real_ostride,int imag_ostride)43 void fftw_real2hc_8(const fftw_real *input, fftw_real *real_output,
44 fftw_real *imag_output, int istride, int real_ostride,
45 int imag_ostride)
46 {
47 fftw_real tmp3;
48 fftw_real tmp7;
49 fftw_real tmp13;
50 fftw_real tmp19;
51 fftw_real tmp6;
52 fftw_real tmp16;
53 fftw_real tmp10;
54 fftw_real tmp18;
55 ASSERT_ALIGNED_DOUBLE;
56 {
57 fftw_real tmp1;
58 fftw_real tmp2;
59 fftw_real tmp11;
60 fftw_real tmp12;
61 ASSERT_ALIGNED_DOUBLE;
62 tmp1 = input[0];
63 tmp2 = input[4 * istride];
64 tmp3 = tmp1 + tmp2;
65 tmp7 = tmp1 - tmp2;
66 tmp11 = input[7 * istride];
67 tmp12 = input[3 * istride];
68 tmp13 = tmp11 - tmp12;
69 tmp19 = tmp11 + tmp12;
70 }
71 {
72 fftw_real tmp4;
73 fftw_real tmp5;
74 fftw_real tmp8;
75 fftw_real tmp9;
76 ASSERT_ALIGNED_DOUBLE;
77 tmp4 = input[2 * istride];
78 tmp5 = input[6 * istride];
79 tmp6 = tmp4 + tmp5;
80 tmp16 = tmp4 - tmp5;
81 tmp8 = input[istride];
82 tmp9 = input[5 * istride];
83 tmp10 = tmp8 - tmp9;
84 tmp18 = tmp8 + tmp9;
85 }
86 {
87 fftw_real tmp17;
88 fftw_real tmp20;
89 fftw_real tmp14;
90 fftw_real tmp15;
91 ASSERT_ALIGNED_DOUBLE;
92 real_output[2 * real_ostride] = tmp3 - tmp6;
93 tmp17 = tmp3 + tmp6;
94 tmp20 = tmp18 + tmp19;
95 real_output[4 * real_ostride] = tmp17 - tmp20;
96 real_output[0] = tmp17 + tmp20;
97 imag_output[2 * imag_ostride] = tmp19 - tmp18;
98 tmp14 = K707106781 * (tmp10 + tmp13);
99 real_output[3 * real_ostride] = tmp7 - tmp14;
100 real_output[real_ostride] = tmp7 + tmp14;
101 tmp15 = K707106781 * (tmp13 - tmp10);
102 imag_output[imag_ostride] = tmp15 - tmp16;
103 imag_output[3 * imag_ostride] = tmp16 + tmp15;
104 }
105 }
106
107 fftw_codelet_desc fftw_real2hc_8_desc = {
108 "fftw_real2hc_8",
109 (void (*)()) fftw_real2hc_8,
110 8,
111 FFTW_FORWARD,
112 FFTW_REAL2HC,
113 178,
114 0,
115 (const int *) 0,
116 };
117