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 02:08:53 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 -hc2hc-backward 5 */
27
28 /*
29 * This function contains 64 FP additions, 42 FP multiplications,
30 * (or, 42 additions, 20 multiplications, 22 fused multiply/add),
31 * 25 stack variables, and 40 memory accesses
32 */
33 static const fftw_real K250000000 =
34 FFTW_KONST(+0.250000000000000000000000000000000000000000000);
35 static const fftw_real K559016994 =
36 FFTW_KONST(+0.559016994374947424102293417182819058860154590);
37 static const fftw_real K951056516 =
38 FFTW_KONST(+0.951056516295153572116439333379382143405698634);
39 static const fftw_real K587785252 =
40 FFTW_KONST(+0.587785252292473129168705954639072768597652438);
41 static const fftw_real K2_000000000 =
42 FFTW_KONST(+2.000000000000000000000000000000000000000000000);
43 static const fftw_real K500000000 =
44 FFTW_KONST(+0.500000000000000000000000000000000000000000000);
45 static const fftw_real K1_118033988 =
46 FFTW_KONST(+1.118033988749894848204586834365638117720309180);
47 static const fftw_real K1_175570504 =
48 FFTW_KONST(+1.175570504584946258337411909278145537195304875);
49 static const fftw_real K1_902113032 =
50 FFTW_KONST(+1.902113032590307144232878666758764286811397268);
51
52 /*
53 * Generator Id's :
54 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
55 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
56 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
57 */
58
fftw_hc2hc_backward_5(fftw_real * A,const fftw_complex * W,int iostride,int m,int dist)59 void fftw_hc2hc_backward_5(fftw_real *A, const fftw_complex *W,
60 int iostride, int m, int dist)
61 {
62 int i;
63 fftw_real *X;
64 fftw_real *Y;
65 X = A;
66 Y = A + (5 * iostride);
67 {
68 fftw_real tmp70;
69 fftw_real tmp72;
70 fftw_real tmp61;
71 fftw_real tmp64;
72 fftw_real tmp65;
73 fftw_real tmp66;
74 fftw_real tmp71;
75 fftw_real tmp67;
76 ASSERT_ALIGNED_DOUBLE;
77 {
78 fftw_real tmp68;
79 fftw_real tmp69;
80 fftw_real tmp62;
81 fftw_real tmp63;
82 ASSERT_ALIGNED_DOUBLE;
83 tmp68 = Y[-iostride];
84 tmp69 = Y[-2 * iostride];
85 tmp70 = (K1_902113032 * tmp68) + (K1_175570504 * tmp69);
86 tmp72 = (K1_902113032 * tmp69) - (K1_175570504 * tmp68);
87 tmp61 = X[0];
88 tmp62 = X[iostride];
89 tmp63 = X[2 * iostride];
90 tmp64 = tmp62 + tmp63;
91 tmp65 = K1_118033988 * (tmp62 - tmp63);
92 tmp66 = tmp61 - (K500000000 * tmp64);
93 }
94 X[0] = tmp61 + (K2_000000000 * tmp64);
95 tmp71 = tmp66 - tmp65;
96 X[3 * iostride] = tmp71 - tmp72;
97 X[2 * iostride] = tmp71 + tmp72;
98 tmp67 = tmp65 + tmp66;
99 X[4 * iostride] = tmp67 + tmp70;
100 X[iostride] = tmp67 - tmp70;
101 }
102 X = X + dist;
103 Y = Y - dist;
104 for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 4) {
105 fftw_real tmp13;
106 fftw_real tmp32;
107 fftw_real tmp50;
108 fftw_real tmp39;
109 fftw_real tmp20;
110 fftw_real tmp38;
111 fftw_real tmp21;
112 fftw_real tmp34;
113 fftw_real tmp28;
114 fftw_real tmp33;
115 fftw_real tmp43;
116 fftw_real tmp55;
117 ASSERT_ALIGNED_DOUBLE;
118 {
119 fftw_real tmp19;
120 fftw_real tmp31;
121 fftw_real tmp16;
122 fftw_real tmp30;
123 ASSERT_ALIGNED_DOUBLE;
124 tmp13 = X[0];
125 {
126 fftw_real tmp17;
127 fftw_real tmp18;
128 fftw_real tmp14;
129 fftw_real tmp15;
130 ASSERT_ALIGNED_DOUBLE;
131 tmp17 = X[2 * iostride];
132 tmp18 = Y[-3 * iostride];
133 tmp19 = tmp17 + tmp18;
134 tmp31 = tmp17 - tmp18;
135 tmp14 = X[iostride];
136 tmp15 = Y[-4 * iostride];
137 tmp16 = tmp14 + tmp15;
138 tmp30 = tmp14 - tmp15;
139 }
140 tmp32 = (K587785252 * tmp30) - (K951056516 * tmp31);
141 tmp50 = (K951056516 * tmp30) + (K587785252 * tmp31);
142 tmp39 = K559016994 * (tmp16 - tmp19);
143 tmp20 = tmp16 + tmp19;
144 tmp38 = tmp13 - (K250000000 * tmp20);
145 }
146 {
147 fftw_real tmp27;
148 fftw_real tmp42;
149 fftw_real tmp24;
150 fftw_real tmp41;
151 ASSERT_ALIGNED_DOUBLE;
152 tmp21 = Y[0];
153 {
154 fftw_real tmp25;
155 fftw_real tmp26;
156 fftw_real tmp22;
157 fftw_real tmp23;
158 ASSERT_ALIGNED_DOUBLE;
159 tmp25 = Y[-2 * iostride];
160 tmp26 = X[3 * iostride];
161 tmp27 = tmp25 - tmp26;
162 tmp42 = tmp25 + tmp26;
163 tmp22 = Y[-iostride];
164 tmp23 = X[4 * iostride];
165 tmp24 = tmp22 - tmp23;
166 tmp41 = tmp22 + tmp23;
167 }
168 tmp34 = K559016994 * (tmp24 - tmp27);
169 tmp28 = tmp24 + tmp27;
170 tmp33 = tmp21 - (K250000000 * tmp28);
171 tmp43 = (K587785252 * tmp41) - (K951056516 * tmp42);
172 tmp55 = (K951056516 * tmp41) + (K587785252 * tmp42);
173 }
174 X[0] = tmp13 + tmp20;
175 {
176 fftw_real tmp52;
177 fftw_real tmp58;
178 fftw_real tmp56;
179 fftw_real tmp60;
180 fftw_real tmp51;
181 fftw_real tmp54;
182 ASSERT_ALIGNED_DOUBLE;
183 tmp51 = tmp34 + tmp33;
184 tmp52 = tmp50 + tmp51;
185 tmp58 = tmp51 - tmp50;
186 tmp54 = tmp39 + tmp38;
187 tmp56 = tmp54 - tmp55;
188 tmp60 = tmp54 + tmp55;
189 {
190 fftw_real tmp49;
191 fftw_real tmp53;
192 fftw_real tmp57;
193 fftw_real tmp59;
194 ASSERT_ALIGNED_DOUBLE;
195 tmp49 = c_re(W[0]);
196 tmp53 = c_im(W[0]);
197 Y[-3 * iostride] = (tmp49 * tmp52) - (tmp53 * tmp56);
198 X[iostride] = (tmp53 * tmp52) + (tmp49 * tmp56);
199 tmp57 = c_re(W[3]);
200 tmp59 = c_im(W[3]);
201 Y[0] = (tmp57 * tmp58) - (tmp59 * tmp60);
202 X[4 * iostride] = (tmp59 * tmp58) + (tmp57 * tmp60);
203 }
204 }
205 Y[-4 * iostride] = tmp21 + tmp28;
206 {
207 fftw_real tmp36;
208 fftw_real tmp46;
209 fftw_real tmp44;
210 fftw_real tmp48;
211 fftw_real tmp35;
212 fftw_real tmp40;
213 ASSERT_ALIGNED_DOUBLE;
214 tmp35 = tmp33 - tmp34;
215 tmp36 = tmp32 + tmp35;
216 tmp46 = tmp35 - tmp32;
217 tmp40 = tmp38 - tmp39;
218 tmp44 = tmp40 - tmp43;
219 tmp48 = tmp40 + tmp43;
220 {
221 fftw_real tmp29;
222 fftw_real tmp37;
223 fftw_real tmp45;
224 fftw_real tmp47;
225 ASSERT_ALIGNED_DOUBLE;
226 tmp29 = c_re(W[1]);
227 tmp37 = c_im(W[1]);
228 Y[-2 * iostride] = (tmp29 * tmp36) - (tmp37 * tmp44);
229 X[2 * iostride] = (tmp37 * tmp36) + (tmp29 * tmp44);
230 tmp45 = c_re(W[2]);
231 tmp47 = c_im(W[2]);
232 Y[-iostride] = (tmp45 * tmp46) - (tmp47 * tmp48);
233 X[3 * iostride] = (tmp47 * tmp46) + (tmp45 * tmp48);
234 }
235 }
236 }
237 if (i == m) {
238 fftw_real tmp10;
239 fftw_real tmp12;
240 fftw_real tmp1;
241 fftw_real tmp4;
242 fftw_real tmp5;
243 fftw_real tmp6;
244 fftw_real tmp11;
245 fftw_real tmp7;
246 ASSERT_ALIGNED_DOUBLE;
247 {
248 fftw_real tmp8;
249 fftw_real tmp9;
250 fftw_real tmp2;
251 fftw_real tmp3;
252 ASSERT_ALIGNED_DOUBLE;
253 tmp8 = Y[-iostride];
254 tmp9 = Y[0];
255 tmp10 = (K1_902113032 * tmp8) + (K1_175570504 * tmp9);
256 tmp12 = (K1_175570504 * tmp8) - (K1_902113032 * tmp9);
257 tmp1 = X[2 * iostride];
258 tmp2 = X[iostride];
259 tmp3 = X[0];
260 tmp4 = tmp2 + tmp3;
261 tmp5 = (K500000000 * tmp4) - tmp1;
262 tmp6 = K1_118033988 * (tmp3 - tmp2);
263 }
264 X[0] = tmp1 + (K2_000000000 * tmp4);
265 tmp11 = tmp6 - tmp5;
266 X[2 * iostride] = tmp11 + tmp12;
267 X[3 * iostride] = tmp12 - tmp11;
268 tmp7 = tmp5 + tmp6;
269 X[iostride] = tmp7 - tmp10;
270 X[4 * iostride] = -(tmp7 + tmp10);
271 }
272 }
273
274 static const int twiddle_order[] = { 1, 2, 3, 4 };
275 fftw_codelet_desc fftw_hc2hc_backward_5_desc = {
276 "fftw_hc2hc_backward_5",
277 (void (*)()) fftw_hc2hc_backward_5,
278 5,
279 FFTW_BACKWARD,
280 FFTW_HC2HC,
281 124,
282 4,
283 twiddle_order,
284 };
285