1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
/*
* filter-i386.h -- optimized filter routines
*
* Copyright (C) 1996
* Thomas Sailer (sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* ---------------------------------------------------------------------- */
#ifndef _FILTER_I386_H
#define _FILTER_I386_H
/* ---------------------------------------------------------------------- */
#define __HAVE_ARCH_MAC
#define mac(a,b,size) \
(__builtin_constant_p(size) ? __mac_c((a),(b),(size)) : __mac_g((a),(b),(size)))
#include <stdio.h>
extern inline float __mac_g(const float *a, const float *b, unsigned int size)
{
float sum = 0;
unsigned int i;
for (i = 0; i < size; i++)
sum += (*a++) * (*b++);
return sum;
}
extern inline float __mac_c(const float *a, const float *b, unsigned int size)
{
float f;
/*
* inspired from Phil Karn, KA9Q's home page
*/
switch (size) {
case 9:
asm volatile ("flds (%1);\n\t"
"fmuls (%2);\n\t"
"flds 4(%1);\n\t"
"fmuls 4(%2);\n\t"
"flds 8(%1);\n\t"
"fmuls 8(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 12(%1);\n\t"
"fmuls 12(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 16(%1);\n\t"
"fmuls 16(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 20(%1);\n\t"
"fmuls 20(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 24(%1);\n\t"
"fmuls 24(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 28(%1);\n\t"
"fmuls 28(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 32(%1);\n\t"
"fmuls 32(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"faddp;\n\t" :
"=t" (f) :
"r" (a),
"r" (b) : "memory");
return f;
case 18:
asm volatile ("flds (%1);\n\t"
"fmuls (%2);\n\t"
"flds 4(%1);\n\t"
"fmuls 4(%2);\n\t"
"flds 8(%1);\n\t"
"fmuls 8(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 12(%1);\n\t"
"fmuls 12(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 16(%1);\n\t"
"fmuls 16(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 20(%1);\n\t"
"fmuls 20(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 24(%1);\n\t"
"fmuls 24(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 28(%1);\n\t"
"fmuls 28(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 32(%1);\n\t"
"fmuls 32(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 36(%1);\n\t"
"fmuls 36(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 40(%1);\n\t"
"fmuls 40(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 44(%1);\n\t"
"fmuls 44(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 48(%1);\n\t"
"fmuls 48(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 52(%1);\n\t"
"fmuls 52(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 56(%1);\n\t"
"fmuls 56(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 60(%1);\n\t"
"fmuls 60(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 64(%1);\n\t"
"fmuls 64(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 68(%1);\n\t"
"fmuls 68(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"faddp;\n\t" :
"=t" (f) :
"r" (a),
"r" (b) : "memory");
return f;
case 24:
asm volatile ("flds (%1);\n\t"
"fmuls (%2);\n\t"
"flds 4(%1);\n\t"
"fmuls 4(%2);\n\t"
"flds 8(%1);\n\t"
"fmuls 8(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 12(%1);\n\t"
"fmuls 12(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 16(%1);\n\t"
"fmuls 16(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 20(%1);\n\t"
"fmuls 20(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 24(%1);\n\t"
"fmuls 24(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 28(%1);\n\t"
"fmuls 28(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 32(%1);\n\t"
"fmuls 32(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 36(%1);\n\t"
"fmuls 36(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 40(%1);\n\t"
"fmuls 40(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 44(%1);\n\t"
"fmuls 44(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 48(%1);\n\t"
"fmuls 48(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 52(%1);\n\t"
"fmuls 52(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 56(%1);\n\t"
"fmuls 56(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 60(%1);\n\t"
"fmuls 60(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 64(%1);\n\t"
"fmuls 64(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 68(%1);\n\t"
"fmuls 68(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 72(%1);\n\t"
"fmuls 72(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 76(%1);\n\t"
"fmuls 76(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 80(%1);\n\t"
"fmuls 80(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 84(%1);\n\t"
"fmuls 84(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 88(%1);\n\t"
"fmuls 88(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"flds 92(%1);\n\t"
"fmuls 92(%2);\n\t"
"fxch %%st(2);\n\t"
"faddp;\n\t"
"faddp;\n\t" :
"=t" (f) :
"r" (a),
"r" (b) : "memory");
return f;
case 42:
/* Thomas, Help! EAS needs this optimized. -Maitland */
return __mac_g(a, b, size);
default:
printf("Warning: optimize __mac_c(..., ..., %d)\n", size);
return __mac_g(a, b, size);
}
}
/* ---------------------------------------------------------------------- */
#endif /* _FILTER_I386_H */
|
