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 02:07:18 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 16 */
27
28 /*
29 * This function contains 58 FP additions, 18 FP multiplications,
30 * (or, 54 additions, 14 multiplications, 4 fused multiply/add),
31 * 26 stack variables, and 32 memory accesses
32 */
33 static const fftw_real K765366864 =
34 FFTW_KONST(+0.765366864730179543456919968060797733522689125);
35 static const fftw_real K1_847759065 =
36 FFTW_KONST(+1.847759065022573512256366378793576573644833252);
37 static const fftw_real K1_414213562 =
38 FFTW_KONST(+1.414213562373095048801688724209698078569671875);
39 static const fftw_real K2_000000000 =
40 FFTW_KONST(+2.000000000000000000000000000000000000000000000);
41
42 /*
43 * Generator Id's :
44 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
45 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
46 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
47 */
48
fftw_hc2real_16(const fftw_real * real_input,const fftw_real * imag_input,fftw_real * output,int real_istride,int imag_istride,int ostride)49 void fftw_hc2real_16(const fftw_real *real_input,
50 const fftw_real *imag_input, fftw_real *output,
51 int real_istride, int imag_istride, int ostride)
52 {
53 fftw_real tmp9;
54 fftw_real tmp54;
55 fftw_real tmp38;
56 fftw_real tmp21;
57 fftw_real tmp6;
58 fftw_real tmp18;
59 fftw_real tmp42;
60 fftw_real tmp53;
61 fftw_real tmp13;
62 fftw_real tmp29;
63 fftw_real tmp16;
64 fftw_real tmp26;
65 fftw_real tmp23;
66 fftw_real tmp49;
67 fftw_real tmp57;
68 fftw_real tmp56;
69 fftw_real tmp46;
70 fftw_real tmp30;
71 ASSERT_ALIGNED_DOUBLE;
72 {
73 fftw_real tmp7;
74 fftw_real tmp8;
75 fftw_real tmp36;
76 fftw_real tmp19;
77 fftw_real tmp20;
78 fftw_real tmp37;
79 ASSERT_ALIGNED_DOUBLE;
80 tmp7 = real_input[2 * real_istride];
81 tmp8 = real_input[6 * real_istride];
82 tmp36 = tmp7 - tmp8;
83 tmp19 = imag_input[2 * imag_istride];
84 tmp20 = imag_input[6 * imag_istride];
85 tmp37 = tmp19 + tmp20;
86 tmp9 = K2_000000000 * (tmp7 + tmp8);
87 tmp54 = K1_414213562 * (tmp36 + tmp37);
88 tmp38 = K1_414213562 * (tmp36 - tmp37);
89 tmp21 = K2_000000000 * (tmp19 - tmp20);
90 }
91 {
92 fftw_real tmp5;
93 fftw_real tmp41;
94 fftw_real tmp3;
95 fftw_real tmp39;
96 ASSERT_ALIGNED_DOUBLE;
97 {
98 fftw_real tmp4;
99 fftw_real tmp40;
100 fftw_real tmp1;
101 fftw_real tmp2;
102 ASSERT_ALIGNED_DOUBLE;
103 tmp4 = real_input[4 * real_istride];
104 tmp5 = K2_000000000 * tmp4;
105 tmp40 = imag_input[4 * imag_istride];
106 tmp41 = K2_000000000 * tmp40;
107 tmp1 = real_input[0];
108 tmp2 = real_input[8 * real_istride];
109 tmp3 = tmp1 + tmp2;
110 tmp39 = tmp1 - tmp2;
111 }
112 tmp6 = tmp3 + tmp5;
113 tmp18 = tmp3 - tmp5;
114 tmp42 = tmp39 - tmp41;
115 tmp53 = tmp39 + tmp41;
116 }
117 {
118 fftw_real tmp44;
119 fftw_real tmp48;
120 fftw_real tmp47;
121 fftw_real tmp45;
122 ASSERT_ALIGNED_DOUBLE;
123 {
124 fftw_real tmp11;
125 fftw_real tmp12;
126 fftw_real tmp27;
127 fftw_real tmp28;
128 ASSERT_ALIGNED_DOUBLE;
129 tmp11 = real_input[real_istride];
130 tmp12 = real_input[7 * real_istride];
131 tmp13 = tmp11 + tmp12;
132 tmp44 = tmp11 - tmp12;
133 tmp27 = imag_input[imag_istride];
134 tmp28 = imag_input[7 * imag_istride];
135 tmp29 = tmp27 - tmp28;
136 tmp48 = tmp27 + tmp28;
137 }
138 {
139 fftw_real tmp14;
140 fftw_real tmp15;
141 fftw_real tmp24;
142 fftw_real tmp25;
143 ASSERT_ALIGNED_DOUBLE;
144 tmp14 = real_input[3 * real_istride];
145 tmp15 = real_input[5 * real_istride];
146 tmp16 = tmp14 + tmp15;
147 tmp47 = tmp15 - tmp14;
148 tmp24 = imag_input[3 * imag_istride];
149 tmp25 = imag_input[5 * imag_istride];
150 tmp26 = tmp24 - tmp25;
151 tmp45 = tmp24 + tmp25;
152 }
153 tmp23 = tmp13 - tmp16;
154 tmp49 = tmp47 + tmp48;
155 tmp57 = tmp48 - tmp47;
156 tmp56 = tmp44 + tmp45;
157 tmp46 = tmp44 - tmp45;
158 tmp30 = tmp26 + tmp29;
159 }
160 {
161 fftw_real tmp10;
162 fftw_real tmp17;
163 fftw_real tmp34;
164 fftw_real tmp35;
165 ASSERT_ALIGNED_DOUBLE;
166 tmp10 = tmp6 + tmp9;
167 tmp17 = K2_000000000 * (tmp13 + tmp16);
168 output[8 * ostride] = tmp10 - tmp17;
169 output[0] = tmp10 + tmp17;
170 tmp34 = tmp6 - tmp9;
171 tmp35 = K2_000000000 * (tmp29 - tmp26);
172 output[4 * ostride] = tmp34 - tmp35;
173 output[12 * ostride] = tmp34 + tmp35;
174 }
175 {
176 fftw_real tmp22;
177 fftw_real tmp31;
178 fftw_real tmp32;
179 fftw_real tmp33;
180 ASSERT_ALIGNED_DOUBLE;
181 tmp22 = tmp18 - tmp21;
182 tmp31 = K1_414213562 * (tmp23 - tmp30);
183 output[10 * ostride] = tmp22 - tmp31;
184 output[2 * ostride] = tmp22 + tmp31;
185 tmp32 = tmp18 + tmp21;
186 tmp33 = K1_414213562 * (tmp23 + tmp30);
187 output[6 * ostride] = tmp32 - tmp33;
188 output[14 * ostride] = tmp32 + tmp33;
189 }
190 {
191 fftw_real tmp43;
192 fftw_real tmp50;
193 fftw_real tmp51;
194 fftw_real tmp52;
195 ASSERT_ALIGNED_DOUBLE;
196 tmp43 = tmp38 + tmp42;
197 tmp50 = (K1_847759065 * tmp46) - (K765366864 * tmp49);
198 output[9 * ostride] = tmp43 - tmp50;
199 output[ostride] = tmp50 + tmp43;
200 tmp51 = tmp42 - tmp38;
201 tmp52 = (K765366864 * tmp46) + (K1_847759065 * tmp49);
202 output[5 * ostride] = tmp51 - tmp52;
203 output[13 * ostride] = tmp52 + tmp51;
204 }
205 {
206 fftw_real tmp55;
207 fftw_real tmp58;
208 fftw_real tmp59;
209 fftw_real tmp60;
210 ASSERT_ALIGNED_DOUBLE;
211 tmp55 = tmp53 - tmp54;
212 tmp58 = (K765366864 * tmp56) - (K1_847759065 * tmp57);
213 output[11 * ostride] = tmp55 - tmp58;
214 output[3 * ostride] = tmp58 + tmp55;
215 tmp59 = tmp54 + tmp53;
216 tmp60 = (K1_847759065 * tmp56) + (K765366864 * tmp57);
217 output[7 * ostride] = tmp59 - tmp60;
218 output[15 * ostride] = tmp60 + tmp59;
219 }
220 }
221
222 fftw_codelet_desc fftw_hc2real_16_desc = {
223 "fftw_hc2real_16",
224 (void (*)()) fftw_hc2real_16,
225 16,
226 FFTW_BACKWARD,
227 FFTW_HC2REAL,
228 367,
229 0,
230 (const int *) 0,
231 };
232